CN109854571B - Parallel hydraulic mechanism oil supply system and method - Google Patents
Parallel hydraulic mechanism oil supply system and method Download PDFInfo
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- CN109854571B CN109854571B CN201910283009.0A CN201910283009A CN109854571B CN 109854571 B CN109854571 B CN 109854571B CN 201910283009 A CN201910283009 A CN 201910283009A CN 109854571 B CN109854571 B CN 109854571B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title abstract description 6
- 239000003921 oil Substances 0.000 claims abstract description 234
- 238000007872 degassing Methods 0.000 claims abstract description 42
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 238000009849 vacuum degassing Methods 0.000 claims description 47
- 238000000605 extraction Methods 0.000 claims description 4
- 239000010705 motor oil Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 3
- 239000010721 machine oil Substances 0.000 claims 7
- 230000005611 electricity Effects 0.000 claims 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 18
- 230000002411 adverse Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
The invention discloses an oil supply system and method for a parallel hydraulic mechanism, comprising the following steps: the hydraulic oil pump comprises an oil tank, a high-pressure pump, a hydraulic mechanism and an oil pipe, wherein the high-pressure pump sucks hydraulic oil from the oil tank and pumps the hydraulic oil out, the hydraulic oil is returned to the oil tank through the oil pipe after being used by the hydraulic mechanism, the oil pipe flowing from the oil tank to the high-pressure pump is divided into two branch pipes connected in parallel, the first branch pipe is directly connected with an oil inlet of the high-pressure pump, and a first valve is arranged on the first branch pipe; the second branch pipe is connected with an oil inlet of the high-pressure pump through an oil liquid degassing device, and second valves are arranged on oil pipes at two ends of the oil liquid degassing device; the system can be used for supplying oil after deaeration or directly supplying oil according to the requirement, so that deaeration and oil supply efficiency are considered.
Description
Technical Field
The invention relates to an oil supply system and method for a parallel hydraulic mechanism, and belongs to the technical field of oil supply of hydraulic mechanisms.
Background
The hydraulic oil serving as a common working medium of the hydraulic system not only transmits power, but also plays roles in lubricating and cooling the hydraulic system and other devices, but the gas in the hydraulic oil has a great adverse effect on the stable operation of the mechanism. Because, for high-power hydraulic actuators, the pressure changes across the hydraulic system, in particular the dynamic pressure changes of the buffer chambers, cannot be analyzed without regard to the compressibility and elastic deformation of the hydraulic oil. The dynamic change of load and acting force caused by the elastic deformation of the hydraulic system can not only influence the mechanical characteristics of the circuit breaker, but also influence the reliability of the operating mechanism. Therefore, it is necessary to control the air content (including free and dissolved air in the hydraulic oil) in the hydraulic system to improve the stability of the operation of the hydraulic mechanism and the reliability of the operation.
If gas is mixed in an oil circulation system of the hydraulic mechanism, the pressure in the system is unstable, and when the gas exists in the oil, the elastic modulus of the oil is greatly reduced, so that the response of the system is slow, and the rigidity and the corresponding characteristics of the system are affected. When a large amount of free gas exists in the oil, local high temperature is generated when the gas is compressed sharply, and carbonization of the oil is caused. When the oil liquid in the system is subjected to severe pressure change due to overhigh local flow velocity, and the oil liquid enters low pressure from high pressure, gas in the hydraulic oil can be separated, and bubbles can be instantaneously expanded and broken, so that local high-pressure impact is generated at the moment, and cavitation is caused on the surface of a hydraulic element. The increase of the air content can inevitably generate oxidation corrosion on the oil, increase the acid value of the oil and shorten the service life of the oil.
At present, the research on the degassing of hydraulic oil at home and abroad mainly focuses on the dissolution mechanism of the gas, the generation principle of the gas and the chromatographic analysis of various gases. And in terms of removing gases from the oil, there are also associated mechanical devices to support. However, these are all conventional general mechanical devices, and a professional system device capable of physically degassing oil is not designed in physical principle. In addition, when the degassing system is installed in the hydraulic mechanism, consideration is required to be given to how the power of the original system is not adversely affected.
Disclosure of Invention
The invention aims to solve the technical problems that: the parallel hydraulic mechanism oil supply system can be used for simply and quickly deaerating hydraulic oil by utilizing a physical principle, and can be used for supplying oil after deaerating oil or directly supplying oil according to requirements so as to consider deaeration and oil supply efficiency.
The technical scheme of the invention is as follows: a parallel hydraulic mechanism oil supply system, comprising: the hydraulic oil pump comprises an oil tank, a high-pressure pump, a hydraulic mechanism and an oil pipe, wherein the high-pressure pump sucks hydraulic oil from the oil tank and pumps the hydraulic oil out, the hydraulic oil is returned to the oil tank through the oil pipe after being used by the hydraulic mechanism, the oil pipe flowing from the oil tank to the high-pressure pump is divided into two branch pipes connected in parallel, the first branch pipe is directly connected with an oil inlet of the high-pressure pump, and a first valve is arranged on the first branch pipe; the second branch pipe is connected with an oil inlet of the high-pressure pump through an oil liquid degassing device, and second valves are arranged on oil pipes at two ends of the oil liquid degassing device; the oil deaerator comprises:
the vacuum degassing bin is characterized in that a space in the vacuum degassing bin is divided into a vibration cavity and a degassing cavity by a baffle plate, the vibration cavity is communicated with the upper space of the degassing cavity, one side of the vibration cavity is provided with an oil inlet, and one side of the degassing cavity is provided with an oil outlet;
the vibrator is arranged in the vibration cavity and is used for vibrating and stirring the entering oil;
the guide plate is arranged in the degassing cavity and is used for receiving the oil overflowed from the vibration cavity and guiding the oil from the upper part of the degassing cavity to the bottom;
the vacuum pump is connected with the vacuum degassing bin and is suitable for extracting air and enabling the space in the vacuum degassing bin to form preset negative pressure when oil flows on the guide plate;
an oil inlet on the vacuum degassing bin is connected with an oil tank through an oil pipe, and an oil outlet on the vacuum degassing bin is connected with a high-pressure pump through an oil pipe.
Preferably, a normal pressure temporary storage bin with a closed cavity is arranged between the oil outlet of the vacuum degassing bin and the high-pressure pump, an oil inlet of the normal pressure temporary storage bin is communicated with the oil outlet of the vacuum degassing bin through an oil pipe, and the oil outlet of the normal pressure temporary storage bin is connected with the high-pressure pump through the oil pipe.
Preferably, the normal pressure temporary storage bin comprises an oil storage cavity and a movable normal pressure piston which is arranged in the oil storage cavity in a matching way, and the air pressure in the oil storage cavity is regulated by changing the moving position of the normal pressure movement in the oil storage cavity.
Preferably, the normal pressure temporary storage bin further comprises a driving device for driving the normal pressure piston to move; an air pressure sensor is arranged in the oil storage cavity and used for detecting the air pressure in the oil storage cavity, and a signal output end of the air pressure sensor is electrically connected with a signal input end of the controller; the air pressure sensor transmits the detected air pressure value to the controller, and the driving device drives the normal pressure movement to move in the oil storage cavity according to the command of the controller so as to adjust the air pressure in the oil storage cavity.
Preferably, the guide plates are arranged in a plurality, staggered in sequence and arranged on the inner wall at one side of the baffle plate and the degassing cavity, and oil flows through the guide plates in sequence and enters the bottom of the degassing cavity.
Preferably, the guide plates are respectively arranged in a downward inclined mode, and two adjacent guide plates are in no contact.
Preferably, the extraction opening of the vacuum pump is arranged at the upper position of the vacuum degassing bin, a liquid level sensor is arranged in the vacuum degassing bin, the signal output end of the liquid level sensor is electrically connected with the signal input end of the controller, the signal output end of the controller is electrically connected with the control end of the vacuum pump, the liquid level value in the vacuum degassing bin is transmitted to the controller by the liquid level sensor, and the vacuum pump decides to start or close the extraction according to the command of the controller.
Preferably, a flow sensor is arranged on the oil outlet pipe of the normal pressure temporary storage bin, and the flow sensor is used for detecting the flow of hydraulic oil flowing out of the normal pressure temporary storage bin; the first valve and the second valve are electric valves, the signal output end of the flow sensor is electrically connected with the signal input end of the controller, the signal output end of the controller is electrically connected with the control ends of the first valve and the second valve, and the first valve and the second valve are respectively opened or closed according to the command of the controller.
Preferably, a second valve is arranged on the oil pipe between the vacuum degassing bin and the normal pressure temporary storage bin, the second valve is an electric valve, the control end of the valve is also electrically connected with the signal output end of the controller, and the controller controls the valve to be opened or closed.
Preferably, the first branch pipe and the second branch pipe are connected together to the oil tank through an oil filter.
The beneficial effects of the invention are as follows: by designing the first branch for direct oil supply and the second branch for deaerated oil supply in the hydraulic oil supply loop, whether the oil is deaerated for oil supply or not can be selected according to the requirement, or the direct oil supply is selected, so that the deaeration and the oil supply efficiency are considered.
In addition, the oil liquid degassing device in the system combines the vacuum degassing bin, the vacuum pump, the vibrator and the guide plate and is arranged in a circulation loop of hydraulic oil, oil liquid enters the vibration cavity to be vibrated and stirred by the vibrator after coming out of the oil tank, negative pressure is formed locally, and gas molecules in the oil liquid are promoted to be converted into small bubbles; then overflows and enters the degassing cavity, oil flows on a plurality of guide plates, the contact area between the liquid level and the environment is increased, bubbles in the oil are pumped out by the vacuum pump, so that the degassing function is realized, the degassed oil enters the high-pressure pump, is pumped to the hydraulic mechanism for use, and returns to the oil tank through the oil pipe. And the normal pressure temporary storage bin in the oil liquid deaerating device can adjust the oil pressure in the vacuum deaerating bin to a normal level so as to realize the normal operation of the hydraulic mechanism without adjusting the power parameters of the high-pressure pump. Compared with the prior art, the oil liquid degassing device has the characteristics of simple structure, convenient operation, strong practicability and the like, and can effectively remove gas in oil liquid.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a control block diagram of the present invention;
reference numerals illustrate: the device comprises a fuel tank 1, a fuel filter 2, a first branch pipe 3, a second branch pipe 4, a vacuum degassing bin 5, a vibration cavity 6, a degassing cavity 7, a vibrator 8, a baffle 9, a guide plate 10, a vacuum pump 11, a second valve 12, a first valve 13, a liquid level sensor 14, an oil storage cavity 15, a normal pressure piston 16, a driving device 17, an air pressure sensor 18, a flow sensor 19 and a high-pressure pump 20.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific examples:
referring to fig. 1, a parallel hydraulic mechanism oil supply system according to the present invention includes: the hydraulic oil pump comprises an oil tank 1, a high-pressure pump 20, a hydraulic mechanism, an oil pipe, an engine oil filter 2 and a hydraulic oil degassing system, wherein the high-pressure pump 20 sucks hydraulic oil from the oil tank 1 and pumps the hydraulic oil out, the hydraulic oil returns to the oil tank 1 through the oil pipe after being used by the hydraulic mechanism, the oil pipe flowing from the oil tank 1 to the high-pressure pump 20 through the engine oil filter 2 is divided into two branch pipes which are connected in parallel, the first branch pipe 3 is directly connected with an oil inlet of the high-pressure pump 20, and a first valve 13 is arranged on the first branch pipe 3; the second branch pipe 4 is connected with an oil inlet of the high-pressure pump 20 through an oil deaerator, and second valves 12 are arranged on oil pipes at two ends of the oil deaerator; when the first valve 13 is opened and the second valve 12 is closed, oil enters the high-pressure pump 20 from the first branch pipe 3, and the oil tank 1 is directly supplied with oil; when the first valve 13 is closed and the second valve 12 is opened, the oil enters the high-pressure pump 20 from the second branch pipe 4, and at this time, the oil in the oil tank 1 is deaerated by the oil deaerator before entering the high-pressure pump 20.
The advantage of adopting above structure lies in: when the oil deaerator has problems and can not supply oil in time or the pressure of a mixed gas system in the hydraulic oil is stable, the oil can be directly supplied through the oil tank 1, normal work is not affected, and meanwhile, the oil supply efficiency can be improved. When the pressure of the mixed gas system in the hydraulic oil is unstable, the gas in the hydraulic oil can be removed through the oil liquid deaerator, so that the pressure of the system is restored and stabilized.
The oil deaerator comprises: vacuum degassing bin 5, electromagnetic shaker 8, guide plate 10 and vacuum pump 11, wherein:
the vacuum degassing bin 5, the space in the vacuum degassing bin is divided into a vibration cavity 6 and a degassing cavity 7 by a baffle plate 9, the vibration cavity 6 is communicated with the upper space of the degassing cavity 7, an oil inlet is arranged on one side of the vibration cavity 6, and an oil outlet is arranged on one side of the degassing cavity 7. Specifically, the baffle 9 divides the lower space in the vacuum degassing bin 5 into two non-circulating cavities, namely a vibration cavity 6 and a degassing cavity 7, and the upper spaces of the vibration cavity 6 and the degassing cavity 7 are communicated, for example, a gap is reserved between the upper end of the baffle 9 and the inner top of the vacuum degassing bin 5, or a through hole is formed in the upper part of the baffle 9, so that oil in the vibration cavity 6 can flow into the degassing cavity 7. The location of the oil inlet may be arranged, for example, on the side wall of the vibration cavity 6, preferably in an upper position, and the location of the oil outlet may be arranged, for example, on the side wall and the bottom surface of the degassing cavity 7, preferably in a position of the side wall near the bottom.
Vibrator 8 sets up in vibrations cavity 6 for stir the fluid that gets into vibrations, the local negative pressure that can form in vibrations in-process promotes the gas molecule in the fluid to the conversion of tiny bubble. Specifically, the vibrator 8 is preferably a high-frequency vibrator 8, such as a high-frequency vibration rod, which is vertically installed in the vibration cavity 6, for example, with its base installed on the inner top of the vibration cavity 6, and with the end of the vibration rod being spaced from the bottom surface of the vibration cavity 6. Of course, the vibrator 8 may be installed in other manners as long as the oil can be vibrated and stirred.
The deflector 10 is arranged in the degassing cavity 7, and is used for receiving the oil overflowed from the vibration cavity 6, guiding the oil from the upper part of the degassing cavity 7 to the bottom, and discharging the oil from the oil outlet. Specifically, the number of the guide plates 10 is several, and the guide plates 10 are sequentially staggered on the baffle plate 9 and the inner wall at one side of the opposite degassing cavity 7, preferably, the guide plates 10 are respectively arranged in a downward inclined manner, no contact exists between two adjacent guide plates 10, oil flows through the guide plates 10 in sequence and enters the bottom of the degassing cavity 7, and in the process, the contact area between the liquid level and the environment is increased due to the fact that the oil flows on the guide plates 10, so that degassing can be performed.
And the vacuum pump 11 is connected with the vacuum degassing bin 5 and is suitable for sucking air and forming a preset negative pressure in the space in the vacuum degassing bin 5 when the oil flows on the guide plate 10, namely sucking gas emitted by the flowing of the oil on the guide plate 10. Specifically, the suction opening of the vacuum pump 11 is disposed at an upper position of the vacuum degassing bin 5 to avoid that oil enters the vacuum pump 11 to affect the operation thereof. Preferably, the pressure in the vacuum degassing chamber 5 is between-0.1 and 0.01 MPa.
An oil inlet on the vacuum degassing bin 5 is connected with the oil tank 1 through an oil pipe, an oil outlet on the vacuum degassing bin 5 is connected with the high-pressure pump 20 through an oil pipe, and an engine oil filter 2 is arranged on the oil pipe between the oil tank 1 and the vacuum degassing bin 5.
The working principle of the oil liquid deaerator is as follows: after the high-pressure pump 20 starts to work, oil enters the vibration cavity 6 from the oil tank 1, is vibrated and stirred by the vibrator 8, and forms negative pressure locally to promote gas molecules in the oil to be converted into small bubbles; then overflows and enters the degassing cavity 7, oil flows on the guide plates 10 to increase the contact area between the liquid level and the environment, bubbles in the oil are pumped out by the vacuum pump 11, so that the degassing function is realized, the degassed oil enters the high-pressure pump 20, is pumped to the hydraulic mechanism for use, and returns to the oil tank 1 through the oil pipe.
Since the vacuum degassing chamber 5 has a negative pressure during degassing, the pumping power of the high-pressure pump 20 may not be required if the high-pressure pump is operated according to the parameters originally set by the hydraulic mechanism, i.e., the oil is sucked out from the vacuum degassing chamber 5 to consume part of the oil pressure. Therefore, a normal pressure temporary storage bin with a closed cavity is arranged between the oil outlet of the vacuum degassing bin 5 and the high-pressure pump 20, the oil inlet of the normal pressure temporary storage bin is communicated with the oil outlet of the vacuum degassing bin 5 through an oil pipe, the oil outlet of the normal pressure temporary storage bin is connected with the high-pressure pump 20 through an oil pipe, and the normal pressure temporary storage bin mainly regulates the oil pressure in the vacuum degassing bin 5 to a normal level so as to realize normal operation of a hydraulic mechanism without regulating the power parameters of the high-pressure pump 20.
Specifically, the normal pressure temporary storage bin comprises an oil storage cavity 15 and a movable normal pressure piston 16 which is arranged in the oil storage cavity 15 in a matched mode, wherein the normal pressure piston 16 is sleeved in the oil storage cavity 15, and the air pressure in the oil storage cavity 15 is regulated by changing the moving position of normal pressure movement in the oil storage cavity 15. Preferably, the normal pressure temporary storage bin further comprises a driving device 17 for driving the normal pressure piston 16 to move, for example, an electric push rod, wherein the extending and contracting direction of the electric push rod is the same as the moving direction of the normal pressure piston 16, and of course, other driving devices 17 with other structural forms can be adopted, so long as the normal pressure piston 16 can be driven to extend and contract.
Preferably, referring to fig. 2, in order to realize automatic control of the normal pressure temporary storage bin, an air pressure sensor 18 is arranged in the oil storage cavity 15 and is used for detecting air pressure in the oil storage cavity 15, and a signal output end of the air pressure sensor 18 is electrically connected with a signal input end of the controller; the air pressure sensor 18 transmits the detected air pressure value to the controller, and the driving device 17 drives the normal pressure movement to move in the oil storage cavity 15 according to the command of the controller so as to adjust the air pressure in the oil storage cavity 15. For example, the oil pressure range value of the oil storage chamber 15 is preset, and when the detected air pressure value is greater than the set range value, the driving device 17 drives the normal pressure movement to move in a direction of increasing the space of the oil storage chamber 15, i.e., to move outwards, so as to adjust the oil pressure to the normal range. When the detected air pressure value is smaller than the set range value, the driving device 17 drives the normal pressure movement to move toward the direction of reducing the space of the oil storage cavity 15, i.e., move inwards, so as to adjust the oil pressure to the normal range.
In addition, a flow sensor 19 is arranged on the oil outlet pipe of the normal pressure temporary storage bin, and the flow sensor 19 is used for detecting the flow of hydraulic oil flowing out of the normal pressure temporary storage bin; the first valve 13 and the second valve 12 are electric valves, the signal output end of the flow sensor 19 is electrically connected with the signal input end of the controller, the signal output end of the controller is electrically connected with the control ends of the first valve 13 and the second valve 12, and the first valve 13 and the second valve 12 are respectively opened or closed according to the command of the controller. When the high-pressure pump 20 starts to work, whether hydraulic oil flows out of the normal pressure temporary storage bin or not can be monitored through the flow sensor 19, when the hydraulic oil flows out, the controller controls the first valve 13 to be closed, the second valve 12 to be opened, and at the moment, the oil in the oil tank 1 is deaerated by the oil deaerator and then enters the high-pressure pump 20; when no hydraulic oil flows out, the controller controls the first valve 13 to be opened, the second valve 12 to be closed, and oil enters the high-pressure pump 20 from the first branch pipe 3, and the oil tank 1 directly supplies oil at the moment, so that oil is ensured to enter the high-pressure pump 20.
When the oil is in a higher position, it may enter the vacuum pump 11, thereby affecting the proper operation of the vacuum pump 11. For this purpose, a liquid level sensor 14 is installed in the vacuum degassing bin 5 to monitor the height of the oil, a signal output end of the liquid level sensor 14 is electrically connected with a signal input end of a controller, a signal output end of the controller is electrically connected with a control end of the vacuum pump 11, the liquid level sensor 14 transmits a liquid level value in the vacuum degassing bin 5 to the controller, and when the liquid level value exceeds a predetermined value, that is, when the liquid level value possibly enters the vacuum pump 11, the controller controls the vacuum pump 11 to stop pumping. Meanwhile, a second valve 12 is also arranged on the oil pipe between the vacuum degassing bin 5 and the normal pressure temporary storage bin, the second valve 12 is an electric valve, the control end of the valve is also electrically connected with the signal output end of the controller, the controller controls the valve to be opened or closed, when the vacuum pump 11 is closed, the valve can be closed, so that the oil in the vacuum degassing bin 5 cannot flow into the normal pressure temporary storage bin, and meanwhile, the oil in the normal pressure temporary storage bin can be prevented from flowing back into the vacuum degassing bin 5.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (8)
1. A parallel hydraulic mechanism oil supply system, comprising: the hydraulic oil pump comprises an oil tank (1), a high-pressure pump (20), a hydraulic mechanism and an oil pipe, wherein the high-pressure pump (20) sucks hydraulic oil from the oil tank (1) and pumps the hydraulic oil out, and the hydraulic oil returns to the oil tank (1) through the oil pipe after being used by the hydraulic mechanism, and is characterized in that: the oil pipe flowing from the oil tank (1) to the high-pressure pump (20) is divided into two branch pipes connected in parallel, wherein the first branch pipe (3) is directly connected with an oil inlet of the high-pressure pump (20), and a first valve (13) is arranged on the first branch pipe (3); the second branch pipe (4) is connected with an oil inlet of the high-pressure pump (20) through an oil deaerator, and second valves (12) are arranged on oil pipes at two ends of the oil deaerator; the oil deaerator comprises:
the vacuum degassing bin (5), the space in the vacuum degassing bin (5) is divided into a vibration cavity (6) and a degassing cavity (7) by a baffle (9), the vibration cavity (6) is communicated with the upper space of the degassing cavity (7), one side of the vibration cavity (6) is provided with an oil inlet, and one side of the degassing cavity (7) is provided with an oil outlet;
the vibrator (8) is arranged in the vibration cavity (6) and is used for vibrating and stirring the entering oil;
the guide plate (10) is arranged in the degassing cavity (7) and is used for receiving the oil overflowed from the vibration cavity (6) and guiding the oil from the upper part of the degassing cavity (7) to the bottom;
the vacuum pump (11) is connected with the vacuum degassing bin (5) and is suitable for extracting air and enabling the space in the vacuum degassing bin (5) to form preset negative pressure when oil flows on the guide plate (10);
an oil inlet of the vacuum degassing bin (5) is connected with the oil tank (1) through an oil pipe, and an oil outlet of the vacuum degassing bin (5) is connected with the high-pressure pump (20) through an oil pipe;
an oil outlet of the vacuum degassing bin (5) is connected with the high-pressure pump (20) through an oil pipe; a flow sensor (19) is arranged on the oil outlet pipe of the normal pressure temporary storage bin, and the flow sensor (19) is used for detecting the flow of hydraulic oil flowing out of the normal pressure temporary storage bin; the first valve (13) and the second valve (12) are electric valves, the signal output end of the flow sensor (19) is electrically connected with the signal input end of the controller, the signal output end of the controller is electrically connected with the control ends of the first valve (13) and the second valve (12), and the first valve (13) and the second valve (12) are respectively opened or closed according to the command of the controller.
2. The parallel hydraulic machine oil supply system according to claim 1, wherein: the normal pressure temporary storage bin comprises an oil storage cavity (15) and a movable normal pressure piston (16) which is arranged in the oil storage cavity (15) in a matched mode, and the air pressure in the oil storage cavity (15) is regulated by changing the moving position of normal pressure movement in the oil storage cavity (15).
3. The parallel hydraulic machine oil supply system according to claim 2, wherein: the normal pressure temporary storage bin further comprises a driving device (17) for driving the normal pressure piston (16) to move;
an air pressure sensor (18) is arranged in the oil storage cavity (15) and used for detecting the air pressure in the oil storage cavity (15), and the signal output end of the air pressure sensor (18) is electrically connected with the signal input end of the controller;
the air pressure sensor (18) transmits the detected air pressure value to the controller, and the driving device (17) drives the normal pressure movement to move in the oil storage cavity (15) according to the command of the controller so as to adjust the air pressure in the oil storage cavity (15).
4. A parallel hydraulic machine oil supply system according to any one of claims 1 to 3, characterized in that: the guide plates (10) are arranged on the inner walls of one side of the baffle plate (9) and one side of the degassing cavity (7) in a staggered mode in sequence, and oil flows through the guide plates (10) in sequence and enters the bottom of the degassing cavity (7).
5. The parallel hydraulic machine oil supply system of claim 4, wherein: the guide plates (10) are respectively arranged in a downward inclined mode, and two adjacent guide plates (10) are in no contact.
6. The parallel hydraulic machine oil supply system of claim 4, wherein: the vacuum pump (11) extraction opening sets up the upper portion position in vacuum degassing storehouse (5), be equipped with liquid level sensor (14) in vacuum degassing storehouse (5), the signal output part of liquid level sensor (14) is connected with the signal input part electricity of controller, the signal output part of controller with the control end electricity of vacuum pump (11) is connected, liquid level sensor (14) are with the liquid level value transmission in vacuum degassing storehouse (5) for the controller, and vacuum pump (11) are according to the command decision start or close the extraction of controller.
7. The parallel hydraulic machine oil supply system according to claim 1, wherein: a second valve (12) is arranged on the oil pipe between the vacuum degassing bin (5) and the normal pressure temporary storage bin, the second valve (12) is an electric valve, the control end of the valve is also electrically connected with the signal output end of the controller, and the controller controls the valve to be opened or closed.
8. A parallel hydraulic machine oil supply system according to any one of claims 1 to 3, characterized in that: the first branch pipe (3) and the second branch pipe (4) are connected with the oil tank (1) through the engine oil filter (2).
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| CN110231462A (en) * | 2019-07-19 | 2019-09-13 | 贵州电网有限责任公司 | It is a kind of to pump out vibration hydraulic oil to detect the device and its application method of air content |
| CN110231463A (en) * | 2019-07-19 | 2019-09-13 | 贵州电网有限责任公司 | It is a kind of to pump out hand hydraulic oil to detect the device and its application method of air content |
| CN110739127A (en) * | 2019-09-20 | 2020-01-31 | 贵州电网有限责任公司 | ultrasonic degassing equipment for transformer oil change device and degassing method thereof |
| CN115289106B (en) * | 2022-10-10 | 2022-12-23 | 烟台中宇航空液压有限公司 | Oil filter of electrohydraulic servo valve |
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| CN105298950A (en) * | 2015-11-12 | 2016-02-03 | 北京科荣达新技术有限公司 | Fuel oil supply device with double pressurization oil tanks |
| CN208686676U (en) * | 2018-04-25 | 2019-04-02 | 中国人民解放军空军南京航空四站装备修理厂 | Water degassing vaccum fuel tank is removed suitable for double hydraulic system |
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2019
- 2019-04-10 CN CN201910283009.0A patent/CN109854571B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1152200A (en) * | 1965-09-20 | 1969-05-14 | Crouzet Sa | Oleopneumatic System for Simultaneously Balancing and Regulating the Speed of a Body which is Driven in Vertical Motion and Especially by a Pneumatic Jack |
| US4696684A (en) * | 1985-06-13 | 1987-09-29 | Hanshi Shen | Method and apparatus for eliminating cavitation in hydraulic systems |
| CN200951336Y (en) * | 2006-09-26 | 2007-09-26 | 聚昌科技股份有限公司 | Vacuum oscillation equipment for air-removing purification |
| CN1975183A (en) * | 2006-12-22 | 2007-06-06 | 浙江大学 | Pressure oil box for removing gas in hydraulic oil liquid |
| CN105298950A (en) * | 2015-11-12 | 2016-02-03 | 北京科荣达新技术有限公司 | Fuel oil supply device with double pressurization oil tanks |
| CN208686676U (en) * | 2018-04-25 | 2019-04-02 | 中国人民解放军空军南京航空四站装备修理厂 | Water degassing vaccum fuel tank is removed suitable for double hydraulic system |
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|---|---|
| CN109854571A (en) | 2019-06-07 |
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