CN112431747B - A fully automatic diaphragm compressor oil circuit system and its starting method - Google Patents
A fully automatic diaphragm compressor oil circuit system and its starting method Download PDFInfo
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- CN112431747B CN112431747B CN202011320488.8A CN202011320488A CN112431747B CN 112431747 B CN112431747 B CN 112431747B CN 202011320488 A CN202011320488 A CN 202011320488A CN 112431747 B CN112431747 B CN 112431747B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000010725 compressor oil Substances 0.000 title claims abstract description 8
- 239000003921 oil Substances 0.000 claims abstract description 451
- 238000002347 injection Methods 0.000 claims abstract description 55
- 239000007924 injection Substances 0.000 claims abstract description 55
- 239000013589 supplement Substances 0.000 claims abstract description 17
- 238000007599 discharging Methods 0.000 claims abstract description 9
- 239000012528 membrane Substances 0.000 claims description 67
- 230000001502 supplementing effect Effects 0.000 claims description 22
- 239000010720 hydraulic oil Substances 0.000 claims description 17
- 230000001050 lubricating effect Effects 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 13
- 239000007789 gas Substances 0.000 description 11
- 238000007789 sealing Methods 0.000 description 3
- 230000009469 supplementation Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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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
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
- F04B45/053—Pumps having fluid drive
- F04B45/0533—Pumps having fluid drive the fluid being actuated directly by a piston
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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
- F04B39/02—Lubrication
- F04B39/0223—Lubrication characterised by the compressor type
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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
- F04B39/02—Lubrication
- F04B39/0284—Constructional details, e.g. reservoirs in the casing
-
- 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
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
- F04B45/053—Pumps having fluid drive
- F04B45/0536—Pumps having fluid drive the actuating fluid being controlled by one or more valves
-
- 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
-
- 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
- F04B49/10—Other safety measures
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention belongs to the technical field of diaphragm compressors, and particularly discloses a full-automatic diaphragm compressor oil way system and a starting method thereof. The oil way system of the diaphragm compressor is optimally designed, comprises an oil injection pipeline, an oil discharge pipeline, an oil supplement pipeline, an oil overflow pipeline and a bypass pipeline, and can realize oil injection before starting up and discharge all air in an oil cavity; an oil cavity bypass is started in a pre-operation stage, so that the impact current of the motor is reduced, and the stable starting is ensured; after the bypass is started, the bypass is closed, and the machine enters a normal running state; and completely discharging oil in the oil cavity when the machine is disassembled for maintenance. And all the functions are automatically controlled, so that the diaphragm compressor is simple and safe to operate and high in reliability.
Description
Technical Field
The application belongs to the technical field of diaphragm compressors, and particularly relates to a full-automatic diaphragm compressor oil way system and a starting method thereof.
Background
The diaphragm compressor is a positive displacement compressor, and is widely applied to the petrochemical field such as a hydrogen station and the like for compressing and conveying various high-purity gases, precious and rare gases, toxic and harmful gases and corrosive gases due to good sealing performance, wide pressure range and large compression ratio.
The diaphragm compressor consists of an oil circuit system and an air circuit system which are separated by a diaphragm, and an oil piston pushes hydraulic oil to drive the diaphragm to compress gas. In the working process, hydraulic oil inevitably leaks from the piston, so that the diaphragm compressor is generally provided with an oil supplementing pipeline for supplementing oil in the oil cavity, the oil supplementing quantity is difficult to be exactly the same as the oil spilling quantity, and the diaphragm compressor is generally provided with an oil spilling pipeline for spilling redundant oil and controlling the oil pressure. The oil cavity is provided with an oil supplementing pipeline and an oil spilling pipeline, and the oil cavity is the most basic oil way system of the diaphragm compressor. However, for a diaphragm compressor that is not operated for a long time, there is a large leakage of oil in the oil chamber and a large amount of air. The oil supplementing quantity is very small relative to the volume of the oil cavity, so that oil supplementing for the oil cavity by only the oil supplementing pipeline is very slow, and the starting process is overlong. On the other hand, air in the oil cavity can be smashed into micro-bubbles to be mixed into hydraulic oil in the starting stage, so that the normal operation of the diaphragm compressor is influenced, and the volumetric efficiency is reduced. For the reasons, the diaphragm compressor is additionally provided with an oil injection pipeline of an oil cavity, the methods of manufacturers are different, but the overall operation of the diaphragm compressor is complicated and needs to be provided with professional operators, and for the ultrahigh-pressure diaphragm compressor, the safety of the operators cannot be guaranteed on one hand by manually operating a machine, and the machine is easy to break down due to manual operation errors on the other hand.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a new oil path system for a fully automatic diaphragm compressor.
Disclosure of Invention
The invention aims to overcome the defect that an oil way of a diaphragm compressor cannot be controlled fully automatically, and provides an oil way system of a fully-automatic diaphragm compressor.
According to a first aspect of the present invention, there is provided a full-automatic diaphragm compressor oil circuit system, comprising: the oil pump comprises a membrane head oil cavity, a middle body, a crankshaft, a crankcase, a gear pump, an oil cooler, an oil filter, a lubricating path, an oil injection path, an oil supplementing path, a plunger pump, a first electromagnetic valve, a first one-way valve, a second electromagnetic valve, an oil discharge path, an oil overflow path, a bypass path, a pressure transmitter, a third electromagnetic valve, an oil overflow valve, a first oil flow meter and a second oil flow meter.
Wherein, the entry of gear pump and the oil bath intercommunication of crankcase, the gear pump is followed crankcase oil bath and is absorbed oil, and the oil that pumps passes through oil cooler and oil filter in proper order. The lubricating path, the oil injection path and the oil supplementing path are respectively connected with the outlet of the gear pump, and the gear pump supplies oil to the lubricating path, the oil injection path and the oil supplementing path. The other end of the lubricating circuit is connected with the crankshaft to supply oil for lubricating the crankshaft, and the lubricated oil flows into the crankcase oil pool; the other end of the oil injection way is connected with the bottom of the oil cavity of the membrane head, a first electromagnetic valve is arranged in the oil injection way to control the opening and closing of the oil injection way, and a first one-way valve is arranged close to the oil cavity to isolate high-pressure oil in the oil cavity from the oil injection way; the other end of the oil supplementing way is also connected with the bottom of the membrane head oil cavity, and the hydraulic oil is supplemented with oil for the membrane head oil cavity through a second one-way valve after being further pressurized by the plunger pump. The oil injection is to inject hydraulic oil into the oil cavity before the diaphragm compressor works, the pressure in the oil cavity is basically the same as the atmospheric pressure, the oil supplement is to supplement the hydraulic oil into the oil cavity in the working process of the compressor, the pressure in the oil cavity is higher, therefore, the pressurization of the gear pump can be met during the oil injection, the oil supplement still needs the additional pressurization of the plunger pump, the oil quantity in the two processes is different, the oil quantity in the oil injection process is large, the oil quantity in the oil supplement process is small, and therefore, if the oil injection is carried out by using an oil supplement way, the additional power consumption is realized, and the efficiency is low. And the oil supplementing path is used for injecting oil, so that air in the oil cavity cannot be completely discharged, the volumetric efficiency of the compressor is influenced, and the oil injection and the oil supplementation are separately controlled and independently operated, so that the energy-saving, efficient and stable operation of the diaphragm compressor is facilitated. One end of the oil discharge path is connected with an inlet of the gear pump, the other end of the oil discharge path is connected with the bottom of the oil cavity of the membrane head, a second electromagnetic valve is arranged in the oil discharge path to control the opening and closing of the oil discharge path, and a second oil flow meter is arranged in the direction, away from the oil cavity, of the second electromagnetic valve to monitor the oil discharge condition. The oil overflow path is connected with a bypass path in parallel, one end of the oil overflow path is connected with the top of the membrane head oil cavity, the other end of the oil overflow path is connected with the middle body, the oil overflow path is provided with an oil overflow valve for controlling the oil pressure of the membrane head oil cavity, the bypass path is provided with a third electromagnetic valve for controlling the opening and closing of the bypass path, a pressure transmitter is arranged in front of the third electromagnetic valve, and a first oil flow meter is arranged behind the third electromagnetic valve.
The oil injection way, the oil supplementing way and the oil discharging way are connected with the bottom of the membrane head oil cavity, and the oil overflow way and the bypass way are connected with the top of the membrane head oil cavity.
The further scheme is that the direction of the first one-way valve is the direction flowing to the membrane head oil cavity.
The further scheme is that the first electromagnetic valve can bear the oil pressure within the range of 1-2MPa, and the second electromagnetic valve and the third electromagnetic valve can bear the oil pressure within the range of 2-300 MPa.
The further scheme is that the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are all normally closed electromagnetic valves.
The further scheme is that the first oil flow meter is arranged in the direction of the third electromagnetic valve far away from the membrane head oil cavity, and the second oil flow meter is arranged in the direction of the second electromagnetic valve far away from the membrane head oil cavity.
In a further aspect, the gear pump is driven by a separate motor.
According to a second aspect of the present invention, there is provided a method for starting an oil path system of a full-automatic diaphragm compressor, the method being completed based on the following steps: whether oil is needed to be injected or not is judged according to actual conditions when the compressor is started. If the machine is just assembled or does not run for a long time, the membrane head oil cavity is not provided with enough oil and is stored with a large amount of air, and oil needs to be injected into the membrane head oil cavity at this time; if the engine is stopped and then started within a short time, only a small amount of oil in the oil cavity of the membrane head leaks, and direct starting without oil injection can be selected. When oil is injected into the membrane head oil cavity, the first electromagnetic valve and the third electromagnetic valve need to be opened, the second electromagnetic valve is closed, and the gear pump is started. The gear pump absorbs oil from the crankcase oil pool, the pumped oil is injected into the membrane head oil cavity through the cooler, the filter and the oil injection pipeline 9 in sequence, the oil injection pipeline is connected with the bottom of the membrane head oil cavity, the bypass is connected with the top of the membrane head oil cavity, and after the oil cavity is filled with the oil, the oil can flow into the middle body from the bypass 18 and then flows back to the crankcase oil pool. In the oil injection process, hydraulic oil forms a complete loop and is injected from the bottom of the oil cavity and flows out from the top, so that air in the oil cavity can be completely discharged, and the running efficiency of the compressor is improved. The indication number of the first oil flow meter on the bypass path can be used for judging the oil injection state, when the oil cavity is not filled with oil, no oil flows through the bypass path, the indication number of the first oil flow meter is 0, when the oil cavity is filled with oil, the oil can flow through the bypass path, the indication number of the first oil flow meter is more than 0, and then the oil injection is judged to be completed. And after oil injection is finished, the first electromagnetic valve and the second electromagnetic valve are closed, the oil injection path and the oil discharge path are disconnected, and the third electromagnetic valve is opened to enable the bypass path to be in a communicated state. Sufficient hydraulic oil is contained in the oil cavity of the membrane head at the preliminary stage of starting, if the bypass channel is not opened, which is equivalent to the loaded starting of the compressor, the starting current of the motor is very large, and the starting failure or even the damage to the motor can be caused in serious cases. In the starting pre-operation stage, the oil way bypass is opened, so that the oil pressure in the oil cavity of the membrane head is kept at normal pressure, the machine is in no-load operation, the starting impact current of the motor can be effectively reduced, the successful starting is ensured, and the motor and the membrane are also protected. After the pre-operation is finished, the third electromagnetic valve is closed after the motor reaches the normal rotating speed, the bypass path is disconnected, the oil spilling valve works, the diaphragm compressor starts to periodically replenish oil and spill oil and realize the compression of gas, and the machine enters a working state.
Furthermore, parts such as diaphragms and sealing rings of the diaphragm compressor belong to wearing parts and need to be replaced periodically, and the diaphragm heads need to be detached when the parts are replaced or maintained. The hydraulic oil in the membrane head oil cavity needs to be discharged before the membrane head is detached, the second electromagnetic valve and the third electromagnetic valve are opened during oil discharge, the oil discharge path and the bypass path are opened, the first electromagnetic valve is closed, the oil injection path is disconnected, the gear pump is started, the gear pump can pump oil from the membrane head oil cavity and the crankcase oil cavity, and the oil in the membrane head oil cavity can be pumped out quickly because the membrane head oil cavity is higher than the crankcase oil cavity. When oil is discharged, the bypass channel is opened to communicate the membrane head oil cavity with the middle body, gas enters the oil cavity to ensure that the oil can be completely discharged, and when the indication number of the second oil flow meter on the oil discharge channel is 0, the oil discharge is judged to be finished, and the gear pump is closed.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention can realize the full-automatic control of the diaphragm compressor oil way system, one-key starting and one-key oil discharging, and has the advantages of simplicity, safety and high reliability.
(2) The invention can realize the discharge of all gas in the oil cavity before starting, solve the problem of air bubbles in the diaphragm compressor oil and improve the efficiency of the diaphragm compressor.
(3) The invention can realize the no-load operation of the diaphragm compressor at the pre-operation stage, effectively reduce the problem of overlarge motor impact current when the diaphragm compressor is started and ensure the safety and stability of the system.
Drawings
The invention is illustrated and described only by way of example and not by way of limitation in the scope of the invention as set forth in the following drawings, in which:
FIG. 1 is a flow chart of an oil system;
FIG. 2 is a flow chart of oil injection for an oil system;
FIG. 3 is a flow chart of oil drainage of the oil system;
the oil pump comprises a membrane head oil cavity 1, a middle body 2, a crankshaft 3, a crankcase 4, a gear pump 5, an oil cooler 6, an oil filter 7, a lubrication circuit 8, an oil injection circuit 9, an oil supplement circuit 10, a plunger pump 11, a first electromagnetic valve 12, a first one-way valve 13, a second one-way valve 14, a second electromagnetic valve 15, an oil discharge circuit 16, an oil overflow circuit 17, a bypass circuit 18, a pressure transmitter 19, a third electromagnetic valve 20, an oil overflow valve 21, a first oil flow meter 22 and a second oil flow meter 23.
Detailed Description
In order to make the objects, technical solutions, design methods, and advantages of the present invention more apparent, the present invention will be further described in detail by specific embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Hereinafter, specific embodiments of the present application will be described in detail with reference to the accompanying drawings, and it will be apparent to those skilled in the art from this detailed description that the present application can be practiced. Features from different embodiments may be combined to yield new embodiments, or certain features may be substituted for certain embodiments to yield yet further preferred embodiments, without departing from the principles of the present application.
As shown in fig. 1, the oil circuit system of the present invention includes: the oil cooler comprises a membrane head oil cavity 1, a middle body 2, a crankshaft 3, a crankcase 4, a gear pump 5, an oil cooler 6, an oil filter 7, a lubricating path 8, an oil filling path 9, an oil supplementing path 10, a plunger pump 11, a first electromagnetic valve 12, a first check valve 13, a second check valve 14, a second electromagnetic valve 15, an oil discharging path 16, an oil spilling path 17, a bypass path 18, a pressure transmitter 19, a third electromagnetic valve 20, an oil spilling valve 21, a first oil flow meter 22 and a second oil flow meter 23.
The gear pump 5 is driven by an independent motor, the gear pump 5 can be independently started when a compressor motor is not started, an inlet of the gear pump 5 is communicated with an oil pool of the crankcase 4 to absorb oil from the oil pool of the crankcase 4, the pumped oil sequentially passes through the oil cooler 6 and the oil filter 7, the temperature of the oil in the membrane head oil cavity 1 is high, the hydraulic oil is cooled and then supplied into the membrane head oil cavity 1 to properly reduce the temperature in the membrane head oil cavity 1, and the oil filter 7 can filter impurities generated in the movement process of moving parts such as a piston and a crankshaft 3. The lubricating path 8, the oil injection path 9 and the oil supplement path 10 are respectively connected with the outlet of the gear pump 5, and the gear pump 5 supplies oil for the lubricating path 8, the oil injection path 9 and the oil supplement path 10. The other end of the lubricating path 8 is connected with the crankshaft 3, oil pumped out by the gear pump 5 is used for lubricating and supplying oil to the crankshaft 3 through the lubricating path 8, and the lubricated oil flows into an oil pool of the crankcase 4; the other end of the oil injection way 9 is connected with the bottom of the membrane head oil cavity 1, a first electromagnetic valve 12 is arranged in the oil injection way 9 to control the opening and closing of the oil injection way 9, a first one-way valve 13 is arranged at a position close to the membrane head oil cavity 1 to isolate high-pressure oil in the oil cavity from the oil injection way 9, so that the high-pressure oil cannot enter the oil injection way 9 when the compressor runs, and the first electromagnetic valve 12 can be a low-pressure electromagnetic valve (the bearable oil pressure range is 1-2MPa), so that the cost is saved; the other end of the oil supplementing way 10 is also connected with the bottom of the membrane head oil cavity 1, hydraulic oil is supplemented for the membrane head oil cavity 1 through a second one-way valve 14 after being further pressurized through a plunger pump 11, and the second one-way valve 14 is equivalent to an oil discharging valve of the plunger pump 11, so that high-pressure oil in the membrane head oil cavity 1 cannot flow backwards into the oil supplementing way 10. The oil injection is to inject hydraulic oil into an oil cavity before the diaphragm compressor works, the pressure in the oil cavity is basically the same as the atmospheric pressure, the oil supplement is to supplement the hydraulic oil into the diaphragm head oil cavity 1 in the working process of the compressor, the pressure in the diaphragm head oil cavity 1 is higher, therefore, the pressurization of the gear pump 5 during the oil injection can be met, the oil supplement still needs the additional pressurization of the plunger pump, the oil quantities in the two processes are different, the oil quantity in the oil injection process is large, the oil quantity in the oil supplement process is small, and therefore if the oil supplement is carried out by using an oil supplement way, the additional power consumption is realized, and the efficiency is low. And the oil supplementing path is used for injecting oil, so that air in the oil cavity cannot be completely discharged, the volumetric efficiency of the compressor is influenced, and the oil injection and the oil supplementation are separately controlled and independently operated, so that the energy-saving, efficient and stable operation of the diaphragm compressor is facilitated. One end of an oil discharge path 16 is connected with an inlet of the gear pump 5, the other end of the oil discharge path is connected with the bottom of the membrane head oil cavity 1, a second electromagnetic valve 15 is arranged in the oil discharge path to control the opening and closing of the oil discharge path 16, a second oil flow meter 23 is arranged behind the second electromagnetic valve 15 along the oil flowing direction, the oil discharge condition can be judged according to the reading of the flow meter, when the oil discharge path is opened for oil discharge, the reading of the second flow meter 23 is more than 0, and when the reading of the second flow meter is changed into 0, the oil discharge can be judged to be finished. The flowmeter is arranged behind the electromagnetic valve, so that high-pressure oil in the oil cavity of the diaphragm compressor can not reach the flowmeter during working, the flowmeter does not need to select a high-pressure-resistant flowmeter, and the cost is saved. The oil overflow path 17 is connected with the bypass path 18 in parallel, one end is connected with the top of the membrane head oil chamber 1, the other end is connected with the middle body 2, an oil overflow valve 21 is arranged on the oil overflow path 17 to control the oil pressure of the membrane head oil chamber 1, a third electromagnetic valve 20 is arranged on the bypass path to control the opening and closing of the bypass path 18, a first oil flow meter 22 is arranged in the direction of the third electromagnetic valve 20 far away from the oil chamber, the indication number of the first oil flow meter 22 can be used for judging the oil injection condition, the first oil flow meter 22 is arranged behind the third electromagnetic valve 20, high-pressure oil in the oil chamber can not reach the first oil flow meter 22 when the diaphragm compressor works, therefore, the first oil flow meter 22 does not need to select a high-pressure resistant flow meter, the cost is saved, and a pressure transmitter 19 is arranged in the direction of the third electromagnetic valve 20 close to the oil chamber.
The control logic of the oil circuit system designed by the invention is shown in fig. 2 and 3: the control cabinet is provided with a start key and an oil discharge key. When the compressor is started, the compressor can be started to enter a working state according to a set program by only pressing a start key and selecting whether to inject oil according to the actual situation. In the normal operation stage of the compressor, the pressure transmitter 19 also monitors the oil pressure, and alarms and stops when the oil pressure exceeds the limit. When the machine is disassembled and maintained and oil needs to be discharged, the compressor can discharge oil according to a set program only by pressing an oil discharge key.
Whether oil is needed to be injected or not is judged according to actual conditions when the compressor is started. If the machine is just assembled or does not run for a long time, the membrane head oil cavity 1 does not have enough oil and a large amount of air exists, and oil needs to be injected into the membrane head oil cavity 1; if the engine is stopped and then started within a short time, and only a small amount of oil in the membrane head oil chamber 1 leaks, the engine can be started directly without injecting oil. When oil is filled into the membrane head oil cavity 1, the first electromagnetic valve 12 and the third electromagnetic valve 20 need to be opened, the second electromagnetic valve 15 needs to be closed, and the gear pump 5 needs to be started. The gear pump 5 absorbs oil from the oil pool of the crankcase 4, the pumped oil sequentially passes through the oil cooler 6, the oil filter 7 and the oil injection pipeline 9 and is injected into the membrane head oil cavity 1, the oil injection pipeline 9 is connected with the bottom of the membrane head oil cavity 1, the bypass pipeline 18 is connected with the top of the membrane head oil cavity 1, and after the membrane head oil cavity 1 is filled with the oil, the oil can flow into the middle body from the bypass pipeline 18 and then flows back to the oil pool of the crankcase 4. In the oil injection process, hydraulic oil forms a complete loop and is injected from the bottom of the membrane head oil cavity 1 and flows out from the top, so that air in the oil cavity can be completely discharged, and the operation efficiency of the compressor is improved. The indication number of the oil flow meter 22 on the bypass passage 18 can be used to judge the oil filling state, when the oil chamber is not filled with oil, no oil flows through the bypass passage 18, the indication number of the oil flow meter 22 is 0, when the oil chamber is filled with oil, oil flows through the bypass passage 18, the indication number of the oil flow meter 22 is more than 0, and then the oil filling is judged to be completed. After oil injection is completed, the first electromagnetic valve 12 and the second electromagnetic valve 15 are closed, the oil injection path and the oil discharge path are disconnected, and the third electromagnetic valve 20 is opened to enable the bypass path to be in a communicated state. Sufficient hydraulic oil is contained in the oil cavity of the membrane head at the preliminary stage of starting, if the bypass channel is not opened, which is equivalent to the loaded starting of the compressor, the starting current of the motor is very large, and the starting failure or even the damage to the motor can be caused in serious cases. In the starting pre-operation stage, the oil way bypass is opened, so that the oil pressure in the membrane head oil cavity 1 is kept at normal pressure, the machine is in no-load operation, the starting impact current of the motor can be effectively reduced, the successful starting is ensured, and the motor and the membrane are also protected. After the pre-operation is finished, the third electromagnetic valve 20 is closed after the motor reaches the normal rotating speed, the bypass path is disconnected, the oil spilling valve works, the diaphragm compressor starts to periodically replenish oil and spill oil and realize the compression of gas, and the machine enters a working state.
Spare parts such as diaphragm compressor diaphragm, sealing washer belong to the wearing parts, need regularly change, need dismantle the membrane head when changing spare part or overhauing. The hydraulic oil in the membrane head oil cavity needs to be discharged before the membrane head is detached, the second electromagnetic valve 15 and the third electromagnetic valve 20 are opened during oil discharging, an oil discharging path and a bypass path are opened, the first electromagnetic valve 12 is closed, the oil injection path is disconnected, the gear pump 5 is started, the gear pump 5 can pump oil from the membrane head oil cavity and the oil pool of the crankcase 4, and the oil in the oil cavity can be pumped out quickly because the membrane head oil cavity is higher than the oil pool of the crankcase 4. When oil is discharged, the bypass path is opened to communicate the membrane head oil chamber with the middle body, gas enters the oil chamber to ensure that oil can be completely discharged, and when the indication number of the oil flow meter 23 on the oil discharge path is 0, the gear pump 5 is closed.
The invention can realize the full-automatic control of the oil circuit system of the diaphragm compressor, one-key starting and one-key oil discharging, is simple, safe and high in reliability, can realize the discharge of all gas in the oil cavity before starting, solves the problem of air bubbles in the oil of the diaphragm compressor, improves the efficiency of the diaphragm compressor, realizes the no-load operation of the diaphragm compressor in the pre-operation stage, effectively reduces the problem of overlarge motor impact current when the diaphragm compressor is started, and ensures the safety and stability of the system.
Although the present application has been described above with reference to specific embodiments, those skilled in the art will recognize that many changes may be made in the configuration and details of the present application within the principles and scope of the present application. The scope of protection of the application is determined by the appended claims, and all changes that come within the meaning and range of equivalency of the technical features are intended to be embraced therein.
It should be noted that, although the steps are described in a specific order, the steps are not necessarily performed in the specific order, and in fact, some of the steps may be performed concurrently or even in a changed order as long as the required functions are achieved.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (9)
1. The utility model provides a full-automatic diaphragm compressor oil piping system which characterized in that includes: the oil cooler comprises a membrane head oil cavity (1), a middle body (2), a crankshaft (3), a crankcase (4), a gear pump (5), an oil cooler (6), an oil filter (7), a lubricating path (8), an oil filling path (9), an oil supplementing path (10), a plunger pump (11), a first electromagnetic valve (12), a first one-way valve (13), a second one-way valve (14), a second electromagnetic valve (15), an oil discharging path (16), an oil spilling path (17), a by-way path (18), a pressure transmitter (19), a third electromagnetic valve (20), an oil spilling valve (21), a first oil flowmeter (22) and a second oil flowmeter (23);
an inlet of the gear pump (5) is communicated with an oil pool of the crankcase (4), an outlet of the gear pump is sequentially communicated with an oil cooler (6) and an oil filter (7), and the oil filter (7) is respectively connected with a lubricating path (8), an oil injection path (9) and an oil supplementing path (10);
the other end of the lubricating path (8) is connected with the crankshaft (3); the other end of the oil injection way (9) is connected with the membrane head oil cavity (1), a first electromagnetic valve (12) is arranged on the oil injection way (9), and a first one-way valve (13) is arranged at the position, close to the membrane head oil cavity (1), of the oil injection way (9); the other end of the oil supplementing way (10) is connected with the membrane head oil cavity (1), a plunger pump (11) is arranged on the oil supplementing way (10), a second one-way valve (14) is arranged at the position, close to the membrane head oil cavity (1), of the oil supplementing way (10), and hydraulic oil is supplemented for the membrane head oil cavity (1) through the second one-way valve (14) after being pressurized through the plunger pump (11);
one end of the oil discharge way (16) is connected with an inlet of the gear pump (5), the other end of the oil discharge way is connected with the membrane head oil cavity (1), and a second electromagnetic valve (15) and a second oil flow meter (23) are arranged on the oil discharge way (16);
the overflow path (17) is connected with the bypass path (18) in parallel, one end of the overflow path (17) is connected with the membrane head oil chamber (1), the other end of the overflow path is connected with the middle body (2), an overflow valve (21) is arranged on the overflow path (17), and a pressure transmitter (19), a third electromagnetic valve (20) and a first oil flow meter (22) are sequentially arranged on the bypass path (18).
2. The oil circuit system of the full-automatic diaphragm compressor as claimed in claim 1, wherein the oil injection circuit (9), the oil supplement circuit (10) and the oil discharge circuit (16) are connected with the bottom of the diaphragm head oil cavity (1), and the oil overflow circuit (17) and the bypass circuit (18) are connected with the top of the diaphragm head oil cavity (1).
3. The oil circuit system of the full-automatic diaphragm compressor, as recited in claim 2, characterized in that the direction of the first check valve (13) is the direction of flow to the die head oil chamber (1).
4. The oil circuit system of the full-automatic diaphragm compressor is characterized in that the first solenoid valve (12) can bear an oil pressure in a range of 1-2MPa, and the second solenoid valve (15) and the third solenoid valve (20) can bear an oil pressure in a range of 2-300 MPa.
5. The oil circuit system of the full-automatic diaphragm compressor is characterized in that the first solenoid valve (12), the second solenoid valve (15) and the third solenoid valve (20) are all normally closed solenoid valves.
6. The oil circuit system of the full-automatic diaphragm compressor, as recited in claim 5, characterized in that the first oil flow meter (22) is arranged in the direction of the third solenoid valve (20) away from the diaphragm head oil chamber (1), and the second oil flow meter (23) is arranged in the direction of the second solenoid valve (15) away from the diaphragm head oil chamber (1).
7. The oil circuit system of the full-automatic diaphragm compressor according to claim 6, wherein the gear pump (5) is driven by a separate motor.
8. A starting method of an oil way system of a full-automatic diaphragm compressor is characterized by being completed by the oil way system of the full-automatic diaphragm compressor according to any one of claims 1 to 7 based on the following steps:
s1, judging whether oil needs to be injected before starting the compressor; if oil injection is needed, the first electromagnetic valve (12) and the third electromagnetic valve (20) are opened, the second electromagnetic valve (15) is closed, the gear pump (5) is started, and if oil injection is not needed, the compressor is directly started;
s2, after oil injection is completed, closing the first electromagnetic valve (12) and the second electromagnetic valve (15), disconnecting the oil injection path and the oil discharge path, and opening the third electromagnetic valve (20) to enable the bypass path to be in a communicated state and enter pre-operation;
and S3, after the pre-operation is finished, after the motor reaches the normal rotating speed, closing the third electromagnetic valve (20), disconnecting the bypass path to enable the oil spilling valve to work, starting the diaphragm compressor to periodically supplement and spill oil and realize the compression of gas, and enabling the compressor to enter a working state.
9. The method for starting the oil circuit system of the full-automatic diaphragm compressor according to claim 8, wherein the step of starting the gear pump (5) in the step of S1 further comprises stopping oil injection when the indication of the first oil flow meter (22) is > 0.
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| CN113107821B (en) * | 2021-04-01 | 2022-07-12 | 西安交通大学 | A fully automatic start-stop control system for diaphragm compressors |
| CN113464402B (en) * | 2021-07-14 | 2022-11-04 | 上海氢枫能源技术有限公司 | Oil pressure limiting system of hydrogen diaphragm compressor and control method thereof |
| CN116557276A (en) * | 2022-01-28 | 2023-08-08 | 国家能源投资集团有限责任公司 | Oil way system of diaphragm compressor and oil supplementing method thereof |
| CN114837922B (en) * | 2022-03-23 | 2024-08-30 | 宜兴氢枫能源技术有限公司 | Automatic bubbling system of diaphragm compressor |
| CN115898824A (en) * | 2022-10-31 | 2023-04-04 | 中石化石油机械股份有限公司研究院 | Oil supplementing system and oil supplementing method for diaphragm compressor |
| CN116146467A (en) * | 2023-02-23 | 2023-05-23 | 烟台东德氢能技术有限公司 | Method for starting diaphragm compressor at low temperature and quickly preheating and circulating |
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| CN116677593B (en) * | 2023-08-03 | 2023-11-28 | 江苏恒久机械股份有限公司 | Control system and method for starting diaphragm type compressor |
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