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

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.

The invention discloses a single-screw compressor. The single-screw compressor comprises a compressor shell, a screw rotor and a slide valve, wherein the slide valve is arranged in a slide valve cavity in the compressor shell in a sliding manner; an exhausting cavity is formed in the compressor shell and comprises an inner cavity groove formed in the compressor shell and an exhausting hole formed in the slide valve cavity; the inner cavity groove is communicated with the slide cavity; at least one part, which is close to the slide valve cavity, of a first side wall of the inner cavity groove is inclined relative to the axis of the screw rotor, and the inclined direction is the same as the spiral direction of the screw rod; and the first side wall is close to an air suction side. The single-screw compressor provided by the invention can be used for reducing exhausting loss, particularly, the exhausting loss caused by the fact that the inner cavity groove is used for exhausting, under any load; and meanwhile, exhausting noises caused by the exhausting loss are reduced.

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 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 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 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.