700 results about "Impact effect" patented technology

The invention discloses a sealing ring, which comprises a base body, a first elastic element and a support element used for supporting, wherein the base body is provided with a groove, the support element is fixedly arranged in the groove, the first elastic element is arranged between the support element and the inner side wall of the groove in a clamping way, and in addition, the first elastic element exerts the force in the direction towards the axis center when receiving the impact by fluid. When the sealing ring provided by the invention is adopted, and when the sealing ring receives the impact by the fluid, on one hand, the base body has a certain impact resistance effect on the fluid, and on the other hand, the elastic element receives the impact effect of the fluid and exerts the force in the direction towards the axis center on the base body, so that the contact of the base body and the part passing through the shaft hole is tighter, so that a good sealing effect is achieved. Therefore the sealing ring has the excellent high-pressure fluid dynamic sealing performance, and in addition, the service life is long. The invention also discloses a sealing device comprising the sealing ring.

A system for managing impacting effects in an electronic system due to the presence of wireless energy transfer oscillating electromagnetic fields includes a controller, a field sensing component communicatively coupled to the controller and configured to measure at least one oscillating energy field and an adjustable filter element communicatively coupled to the controller, wherein the adjustable filter may be adjusted by the controller based, at least in part, on measurements of the field sensing component to reduce effects of the at least one oscillating energy field on the sensing component.

The invention discloses a method for filling and mining after ore caving, which includes the following steps: exploiting; mining quasi work; cutting work: including excavation of mine collection trench and patio cutting, cutting a patio at one end portion of a rock drilling chamber, cutting the patio by using a vertical deep hole ore falling stage chamber method, and enabling patio cutting to provide sufficient compensation space for actual mining; chamber extraction work: constructing a downward blasthole in the rock drilling chamber, filling and blasting, one-time blasting charging at the entire middle section height of the blasthole, and enabling blasting to adopt one-time lateral blasting and ore removal; filling and maintaining: closing all outlets communicated with a lower mine of the empty area, burying strainer pipes, leading in filling pipelines from the upper portion of the chamber, and filling and maintaining the chamber; and pillar recovery: recovering pillars after filling and maintaining the chamber, and the pillar recovery is the same as the chamber extraction work. The method for filling and mining after ore caving is high in recovery rate of mineral resources, small in blasting impact effect, low in cost and high in production efficiency.

The invention provides a Yunjie mill. The Yunjie mill adopts a Yunjie mill main engine composed of a shell body, a rotor with a powder mill and a grading function and an inner circulating pipe, so that materials are pulverized and dried at the same time in a high-speed circulating flowing process in an inner circulating channel composed of an inner circulating pipe, a pulverizing impeller, a spacebetween the pulverizing impeller and an inner wall of a barrel body and the like; a wall remaining problem of the inner circulating channel is solved by utilizing an impact effect of a high-speed material flow; the wall remaining problem of an outer circulating channel is solved by controlling the moisture content of materials, discharged by the main engine, through a grading impeller; the defects of equipment in the inventive patent 2015110139212 are overcome and a method and a product of the inventive patent 2015110139212 are economically realized; the invention provides an application method of the Yunjie mill, so that the drying and pulverizing problem of high-moisture and high-viscosity materials including vegetable materials, meat, liquid materials and the like is solved; a solutionwith good economical efficiency is provided for processing feed and preparing a medicine which takes a volatile component as a functional component.

The invention discloses a sliding elastic beam and spring combined nonlinear ultra-low frequency vibration isolator, which mainly comprises a sliding elastic beam with negative rigidity and a spring with positive rigidity, and is provided with a connection component and a supporting structure, wherein the spring is connected below the sliding elastic beam; the connection component is used for connecting the sliding elastic beam; the supporting structure is used for supporting the sliding elastic beam; the sliding elastic beam has negative rigidity during deformation; the spring is of positive rigidity; and the entire vibration isolator has the characteristic of near zero rigidity because of combination of the two elastic elements. The entire system, namely the sliding beam and spring combined nonlinear ultra-low frequency vibration isolator provided by the invention has the characteristic of approximately dynamic quasi zero rigidity, can be used for isolating vibration of ultra-low frequency and has an anti-impact effect.

The invention discloses directional knockout on sheep MSTN gene by applying the CRISPR / Cas9 technology, and a method for verifying the impact effect of directional knockout on skeletal muscle satellite cell differentiation. The concrete contents are as follows: firstly, target gene cloning; secondly, gRBA design and synthesis; thirdly, CRISPR / Cas9 gene knockout vector construction; fourthly, CRISPR / Cas9 gene knockout vector exogenous activity detection; fifthly, CRISPR / Cas9 gene knockout vector endogenous activity detection; sixthly, CRISPR / Cas9 gene knockout vector knockout effect detection. The method has the following advantages: firstly, the experimental period is shorter; secondly, the method is simple and practicable, has high repeatability, and can be performed in common laboratories; thirdly, active vector constructed through the method is small in toxic and side effects, and can be applied to the preparation and production of transgenic animals; fourthly, the method is small in non-specific shear, and obviously improves the gene targeting knockout efficiency; fifthly, the method is high in applicability.

Techniques are provided for generating pre-pulse pain inhibition (PPI) pulses and subsequent main cardioversion shocks. The PPI pulses are relatively low-voltage pulses each having a chevron-shaped waveform. The main shocks are relatively high-voltage shocks each having a plateau-shaped waveform. By employing plateau-shaped waveforms for the main shocks, a greater cardiac membrane response can be achieved at an equivalent peak voltage as compared to conventional shock waveforms. Peak voltage is a significant contributor to pain caused by cardioversion shocks. Hence, by using the plateau-shaped waveform, pain reduction can be achieved without loss of shock effectiveness. Moreover, by employing chevron-shaped PPI pulses in combination with plateau-shaped main shocks, a relatively simple shocking circuit having a single high-voltage shocking capacitor may be used, thus eliminating the need for both low-voltage PPI capacitors and higher voltage main shock capacitors. The shocking circuit includes a low-pass resistive-capacitive filter.

The present invention provides a thin vehicle closure panel design that substantially reduces a thickness (panel gauge plus the perpendicular distance or depth between the panels) of a vehicle hood (5) and the impact effect on the head of a pedestrian struck by a motor vehicle. In one embodiment, the vehicle hood (5) includes a hood shell (15) including an outer panel (25) and an inner panel (20); a unitary foam core (100) positioned between and bonded to the outer (25) and / or the inner panel (20) of the hood shell (15); and at least one recess (10) that corresponds to an underhood component (42). In another aspect of the invention, a vehicle hood (5) is provided in which a latch attachment member (60) and / or hinge members (70) are attached to inner surface (50) of the inner panel (20) of the hood shell (15).

The invention discloses a fracturing method for increasing the complexity of a high-temperature stratum artificial crack net and belongs to the technical field of petroleum and natural gas engineeringexploitation. The method comprises the following steps that low-temperature work liquid is injected into a high-temperature stratum, a strong cold-hot stress impacting effect is generated through thehigh-temperature difference between the low-temperature work liquid and the high-temperature stratum, rock around a well is induced to generate micro cracks, then fracturing liquid is injected to enable the micro cracks to continue to expand forwards, finally temporary plugging steering liquid is injected to conduct bridge plugging on the artificial cracks to force the cracks to steer to form multi-branch cracks, and the steps are executed at least once. Through the fracturing method, the multiple artificial cracks can be formed, the seepage area is enlarged, the single-well yield and economic benefits are increased, the bursting pressure can be lowered, the fracturing construction risk caused by high temporary plugging steering pressure in the high-temperature stratum is avoided, and safe construction is ensured. The fracturing method is suitable for the high-temperature strata such as hot dry rock, deep-layer shale gas and deep-layer compact oil gas, can be used for vertical well fracturing construction and can also be applied to fracturing construction of horizontal wells, oblique wells and the like.

The invention belongs to the technical field of magnetic grinding, and in particular, relates to an inner surface polishing device of a large-length-diameter-ratio slender pipe and a method thereof. The polishing device is characterized by comprising a machine tool body, a moving mechanism arranged on the machine tool body, a workpiece clamping mechanism arranged on the machine tool body and a grinding mechanism arranged on the machine tool body; the grinding mechanism includes an ultrasonic generator and a magnetic grinding device; and the magnetic grinding device includes an external grinding device and an internal grinding device. The polishing device adds ultrasonic vibration into the traditional magnetic grinding process, so that magnetic grinding particles generate a high-frequency impact effect on the inner surface of the slender pipe; an auxiliary magnetic pole is added in an inner cavity of the slender pipe for forming a magnetic loop with an external magnetic pole, so that the magnetic induction strength of unit space is improved, and the grinding pressure is also increased; and the material removing quantity is 1.5 times of that in traditional magnetic grinding.

The invention discloses a strong laser driven explosion and impact effect test platform which comprises a drive system, testing environments, a measurement system and a control system, wherein the control system is respectively connected with the drive system, the test environments and the measurement system. Through an integrated design and development of different test environments, the test platform realizes multiple laser driven explosion and impact functions and has openness; and meanwhile, through coordination and cooperation of multiple high-speed and high-resolution rate testing means, a plurality of physical fields (speed, pressure and image) are measured in real time, and a laser drive explosion and impact test process can be more completely characterized.

The invention provides a residual life prediction method for a non-stationary degradation process with uncertain impact and belongs to the technical field of reliability engineering. The impact effect is combined with a continuous degradation process, thereby more reasonably describing the actual degradation process. In a state estimation phase, a new online state estimation algorithm is provided to identify the real system state and to provide a necessary support for subsequent residual life prediction. In a parameter estimation stage, unknown parameters in a model are obtained by adopting an expectation maximization algorithm. For residual life production, the uncertainty of state estimation and the influence of the impact effect are considered at the same time, and an expression is analyzed to give a probability density function and a cumulative probability density function of residual life prediction distribution. The provided model meets the actual degradation condition, a more accurate residual life prediction result can be obtained, and the residual life prediction method is of great significance in fault prediction and health management in engineering.

The invention discloses a method and a device for polishing a small-bore optical element, and belongs to the technical field of ultraprecise optical polishing. A throttling block of which the shape is matched with that of a surface to be machined and which is provided with a slot way is fixed on the upper part of the surface to be machined of a workpiece; the workpiece rotates around the own rotating shaft; a flexibly cyclic polishing belt is formed on the slot way by using fine abrasive particle fluid and machines the surface of the workpiece. By using pressure difference and a mode of fluid suction, the fluidity and sliding friction property of the fine abrasive particle fluid is enhanced; by adoption of ultrasonic vibration of an axisymmetric rotating curved-surface workpiece, the impact effect and cutting effect of fine abrasive particles on the workpiece are enhanced, so that the material removal rate is enhanced, the surface with high quality is obtained efficiently, and surface scatheless trace removal is realized. The method and the device are applied to ultraprecise polishing of curved surfaces of various rotationally-symmetrical optical elements and are high in practical value in the aspect of automatic processing.

A method of indicating the presence of mechanical impact is used with a low-ductility material, such as a composite material, having a tensile elongation to failure of less than about 2 percent. The method includes preparing an indicator paint having an impact-sensitive component that produces a visible change when subjected to a mechanical impact, applying the indicator paint to the surface of the low-ductility material, placing the low-ductility material having the indicator paint thereon into circumstances where it may be subject to the mechanical impact, and thereafter inspecting the low-ductility material having the indicator paint thereon for the presence of the visible change. The method may be used to establish design criteria for the low-ductility material by establishing an impact-effect threshold value from the step of inspecting, and determining a design limit for the low-ductility material responsive to the impact-effect threshold value. One result of the using the present approach is to reduce the structural weight by reducing the barely visible impact damage design factor.

The present invention provides a thin vehicle closure panel design that substantially reduces a thickness (panel gauge plus the perpendicular distance or depth between the panels) of a vehicle hood (5) and the impact effect on the head of a pedestrian struck by a motor vehicle. In one embodiment, the vehicle hood (5) includes a hood shell (15) including an outer panel (25) and an inner panel (20); a unitary foam core (100) positioned between and bonded to the outer (25) and / or the inner panel (20) of the hood shell (15); and at least one recess (10) that corresponds to an underhood component (42). In another aspect of the invention, a vehicle hood (5) is provided in which a latch attachment member (60) and / or hinge members (70) are attached to inner surface (50) of the inner panel (20) of the hood shell (15).

A speed hump device for discouraging vehicles form exceeding a designed threshold speed is disclosed. The speed hump device mainly comprises: a housing device, whose figure is like a box, having a housing room therein and a opening thereon; a hump device with a hump member and a arc-shaped member pivoted on the housing device by a first pivot, the hump member can be rotated in and out the housing room from the opening about the first pivot; a transmission device including a gear set, a transmitting mechanism and a abutment member, wherein the arc-shaped member is engaged with one gear of the gear set; a rebound device used to push the hump member out the housing device when no extra force presses on the hump member. When a car passing through the speed hump device with a slow speed, e.g., below a threshold speed, the abutment member will be put down and the hump member can be depressed in the housing room by the wheels of the car, hence the hump member as a jolt will disappear and the car will traverse smoothly; on the contrary, if the speed of the car is over the threshold speed, the hump member will be still in the position out the housing room that a jolt will occur to cause a impact effect to the car. Additionally, the hump member of the speed hump device will have an impedimental effect to a car goes against the traffic flow direction. Moreover, it does not consume any additional energy to drive the speed hump device.

The invention discloses an analysis system and an evaluation method for power telecommunication business risks. The analysis system comprises a business impact analysis unit, a risk probability analysis unit and a communication risk evaluation unit. The business impact analysis unit is used for quantitatively assigning values for different types of power telecommunication network management businesses according to importance degrees and social impact effects of the businesses. The risk probability analysis unit is used for analyzing channel organization factor, route association factor, history data statistics factor and channel risk factor, and determining a probability value of each factor. The communication risk evaluation unit is connected with the business impact analysis unit and the risk probability analysis unit, and is used for obtaining a risk value of a power telecommunication business according to the quantitatively assigned value and the probability value. Various factors impacting the power telecommunication network communication business risks are comprehensively considered, so that the risk warning and evaluating index system of the power telecommunication network is more stable, more reliable, and applicable to making determination to achieve an effective warning result.

The invention belongs to the field of technical equipment used in oil and natural gas drilling engineering, mine exploiting, geological drilling, constructional engineering, tunnel engineering, shielding and non-excavation, and relates to a novel PDC drill bit utilizing the impact effect for improving heart rock breaking efficiency. The PDC drill bit solves the problems that in the drilling process, a center rock column left in the center part influences drilling efficiency, and the position deviating from the center of a well hole shakes left and right. According to the technical scheme, the upper end of a turbine is fixed through a nut, the lower end of the turbine is fixed through a boss on a turbine shaft, an upper cam is connected to the turbine shaft through threads, a lower cam is fixed to a punch hammer through a sunk screw, the upper section of the punch hammer is hollow, a pore passage enabling drilling fluid to flow out is formed in the upper end of a shell on the lower portion, a pressing head with the top end provided with a tip-shaped PDC tooth is added to the tail end of a connecting cavity, as a main impact part, the lower end of the punch hammer becomes thin, and a bi-directional thrust ball bearing is placed at the lower end. The equipment enables the heart to generate longitudinal impact, improves the rock breaking efficiency and reduces drilling cost.

The invention relates to a flow distributing type hydraulic oscillation circumferential impactor. The flow distributing type hydraulic oscillation circumferential impactor comprises a shell connector, a double-bus jet generator, a flow distributor, a gland, a hydraulic drive hammer and a transmission short joint. The double-bus jet generator abuts against the interior of the shell connector. The hydraulic drive hammer is installed at the upper portion of the transmission short joint. The flow distributor and the gland are located between the double-bus jet generator and the hydraulic drive hammer. The transmission short joint is screwed in the lower end of the shell connector and abuts against the gland. An annular groove and a flow releasing channel are formed in the inner wall of the shell connector. The annular groove corresponds to a returned liquid outlet in the outer wall of the double-bus jet generator, and a drainage hole is formed in the transmission short joint. The double-bus jet generator is a cylinder with a center runner. The center runner is divided into a left branch runner and a right branch runner through a check block. The inlet and the outlet of a pressure feedback channel in the double-bus jet generator are communicated with the center runner. Each branch runner is divided into two parts through the flow distributor. The hydraulic drive hammer is provided with symmetric arc bosses. Arc cavities contain the arc bosses. According to the flow distributing type hydraulic oscillation circumferential impactor, no weak part exists, the service life is long, and the impact effect is good.

The invention discloses a reducing impact insertion-cutting type annular banana comb cutting device. The reducing impact insertion-cutting type annular banana comb cutting device comprises a lifting frame and at least three cutting units, wherein the lifting frame is provided with a workbench and a lifting mechanism for lifting and lowering the workbench; the cutting units are annularly arranged on the workbench; the cutting units comprise parallelogram mechanisms, comb cutting knife groups and knife group synchronous controllers. The lifting mechanism of the banana comb cutting device has an impact effect. When fruit stems are in contact with hard blades or soft blades during banana comb cutting, insertion cutting of banana stems under the impact of the hard blades and the soft blades can be realized by controlling the revolving of runners, so that the aims of removing stalks and cutting combs are fulfilled, the cutting quality can be improved, the comb cutting time is shortened, and the efficiency is increased.

The invention discloses a semi-submergible breeding net cage, and particularly relates to an anchor type self-power semi-submergible breeding net cage which comprises a net cage frame and an anchoring mechanism. The anchoring mechanism is rigidly connected with the net cage frame, the net cage frame is of a triangular prism-cuboid-triangular prism pieced octahedron structure, netting is laid on side vertical surfaces and the lower bottom surface of the net cage frame, mechanisms are arranged on the side vertical surfaces of the net cage frame, the netting can be conveniently collected and pulled by constructors by the aid of the mechanisms, S-shaped blades which can rotate under impact effects of sea current are mounted on two pairs of side vertical surfaces in current facing directions, and a power generator set for converting kinetic energy generated by the S-shaped blades into electric energy is mounted on the net cage frame. The anchor type self-power semi-submergible breeding net cage has the advantages that the 'wind-wave resistance of the anchor type self-power semi-submergible breeding net cage can be enhanced'; the anchor type self-power semi-submergible breeding net cage is high in sea current resistance and wind-wave impact resistance and long in service life; the breeding level of bred objects such as fish and shrimps can be upgraded by the anchor type self-power semi-submergible breeding net cage.

The invention relates to a method for extracting pectin from pineapple peels assisted by ultrasonic waves, which is characterized by comprising the following steps of: carrying out processing procedures of washing, boiling, rinsing, pressing and dewatering and the like on discarded pineapple peels, mixing with a water solution with the pH value of 1.0-6.0 and placing into an ultrasonic wave container, controlling a material liquid ratio to be 1:3-30 and the temperature to be 25-100 DEG C, and reacting under the action of ultrasonic wave radiations with frequency of 20-40 kHz; and after completing the reaction, carrying out processes of decoloring through active carbon, concentrating, ethanol-precipitating and vacuum drying and the like to obtain the pectin. The invention can shorten the extraction time of the pectin through the impact effect of the ultrasonic wave on cell walls of the pineapple peels and improve the yield of the pectin.

The invention discloses an impact damage rock sample preparation and assay method based on an SHPB test and belongs to damage rock sample preparation and assay methods. The method comprises the steps that firstly, a cylindrical rock sample is manufactured, an SHPB device is used for conducting impact pre-damage on the cylindrical rock sample at an air pressure value lowered than the critical air pressure, corresponding stress waves are recorded, and the dynamic strain peak value, the strain rate peak value and the unit volume absorbing energy are acquired through calculation; secondly, the circle center of the end face of the rock sample serves as a center point, and axial drilling is conducted to form a cylindrical standard damage sample; thirdly, macro and microscomic testing of CT scanning, nuclear magnetic resonance, a longitudinal wave speed, a permeability coefficient, elasticity modulus, uniaxial compression strength and the like is conducted on the standard damage rock sample; fourthly, the same macro and microscomic testing is conducted on standard complete rock samples with the same rock character and physical parameters; fifthly, the dynamic damage degree of the impact to the rock material is quantitatively judged with the dynamic strain peak value, the strain rate peak value, the unit volume absorbing energy and other impact effect parameters as the bases by combining the data of the macro and microscomic testing. The method has the advantages that operation is easy, and the test data are comprehensive and reliable.

The invention provides a preparation method of a damping and energy absorbing material. The preparation method comprises the steps of uniformly mixing inorganic micro-nano particles and siloxane compounds, performing a mixed cross-linking reaction on an obtained mixture and boron compounds to obtain shear thickening gel, and mixing the shear thickening gel with an additive to prepare the damping and energy absorbing material. The damping and energy absorbing material can spontaneously change into a soft state from a hard state when being subjected to an impact effect, and energy can be absorbed during the process so as to effectively realize a protective effect.

The invention discloses a sliding cabin type multilevel damper equipped with power consumption and tuning particles for use in a building structure or a bridge structure, which belongs to the technical field of shock resistance and absorption and wind resistance in structure engineering. A damper cavity is in a rectangular or cylindrical shape; more than two damper cabin plates are arranged in the vertical direction of the damper cavity; a plurality of directional pulley supports are connected to the bottom surface of the damper cavity; the directional pulley supports can slide or roll in a sliding groove in a damper anchoring device; multilevel damper particle groups are placed uniformly in a single layer on each damper cabin plate; the multilevel damper particle groups are composed of major particles and fine particles; and the directional pulley supports can slide or roll on the sliding groove to enhance the impact effect of the damper particles by effect of wind and / or earthquake so as to tune structure frequency and dissipate kinetic energy of major structure.

The invention discloses a humanoid robot gait planning and synthesizing method, and belongs to the technical field of humanoid robot motion planning. The humanoid robot gait planning and synthesizing method comprises the following steps that a polynomial function is adopted to represent tracks of hip joints and the tail ends of swing legs of a robot, a one-foot support period gait and a double-feet support period gait are respectively planned when the robot walks according to constraint conditions including geometric constraints, maximum stride height of the tail end of each swing leg, gait periodicity, impact effect, hip joint motions and the like when the humanoid robot walks, then the planned gaits are synthesized, and whether obtained gait tracks are stable is judged according to a zero moment point criterion. According to the humanoid robot gait planning and synthesizing method, the one-foot support period gait and the double-feet support period gait of the robot are planned and synthesized into a complete gait, the problem that collisions between legs of the robot and ground affect walking stability when the robot walks is solved, walking stability of the robot is improved, and an important effect, of the double-feet support period gait of the robot, on a complete gait period is explained at the same time.

The invention discloses a microgrid and a stored energy dispatching method thereof. The microgrid mainly comprises a photovoltaic module, an inverter, a storage battery, a main network, a rotary load, a super capacitor, a variable frequency starting device and the like, wherein the photovoltaic module is connected onto an alternating current bus through the inverter; the super capacitor is connected onto the alternating current bus after being converted into alternating current through the inverter; and an energy storage battery is connected onto the alternating current bus through the inverter. According to the method, a stored energy operation mode is adjusted according to the state of the microgrid; when the rotary load is started, the super capacitor is adopted to discharge to balance photovoltaic power generation and loading; during the operation process of the rotary load, the super capacitor is preferentially adopted to output power, the discharge of the super capacitor is ended, and the energy storage battery outputs power. According to the microgrid and the stored energy dispatching method thereof disclosed by the invention, the problems that an impact effect is generated to the microgrid when the rotary load is started and the power supply reliability is low are solved; clean and renewable energy sources are fully utilized, and moreover, the waste of the clean and renewable energy sources is avoided; and the overall service life of the microgrid is prolonged while the power supply reliability of a user is guaranteed.

The invention discloses a technique method for filling spot welding stainless steel high-entropy alloy powder and for filling spot welding stainless steel with high-entropy alloy powder. According to the technique method for filling the spot welding stainless steel high-entropy alloy powder and for filling the spot welding stainless steel with the high-entropy alloy powder, the high-entropy alloy powder is mainly composed of AlFeCuCoNiTiCrx, wherein the x is molar ratio of the Al to the Cr and is between 0 to 0.3, and the size of the powder is 100-300 meshes. When high-entropy alloy powder media are used as a filling layer, the contact resistance of a stainless steel material which are different to weld at the early welding stage is improved, resistance heat is used as a welding heat source, partial melting of the surface of the material to be welded is achieved under the protection of protective air and under the action of the resistance heat, an oxidation film can be broken under the impact effect of proper electrode pressure, refining of the high-entropy alloy powder media can be achieved on the interface of the material to be welded, a molten core and a single face-centered cubic tissue are formed on the interface, and then the strength and the corrosion resistance of a connector are improved. The technique method for filling the spot welding stainless steel high-entropy alloy powder and for filling the spot welding stainless steel with the high-entropy alloy powder has the advantages that welding can be achieved under the thermal compensation condition, the flexibility is strong, and ideal engineering significance is achieved.

A pivot-action damper which for example dampens the impact effect of the closing movement of doors, furniture doors or flaps displays excellent braking force or damping force, even over small angular regions as a result of an outer cylindrical body which encompasses an inner body which is pivotable in relation to said outer cylindrical body. Between the two bodies there are two chambers, separated from each other by a gap or a throttle position, with said chambers containing a liquid. This liquid is displaced from one chamber to the other as a result of the rotation of the two bodies in relation to each other.