9results 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 invention relates to a dynamic and static pressure hybrid thrust bearing structure and a design method thereof, and the bearing structure, the bearing structure comprises a back plate, a plurality of fan-shaped bosses are uniformly distributed on the circumference of the front surface of the back plate at intervals, gaskets and bottom foils are arranged between two adjacent fan-shaped bosses, fan-shaped flat foils are arranged on the gaskets and the bottom foils, pressure equalizing grooves are formed in the fan-shaped bosses, the pressure equalizing grooves are arc-shaped grooves, and the arc-shaped flat foils are arranged on the back surface of the back plate. Air outlet holes are formed in the pressure equalizing groove and connected with air inlet holes through air supply flow channels, the air supply flow channels are located in the back plate, and the air inlet holes are located in the outer wall of the back plate; an exhaust passage is arranged in the back plate in the radial direction, one end of the exhaust passage is provided with an exhaust hole which is located in the inner wall of the back plate, and fixing threaded holes are formed in the back face of the back plate. The dynamic and static pressure hybrid bearing is of a multi-tile structure, and flexible foils and steps with air inlet holes are distributed in a staggered mode. The working back pressure of the bearing can be improved through external high-pressure air supply of the air inlet holes, the dynamic pressure effect is improved, abrasion of the bearing during starting and stopping is avoided, and therefore the bearing capacity and rigidity of the bearing are improved.

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 utility model discloses a kind of turbine exhaust comprehensive utilization devices of maintaining controllable pressure difference, including steam turbine, condenser, air ejector, circulating water pump and condensate pump, the steam outlet of steam turbine is communicated with the steam side entrance of external negative pressure difference type waste heat recovery device by a steam extraction pipe fitting, and the water side import and export of negative pressure difference type waste heat recovery device is connected with heat user side system.This utility model relates to the technical field of energy saving of thermal system, the turbine exhaust comprehensive utilization device of maintaining controllable pressure difference, by setting additional exhaust steam waste heat utilization pipeline and the heat exchanger of waste heat utilization at the exhaust steam outlet of steam turbine, and by controlling heat exchanger outlet flow and pipeline inlet flow and the flow of main pipeline are corrected, to ensure that back pressure is not too high, steam turbine normal operation is not affected.

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.

The application discloses a kind of hot plate steam quick drainage device, it is related to vulcanizing machine technical field, including: groove plate, heating groove is opened in the downside of the groove plate, the both ends of the heating groove are equipped with water inlet and drain respectively, and flow limiting structure is fixedly arranged in the drain;Cover plate, the cover plate is attached to the downside of the groove plate and is welded and fixed with the groove plate, the position of the cover plate corresponding the drain is equipped with water collecting hole, and the water collecting hole is communicated with heating groove;The flow limiting structure and water collecting hole cooperate to form self-adapting drainage channel.The application can quickly vertically upwardly discharge cooling water in upper hot plate by increasing flow limiting pipe and water collecting hole in the position of the drain of upper hot plate, and back pressure between water inlet and drain of upper hot plate is increased in the process of heating, so that the steam passing through heating groove stays longer in heating groove, heating is more uniform and sufficient, heat loss is reduced, and heating efficiency is improved.

The present invention relates to the technical field of sewage treatment, and provides an air supply aeration control system for sewage treatment, comprising: an air supply unit, a regulating unit, and an aeration unit, wherein the three units are arranged in sequence and the aeration unit is located in an aeration tank; a control unit, which is electrically connected to the above three units respectively; wherein the regulating unit is provided with a regulating valve, and the regulating valve comprises a streamlined valve seat, a streamlined valve core, a transmission mechanism and an actuator, wherein the streamlined valve seat has a throttling section, and the streamlined valve core has a linear regulating body; the actuator drives the streamlined valve core to move along the axial direction of the streamlined valve seat through the transmission mechanism, and can change the flow area between the linear regulating body and the throttling section to achieve the regulation of the air flow. Through the linear regulating body, the streamlined valve core can linearly regulate the flow within the opening range of 0 to 100%, and the valve flow and the valve core opening change are in a linear relationship, thereby avoiding the problem of poor adjustability under large opening conditions, and achieving precise and stable regulation of the aeration volume.