CN111022301B - Oilless medium-high pressure air compressor - Google Patents
Oilless medium-high pressure air compressor Download PDFInfo
- Publication number
- CN111022301B CN111022301B CN201911346047.2A CN201911346047A CN111022301B CN 111022301 B CN111022301 B CN 111022301B CN 201911346047 A CN201911346047 A CN 201911346047A CN 111022301 B CN111022301 B CN 111022301B
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- oil
- screw
- air
- booster
- compression
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- 230000006835 compression Effects 0.000 claims abstract description 183
- 238000007906 compression Methods 0.000 claims abstract description 183
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000001816 cooling Methods 0.000 claims abstract description 33
- 239000000110 cooling liquid Substances 0.000 claims abstract description 16
- 239000003921 oil Substances 0.000 claims description 147
- 238000005461 lubrication Methods 0.000 claims description 21
- 239000010721 machine oil Substances 0.000 claims description 8
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 230000035939 shock Effects 0.000 claims description 2
- 230000003584 silencer Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/06—Combinations of two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/16—Filtration; Moisture separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0092—Removing solid or liquid contaminants from the gas under pumping, e.g. by filtering or deposition; Purging; Scrubbing; Cleaning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/025—Lubrication; Lubricant separation using a lubricant pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/026—Lubricant separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
- F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Compressor (AREA)
Abstract
The invention discloses an oilless medium-high pressure air compressor which comprises a compressor unit and a cooling pipeline, wherein the compressor unit comprises a primary compression device and a secondary oilless booster compression device, the primary compression device comprises a first screw compression host and a second screw compression host which are connected in series, the secondary oilless booster compression device comprises a first booster compression host and a second booster compression host, an air outlet of the second screw compression host is communicated with an air inlet of the first booster compression host, the cooling pipeline comprises a water inlet pipe and a water outlet pipe, cooling liquid inlets of the first screw compression host, the second screw compression host, the first booster compression host and the second booster compression host are respectively communicated with the water inlet pipe, and cooling liquid outlets of the first screw compression host, the second screw compression host, the first booster compression host and the second booster compression host are respectively communicated with the water outlet pipe. The cooling device of the oil-free medium-high pressure air compressor has the advantages of simple structure and good cooling effect.
Description
Technical Field
The invention relates to the field of power equipment, in particular to an oilless medium-high pressure air compressor.
Background
An air compressor is a device for compressing gas, and is similar in construction to a water pump, most of which operate in a reciprocating piston type, a rotary vane type, or a rotary screw type.
The air compressor comprises two links of air compression and gas pressurization in the compression operation, and the two links respectively compress the gas to raise the pressure and the temperature of the gas, so that a cooling device is arranged in both links. In the air compression link, a primary screw compression main machine is usually adopted to compress air, if high-pressure air is required to be output, a plurality of primary screw compression main machines are required to be added, but the heat generated by the equipment in operation is more, correspondingly, a higher requirement is provided for a cooling device, but the current cooling device is difficult to adapt to the working requirement of the equipment due to the complex structure and poor cooling effect of the current cooling device.
Therefore, there is a need for an oil-free medium-high pressure air compressor with a simple structure and a good cooling effect for a cooling device to overcome the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to provide an oil-free medium-high pressure air compressor with a simple structure and a good cooling effect.
In order to achieve the above object, the oil-free medium-high pressure air compressor of the present invention comprises a compressor unit and a cooling pipeline for cooling the compressor unit, wherein the compressor unit comprises a primary compression device and a secondary oil-free pressurizing compression device for pressurizing air compressed by the primary compression device, the oil-free medium-high pressure air compressor is characterized in that the primary compression device comprises a first screw compression host and a second screw compression host which are connected in series, an air outlet of the first screw compression host is communicated with an air inlet of the second screw compression host, the secondary oil-free pressurizing compression device comprises a first pressurizing compression host and a second pressurizing compression host for pressurizing air compressed by the first pressurizing compression host, an air outlet of the second screw compression host is communicated with an air inlet of the first pressurizing compression host, the cooling pipeline comprises a water inlet pipe and a water outlet pipe, cooling liquid inlets of the first screw compression host, the second screw compression host, the first pressurizing compression host and the second pressurizing compression host are respectively communicated with the water inlet of the second screw compression host, and cooling liquid outlets of the first pressurizing compression host and the second pressurizing host are respectively communicated with the pressurizing water inlet of the first screw compression host.
Preferably, the primary compression device further comprises a first screw rod air cooler and a second screw rod air cooler, the air outlet of the first screw rod compression host is communicated with the air inlet of the first screw rod air cooler, the air outlet of the first screw rod air cooler is communicated with the air inlet of the second screw rod compression host, the air outlet of the second screw rod compression host is communicated with the air inlet of the second screw rod air cooler, and the air outlet of the second screw rod air cooler is communicated with the air inlet of the first booster compression host.
Preferably, the second-stage oil-free pressurizing compression device further comprises a pressurizing first-stage gas cooler and a pressurizing second-stage gas cooler, the gas outlet of the first pressurizing compression host is communicated with the gas inlet of the pressurizing first-stage gas cooler, the gas outlet of the pressurizing first-stage gas cooler is communicated with the gas inlet of the second pressurizing compression host, and the gas outlet of the second pressurizing compression host is communicated with the gas inlet of the pressurizing second-stage gas cooler.
Preferably, a first-stage gas-water separator is arranged between the first-stage gas cooler of the screw rod and the second screw rod compression host, and a second-stage gas-water separator is arranged between the second-stage gas cooler of the screw rod and the first booster compression host.
Preferably, a third-stage gas-water separator is arranged between the first booster compressor and the second booster compressor, and the air outlet of the second booster compressor is communicated with a fourth-stage gas-water separator.
Preferably, a silencer and a shock absorber are correspondingly arranged between the first screw compression main machine and the screw primary gas cooler and between the second screw compression main machine and the screw secondary gas cooler respectively.
Preferably, the oil-free medium-high pressure air compressor further comprises a secondary lubrication device for lubricating a crankcase in the secondary oil-free booster compression device, wherein the secondary lubrication device comprises a booster oil pump, a booster oil cooler and a booster oil filter, an oil inlet of the booster oil pump is communicated with an oil outlet of the crankcase, an oil outlet of the booster oil pump is communicated with an oil inlet of the booster oil cooler, an oil outlet of the booster oil cooler is communicated with an oil inlet of the booster oil filter, and an oil outlet of the booster oil filter is communicated with an oil inlet of the crankcase.
Preferably, the oil-free medium-high pressure air compressor further comprises a primary lubrication device for lubricating the primary compression device, wherein the primary lubrication device comprises a screw machine oil pool, a screw oil pump, a screw oil cooler, a screw oil filter and an oil distributor, an oil inlet of the screw oil pump is communicated with the screw machine oil pool, an oil outlet of the screw oil pump is communicated with an oil inlet of the screw oil cooler, an oil outlet of the screw oil cooler is communicated with an oil inlet of the screw oil filter, an oil outlet of the screw oil filter is communicated with an oil inlet of the oil distributor, oil outlets of the oil distributor are respectively communicated with oil inlets of a bearing chamber of the first screw compression host and a bearing chamber of the second screw compression host, oil outlets of the bearing chamber of the first screw compression host and the bearing chamber of the second screw compression host are respectively communicated with the screw machine oil pool, and a pressure release valve on the oil distributor is also communicated with the screw machine oil pool.
Preferably, the cooling inlets of the screw primary air cooler, the screw secondary air cooler, the booster primary air cooler, the booster secondary air cooler, the booster oil cooler and the screw oil cooler are respectively communicated with the water inlet pipe, and the cooling liquid outlets of the screw primary air cooler, the screw secondary air cooler, the booster primary air cooler, the booster secondary air cooler, the booster oil cooler and the screw oil cooler are respectively communicated with the water outlet pipe.
Preferably, an air filter and an air inlet valve are further installed at the air inlet of the first screw compression main machine.
Compared with the prior art, the cooling liquid inlets of the first screw compression host, the second screw compression host, the first booster compression host and the second booster compression host are respectively communicated with the water inlet pipe, the cooling liquid outlets of the first screw compression host, the second screw compression host, the first booster compression host and the second booster compression host are respectively communicated with the water outlet pipe, and the first screw compression host, the second screw compression host, the first booster compression host and the second booster compression host are respectively and independently communicated with the cooling pipeline, so that heat generated during working can be effectively and rapidly discharged, and therefore, the oil-free medium-high pressure air compressor has good cooling effect, and is easy to install and overhaul due to the relatively simple structure of the cooling pipeline.
Drawings
FIG. 1 is a schematic diagram of the piping connection of the oil-free medium-high pressure air compressor of the present invention.
Detailed Description
In order to describe the technical content and constructional features of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
As shown in fig. 1, the oil-free medium-high pressure air compressor 100 of the present invention comprises a compressor unit 10 and a cooling pipeline 20 for cooling the compressor unit 10, wherein the compressor unit 10 comprises a primary compression device 11 and a secondary oil-free booster compression device 12 for boosting the air compressed by the primary compression device 11, the primary compression device 11 comprises a first screw compression host 111 and a second screw compression host 112 which are connected in series, the air outlet of the first screw compression host 111 is communicated with the air inlet of the second screw compression host 112, the secondary oil-free booster compression device 12 comprises a first booster compression host 121 and a second booster compression host 122 for compressing and boosting the air compressed by the first booster compression host 121 again, the air outlet of the second screw compression host 112 is communicated with the air inlet of the first booster compression host 121, the cooling pipeline 20 comprises a water inlet pipe 21 and a water outlet pipe 22, wherein the cooling liquid inlets of the first screw compression host 111, the second screw compression host 112, the first booster compression host 121 and the second booster compression host 122 are respectively communicated with the water inlet pipe 21, the cooling liquid outlets of the first screw compression host 111, the second screw compression host 112, the first booster compression host 121 and the second booster compression host 122 are respectively communicated with the water outlet pipe 22, and the first screw compression host 111, the second screw compression host 112, the first booster compression host 121 and the second booster compression host 122 are respectively and independently communicated with the cooling pipeline 20, so that heat generated during working can be effectively and rapidly discharged, and the oil-free medium-high pressure air compressor 100 has good cooling effect, and is easy to install and overhaul due to the relatively simple structure of the cooling pipeline 20. In addition, since the primary compression device 11 comprises two sets of screw compression hosts connected in series, the pressure of the compressed air output from the primary compression device 11 is relatively high, so that the compressor unit 10 can output compressed air with higher pressure finally, and the device is suitable for occasions of outputting medium-high pressure gas. For example, the first screw compressor main unit 111 and the second screw compressor main unit 112 are driven by a motor through a speed increasing gear box, each is an oil-free twin screw main unit, and the first booster compressor main unit 121 and the second booster compressor main unit 122 are each an oil-free compression piston main unit, and are driven by a motor through a belt transmission device, but not limited thereto. Specifically, an air filter 119 and an air intake valve 110 are also installed at the air intake of the first screw compressor main unit 111 to purify the air inputted into the primary compression device 11. More specifically, the following is:
As shown in fig. 1, the primary compression device 11 further includes a first screw compressor 113 and a second screw compressor 114, where the air outlet of the first screw compressor 111 is connected to the air inlet of the first screw compressor 113, the air outlet of the first screw compressor 113 is connected to the air inlet of the second screw compressor 112 and the air inlet of the second screw compressor 114, the air outlet of the second screw compressor 112 is connected to the air inlet of the second screw compressor 114, the air outlet of the second screw compressor 114 is connected to the air inlet of the first booster compressor 121, and the first screw compressor 113 and the second screw compressor 114 can cool the compressed air, so as to improve the compression efficiency and the energy efficiency ratio of the device. Specifically, the second-stage oil-free booster compressor 12 further includes a booster primary air cooler 123 and a booster secondary air cooler 124, the air outlet of the first booster compressor 121 is connected to the air inlet of the booster primary air cooler 123, the air outlet of the booster primary air cooler 123 is connected to the air inlet of the second booster compressor 122, the air outlet of the second booster compressor 122 is connected to the air inlet of the booster secondary air cooler 124, the booster primary air cooler 123 and the booster secondary air cooler 124 can reduce the temperature of the compressed air after boosting, thereby effectively reducing the exhaust temperature, and being beneficial to improving the compression efficiency and the energy efficiency ratio of the device. Preferably, the two-stage oil-free booster compression device 12 comprises at least two stages of oil-free compression, and a second booster compression host 122 is connected in series after the first booster compression host 121 to ensure the stability of the air supply quantity and the air supply pressure. More specifically, a primary gas-water separator 115 is installed between the primary screw gas cooler 113 and the second screw compression host 112, a secondary gas-water separator 116 is installed between the secondary screw gas cooler 114 and the first booster compression host 121, a tertiary gas-water separator 125 is installed between the primary booster gas cooler 123 and the second booster compression host 122, the air outlet of the secondary booster gas cooler 124 is communicated with a quaternary gas-water separator 126, and the arranged gas-water separator can ensure that condensed water in compressed air is separated before the compressed air enters the following compressors so as not to damage the following compressors. In order to reduce or eliminate sound or vibration generated by the primary compression device 11 during operation, a muffler 117 and a damper 118 are respectively installed between the first screw compressor main unit 111 and the screw primary air cooler 113, and between the second screw compressor main unit 112 and the screw secondary air cooler 114.
As shown in fig. 1, the oil-free medium-high pressure air compressor 100 of the present invention further includes a secondary lubrication device 30 for supplying oil to lubricate the crankcase 120 in the secondary oil-free booster compressor 12, and a primary lubrication device 40 for supplying oil to lubricate the primary compressor 11, where the secondary lubrication device 30 includes a booster oil pump 31, a booster oil cooler 32, and a booster oil filter 33, an oil inlet of the booster oil pump 31 is connected to an oil outlet of the crankcase 120, an oil outlet of the booster oil pump 31 is connected to an oil inlet of the booster oil cooler 32, an oil outlet of the booster oil cooler 32 is connected to an oil inlet of the booster oil filter 33, and an oil outlet of the booster oil filter 33 is connected to an oil inlet of the crankcase 120, so that the secondary lubrication device 30 injects circulating lubrication fluid into the crankcase 120 to ensure that the secondary oil-free booster compressor 12 can keep stable and smooth operation. For the convenience of observation and control of the lubrication oil passage, the secondary lubrication device 30 further includes a secondary oil pressure sensor 34 and a secondary oil temperature sensor 35 that communicate with the oil outlet of the pressurized oil filter 33. Specifically, the primary lubrication device 40 includes a screw oil tank 41, a screw oil pump 42, a screw oil cooler 43, a screw oil filter 44, and an oil distributor 45, wherein an oil inlet of the screw oil pump 42 is connected to the screw oil tank 41, an oil outlet of the screw oil pump 42 is connected to an oil inlet of the screw oil cooler 43, an oil outlet of the screw oil cooler 43 is connected to an oil inlet of the screw oil filter 44, an oil outlet of the screw oil filter 44 is connected to an oil inlet of the oil distributor 45, oil outlets of the oil distributor 45 are respectively connected to a bearing chamber of the first screw compression host 111 and an oil inlet of a bearing chamber of the second screw compression host 112, the bearing chamber of the first screw compression host 111 and the oil outlet of the bearing chamber of the second screw compression host 112 are respectively connected to the screw oil tank 41, and the oil distributor 45 is also connected to the screw oil tank 41, so that the primary lubrication device 40 injects circulating lubrication fluid into the primary compression device 11, and distributes lubrication fluid to ensure ordered and balance stability of the lubrication fluid path. For easy observation and control of the lubrication oil passage, the oil distributor 45 is provided with an oil temperature sensor 46 and an oil pressure sensor 47. Further, the cooling liquid inlets of the screw primary air cooler 113, the screw secondary air cooler 114, the booster primary air cooler 123, the booster secondary air cooler 124, the booster oil cooler 32 and the screw oil cooler 43 are respectively communicated with the water inlet pipe 21, and the cooling liquid outlets of the screw primary air cooler 113, the screw secondary air cooler 114, the booster primary air cooler 123, the booster secondary air cooler 124, the booster oil cooler 32 and the screw oil cooler 43 are respectively communicated with the water outlet pipe 22 so as to ensure the cooling efficiency.
In order to collect the condensed water generated during the operation of each device, the oil-free medium-high pressure air compressor 100 of the present invention further comprises a condensed water collecting pipe 50, and condensed water outlets of the primary air-water separator 115, the secondary air-water separator 116, the tertiary air-water separator 125 and the quaternary air-water separator 126 are respectively connected to the condensed water collecting pipe 50. A drain control solenoid valve 60, a drain pneumatic valve 70 and a check valve are respectively arranged at the condensed water outlets of the first-stage gas-water separator 115, the second-stage gas-water separator 116, the third-stage gas-water separator 125 and the fourth-stage gas-water separator 126. In addition, the oil-free medium-high pressure air compressor 100 of the present invention further comprises a blowdown control device 80, wherein the blowdown control device 80 comprises a pressure reducing valve 81, a check valve 82 and an instrument air tank 83 which are communicated with the air outlet of the secondary air-water separator 116 and are respectively communicated in sequence, wherein the air outlet of the instrument air tank 83 is communicated with the air inlet of each blowdown control electromagnetic valve 60, so that the condensate water generated by the oil-free medium-high pressure air compressor 100 can be discharged to the condensate water collecting pipe 50 through a plurality of pipelines when the oil-free medium-high pressure air compressor normally outputs compressed air. In addition, the control gas path inlet of the air inlet valve 110 is communicated with the air outlet of the secondary gas-water separator 116, so that the air inlet valve 110 can be kept in an open state when the middle-high pressure compressor 100 works, and the air inlet valve 110 is correspondingly in a closed state when the middle-high pressure compressor 100 stops, thereby realizing automatic opening and closing of air inlet. A muffler 1101 is also installed at the outlet of the control air path of the air inlet valve 110, and the muffler 1101 and the muffler 117 at the air outlet of the second screw compressor main unit 112 are mutually communicated through a vent line, so that when the oil-free medium-high pressure air compressor 100 is in the unloading mode, a very small amount of compressed air is conveniently vented and silenced, thereby realizing no-load operation of the oil-free medium-high pressure air compressor 100 and reducing energy consumption. In order to facilitate the observation and monitoring of the temperature and pressure on each pipeline, a plurality of temperature sensors, pressure sensors and pressure gauges (not fully labeled in the figure) are arranged on each pipeline according to actual needs, but the invention is not limited thereto.
The operation principle of the oil-free medium-high pressure air compressor 100 of the present invention will be described with reference to fig. 1: in the working state, the air is input into the first screw compression host 111 through the air filter 119, the air is compressed by the first screw compression host 111 and then enters the first screw primary air cooler 113 and the first-stage air-water separator 115 to be cooled and separated by water and air, the separated compressed air is then enters the second screw compression host 112 to be compressed again, the compressed air after being compressed again enters the second screw secondary air cooler 114 and the second-stage air-water separator 116 to be cooled and separated by water and air, the separated compressed air is then enters the first booster compression host 121 to be compressed by two stages, the compressed air after two stages is then enters the first booster air cooler 123 and the third-stage air-water separator 125 to be cooled and separated by water and air, the separated compressed air is then enters the second booster compression host 122 to be compressed again, and the compressed air discharged from the air outlet of the second booster compression host 122 is then enters the second booster air cooler 124 and the fourth-stage air-water separator 126 to be output to the outside.
Compared with the prior art, since the cooling liquid inlets of the first screw compression host 111, the second screw compression host 112, the first booster compression host 121 and the second booster compression host 122 are respectively communicated with the water inlet pipe 21, and the cooling liquid outlets of the first screw compression host 111, the second screw compression host 112, the first booster compression host 121 and the second booster compression host 122 are respectively communicated with the water outlet pipe 22, the first screw compression host 111, the second screw compression host 112, the first booster compression host 121 and the second booster compression host 122 are respectively and independently communicated with the cooling pipeline 20, so that heat generated during working can be effectively and rapidly discharged, and therefore, the oil-free medium-high pressure air compressor 100 has a good cooling effect, and the cooling pipeline 20 has a relatively simple structure and is easy to install and overhaul.
The foregoing disclosure is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (5)
1. The oil-free medium-high pressure air compressor comprises a compressor unit and a cooling pipeline for cooling the compressor unit, wherein the compressor unit comprises a primary compression device and a secondary oil-free pressurizing compression device for pressurizing air compressed by the primary compression device, the oil-free medium-high pressure air compressor is characterized in that the primary compression device comprises a first screw compression host and a second screw compression host which are connected in series, an air outlet of the first screw compression host is communicated with an air inlet of the second screw compression host, the secondary oil-free pressurizing compression device comprises a first pressurizing compression host and a second pressurizing compression host for pressurizing air compressed by the first pressurizing compression host again, the air outlet of the second screw compression host is communicated with the air inlet of the first booster compression host, the cooling pipeline comprises a water inlet pipe and a water outlet pipe, the cooling liquid inlets of the first screw compression host, the second screw compression host, the first booster compression host and the second booster compression host are respectively communicated with the water inlet pipe, and the cooling liquid outlets of the first screw compression host, the second screw compression host, the first booster compression host and the second booster compression host are respectively communicated with the water outlet pipe; the primary compression device further comprises a screw primary air cooler and a screw secondary air cooler, the air outlet of the first screw primary air cooler is communicated with the air inlet of the screw primary air cooler, the air outlet of the screw primary air cooler is communicated with the air inlet of the second screw primary air cooler, the air outlet of the second screw primary air cooler is communicated with 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 booster compression host; the second-stage oil-free pressurizing compression device further comprises a pressurizing primary air cooler and a pressurizing secondary air cooler, the air outlet of the first pressurizing compression host is communicated with the air inlet of the pressurizing primary air cooler, the air outlet of the pressurizing primary air cooler is communicated with the air inlet of the second pressurizing compression host, and the air outlet of the second pressurizing compression host is communicated with the air inlet of the pressurizing secondary air cooler; a first-stage gas-water separator is arranged between the first-stage gas cooler of the screw rod and the second screw rod compression host, and a second-stage gas-water separator is arranged between the second-stage gas cooler of the screw rod and the first booster compression host; the oil-free medium-high pressure air compressor further comprises a secondary lubrication device for lubricating a crankcase in the secondary oil-free booster compression device, the secondary lubrication device comprises a booster oil pump, a booster oil cooler and a booster oil filter, an oil inlet of the booster oil pump is communicated with an oil outlet of the crankcase, an oil outlet of the booster oil pump is communicated with an oil inlet of the booster oil cooler, an oil outlet of the booster oil cooler is communicated with an oil inlet of the booster oil filter, and an oil outlet of the booster oil filter is communicated with an oil inlet of the crankcase; the oil-free medium-high pressure air compressor also comprises a primary lubrication device for lubricating the primary compression device, the primary lubrication device comprises a screw machine oil pool, a screw oil pump, a screw oil cooler, a screw oil filter and an oil distributor, an oil inlet of the screw oil pump is communicated with the screw machine oil pool, an oil outlet of the screw oil pump is communicated with an oil inlet of the screw oil cooler, an oil outlet of the screw oil cooler is communicated with an oil inlet of the screw oil filter, an oil outlet of the screw oil filter is communicated with an oil inlet of the oil distributor, oil outlets of the oil distributor are respectively communicated with a bearing chamber of the first screw compression host and an oil inlet of a bearing chamber of the second screw compression host, the bearing chamber of the first screw compression host and the oil outlet of the bearing chamber of the second screw compression host are respectively communicated with the screw machine oil tank, and the pressure release valve on the oil distributor is also communicated with the screw machine oil tank.
2. The oil-free medium-high pressure air compressor of claim 1, wherein a three-stage gas-water separator is arranged between the first boost compression main machine and the second boost compression main machine, and an air outlet of the second boost compression main machine is communicated with a four-stage gas-water separator.
3. The oil-free medium-high pressure air compressor of claim 1, wherein a silencer and a shock absorber are respectively and correspondingly installed between the first screw compression main machine and the screw primary air cooler and between the second screw compression main machine and the screw secondary air cooler.
4. The oil-free medium-high pressure air compressor of claim 1, wherein the cooling inlets of the screw primary air cooler, the screw secondary air cooler, the booster primary air cooler, the booster secondary air cooler, the booster oil cooler and the screw oil cooler are respectively communicated with the water inlet pipe, and the cooling liquid outlets of the screw primary air cooler, the screw secondary air cooler, the booster primary air cooler, the booster oil cooler and the screw oil cooler are respectively communicated with the water outlet pipe.
5. The oil-free medium-high pressure air compressor of claim 1, wherein an air filter and an air intake valve are further installed at an air inlet of the first screw compression host.
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