98results about How to "Reduce pressure peaks" patented technology

The invention discloses a mixed inflatable film structure in the technical field of building structures. The mixed inflatable film structure comprises an integral supporting film structure, an air bearing film, a film fixing edge, a boot pad, a supporting inflation system and a wrapping inflation system; the integral supporting film structure is fixed on the ground through the boot pad; the air bearing film is wrapped on the integral supporting film structure and fixed on the ground through the film fixing edge; and the integral supporting film structure and the air bearing film are connected with the supporting inflation system and the wrapping inflation system respectively. The mixed inflatable film structure is high in span, high in wind resistance, light and convenient to assemble and disassemble, can be used for a medium or large-span roof structure, and is suitable for multiple flat vertical building space layouts.

The invention discloses a suspend dome structure multi-prestressed construction method used in construction field. The construction method is that: firstly, a central pressure ring, an upper radial bar and edge elements are arranged on an upper layer; secondly, a lower radial rope, a lower ring rope and a strut are arranged on a lower layer; thirdly, prestress is applied in the structure by stretching the lower ring rope or stretching the lower radial rope or adjusting the length of the strut; fourthly, a ring bar is arranged; fifthly, an external load is applied on the structure. Compared with the structure formed by a traditional method, the suspend dome structure formed by the invention reduces peak pressure of elements with concise force, even changes a part of elements from a pressure bar to a tension bar, avoids instability of elements, at the same time enhances the entire stability of the whole structure and enlarges the ultimate bearing capacity. Furthermore, the invention leads a more even distribution of internal force of the upper layer network shell bar elements, is helpful to the unity of the elements and convenient for design and construction, at the same time, the invention reduces the applied prestress value and reduces construction difficulty.

The invention relates to a self-aligning spherical plain water lubricated tail bearing for ships. The tail bearing is provided with two rubbing pairs, wherein an inner ring (9) and an outer ring (4) are a rubbing pair in spherical contact and are lubricated by grease; the inner ring (9) is provided with linings (7) and is fixedly connected with the linings; the linings (7) and a tail shaft (8) are a rubbing pair and are lubricated by water; and when the tail shaft (8) runs in the linings (7), the inner ring (9) automatically regulates the axis of the bearing along with the shift of the tail shaft (8) to ensure the requirement for coaxiality of the tail shaft (8) and the tail bearing and uniform distribution of pressure on the linings (7). The invention has the function of regulating the coaxiality of the tail bearing and the tail shaft automatically, enables the bearing to endure greater radial force, has simple structure, can avoid edge effect effectively, enables the pressure peak value to descend, and can lead overall distribution of the pressure to tend to be uniform.

The invention relates to a device for reducing pressure pulsations caused in a hydraulic system, especially by a pump. Said device comprises a compensation volume (41) with a displaceable wall or membrane (39) that is located in said volume and that shuts off the volume. On one side, said wall or membrane is impinged upon with pulsations and on the opposite side with a counter-pressure which corresponds to at least approximately the average pressure of the hydraulic system. The pressure compensation volume (43) that is applied on the opposite side of the wall or membrane (39) is linked with the hydraulic system via a compensation manifold (51), said manifold (51) opening into the hydraulic system downstream of the compensation volume (41) in the direction of propagation of the pulsations.

The invention provides an air buffer device used for eliminating underwater near-distance explosion shock waves. The air buffer device comprises a counterweight, a gas ejector pipe, a maze type bubble channel and a flexible gasbag, wherein both the lower end and the upper end of the maze type bubble channel are open; the lower end of the maze type bubble channel is fixedly arranged on the gas ejector pipe, and the upper portion of the maze type bubble channel is connected with the flexible gasbag; the gas ejector pipe is connected with the counterweight; a gas ejecting hole of the gas ejector pipe is positioned inside the maze type bubble channel; and floating force, generated in water, of the flexible gasbag is greater than gravity, borne in water, of the maze type bubble channel. According to the air buffer device provided by the invention, air buffers which are staggered front and rear are formed in the vertical direction, and sudden change of wave impedance between an air medium and a surrounding water medium is utilized, so that a pressure peak value of shock waves can be attenuated by 90% or more, and therefore, safety of nearby hydraulic structures and other protected targets is protected, and the air buffer device has the advantages of being good in energy dissipation effect, energy-saving, environmentally friendly, and the like.

A thermoelectric module (13), for converting thermal energy into electric energy, includes a plurality of leg pairs (26), which have each a p-doped semiconductor leg (27) and an n-doped semiconductor leg (28), which are contacted with one another electrically via metal bridges (29). At least one electrically insulating ceramic plate (30), which is arranged on a hot side (18) of the thermoelectric module (13) or on a cold side (19) of the thermoelectric module (13) and is flatly in contact with metal bridges (29) associated with this side (18, 19) and is fastened thereto. The pressure stability of the thermoelectric module (13) can be improved if the respective ceramic plate (30) is segmented, so that a plurality of ceramic plate segments (31) are arranged next to each other, which are each flatly in contact with a plurality of metal bridges (29) and are fastened thereto.

A device for damping pressure pulses, in particular in a pressure sensor. The pressure sensor includes a housing. A damping insert, on whose peripheral surface runs a damping channel, is located in the pressure channel of the housing.

A tensioning device (10) for a seat belt, in particular in a motor vehicle, having a gas generator (17) and a piston (21) guided in a tube (16) that closes a pressure space (20) in the tube (16), whereas the pressure space (20) can be pressurized by the gas generator (17), as a result of which the piston (21) can be driven to perform a tensioning operation which can be transmitted to the seat belt by means of the force transmission means. The piston (21) having a closed or constricted opening (1, 1a), and the opening (1, 1a) can be enlarged and / or opened by the material erosion caused by the pressure and / or pressure conditions in the pressure space (20).

The invention provides a compact type fully hydraulic walking pile-up valve comprising a valve body. The valve body is internally provided with a high pressure selector valve formed by combining a threaded check valve base, a steel ball and a valve hole in the valve body. A first one-way throttle valve is arranged in the valve body and on the left side of the high pressure selector valve and a second one-way throttle valve is arranged in the valve body and on the right side of the high pressure selector valve. A balance valve is installed in a balance valve cavity of the valve body. A two-stage buffer overload valve comprising a first buffer overload valve and a second buffer overload valve is arranged on a main oil way in the valve body. A large-opening diameter oil supplementing valve formed by combining two sets of planar large-drift diameter check valves is installed in a valve cavity in the valve body and above the balance valve. An oil path switching valve is installed in the uppermost switching valve cavity of the valve body. The compact type fully hydraulic walking pile-up valve can effectively solve the problems such as great hydraulic shock, air suction of oil liquid and high noise in a braking process of fully hydraulic wheel excavators and loaders, has the advantages of compact structure, small size and high integration degree and is especially suitable for moving apparatuses.

The invention provides a time sequence design method of solid carrier rocket stage separation. The time sequence design method comprises the following steps that after sending an ignition signal, an upper stage engine sends an unlocking signal to a stage connecting structure between the upper stage engine and a lower stage engine at a preset time interval, wherein the preset time is 10 ms-100 ms.According to the time sequence design method of solid carrier rocket stage separation, the function of stage thermal separation in a pressure building up mode is ensured to be realized, the peak values of the pressure, the temperature and the impact force of a stage zone during stage thermal separation in a pressure building up mode can be effectively reduced, the flight safety of a solid carrierrocket is effectively improved, and the carrying capacity is improved.

The invention provides an eccentric impeller pump. The eccentric impeller pump comprises 1, a stator which comprises an inner wall for spacing an inner space, 2, a rotor which is arranged in the inner space, can space a rotation axis and comprises an outer wall forming a gap with the inner wall of the stator, wherein the gap comprises multiple sample quasi-crescent gap parts uniformly distributed at intervals along a peripheral direction around the rotation axis, 3, two end covers, 4, multiple blades which are respectively arranged in corresponding blade slots extending from the outer wall of the rotor to inside and are retractable, and 5, multiple oil inlet tanks and multiple oil outlet tanks which are arranged on the end covers, wherein each one of the gap parts is corresponding to one oil inlet tank and one oil outlet tank, at least one of the oil inlet tanks and other oil inlet tanks are non-uniformly arranged at intervals around the center of the rotation axis of the rotor and at least one of the oil outlet tanks and other oil outlet tanks are non-uniformly arranged at intervals.

The present invention relates to a system for forming a product from a food mass, the system comprising a mould member, e.g. a mould drum with an axis of rotation and a feed pump.

A piston for a pretensioner device (10) for a motor vehicle seat belt system of a type having a gas generator (17) with the piston (21) guided in a tube (16) that closes a pressure space (20) in the tube (16). The pressure space (20) can be pressurized by the gas generator (17), driving the piston (21) to undergo pretensioning operation transmitted to the seat belt system by a force transmission means. The piston has a dome shaped front side adapted to engage a force transmission element and a skirt forming a sealing lip oriented toward the pressure space. At least one slot is formed in the outer surface of the piston extending axially from the sealing lip. The slot can be enlarged by the material erosion caused by the pressure and / or pressure conditions in the pressure space produced by gas from the gas generator.

A device for damping pressure pulses, in particular in a pressure sensor. The pressure sensor includes a housing. A damping insert, on whose peripheral surface runs a damping channel, is located in the pressure channel of the housing.

The invention discloses a shock-resistance valve. A valve body of the shock-resistance valve is provided with an oil inlet, an oil return opening and a feedback oil opening; a valve chamber of the shock-resistance valve is provided with a regulating valve plug internally which controls the connection and disconnection of the oil inlet and the oil return opening; the valve chamber comprises a left chamber and a right chamber which are formed by the separation of the regulating valve plug; the oil inlet is communicated with the left chamber; the feedback oil opening is communicated with the right chamber; and an elastic component is arranged between the regulating valve plug and the axial chamber wall of the right chamber. The oil inlet of the shock-resistance valve is communicated with a main oil way; the feedback oil opening is communicated with a feedback oil way; when the pressure of the main oil way is increased abruptly, the pressures which acts on two sides of the regulating valve plug are different, when the pressure difference exceeds a set value of a pressure-regulating spring, a communicated oil opening of the oil return opening and the oil inlet is opened, the hydraulic oil of the main oil way flows back the oil return tank from the oil return opening for unloading, thus the role of shock-resistance is played; and the shock-resistance valve is directly communicated with the main oil way, the pressure peak value of the main oil way can be timely cut down, and shock-resistance is realized timely. The invention also discloses a hydraulic system of a crane comprising the shock-resistance valve.

The invention relates to a mixture formation device for an internal combustion engine operated with a burnable gas, preferably compressed natural gas CNG. The mixture formation device comprises a combination of a quantity regulator, a gas mixer, a flow-guiding element for pressure recovery, and a connection possibility for exhaust gas recirculation of the internal combustion engine. The mixture formation device according to the invention can empty a gas tank to a comparatively low pressure of about 2 bar, an excellent mixture formation being achieved over the entire range of speed and load range of the internal combustion engine. According to the invention, such a mixture formation device can reduce production costs as well as space requirements compared to known solutions. The invention also relates to an internal combustion engine operated with a burnable gas, particularly compressed natural gas (CNG), comprising such a mixture formation device in the intake tract thereof.

The invention discloses a damping balance valve. The damping balance valve comprises a valve body with a balance valve core group, wherein the balance valve core group is provided with a damper; an one-way throttle valve combination which has a buffering function so as to improve the action smoothness of the balance valve core group and is provided with a dismountable damper is mounted in the valve body; the one-way throttle valve combination with the dismountable damper consists of two one-way throttle valves with dismountable dampers, which are mounted in the valve body in a symmetrical manner; in the valve body, a hole is drilled downwards in the upper end of a left end surface relatively close to the valve body, so that a channel A used as a main working oil channel extending downwards is formed; a hole is drilled downwards in the upper end of a right end surface relatively close to the valve body, so that a channel B used as a main working oil channel extending downwards is formed; a channel C which extends upwards and is used as a main control oil channel, and a channel D which extends upwards and is used as a main control oil channel are symmetrically formed in a punching manner in the left side and the right side of the center line in the valve body; a balance valve cavity penetrating through the channel A, the channel C, the channel D and the channel B sequentially is horizontally formed in the left end surface of the valve body. The damping balance valve is simple in structure and high-efficient in performance, and can effectively weaken the pressure peak generated by hydraulic pressure fluctuation, so that the whole system can stably run.

The invention relates to a compressor system (10) comprising a compressor (12) for supplying compressed air to a utility vehicle (14) that has a driving engine (18) with a turbocharger (16). Air that is pre-compressed by the turbocharger (16) can be sucked in by the compressor (12) via a first air supply pipe (20). According to the invention, ambient air that is not pre-compressed can be sucked in by the compressor (12) via a second air supply pipe (12). The invention further relates to a method for controlling a compressor system (10) comprising a compressor (12) for supplying compressed air to a utility vehicle (14) that has a driving engine (18) with a turbocharger (16).

Proposed is a method for controlling and regulating an internal combustion engine (1), in which the rail pressure (pCR) is controlled via a suction throttle (4) on the low pressure side as a first pressure-adjusting element in a rail pressure control loop. The invention is characterized in that a rail pressure disturbance variable (VDRV) is generated in order to influence the rail pressure (pCR) via a pressure control valve (12) on the high pressure side as a second pressure-adjusting element, by means of which fuel is redirected in a controlled manner from the rail (6) into a fuel tank (2), the rail pressure disturbance variable (VDRV) being calculated using a corrected target volume flow (Vk(SL)) of the pressure control valve (12).

The invention belongs to the technical field of automobile engine lubrication, particularly relates to a pressure stabilizing filter. The filter is internally provided with a filtering chamber which is filled with filter elements; and the side of the filtering chamber is provided with a pressure stabilizing chamber for adjusting pressure. In the technical scheme, the filter is internally with the pressure stabilizing chamber which plays a role of stabilizing pressure and storing pressure in a whole lubricating system, and the pressure stabilizing chamber can adjust the pressure of the whole lubricating system, reduce the pressure peak value in the lubricating system and continuously supply oil for a turbocharger when an engine shut down suddenly, thereby achieving the goal of protecting the turbocharger.

The invention relates to a hydraulic system, comprising a pump for delivering a hydraulic fluid from a suction side to a pressure side, wherein an accumulator is disposed on the pressure side, wherein a hydraulic control valve is disposed between the pump and the accumulator, the valve having at least two valve positions, wherein the pressure side of the pump is connected to the accumulator in a first valve position and is separated from the accumulator in a second valve position, wherein the pressure side of the pump is connected to the suction side in a second valve position via the controlvalve, and a baffle is disposed between the outlet on the pressure side and a second return surface of the control valve.

The invention provides a method for determining a roll shape curve of a CVC rolling mill supporting roll with parabolic chamfers, and relates to the technical field of plate and strip rolling. The method comprises the steps: setting a roll shape curve equation of the CVC rolling mill supporting roll, and determining the preset sizes of chamfers of the operation side and the transmission side of the CVC rolling mill supporting roll according to the value range of the chamfer size of the end of the CVC rolling mill supporting roll; determining parabolic chamfer curve equations of the operation side and the transmission side of the CVC rolling mill supporting roll; and finally, combining the chamfer curve equation of the operation side and the transmission side of the back-up roll of the rolling mill with the roll shape curve equation of the back-up roll of the CVC rolling mill to obtain a target roll shape curve of the back-up roll. According to the method, the situation that the contactpressure distribution between the CVC rollers is not uniform is improved, so when the supporting roller with the parabola-shaped chamfer is matched with a working roller of a rolling mill for work, harmful contact is reduced, the phenomenon of edge stress concentration of the supporting roller is improved, uniform abrasion of the rollers is achieved, and the service life of the rollers is remarkably prolonged.

The invention relates to a device for sealing and inflating inflatable objects, in particular for sealing and inflating motor vehicle tyres. Said device comprises a compressor unit as a pressurized gas source, which is designed as a reciprocating piston compressor (10) driven by means of a thrust crank gear. Said reciprocating piston compressor is provided with a variable dead volume of air (9), the content thereof can be varied depending on the temperature of the cylinder head (11).

The cylinder / piston unit for a counterforce ram or vee ring of a fineblanking or stamping press equipped with at least one tool is continuously maintained at a preadjustable cushion pressure (P1) and is then subjected to a preadjustable displacement pressure (P2) from a connectable high-pressure source, with said pressure being set to a pressure (PU) varying between the cushion pressure (P1) and the pressure for forming or blanking by supplying a separate control oil quantity to a second accumulator via a central control unit, whereby a rise in pressure caused by the impact between the tool and the workpiece is regulated, independently of quantity of the control oil, from the pressure (P3) in the second accumulator to a permissible set pressure by discharging a significant part of the pressure pulse into a separate tank and the available cushion pressure allows ejection of the workpiece to be synchronized with retraction of the press ram.

The invention discloses organic matter processing equipment with high sealing performance. The organic matter processing equipment comprises a feeding device, a separator, a cover opening device and a pressure increasing and releasing device which is installed inside the separator. The separator conducts gas-solid separation on processed materials. The feeding device and the cover opening device are both arranged at the upper portion of the pressure increasing and releasing device, namely the top of the separator. The feeding device injects the materials into the pressure increasing and releasing device through the cover opening device. In the pressure increasing and releasing device, the material weight and steam outward pressure are borne by an upper cylinder barrel, an air cylinder is only used for supporting and pushing a lower cylinder barrel, and the requirement for thrust of the supporting air cylinder is lowered; and meanwhile a half-hidden type sealing structure is adopted, materials are directly prevented from making contact with the sealing position in the discharging process, the service life of a sealing piece is prolonged, and the reliability of the sealing piece is improved.

The pipe fitting comprises a plastic body (2) and a reinforcement ring (3) around the outside of the plastic body (2). The reinforcement ring (3) holds the body expansion under control. The reinforcement ring (3) is positioned at the distance (d) from the front end of the pipe fitting (1).

A tamping assembly (1) for a track tamping machine is proposed comprising tamping tool pairs (3), which are arranged on a girder (7) guided vertically adjustable in a tamping assembly frame and are formed as swing arms, and the lower tamping pick ends (10) of which intended for plunging into a ballast bed (4) are drivable using an oscillation drive and are hydraulically closable toward one another, wherein a hydraulic cylinder (11) and possibly a distance sensor (7) for determining the hydraulic cylinder position are associated with each of the tamping tools (3) of a tamping tool pair, and the hydraulic cylinders (11) form both the linear closing drive and also the oscillation drive of the tamping tools (3), and wherein electrohydraulic valves (25) are provided for actuation of the hydraulic cylinders (11), which comprise a mechanical hydraulic cylinder actuation valve part (12) and an associated valve electronic unit (13). To provide advantageous construction conditions, it is proposed that the valve electronic unit (13) is mounted in a vibration-damped manner by means of vibration dampers (D) with respect to the hydraulic cylinder (11) and / or the mechanical hydraulic cylinder actuation valve part (12).

The pipe fitting comprises a plastic body (2) and a reinforcement ring (3) around the outside of the plastic body (2). The reinforcement ring (3) holds the body expansion under control. The reinforcement ring (3) is positioned at the distance (d) from the front end of the pipe fitting (1).

The invention discloses a buffer oil cylinder, which relates to the technical field of hydraulic oil cylinders. It includes a cylinder body. A piston separates the inner cavity of the cylinder into a rod chamber and a rodless chamber. The rodless chamber communicates with an oil port. The piston is provided with a buffer column The buffer cavity of the plug, the buffer plunger is provided with an axial through hole, and an elastic member is arranged in the piston to make the buffer plunger protrude from the piston, and a small hole connecting the rodless cavity and the axial through hole is opened on the buffer plunger. The piston is fixed with a guide ring that slides with the buffer plunger; the piston is provided with a check valve and a drainage hole connecting the check valve and the buffer chamber; when the buffer cylinder starts, a part of the hydraulic oil passes through the oil port, the buffer plunger shaft The other part enters the rodless cavity through the through hole, the drainage hole and the one-way valve, and the other part enters the rodless cavity through the small hole; during the buffering process of the buffer cylinder, the hydraulic oil in the rodless cavity passes through the small hole and the axial direction of the buffer plunger. Oil return through holes and ports. The invention can start quickly, and the pressure transitions smoothly during the buffering process, reduces the peak value of the buffering pressure, and improves the service life of the oil cylinder.

A combustion system of IC engine for decreasing the pressure raising rate in cylinder and lowering the maximal explosion pressure features that a pressure accumulating chamber controlled by valve is arranged in cylinder cover. When the explosion pressure is suddenly increased, the pressure accumulating chamber is opened to suppress the maximal explosion pressure. Its advantages are high compression ratio, combustion efficiency and output power, and low oil consumption and noise.