CN106931004B - Platform is cleared up for base level, Relay and Base Level hydraulic system - Google Patents
Platform is cleared up for base level, Relay and Base Level hydraulic system Download PDFInfo
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- CN106931004B CN106931004B CN201710091993.1A CN201710091993A CN106931004B CN 106931004 B CN106931004 B CN 106931004B CN 201710091993 A CN201710091993 A CN 201710091993A CN 106931004 B CN106931004 B CN 106931004B
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- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
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- 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 discloses one kind clearing up platform for base level, Relay and Base Level hydraulic system.Including hydraulic control system, hydraulic power unit, hydraulic assist unit and integrated valve path system；Wherein, the hydraulic control system is used to control the oil circuit output of hydraulic power unit；Wherein, the hydraulic power unit is connect with integrated valve path system, is exported for dynamic Control；Wherein, the integrated valve path system includes fuel-displaced filtering；Wherein, the hydraulic assist unit coordinates for the function of cleaned system platform.Volume hydraulic system of the present invention cleaning platform application in the pipeline of hydraulic system, for testing hydraulic actuating mechanism function, cleaning hydraulic hose and hard tube and for for hydraulic system displacement, filling hydraulic oil, with the function for the repairing of hydraulic system, cleaning, filling, it is small with structural volume, it is easy to carry.
Description
Technical field
The invention belongs to the repairing of hydraulic system, cleaning, loading technique field, more particularly to one kind for base level,
Relay and Base Level hydraulic system clear up platform.
Background technology
The quality of one hydraulic system depends not only on the quality of the reasonability and system element performance of system design, also
Because of the pollution protection and processing of system, the pollution of system directly affects the reliability of hydraulic work system and the use longevity of element
Life, according to statistics, hydraulic system fault both domestic and external about 70% is caused by pollution.
Oil contamination is mainly as follows to the harm of system：
1) contamination wear of element
Various pollutants cause the various forms of abrasions of element in fluid, and solid particle enters in pair clearance, to zero
Part surface generates cutting abrasion or fatigue wear.Solid particle in high speed liquid flow causes erosion to be ground the surface impacts of element
Damage.The product of water and fluid oxidation deterioration in fluid generates corrosiveness to element.In addition, the air in the fluid of system
Cause to cavitate, element surface is caused to degrade and destroy.
2) element blocks and clamping failure
The gap and aperture of solid particle plugging fluid pressure valve cause spool obstruction and clamping, influence working performance, or even lead
Cause serious accident.
3) accelerate the deterioration of fluid performance
Water and air in fluid is with the essential condition that its thermal energy is fluid oxidation, and the metal particle in fluid is to fluid
Oxidation play important catalytic action, in addition, the water and suspended bubble in fluid significantly reduce oily film strength between kinematic pair, make
Greasy property reduces.
One, the type of pollutant
Pollutant is the substance for playing damaging effect in hydraulic system oil liquid to system, it is in fluid in the form of different
Form exists, and can be divided into according to its physical aspect：Solid contaminant, fluid contaminants, gaseous pollutant.
Solid contaminant can be divided into hard pollutant, have：Diamond, cutting, silicon sand, dust, wear metal and metal oxygen
Compound；Soft pollutant has：Staple, the fibre brought into when additive, the condensation product of water, the decomposition product of oil plant and polymer and repair
Dimension.
Fluid contaminants are typically not meet grooving fluid, water, coating and chlorine and its halide of system requirements etc., usually
We are difficult to remove, so selector is wanted to close the hydraulic oil of system standard when selecting hydraulic oil, avoid some unnecessary events
Barrier.
Gaseous pollutant is mainly the air being mixed into system.
These particles are often so tiny, so that it cannot precipitate and be suspended among fluid, are finally squeezed
To among the gap of various valves, for a reliable hydraulic system, these gaps to realize limited control, importance and
Accuracy is particularly important.
Two, the source of pollutant：
The available sources of pollutant mainly have the following aspects in system fluid：
1) the external pollutant invaded：Outside intrusion pollutant is mainly grit or dust in air, usually passes through oil
Case stomata, the envelope axis of oil cylinder, pump and the isometric invasive system of motor.The mainly influence of use environment.
2) internal contamination object：Element in processing, assembly, debugging, packaging, storage, remain in the links such as transport and installation
Pollutant, these certain processes are unavoidable, but can be preferably minimized, some special components are in assembly and debugging
It needs to carry out in the environment of toilet or clean bench.
3) pollutant that hydraulic system generates：The particle that system is generated in operation due to the abrasion of element,
The sand grains split away off on casting, the metallic particles for pumping, being split away off on valve and connector, pipeline inner rust lose spall with its fluid
Oxidation and decompose generate particle and jelly, more seriously system pipeline formally input operation before through overshoot
The a large amount of impurity washed and had.
Oil circuit and its internal environment for base level, Relay and Base Level hydraulic system are cleaned, detected and are added
Oiling, there are no relevant integration apparatus to carry out above-mentioned function in the prior art.
Invention content
The purpose of the present invention is to provide one kind clearing up platform for base level, Relay and Base Level hydraulic system, leads to
The oily equipment of integration cleaning, detection and filling is crossed, solves the oil circuit of existing base level, Relay and Base Level hydraulic system
And its internal environment maintenance process is complicated, problem.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions：
The present invention is a kind of for base level, Relay and Base Level hydraulic system cleaning platform, including hydraulic control system
System, hydraulic power unit, hydraulic assist unit and integrated valve path system；Wherein, the hydraulic control system is for controlling hydraulic pressure
The oil circuit of power unit exports；Wherein, the hydraulic power unit is connect with integrated valve path system, is exported for dynamic Control；
Wherein, the integrated valve path system includes fuel-displaced filtering；Wherein, the hydraulic assist unit is used for the function of cleaned system platform
Cooperation.
Further, further include cooling system, control unit, test cell and oil pumping unit；
Wherein, the cooling system is used for the control of oil temperature；The output hydraulic pressure oil of the hydraulic power unit is through supercooling
It is output to hydraulic control system after system cooling；
Wherein, the electrical control of described control unit cleaned system platform；
Wherein, the test cell is cleaned hydraulic system for testing；The test cell includes test valve block, plug
And connector；
Wherein, the oil pumping unit includes electric-motor pump, pipeline and oil suction filter core；The oil pumping unit is used for being cleaned liquid
Hydraulic oil in pressure system extract or is inputted to cleaned system platform fuel feeding.
Further, further include mobile vehicle, for the movement of hydraulic system cleaning platform, the mobile vehicle is using shifting
It moves the position that dynamic trolley is used to clear up hydraulic system platform.
Further, the hydraulic power unit includes motor and hydraulic pump；The motor and hydraulic pressure pump group are at high-voltage electricity
Pump.
Further, the hydraulic control system includes hand-operated direction valve, control valve block and pressure regulator valve.
Further, the hydraulic assist unit includes return filter, fuel tank, pressure gauge, liquid level alarm, air mistake
Filter and pipe-line system；The liquid level alarm is used to detect the liquid level in fuel tank, when liquid level is less than setting value, liquid level warning
Device is alarmed.
The invention has the advantages that：
The present invention hydraulic system clear up platform application in the pipeline of hydraulic system, for testing hydraulic actuating mechanism work(
Can, cleaning hydraulic hose and hard tube and for for hydraulic system displacement, filling hydraulic oil, having the repairing for hydraulic system, clear
The function of wash, filling has structural volume small, easy to carry.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the system diagram that the present invention clears up platform for base level, Relay and Base Level hydraulic system；
Fig. 2 is the schematic diagram that the present invention clears up platform for base level, Relay and Base Level hydraulic system.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
It please refers to Fig.1 with shown in Fig. 2, the present invention is a kind of for base level, Relay and the cleaning of Base Level hydraulic system
Platform, including hydraulic control system, hydraulic power unit, hydraulic assist unit and integrated valve path system；
Wherein, hydraulic control system is used to control the oil circuit output of hydraulic power unit；
Wherein, hydraulic power unit is connect with integrated valve path system, is exported for dynamic Control；
Wherein, integrated valve path system includes fuel-displaced filtering；Fuel-displaced filtering uses high pressure fine filter
Wherein, hydraulic assist unit coordinates for the function of cleaned system platform.
Wherein, further include cooling system, control unit, test cell and oil pumping unit；
Wherein, cooling system is used for the control of oil temperature；The output hydraulic pressure oil of hydraulic power unit is cooled down by cooling system
After be output to hydraulic control system；
Wherein, the electrical control of control unit cleaned system platform；
Wherein, test cell is cleaned hydraulic system for testing；Test cell includes test valve block, plug and connector；
Wherein, oil pumping unit includes electric-motor pump, pipeline and oil suction filter core；Oil pumping unit is used for being cleaned in hydraulic system
Hydraulic oil carry out extract or to cleaned system platform fuel feeding input.
Wherein, further include mobile vehicle, for the movement of hydraulic system cleaning platform, mobile vehicle is used using moving trolley
It is moved in the position for clearing up hydraulic system platform.
Wherein, hydraulic power unit includes motor 1 and hydraulic pump 2；Motor 1 and hydraulic pump 2 form high-tension electricity pump.
Wherein, hydraulic control system includes hand-operated direction valve 6, control valve block 8 and pressure regulator valve 7.
Wherein, hydraulic assist unit include return filter 3, fuel tank 4, pressure gauge 5, liquid level alarm, greasy dirt indicator,
Air filter and pipe-line system；Liquid level alarm is used to detect the liquid level in fuel tank, when liquid level is less than setting value, liquid level report
Alert device alarm.The filtering accuracy of the cleaning device is high, frequent in use, filter core can pollute, observes oil return filter greasy dirt
The oil pressure of indicator, it is to be instructed to yellow area when, need to change return filter and the filter core of high pressure refined filtration.
By hydraulic control system, hydraulic power unit, hydraulic assist unit and integrated valve path system；The hydraulic system of composition
Cleaning plant.By hydraulic control system, hydraulic power unit, hydraulic assist unit, integrated valve path system, cooling system, control
Unit, test cell and oil pumping unit are integrated on a structure pedestal.The use process of the device is：
The first step：Hydraulic system cleaning device is taken out from packing case, is installed knob to trolley by screw, nut.
Second step：Fuel sucking pipe is inserted into clean hydraulic oil, input power plug is connected into 220V power supplys, oil pumping is single
The switch spanner of member clicks the attached pump start button in control unit to the positions ON, notices whether fuel sucking pipe has fluid to flow into (if nothing
Fluid flows into, and please adjust power cord plug direction), if normal, press attached pump start button, the oil tank liquid level indicator 1/ of oiling
At 3.
Third walks：Pressure regulation.Valve valve block in the block will be tested to be blocked with plug, and screwed, pressure regulator valve is unclamped, by manual reverse of direction
Valve is pulled to middle position；Main pump start button is pressed, hand-operated direction valve is moved, pressure regulator valve pressure, observation control are adjusted with allen wrench
The oil pressure of unit processed indicates, after pressure adjusts 15Mpa, locks pressure regulator valve, and hand-operated direction valve is resetted, press main pump stop by
Button.
The technical indicator that the hydraulic system clears up platform is as follows,
Output pressure：3~16MPa；
Output flow：8L/min；
Filtering accuracy：5μm；
Power of motor：2.2KW；
Supply voltage：220ACV；
The use environment condition that the hydraulic system clears up platform is as follows,
A) storage temperature：- 10 DEG C~40 DEG C；
B) operating temperature：0 DEG C~50 DEG C；
C) relative humidity：80% ± 3%, 35 DEG C ± 2 DEG C.
High-voltage motor pump station structure feature and operation principle：
Structure feature
A) oil pump in high-tension electricity pump is plunger type small flow high pressure pump, plunger pump by the pump housing, plunger matching parts, pump shaft,
It is formed into the part such as draining valve.Motor key connection pump shaft drives rotation.When motor drives pump shaft rotation, due to pitch
Effect, plunger make after plunger bushing above and below move back and forth, hydraulic oil is sucked through inlet valve, and is discharged through draining valve, is collected in
Together, into oil piping system.
B) control valve is made of components such as safety valve, check valve, unloading valve, valve bodies.The effect of control valve is control and adjusts
The pressure and flow direction of fuel-economizing stream.Safety valve is the pressure of control system.Oil of the unloading valve in oil pump off-load by oil pump discharge passes through
Unloading valve flows into fuel tank.
C) pressure of oil pump is set up by safety valve, and when pressure is higher than setting, high-pressure safety valve is opened, and pressure is made to keep
Stablize.After completing scheduled job requirement, the oil for rotating off-load knob, actuator inner fluid and plunger and plunger pump discharge passes through
Unloading valve flows back to fuel tank, oil pump off-load.
Working service points for attention：
A) the working oil liquid medium of hydraulic system cleaning platform must be identical as system.
B) liquid level of fuel tank should be maintained at fluid level indicator 2/3 or so, be emptied to prevent liquid pump.When oiling, absolute oil should be used
Device filtering is filled to fuel tank.
C) normal work oil temperature is 20 DEG C~50 DEG C.When high oil temperature, needs to take startup cooling or main pump stops, waiting for oil
After liquid is fully cooled, it could use；When temperature is too low, does not allow directly to work, heating measure need to be taken, can by it is outer heating or
Low-pressure operation improves oil temperature.
D) before electric motor starting, hand-operated direction valve need to be got to middle position, to prevent motor overload, then crawl motor several times,
Exclude air.
E when) high-pressure hose dispatches from the factory, pressure test was carried out, when used for a long time, due to the aging of colloid, damage everywhere
Cause the reduction of sebific duct compressive resistance, it should be noted that inspect periodically, using frequent person, general every half a year checks primary.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the present invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to preferably explain the present invention
Principle and practical application, to enable skilled artisan to be best understood by and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (1)
1. clearing up platform for base level, Relay and Base Level hydraulic system, it is characterised in that：Including hydraulic control system,
Hydraulic power unit, hydraulic assist unit and integrated valve path system；
Wherein, the hydraulic control system is used to control the oil circuit output of hydraulic power unit；
Wherein, the hydraulic power unit is connect with integrated valve path system, is exported for dynamic Control；
Wherein, the integrated valve path system includes fuel-displaced filtering；
Wherein, the hydraulic assist unit coordinates for the function of cleaned system platform；
Further include cooling system, control unit, test cell and oil pumping unit；
Wherein, the cooling system is used for the control of oil temperature；The output hydraulic pressure oil of the hydraulic power unit passes through cooling system
Hydraulic control system is output to after cooling；
Wherein, the electrical control of described control unit cleaned system platform；
Wherein, the test cell is cleaned hydraulic system for testing；The test cell includes test valve block, plug and connects
Head；
Wherein, the oil pumping unit includes electric-motor pump, pipeline and oil suction filter core；The oil pumping unit is used for being cleaned hydraulic pressure system
Hydraulic oil in system extract or is inputted to cleaned system platform fuel feeding；
Further include mobile vehicle, the movement for hydraulic system cleaning platform；
The hydraulic power unit includes motor (1) and hydraulic pump (2)；The motor (1) and hydraulic pump (2) form high-voltage motor
Pump；
The hydraulic control system includes hand-operated direction valve (6), control valve block (8) and pressure regulator valve (7)；
The hydraulic assist unit includes return filter (3), fuel tank (4), pressure gauge (5), liquid level alarm, air filter
And pipe-line system；The liquid level alarm is used to detect the liquid level in fuel tank, when liquid level is less than setting value, liquid level alarm report
It is alert；
The hydraulic system cleaning platform use process be：
The first step：Hydraulic system cleaning device is taken out from packing case, is installed knob to trolley by screw, nut；
Second step：Fuel sucking pipe is inserted into clean hydraulic oil, input power plug is connected into 220V power supplys, by oil pumping unit
Switch spanner clicks the attached pump start button in control unit, notices whether fuel sucking pipe has fluid inflow to the positions ON, if normal,
Attached pump start button is pressed, is refueled to oil tank liquid level indicator 1/3；
Third walks：Pressure regulation will be tested valve valve block in the block and be blocked with plug, and screws, and unclamps pressure regulator valve, hand-operated direction valve is pulled
To middle position；Main pump start button is pressed, hand-operated direction valve is pulled, adjusts pressure regulator valve pressure with allen wrench, observation control is single
The oil pressure instruction of member, after pressure adjusts 15Mpa, locks pressure regulator valve, and hand-operated direction valve is resetted, presses main pump stop button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710091993.1A CN106931004B (en) | 2017-02-21 | 2017-02-21 | Platform is cleared up for base level, Relay and Base Level hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710091993.1A CN106931004B (en) | 2017-02-21 | 2017-02-21 | Platform is cleared up for base level, Relay and Base Level hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106931004A CN106931004A (en) | 2017-07-07 |
| CN106931004B true CN106931004B (en) | 2018-08-14 |
Family
ID=59423741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710091993.1A Active CN106931004B (en) | 2017-02-21 | 2017-02-21 | Platform is cleared up for base level, Relay and Base Level hydraulic system |
Country Status (1)
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| CN (1) | CN106931004B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201249188Y (en) * | 2008-08-21 | 2009-06-03 | 上海伟司机械设备有限公司 | Dual-frequency converting hydraulic pipeline cleaning device |
| CN103115039A (en) * | 2013-03-15 | 2013-05-22 | 金川集团股份有限公司 | Rapid cleaning method of hydraulic system closed loop circuit |
| CN203962563U (en) * | 2014-04-18 | 2014-11-26 | 西安煤矿机械有限公司 | Coal winning machine hydraulic oil forces filtrating equipment |
| CN204412714U (en) * | 2015-01-04 | 2015-06-24 | 洛阳理工学院 | Hydraulic system pipeline decontamination apparatus under a kind of dynamic hydraulic combined exciting |
| CN204533062U (en) * | 2015-01-28 | 2015-08-05 | 精功（武汉）环保研究院有限公司 | A kind of oil temperature cooling mechanism for horizontal environmental sanitation garbage compression station |
| CN106286486A (en) * | 2016-10-28 | 2017-01-04 | 中国地质大学（北京） | A kind of Multifunctional navigation Hydraulic service car |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0262392A (en) * | 1988-08-26 | 1990-03-02 | Mitsubishi Electric Corp | Hydraulic oil power unit for hydraulic elevator |
-
2017
- 2017-02-21 CN CN201710091993.1A patent/CN106931004B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201249188Y (en) * | 2008-08-21 | 2009-06-03 | 上海伟司机械设备有限公司 | Dual-frequency converting hydraulic pipeline cleaning device |
| CN103115039A (en) * | 2013-03-15 | 2013-05-22 | 金川集团股份有限公司 | Rapid cleaning method of hydraulic system closed loop circuit |
| CN203962563U (en) * | 2014-04-18 | 2014-11-26 | 西安煤矿机械有限公司 | Coal winning machine hydraulic oil forces filtrating equipment |
| CN204412714U (en) * | 2015-01-04 | 2015-06-24 | 洛阳理工学院 | Hydraulic system pipeline decontamination apparatus under a kind of dynamic hydraulic combined exciting |
| CN204533062U (en) * | 2015-01-28 | 2015-08-05 | 精功（武汉）环保研究院有限公司 | A kind of oil temperature cooling mechanism for horizontal environmental sanitation garbage compression station |
| CN106286486A (en) * | 2016-10-28 | 2017-01-04 | 中国地质大学（北京） | A kind of Multifunctional navigation Hydraulic service car |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106931004A (en) | 2017-07-07 |
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