CN110118177A - The two-stage gas compressor and its control method of double suction gas - Google Patents
The two-stage gas compressor and its control method of double suction gas Download PDFInfo
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- CN110118177A CN110118177A CN201910543008.5A CN201910543008A CN110118177A CN 110118177 A CN110118177 A CN 110118177A CN 201910543008 A CN201910543008 A CN 201910543008A CN 110118177 A CN110118177 A CN 110118177A
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- gas
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- controller
- compression host
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Classifications
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- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/02—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for several pumps connected in series or in parallel
-
- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
-
- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/08—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the rotational speed
-
- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention proposes a kind of two-stage gas compressors of double suction gas, including one stage of compression host, two-stage compression host, the level-one gas handling system connecting with one stage of compression host, the secondary inlet system connecting with two-stage compression host, the secondary motor of the primary motor of driving one stage of compression host operating and driving two-stage compression host operating；Level-one gas handling system and secondary inlet system can work independently；The one stage of compression gas of one stage of compression host discharge, which enters in two-stage compression host, carries out second-compressed as two-stage compression gas.When the gas consumption of compressed gas pipe network reduces and is lower than the capacity of two-stage compression host, stalls one stage of compression host and close level-one gas handling system；Open simultaneously secondary inlet system, ambient atmos are directly entered in two-stage compression host through second level progress system to be compressed, the maximum capacity of the gas compressor is the capacity of two-stage compression host, keeps wasted work of the gas compressor in low capacity low and runs smoothly.
Description
Technical field
The invention belongs to gas compressor fields, and in particular to a kind of the two-stage gas compressor and its controlling party of double suction gas
Method.
Background technique
Gas compressor includes air compressor, nitrogen compressor etc., and two-stage gas compressor is mostly screw, predominantly
Single host compressor and double host two kinds of forms of compressor.
Double host compressors, the greater trochanter compression host driven by a motor by shaft coupling is as level-one pressure
Contracting, the lesser trochanter compression host that another motor is driven by shaft coupling is as two-stage compression.Ambient atmos enter level-one
It compresses in host, gas is discharged after the completion of one stage of compression and enters in two-stage compression host, carries out two-stage compression, two-stage compression is through oil
After gas separation, compressed gas pipe network is flowed into after cooling.It is primarily present following problem: only a set of gas handling system, into compression
The gas of machine first must just can enter in two-stage compression host through one stage of compression host；The capacity of compressor not full load, one
Grade compression host still needs to work, and efficiency is low, when especially actual displacement is lower than the 80% of rated discharge amount.
Summary of the invention
Present invention seek to address that the technical problems existing in the prior art, the first purpose of the invention is to provide a kind of double
The two-stage gas compressor of air-breathing is also setting a set of gas handling system at two-stage compression host, when the capacity of compressor is discontented
When load, so that the first compression host is stopped working, thus reduce energy consumption.A second object of the present invention is to provide a kind of aforementioned double suctions
The control method of the two-stage gas compressor of gas.
In order to achieve the above first purpose, the present invention adopts the following technical scheme: the two-stage gas compressor of double suction gas, packet
Include gas handling system, one stage of compression host, two-stage compression host, primary motor and secondary motor, the one of the discharge of one stage of compression host
Grade compressed gas, which enters in two-stage compression host, carries out second-compressed as two-stage compression gas；
One stage of compression host is driven by primary motor, and two-stage compression host is driven by secondary motor；
Gas handling system includes level-one gas handling system and secondary inlet system；
Level-one gas handling system is connect with one stage of compression host air inlet, secondary inlet system and two-stage compression host air inlet
Connection；
Level-one gas handling system and secondary inlet system can work independently.
In above-mentioned technical proposal, when the gas consumption of compressed gas pipe network is reduced, gas consumption is lower than the row of two-stage compression host
When tolerance, so that one stage of compression host is shut down and close level-one gas handling system；Open simultaneously secondary inlet system；Ambient atmos
It is directly entered in two-stage compression host and is compressed through second level progress system, the maximum capacity of the gas compressor is second level pressure
The capacity of contracting host keeps wasted work of the gas compressor in low capacity low and runs smoothly.
In the preferred embodiment of the present invention, secondary motor is variable-frequency motor or secondary motor by frequency converter control
Make its revolving speed.Thus when the gas compressor works, the operating frequency of secondary motor can be according to circumstances adjusted, to reduce energy
Consumption.
In the preferred embodiment of the present invention, level-one gas handling system includes connecting with one stage of compression host air inlet
Level-one pneumatic filter and level-one intake valve；Secondary inlet system includes the second level gas connecting with two-stage compression host air inlet
Body filter and secondary inlet valve.Gas into compression host is filtered through pneumatic filter, is improved and is entered the gas compressor
In gaseous mass, extend the service life of the gas compressor.
It in the preferred embodiment of the present invention, further include second level oil and gas separating system and second level oil cooling system；
The import of second level oil and gas separating system and the outlet of two-stage compression host connect；The two of the gas outlet discharge of second level oil and gas separating system
Grade compressed gas is delivered in compressed gas pipe network after pressure maintenance valve；Liquid outlet and the second level oil of second level oil and gas separating system
The import of cooling system connects, and outlet and the two-stage compression host and one stage of compression host of second level oil cooling system are all connected with, and is
Cooling；Secondary air cooling system is equipped between second level oil and gas separating system and compressed gas pipe network.
Two-stage compression host outlet discharge is second level gas mixture, and second level oil and gas separating system is for separating second level oil
Two-stage compression gas and cutting oil in gas mixture reduce the cutting oil being delivered in compressed gas pipe network, subtract
The loss of cutting oil, the cooling and lubricating oil mass of loss can control in 10ppm or less in few gas compressor.Second level oil
Cooling system is used for the cutting oil cooled and isolated, and cutting oil after cooling is back to two-stage compression host and level-one
It compresses in host, cools down for it.Two-stage compression gas is cooled down by secondary gas cooling system, to be lowered into compression
The temperature of the two-stage compression gas of gas pipeline network.
It in the preferred embodiment of the present invention, further include level-one oil gas separation cooling system and primary oil cooling system
System；The import of level-one oil gas separation cooling system and the outlet of one stage of compression host connect, and level-one oil gas separation cooling system goes out
Port is connected to the air inlet of two-stage compression host；The liquid outlet of level-one oil gas separation cooling system and level-one oil cooling system
Import connection, the outlet of level-one oil cooling system connect with one stage of compression host, cools down for it.
One stage of compression host outlet discharge is level-one gas mixture, and level-one oil gas separation cooling system is in separation level-one
Cool down for it while one stage of compression gas and cutting oil in gas mixture, makes to enter cold in two-stage compression host
But lubricating oil is greatly decreased, and improves the volumetric efficiency of two-stage compression.Level-one oil cooling system is for further cooling and isolating
Cutting oil, cutting oil after cooling is back in one stage of compression host, cools down for it.
In the preferred embodiment of the present invention, flow is equipped between second level oil cooling system and one stage of compression host
Regulating valve.Thus the flow that cutting oil in one stage of compression host is back in second level oil cooling system is adjusted.
Further include solenoid valve of releasing in another preferred embodiment of the invention, the air inlet for solenoid valve of releasing with
The gas outlet of second level oil and gas separating system is connected to, and the gas outlet for solenoid valve of releasing is connect with the air inlet of level-one intake valve.
In another preferred embodiment of the invention, level-one is equipped between one stage of compression host and two-stage compression host
Pressure sensor is equipped with secondary pressure sensor between two-stage compression host and compressed gas pipe network.First class pressure sensor is used
To monitor the gas pressure of one stage of compression host discharge, secondary pressure sensor is used to monitor the gas of two-stage compression host discharge
Pressure.
It further include controller, the first input end and level-one of controller in another preferred embodiment of the invention
The output end of pressure sensor is electrically connected；Second input terminal of controller is electrically connected with the output end of secondary pressure sensor；Control
First control terminal of device processed is electrically connected with the frequency converter of control secondary motor revolving speed, control secondary motor switching electricity and second level electricity
The revolving speed of machine；Second control terminal of controller is electrically connected with primary motor, control primary motor switching electricity；
Level-one intake valve by electric operator come and open, close or flow adjust, the third control terminal of controller
It is electrically connected with the electric operator of level-one intake valve, opening, closing and the flow for controlling level-one intake valve are adjusted；Secondary inlet
Valve also by electric operator come and open, close, the 4th control terminal of controller and the electronic execution machine of secondary inlet valve
Structure electrical connection controls the opening of secondary inlet valve, closes；5th control terminal of controller is electrically connected with solenoid valve of releasing, control
Release solenoid valve switching electricity.
After controller is set, the pressure value of controller reading first class pressure sensor and secondary pressure sensor, and according to
Above-mentioned pressure value determines the case where gas compressor work, to control primary motor, secondary motor, level-one intake valve, two
Grade intake valve and the working condition for discharging solenoid valve, to adjust the air inflow, capacity, one stage of compression gas of the gas compressor
Pressure and two-stage compression gas pressure.
To reach above-mentioned second purpose, the present invention adopts the following technical scheme: the two-stage gas compressor of double suction gas
Control method, the control method including start-up course and operational process；
The control method of start-up course are as follows: controller, which issues instruction, starts secondary motor first, after secondary motor starting, control
Device processed issues the instruction solenoid valve that makes to release and must be electrically turn off, at the same controller issue instructions to frequency converter make secondary motor with minimum
Frequency F1 operation, then controller issues instruction starting primary motor, and after primary motor starting, controller, which issues instruction, makes level-one
Intake valve is opened, then gradually rises secondary motor operating frequency F2, which is in stress state operation；
The control method of operational process are as follows: when the gas compressor is in stress state operation, when compressed gas pipe network is used
Tolerance is reduced when the pressure P2 of two-stage compressed air being made to be more than the maximum target pressure P2D of controller setting, and controller sending refers to
Reduce air inflow after enabling the air inlet bore for gradually reducing level-one intake valve, level-one intake valve air inlet bore reduce, air inflow subtracts
The pressure P1 of one stage of compression air is set to be less than setting value P1S after few, P1, which is less than P1S, makes controller issue instructions to frequency converter, becomes
Frequency device reduces the operating frequency F2 of secondary motor according to the instruction of controller, reduces the flow of two-stage compressed air, so that
Pressure P2 decline；
When compressed gas pipe network gas consumption is further reduced to the capacity of two-stage compression host, make secondary motor
Operating frequency F2 be reduced to low-limit frequency F1 after, controller issue instruction stall primary motor, later controller sending refer to
Order closes level-one intake valve, while controller issues instruction and opens secondary inlet valve, at this time the operating frequency of secondary motor
F2 is determined according to pressure P2；If P2 continues to increase, so that after the operating frequency F2 of secondary motor is reduced to low-limit frequency F1, control
Device processed, which issues instruction, makes solenoid valve power loss opening of releasing, and releases to two-stage compressed air, which is in zero load
State operation；
When the gas compressor is in idle running state, when compressed gas pipe network gas consumption increases so that two-stage compression is empty
When the pressure P2 of gas is lower than the minimum target pressure P2X of the setting of controller, it is electric that controller sending instructs the solenoid valve that makes to release to obtain
It closes, while controller issues instructions to frequency converter, frequency converter is stepped up the operating of secondary motor according to the instruction of controller
Frequency F2 is to maximum, to increase the capacity of the gas compressor；If pressure P2, still less than P2X, controller issues instruction starting
Primary motor, while controller issues to instruct and closes secondary inlet valve, after primary motor start completion, controller issues instruction and beats
Level-one intake valve is opened, which is in stress state operation.
In above-mentioned technical proposal, due to being adjusted to low-limit frequency F1 operation, such as 5Hz after secondary motor start completion, it
Rear stage motor just starts, so that starting current is small.In operational process, when the gas consumption reduction of compressed gas pipe network, gas consumption
Lower than two-stage compression host capacity when, so that one stage of compression host is shut down, the variable-frequency motor of two-stage compression host carries out
Converting operation, the maximum capacity of the gas compressor is the capacity of two-stage compression host at this time, and the gas compressor is made to exist
Wasted work when low capacity is low and runs smoothly.
Compared with prior art, beneficial effects of the present invention are as follows:
(1) when the gas consumption of compressed gas pipe network is reduced, and gas consumption is lower than the capacity of two-stage compression host, make level-one
Compression host shuts down, and the variable-frequency motor of two-stage compression host carries out converting operation, at this time the maximum row of the gas compressor
Tolerance is the capacity of two-stage compression host, keeps wasted work of the gas compressor in low capacity low and runs smoothly.
(2) two gas handling systems that can be worked independently are set, the range for adjusting the capacity of the gas compressor is wide.
(3) only secondary motor is variable-frequency motor, and primary motor is ordinary motor, and required frequency converter is small, at low cost.
(4) due to being adjusted to low-limit frequency operation, such as 5Hz after secondary motor start completion, primary motor is just opened later
It is dynamic, so that starting current is small.
(5) preliminary Oil-gas Separation is carried out through primary oil gas separation cooling system after one stage of compression is completed, by one stage of compression master
Most of cooling-lubricant of machine discharge separates discharge, and the cooling-lubricant entered in two-stage compression host is greatly decreased, mentions
The high volumetric efficiency of two-stage compression.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the flow diagram of the gas compressor of double suction gas of the invention.
Fig. 2 is the control flow schematic diagram of controller of the invention.
Appended drawing reference in Figure of description includes: one stage of compression host 11, two-stage compression host 12, primary motor 2,
One shaft coupling 21, secondary motor 3, frequency converter 31, second shaft coupling 32, level-one oil gas separation cooling system 4, primary oil cooling system
System 41, second level oil and gas separating system 5, second level oil cooling system 51, secondary gas cooling system 52, level-one pneumatic filter 61,
Secondary gas filter 62, level-one intake valve 71, secondary inlet valve 72, solenoid valve 73 of releasing, flow control valve 74, pressure maintain
Valve 75, controller 8, first class pressure sensor 81, secondary pressure sensor 82, pipeline 1, pipeline 2 92, pipeline 3 93, pipe
Road 4 94, pipeline 5 95, pipeline 6 96, compressed gas pipe network 10.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of embodiment is shown in the accompanying drawings, wherein identical from beginning to end
Or similar label indicates same or similar element or element with the same or similar functions.It is retouched below with reference to attached drawing
The embodiment stated is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " longitudinal direction ", " transverse direction ", " vertical ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.
In the description of the present invention, unless otherwise specified and limited, it should be noted that term " installation ", " connected ",
" connection " shall be understood in a broad sense, for example, it may be mechanical connection or electrical connection, the connection being also possible to inside two elements can
, can also indirectly connected through an intermediary, for the ordinary skill in the art to be to be connected directly, it can basis
Concrete condition understands the concrete meaning of above-mentioned term.
The present invention provides a kind of two-stage gas compressors of double suction gas, as shown in Figure 1, in a kind of preferred reality of the invention
It applies in mode comprising level-one gas handling system, secondary inlet system, one stage of compression host 11, two-stage compression host 12, driving one
Secondary motor 3, the level-one Oil-gas Separation that the primary motor 2 of 11 operating of grade compression host, driving two-stage compression host 12 operate are cold
But system 4, second level oil and gas separating system 5, level-one oil cooling system 41 and second level oil cooling system 51.
Compressing host includes an one stage of compression host 11 and a two-stage compression host 12, and compression host is screw
Compress host；One stage of compression host 11 is connect by first shaft coupling 21 with primary motor 2, and first shaft coupling 21 is ordinary elasticity
Shaft coupling.Two-stage compression host 12 is connect by second shaft coupling 32 with secondary motor 3, and second shaft coupling 32 is also ordinary elasticity
Shaft coupling, secondary motor 3 are variable-frequency motor or secondary motor 3 by its revolving speed of 31 controller of frequency converter, and secondary motor 3 drives second level
It compresses host 12 to operate, be delivered in compressed gas pipe network 10 after carrying out second-compressed to one stage of compression gas, for users to use.
The air inlet of one stage of compression host 11 is connect with level-one gas handling system, and level-one gas handling system includes the flowing from gas
The level-one pneumatic filter 61 and level-one intake valve 71 that direction is set gradually.The air inlet and secondary inlet of two-stage compression host 12
System connection, secondary inlet system includes the secondary gas filter 62 and secondary inlet set gradually from the flow direction of gas
Valve 72.Butterfly intake valve (such as the HPKG series of Hoerbiger of level-one intake valve 71 and the preferred closed type of secondary inlet valve 72
With the AIV series piston type intake valve of Nantong Red Star), for adjusting the air inlet of one stage of compression host 11 and two-stage compression host 12
Amount.
Level-one intake valve 71 and secondary inlet valve 72 can be opened by electric operator, be closed or flow tune
Section, according to circumstances the form of electric operator can be different, for example when without accurate control air inflow, can pass through solenoid valve
Switching electric control level-one intake valve 71 and secondary inlet valve 72 open or close；When for another example needing accurately to control air inflow, electricity
Dynamic executing agency is the proportion magnetic valve being made of solenoid valve, inverse proportion valve, cylinder and connecting rod, thus carries out level-one intake valve 71
It is adjusted with opening, closing or the flow of secondary inlet valve 72；Certainly level-one can also be carried out by the rotation angle of servo motor
The opening of intake valve 71 and secondary inlet valve 72, closing or flow are adjusted.The form of electric operator can be according to practical feelings
Condition is selected, and the present invention is not specifically limited.
The import of level-one oil gas separation cooling system 4 is connect by pipeline 1 with the outlet of one stage of compression host 11, should
Conveyed in pipeline 1 be cutting oil and one stage of compression gas mixture (abbreviation level-one gas mixture), primary oil
Gas separation cooling system 4 makes to enter second level pressure for separating most of cutting oil from level-one gas mixture
Oil content is low in one stage of compression gas in contracting host 12, improves the plot ratio of two-stage compression host 12；Level-one Oil-gas Separation is cold
But system 4 can also cool down level-one gas mixture, and level-one oil gas separation cooling system 4 can be used disclosed in CN206016907U
Inside set the horizontal cooling device of gs-oil separator.
The liquid outlet of level-one oil gas separation cooling system 4 is connect by pipeline 2 92 with level-one oil cooling system 41, level-one
Oil cooling system 41 is connect also by pipeline 2 92 with one stage of compression host 11, and conveying in the pipeline 2 92 is cooling and lubricating
On the one hand oil, the cutting oil are that one stage of compression host 11 cools down, on the other hand play lubricating action, reduce one stage of compression host
The abrasion of components in 11.The gas outlet of level-one oil gas separation cooling system 4 and the air inlet of two-stage compression host 12 pass through pipe
Road 3 93 is connected to, and conveying in the pipeline 3 93 is one stage of compression gas.
The import of second level oil and gas separating system 5 is connect by pipeline 4 94 with the outlet of two-stage compression host 12, the pipeline
Conveyed in 4 94 be cutting oil and two-stage compression gas mixture (abbreviation second level gas mixture).Second level oil gas point
From oily fine separator is equipped in system 5, two-stage compression gas is by the oily fine separator filtering in second level oil and gas separating system 5
Afterwards, the oil content of two-stage compression gas can be down to 10ppm or less.
The liquid outlet of 5 bottom of second level oil and gas separating system is connect also by pipeline 2 92 with second level oil cooling system 51, and two
Grade oil cooling system 51 is all connected with also by pipeline 2 92 and two-stage compression host 12 and one stage of compression host 11, cold for its conveying
But lubricating oil.It is connected with flow control valve 74 on the pipeline 2 92 that second level oil cooling system 51 is connect with one stage of compression host 11,
The cooling and lubricating oil stream amount of one stage of compression host 11 is arrived for adjusting second level oil cooling system 51.
The gas outlet of second level oil and gas separating system 5 is connected to by pipeline 5 95 with compressed gas pipe network 10, the pipeline 5 95
Middle conveying is two-stage compression gas.The pipeline 5 95 is equipped with pressure maintenance valve 75 and secondary gas cooling system 52, specifically
Such as the rear end shown in FIG. 1 that secondary gas cooling system 52 is located to pressure maintenance valve 75；Pressure maintenance valve 75 is for stablizing
Pressure in second level oil and gas separating system 5, when the pressure of two-stage compression gas is greater than the cracking pressure of pressure maintenance valve 75, two
Grade compressed gas could be flowed out from second level oil and gas separating system 5.
Pipeline six is also communicated on pipeline 5 95 between the gas outlet and pressure maintenance valve 75 of second level oil and gas separating system 5
96, the other end of pipeline 6 96 is connected to the air inlet of level-one intake valve 71；The pipeline 6 96 is in discharge conduit 5 95
Two-stage compression gas reduces the pressure of two-stage compression gas in pipeline 5 95, is connected with solenoid valve 73 of releasing on pipeline 6 96, is
2/2-way solenoid valve open in usual is released to the logical of 71 air inlet of level-one intake valve for being connected to or cutting off two-stage compression gas
Road.
In the present embodiment, first class pressure sensor 81 is equipped between one stage of compression host 11 and two-stage compression host 12,
Secondary pressure sensor 82 is equipped between two-stage compression host 12 and compressed gas pipe network 10.Such as shown in Figure 1, first class pressure
Sensor 81 is arranged between level-one oil gas separation cooling system 4 and two-stage compression host 12, and secondary pressure sensor 82 is arranged
Between secondary gas cooling system 52 and compressed gas pipe network 10.
In the present embodiment, controller 8 is additionally provided in the gas compressor, controller 8 can be the PLC of FX3U series.
As shown in connection with fig. 2, in controller 8 there is pressure threshold memory, the first comparison module and the second comparison module (not to show in figure
Out).One stage of compression gas in pipeline 3 93 is stored in pressure threshold memory sets pressure as first threshold P1S, pipeline five
The minimum target pressure of two-stage compression gas is second threshold P2X in 95, and the maximum target pressure of two-stage compression gas is third
Threshold value P2D.The first input end of first comparison module is electrically connected with the output end of first class pressure sensor 81, the first comparison module
Corresponding with the pressure threshold memory first threshold P1S output end connection of the second input terminal, the output end of the first comparison module
It is connect with the control terminal of controller 8.The first input end of second comparison module and the output end of secondary pressure sensor 82 are electrically connected
It connects, second, third input terminal of the second comparison module second threshold P2X corresponding with pressure threshold memory, third threshold respectively
The connection of value P2D output end, the output end of the second comparison module connect comparison module with the control terminal of controller 8.
First control terminal of controller 8 is electrically connected with the frequency converter 31 of control 3 revolving speed of secondary motor, controls secondary motor 3
The revolving speed of switching electricity and secondary motor 3；Second control terminal of controller 8 is electrically connected with primary motor 2, controls primary motor 2
Switching electricity；The third control terminal of controller 8 is electrically connected with the electric operator of level-one intake valve 71, controls level-one intake valve
71 opening, closing or flow is adjusted；4th control terminal of controller 8 and the electric operator of secondary inlet valve 72 are electrically connected
It connects, controls the opening of secondary inlet valve 72, closes；5th control terminal of controller 8 is electrically connected with solenoid valve 73 of releasing, and control is let out
The switching electricity of electric discharge magnet valve 73.
The operating process of the two-stage gas compressor of double suction gas of the invention is specific as follows: controller 8, which issues instruction, makes two
Grade motor 3 first starts, and controller 8, which issues, after secondary motor 3 starts instructs the solenoid valve 73 that makes to release that must be electrically turn off；Second level electricity simultaneously
Machine 3 drives two-stage compression host 12 to operate by second shaft coupling 32, after 3 start completion of secondary motor, adjusts it minimum
Frequency F1 operation, such as 5Hz.Controller 8, which issues instruction, later starts primary motor 2, and primary motor 2 passes through first shaft coupling
21 drive one stage of compression hosts 11 to operate, and controller 8 issues instruction and makes level-one intake valve 71 (two is grading after primary motor 2 starts
Air valve 72, which is in, closes shape) it opens, then 3 operating frequency F2 of secondary motor gradually rises, and efficient two-stage gas compressor is in
Stress state operation.
Due to the rotation of one stage of compression host 11, negative pressure is generated in the air inlet of one stage of compression host 11, the effect of negative pressure,
Enter ambient atmos in one stage of compression host 11 after level-one pneumatic filter 61 by level-one intake valve 71 to be compressed.One
The level-one gas mixture of discharge is delivered to the cooling of level-one Oil-gas Separation through pipeline 1 after the completion of 11 compression of grade compression host
In system 4.Level-one gas mixture is carried out preliminary Oil-gas Separation by level-one oil gas separation cooling system 4, isolates level-one pressure
Contracting gas and cutting oil；The cutting oil isolated is after the inflow level-one oil cooling system 41 of pipeline 2 92 carries out cooling
It flows into one stage of compression host 11；And the one stage of compression gas isolated is flowed into two-stage compression host 12 through pipeline 3 93 and is carried out
Second-compressed.
Second level gas mixture is delivered in second level oil and gas separating system 5 after completing through pipeline 4 94 and carries out by two-stage compression
Oil-gas Separation isolates two-stage compression gas and cutting oil；It is cold that the cutting oil a part isolated flows into second level oil
But system 51 flows into two-stage compression host 12 after carrying out cooling, and another part cutting oil is flowed by flow control valve 74
In one stage of compression host 11；And the two-stage compression gas isolated is flowed into secondary gas cooling system 52 through pressure maintenance valve 75
It is flowed into compressed gas pipe network 10 after middle cooling；Since two-stage compression gas is after the filtering of oily fine separator, two-stage compression gas
The oil content of body can be down to 10ppm or less.
During the gas compressor load operating, when 10 gas consumption of compressed gas pipe network is reduced, so that pipeline 5 95
When the pressure P2 of middle two-stage compression gas is more than the maximum target pressure P2D that the pressure threshold memory of controller 8 is set, control
Device 8 issues the air inlet bore that level-one intake valve 71 is gradually closed in instruction.The aperture reduction of level-one intake valve 71 reduces air inflow,
Air inflow reduces the flow of one stage of compression gas in pipeline 3 93 after reducing make its pressure P1 reduction, to make one stage of compression gas
Pressure P1 be maintained near setting value P1S, controller 8 issues instructions to frequency converter 31, and frequency converter 31 is according to the finger of controller 8
It enables and reduces output frequency；The output frequency of frequency converter 31, which reduces, makes the operating frequency F2 of secondary motor 3 is synchronous to reduce, and keeps second level electric
The revolving speed of machine 3 reduces, and the revolving speed of two-stage compression host 12 reduces with secondary motor 3 is synchronous, the second level being expelled in pipeline 5 95
The flow of compressed gas reduces, so that the pressure P2 of two-stage compression gas in pipeline 5 95 be made to reduce.3 revolving speed of secondary motor reduces
While, the flow into one stage of compression gas in two-stage compression host 12 reduces, so that one stage of compression gas in pipeline 3 93
Pressure P1 increase, be maintained at P1 near setting value P1S.
From the foregoing, it will be observed that adjusting the operating frequency F2 of secondary motor 3 according to the pressure P1 of one stage of compression gas, do not influence not only
The gas compressor can also make the pressure P1 of one stage of compression gas be maintained at setting value P1S attached pressure controlled response speed
Closely, the pressure oscillation for reducing one stage of compression gas stablizes the pressure ratio of two-stage compression, and efficiency improves.The operating frequency of secondary motor 3
Rate F2 can change, Real-time Feedback with the pressure P2 of two-stage compression gas indirectly, adjust in real time.
When 10 gas consumption of compressed gas pipe network is further reduced, and gas consumption is lower than the capacity of two-stage compression host 12,
After so that the operating frequency F2 of secondary motor 3 is reduced to low-limit frequency F1, controller 8, which issues instruction, stalls primary motor 2, later
The sending instruction of controller 8 closes level-one intake valve 71；Controller 8, which issues instruction, simultaneously opens secondary inlet valve 72, outside
Boundary's gas, which is directly entered in two-stage compression host 12, to be compressed, and the maximum capacity of the gas compressor is two-stage compression at this time
The capacity of host 12 keeps wasted work of the gas compressor in low capacity low and runs smoothly.
The operating frequency F2 of above situation, secondary motor 3 is determined according to the two-stage compression gas pressure P2 in pipeline 5 95.
Specifically, if P2 continues to increase, so that controller 8 issues after the operating frequency F2 of secondary motor 3 is reduced to low-limit frequency F1
Instruction makes 73 power loss of solenoid valve opening of releasing, and connection two-stage compression gas is released to the channel of 71 air inlet of level-one intake valve, right
Two-stage compression gas in pipeline 5 95 is released, and pressure is reduced, and the gas compressor is in light condition operation at this time.
Conversely, 10 gas consumption of compressed gas pipe network increases, so that pipeline when the gas compressor is when light condition is run
When the pressure P2 of two-stage compression gas is lower than the minimum target pressure P2X that the pressure threshold memory of controller 8 is set in 5 95,
Controller 8 controls solenoid valve 73 of releasing first and obtains electric and close, and cutting two-stage compression gas is released to going out for secondary inlet valve 72
The channel of port.Controller 8 issues instructions to frequency converter 31 simultaneously, and frequency converter 31 is stepped up according to the instruction of controller 8
The operating frequency F2 of secondary motor 3 is to maximum, to increase the capacity of the gas compressor.If being yet greater than pressure P2
When P2X, controller 8 issues instruction starting primary motor 2, while controller 8 issues instruction and closes secondary inlet valve 72；Level-one electricity
After 2 start completion of machine, controller 8 issues instruction and gradually opens level-one intake valve 71, and the gas compressor is in load shape at this time
State operation.
In the description of this specification, reference term " preferred embodiment ", " one embodiment ", " some implementations
The description of example ", " example ", specific examples or " some examples " etc. means specific spy described in conjunction with this embodiment or example
Sign, structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned
The schematic representation of term may not refer to the same embodiment or example.Moreover, the specific features of description, structure, material
Or feature can be combined in any suitable manner in any one or more of the embodiments or examples.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (10)
1. the two-stage gas compressor of double suction gas, including gas handling system, one stage of compression host, two-stage compression host, primary motor
And secondary motor, the one stage of compression gas of one stage of compression host discharge, which enters in two-stage compression host, carries out second-compressed as two
Grade compressed gas；It is characterized by:
The one stage of compression host is driven by primary motor, and the two-stage compression host is driven by secondary motor；
The gas handling system includes level-one gas handling system and secondary inlet system；
The level-one gas handling system is connect with one stage of compression host air inlet, the secondary inlet system and two-stage compression host into
Port connection；
The level-one gas handling system and secondary inlet system can work independently.
2. the two-stage gas compressor of double suction gas as described in claim 1, which is characterized in that the secondary motor is variable-frequency electric
Machine or the secondary motor are by its revolving speed of Frequency Converter Control.
3. the two-stage gas compressor of double suction gas as claimed in claim 2, which is characterized in that the level-one gas handling system includes
The level-one pneumatic filter and level-one intake valve being connect with one stage of compression host air inlet；The secondary inlet system includes and two
The secondary gas filter and secondary inlet valve of grade compression host air inlet connection.
4. the two-stage gas compressor of the double suction gas as described in one of claim 1-3, which is characterized in that further include second level oil gas
Separation system and second level oil cooling system；The import of the second level oil and gas separating system and two-stage compression host outlet connect
It connects；The two-stage compression gas of the gas outlet discharge of second level oil and gas separating system is delivered to compressed gas pipe network after pressure maintenance valve
In；The liquid outlet of the second level oil and gas separating system is connect with the import of the second level oil cooling system, second level oil cooling system
Outlet be all connected with two-stage compression host and one stage of compression host, cool down for it；The second level oil and gas separating system and compression
Secondary air cooling system is equipped between gas pipeline network.
5. the two-stage gas compressor of double suction gas as claimed in claim 3, which is characterized in that further include that level-one Oil-gas Separation is cold
But system and level-one oil cooling system；The import of the level-one oil gas separation cooling system and one stage of compression host outlet connect
It connects, the gas outlet of level-one oil gas separation cooling system is connected to the air inlet of two-stage compression host；The level-one Oil-gas Separation is cold
But the liquid outlet of system is connect with the import of the level-one oil cooling system, the outlet of level-one oil cooling system and one stage of compression master
Machine connection, cools down for it.
6. the two-stage gas compressor of double suction gas as claimed in claim 4, which is characterized in that the second level oil cooling system with
Flow control valve is equipped between one stage of compression host.
7. the two-stage gas compressor of double suction gas as claimed in claim 5, which is characterized in that it further include solenoid valve of releasing, institute
The air inlet for stating solenoid valve of releasing is connected to the gas outlet of the second level oil and gas separating system, the gas outlet for solenoid valve of releasing and institute
State the air inlet connection of level-one intake valve.
8. the two-stage gas compressor of double suction gas as claimed in claim 7, which is characterized in that the one stage of compression host and two
It is equipped with first class pressure sensor between grade compression host, second level pressure is equipped between the two-stage compression host and compressed gas pipe network
Force snesor.
9. the two-stage gas compressor of double suction gas as claimed in claim 8, which is characterized in that further include controller, controller
First input end be electrically connected with the output end of the first class pressure sensor；Second input terminal of controller and the second level pressure
The output end of force snesor is electrically connected；First control terminal of controller and the frequency converter of the control secondary motor revolving speed are electrically connected
It connects, the revolving speed of control secondary motor switching electricity and secondary motor；Second control terminal of controller is electrically connected with the primary motor
It connects, control primary motor switching electricity；
The level-one intake valve by electric operator come and open, close or flow adjust, the third control terminal of controller
It is electrically connected with the electric operator of level-one intake valve, opening, closing and the flow for controlling level-one intake valve are adjusted；The second level
Intake valve also by electric operator come and open, close, the 4th control terminal and the electronic of secondary inlet valve of controller are held
The electrical connection of row mechanism controls the opening of secondary inlet valve, closes；5th control terminal of controller is electrically connected with solenoid valve of releasing,
Control the switching electricity for solenoid valve of releasing.
10. a kind of control method of efficient two-stage air compressor as claimed in claim 9, which is characterized in that including starting
The control method of journey and operational process；
The control method of the start-up course are as follows: the controller, which issues instruction, starts secondary motor first, secondary motor starting
Afterwards, controller issues the instruction solenoid valve that makes to release and must be electrically turn off, while controller issues instructions to frequency converter makes secondary motor
With low-limit frequency F1 operation, then controller issues instruction starting primary motor, and after primary motor starting, controller issues instruction
Level-one intake valve is opened, then gradually rises secondary motor operating frequency F2, which is in stress state operation；
The control method of the operational process are as follows: when the gas compressor is in stress state operation, when compressed gas pipe network is used
Tolerance is reduced when the pressure P2 of two-stage compressed air being made to be more than the maximum target pressure P2D of controller setting, and controller sending refers to
Reduce air inflow after enabling the air inlet bore for gradually reducing level-one intake valve, level-one intake valve air inlet bore reduce, air inflow subtracts
The pressure P1 of one stage of compression air is set to be less than setting value P1S after few, P1, which is less than P1S, makes controller issue instructions to frequency converter, becomes
Frequency device reduces the operating frequency F2 of secondary motor according to the instruction of controller, reduces the flow of two-stage compressed air, so that
Pressure P2 decline；
When compressed gas pipe network gas consumption is further reduced to the capacity of two-stage compression host, make the fortune of secondary motor
Turn after frequency F2 is reduced to low-limit frequency F1, controller, which issues instruction, stalls primary motor, and controller issues instruction and makes later
Level-one intake valve is closed, while controller issues instruction and opens secondary inlet valve, at this time the operating frequency F2 root of secondary motor
It is determined according to pressure P2；If P2 continues to increase, so that after the operating frequency F2 of secondary motor is reduced to low-limit frequency F1, controller
Issuing instruction makes solenoid valve power loss opening of releasing, and releases to two-stage compressed air, which is in light condition
Operation；
When the gas compressor is in idle running state, when compressed gas pipe network gas consumption increases so that two-stage compressed air
When pressure P2 is lower than the minimum target pressure P2X of the setting of controller, controller, which issues, instructs the solenoid valve that makes to release that must be electrically turn off,
Controller issues instructions to frequency converter simultaneously, and frequency converter is stepped up the operating frequency F2 of secondary motor according to the instruction of controller
To maximum, to increase the capacity of the gas compressor；If pressure P2, still less than P2X, controller issues instruction starting level-one electricity
Machine, while controller issues to instruct and closes secondary inlet valve, after primary motor start completion, controller issues instruction unpack level-one
Intake valve, the gas compressor are in stress state operation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019102480557 | 2019-03-29 | ||
| CN201910248055.7A CN109812416A (en) | 2019-03-29 | 2019-03-29 | Efficient two-stage air compressor and its control method |
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| CN110118177A true CN110118177A (en) | 2019-08-13 |
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| CN201910248055.7A Withdrawn CN109812416A (en) | 2019-03-29 | 2019-03-29 | Efficient two-stage air compressor and its control method |
| CN201910543008.5A Pending CN110118177A (en) | 2019-03-29 | 2019-06-21 | The two-stage gas compressor and its control method of double suction gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594066A (en) * | 2020-11-18 | 2021-04-02 | 西北工业大学 | Waste gas supercharging and discharging device for underwater semi-closed type circulating power system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109812416A (en) * | 2019-03-29 | 2019-05-28 | 重庆奇螺流体设备有限公司 | Efficient two-stage air compressor and its control method |
| CN116066322B (en) * | 2023-04-06 | 2023-07-04 | 四川丹甫环境科技有限公司 | Compression structure and air compressor comprising same |
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| CN109812416A (en) | 2019-05-28 |
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