CN211924433U - Oilless middle-high pressure air compressor - Google Patents

Abstract

The utility model discloses an oil-free medium and high pressure air compressor, which comprises a compressor unit and a cooling pipeline. The compressor unit includes a primary compression device and a secondary oil-free booster compression device, and the primary compression device includes two series-connected first The screw compression host and the second screw compression host, the two-stage oil-free booster compression device includes the first booster compressor host and the second booster compressor host, and the air outlet of the second screw compressor host is connected to the first booster compressor host. The air inlet, the cooling pipeline includes a water inlet pipe and a water outlet pipe, the cooling liquid inlets of the first screw compression main engine, the second screw compression main engine, the first supercharged compression main engine and the second supercharged compression main engine are respectively connected to the water inlet pipe, The coolant outlets of the first screw compression main engine, the second screw compression main engine, the first supercharged compression main engine and the second supercharged compression main engine are each connected to the water outlet pipe. The cooling device in the oil-free medium and high pressure air compressor of the utility model has the advantages of simple structure and good cooling effect.

Description

Oil-free medium and high pressure air compressor

technical field

The utility model relates to the field of power equipment, in particular to an oil-free medium and high pressure air compressor.

Background technique

An air compressor is a device used to compress gas. The air compressor is similar in structure to a water pump. Most of the air compressors work in a reciprocating piston type, a rotary vane type or a rotary screw type.

In the compression operation of the air compressor, there are two links: air compression and gas boosting. These two links compress the gas respectively, so that the pressure and temperature of the gas increase, so cooling devices are installed in these two links. . In the air compression process, a first-stage screw compressor is usually used to compress the air. If high-pressure gas needs to be output, multiple sets of first-stage screw compressors need to be added, but this leads to more heat generated when the equipment is working, which corresponds to However, due to the complex structure and poor cooling effect of the current cooling device, it is difficult to meet the working needs of the equipment.

Therefore, there is an urgent need for an oil-free medium and high pressure air compressor with a simple structure and good cooling effect of a cooling device to overcome the above drawbacks.

Utility model content

The purpose of the utility model is to provide an oil-free medium and high pressure air compressor with a simple structure of a cooling device and good cooling effect.

In order to achieve the above purpose, the oil-free medium and high pressure air compressor of the present invention includes a compressor unit and a cooling pipeline for cooling the compressor unit, the compressor unit includes a primary compression device and a A two-stage oil-free booster compression device for pressurizing the compressed air, characterized in that the primary compression device comprises two first screw compression main engines and second screw compression main engines connected in series, the first screw compression main engine The air outlet is connected to the air inlet of the second screw compressor main engine, and the two-stage oil-free supercharger compression device includes a first supercharger compressor main engine and is used to compress the air compressed by the first supercharger compressor main engine again. The second supercharger compression main engine is pressurized, the air outlet of the second screw compression main engine is connected to the air inlet of the first supercharger compression main engine, and the cooling pipeline includes a water inlet pipe and a water outlet pipe. The coolant inlets of the screw compressor, the second screw compressor, the first booster compressor and the second booster compressor are each connected to the water inlet pipe. The coolant outlets of the first supercharging and compressing main engine and the second supercharging and compression main engine are each connected to the water outlet pipe.

Preferably, the primary compression device further comprises a screw primary air cooler and a screw secondary air cooler, the air outlet of the first screw compression main engine is connected to the air inlet of the screw primary air cooler, The air outlet of the screw primary air cooler is connected to the air inlet of the second screw compression main engine, and the air outlet of the second screw compression main engine is connected to the air inlet of the screw secondary air cooler and the air outlet of the screw secondary air cooler is communicated with the air inlet of the first supercharging and compressing main engine.

Preferably, the two-stage oil-free supercharging and compressing device further comprises a supercharging primary air cooler and a supercharging secondary air cooler, and the air outlet of the first supercharging and compressing main engine is communicated with the supercharging one. The air inlet of the stage air cooler, the air outlet of the supercharged primary air cooler is connected to the air inlet of the second supercharger compressor main engine, and the air outlet of the second supercharger compressor main engine is connected to the The inlet of the supercharged secondary air cooler.

Preferably, a first-stage air-water separator is installed between the screw primary air cooler and the second screw compression main engine, and a screw secondary air cooler is installed between the first boost compression main engine. There is a secondary gas-water separator.

Preferably, a three-stage air-water separator is installed between the supercharged primary air cooler and the second supercharged compression main engine, and the air outlet of the supercharged secondary air cooler communicates with a fourth-stage air. water separator.

Preferably, between the first screw compression main engine and the screw primary air cooler, and between the second screw compression main engine and the screw secondary air cooler, a silencer and a shock absorber are installed correspondingly. device.

Preferably, the oil-free medium and high pressure air compressor of the present invention further comprises a secondary lubricating device for supplying oil and lubricating the crankcase in the secondary oil-free supercharging and compressing device, and the secondary lubricating device comprises: A booster oil pump, a booster oil cooler and a booster oil filter, the oil inlet of the booster oil pump is communicated with the oil outlet of the crankcase, and the oil outlet of the booster oil pump is communicated with the booster oil The oil inlet of the pressurized oil cooler, the oil outlet of the supercharged oil cooler is communicated with the oil inlet of the supercharged oil filter, and the oil outlet of the supercharged oil filter is communicated with the crankshaft tank inlet.

Preferably, the oil-free medium and high pressure air compressor of the utility model further includes a primary lubricating device for supplying oil to the primary compression device, and the primary lubricating device includes a screw oil pool, a screw oil pump, and a screw oil cooler. , screw oil filter and oil distributor, the oil inlet of the screw oil pump is connected to the screw oil pool, the oil outlet of the screw oil pump is connected to the oil inlet of the screw oil cooler, the screw oil The oil outlet of the cooler is communicated with the oil inlet of the screw oil filter, the oil outlet of the screw oil filter is communicated with the oil inlet of the oil distributor, and the oil outlet of the oil distributor is The bearing chamber of the first screw compression main engine is communicated with the oil inlet of the bearing chamber of the second screw compression main engine, and the outlet of the bearing chamber of the first screw compression main engine and the bearing chamber of the second screw compression main engine is connected. The oil ports are each communicated with the screw oil pool, and the pressure relief valve on the oil distributor is also communicated with the screw oil pool.

Preferably, the cooling inlets of the screw primary air cooler, the screw secondary air cooler, the supercharged primary air cooler, the supercharged secondary air cooler, the supercharged oil cooler and the screw oil cooler are respectively Connected to the water inlet pipe, the screw primary air cooler, the screw secondary air cooler, the supercharged primary air cooler, the supercharged secondary air cooler, the supercharged oil cooler and the screw oil cooler The cooling liquid outlets are each communicated with the water outlet pipes.

Preferably, an air filter and an air intake valve are also installed at the air inlet of the first screw compression main engine.

Compared with the prior art, since the coolant inlets of the first screw compression main engine, the second screw compression main engine, the first supercharged compression main engine and the second supercharged compression main engine are each connected to the water inlet pipe, the first screw compression main engine, the The coolant outlets of the two-screw compressor, the first booster and the second booster compressor are connected to the water outlet pipe respectively. The booster compressor main engine is independently communicated with the cooling pipeline, so it can effectively and quickly discharge the heat generated during operation. Therefore, the oil-free high-pressure air compressor of the present invention has a good cooling effect, and because the cooling pipeline The structure is relatively simple, easy to install and maintain.

Description of drawings

Fig. 1 is the pipeline connection schematic diagram of the oil-free medium and high pressure air compressor of the present invention.

Detailed ways

In order to describe the technical content and structural features of the present utility model in detail, further description is given below with reference to the embodiments and the accompanying drawings.

As shown in FIG. 1 , the oil-free medium and high pressure air compressor 100 of the present invention includes a compressor group 10 and a cooling pipeline 20 for cooling the compressor group 10. The compressor group 10 includes a primary compression device 11 and a The secondary oil-free booster compression device 12 is a two-stage oil-free booster compression device 12 that is pressurized by the air compressed by the compression device 11. The primary compression device 11 includes two first screw compression main engines 111 and second screw compression main engines 112 connected in series. The air outlet is communicated with the air inlet of the second screw compression main engine 112. The secondary oil-free supercharging and compression device 12 includes a first supercharging compression main engine 121 and is used to compress the air compressed by the first supercharging and compression main engine 121 again. The air outlet of the second screw compression main engine 122 is connected to the air inlet of the first supercharged compression main engine 121. The cooling pipeline 20 includes a water inlet pipe 21 and a water outlet pipe 22. The first screw compression main engine 111. The coolant inlets of the second screw compressor 112, the first booster compressor 121 and the second booster compressor 122 are each connected to the water inlet pipe 21. The first screw compressor 111, the second screw compressor 112, the first screw compressor The coolant outlets of the first booster compressor 121 and the second booster compressor 122 are connected to the water outlet pipe 22, respectively. The supercharging and compression main engines 122 are independently communicated with the cooling pipeline 20, so the heat generated during operation can be effectively and quickly discharged. Therefore, the oil-free medium and high pressure air compressor 100 of the present invention has a good cooling effect. The structure of the pipeline 20 is relatively simple and easy to install and maintain. In addition, since the primary compression device 11 includes two sets of screw compression main engines connected in series, the pressure of the compressed air output from the primary compression device 11 is relatively high, so that the compressor group 10 can finally output compressed air with a higher pressure, which is suitable for It is used when outputting medium and high pressure gas. For example, the first screw compression main engine 111 and the second screw compression main engine 112 are driven by a motor through a speed-increasing gear box, each of which is an oil-free twin-screw main engine, the first supercharger compression main machine 121 and the second supercharger compressor. The main engines 122, each being an oil-free compression piston main engine, are driven by a motor through a belt transmission device, but are not limited thereto. Specifically, an air filter 119 and an intake valve 110 are also installed at the air inlet of the first screw compression main engine 111 to purify the air input into the primary compression device 11 . More specifically, as follows:

As shown in FIG. 1 , the primary compression device 11 further includes a screw primary air cooler 113 and a screw secondary air cooler 114 , and the air outlet of the first screw compression main engine 111 is connected to the air inlet of the screw primary air cooler 113 . , the air outlet of the screw primary air cooler 113 is communicated with the air inlet of the second screw compression main engine 112, the air outlet of the second screw compression main engine 112 is communicated with the air inlet of the screw secondary air cooler 114, and the screw two The air outlet of the stage air cooler 114 is connected to the air inlet of the first supercharging and compression main engine 121. The screw primary air cooler 113 and the screw secondary air cooler 114 can cool the compressed air, which is beneficial to improve the compression efficiency and The energy efficiency ratio of the device. Specifically, the two-stage oil-free supercharger and compression device 12 further includes a supercharged primary air cooler 123 and a supercharged secondary air cooler 124, and the air outlet of the first supercharged compressor main engine 121 is connected to the supercharged primary air cooling The air inlet of the supercharger 123, the air outlet of the supercharged primary air cooler 123 is connected to the air inlet of the second supercharged and compressed main engine 122, and the air outlet of the second supercharged and compressed main engine 122 is connected to the supercharged secondary air cooling The intake port of the supercharger 124, the supercharged primary air cooler 123 and the supercharged secondary air cooler 124 can cool down the compression after supercharging, effectively reduce the exhaust gas temperature, and also help to improve the compression efficiency and the energy efficiency ratio of the equipment . Preferably, the two-stage oil-free booster compression device 12 includes at least two stages of oil-free compression, and the second booster compressor host 122 is connected in series after the first booster compressor host 121 to ensure the difference between the air supply volume and the gas supply pressure. stability. More specifically, a primary air-water separator 115 is installed between the screw primary air cooler 113 and the second screw compression main engine 112 , and a secondary air-water separator 115 is installed between the screw secondary air cooler 114 and the first boost compression main engine 121 . A three-stage air-water separator 125 is installed between the air-water separator 116, the supercharged primary air cooler 123 and the second supercharged compression main engine 122, and the air outlet of the supercharged secondary air cooler 124 is connected to a fourth-stage air The water separator 126, the air-water separator provided can ensure that the condensed water in the compressed air is separated before entering the following compressor, so as to avoid damage to the following compressor. In order to reduce or eliminate the sound or vibration generated by the primary compression device 11 during operation, between the first screw compression main engine 111 and the screw primary air cooler 113, the second screw compression main engine 112 and the screw secondary air cooler A muffler 117 and a shock absorber 118 are respectively installed between the 114 .

As shown in FIG. 1 , the oil-free medium and high pressure air compressor 100 of the present invention further includes a secondary lubricating device 30 for supplying oil and lubricating the crankcase 120 in the secondary oil-free booster compression device 12 and a secondary lubricating device 30 for The primary compression device 11 supplies the primary lubricating device 40 for oil lubrication. The secondary lubricating device 30 includes a supercharged oil pump 31, a supercharged oil cooler 32 and a supercharged oil filter 33. The oil inlet of the supercharged oil pump 31 is communicated with the crankcase. 120, the oil outlet of the supercharged oil pump 31 is connected to the oil inlet of the supercharged oil cooler 32, and the oil outlet of the supercharged oil cooler 32 is connected to the oil inlet of the supercharged oil filter 33, The oil outlet of the supercharged oil filter 33 is connected to the oil inlet of the crankcase 120, so the secondary lubricating device 30 injects circulating lubricating fluid into the crankcase 120 to ensure that the secondary oil-free supercharging and compression device 12 can maintain stable and smooth operation . In order to facilitate observation and control of the lubricating oil circuit, the secondary lubricating device 30 further includes a secondary oil pressure sensor 34 and a secondary oil temperature sensor 35 which are communicated with the oil outlet of the supercharged oil filter 33 . Specifically, the primary lubricating device 40 includes a screw oil pool 41, a screw oil pump 42, a screw oil cooler 43, a screw oil filter 44 and an oil distributor 45. The oil inlet of the screw oil pump 42 is communicated with the screw oil pool 41, and the screw oil pump 42 The oil outlet is connected to the oil inlet of the screw oil cooler 43, the oil outlet of the screw oil cooler 43 is connected to the oil inlet of the screw oil filter 44, and the oil outlet of the screw oil filter 44 is connected to the oil distributor The oil inlet of 45 and the oil outlet of the oil distributor 45 are respectively connected with the bearing chamber of the first screw compression main engine 111 and the oil inlet of the bearing chamber of the second screw compression main engine 112. The bearing chamber of the first screw compression main engine 111 and The oil outlets of the bearing chambers of the second screw compression main engine 112 are each connected to the screw oil pool 41, and the oil distributor 45 is also connected to the screw oil pool 41. Therefore, the primary lubricating device 40 injects circulating lubricating fluid into the primary compression device 11 to ensure primary compression. The device 11 works stably and smoothly, and uses the oil distributor 45 to distribute the lubricating oil, so as to ensure the order, balance and stability of the lubricating oil circuit. In order to facilitate the observation and control of the lubricating oil circuit, the oil distributor 45 is provided with an oil temperature sensor 46 and an oil pressure sensor 47 . Further, screw primary air cooler 113, screw secondary air cooler 114, supercharged primary air cooler 123, supercharged secondary air cooler 124, supercharged oil cooler 32 and screw oil cooler 43 The cooling liquid inlets are connected to the water inlet pipe 21, the screw primary air cooler 113, the screw secondary air cooler 114, the supercharged primary air cooler 123, the supercharged secondary air cooler 124, and the supercharged oil cooler. 32 and the cooling liquid outlet of the screw oil cooler 43 are respectively connected to the water outlet pipe 22 to ensure the cooling efficiency.

In order to facilitate the unified collection of condensed water generated during the operation of each device, the oil-free medium and high pressure air compressor 100 of the present invention further includes a condensed water collection pipe 50 , a primary gas-water separator 115 and a secondary gas-water separator 116 The condensed water outlets of the third-stage gas-water separator 125 and the fourth-stage gas-water separator 126 are each connected to the condensed water collection pipe 50 . A blowdown control solenoid valve 60 and blowdown pneumatic valve are installed at the condensed water outlets of the primary gas-water separator 115 , the secondary gas-water separator 116 , the tertiary gas-water separator 125 and the fourth-stage gas-water separator 126 respectively. 70 and check valve. In addition, the oil-free medium and high pressure air compressor 100 of the present invention further includes a blowdown control device 80, wherein the blowdown control device 80 includes a pressure reducing valve 81 connected to the air outlet of the secondary air-water separator 116 and communicated in sequence. , check valve 82 and instrument air tank 83, wherein the air outlet of instrument air tank 83 is communicated with the air inlet of each sewage control solenoid valve 60, so that when the oil-free high-pressure air compressor 100 outputs compressed air normally, The generated condensed water can be discharged to the condensed water collection pipe 50 through the multi-pipeline. In addition, the inlet of the control air passage of the intake valve 110 is communicated with the air outlet of the secondary air-water separator 116, so that the medium and high pressure compressor 100 of the present invention can keep the intake valve 110 in an open state during operation, and the medium and high pressure compressor When the engine 100 is stopped, the intake valve 110 is correspondingly in a closed state to realize automatic opening and closing of intake. A muffler 1101 is also installed at the outlet of the control air path of the intake valve 110. The muffler 1101 and the muffler 117 at the outlet of the second screw compressor main engine 112 are communicated with each other through a venting line. When the high-pressure air compressor 100 is in the unloading mode, it is convenient to perform venting and silencing treatment on a very small amount of compressed air, so as to realize no-load operation of the oil-free medium-pressure air compressor 100 and reduce energy consumption. In order to facilitate the observation and monitoring of the temperature and pressure on each pipeline, multiple temperature sensors, pressure sensors and pressure gauges (not fully marked in the figure) are provided on each pipeline according to actual needs, but not limited to this.

1, the working principle of the oil-free medium and high pressure air compressor 100 of the present invention will be described: in the working state, the first screw compression main engine 111 inputs air through the air filter 119, and the air passes through the first screw compression main engine 111. After compression, it enters the screw primary air cooler 113 and the primary air-water separator 115 for cooling and water-gas separation, and the separated compressed air enters the second screw compression main engine 112 for recompression. The compressed air enters the screw secondary air cooler 114 and the secondary air-water separator 116 successively for cooling and water-gas separation, and the separated compressed air then enters the first booster compression host 121 for secondary compression, The compressed air after the secondary compression enters into the supercharged primary air cooler 123 and the tertiary air-water separator 125 successively for cooling and water-gas separation, and the separated compressed air then enters the second supercharged compression main engine 122 The compressed air discharged from the air outlet of the second supercharged compression compressor 122 enters the supercharged secondary air cooler 124 and the fourth stage air-water separator 126 successively and then is output to the outside world. The working principle is as above said.

Compared with the prior art, since the coolant inlets of the first screw compression main engine 111, the second screw compression main engine 112, the first supercharged compression main engine 121 and the second supercharged compression main engine 122 are each connected to the water inlet pipe 21, the first The coolant outlets of the screw compression main engine 111, the second screw compression main engine 112, the first supercharged compression main engine 121 and the second supercharged compression main engine 122 are each connected to the water outlet pipe 22. The main engine 112, the first supercharging compressor main engine 121 and the second supercharging compression main engine 122 are independently communicated with the cooling pipeline 20, so the heat generated during operation can be effectively and quickly discharged, so the oil-free oil The cooling effect of the medium and high pressure air compressor 100 is good, and since the structure of the cooling pipeline 20 is relatively simple, installation and maintenance are easy.

The above disclosures are only preferred examples of the present invention, and cannot limit the scope of the rights of the present invention. Therefore, the equivalent changes made according to the claims of the present invention all belong to the scope covered by the present invention.

Claims (10)

1. An oil-free medium and high pressure air compressor, comprising a compressor group and a cooling pipeline for cooling the compressor group, the compressor group comprising a primary compression device and a compressor for compressing the primary compression device. A two-stage oil-free booster compression device for air pressurization, characterized in that the primary compression device includes two first screw compression main engines and second screw compression main engines connected in series, and the air outlet of the first screw compression main engine is connected to each other. At the air inlet of the second screw compression main engine, the two-stage oil-free supercharging and compressing device includes a first supercharging compression main engine and a second supercharging compressor for recompressing the air compressed by the first supercharging compression main engine. The supercharging and compression main engine, the air outlet of the second screw compression main engine is connected to the air inlet of the first supercharging and compression main engine, the cooling pipeline includes a water inlet pipe and a water outlet pipe, the first screw compression main engine, The coolant inlets of the second screw compression main engine, the first supercharged compression main engine, and the second supercharged compression main engine are each connected to the water inlet pipe, and the first screw compression main engine, the second screw compression main engine, and the first supercharged compression main engine are connected to the water inlet pipe. The cooling liquid outlets of the main engine and the second supercharging and compression main engine are each communicated with the water outlet pipe. 2. The oil-free medium and high pressure air compressor according to claim 1, wherein the primary compression device further comprises a screw primary air cooler and a screw secondary air cooler, and the first screw compression host has a The air outlet is communicated with the air inlet of the screw primary air cooler, and the air outlet of the screw primary air cooler is communicated with the air inlet of the second screw compression main engine and the second screw compression main engine The air outlet of the screw secondary air cooler is connected to the air inlet of the screw secondary air cooler, and the air outlet of the screw secondary air cooler is connected to the air inlet of the first supercharging compressor main engine. 3. The oil-free medium and high pressure air compressor according to claim 2, wherein the two-stage oil-free supercharging and compressing device further comprises a supercharged primary air cooler and a supercharged secondary air cooler, so The air outlet of the first supercharger compressor main engine is communicated with the air inlet of the supercharged primary air cooler, and the air outlet of the supercharged primary air cooler is communicated with the inlet of the second supercharged compression main engine. The air outlet, the air outlet of the second supercharging compressor main engine is communicated with the air inlet of the supercharging secondary air cooler. 4. The oil-free medium and high pressure air compressor according to claim 2, wherein a first-stage air-water separator is installed between the screw primary air cooler and the second screw compression main engine, and the screw A secondary air-water separator is installed between the secondary air cooler and the first booster compression main engine. 5. The oil-free medium and high pressure air compressor according to claim 3, wherein a three-stage air-water separator is installed between the supercharged primary air cooler and the second supercharged compressor main engine, The air outlet of the supercharged secondary air cooler is connected to a fourth-stage air-water separator. 6. The oil-free medium and high pressure air compressor according to claim 2, characterized in that, between the first screw compressor main engine and the screw primary air cooler, the second screw compressor main engine and the A silencer and a shock absorber are respectively installed between the screw secondary air coolers. 7. The oil-free medium and high pressure air compressor according to claim 3, further comprising a secondary lubricating device for supplying oil and lubricating the crankcase in the secondary oil-free booster compression device, wherein the The secondary lubrication device includes a booster oil pump, a booster oil cooler and a booster oil filter, the oil inlet of the booster oil pump is connected to the oil outlet of the crankcase, and the oil outlet of the booster oil pump The port is connected to the oil inlet of the supercharged oil cooler, the oil outlet of the supercharged oil cooler is connected to the oil inlet of the supercharged oil filter, and the oil outlet of the supercharged oil filter The port is communicated with the oil inlet of the crankcase. 8. The oil-free medium and high pressure air compressor according to claim 7, further comprising a primary lubricating device for supplying oil and lubricating the primary compression device, the primary lubricating device comprising a screw oil pool, Screw oil pump, screw oil cooler, screw oil filter and oil distributor, the oil inlet of the screw oil pump is connected to the screw oil pool, and the oil outlet of the screw oil pump is connected to the inlet of the screw oil cooler. The oil outlet, the oil outlet of the screw oil cooler is connected to the oil inlet of the screw oil filter, the oil outlet of the screw oil filter is connected to the oil inlet of the oil distributor, the oil The oil outlet of the distributor is connected with the bearing chamber of the first screw compression main engine and the oil inlet of the bearing chamber of the second screw compression main engine, the bearing chamber of the first screw compression main engine and the second screw The oil outlets of the bearing chambers of the main compressor are each communicated with the screw oil pool, and the pressure relief valve on the oil distributor is also communicated with the screw oil pool. 9. The oil-free medium and high pressure air compressor according to claim 8, wherein the screw primary air cooler, the screw secondary air cooler, the supercharged primary air cooler, the supercharged secondary air cooler The cooling inlets of the cooler, the supercharged oil cooler and the screw oil cooler are each connected to the water inlet pipe, the screw primary air cooler, the screw secondary air cooler, the supercharged primary air cooler, the supercharged The cooling liquid outlets of the secondary air cooler, the supercharged oil cooler and the screw oil cooler are each communicated with the water outlet pipe. 10 . The oil-free medium and high pressure air compressor according to claim 1 , wherein an air filter and an air intake valve are also installed at the air inlet of the first screw compressor main engine. 11 .

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