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

The invention discloses a wind and solar hybrid energy storage and power generation integration system and process. The system comprises a wind power generation subsystem, a solar energy storage subsystem, a liquefied air subsystem and a power subsystem. The process comprises the following steps: solar energy is gathered by a thermal collector to obtain heat energy, the heat energy is stored in heat storge medium; wind energy is converted to electric energy, the wind power is used to liquefy air and stored in the liquefied air; and when electricity is required, the liquefied air is pressurized to recycle cold energy for the air liquefying process, then the air is heated by the high temperature heat storge medium which stores solar energy to obtain high temperature and high pressure air, and finally the air is sent to a multistage reheating turbine to expand and do work. The system of the invention recycles the cold energy of the liquefied air to reduce the wasted work for air liquefying; a pump is used to increase the pressure of the working medium, thus reducing the wasted work for compressing the working medium; the turbine utilizes recycled heat for exhaustm, thus effectively utilizing heat energy; solar energy is utilized to heat the working medium at the inlet of the turbine, thus increasing the expansion efficiency of the turbine; and wind energy and solar energy can be utilized for complementation, energy storage and power generation can be integrated and the system of the invention has wide application prospect.

The invention discloses a device and a method for collecting storage tank discharged gas. The device comprises more than one storage tanks A for storing a medium A, and more than one storage tanks B for storing a medium B; breather valves, emergent release valves, pressure transducers and cutting valves are respectively arranged at the tops of the storage tanks; the cutting valves of the storage tanks A are communicated with storage tank A gas phase pipes through storage tank A pipe fire stoppers; the other ends of the storage tank A gas phase pipes are respectively connected with one end of a storage tank A gas phase gathering pipe; the cutting valves of the storage tanks B are communicated with storage tank B gas phase pipes through storage tank B pipe fire stoppers; the other ends of all the storage tank B gas phase pipes are respectively connected with one end of a storage tank B gas phase gathering pipe; the other end of the storage tank A gas phase gathering pipe and the other end of the storage tank B gas phase gathering pipe are respectively connected with one end of a storage tank gas phase gathering pipe main pipe; and the other end of the storage tank gas phase gathering pipe main pipe is connected with a dirty oil collecting system. The device can reduce the loss caused by direct discharge of oil into the atmosphere, and reduces the probability of generating potential safety hazards by feeding a lot of air into the tanks.

The invention discloses a timber drying machine. The technical proposal is that the timber drying machine comprises a sealable pressure vessel provided with a door, wherein, the pressure vessel is provided with an internal separator board which divides the pressure vessel into a drying chamber and a heat exchange chamber which are communicated with each other; a heater is arranged in the heat exchange chamber; a circulating fan is arranged between the drying chamber and the heat exchange chamber; the pressure vessel is provided with a safety valve which is communicated with the exterior; the pressure vessel is also provided with a cooling device. The invention overcomes the deficiencies of the prior art that the energy consumption of the prior timber drying devices is high, atmospheric pressure high-temperature drying easily lead to higher level of moisture gradient and thus easy cracking and shrinkage, and the like. The invention provides a timber drying machine, which is used for drying or high temperature heat treatment in high-temperature and atmospheric environment, does not easily lead to higher level of moisture gradient and stress of timber, and ensures the drying quality and efficiency of timber.

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.

The invention belongs to the technical field of engines, and relates to a lean burn engine and an automobile. The lean burn engine comprises a water spraying system and an electric control unit, wherein the water spraying system comprises air flue water sprayers, pressure sensors and a water supply device; the air flue water sprayers are connected with the water supply device through water pipes;the pressure sensors are used for detecting the pressure values of the water pipes and sending the pressure values to the electric control unit; the air flue water sprayers are arranged on air inlet channels of air cylinders of the engine and spray water to the air inlet channels; the electric control unit is in signal connection with the air flue water sprayers and the pressure sensors; and whenthe engine is in different work conditions, the pressure values of the water pipes change, the pressure sensors send corresponding signals to the electric control unit according to the different pressure values of the water pipes, and the electric control unit controls the air flue water sprayers to adjust the water spraying amount. According to the lean burn engine, the electric control unit controls the air flue water sprayers to adjust the water spraying amount according to different engine work conditions (loads), and efficient clean combustion of the engine is achieved.

The invention aims to provide a coal mine ventilation air methane oxidation system characterized by stable operation, short system startup time and high heat recovery efficiency. Through matching combination of a gas distribution device, a device body, a reversing device, an actuating device and a measuring and control device, especially the reversing device composed of two three-way valves, the ventilation air methane loss in the pipeline is effectively reduced. The whole system operation, which includes switching of the reversing device, flow measurement and adjustment, pressure and temperature measurement, methane concentration monitoring and feedback, is all carried out under monitoring of the monitoring device. The monitoring and measurement data can be acquired in real time, and a ventilation air methane oxidation operation adjustment scheme can be worked out timely, thus realizing the effects of energy saving and emission reduction. The coal mine ventilation air methane oxidation system provided by the invention has the advantages of stable operation, short system startup time, and high heat recovery efficiency.

The invention provides a single-screw compressor. The tooth form of a star wheel thereof is a reverse bevel edge with a tooth top wider than a dedendum width. The star wheel tooth of the single-screw compressor of the invention adopts a unique shape and greatly increases the volume of a screw channel under the condition of slightly increasing the length of a meshing pair leakage line, thus reducing the leakage rate of the unit air displacement of the compressor, lowering the air displacement loss of the compressor and improving the efficiency of the compressor. The single-screw compressor of the invention can be widely applied in various industries requiring compressors.

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 belongs to the field of structural designs of aircraft engines, and in particular relates to an asymmetrical exhaust structure of a lift fan. The asymmetrical exhaust structure comprisesan asymmetrical caudal vertebra (4), an adapting cartridge receiver (5) and a sprayer nozzle (6). A fairing adapting section is arranged on the adapting cartridge receiver (5), wherein one end of thefairing adapting section is connected to the asymmetrical caudal vertebra (4) and is coaxial with the lift fan; and the other end of the fairing adapting section is connected to the sprayer nozzle (6) and is coaxial with the sprayer nozzle (6). The middle part of the fairing adapting section is a smooth curved surface section. The lift fan is of an asymmetrical exhaust structure. The adapting cartridge receiver provided with the fairing adapting section is connected to the asymmetrical caudal vertebra and the sprayer nozzle, so that the exhaust loss of the lift fan can be reduced and the sprayer nozzle performance and the fan pneumatic performance are guaranteed.

The invention provides a compressor and an air conditioner. The compressor comprises a main shaft, an air cylinder, a flange and a slip sheet, wherein the main shaft comprises convex parts, and the convex parts, the air cylinder, the flange and the slip sheet jointly form compression cavities, at least one main shaft exhaust port is formed in the position, corresponding to each compression cavity,of the convex parts, a flange exhaust port is formed in the flange, one ends of the main shaft exhaust ports communicate with the compression cavities, the other ends of the main shaft exhaust portscan communicate with the flange exhaust port in the rotating process of the main shaft so as to exhaust air, an exhaust valve assembly is arranged at the flange exhaust port, and the exhaust valve assembly can automatically exhaust the air according to the pressure in the compression cavities. According to the compressor and the air conditioner, the structural design of the main shaft exhaust ports, the exhaust valve assembly and the flange exhaust port, it is effectively guaranteed that the number and area of the exhaust port in each compression cavity are fixed, the exhaust port area is large, the exhaust speed is reduced, smooth exhaust of the compressor can be achieved, exhaust losses are effectively reduced, the exhaust mode is simple, and the working performance and reliability of the compressor are ensured.

The invention relates to a balance valve control system and a control method of an asymmetric turbocharger. The control system comprises a balance valve control valve, an engine control unit, a supercharger balance valve control diaphragm valve, a balance valve plate and a supercharger turbine. The control method comprises the steps that of 1, collecting actual supercharging pressure and EGR rateby the engine control unit; 2, comparing with target supercharging pressure and EGR rate, and determining whether adjustment is needed or not; 3, determining the target outlet air pressure of the balance valve control valve; 4, determining a duty ratio, and performing outlet air pressure adjustment; 5, enabling the actual outlet air pressure to be acted on a supercharger balance valve control diaphragm valve; 6, moving a valve element to change the opening degree of the valve plate of the balance valve, thereby causing the change of the output work and the pre-vortex pressure of the supercharger turbine; 7, changing the acting amount of the air compressor on air, and changing the supercharge pressure; and 8, changing the EGR rate of the engine. The control system and control method disclosed by the invention can reduce the pre-vortex pressure and the engine exhaust loss at medium and high rotating speed, and the economic performance and the environment-friendly performance of the engine are improved.

The invention relates to the technical field of compressors, in particular to an exhaust limiting plate for improving the energy efficiency of a compressor. The exhaust limiting plate for improving the energy efficiency of the compressor comprises a limiting plate body, wherein the periphery of the limiting plate body is matched with an installation groove in a valve plate; a lug boss for tightlypressing an exhaust valve plate is arranged at one end of the limiting plate body; a clamping part matched with the installation groove is arranged at the other end of the limiting plate body; the limiting plate body is provided with a liming surface in the direction from the lug boss to the clamping part; the exhaust valve plate is limited by the limiting surface when being opened to a maximum angle; a concave pit concaved locally is arranged at one end, far away from the lug boss, of the limiting surface; and the exhaust valve plate is firstly limited by the limiting surface when being opened to the maximum angle, then a tongue part of the exhaust valve plate continuously moves in the foundation pit, and the exhaust valve plate is finally rebounded and closed. According to the exhaust limiting plate for improving the energy efficiency of the compressor provided by the invention, the energy efficiency of the compressor is improved.

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 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 relates to boiler burning pulverized coal heating equipment. The boiler burning pulverized coal heating equipment comprises A-type pulverized coal heating equipment and B-type pulverizedcoal heating equipment. The A-type pulverized coal heating equipment and the B-type pulverized coal heating equipment are connected and arranged on a raw pulverized coal pipeline. The other end of the A-type pulverized coal heating equipment is connected with a coal mill, and the other end of the B-type pulverized coal heating equipment is connected with a boiler furnace burner. A transition steam pipeline and a transition pulverized coal pipeline are arranged between the A-type pulverized coal heating equipment and the B-type pulverized coal heating equipment. A dewatering outlet is formed in the A-type pulverized coal heating equipment. A steam turbine steam exhaust pipeline is arranged on the B-type pulverized coal heating equipment. The boiler burning pulverized coal heating equipmentis suitable for heat exchange of a coal mill air and powder mixture, steam turbine exhausted steam and any two gas-solid two-phase media flowing at high speed, different steam parameters can be selected according to actual coal types, and the A-type pulverized coal heating equipment and the B-type pulverized coal heating equipment are matched and combined to be used. The problems that heating equipment is short in wearing life, low in heat exchange efficiency and large in flow resistance, and suffers from accumulative detonation are solved.

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.