CN107620698B - Turbocharged air compressor apparatus - Google Patents
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- CN107620698B CN107620698B CN201710957212.2A CN201710957212A CN107620698B CN 107620698 B CN107620698 B CN 107620698B CN 201710957212 A CN201710957212 A CN 201710957212A CN 107620698 B CN107620698 B CN 107620698B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention discloses a turbo charge air compressor device, which comprises an air filter, an air inlet valve, a motor, an air compressor, an oil-gas separator, an oil cooler and an oil filter, wherein the air inlet valve is arranged on the air inlet valve; the output end of the motor is connected with an air compressor; the exhaust port of the air compressor is connected with the oil-gas separator through a pipeline; an air outlet of the oil-gas separator is communicated with an inlet of the air main pipeline, and a lubricating oil outlet is communicated with an inlet of the lubricating oil pipeline; the outlet of the lubricating oil pipeline is communicated with an oil cooler; the lubricating oil cooler is sequentially communicated with the lubricating oil filter and the air compressor through pipelines; further comprising a turbocharger; the turbocharger is divided into a gas compressing end and a turbine end, the turbine end is connected with an outlet of the air main pipeline, and the gas compressing end is communicated with an outlet of the air filter and a gas inlet of the air compressor. According to the invention, the turbocharger is added, the turbocharger is driven by exhaust gas of the air compressor, pre-pressurized air is provided for the air compressor, and the energy efficiency of the air compressor is improved.
Description
Technical Field
The invention belongs to the technical field of air compressors, and particularly relates to a turbo charge air compressor device.
Background
In recent years, along with the shift of global compressor manufacturing industry, china gradually turns into a global compressor production and manufacturing base, the demand of domestic and foreign markets for compressor varieties and quantity continuously increases, the rising of the compressor manufacturing industry in China is promoted, and the higher industry production and manufacturing level is gradually reached.
The screw air compressor has the obvious advantages of energy conservation, high efficiency, strong reliability, low noise and the like, can be more suitable for the development needs of the future compressor market, has the market demand far greater than the growth speed of the traditional compressor, and especially has the annual increase of the demands of industries such as domestic mine, metallurgy, electric power, electronic, mechanical manufacturing, medicine, food, textile light industry, petrochemical industry and the like on the screw air compressor under the energy conservation development trend of low carbon and environment protection, the market demand of the domestic screw air compressor exceeds 38 ten thousands, and the annual average growth speed of the next few years is kept above 20%.
Under the large background of energy conservation and environmental protection, the energy conservation requirement on the screw air compressor is higher and higher, and at present, domestic manufacturers optimize screw rotor molded lines, research and develop two-stage screw air compressors, adopt technical means such as frequency conversion and double frequency conversion to improve the energy efficiency of a compressor system, achieve a certain effect, but also increase the manufacturing cost and the maintenance cost.
The conventional screw air compressor system is shown in fig. 1, and comprises an air filter 100, an air inlet valve 200, a motor 300, an air compressor 400, an oil-gas separator 500, an oil cooler 600, an oil filter 700 and an air cooler 800. The motor 300 drives the air compressor 400 to operate, fresh air enters and is filtered by the air filter 100 and then enters the air inlet valve 200 by utilizing the suction force of the air compressor 400, enters the air inlet valve 400, is compressed by rotary engagement of a rotor, the compressed oil-gas mixture is discharged from the outlet of the air compressor 400 and enters the oil-gas separator 500, the separated high-temperature gas is cooled by the air cooler 800 and then is output, and the separated lubricating oil is cooled by the lubricating oil cooler 600 and then is filtered by the lubricating oil filter 700 and then returns to the air compressor 400 to cool and lubricate the rotor.
In fig. 1, the air pressure at the inlet of the air compressor 400 is negative pressure, so that insufficient air is supplied to the screw rotors to boost pressure, and the length of the screw rotors is increased or bipolar compression (fig. 2) is adopted to compress the air to ensure that the pressure of compressed air discharged meets the requirement, and the existing bipolar screw air compressor is composed of a bipolar compressor shell 401, a primary compression screw rotor pair 402, a secondary compression screw rotor pair 403, a bearing 404, a synchronous gear 405 and other components, so that the structure is complex, and meanwhile, the manufacturing cost and the maintenance cost are increased;
because the length of the screw rotor is increased or bipolar compression (two pairs of male and female rotors) is adopted to compress air, the compression process of the air in the screw air compressor is lengthened, the discharge temperature of the compressed end air is increased (generally reaching 100-120 ℃), the heat dissipation areas of the lubricating oil cooler 6 and the air cooler 8 are increased to control the lubricating oil temperature and the discharge temperature of the compressed air (generally controlling between 75-90 ℃), the increase of the discharge temperature and the increase of the cooler both reduce the energy efficiency of a compressor system, and meanwhile, the larger cooler also increases the manufacturing cost.
Disclosure of Invention
In view of the shortcomings of the prior art, a primary object of the present invention is to provide a turbo charge air compressor device.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention comprises the following steps:
the invention provides a turbo charge air compressor device, which comprises an air filter, an air inlet valve, a motor, an air compressor, an oil-gas separator, an oil cooler and an oil filter, wherein the air inlet valve is arranged on the air inlet valve; the output end of the motor is connected with the air compressor; the exhaust port of the air compressor is connected with the oil-gas separator through a pipeline; the air outlet of the oil-gas separator is communicated with the inlet of an air main pipeline, and the lubricating oil outlet is communicated with the inlet of a lubricating oil pipeline; the outlet of the lubricating oil pipeline is communicated with an oil cooler; the lubricating oil cooler is sequentially communicated with the lubricating oil filter and the air compressor through pipelines; further comprising a turbocharger; the turbocharger is divided into a gas compressing end and a turbine end; the turbine end of the turbocharger is connected with the outlet of the air main pipeline; and the air compressing end of the turbocharger is connected with the outlet of the air filter and the air compressor.
Preferably, the air main pipeline is divided into a first air branch pipeline and a second air branch pipeline through a three-way flow regulating valve; the outlet of the first air branch pipeline is communicated with an air cooler; and the outlet of the second air branch pipeline is connected with the turbine end of the turbocharger.
Preferably, the turbocharger comprises a shell, a turbine, a gas turbine, a connecting shaft, a supporting piece, a nozzle, an oil pool, a gas-compressing end air inlet channel, a gas-compressing end air outlet channel, a turbine-end compressed air inlet channel and a turbine-end compressed air outlet channel; the air compressing wheel and the turbine are arranged at two ends of the connecting shaft; the connecting shaft is supported by the supporting piece; the support is immersed in the oil pool; the nozzle is installed in the turbine-end compressed air intake passage.
Preferably, the pipe carrying area of the compressed air inlet channel at the turbine end is smaller than the pipe carrying area of the compressed air outlet channel at the turbine end.
Preferably, the support member is a cylindrical bearing or a bearing housing.
Preferably, the shell is provided with an oil inlet pipe and an oil outlet pipe; a lubricating oil flow regulating valve is connected to a pipeline between the air compressor and the lubricating oil filter; the lubricating oil flow regulating valve is connected with a lubricating oil inlet pipe through a pipeline; the lubricating oil outlet pipe is connected with the air compressor through a pipeline; and an oil one-way valve is arranged between the air compressor and the oil flow regulating valve.
Preferably, the turbocharged air compressor apparatus provided by the present invention further comprises a pressure sensor mounted at the air inlet of the air compressor.
Preferably, the air compressor is a screw air compressor or a piston air compressor.
Compared with the prior art, the invention has the advantages that:
1. the invention provides a turbo-charged air compressor device, which is characterized in that a turbo-charger is additionally arranged at the inlet of a compressor, partial pressure energy and heat energy of exhaust gas of the air compressor are converted into mechanical energy, so that the turbo-charger pre-compresses normal-pressure air to be sent into the inlet of the air compressor, the compression load of the air compressor is reduced, and meanwhile, the length of a rotor of the screw air compressor can be shortened or double-stage screw compression is cancelled to be changed into single-stage screw compression or a multi-stage piston compression device is reduced.
2. According to the invention, partial heat energy is converted into mechanical energy by utilizing the thermal expansion of the exhaust gas of the air compressor to push the turbine at the turbine end of the supercharger to rotate, so that the temperature of compressed air can be effectively reduced, the heat exchange area of the air cooler is further reduced or the setting of the air cooler is directly canceled; therefore, the manufacturing and maintenance cost of the compressor device is reduced to the greatest extent, the specific power value is reduced, and the energy efficiency and the economy of the whole system are improved.
Drawings
FIG. 1 is a schematic diagram of a prior art screw air compressor apparatus;
FIG. 2 is a schematic diagram of a prior art twin screw air compressor head;
FIG. 3 is a schematic illustration of a turbocharger air compressor device according to one embodiment of the invention;
FIG. 4 is a schematic cross-sectional view of a turbocharger according to the present invention;
fig. 5 is a schematic illustration of the structure of a turbocharger air compressor device without an air cooler.
In FIGS. 1-2, a 100-air cleaner; 200-air inlet valve; 300-motor; 400-screw air compressor; 401-a bipolar compressor housing; 402-first-stage compression screw rotor pairs; 403-two stage compression screw rotor pair; 404-a bearing; 405-synchronizing gears; 500-an oil-gas separator; 600-lubricating oil cooler; 700-lubricating oil filter: 800-an air cooler;
fig. 3-5; 1-an air cleaner; 2-an intake valve; 3-motor; 4-an air compressor; 5-an oil-gas separator; 6-an oil cooler; 7-an oil filter; 8-an air cooler; 9-a turbocharger; 10-a three-way flow regulating valve; 11-a pressure sensor; 12-an oil flow regulating valve; 13-an oil check valve; 101-a housing; 102-a turbine; 103-a pneumatic wheel; 104-a connecting shaft; 105-bearing; 106-a nozzle; 107-an oil pool; 108-a lubricating oil inlet pipe; 109-a lubricating oil outlet pipe; 110-an air inlet channel of the air compression end; 111-an air outlet channel of the air compression end; 112-turbine end compressed air intake passage; 113-a turbine end compressed air outlet channel; 114-an air main; 115-lubricating oil line; 116-a first air branch; 117-second air branch.
Detailed Description
The technical scheme of the invention will be explained in more detail below. It should be understood, however, that within the scope of the present invention, the above-described features of the present invention and features specifically described below (e.g., in the examples) may be combined with each other to form new or preferred embodiments. And are limited to a space, and are not described in detail herein.
Example 1
In order to solve the technical problems existing in the background art, the present invention provides a turbo charged air compressor device as shown in fig. 3 to 4. The turbo charge air compressor device comprises an air filter 1, an air inlet valve 2, an electric motor 3, an air compressor 4, an oil-gas separator 5, an oil cooler 6, an oil filter 7, an air cooler 8, a turbocharger 9, a three-way flow regulating valve 10, a pressure sensor 11, an oil flow regulating valve 12 and an oil check valve 13.
The output end of the motor 3 is connected with the air compressor 4 and is used for directly driving the machine head of the air compressor 4. For better energy efficiency, the motor 3 is preferably a permanent magnet motor.
The air compressor 4 is a screw air compressor or a piston air compressor.
When a screw air compressor is selected, it is directly driven by the motor 3. The transmission mode between the motor 3 and the screw air compressor can be belt transmission or coupling transmission; the motor can also be arranged coaxially with the male rotor of the screw air compressor, thereby improving the transmission efficiency. In order to improve the compression efficiency of the screw air compressor, the two-stage screw compression can be changed into single-stage screw compression, so that the structure of the compressor is simplified, the manufacturing cost and the maintenance cost are reduced, and the economic benefit is improved.
When the multistage piston air compressor is selected, in order to achieve the purposes of simplifying the structure, reducing the manufacturing cost and the maintenance cost and improving the economic benefit, the compression stage number of the piston air compressor can be reduced, for example, the compression mode is changed from three-stage compression to two-stage compression, and the compression mode is changed from two-stage compression to one-stage compression.
The exhaust port of the air compressor 4 is connected with the oil-gas separator 5 through a pipeline. The oil separator 5 is provided with an air outlet communicating with the inlet of an air main pipe 114 and a lubricant outlet communicating with the inlet of a lubricant pipe 115. The outlet of the lubricating oil pipeline 115 is communicated with the lubricating oil cooler 6, and the lubricating oil cooler 6 is sequentially communicated with the lubricating oil filter 7 and the air compressor 4 through pipelines. The air main pipeline 114 is divided into a first air branch pipeline 116 and a second air branch pipeline 117 through the three-way flow regulating valve 10; the outlet of the first air branch pipeline 116 is communicated with the air cooler 8; the outlet of the second air branch 117 is connected to the turbocharger 9.
The air compressor 4 compresses air by utilizing meshed rotation of a male screw and a female screw, sends the high-temperature and high-pressure oil-gas mixture to the oil-gas separator 5 for separation, and sends a part of separated high-temperature and high-pressure air to the turbocharger 9 through the second air branch pipeline 117 by the three-way flow regulating valve 10 so as to drive the turbocharger 9 to rotate; the turbocharger 9 pre-pressurizes the filtered air and sends the air to the air compressor 4; the other part of the compressed air is directly sent to the air cooler 8 through the first air branch pipeline 116, and the air cooler 8 cools the high-temperature compressed air and outputs the cooled high-temperature compressed air. The lubricating oil separated by the oil-gas separator 5 is discharged into a lubricating oil pipeline 115 through a lubricating oil outlet, and is sent into an lubricating oil cooler 6 for cooling through the lubricating oil pipeline 115; the oil cooler 6 cools the high-temperature lubricating oil and sends the high-temperature lubricating oil to the lubricating oil filter 7; the lubricating oil filter 7 conveys the filtered and cooled lubricating oil to the inside of the air compressor 4 for lubricating and cooling the screw rotor.
As shown in fig. 3 and 4, the turbocharger 9 is divided into a compressor end and a turbine end. The air compressing end is connected with the air filter 1, and the air filter 1 filters dust and particles in air. The air compressing end is connected with an air inlet of the air compressor 4 through the air inlet valve 2. The air inlet valve 2 is installed at the air inlet of the air compressor 4, and is used for adjusting the air inflow and the switching time of the air compressor 4.
The pressure sensor 11 is installed at the air inlet of the air compressor 4, the pressure sensor 11 is used for detecting the air pressure actually entering the air compressor 4, converting a pressure signal into an electric signal of 0-4 milliamp or 0-20 milliamp, sending the electric signal to the amplifier, controlling the three-way flow regulating valve 10 by the amplifier, and regulating and controlling the opening of the three-way flow regulating valve 10 according to the detection data of the pressure sensor 11, so that the supercharging air quantity of the turbocharger 9 is controlled to be 2-3 times as much as the requirement of the air compressor 4, and the requirements are more matched.
The opening of the three-way flow regulating valve 10 is controlled by a pressure signal of the pressure sensor 11, when the high-temperature and high-pressure gas from the oil-gas separator 5 is unloaded by the three-way flow regulating valve 10 and the air compressor 4, the three-way flow regulating valve 10 is completely closed, the turbocharger 9 does not work, when the air compressor 4 works normally, the three-way flow regulating valve 10 is completely opened, the compressed air completely reaches the turbine end of the turbocharger 9, and the compressed air expanded by the turbine end of the turbocharger 9 is cooled by the air cooler 8 and is supplied to the air utilization mechanism. The three-way flow regulating valve 10 can automatically regulate the pressure sensor 11 to be in a proper opening state according to the pressure signal, so that part of compressed air is sent to the turbine end of the turbocharger 9, and part of compressed air is directly sent to the air cooler 8 for cooling, so that the air inflow of the turbocharger 9 and the air compressor 4 reaches a set matching and stable state.
The turbocharger 9 may alternatively be a mechanical turbocharger. When the mechanical turbocharger 9 is selected, a direct drive of the motor may be employed. The motor transmits power to the mechanical turbocharger in a belt transmission or coaxial transmission mode. The motor for providing the drive can be a main motor of the air compressor or an external small motor for direct drive.
The specific structure of the turbocharger is described in detail below:
as shown in fig. 4, the turbocharger includes a housing 101, a turbine 102, a compressor wheel 103, a connecting shaft 104, a support 105, a nozzle 106, an oil sump 107, a turbine-side compressed air intake passage 112, a turbine-side compressed air outlet passage 113, a compressor-side air intake passage 110, and a compressor-side air outlet passage 111.
The air inlet channel 110 and the air outlet channel 111 are arranged at the air compression end. The turbine-end compressed air inlet channel 112 and the turbine-end compressed air outlet channel 113 are formed at the turbine end. The pipe-carrying area of the turbine-end compressed air inlet channel 112 is smaller than that of the turbine-end compressed air outlet channel 113. Preferably, the ratio of the pipe-carrying area of the compressed air inlet channel 112 at the turbine end to the pipe-carrying area of the compressed air outlet channel 113 at the turbine end is 1:3. The thermal energy generated by the thermal expansion of the compressed air accelerates the rotation of the turbine 102, converting some of the thermal energy into mechanical energy, while reducing the compressed air exhaust temperature.
The air wheel 103 and the turbine 102 are arranged at two ends of a connecting shaft 104, and the connecting shaft 104 is supported by a supporting piece 105; the support 105 is immersed in the oil sump 107 for lubrication. The nozzle 106 is installed in the compressed air inlet channel 112 at the turbine end, high-temperature compressed air from the oil-gas separator 5 is continuously sprayed onto the turbine 102, the turbine 102 is pushed to operate at a high speed under the combined action of the pressure energy and the heat energy of the high-pressure high-temperature air, the high-speed operating turbine 102 enables the air compressing wheel 103 to operate at a high speed synchronously through the connecting shaft 104, the air compressing wheel 103 pre-compresses the sucked fresh air, the fresh air is sent to the air compressor 4 through the air inlet valve 2, the pre-compressed air is provided for 2-3 times of the normal air demand of the air compressor 4, and the negative pressure (vacuum) state at the inlet of the original air compressor 4 is changed into the positive pressure state, so that the compression load of the air compressor 4 is reduced, and the gas production efficiency is improved. The air inlet pressure of the air compressor 4 is changed from negative pressure to positive pressure, and the exhaust pressure of the air compressor 4 can be improved under the condition of the effective volume of the same rotor molded line; on the premise of ensuring the same exhaust pressure, the length of the rotor can be shortened, the load and the manufacturing cost of the air compressor 4 can be reduced, and the compression efficiency can be improved.
The support 105 is a cylindrical bearing or bearing housing. The cylindrical bearing or the bearing sleeve is soaked in the oil pool 107 for lubrication, the lubricating oil in the oil pool 107 can be added in advance, and the cooled lubricating oil can be circulated into the oil pool 107 for lubrication and cooling.
The concrete mode of the lubricating oil adopting the cooling circulation is as follows: a lubricant inlet pipe 108 and a lubricant outlet pipe 109 are provided in the housing 101; and a lubricating oil flow regulating valve 12 is connected to a pipeline between the lubricating oil filter 7 and the air compressor 4; the lubricating oil flow regulating valve 12 is connected with a lubricating oil inlet pipe 108 through a pipeline; a lubricating oil outlet pipe 109 is connected with the air compressor 4 through a pipeline; an oil check valve 13 is arranged between the air compressor 4 and the oil flow regulating valve 12. The cooled lubricating oil fraction is circulated through the oil inlet pipe 108 of the turbocharger 9 and introduced into the oil sump 107 of the turbocharger 9 to lubricate and cool the support 105, and then returned to the air compressor 4 through the oil outlet pipe 109. The lubricating oil check valve 13 ensures that the lubricating oil from the lubricating oil flow regulating valve 12 can be delivered to the inside of the screw air compressor 4 for lubricating and cooling the screw rotor.
Example 2
In order to solve the technical problems in the prior art, the invention also provides another technical scheme.
As shown in fig. 5, this embodiment provides a turbo charged air compression device, which is different from embodiment 1 in that: the arrangement of the air cooler 6 is directly canceled, so that the manufacturing cost of the whole air compressor device is reduced, and the economical efficiency of the device is improved.
Because of the effect of the turbocharger 9, the inlet air pressure of the air compressor 4 is changed from negative pressure to positive pressure, so that the compression load and the exhaust temperature of the air compressor 4 are effectively reduced, high-temperature compressed air is converted into mechanical energy through the thermal expansion of the turbine end nozzle 106, the turbine end compressed air inlet channel 112, the turbine end compressed air outlet channel 113 and the inner cavity of the turbocharger 9, and the temperature of the compressed air discharged from the turbine end is greatly reduced, therefore, in the embodiment 2, the setting of an air cooler is directly canceled, the manufacturing cost of the whole air compressor system is reduced, and the economical efficiency of the system is improved.
While the foregoing has been disclosed in the specification and drawings, it will be apparent to those skilled in the art that various substitutions and modifications may be made without departing from the spirit of the invention, and it is intended that the scope of the invention be limited not by the specific embodiments disclosed, but by the appended claims.
Claims (8)
1. A turbo charge air compressor device comprises an air filter (1), an air inlet valve (2), a motor (3), an air compressor (4), an oil-gas separator (5), an oil cooler (6) and an oil filter (7); the output end of the motor (3) is connected with the air compressor (4); the exhaust port of the air compressor (4) is connected with the oil-gas separator (5) through a pipeline; the air outlet of the oil-gas separator (5) is communicated with the inlet of an air main pipeline (114), and the lubricating oil outlet is communicated with the inlet of a lubricating oil pipeline (115); an outlet of the lubricating oil pipeline (115) is communicated with an lubricating oil cooler (6); the lubricating oil cooler (6) is sequentially communicated with the lubricating oil filter (7) and the air compressor (4) through pipelines; the method is characterized in that: further comprising a turbocharger (9); the turbocharger (9) is divided into a compression end and a turbine end, and the turbine end is connected with an outlet of the air main pipeline (114); the air compressing end is communicated with the outlet of the air filter (1) and the air inlet of the air compressor (4).
2. The turbocharged air compressor apparatus of claim 1, wherein: the air main pipeline (114) is divided into a first air branch pipeline (116) and a second air branch pipeline (117) through a three-way flow regulating valve (10); the outlet of the first air branch pipeline (116) is communicated with an air cooler (8); the outlet of the second air branch line (117) is connected to the turbine end of the turbocharger (9).
3. The turbocharged air compressor apparatus of claim 2, wherein: the turbocharger (9) comprises a shell (101), a turbine (102), a gas turbine (103), a connecting shaft (104), a supporting piece (105), a nozzle (106), an oil pool (107), a gas-compressing end air inlet channel (110), a gas-compressing end air outlet channel (111), a turbine-end compressed air inlet channel (112) and a turbine-end compressed air outlet channel (113); the air compressing wheel (103) and the turbine (102) are arranged at two ends of the connecting shaft (104); the connecting shaft (104) is supported by a support (105); -the support (105) is immersed in the oil sump (107); the nozzle (106) is mounted within a turbine end compressed air intake passage (112).
4. A turbocharged air compressor arrangement as claimed in claim 3 wherein: the pipe carrying area of the turbine end compressed air inlet channel (112) is smaller than the pipe carrying area of the turbine end compressed air outlet channel (113).
5. A turbocharged air compressor arrangement as claimed in claim 3 wherein: the support (105) is a cylindrical bearing or bearing housing.
6. A turbocharged air compressor arrangement as claimed in claim 3 wherein: the shell (101) is provided with an oil inlet pipe (108) and an oil outlet pipe (109); a lubricating oil flow regulating valve (12) is connected to a pipeline between the air compressor (4) and the lubricating oil filter (7); the lubricating oil flow regulating valve (12) is connected with a lubricating oil inlet pipe (108) through a pipeline; the lubricating oil outlet pipe (109) is connected with the air compressor (4) through a pipeline; an oil check valve (13) is arranged between the air compressor (4) and the oil flow regulating valve (12).
7. The turbocharged air compressor apparatus of claim 1, wherein: also comprises a pressure sensor (11), wherein the pressure sensor (11) is arranged at the air inlet of the air compressor (4).
8. The turbocharged air compressor apparatus of claim 1, wherein: the air compressor (4) is a screw air compressor or a piston air compressor.
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| CN109373626B (en) * | 2018-09-04 | 2021-01-08 | 北京航空航天大学 | Air expansion refrigerating system with high adaptability based on compressed air energy storage |
| CN111237099A (en) * | 2020-02-19 | 2020-06-05 | 中国船舶重工集团公司第七一一研究所 | High EGR rate single cylinder engine exhaust gas recirculation system with filtering device |
| CN112727729A (en) * | 2021-02-25 | 2021-04-30 | 董可俊 | Reciprocating piston type air compressor |
| CN113606724B (en) * | 2021-08-09 | 2022-08-16 | 兰州大学 | Anti-infection nursing device and using method thereof |
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| KR20060072734A (en) * | 2004-12-23 | 2006-06-28 | 두산인프라코어 주식회사 | Appareatus for supplying compressed air of construction heavy equipments |
| CN101126389A (en) * | 2007-09-24 | 2008-02-20 | 苏州昆拓冷机有限公司 | Magnetic suspension turbocharging device of refrigeration machine |
| CN101169118A (en) * | 2007-11-23 | 2008-04-30 | 苏州昆拓冷机有限公司 | Turbocharging device of refrigeration machine |
| CN201486870U (en) * | 2009-08-04 | 2010-05-26 | 深圳寿力亚洲实业有限公司 | Screw type compressor oil path system |
| CN201786608U (en) * | 2010-08-24 | 2011-04-06 | 李军 | Energy-saving air compressor |
| CN202579188U (en) * | 2012-03-30 | 2012-12-05 | 东莞市雅迪勤压缩机制造有限公司 | Oil-spraying screw air compressor capable of recovering excess heat |
| CN203743002U (en) * | 2014-03-27 | 2014-07-30 | 徐恒枝 | Energy-saving device for screw air compressor |
| CN105065110A (en) * | 2015-07-21 | 2015-11-18 | 同济大学 | Organic rankine cycle and electric power dual-drive internal combustion engine pressurization system |
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