125results about How to "Reduce impact speed" patented technology

A pile driving control apparatus for a pile driving system includes a hydraulic control system that controls a throttle of a pile driving hammer, and thereby controls an impact velocity of the hammer with a pile. A controller provides a control signal to the hydraulic control system. Based on the control signal, the hydraulic control system controls an impact velocity of the hammer during a subsequent hammer stroke. The controller may determine one or more control parameters such as sound pressure at a sound control location during a hammer stroke, vibration at a vibration control location during a hammer stroke, an impact force imparted to the pile during a hammer stroke, and / or actual pile capacity of the pile, and provide to the hydraulic control system a control signal based on the determined control parameter(s).

A vehicle pre-impact sensing and control system generates tailored adaptive warning signals as a function of driver vehicle use. The tailored signals are used in a vehicle controller for determining appropriate driver warning or safety device activations.

A bullet includes a frontward facing aperture. Contained within the aperture is a relatively hard bullet frontal element that provides advantageous bullet impact performance. In one embodiment, the frontal element is a steel sphere that provides advantageous penetration and weight retention when the bullet impacts laminated glass, such as an automobile windshield.

The cutting machine comprises at least one path for the products to be cut (L); at least one device (3, 5, 9) for feed of the products along said path, according to a direction of feed (fL); an element (17) rotating around a main axis of rotation (A-A); on said rotating element, at least one disk-shaped blade (19A, 19B, 19C) rotating around its own axis of rotation (B-B), said blade being provided with alternate translatory motion, substantially parallel to the direction of feed. The disk-shaped blades moves axially in relation to the rotating element during rotation of said rotating element. Moreover, the translatory movement of the disk-shaped blade is controlled so that it moves in the same direction as the direction of feed of the products to be cut when the blade is engaged in said products to follow the feed of the products during cutting. Motion in the opposite direction to the direction of feed of the products is imparted on the blade in a period of time in which the blade is disengaged from said products.

The present disclosure provides an engine having a gas exchange valve and an actuator for the gas exchange valve, and also a method of reducing valve seating impact velocity. The actuator includes a body having a fluid inlet and a fluid outlet. A plunger is reciprocable in the body and has a travel distance between an advanced position and a retracted position, the plunger and body defining a chamber. A flow restriction orifice is disposed in at least one of the plunger and the body, and the chamber is in unrestricted fluid communication with the outlet over a first portion of the travel distance and in restricted fluid communication with the outlet by way of the orifice over at least a second portion of the travel distance.

A munition is described including a reactive fragment having an energetic material having a least one layer of a reducing metal or metal hydride and at least one layer of a metal oxide dispersed in a binder material. A method is also described including forming a energetic material; including combining the energetic material having a least one layer of a reducing metal or metal hydride and at least one layer of a metal oxide with a polymeric binder material to form a mixture; and shaping the mixture to form a reactive fragment. The munition may be in the form of a warhead, and the reactive fragment may be contained within a casing of the warhead.

A bat for limiting the maximum barrel response at high impact speeds while minimizing the dampening performance at low impact speeds includes a plurality of separate longitudinal beams extending from the end of the bat to the tapered portion of the bat. These beams, as well as the tapered portion and a handle, are constructed from a composite material, such as fiber reinforced plastic. An external sleeve is then provided around the barrel portion of the bat. The external sleeve is secured around the barrel of the bat using a snap-fit end cap.

The invention relates to a dynamic reliable control strategy of a high-capacity contactor. The dynamic reliable control strategy comprises the following steps of: by adopting a current closed loop as a basic inner loop, controlling the current inner loop by adopting a slope outer loop in a starting process, lowering the collision speed of a movable iron core, and reducing bounce of a contact terminal in the starting process; during a maintaining process, monitoring the outer loop by adopting error breaking, predicting an error breaking fault of the contactor, and taking a measure in time to prevent the error breaking; and during a breaking process, controlling the breaking speed of the movable iron core, so that not only can the rapid breaking of the contactor be guaranteed, but also the burning of the contact terminal caused by breaking electric arc is reduced, and the impact on a contactor framework during the breaking process is also reduced.

The present disclosure provides an engine having a gas exchange valve and an actuator for the gas exchange valve, and also a method of reducing valve seating impact velocity. The actuator includes a body having a fluid inlet and a fluid outlet. A plunger is reciprocable in the body and has a travel distance between an advanced position and a retracted position, the plunger and body defining a chamber. A flow restriction orifice is disposed in at least one of the plunger and the body, and the chamber is in unrestricted fluid communication with the outlet over a first portion of the travel distance and in restricted fluid communication with the outlet by way of the orifice over at least a second portion of the travel distance.

A bullet includes a frontward facing aperture. Contained within the aperture is a relatively hard bullet frontal element that provides advantageous bullet impact performance. In one embodiment, the frontal element is a steel sphere that provides advantageous penetration and weight retention when the bullet impacts laminated glass., such as an automobile windshield.

An elevator installation is provided. The installation includes a shaft in which at least two cars are arranged above one another and are movable vertically separately. Each car has a drive device and a brake device. A safety device is provided for monitoring the cars. At least one travel path limiting device is provided, comprising at least one stop element arranged on at least a first car and an associated retaining element arranged in the shaft. In a stop position, the stop element protrudes laterally from the car and interacts with the associated retaining element. All other cars movable in the shaft may pass this retaining element unobstructed. The brake device or its braking action is deactivatable if the car falls below a limit speed, and the stop and retaining elements may brake the car to a standstill at speeds up to at most the limit speed.

The invention discloses a weight-adjustable impact device, which is mainly used for performing a mechanical impact test on a product. Raised by a certain impact height, an impact hammer impacts or acts on an impacted object. A vertical guide rail is arranged on both sides of a T-shaped cage of the impact hammer so as to move the impact hammer up and down; a group of weight sets is fixed on the cage through an upright post and a lock nut; and the impact hammer is elevated through actuation of an electromagnet on the impact hammer and released by electric power shutdown so as to finish an impact action.

A method for regulating a fuel injection system of an internal combustion engine, wherein the fuel injection system includes a high-pressure pump which is associated with a quantity control valve having a solenoid valve electromagnetically operable by a coil for supplying fuel, the quantity control valve regulating the fuel quantity pumped by the high pressure pump and the coil of the solenoid valve being energized according to a setpoint current value in order to close the valve for supplying fuel to the high-pressure pump; when the solenoid valve closes, the setpoint current value is reduced from a first current setpoint value to a second current setpoint value so that an emission of audible noise generated when the solenoid valve closes during operation of the internal combustion engine is at least partially reduced.

The invention provides a designing method of a fish-friendly axial flow pump based on fish survival rate prediction. A relation between a pump design parameter and the fish passing survival rate is predicted by adopting a mathematical model, and thus a fish-friendly design of an axial flow pump is guided. The mathematical model is mainly composed of the blade leading edge impact probability and the impact death rate; the impact probability is a ratio of the time that fishes pass through the cross section of passage of the blade leading edge and the time needed by an impeller rotating around a blade pitch; the impact death rate is relevant to the impact velocity, the fish length and the thickness of the blade leading edge; and the impact velocity adoptsa velocity component of a vertical leading edge. The fish-friendly axial flow pump design comprises the following steps: lowering the blade leading edge impact probability by adopting two blade impellers, lowering the impact death rate by adopting the blade leading edge with linear sweepforward protraction, and ensuring good hydraulic performance by virtue of airfoil parameter design. According to the designing method, a fish survival rate prediction model is high in goodness of fit to an experiment value, and the fish-friendly axial flow pump designed by guidance can greatly lower the fish death rate.

The invention discloses a stab-proof material, which comprises: an inner bag with a sandwich structure, the inner bag includes a first stab-proof layer, a second stab-proof layer and a buffer layer, the first stab-proof layer and the second stab-proof layer The anti-stab layers are respectively located on one side of the buffer layer. The anti-stab material of the present invention and the anti-stab clothing prepared by using the material have the functions of anti-stab, anti-impact and anti-blunt trauma, and at the same time, are light and portable, easy to disassemble, convenient to wear and high in comfort.

The invention discloses a PM2.5 (Particular Matter 2.5) single-grade atmosphere sampling cutter. The PM2.5 single-grade atmosphere sampling cutter is roughly cylindrical; the PM2.5 single-grade atmosphere sampling cutter comprises a cutting opening cover layer, an impacting nozzle layer, an impacting plate layer, a particular matter collecting layer, a gas organic pollutant collecting layer and a gas discharging layer, wherein the cutting opening cover layer, the impacting nozzle layer, the impacting plate layer, the particular matter collecting layer, the gas POPs (Persistent Organic Pollutants) collecting layer and the gas discharging layer are sequentially sealed and connected in series; the impacting nozzle layer comprises impacting nozzles and an impacting nozzle plate; the impacting nozzles are arrayed at an equal interval and are vertically inserted into the impacting nozzle plate to form an annular ring; the impacting nozzles are internally provided with reversed conical through holes; and the impacting plate layer is provided with an impacting plate and the impacting plate is an annular groove. With the adoption of the PM2.5 single-grade atmosphere sampling cutter disclosed by the invention, the characteristic that a previous air sampling device has middle and small flow is broken through; and a flow design standard of 300 L / min can meet the POPs sampling requirements so that the cutting grain diameter of the cutter is accurate and the target of accurately layering the target particular matters under the cutting of an inertia impacting force can be realized.

A bullet includes a frontward facing aperture. Contained within the aperture is a relatively hard bullet frontal element that provides advantageous bullet impact performance. In one embodiment, the frontal element is a steel sphere that provides advantageous penetration and weight retention when the bullet impacts laminated glass, such as an automobile windshield.

A munition is described including a reactive fragment having an energetic material having a least one layer of a reducing metal or metal hydride and at least one layer of a metal oxide dispersed in a binder material. A method is also described including forming a energetic material; including combining the energetic material having a least one layer of a reducing metal or metal hydride and at least one layer of a metal oxide with a polymeric binder material to form a mixture; and shaping the mixture to form a reactive fragment. The munition may be in the form of a warhead, and the reactive fragment may be contained within a casing of the warhead.

A fuel system including a high pressure fuel pump with a quite fuel metering valve is disclosed. In one example, the quite fuel metering valve may be cam driven. The fuel system may reduce engine noise and may provide operating modes that are different from other fuel systems.

The invention discloses a rotary compressor and a bearing component thereof. The bearing component comprises a bearing, a discharge valve plate, a lift limiter and an elastic piece, wherein an exhaust port is formed in the bearing, one end of the discharge valve plate is connected with the bearing, and the other end of the discharge valve plate covers the exhaust port; the lift limiter is arranged on the one side, away from the exhaust port, of the discharge valve plate, the elastic piece is arranged between the discharge valve plate and the lift limiter, and the part, corresponding to the exhaust port, of the elastic piece and the discharge valve plate are separated from each other. According to the bearing component, the bearing component is simple in structure. When the bearing component is applied in the rotary compressor, the falling back speed of the discharge valve plate is quickened under high-frequency revolving condition, the backflow of refrigerant gas is decreased, on the premise that the low-frequency energy efficiency of the rotary compressor is not lowered, the high-frequency energy efficiency is improved, the tremor of the discharge valve plate and the impact velocity of the discharge valve piece for the lift limiter are decreased by virtue of the bearing component, so that the running noise of the rotary compressor is lowered.

A filtration irrigation method, filtration irrigation device and the manufacturing method thereof, said filtration irrigation device comprises a water carrying chamber, in which one or more porous filter membranes are arranged. One or more flow restrictors corresponding to each membrane are set on the wall of the water carrying chamber. The total permeation capacity of the flow restrictors is less than that of said filter membranes. The present invention can avoid the blockage of the device effectively.

A process for manufacturing a vitreous slag includingrotating a cone about a vertical cone axis, the cone including an external shell having a lateral surface;cooling the lateral surface of the external shell;pouring molten slag onto the lateral surface of the cone to form a film of slag by gravity, which is solidified as it is entrained in rotation by the cone about the cone axis; anddetaching pieces of the film from the lateral surface and removing solidified slag in the form of the pieces after the film has been entrained through between 0.6 and 0.9 revolutions of the cone, the molten slag being poured onto the lateral surface in a pouring zone and spreads to form a film over substantially the entire length of the lateral surface, preferably over between 75% and 95% of the length of the lateral surface.

The invention discloses a pipeline mud conveying device. The pipeline mud conveying device comprises an outer pipeline, an inner pipeline concentric with the outer pipeline, and an air inlet formed in the outer pipeline, and a high-pressure air way is formed by a gap between the outer pipeline and the inner pipeline. A plurality of high-frequency vibrators are arranged in the high-pressure air way and located on the air inlet side. A high-pressure air hole communicating with the high-pressure air way is formed in the inner pipeline and located in the air inlet side. Each high-frequency vibrator comprises a pair of vibration supports, a vibrator shaft, a plurality of blades and a vibration steel ball arranged on the top of each blade through a vibration spring. The defects that during channel dredging work, the flowing resistance of mud in the pipelines is large, hydraulic power along the way is reduced rapidly, consequently, a dredger mud conveying system pipeline is abraded and blocked, the conveying distance is short and energy consumption is high are overcome, and therefore the flowing resistance of the mud in the pipelines is reduced, and hydraulic losses of mud along the way are reduced.

The invention discloses an air condition compressor discharge valve plate limiter. The air condition compressor discharge valve plate limiter comprises a fixed part and a bending part, wherein one endof the fixed part is fixedly connected with one end of the bending part; the fixed part is of a surface plate structure; the bending part is of an arc-shaped plate-like structure; the upper surface of the other end of the bending part is provided with a lug; the upper surface of the lug is connected with an elastic buffer part; and the top of the elastic buffer part is connected with a carbon fiber ring component. The air condition compressor discharge valve plate limiter is practicable and has a reasonable structure, the stress condition can be greatly reduced under the condition of same contact area through the design of the carbon fiber ring component and the elastic buffer part structure, the contact area can be reduced effectively under the condition of same stress condition, the performance is greatly promoted, and the performance is greatly increased by compared with former products.

The invention discloses a road isolation fence for buffering and warning. Isolation pile, a warning lamp is mounted at the top of the isolation pile; two square grooves are symmetrically formed in theside wall of the isolation pile, an air bag is glued to the side wall of the isolation pile, an induction cavity is formed in the isolation pile, the induction cavity is communicated with the two square grooves, a storage box is fixedly arranged on the side, close to the induction cavity, of each square groove, and a circuit box is fixedly installed in the middle of the induction cavity. Rigid collision between a vehicle and the isolation pile is converted into elastic collision between the vehicle and the air bag when an accident occurs, so that the impact force between the vehicle and the air bag is reduced, the buffer to the vehicle is increased, the protection effect of the isolation pile is improved, and the isolation pile can be prevented from being seriously damaged; after collision, the warning lamps on the isolation piles automatically emit light and can be kept for a certain period of time, so that other drivers are reminded to avoid accident vehicles in time, and chain traffic accidents and rear-end collisions are reduced.

The invention discloses a reciprocating compressor valve set structure with a rapidly-opened-closed air discharge valve plate. The reciprocating compressor valve set structure comprises a valve plate, a plate top is provided with a valve seat, an air discharge hole is formed in the valve seat, a lift limiting device is arranged on the valve seat, and the air discharge valve plate is arranged between the lift limiting device and the valve seat and provided with the fixed end pressed by the lift limiting device and the movable end covering the air discharge hole; a spring piece is arranged between the air discharge valve plate and the valve seat, the pre-tightening force of the spring piece is in the opening direction of the air discharge valve plate, the spring piece is also provided with the fixed end and the movable end, and the fixed end of the spring piece is fixed still relative to the valve plate; the rigidity of the air discharge valve plate is not smaller than 600 N*mm<2>. The air discharge valve plate has the higher rigidity and can be easily and rapidly closed; the elasticity of the spring piece is provided in an assisted mode when the valve plate is opened, and the valve plate can be rapidly opened in an assisted mode. The air discharge valve plate is long in service life, low in impact noise, rapid in response and capable of serving as a component part of a reciprocating compressor valve set.

In a fuel injection system of an internal combustion engine fuel is delivered into a fuel rail by a high-pressure pump. The quantity of the delivered fuel is influenced by a quantity control valve operated by an electromagnetic operating device. At least one parameter of a braking pulse of the electromagnetic actuating device depends on an efficiency of the electromagnetic actuating device and / or on a supply voltage of a voltage source and / or on a temperature, in particular of a component of the fuel injection system or of the internal combustion engine.

The present invention generally relates to methods for increasing the lifetime of MEMS devices by reducing the landing velocity on switching by introducing gas into the cavity surrounding the switching element of the MEMS device. The gas is introduced using ion implantation into a cavity close to the cavity housing the switching element and connected to that cavity by a channel through which the gas can flow from one cavity to the other. The implantation energy is chosen to implant many of the atoms close to the inside roof and floor of the cavity so that on annealing those atoms diffuse into the cavity. The gas provides gas damping which reduces the kinetic energy of the switching MEMS device which then should have a longer lifetime.

The invention discloses a quick assembly type expressway multistage buffer guardrail. The quick assembly type expressway multistage buffer guardrail comprises a moving unit, a multi-stage guardrail main body unit and an intelligent control unit; the moving unit comprises a sliding rail and a positioning rail which are in parallel, wherein the positioning rail comprises a fixing rail formed by a plurality of intervals; the multi-stage guardrail main body unit is arranged in the sliding rail in a sliding mode; the multi-stage guardrail main body unit comprises a plurality of sub-guardrails; eachsub-guardrail comprises a middle protective plate, a buffer protective plate and a supporting unit; each buffer protective plate comprises outer protective plates, pushing mechanisms and an air bag;the air bag is arranged between the front end outer protective plate and the middle protective plate; the pushing mechanisms are symmetrically connected to the corners of the front end outer protective plate and the middle protective plate; the rear end outer protective plate is connected to the rear side of the middle protective plate in a vertically movable manner; and the intelligent control unit comprises a controller, a stress monitoring module and an impact guardrail track prediction module. According to the quick assembly type expressway multistage buffer guardrail of the invention, through multi-stage buffering, the collision speed of a vehicle is greatly reduced, and casualties and damage to the vehicle are reduced to the minimum.