CN109114049A - A kind of assembling machine sealed reservoir system - Google Patents
A kind of assembling machine sealed reservoir system Download PDFInfo
- Publication number
- CN109114049A CN109114049A CN201811133661.6A CN201811133661A CN109114049A CN 109114049 A CN109114049 A CN 109114049A CN 201811133661 A CN201811133661 A CN 201811133661A CN 109114049 A CN109114049 A CN 109114049A
- Authority
- CN
- China
- Prior art keywords
- fuel tank
- valve group
- oil
- control valve
- assembling machine
- 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.)
- Pending
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
-
- 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
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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)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
The present invention relates to assembling machine technical fields, disclose a kind of assembling machine sealed reservoir system, wherein, assembling machine sealed reservoir system includes oil cylinder, oil pump, fuel tank, control valve group, overflow valve group and accumulator, the connection of the oiler of the fuel tank and oil pump, the oil outlet of the oil pump and the P mouth of control valve group connect, and the A mouth of the control valve group is connect with the rodless cavity of oil cylinder, the rod chamber of the oil cylinder and the B mouth of control valve group connect, the connection of the T mouth and fuel tank of the control valve group；The first ball valve, check valve and first filter are disposed on the hydraulic pump and control valve group P mouthfuls of connecting line；The second ball valve and the second filter are disposed on the fuel tank and control valve group T mouthfuls of connecting line；The oil outlet of the accumulator is connect with fuel tank, and third ball valve is provided on the connecting line of the accumulator and fuel tank.Oil tank system of the invention cancels assembling machine revolution drag chain and revolution pulley mechanism, reduces the complexity of assembling machine mechanism.
Description
Technical field
The present invention relates to assembling machine technical fields, more particularly to a kind of assembling machine sealed reservoir system.
Background technique
Complete-section tunnel boring machine is also referred to as shield machine, it is mainly by cutterhead, main driving, shield body, propulsion device, hinged dress
It sets, duct piece assembling machine, screw conveyor and rear mating trolley form.Wherein, duct piece assembling machine is mainly used for assembled, trimmed tunnel
Section of jurisdiction, movement needed for being completed by HYDRAULIC CONTROL SYSTEM oil cylinder driving executing agency mounted thereto.Since tunnel duct piece needs
360 ° of circumference lining cutting, it is desirable that duct piece assembling machine, which can be realized, to be rotated both clockwise and counterclockwise respectively more than 200 °.Correspondingly, assembled
Oil cylinder, control valve group above machine etc. can also be rotated with assembling machine.Since general hydraulic reservoir is open type oil tank
Do not have airtightness, there is no oil liquid compensation function, is unable to satisfy the requirement that hydraulic system is integrally rotated with assembling machine.
Currently, the design of assembled machine hydraulic system is that system dynamic part is separated arrangement with assembling machine, by hydraulic
Hose by the power section and assembling machine outside assembling machine system control valve group and oil cylinder connect.To meet hydraulic hose
Assembling machine rotates demand, needs additionally to increase on assembling machine revolution towing chain mechanism or revolution pulley mechanism.This design pair
The requirement of hydraulic hose is very high, and in actual application, assembling machine revolution often occur leads to hydraulic hose fatigue damage,
So that assembling machine system can not work normally, engineering construction progress is seriously affected.
Summary of the invention
The object of the present invention is to provide a kind of assembling machine sealed reservoir system, integral installation can be with assembly on assembling machine
Machine rotates to cancel assembling machine revolution drag chain and revolution pulley mechanism together, reduces the complexity of assembling machine mechanism, solves
Determined assembled machine hydraulic system can not problem and hydraulic hose of the integral installation in assembling machine structure due to assembling machine turn-around machine
Fatigue damage problem caused by structure.
In order to solve the above technical problem, the present invention provides a kind of assembling machine sealed reservoir system, including oil cylinder, oil pump,
The oiler of fuel tank, control valve group, overflow valve group and accumulator, the fuel tank and oil pump connects, the oil outlet of the oil pump with
The P mouth of control valve group connects, and the A mouth of the control valve group is connect with the rodless cavity of oil cylinder, the rod chamber of the oil cylinder and control
The B mouth of valve group connects, the connection of the T mouth and fuel tank of the control valve group；The hydraulic pump and control valve group P mouthfuls of connecting line
On be disposed with the first ball valve, check valve and first filter；On the fuel tank and control valve group T mouthfuls of connecting line successively
It is provided with the second ball valve and the second filter；The Single port of the overflow valve group is connect with T mouthfuls of control valve group, another port and control
The P mouth of valve group processed connects；The oil outlet of the accumulator is connect with fuel tank, is arranged on the connecting line of the accumulator and fuel tank
There is third ball valve.
Preferably, the assembling machine sealed reservoir system further includes injection system, and the injection system includes the
Four ball valves, safety valve, pressure gauge and quick-release connector, the 4th ball valve, safety valve, pressure gauge and quick-release connector respectively with fuel tank
Connection is provided with the 5th ball valve on the connecting line of the quick-release connector and fuel tank, and the is provided on one end of the safety valve
Six ball valves.
Preferably, the assembling machine sealed reservoir system further includes hydraulic hose, and the hydraulic hose is set respectively
It is placed on the connecting line of oil cylinder, oil pump, fuel tank, control valve group, overflow valve group and accumulator.
Preferably, the hydraulic pump includes motor, bell-jar, shaft coupling and oil pump, and the motor passes through flange
It is fixed with one end of bell-jar, the other end of the bell-jar is fixed by flange and oil pump；The shaft and shaft coupling of the motor
One end of device connects, and the other end of the shaft coupling is connect with oil pump.
Preferably, the fuel tank internal is provided with fuel sucking pipe, and the oil inlet of the fuel sucking pipe and hydraulic pump connects,
Oil absorption filter is provided on the fuel sucking pipe.
Assembling machine sealed reservoir system of the present invention, when oil cylinder stretches out, working fluid in fuel tank by hydraulic pump,
First ball valve, check valve, first filter and control valve group enter the rodless cavity of oil cylinder.Oil liquid in cylinder rod chamber passes through
Control valve group, the second filter, the second ball valve return to fuel tank.Since there are difference in volume for the rodless cavity and rod chamber of oil cylinder, so
The oil liquid volume for entering oil cylinder rodless cavity in fuel tank is greater than the oil liquid volume that sealed reservoir is returned to from cylinder rod chamber.At this point, storing
Oil liquid inside energy device can be added in fuel tank by third ball valve, guarantee to be full of oil liquid in fuel tank.
When oil cylinder retracts, working fluid in fuel tank by hydraulic pump, the first ball valve, check valve, first filter and
Control valve group enters the rod chamber of oil cylinder.Oil liquid in oil cylinder rodless cavity passes through control valve group, the second filter, the second ball valve
Return to fuel tank.Hold at this point, the oil liquid volume for entering cylinder rod chamber in fuel tank is less than from the oil liquid that oil cylinder rodless cavity returns to fuel tank
Product.At this point, the oil liquid inside fuel tank can be entered in accumulator by third ball valve.
As it can be seen that oil tank system of the invention can be realized the functional requirement of assembling machine system, also, due to its have it is close
Closing property and oil liquid compensation function are achieved assembled machine hydraulic system with the demand that assembling machine rotates.
The present invention provides a kind of assembling machine sealed reservoir system, has the advantages that
Oil tank system of the invention uses sealed reservoir, and there is whole system airtightness not contact with atmosphere, and be arranged
There is accumulator to connect with fuel tank, can compensate for the difference in volume bring oil liquid volume change due to cylinder rod chamber and rodless cavity, make
Fuel tank is full of always oil liquid in working condition.Oil liquid liquid level when fuel tank is rotated with assembling machine in fuel tank will not generate variation with
Exempt from system there is a phenomenon where excessive for shortage of oil and fuel tank oil liquid, system is caused to can not work normally.The present invention solves system
Integral-rotation problem is mainly used in shield machine assembling machine system and other needs the integrally rotated operating condition of hydraulic system
Under.Additionally due to oil tank system of the invention have airtightness and flexibility, may be mounted in assembling machine structure, it can be achieved that
It is rotated together with assembling machine.
Detailed description of the invention
Fig. 1 is a kind of connection schematic diagram of assembling machine sealed reservoir system provided in an embodiment of the present invention.
Appended drawing reference: 1, fuel tank；2, control valve group；3, oil cylinder；4, overflow valve group；5, accumulator；6, first filter；7,
Second filter；8, check valve；9, safety valve；10, quick-release connector；11, oil absorption filter；12, motor；13, bell-jar；14,
Shaft coupling；15, oil pump；16, hydraulic hose；17, pressure gauge；18, the first ball valve；19, the second ball valve；20, third ball valve；21,
4th ball valve；22, the 5th ball valve；23, the 6th ball valve.
Specific embodiment
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 description, 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, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, a kind of assembling machine sealed reservoir system of the preferred embodiment of the present invention, including oil cylinder 3, oil pump 15, oil
Case 1, control valve group 2, overflow valve group 4 and accumulator 5, the fuel tank 1 are connect with the oiler of oil pump 15, and the oil pump 15 goes out
Hydraulic fluid port is connect with the P of control valve group 2 mouth, and the A mouth of the control valve group 2 is connect with the rodless cavity of oil cylinder 3, and the oil cylinder 3 has
Rod cavity is connect with the B of control valve group 2 mouth, the connection of the T mouth and fuel tank 1 of the control valve group 2；The hydraulic pump and control valve group
The first ball valve 18, check valve 8 and first filter 6 are disposed on 2P mouthfuls of connecting line；The fuel tank 1 and control valve group
The second ball valve 19 and the second filter 7 are disposed on 2T mouthfuls of connecting line；The Single port of the overflow valve group 4 and control
2T mouthfuls of valve group connections, another port is connect with the P of control valve group 2 mouth；The oil outlet of the accumulator 5 is connect with fuel tank 1, described
Third ball valve 20 is provided on the connecting line of accumulator 5 and fuel tank 1.
Preferably, the assembling machine sealed reservoir system further includes injection system, and the injection system includes the 4th ball valve
21, safety valve 9, pressure gauge 17 and quick-release connector 10, the 4th ball valve 21, safety valve 9, pressure gauge 17 and quick-release connector 10 divide
It is not connect with fuel tank 1, is provided with the 5th ball valve 22 on the quick-release connector 10 and the connecting line of fuel tank 1, the safety valve 9
The 6th ball valve 23 is provided on one end.
Specifically, opening the 5th ball valve 22, third ball valve 20 and the 4th ball valve 21 when injecting working fluid to fuel tank 1, close
Close the first ball valve 18, the second ball valve 19 and the 6th ball valve 23.Quick-release connector 10 connects external fueller, the oiling into fuel tank 1,
When the 4th ball valve 21 of ball valve, which begins with oil liquid, to be flowed continually out, 21 ball valve of the 4th ball valve is closed, the oiling into fuel tank 1 is continued, when
When 1 inner fluid pressure of fuel tank reaches requirement pressure value, oiling is finished, and is full of oil liquid in fuel tank 1 at this time.
Preferably, the assembling machine sealed reservoir system further includes hydraulic hose 16, and the hydraulic hose 16 is respectively set
In on the connecting line of oil cylinder 3, oil pump 15, fuel tank 1, control valve group 2, overflow valve group 4 and accumulator 5.
Preferably, 16 sebific duct of hydraulic hose selects special synthetic rubber cooperation to be made, and has excellent oil resistant, resistance to
Heat, ageing-resistant performance.
Specifically, the hydraulic tube tube body is tightly combined, using softness, deforms under stress small, there is excellent resistance to song
Around property and fatigue durability, bearing capacity is high, and pulse behaviors are superior.
Preferably, the hydraulic pump includes motor 12, bell-jar 13, shaft coupling 14 and oil pump 15, and the motor 12 passes through
One end of flange and bell-jar 13 is fixed, and the other end of the bell-jar 13 is fixed by flange and oil pump 15；The motor 12
Shaft connect with one end of shaft coupling 14, the other end of the shaft coupling 14 is connect with oil pump 15.
Preferably, the fuel tank 1 is internally provided with fuel sucking pipe, and the oil inlet connection of the fuel sucking pipe and hydraulic pump is described
Oil absorption filter 11 is provided on fuel sucking pipe.
Assembling machine sealed reservoir system of the present invention, when oil cylinder 3 stretches out, the working fluid in fuel tank 1 passes through hydraulic
Pump, the first ball valve 18, check valve 8, first filter 6 and control valve group 2 enter the rodless cavity of oil cylinder 3.In 3 rod chamber of oil cylinder
Oil liquid fuel tank 1 is returned to by control valve group 2, the second filter 7, the second ball valve 19.Due to the rodless cavity and rod chamber of oil cylinder 3
There are difference in volume, so the oil liquid volume for entering 3 rodless cavity of oil cylinder in fuel tank 1, which is greater than from 3 rod chamber of oil cylinder, returns to sealed reservoir 1
Oil liquid volume.At this point, the oil liquid of 5 the inside of accumulator can be added in fuel tank 1 by third ball valve 20, guarantee to fill in fuel tank 1
Full oil liquid.
When oil cylinder 3 retracts, the working fluid in fuel tank 1 is filtered by hydraulic pump, the first ball valve 18, check valve 8, first
Device 6 and control valve group 2 enter the rod chamber of oil cylinder 3.Oil liquid in 3 rodless cavity of oil cylinder passes through control valve group 2, the second filter
7, the second ball valve 19 returns to fuel tank 1.At this point, the oil liquid volume for entering 3 rod chamber of oil cylinder in fuel tank 1 is less than from 3 rodless cavity of oil cylinder
Return to the oil liquid volume of fuel tank 1.At this point, the oil liquid of 1 the inside of fuel tank can be entered in accumulator 5 by third ball valve 20.
As it can be seen that oil tank system of the invention can be realized the functional requirement of assembling machine system, also, due to its have it is close
Closing property and oil liquid compensation function are achieved assembled machine hydraulic system with the demand that assembling machine rotates.
The oil tank system of the present embodiment uses sealed reservoir 1, and there is whole system airtightness not contact with atmosphere, and set
It is equipped with accumulator 5 to connect with fuel tank 1, can compensate for becoming due to the difference in volume bring oil liquid capacity of 3 rod chamber of oil cylinder and rodless cavity
Change, fuel tank 1 is made to be full of oil liquid always in working condition.Oil liquid liquid level when fuel tank 1 is rotated with assembling machine in fuel tank 1 will not produce
Changing is in order to avoid system there is a phenomenon where excessive for shortage of oil and 1 oil liquid of fuel tank, causes system can not work normally.Solution of the present invention
System of having determined rotates integrally problem, is mainly used in shield machine assembling machine system and other hydraulic system is needed to rotate integrally
Operating condition under.Additionally due to oil tank system of the invention has airtightness and flexibility, may be mounted in assembling machine structure,
It can be achieved to rotate together with assembling machine.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and replacement can also be made, these are improved and replacement
Also it should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of assembling machine sealed reservoir system, it is characterised in that: including oil cylinder, oil pump, fuel tank, control valve group, overflow valve group
And accumulator, the oiler connection of the fuel tank and oil pump, the oil outlet of the oil pump and the P mouth of control valve group connect, described
The A mouth of control valve group is connect with the rodless cavity of oil cylinder, and the rod chamber of the oil cylinder and the B mouth of control valve group connect, the control
The connection of the T mouth and fuel tank of valve group；Be disposed on the hydraulic pump and control valve group P mouthfuls of connecting line the first ball valve,
Check valve and first filter；The second ball valve and second are disposed on the fuel tank and control valve group T mouthfuls of connecting line
Filter；The Single port of the overflow valve group is connect with T mouthfuls of control valve group, the P mouth connection of another port and control valve group；It is described
The oil outlet of accumulator is connect with fuel tank, and third ball valve is provided on the connecting line of the accumulator and fuel tank.
2. assembling machine sealed reservoir system as described in claim 1, which is characterized in that it further include injection system, the oiling
System includes the 4th ball valve, safety valve, pressure gauge and quick-release connector, the 4th ball valve, safety valve, pressure gauge and quick-release connector
It is connect respectively with fuel tank, the 5th ball valve, one end of the safety valve is provided on the connecting line of the quick-release connector and fuel tank
On be provided with the 6th ball valve.
3. assembling machine sealed reservoir system as described in claim 1, which is characterized in that it further include hydraulic hose, it is described hydraulic
Hose is respectively arranged on the connecting line of oil cylinder, oil pump, fuel tank, control valve group, overflow valve group and accumulator.
4. assembling machine sealed reservoir system as described in claim 1, which is characterized in that the hydraulic pump includes motor, bell
Cover, shaft coupling and oil pump, the motor are fixed by one end of flange and bell-jar, and the other end of the bell-jar passes through flange
It is fixed with oil pump；The shaft of the motor and one end of shaft coupling connect, and the other end of the shaft coupling is connect with oil pump.
5. assembling machine sealed reservoir system as described in claim 1, which is characterized in that the fuel tank internal is provided with oil suction
The oil inlet of pipe, the fuel sucking pipe and hydraulic pump connects, and is provided with oil absorption filter on the fuel sucking pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811133661.6A CN109114049A (en) | 2018-09-27 | 2018-09-27 | A kind of assembling machine sealed reservoir system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811133661.6A CN109114049A (en) | 2018-09-27 | 2018-09-27 | A kind of assembling machine sealed reservoir system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109114049A true CN109114049A (en) | 2019-01-01 |
Family
ID=64856646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811133661.6A Pending CN109114049A (en) | 2018-09-27 | 2018-09-27 | A kind of assembling machine sealed reservoir system |
Country Status (1)
| Country | Link |
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| CN (1) | CN109114049A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081032A (en) * | 2019-06-05 | 2019-08-02 | 中国铁建重工集团股份有限公司 | Engineering machine and hydraulic power mechanism thereof |
| CN110219837A (en) * | 2019-07-10 | 2019-09-10 | 无锡华瀚能源装备科技有限公司 | A kind of closed type hydraulic system for oil cylinder driving |
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| US3935882A (en) * | 1974-02-19 | 1976-02-03 | Caterpillar Tractor Co. | Hydraulic tank reservoir pressure and vacuum stabilizer system |
| US4052852A (en) * | 1976-11-22 | 1977-10-11 | Caterpillar Tractor Co. | Constant pressure sealed fluid storage tank for hydraulic systems |
| JP2000329105A (en) * | 1999-05-17 | 2000-11-28 | Atec:Kk | Hydraulic cylinder driving device |
| CN201689020U (en) * | 2009-08-10 | 2010-12-29 | 山东交通学院 | Totally closed pressure oil tank with variable volume used in pavement accelerated loading experimental apparatus |
| CN102168540A (en) * | 2011-04-01 | 2011-08-31 | 孙茂意 | Hydraulic pumping unit with pressure compensation device |
| CN204704169U (en) * | 2015-04-28 | 2015-10-14 | 北京首钢国际工程技术有限公司 | A kind of hydraulic system air sac type constant voltage sealed reservoir |
| CN106351887A (en) * | 2016-10-09 | 2017-01-25 | 江苏万达丰重工机械有限公司 | Hydraulic driving device |
| CN107228097A (en) * | 2017-07-06 | 2017-10-03 | 中铁工程装备集团有限公司 | A kind of closed booster station of nonstatic and its control method |
| CN108331805A (en) * | 2018-03-21 | 2018-07-27 | 江苏恒立液压科技有限公司 | Closed hydraulic system and its adjustment method |
| CN208918935U (en) * | 2018-09-27 | 2019-05-31 | 中船重型装备有限公司 | A kind of assembly sump control system |
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2018
- 2018-09-27 CN CN201811133661.6A patent/CN109114049A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3935882A (en) * | 1974-02-19 | 1976-02-03 | Caterpillar Tractor Co. | Hydraulic tank reservoir pressure and vacuum stabilizer system |
| US4052852A (en) * | 1976-11-22 | 1977-10-11 | Caterpillar Tractor Co. | Constant pressure sealed fluid storage tank for hydraulic systems |
| JP2000329105A (en) * | 1999-05-17 | 2000-11-28 | Atec:Kk | Hydraulic cylinder driving device |
| CN201689020U (en) * | 2009-08-10 | 2010-12-29 | 山东交通学院 | Totally closed pressure oil tank with variable volume used in pavement accelerated loading experimental apparatus |
| CN102168540A (en) * | 2011-04-01 | 2011-08-31 | 孙茂意 | Hydraulic pumping unit with pressure compensation device |
| CN204704169U (en) * | 2015-04-28 | 2015-10-14 | 北京首钢国际工程技术有限公司 | A kind of hydraulic system air sac type constant voltage sealed reservoir |
| CN106351887A (en) * | 2016-10-09 | 2017-01-25 | 江苏万达丰重工机械有限公司 | Hydraulic driving device |
| CN107228097A (en) * | 2017-07-06 | 2017-10-03 | 中铁工程装备集团有限公司 | A kind of closed booster station of nonstatic and its control method |
| CN108331805A (en) * | 2018-03-21 | 2018-07-27 | 江苏恒立液压科技有限公司 | Closed hydraulic system and its adjustment method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081032A (en) * | 2019-06-05 | 2019-08-02 | 中国铁建重工集团股份有限公司 | Engineering machine and hydraulic power mechanism thereof |
| CN110219837A (en) * | 2019-07-10 | 2019-09-10 | 无锡华瀚能源装备科技有限公司 | A kind of closed type hydraulic system for oil cylinder driving |
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Application publication date: 20190101 |