5results about How to "Increase back pressure" patented technology

The utility model provides a kind of exhaust pipe.The exhaust pipe is used to make the exhaust from the engine of car flow, adopt the double-layer pipe structure of inner tube insertion in the inner diameter side of outer tube, sleeve is provided in the upstream side of exhaust flow direction in the inner tube, the sleeve is configured as the shape of gradually reducing diameter from the upstream side of exhaust flow direction to downstream side.Based on the structure, in the case of installing sensor in double-layer pipe structure part, without reducing the pipe diameter of double-layer pipe structure part, exhaust can be more easily contacted to sensor, and back pressure will not be caused to rise.

The utility model provides piston type pressure transmission equipment, which belongs to the field of pressure transmission, and comprises a piston cylinder, an auxiliary backpressure supplementing component for pressing double-end-face sealing is arranged outside the piston cylinder, and a liquid supplementing component for providing spacer liquid for the piston cylinder is arranged on one side of the piston cylinder. According to the double-end-face sealing device, stable back pressure is provided for double-end-face sealing through the arranged auxiliary back pressure supplementing assembly and the work of the piston cylinder, when the system pressure changes, the movable plug in the piston cylinder can correspondingly move according to the pressure change, and therefore the back pressure is adjusted, it is guaranteed that the sealing plate keeps effective contact and lubrication all the time, and the service life of the sealing plate is prolonged. And when the pressure of the system is increased, the movable plug in the piston cylinder can rapidly move, and the back pressure is increased, so that the pressure balance between the sealing plate and the sealed medium is kept.

The utility model provides a kind of MEMS heat dissipation device, including MEMS heat dissipation chip, microchannel radiator of being attached to MEMS heat dissipation chip, the size of gas passage of microchannel radiator is micrometer level, and the heat dissipation surface of microchannel radiator is used to be attached to the surface of heat source.The utility model further provides corresponding electronic equipment.The MEMS heat dissipation device of the utility model combines MEMS heat dissipation chip with extremely high back pressure and low power consumption characteristics with specially designed microchannel radiator, overcomes the inherent high flow resistance of microchannel by the high back pressure capacity of MEMS, so that it is possible to realize efficient forced convection heat exchange in extremely small volume, thereby solving the efficient heat dissipation problem under extremely limited space.

The utility model relates to a cylinder assembly, pump body structure and compressor, cylinder assembly includes cylinder body, sliding block, the middle part of cylinder body is passed through its axial both ends and is provided with compression cavity, the inside wall of compression cavity is recessed and is formed with the sliding slot along the radial direction, the side of sliding slot away from compression cavity is spaced and is provided with the first cooperation part and the second cooperation part with the distance not equal with the center line of compression cavity along the axial direction, sliding block is slidably arranged in the sliding slot, the side surface of sliding block close to compression cavity is eccentric circular surface, the side of sliding block away from compression cavity is spaced and is provided with the first abutment of abutting with the first cooperation part and the second abutment of abutting with the second cooperation part along the axial direction, the utility model promotes the back pressure of sliding block through reducing the pressure of the end of sliding block and piston contact, and through the design of the first abutment and the second abutment of unequal length, prevent the adverse condition of reverse installation of sliding block, effectively solve the adverse phenomenon of "KATA" noise.

The application discloses a novel bidirectional balance valve, and belongs to the technical field of balance valves. The bidirectional balance valve comprises a valve body, two valve cavities are symmetrically arranged in the valve body, an overflow valve assembly and a one-way valve assembly are arranged in the valve cavities, the overflow valve assembly comprises a valve seat fixed on the valve body, a valve core movably arranged in the valve cavity and a pressure regulating spring arranged between the valve core and the valve seat, the one-way valve assembly comprises a one-way valve sleeve movably arranged in the valve cavity and a one-way valve spring connected between the one-way valve sleeve and the inner wall of the valve cavity, a front section of the valve seat is located at the communication position of a V oil port and the valve cavity, and a throttling oil hole in communication with the V oil port is arranged on the outer circumferential surface of the end of the front section of the valve seat, which is away from the middle section of the valve seat. The application can effectively reduce load vibration, effectively improve micro-control performance, better match different flow load requirements, improve working stability and safety, and reduce the machining and manufacturing difficulty of the balance valve by adopting a large-diameter small-passage.