97results 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 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 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.

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 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 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.

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).

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.

The invention discloses a water-hammer arresting position control valve without frequent movement, and a mounting method and a position control method thereof, and belongs to the field of water supplypipe network water pressure control. As the control end of the water-hammer arresting position control valve communicates with a highest water level and a lowest water level, the facts that a valve body is opened and water enters a water tank only when the water level in a water tank is lower than a water release pipe, the valve body is closed and water stops entering the water tank only when thewater level in the water tank is higher than the highest water level, and the valve body does not move when the water level is positioned between the lowest water level and the highest water level are ensured, frequent opening and closing of the valve body can be prevented during water level control, and impact to a valve structure by frequent movement of the valve is eliminated. The water-hammerarresting position control valve has the advantages that the service life is longer, the valve is more difficult to damage, meanwhile occurrence of a pipeline water hammer is avoided, and the valve is beneficial to the safety of pipeline water supply systems.