49results about How to "Reduce exhaust loss" patented technology

A two-stage electric control pneumatic supercharging system with an adjustable turbine bypass valve comprises a high pressure-stage turbocharger, a low pressure-stage turbocharger, a high pressure-stage intercooler, a low pressure-stage intercooler and an adjusting device. The high pressure-stage turbocharger and the low-pressure stage turbocharger comprise a high-pressure stage turbocharger and alow-pressure stage turbocharger which are connected in series, the high-pressure stage turbocharger comprises a high-pressure stage bypass valve turbine and a high-pressure stage air compressor, andthe low-pressure stage turbocharger comprises a low-pressure stage bypass valve turbine and a low-pressure stage air compressor; the high-low pressure stage intercooler is composed of a high-pressurestage compressor intercooler and a low-pressure stage compressor intercooler, and the adjusting device comprises a vacuum pump, an electromagnetic valve, a pneumatic actuator, a bypass valve and a connecting pipeline. According to the variable-altitude control method of the system, the variable-altitude full-working-condition supercharging pressure adjustment of the engine can be realized by controlling the opening degree and the opening and closing of each valve, utilizing the calibrated supercharging pressure and the air pressure MAP in a pneumatic actuator and adopting two modes of closed-loop feedback and open-loop feedforward for adjustment according to the working conditions of the engine.

Disclosed are a sliding vane compressor and an exhaust structure thereof. The exhaust structure of the sliding vane compressor includes: an exhaust hole, the exhaust hole being formed in a flange of the sliding vane compressor and being in communication with a compression cavity of a cylinder of the sliding vane compressor; a guide channel, the guide channel being formed on the flange and penetrating through the flange; and an exhaust channel, the exhaust channel being formed on an eccentric circle of the sliding vane compressor, and the exhaust channel being used for communicating the compression cavity with the guide channel using the rotation of the eccentric circle. The sliding vane compressor and the exhaust structure thereof have a small exhaust loss, thereby effectively reducing the power consumption and the production and manufacturing costs of the sliding vane compressor.

The invention relates to a heat collection and energy storage method of solar dual-cavity type metallic oxide particles and a device thereof. Focused sunlight enters into a light suction cavity of a dual-cavity type heat collection reactor to heat a separating plate surface and preheat the metallic oxide particles; the preheated metallic oxide particles enter into a reaction cavity; the metallic oxide particles are heated and reduced along the temperature raising to release oxygen; the released oxygen is output through a gas outlet of the reaction cavity; the reduced metallic oxide particles are output through a particle outlet of the reaction cavity; the reduced metallic oxide particles enter into a restored particle storage box, and then enter into an oxidation heat exchanger to react with the oxygen from the gas outlet of the reaction cavity to release stored chemical energy; the chemical energy is transmitted to a heated working substance; the oxidized metallic oxide particles enter into an oxidized particles storage box and then enter into a light suction cavity particle inlet through a particle conveying device, and air is led in from the environment so as to control the gas flow of the reactor and the reaction rate of the oxidation heat exchanger; the entered air exchanges heat with the residual gas in the oxidation heat exchanger in advance to improve efficiency.

A turbocharger-equipped engine comprises: an intake port (6) and an exhaust port (7), which are connected to a combustion chamber (5); a surge tank (12); and a turbocharger (21) having a turbine (24)located at a position along the length of an exhaust passage (13), the turbocharger (21) also having a compressor (22) rotating with the turbine (24). The turbocharger-equipped engine further comprises: a waste gate valve (26) for regulating the supercharging pressure of the turbocharger (21); a throttle valve (15) provided in an intake passage (17) between the compressor (22) and the surge tank (12); and a control device (14) for controlling the operation of both a control valve and the throttle valve (15). When the engine is operated in a full-load operation range, the control device (14) sets the maximum degree of opening of the throttle valve (15) to the degree of opening closer to the closed side than the degree of opening corresponding to a fully opened throttle position and controlsthe throttle valve (15) so that the compressor efficiency of the compressor (22) will be higher than compressor efficiency corresponding to the fully opened throttle position. The compressor has increased efficiency when the engine is operated in the full-load operation range, and the output of the engine is further increased.

The invention discloses an exhaust device of a rolling rotor compressor pump body, mainly comprising an air cylinder provided with a round pore passage, a bent valve plate, a lift limiter with steps, an air cylinder end cover with a stepped exhaust hole, and a gasket, wherein the valve plate, the gasket and the lift limiter are installed in the pore passage of the air cylinder; after the compressor is assembled, the upper end cover of the air cylinder, the lower end cover of the air cylinder and the shell of the compressor seal the pore channel on the air cylinder to form an exhaust space which takes an opened valve plate as an inlet and the stepped exhaust hole on the air cylinder end cover as an outlet. The exhaust device has the advantages of small exhaust loss, low exhaust noise and being easy in processing and assembly.

The application provides a pump body assembly, a compressor and an air conditioner. The pump body assembly includes a main shaft (1), a flange, a cylinder seat (9), a cylinder (3) and slides (4), the main shaft (1) includes a convex part (2), and a plurality of slides (4) along the circumference The flange, cylinder (3), sliding plate (4) and convex part (2) enclose a compression chamber (10), the cylinder (3) only rotates on its own, and the cylinder (3) corresponds to Each compression chamber (10) is provided with a first exhaust channel (7), the flange is provided with a second exhaust channel (8), and the first exhaust channel (7) is provided with a first exhaust channel (7). Passage (7) opens or closes the exhaust valve assembly (11). According to the pump body assembly of the present application, sudden changes in the exhaust speed can be effectively avoided, the frequency of opening and closing of the exhaust valve assembly can be reduced, and the reliability and stability of the operation of the compressor can be ensured.

The invention discloses reciprocating compressor valve block structure. It includes steeliness valve plate, exhaust valve plate, valve plate support, air suction valve plate, valve plate spacercy, cylinder cover, cylinder cover spacercy and elastic plate. The valve plate is plane. The exhaust valve plate and elastic valve plate are fixed on the valve plate. It has the advantages of good technology assurance and low air tight seal underline rate. This can improve clearance volume efficiency and compressor working efficiency.

The invention belongs to the technical field of engines, and relates to a lean-burn engine and an automobile. The lean-burn engine includes a water spray system and an electronic control unit; the water spray system includes an air passage sprinkler, a pressure sensor and a water supply device, and the air passage sprinkler It is connected to the water supply device through a water pipe, and the pressure sensor is used to detect the pressure value of the water pipe and send it to the electronic control unit. The sprinkler is connected to the pressure sensor signal. When the engine is in different working conditions, the pressure value of the water pipe changes, and the pressure sensor sends corresponding signals to the electronic control unit according to the different pressure values ​​of the water pipe, and the electronic control unit controls the airway sprinkler. Adjust the amount of water spray. In the lean-burn engine of the present application, the electronic control unit controls the airway water injector to adjust the water injection amount according to different engine working conditions (loads), so as to realize efficient and clean combustion of the engine.

The invention discloses a miniature turbofan engine separate exhausting device with a rectifier. The miniature turbofan engine separate exhausting device is located in the position of an exhausting outlet of a miniature turbofan engine and comprises an outer case, a turbine guider case, the rectifier, an intermediate case, an inner spray pipe and a center cone which are sequentially connected. The difference value between the shrinkage angle of the rectifier and the shrinkage angle of the inner spray pipe and the difference value between the shrinkage angle of the rectifier and the shrinkage angle of the rear section of the outer case both range from -5 degrees to 5 degrees. By the adoption of the miniature turbofan engine separate exhausting device, friction loss and viscosity loss caused in the exhausting process of the miniature turbofan engine can be greatly reduced; and in addition, the problem that a thread is difficultly machined on high-temperature alloy is solved, connection is convenient, and the structure is simple and feasible.

The invention provides a pump body assembly, a compressor and an air conditioner. The pump body assembly comprises a main shaft, a flange, air cylinders and sliding vanes, the main shaft comprises a convex part, the multiple sliding vanes are arranged on the convex part at intervals in the circumferential direction, compression cavities are defined by the flange, the air cylinders, the sliding vanes and the convex part, at least one radial exhaust channel is formed in the position, corresponding to each compression cavity, of the convex part, an axial exhaust channel is further formed in the main shaft and extends to the exterior of a matching area of the flange and the main shaft in the axial direction of the main shaft and communicates with the space outside the pump body assembly, the radial exhaust channel is internally provided with an exhaust valve assembly, and when the pressure of refrigerants in the compression cavities reaches the preset pressure, the exhaust valve assembly communicates with the compression cavities and the axial exhaust channel. According to the pump body assembly, the area of the exhaust channel can be unlimited, meanwhile, leakage in the compression process of the compressor can be effectively avoided, and the performance of the compressor is ensured.

The invention provides a secondary-secondary last-stage moving blade for a half-speed high-capacity nuclear turbine. The secondary-secondary last-stage moving blade comprises shroud rings, a blade work portion, a middle body and a blade root. The height of the blade work portion is 905 mm, the molded line is a variable-section twisted blade, the area of the section of the blade is gradually reduced along with increase of the height of the section of the blade, and relative twisting exists between two adjacent sections. The shroud rings are located at the top of the blade work portion. The blade root is located at the bottom of the blade work portion, and is a laterally-mounted, large-circular-bead and low-stress-concentration longitudinal tree-shaped blade root. The middle body is located between the blade work portion and the blade root, and the width of the middle body is identical to the axial width of the blade root. The shroud rings, the blade work portion, the middle body and the blade root are integrally formed. In a static state, a clearance between the work faces of two adjacent shroud rings is zero. The adjacent shroud rings at work rotating speed are coupled to enable the whole ring of the secondary-secondary last-stage moving blade to be connected into a set. The secondary-secondary last-stage moving blade can be suitable for an AP1000 and future CAP1400 / CAP1700 nuclear power steam turbine generator unit, and the requirement of the half-speed high-capacity nuclear turbine for aerodynamic performance and strength can be met well.

The invention provides a compressor, comprising: a crankshaft; a low-pressure cylinder and a high-pressure cylinder, the crankshaft is mounted on the low-pressure cylinder and the high-pressure cylinder, and the low-pressure cylinder is located on the side of the high-pressure cylinder close to the motor of the compressor; The side of the high-pressure cylinder close to the motor has a medium-pressure exhaust port between the low-pressure cylinder and the middle chamber, which is used to communicate with the low-pressure cylinder and the middle chamber, so that the refrigerant flowing out of the low-pressure cylinder flows into the high-pressure cylinder after passing through the middle chamber; among them, The total gas circulation area of ​​the low-pressure cylinder exhausting into the intermediate cavity through the medium-pressure exhaust port is S1, and the total displacement of the low-pressure cylinder exhausting into the intermediate cavity through the medium-pressure exhaust port is V1, 3.5×10 ‑3 ≤S1 / V1≤6.5×10 ‑3 . The compressor of the present invention solves the problem of increased exhaust loss due to the complicated exhaust process of the two-stage compressor placed above the low-pressure cylinder in the prior art.

The invention discloses an exhaust assembly of a compressor and the compressor, the exhaust assembly of the compressor includes an exhaust valve seat and an exhaust valve plate, the exhaust valve seat is provided with an exhaust hole, the bottom wall of the exhaust valve seat is provided with a boss and an escrape, the boss surrounds the exhaust hole, the escrape surrounds the boss, the exhaust valve plate is connected with the exhaust valve seat, and is electively attached to the boss, the height of the boss is h0, the depth of the escrape is h1, the radial distance from the side wall of the escrape to the top point of the boss is Delta R, the limitation opening angle is theta, wherein 0<=h1<= Delta R * Tan(theta)+ h0. The exhaust assembly of the compressor can reduce the area of a thinnest region of the exhaust valve seat by defining of multiple-place dimension relationship of the escrape so as to reduce bearing deformation, and meanwhile by limiting of the height of an exhaust channel first step, gas vortex state caused by a refrigerant can be reduced, exhaust losses in the compressor can be reduced, and the efficiency of the compressor is improved.

The invention provides a profile modification method for the displacement of a vortex compressor. The method comprises the steps of profile modification of a dynamic vortex plate and profile modification of a static vortex plate; asymmetric single arcs are adopted for modification; profile modification of the dynamic vortex plate and profile modification of the static vortex plate both adopt the single arcs; the dynamic modification arc and the static modification arc are totally engaged, and thus the gas exhaust volume of the vortex compressor is effectively increased; and under the condition of the same adiabatic compression ratio, the displacement of the vortex compressor is increased, the area of the center of tooth heads of the static vortex plate is increased, it is beneficial for forming an gas exhaust hole with the large area, and the gas exhaust loss can be effectively reduced. According to the profile modification method for the displacement of the vortex compressor, compared with common symmetric double-arc modification, under the condition of the same involute parameter and the modification abduction angle, through asymmetric single arc modification, the volume of an gas exhaust cavity of the vortex compressor can be increased by about 50%; and under the condition of the same adiabatic gas exhaust temperature, namely under the condition of the same adiabatic compression ratio, through asymmetric single arc modification, the displacement of the vortex compressor is increased by about 50%.

The invention discloses an oil-free lubrication scroll vacuum pump. The pump comprises a movable scroll, a fixed scroll, a crankshaft, a motor, a rotation-prevention mechanism and an axial gap adjusting device; a static-balance-free design structure is adopted in the movable scroll, the movable balance property is improved, the scroll vacuum pump is more compact in whole size, a small-crank rotation prevention mechanism with the radial compliance and a crankshaft with the eccentric structure achieve joint action, the size of the rotation radius is adjusted, and it is ensured that movable scroll revolution and translation are more stable; in order to improve the air suction efficiency of the scroll vacuum pump, the fixed scroll is adopted, wherein the inner side profile and the outer side profile are not symmetric, and the fixed scroll is provided with a single air suction opening; the problems that due to the fixed scroll structure, the volumetric proportion in a work cavity is not equal, the scroll turns over, and the pressure fluctuates are solved through two manners of movable scroll tooth head cutting treatment or the exhaust hole opening range adjustment; meanwhile, an axial gap adjusting device adjusts the gap, caused by the machining error, at the combination position of a movable scroll disc and a fixed scroll disc, and the axial gap leakage is reduced.

The invention provides an exhaust valve assembly, a compressor and an air conditioner. The exhaust valve assembly comprises a flange (1) and an exhaust valve set, a valve seat (2) is arranged on the flange (1), an exhaust port (3) is formed in the valve seat (2), the exhaust valve set comprises an installation seat (4), an elastic piece (5) and a valve block (6), the installation seat (4) is installed on the flange (1), the valve block (6) is located between the exhaust port (3) and the elastic piece (5), one end of the elastic piece (5) abuts against the valve block (6), and the other end of the elastic piece abuts against the installation seat (4). At least two protruding parts (7) are arranged at the end, facing the exhaust port (3), of the installation seat (4), the protruding parts (7) are arranged in the circumferential direction of the installation seat (4) at intervals, and the valve block (6) moves in a guide space formed by the protruding parts (7). According to the exhaust valve assembly, the area of an airflow circulation channel can be increased, fluid resistance is reduced, exhaust losses are reduced, and the performance of the compressor is improved.

The invention relates to a balance valve control system and control method of an asymmetric turbocharger; the control system includes a balance valve control valve, an engine control unit, a supercharger balance valve control diaphragm valve, a balance valve plate, a booster Control method: 1. The engine control unit collects the actual boost pressure and EGR rate; 2. Compare with the target boost pressure and EGR rate to determine whether adjustment is required; 3. Determine the target outlet air pressure of the balance valve control valve; 4. 1. Determine the duty cycle and adjust the outlet air pressure; 5. The actual outlet air pressure acts on the booster balance valve to control the diaphragm valve; 6. The movement of the valve core changes the opening of the balance valve plate, causing the output power of the turbocharger turbine , the change of the pressure before the vortex; 7. Change the amount of work done by the compressor to the air and change the supercharging pressure; 8. Change the EGR rate of the engine; the present invention reduces the pressure before the vortex and the exhaust loss of the engine at medium and high speeds, and improves the economic performance of the engine and environmental performance.

The invention provides a penultimate-stage moving blade for a half-speed high-capacity nuclear turbine. The penultimate-stage moving blade comprises shrouding strips, a blade working part, an intermediate body and a blade root. The height of the blade working part is 1286 mm. The molded line of the blade working part is a variable cross-section twisted blade. The sectional area of the variable cross-section twisted blade gradually decreases along with increasing of the height of the cross section of the blade. Relative twist exists between every two adjacent cross sections. The shrouding strips are located at the top of the blade working part. The blade root is located at the bottom of the blade working part and is a side-mounted first-tree-shaped blade root with a large round angle and low stress concentration. The intermediate body is located between the blade working part and the blade root. The width of the intermediate body is equal to the axial width of the blade root. The shrouding strips, the blade working part, the intermediate body and the blade root are integrally formed. When the blade is in a static state, a gap between the working faces of the two adjacent shrouding strips is zero. The adjacent shrouding strips are coupled to each other at a working rotation speed, so that the whole circle of the penultimate-stage moving blades are connected into a group. The penultimate-stage moving blade is applicable to AP1000 nuclear turbine power generation units and future CAP1400 / CAP1700 nuclear turbine power generation units and can well meet the requirements for pneumatic performance and strength of half-speed high-capacity nuclear turbines.