CN112594241B - Hydraulic system - Google Patents
Hydraulic system Download PDFInfo
- Publication number
- CN112594241B CN112594241B CN202011614668.7A CN202011614668A CN112594241B CN 112594241 B CN112594241 B CN 112594241B CN 202011614668 A CN202011614668 A CN 202011614668A CN 112594241 B CN112594241 B CN 112594241B
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- Prior art keywords
- air duct
- oil
- communicated
- intercommunication
- oil pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000007789 gas Substances 0.000 claims description 24
- 239000011261 inert gas Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 8
- 229910052743 krypton Inorganic materials 0.000 claims description 4
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 90
- 239000010720 hydraulic oil Substances 0.000 description 11
- 238000009434 installation Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/26—Supply reservoir or sump assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to the technical field of hydraulic systems, in particular to a hydraulic system, which comprises an execution element and an oil pump, wherein the left end of the oil pump is communicated with a communicating pipe, the left end of the communicating pipe is communicated with the execution element, the right part of the oil pump is communicated with an oil delivery pipe, the top end of the oil delivery pipe is communicated with an oil tank, the oil tank is a closed container, the top end of the oil tank is provided with an inflation valve, the inflation valve is provided with an inflation port, the inflation port is communicated with a first air duct, the first air duct is communicated with a two-position three-way electromagnetic valve, the two-position three-way electromagnetic valve is provided with a P port, an R port and an S port, the P port is communicated with the first air duct, the S port is communicated with a second air duct, the other end of the second air duct is communicated with a pressurizing pump, the air inlet end of the pressurizing pump is communicated with a third air duct, and the left end of the third air duct is communicated with an air storage tank; the oil absorption is smoother, the condition of insufficient oil absorption is reduced, the efficiency of the hydraulic system is greatly improved, and the service lives of elements in the hydraulic system are also greatly prolonged.
Description
Technical Field
The invention relates to the technical field of hydraulic systems, in particular to a hydraulic system.
Background
The traditional hydraulic system is composed of an open oil tank unit (comprising hydraulic oil, an air exchanger, a heater, a liquid level device and the like), a power unit (comprising an oil pump, a motor and the like), a control unit (comprising a control software unit, a switch valve, a pressure valve, a flow valve and the like) and an execution unit (comprising an oil cylinder system, a motor system and the like).
At present, hydraulic systems in domestic markets all suck hydraulic oil into the oil pump from an oil tank through an oil suction pipe by self suction from the oil tank through the oil suction pipe, and then the control unit conveys high-pressure oil to the execution unit so as to complete the use function of the hydraulic systems.
Through searching, the patent publication No. CN206104821U discloses a vertical parting molding machine, which comprises a positive pressure plate assembly, a back pressure plate assembly, a molding chamber, a sand shooting system and a hydraulic system, wherein the positive pressure plate assembly comprises a positive pressure plate fixedly connected with a first cylinder body; the back pressure plate assembly comprises a back pressure plate fixedly connected with the second cylinder body; wherein, this hydraulic system includes: an energy supply, an open or closed pump, an electronic control valve, and an energy storage device; the utility model can improve the energy use efficiency of the vertical parting molding machine.
However, the system has the following defects that an air exchange device for exchanging air with outside air is arranged in the oil tank system, so that moisture or tiny impurities of the air can enter the oil tank system to pollute hydraulic oil in the oil tank, the failure rate of the hydraulic system is increased, the service life of the hydraulic oil is reduced, the hydraulic pump in the power unit sucks the hydraulic oil into the system by self suction, the internal pressure of the oil tank is equal to the outside atmospheric pressure because the oil tank is open and communicated with the outside air, and when the installation position of the power unit is higher than that of the oil tank unit, the difficulty or the shortage of oil absorption can occur, the pressure of the hydraulic system is insufficient, the energy loss is serious, and the oil pump in the power unit can be damaged seriously.
Disclosure of Invention
(One) solving the technical problems
Aiming at the defects of the prior art, the invention provides the hydraulic system which has smoother oil absorption, reduces the condition of insufficient oil absorption, improves the efficiency of the hydraulic system and prolongs the service life of elements in the hydraulic system.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a hydraulic system, includes actuating element and oil pump, oil pump left end intercommunication has communicating pipe, communicating pipe ' S left end with actuating element intercommunication, oil pump ' S right part all communicates there is the oil delivery pipe, oil delivery pipe ' S top intercommunication has the oil tank, the oil tank is airtight container, the top of oil tank is provided with the inflation valve, the inflation valve is provided with the inflation inlet, the inflation inlet intercommunication has first air duct, first air duct intercommunication has two-position three-way solenoid valve, two-position three-way solenoid valve is provided with P mouth, R mouth and S mouth, P mouth and first air duct intercommunication, S mouth intercommunication has the second air duct, the other end intercommunication of second air duct has the force (forcing) pump, the inlet end intercommunication of force (forcing) pump has the third air duct, the left end intercommunication of third air duct has the gas storage box, the inside of gas storage box is provided with inert gas, the upper portion intercommunication of gas storage box has the fourth air duct, the other end intercommunication of fourth air duct has the suction pump, the inlet and the R mouth communicates with the first air duct, the first air duct and the first air duct intercommunication, the first air duct of pressure sensor and the pressure sensor all has the pressure sensor, the suction pump is installed to have the pressure sensor to install through the first air duct.
Preferably, a liquid level sensor is installed at the top end of the oil tank, a control electromagnetic valve is installed in the middle of the charging valve, and the control electromagnetic valve is electrically connected with the control panel.
Preferably, the oil pump comprises a first oil pump and a second oil pump, the left end of the first oil pump is communicated with a first communicating pipe, the left end of the second oil pump is communicated with a second communicating pipe, two executing elements are arranged, and the left end of the first communicating pipe and the left end of the second communicating pipe are respectively communicated with the corresponding executing elements; two executive components are controlled respectively through the first oil pump and the second oil pump, so that power is conveniently provided for different structures simultaneously, and the middle parts of the first communicating pipe and the second communicating pipe are provided with switch valves.
Preferably, the middle parts of the first communicating pipe and the second communicating pipe are respectively provided with a switch valve; different hydraulic pipelines are controlled through the switch valve, so that the starting and stopping of different execution elements are conveniently controlled, and the practicability is improved.
Preferably, the first oil pump is communicated with the second oil pump, the first oil pump is connected with a motor, and the motor is electrically connected with the control panel.
Preferably, the second pressure sensor is installed to the inner wall of gas receiver, the controller is installed to the left end bottom of gas receiver, the alarm is installed on the top of gas receiver, the alarm with the controller electricity is connected.
Preferably, the inert gas is krypton.
(III) beneficial effects
Compared with the prior art, the invention provides a hydraulic system, which has the following beneficial effects:
The invention provides a hydraulic system, which is changed from a traditional open oil tank into a closed oil tank, an air exchanger exchanging with air in the traditional hydraulic system is omitted, the interior of the oil tank is isolated from the external environment, an inflation valve is arranged, inert gas with certain pressure is filled into the oil tank through the inflation valve, so that external air, moisture and impurities cannot enter the oil tank, hydraulic oil cannot be polluted by the outside, the failure rate is reduced, the service life of the hydraulic oil can be greatly prolonged, the pressure in the oil tank can be higher than the external pressure due to the fact that the filled inert gas has certain pressure, the installation of a power unit is not influenced by the installation position, the high-pressure inert gas can press the hydraulic oil into an oil suction port of a hydraulic pump, the oil suction is smoother, the condition of insufficient oil suction is reduced, the efficiency of the hydraulic system can be greatly improved, and the service life of elements in the hydraulic system can also be greatly improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic circuit diagram of the present invention;
fig. 3 is a circuit schematic of the present invention.
In the figure: 1. an actuator; 2. an oil pump; 3. a communicating pipe; 4. an oil delivery pipe; 5. an oil tank; 6. an inflation valve; 7. a first air duct; 8. a two-position three-way electromagnetic valve; 9. a second air duct; 10. a pressurizing pump; 11. a third air duct; 12. a gas storage tank; 13. a fourth air duct; 14. a getter pump; 15. a first pressure sensor; 16. a control panel; 17. a liquid level sensor; 18. controlling an electromagnetic valve; 19. a first oil pump; 20. a second oil pump; 21. a first communication pipe; 22. a second communicating pipe; 23. a switch valve; 24. a motor; 25. a second pressure sensor; 26. a controller; 27. an alarm; 28. and a fifth air duct.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples:
Referring to fig. 1-3, a hydraulic system includes an actuator 1 and an oil pump 2, wherein a communicating pipe 3 is communicated with the left end of the oil pump 2, the left end of the communicating pipe 3 is communicated with the actuator 1, the right part of the oil pump 2 is communicated with an oil delivery pipe 4, the top end of the oil delivery pipe 4 is communicated with an oil tank 5, the oil tank 5 is a closed container, the oil pump 2 includes a first oil pump 19 and a second oil pump 20, the left end of the first oil pump 19 is communicated with a first communicating pipe 21, the left end of the second oil pump 20 is communicated with a second communicating pipe 22, the actuators 1 are provided with two, and the left end of the first communicating pipe 21 and the left end of the second communicating pipe 22 are respectively communicated with corresponding actuators 1; the two execution elements 1 are respectively controlled by the first oil pump 19 and the second oil pump 20, so that power can be conveniently provided for different structures simultaneously, the middle parts of the first communicating pipe 21 and the second communicating pipe 22 are respectively provided with a switch valve 23, and the middle parts of the first communicating pipe 21 and the second communicating pipe 22 are respectively provided with a switch valve 23; different hydraulic pipelines are controlled through the switch valve 23, so that the starting and stopping of different execution elements 1 are conveniently controlled, the practicability is improved, the first oil pump 19 is communicated with the second oil pump 20, the first oil pump 19 is connected with the motor 24, and the motor 24 is electrically connected with the control panel 16; the on-off of the motor 24 is controlled through the control panel 16, so that the on-off of the first oil pump 19 and the second oil pump 20 is conveniently controlled, and when the internal pressure of the oil tank 5 is overlarge, the motor 24 is controlled to be closed through the control panel 16, so that the condition of overlarge internal pressure of the oil tank 5 is reduced.
Further, an inflation valve 6 is arranged at the top end of the oil tank 5, the inflation valve 6 is provided with an inflation port, the inflation port is communicated with a first air duct 7, the first air duct 7 is communicated with a two-position three-way electromagnetic valve 8, the two-position three-way electromagnetic valve 8 is provided with a P port, an R port and an S port, the P port is communicated with the first air duct 7, the S port is communicated with a second air duct 9, the other end of the second air duct 9 is communicated with a booster pump 10, the air inlet end of the booster pump 10 is communicated with a third air duct 11, the left end of the third air duct 11 is communicated with an air storage tank 12, inert gas is arranged in the air storage tank 12, and the inert gas is krypton; the krypton gas has lower cost, so that the manufacturing cost is reduced, the upper part of the gas storage tank 12 is communicated with a fourth gas guide pipe 13, the other end of the fourth gas guide pipe 13 is communicated with a suction pump 14, the gas inlet end and an R port of the suction pump 14 are communicated through a fifth gas guide pipe 28, a first pressure sensor 15 is arranged at the upper part of the oil tank 5, a control panel 16 is arranged at the right end of the oil tank 5, the first pressure sensor 15, a two-position three-way electromagnetic valve 8, the suction pump 14 and the booster pump 10 are all electrically connected with the control panel 16, a liquid level sensor 17 is arranged at the top end of the oil tank 5, a control electromagnetic valve 18 is arranged in the middle of the inflation valve 6, and the control electromagnetic valve 18 is electrically connected with the control panel 16; after the liquid level sensor 17 senses a liquid level signal, the liquid level signal is transmitted to the control panel 16, the control panel 16 transmits the signal to the control electromagnetic valve 18, the control electromagnetic valve 18 is closed, the inflation valve 6 is blocked, the condition that oil enters the inflation valve 6 is reduced, a second pressure sensor 25 is arranged on the inner wall of the gas storage tank 12, a controller 26 is arranged at the bottom of the left end of the gas storage tank 12, an alarm 27 is arranged at the top end of the gas storage tank 12, and the alarm 27 is electrically connected with the controller 26; the gas is stored by the gas storage tank 12, and when the pressure in the gas storage tank 12 is too high and too low, the alarm 27 alarms, so that the reminding of a user is facilitated; the control panel 16 is used for controlling the first pressure sensor 15, the two-position three-way electromagnetic valve 8, the suction pump 14 and the pressurizing pump 10, and transmitting pressure values through the first pressure sensor 15, after exceeding a certain pressure value, the control panel 16 triggers the two-position three-way electromagnetic valve 8 to enable the P port to be communicated with the R port, and partial inert gas is transmitted into the gas storage tank 12 through the suction pump 14, the traditional open type oil tank 5 is changed into the sealed oil tank 5, an air exchanger which exchanges with air in the traditional hydraulic system is omitted, the inside of the oil tank 5 is isolated from the external environment, the charging valve 6 is arranged, inert gas with certain pressure is flushed into the oil tank 5 through the charging valve 6, so that external air, moisture and impurities cannot enter the oil tank 5, the failure rate is reduced, the service life of the hydraulic oil is greatly prolonged, and because the flushed inert gas has certain pressure, the pressure in the oil tank 5 is higher than the external pressure, the installation of a power unit is not influenced by the installation position, the high-pressure inert gas can enable the oil suction port of the hydraulic oil to be pressed into the hydraulic pump, the oil suction port of the hydraulic oil is smoother, the oil suction efficiency is greatly reduced, the oil suction efficiency is greatly, the service life of the hydraulic components in the hydraulic system is greatly prolonged, and the service life of the hydraulic system is greatly prolonged.
The working process comprises the following steps: the control panel 16 controls the first pressure sensor 15, the two-position three-way electromagnetic valve 8, the suction pump 14 and the pressurizing pump 10, the pressure value is transmitted through the first pressure sensor 15, after the first pressure sensor 15 exceeds a certain pressure value, the control panel 16 triggers the two-position three-way electromagnetic valve 8 to enable the P port to be communicated with the R port, and part of inert gas is transmitted into the gas storage tank 12 through the suction pump 14.
The actuator 1 comprises a cylinder system, a motor system, etc., which are conventional components of a common hydraulic system in combination with the actuator.
The control panel is JZ-20, the first oil pump is S-50, the second oil pump is S-125, the first pressure sensor is SIN-P300, the second pressure sensor is SIN-P300, the pressurizing pump is CM5-4, the suction pump is T0103242, the controller is JZ-9, which are conventional components available in the market and are well known to those skilled in the art, and therefore the description is omitted.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. Hydraulic system comprising an actuator (1), characterized in that: still include oil pump (2), oil pump (2) left end intercommunication has communicating pipe (3), communicating pipe (3) left end with actuating element (1) intercommunication, oil pump (2) right part all communicates there is oil delivery pipe (4), oil delivery pipe (4) ' S top intercommunication has oil tank (5), oil tank (5) are airtight container, oil tank (5) ' S top is provided with inflation valve (6), inflation valve (6) are provided with the inflation inlet, inflation inlet intercommunication has first air duct (7), first air duct (7) intercommunication has two-position three way solenoid valve (8), two-position three way solenoid valve (8) are provided with P mouth, R mouth and S mouth, P mouth and first air duct (7) intercommunication, S mouth intercommunication has second air duct (9), second air duct (9) ' S the other end intercommunication has force (10), the air inlet intercommunication of force (10) has third air duct (11), the air duct (11) intercommunication has first air duct (12) of left air duct (7), air duct (12) intercommunication has air intake (13) of four air duct (13) inside, air duct (13) intercommunication has, the air inlet end and the R port of the suction pump (14) are communicated through a fifth air duct (28), a first pressure sensor (15) is arranged at the upper part of the oil tank (5), a control panel (16) is arranged at the right end of the oil tank (5), and the first pressure sensor (15), the two-position three-way electromagnetic valve (8), the suction pump (14) and the booster pump (10) are electrically connected with the control panel (16);
a liquid level sensor (17) is arranged at the top end of the oil tank (5), a control electromagnetic valve (18) is arranged in the middle of the charging valve (6), and the control electromagnetic valve (18) is electrically connected with the control panel (16);
The oil pump (2) comprises a first oil pump (19) and a second oil pump (20), wherein a first communicating pipe (21) is communicated with the left end of the first oil pump (19), a second communicating pipe (22) is communicated with the left end of the second oil pump (20), two executing elements (1) are arranged, and the left end of the first communicating pipe (21) and the left end of the second communicating pipe (22) are respectively communicated with the corresponding executing elements (1);
The middle parts of the first communicating pipe (21) and the second communicating pipe (22) are respectively provided with a switch valve (23);
the first oil pump (19) is communicated with the second oil pump (20), the first oil pump (19) is connected with a motor (24), and the motor (24) is electrically connected with the control panel (16);
The inner wall of gas receiver (12) is installed second pressure sensor (25), controller (26) are installed to the left end bottom of gas receiver (12), alarm (27) are installed on the top of gas receiver (12), alarm (27) with controller (26) electricity is connected.
2. A hydraulic system according to claim 1, wherein: the inert gas is krypton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011614668.7A CN112594241B (en) | 2020-12-30 | 2020-12-30 | Hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011614668.7A CN112594241B (en) | 2020-12-30 | 2020-12-30 | Hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112594241A CN112594241A (en) | 2021-04-02 |
| CN112594241B true CN112594241B (en) | 2024-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011614668.7A Active CN112594241B (en) | 2020-12-30 | 2020-12-30 | Hydraulic system |
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| Country | Link |
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| CN (1) | CN112594241B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114046280A (en) * | 2021-11-12 | 2022-02-15 | 无锡非莱液压科技有限公司 | Hydraulic system with lubricating structure and process |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214837443U (en) * | 2020-12-30 | 2021-11-23 | 顺平县犇创机电设备制造有限责任公司 | Hydraulic system |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4990061A (en) * | 1987-11-03 | 1991-02-05 | Fowler Elton D | Fluid controlled gas lift pump |
| US5361594A (en) * | 1991-03-11 | 1994-11-08 | Young Robert E | Refrigeration recovery and purification |
| CN204300682U (en) * | 2014-10-16 | 2015-04-29 | 郑州朗润石油设备有限公司 | For the pipeline control system of hydraulic piston type compressor |
| CN106837896B (en) * | 2017-04-07 | 2018-06-22 | 北京机械设备研究所 | A kind of hydraulic oil container of simulated high altitude hypobaric |
| CN206943101U (en) * | 2017-07-06 | 2018-01-30 | 中铁工程装备集团有限公司 | A kind of closed booster station of nonstatic |
| CN107228097B (en) * | 2017-07-06 | 2019-04-12 | 中铁工程装备集团有限公司 | A kind of closed booster station of nonstatic and its control method |
| CN207808396U (en) * | 2017-10-23 | 2018-09-04 | 天津蓝科机械有限公司 | A kind of novel oil temperature machine |
| CN208439801U (en) * | 2018-06-12 | 2019-01-29 | 博世力健环保科技（益阳）有限公司 | The Mobile garbage compression box hydraulic system of integrated power source |
| CN110284998A (en) * | 2019-07-24 | 2019-09-27 | 马俊奇 | A kind of oil saver for gasoline engine system |
| CN211398089U (en) * | 2019-12-28 | 2020-09-01 | 无锡华控赛思节能技术有限公司 | Energy-saving pressure-maintaining type hydraulic station |
| CN111137462A (en) * | 2019-12-30 | 2020-05-12 | 航天时代飞鸿技术有限公司 | Large-scale freight unmanned aerial vehicle fuel system and control method thereof |
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2020
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214837443U (en) * | 2020-12-30 | 2021-11-23 | 顺平县犇创机电设备制造有限责任公司 | Hydraulic system |
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