CN108825478B - Air compressor control system - Google Patents
Air compressor control system Download PDFInfo
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- CN108825478B CN108825478B CN201810878640.0A CN201810878640A CN108825478B CN 108825478 B CN108825478 B CN 108825478B CN 201810878640 A CN201810878640 A CN 201810878640A CN 108825478 B CN108825478 B CN 108825478B
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- gas
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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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/03—Stopping, starting, unloading or idling control by means of valves
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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
- 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
- F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses an air compressor control system which is characterized by comprising an oil-gas separator, a two-stage compressor, a discharge line and a control line, wherein the oil-gas separator is connected with the two-stage compressor; the oil-gas separator is used for separating an oil-gas mixture and discharging compressed gas; the two-stage compressor is used for compressing air; the discharge line is connected with a two-stage compression chamber and an oil-gas separator in the two-stage compressor; the control circuit comprises a switch valve control circuit and a stepless regulation control circuit which are arranged in parallel. The invention is provided with two modes of controlling the two-stage compressor by the control circuit, the suction flow of the two-stage compressor can be adjusted steplessly by the control circuit, the exhaust pressure of the two-stage compressor is always maintained at a stable value, and in addition, the air supplementing of the two-stage compressor can be realized by the control circuit when the control circuit is in no-load, so that the no-load noise of the two-stage compressor is reduced.
Description
Technical Field
The invention relates to the technical field of air compressors, in particular to an air compressor control system.
Background
At present, the air compressor is mainly used in industries such as foundation engineering construction, drilling, petroleum, shipyards and the like, and provides continuous compressed air for various devices. The air compressor is generally used in a harsher environment, the existing air compressor is controlled by opening and closing an air inlet valve to load and unload so as to adjust air pressure, namely when air consumption is reduced, the air pressure is increased, when the air consumption reaches an upper limit pressure, the air compressor is closed to enable the air compressor to be in an idle state, no air is extruded, at the moment, the air compressor does idle work, when the air pressure is lower than a lower limit pressure, the air inlet valve is opened and loaded, and the working mode can bring unstable air pressure to influence the product quality. When the air pressure is high, the load of the motor increases, and the power consumption increases. When the gas consumption is low and the gas production is high, the air compressor is unloaded, the motor is in an idle state, and idle work is performed, so that energy is wasted. And when the air pressure is high, the leakage of the pipeline is also an expression of electricity consumption. The above-described working methods have failed to meet the development of the modern industry.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the technical problem of providing an air compressor control system.
The technical scheme adopted by the invention for solving the technical problems is an air compressor control system, which is characterized by comprising the following components:
the oil-gas separator is used for separating the oil-gas mixture and discharging compressed gas;
the double-stage compressor comprises an air inlet valve, a valve driver, a first-stage compression chamber and a second-stage compression chamber, wherein the valve driver is used for driving the air inlet valve so as to control the opening, the opening angle and the closing of the air inlet valve;
a discharge line connecting a two-stage compression chamber in the two-stage compressor and the oil-gas separator;
the control circuit comprises a switch valve control circuit and a stepless regulation control circuit which are arranged in parallel, and the switch valve control circuit is used for controlling the opening and closing of a valve driver; the stepless regulation control circuit is used for controlling the driving force of the valve driver and further controlling the opening angle of the air inlet valve; the on-off valve control circuit and the stepless regulation control circuit alternately control the opening and closing states of the air inlet valve.
Preferably, the oil separator further comprises a first oil return line, the first oil return line is connected with the oil separator and the two-stage compressor, and oil separated from the oil separator is split into a first-stage compression chamber and a second-stage compression chamber in the two-stage compressor through the first oil return line.
Preferably, the oil separator further comprises a second oil return line, wherein the oil separator comprises a first-stage separation chamber and a second-stage separation chamber, the first oil return line is connected with the first-stage separation chamber and the two-stage compressor, and the second oil return line is connected with the second-stage separation chamber and the two-stage compressor.
Preferably, the control circuit further comprises a first main circuit and a second main circuit; the oil-gas separator, the first main circuit, the switch valve control circuit and the stepless regulation control circuit which are arranged in parallel, and the second main circuit and the valve driver are sequentially connected.
Preferably, the stepless regulation control circuit comprises a first control valve, an inverse proportion valve and a first auxiliary circuit, and the first auxiliary circuit is sequentially connected with a first main circuit, the first control valve, the inverse proportion valve and a second main circuit.
Preferably, the switch valve control circuit comprises a second control valve and a second auxiliary circuit, and the second auxiliary circuit is sequentially connected with the first main circuit, the second control valve and the second main circuit.
Preferably, the control circuit further comprises a blow-off valve comprising a first cavity, a first slider slidable in the first cavity, a first interface, a second interface, and a third interface; the first cavity is wide in left and narrow in right; the first sliding block is matched with the first cavity, and the first sliding block is wide in left and narrow in right; the first interface is communicated with the left end of the first cavity, the second interface is communicated with the right end of the first cavity, the third interface is arranged on the side of the emptying valve and is communicated with the first cavity, and the first sliding block slides rightwards to block the communication between the second interface and the third interface; the first interface is communicated with the intersection of the switch valve control circuit and the second main circuit, the first interface is also communicated with a second auxiliary circuit between the first control valve and the inverse proportion valve, the second interface is communicated with the oil-gas separator, and the third interface is communicated to the outside of an air inlet valve of the two-stage compressor.
Preferably, the control circuit further comprises an empty-load air compensating valve comprising a second cavity, a second slider with a spring, a fourth interface and a fifth interface; the second sliding block is connected with the intersection of the switch valve control circuit and the second main circuit, the second sliding block is also connected with a second auxiliary circuit between the first control valve and the inverse proportion valve, the fourth interface is communicated with the first-stage compression chamber, and the fifth interface is communicated with the oil-gas separator.
Preferably, the first main line is provided with a gas-water separator; the gas-water separator is provided with a condensed water outlet and a sealing valve block with a spring for sealing the condensed water outlet.
Preferably, the first oil return line comprises an oil filter, a T-shaped temperature control valve and an oil cooler which are connected in sequence.
The invention is provided with two modes of controlling the two-stage compressor by the control circuit, the suction flow of the two-stage compressor can be steplessly regulated by the control circuit, the exhaust pressure of the two-stage compressor is always maintained at a stable value, and in addition, the air supplementing of the two-stage compressor can be realized by the control circuit when the control circuit is in no-load, so that the no-load noise of the two-stage compressor is reduced.
Drawings
FIG. 1 is a circuit diagram of a system for controlling a dual stage compressor in accordance with the present invention;
FIG. 2 is a schematic perspective view of a dual stage compressor according to the present invention;
FIG. 3 is a top view of a dual stage compressor according to the present invention;
FIG. 4 is a cross-sectional view of a no-load supplemental valve of the present invention;
FIG. 5 is a cross-sectional view of an evacuation valve of the present invention;
FIG. 6 is a partial cross-sectional view of a gas-water separator of the present invention;
fig. 7 is a schematic perspective view of a reverse proportion valve in the present invention.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Referring to fig. 1 to 7, the present invention discloses an air compressor control system, which is characterized by comprising an oil-gas separator 100, a two-stage compressor 200, a discharge line 300, a control line 400, a first oil return line 500 and a second oil return line 600; the two-stage compressor 200 absorbs external air, compresses the external air and mixes the external air with cooling oil to form an oil-gas mixture, the oil-gas mixture is discharged into the oil-gas separator 100 through the discharge line 300, the oil-gas separator 100 separates the oil-gas mixture, part of gas is discharged from the oil-gas separator 100, part of gas flows through the control line 400, the suction flow rate of the two-stage compressor 200 is controlled through the control line 400, and the oil separated from the oil-gas separator 100 is cooled and then flows into the first-stage compression chamber and the second-stage compression chamber of the two-stage compressor 200, so that the oil is circulated and mixed with the air sucked in the two-stage compressor 200.
The oil-gas separator 100 is used for separating an oil-gas mixture and discharging compressed gas, the oil-gas separator 100 is provided with an exhaust pressure valve 110, the exhaust pressure valve 110 in the oil-gas separator 100 is opened when reaching a preset pressure, and the gas in the oil-gas separator 100 is discharged through the exhaust pressure valve 110. The exhaust pressure valve 110 is connected to a cooler 120, and the cooler 120 is used for cooling the gas exhausted through the exhaust pressure valve 110; the temperature of the gas discharged through the discharge pressure valve 110 is reduced by about 15 degrees from the ambient temperature. When the oil-gas separator 100 separates oil and gas, the oil-gas mixture in the oil-gas separator 100 is separated by controlling the pressure in the oil-gas separator 100.
The two-stage compressor 200 is for compressing air; the two-stage compressor 200 comprises an air inlet valve 210, a valve driver 220, a first-stage compression chamber and a second-stage compression chamber, wherein the valve driver 220 is used for driving the air inlet valve 210 so as to control the opening, the opening angle and the closing of the air inlet valve 210; the dual stage compressor 200 also has an air filter 230, in this embodiment, the inlet valve 210 is opened at an angle between 0-90 degrees.
The specific process of compressing air by the two-stage compressor 200 is as follows: the two-stage compressor 200 sucks air from the outside, the air passes through the air filter 230, the air inlet valve 210 to the first stage compression chamber where the air and the cooling oil are mixed and cooled and an oil-gas mixture is formed; the oil-gas mixture enters a secondary compression chamber, and the oil-gas mixture is mixed with cooling oil in the secondary compression chamber, so that the oil-gas mixture is further mixed and cooled; the two-stage compressed oil and gas mixture is discharged into the oil and gas separator 100 through the discharge line 300.
The control circuit 400 includes a switching valve control circuit 410 and a stepless adjustment control circuit 420 arranged in parallel, the switching valve control circuit 410 being used to control the opening and closing of the valve actuator 220; the stepless regulation control circuit 420 is used for controlling the driving force of the valve driver 220 and further controlling the opening angle of the air inlet valve 210; the on-off valve control line 410 and the stepless adjustment control line 420 alternately control the open-close state of the intake valve 210.
Specifically, two modes of the dual-stage compressor 200, namely, a stepless regulation mode and a switching mode, can be controlled by the control circuit 400.
In the on-off mode, the opening and closing of the intake valve 210 is controlled through the on-off valve control line 410; when the air inlet valve 210 is opened, the two-stage compressor 200 is in a loading state, and the two-stage compressor 200 absorbs a large amount of outside air; when the intake valve 210 is closed, the two-stage compressor 200 is in an idle state, and the two-stage compressor 200 only absorbs a small amount of gas from the throttle intake orifice 211 on the intake valve 210, and the two-stage compressor 200 absorbs a small amount of gas when in idle state in order to maintain the pressure in the two-stage compressor 200 at about 3 bar.
More specifically, the valve actuator 220 is supplied with air through the on-off valve control line 410, and in this embodiment, the valve actuator 220 may be a cylinder, that is, the air is supplied through the on-off valve control line 410, and the air intake valve 210 is driven by the air cylinder, so that the air intake valve 210 is opened and closed.
In the stepless adjustment mode: the stepless regulation control circuit 420 controls the opening angle of the air inlet valve 210 by controlling the air supply pressure, specifically, the stepless regulation control circuit 420 supplies air to the valve driver 220, and in this embodiment, the valve driver 220 is an air cylinder; by controlling the supply air pressure, the opening degree of the cylinder is controlled, and the opening angle of the intake valve 210 is further controlled, thereby controlling the intake air flow rate of the two-stage compressor 200.
Preferably, the oil separator further comprises a first oil return line 500, wherein the first oil return line 500 connects the oil separator 100 and the two-stage compressor 200, and the oil separated from the oil separator 100 is split into a first-stage compression chamber and a second-stage compression chamber in the two-stage compressor 200 through the first oil return line 500. The oil split into the primary compression chamber and the secondary compression chamber is compressed and mixed with air.
Preferably, the oil-gas separator 100 further comprises a second oil return line 600, wherein the oil-gas separator 100 comprises a first separation chamber 120 and a second separation chamber 130, the first oil return line 500 is connected with the first separation chamber 120 and the two-stage compressor 200, the second oil return line 600 is connected with the second separation chamber 130 and the two-stage compressor 200, in particular, oil-gas separation is performed through two stages, so that oil and gas are separated more thoroughly, in a specific separation process, a large amount of oil is separated from the first separation chamber 120, the oil separated from the second separation chamber 130 is far smaller than the oil-gas mixture in the first separation chamber 120, the particles tend to be smaller, the purity is higher, and in the second separation chamber 130, the separated oil can directly convey cooling oil to the two-stage compressor 200 through the second oil return line 600, and the second oil return line 600 can also convey cooling oil to the first compression chamber and the second compression chamber.
Preferably, the control circuit 400 further includes a first main circuit 430 and a second main circuit 440; the oil-gas separator 100, the first main circuit 430, the on-off valve control circuit 410, the stepless regulation control circuit 420, the second main circuit 440 and the valve driver 220 are sequentially connected, specifically, in the case of loading the two-stage compressor 200, the two-stage compressor 200 sucks air, compresses the air-gas mixture into an oil-gas mixture and discharges the oil-gas mixture into the oil-gas separator 100, a part of gas in the oil-gas separator 100 is discharged through the exhaust pressure valve 110, and the other part of gas flows through the control circuit 400 to control the opening state of the air inlet valve 210.
Preferably, the stepless regulation control circuit 420 includes a first control valve 421, a counter proportion valve 422 and a first secondary circuit 423, where the first secondary circuit 423 is sequentially connected to the first main circuit 430, the first control valve 421, the counter proportion valve 422 and the second main circuit 440, specifically, the first control valve 421 controls on-off of the gas in the stepless regulation control circuit 420, when the stepless regulation control circuit 420 is ventilated, the gas flows through the first main circuit 430, the first control valve 421, the counter proportion valve 422 and the second main circuit 440 to supply the gas to the valve driver 220, and the counter proportion valve 422 is provided with a muffler 422a and is used in cooperation with the counter proportion valve 422, when the counter proportion valve 422 acts and regulates the control pressure, the redundant compressed air is discharged from the mounting port where the muffler 422a is mounted, so as to reduce and improve the noise of the compressed air discharged to the outside. The inverse ratio valve can adjust the pressure ratio of the inlet air and the outlet air, and in this embodiment, the first control valve 421 is a two-position three-way valve, and is used for controlling the on-off of the stepless adjustment control circuit 420.
When the gas in the gas-oil separator 100 flows through the inverse proportional valve 422, the larger the gas pressure flowing into the inverse proportional valve 422, the smaller the gas pressure flowing out of the inverse proportional valve 422, the stability of the gas flow absorbed by the two-stage compressor 200 can be ensured when the operation of the two-stage compressor is controlled by the stepless regulation control circuit 420, when the gas pressure in the gas-oil separator 100 is larger than the set value, the gas in the gas-oil separator 100 flows into the inverse proportional valve 422, the inverse proportional valve 422 outputs smaller gas pressure, the inverse proportional valve 422 can discharge gas, when the gas pressure flowing through the inverse proportional valve is larger, the amount of the gas discharged by the inverse proportional valve 422 is increased, the gas pressure flowing out of the inverse proportional valve 422 is reduced, so that the opening angle of the gas inlet valve 210 is reduced, the two-stage compressor 200 sucks smaller flow of air, the storage amount of the gas in the gas-oil separator 100 is reduced, the pressure in the gas-oil separator 100 is further reduced, and the pressure in the gas-oil separator 100 is stabilized around the preset pressure value.
Conversely, if the gas pressure in the oil separator 100 is smaller than the preset pressure, the amount of the bleed gas is reduced by the inverse proportion valve 422, so that the gas pressure flowing out from the inverse proportion valve 422 becomes larger; thereby, the opening angle of the air inlet valve 210 is increased, so that the two-stage compressor 200 can suck air with larger flow, the air amount in the oil-gas separator 100 is increased, the pressure in the oil-gas separator 100 is increased, and the pressure in the oil-gas separator 100 is stabilized at about a preset pressure value.
That is, the two-stage compressor 200 is maintained in a stable and balanced operating state by adjusting the two-stage compressor 200 in a loaded state through the stepless adjustment control circuit 420.
Preferably, the on-off valve control circuit 410 includes a second control valve 411 and a second auxiliary circuit 412, and the second auxiliary circuit 412 is sequentially connected to the first main circuit 430, the second control valve 411 and the second main circuit 440, and controls the opening and closing of the intake valve 210 through the on-off valve control circuit 410; specifically, when the valve is opened, the opening angle of the air inlet valve 210 is 90 degrees, and when the valve is closed, the opening angle of the air inlet valve 210 is 0 degrees, and the second control valve 411 is a two-position three-way valve for controlling the on-off of the on-off valve control circuit 410.
Preferably, the control circuit 400 further comprises a vent valve 450, the vent valve 450 comprising a first cavity 451, a first slider 452 slidable in the first cavity 451, a first port 453, a second port 454 and a third port 455; the first cavity 451 is wide on the left and narrow on the right; the first slider 452 is adapted to the first cavity 451, and the first slider 452 is wide on the left and narrow on the right; the first port 453 is communicated with the left end of the first cavity 451, the second port 454 is communicated with the right end of the first cavity 451, the third port 455 is arranged on the side of the blow valve 450 and is communicated with the first cavity 451, and the first slider 452 slides rightwards to block the communication between the second port 454 and the third port 455; the first port 453 is communicated with the intersection of the switch valve control circuit 410 and the second main circuit 440, the first port 453 is also communicated with the first auxiliary circuit 423 between the first control valve 421 and the inverse proportion valve 422, the second port 454 is communicated with the oil-gas separator 100, and the third port 455 is communicated to the outside of the inlet valve 210 of the two-stage compressor 200.
Under the no-load condition of the two-stage compressor 200, the first control valve 421 and the second control valve 411 are both in an off state, gas in the oil-gas separator 100 cannot be immediately dispersed (the exhaust pressure valve 110 can only be opened when the gas pressure in the oil-gas separator 100 reaches a preset value), no gas flow passes through the left end of the first slider 452 in the exhaust valve 450, so that the pressure received by the left end of the first slider 452 is atmospheric pressure, the pressure received by the right end of the first slider 452 is received from the oil-gas separator 100 (the gas in the oil-gas separator 100 cannot be immediately dispersed), the pressure of the oil-gas separator 100 is far higher than the atmospheric pressure, the first slider 452 is pushed left, so that the second interface 454 and the third interface 455 are communicated, and residual gas in the oil-gas separator 100 is discharged out of the gas inlet valve 210 of the two-stage compressor 200 through the exhaust valve 450. The vent valve 450 is provided with an adjusting nut to adjust the caliber of the third interface 455, and by adjusting the caliber of the third interface 455, the air pressure in the oil-gas separator 100 can be adjusted, so that the efficiency of oil-gas separation is further changed, lubrication of the two-stage compressor 200 in no-load can be ensured, and the energy consumption of the two-stage compressor 200 in the unloading state can be adjusted within a reasonable range.
Under the loading condition of the two-stage compressor 200, the air pressure in the control circuit 400 is consistent with the air pressure in the oil-gas separator 100 before the air pressure does not pass through the inverse proportion valve 422, in this case, the stress area of the left end of the first slider 452 is large, the stress area of the right end of the first slider 452 is small, the pressure applied to the two is consistent, so that the whole first slider 452 is subjected to left force, and the first slider 452 slides leftwards to block the communication between the second interface 454 and the third interface 455.
Preferably, the control circuit 400 further includes an empty-load air compensating valve 460 including a second cavity 461, a second slider 462 having a spring, a fourth interface 463 and a fifth interface 464; the second slider 462 is connected to the intersection of the switching valve control line 410 and the second main line 440, the second slider 462 is further connected to the second sub-line 412 between the first control valve 421 and the inverse proportion valve 422, the fourth interface 463 is in communication with the first stage compression chamber, and the fifth interface 464 is in communication with the oil separator 100. When the two-stage compressor 200 is in idle load, the air inlet valve 210 is closed, the two-stage compressor 200 is in air inlet through the small hole on the air inlet valve 210, compressed air in the oil-gas separator 100 is communicated with the air inlet valve 210 and is discharged to the first-stage compression chamber, so that the air inlet pressure of the first-stage compression chamber in the two-stage compressor 200 is improved, and the noise of the air compressor during air operation is reduced.
Preferably, the first main line 430 is provided with a gas-water separator 431; the gas-water separator 431 is provided with a condensate outlet and a closing valve block 431a with a spring for closing the condensate outlet. The gas-water separator 431 separates water in the compressed air in a cyclone separation mode, the separated liquid water is condensed on the inner wall of the gas-water separator 431, and condensed liquid drops are settled to the bottom of the gas-water separator 431 under the action of gravity. The gas-water separator 431 is semi-automatic water discharge, and when compressed air passes through the filter 230, the water discharge is automatically closed; when the air compressor is shut down and the gas pressure in the gas-water separator 431 falls below 0.3bar, the drainer is automatically opened, and condensed water in the gas-water separator 431 is discharged.
Preferably, the first oil return line 500 includes an oil filter 510, a T-type thermo valve 520, and an oil cooler 530, which are sequentially connected, and the first oil return line 500 is used for filtering and controlling the temperature of oil.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (1)
1. An air compressor control system, comprising:
the oil-gas separator is used for separating the oil-gas mixture and discharging compressed air;
the double-stage compressor comprises an air inlet valve, a valve driver, a first-stage compression chamber and a second-stage compression chamber, wherein the valve driver is used for driving the air inlet valve so as to control the opening, the opening angle and the closing of the air inlet valve;
a discharge line connecting a two-stage compression chamber in the two-stage compressor and the oil-gas separator;
the control circuit comprises a switch valve control circuit and an electrodeless regulation control circuit which are arranged in parallel, and the switch valve control circuit is used for controlling the opening and closing of a valve driver; the stepless regulation control circuit is used for controlling the driving force of the valve driver so as to control the opening angle of the air inlet valve; the switching valve control circuit and the stepless regulation control circuit alternately control the opening and closing states of the air inlet valve;
the first oil return line is connected with the oil-gas separator and the two-stage compressor, and oil separated from the oil-gas separator is split into a first-stage compression chamber and a second-stage compression chamber in the two-stage compressor through the first oil return line;
the oil-gas separator comprises a first-stage separation chamber and a second-stage separation chamber, the first oil-gas separator is connected with the first-stage separation chamber and the two-stage compressor, and the second oil-gas separator is connected with the second-stage separation chamber and the two-stage compressor;
the control circuit further comprises a first main circuit and a second main circuit; the oil-gas separator, the first main circuit, the switch valve control circuit, the stepless regulation control circuit, the second main circuit and the valve driver are sequentially connected;
the stepless regulation control circuit comprises a first control valve, an inverse proportion valve and a first auxiliary circuit, and the first auxiliary circuit is sequentially connected with a first main circuit, the first control valve, the inverse proportion valve and a second main circuit;
the switch valve control circuit comprises a second control valve and a second auxiliary circuit, and the second auxiliary circuit is sequentially connected with the first main circuit, the second control valve and the second main circuit;
the control circuit further comprises a blow-down valve, wherein the blow-down valve comprises a first cavity, a first sliding block capable of sliding in the first cavity, a first interface, a second interface and a third interface; the first cavity is wide in left and narrow in right; the first sliding block is matched with the first cavity, and the first sliding block is wide in left and narrow in right; the first interface is communicated with the left end of the first cavity, the second interface is communicated with the right end of the first cavity, the third interface is arranged on the side of the emptying valve and is communicated with the first cavity, and the first sliding block slides rightwards to block the communication between the second interface and the third interface; the first interface is communicated with the intersection of the switch valve control circuit and the second main circuit, the first interface is also communicated with a second auxiliary circuit between the first control valve and the inverse proportion valve, the second interface is communicated with the oil-gas separator, and the third interface is communicated to the outside of an air inlet valve of the two-stage compressor;
the control circuit also comprises an idle air compensating valve, which comprises a second cavity, a second sliding block with a spring, a fourth interface and a fifth interface; the second sliding block is connected with the intersection of the switch valve control circuit and the second main circuit, the second sliding block is also connected with a second auxiliary circuit between the first control valve and the inverse proportion valve, the fourth interface is communicated with the first-stage compression chamber, and the fifth interface is communicated with the oil-gas separator;
the first main circuit is provided with a gas-water separator; the gas-water separator is provided with a condensed water outlet and a sealing valve block with a spring for sealing the condensed water outlet;
the first oil return line comprises an oil filter, a T-shaped temperature control valve and an oil cooler which are connected in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810878640.0A CN108825478B (en) | 2018-08-03 | 2018-08-03 | Air compressor control system |
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| CN201810878640.0A CN108825478B (en) | 2018-08-03 | 2018-08-03 | Air compressor control system |
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| CN108825478A CN108825478A (en) | 2018-11-16 |
| CN108825478B true CN108825478B (en) | 2023-09-19 |
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| CN101943163B (en) * | 2010-09-10 | 2011-12-07 | 宁波鲍斯能源装备股份有限公司 | Two-stage medium-pressure screw-type air compressor set |
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| JP2001090683A (en) * | 1999-09-22 | 2001-04-03 | Kobe Steel Ltd | Intake control valve for oil-cooled compressor |
| CN201396284Y (en) * | 2009-05-09 | 2010-02-03 | 绍兴瑞气压缩机有限公司 | Gas quantity proportion regulation control system of air compressor |
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| CN108825478A (en) | 2018-11-16 |
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