CN109226113A - A kind of hydraulic pipeline rinses oil supply gallery and its flow control methods - Google Patents
A kind of hydraulic pipeline rinses oil supply gallery and its flow control methods Download PDFInfo
- Publication number
- CN109226113A CN109226113A CN201811226981.6A CN201811226981A CN109226113A CN 109226113 A CN109226113 A CN 109226113A CN 201811226981 A CN201811226981 A CN 201811226981A CN 109226113 A CN109226113 A CN 109226113A
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- Prior art keywords
- oil
- overflow
- valve member
- overflow valve
- control valve
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Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003921 oil Substances 0.000 claims abstract description 116
- 239000002828 fuel tank Substances 0.000 claims abstract description 29
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 26
- 239000000446 fuel Substances 0.000 claims description 19
- 239000002243 precursor Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 description 13
- 239000007788 liquid Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 239000000356 contaminant Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000002262 irrigation Effects 0.000 description 2
- 238000003973 irrigation Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of hydraulic pipelines to rinse oil supply gallery and its flow control methods, belong to hydraulic pipeline and rinses field, a kind of hydraulic pipeline disclosed by the invention rinses oil supply gallery and its flow control methods, and it includes fuel tank that hydraulic pipeline, which rinses oil supply gallery, is provided with antiwear hydraulic oil in fuel tank；It further include two oil pump devices, the first control valve group, the second control valve group and oil cylinders out.Each oil pump device be respectively provided with there are two pump oil pipeline, four pump oil pipelines are separately connected the first overflow valve member, the second overflow valve member, third overflow valve member, the 4th overflow valve member, and the unlatching by controlling different channels, which can control, to be formed the hydraulic oil of various flow rate and a variety of force combinations and be rinsed to pipeline.
Description
Technical field
Field is rinsed the present invention relates to hydraulic pipeline more particularly to a kind of hydraulic pipeline rinses oil supply gallery and its flow control
Method processed.
Background technique
In industrial equipment hydraulic system and oil lubrication system construction, after system pipeline installation, it is necessary to be followed by oil
Ring rinses, and is allowed to inner wall of the pipe cleanliness and reaches design code grade just to come into operation.In hydraulic system and oil lubrication
In system construction, oil-piping circulation flushing is one of important procedure.It is time-consuming, laborious, always by the concern of technical staff.
" metallurgical machinery is hydraulic, lubrication and pneumatic plant engineering code for erection and inspection GB50387-2006 for existing national standards
The defined hydraulic and lubricating pipe inner cavity class of pollution, using " hydraulic drive oil liquid solid particle pollution Grade numbers "
The tertiary granule concentration grade code of GB/T14039-2002 standard.Classify by particle size, carries out the division of grain count grain
The standard of grade.In actual cycle flushing, the filter device of which kind of precision no matter is used, is impossible to through one cycle or several
Secondary circulation just filters contaminant particle net.And need by circulation many times, gradually these pollution particles are filtered off, are subtracted
It is few, until reaching prescribed requirement.Therefore, it can be said that the process of circulation flushing, is the process to circulation lube purification.And for opening
The flushing process of formula circulation flushing oil supply gallery is then by the process of the flushing lube purification of a fuel tank, this is one relatively unrestrained
The long period.
Theoretically liquid flows in pipeline, as long as reynolds value reaches 2300 (in turbulent condition), so that it may will be in pipe
The contaminant particle adhered on wall removes.And in fact, these are attached to the contaminant particle in inner wall of the pipe, with inner wall of the pipe
There is certain adhesion strength, it is necessary to could remove under certain scouring force effect.So improving irrigation flow rate (usual empirical value
Calculating irrigation flow rate should be even higher up to 5~10m/s) be also improve flush efficiency one of key point.
The flushing of different pipelines is needed to carry out using different flows and different pressure, existing hydraulic pipeline
Flushing device is not very convenient to the control of flow.
Summary of the invention
In order to overcome the drawbacks of the prior art, technical problem to be solved by the present invention lies in propose a kind of hydraulic pipeline punching
Oil supply gallery and its flow control methods are washed, by being applied in combination for a variety of overflow valves, different channels is set, difference is passed through
The unlatching in channel allows to preferably adjust the flow and pressure of flushing.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of hydraulic pipeline provided by the invention rinses oil supply gallery, including fuel tank, is provided with antiwear hydraulic oil in fuel tank；
It further include two oil pump devices, the first control valve group, the second control valve group and oil cylinders out；Each oil pump device
Pump oil pipeline there are two being respectively provided with, the pump of the first control valve group, the second control valve group oil pump device with two respectively
Oil-piping connection, the first control valve group are provided with the first overflow valve member and connect with a pump oil pipeline, the first control valve group
It is additionally provided with the second overflow valve member to connect with another pump oil pipeline, the first control valve group is provided with the first flowline and goes out
Oil cylinder connection.
Second control valve group is provided with third overflow valve member and connect with a pump oil pipeline, and the second control valve group is also set
It is equipped with the 4th overflow valve member to connect with another pump oil pipeline, the second control valve group is provided with the second flowline and oil cylinder out
Connection.
Oil cylinder is provided with two fuel-displaced ports out, is provided with high-pressure ball valve on fuel-displaced port.
The present invention preferably technical solution is that the first overflow valve member and third overflow valve member are electromagnetic relief valve, the
One overflow valve member and third overflow valve member are provided with overflow pipe and connect with fuel tank.
The present invention preferably technical solution is that the second overflow valve member is made of proportional pressure control valve and precursor overflow valve；Than
One end of example overflow valve and the guide end of precursor overflow valve connect, and the effluent head of proportional pressure control valve and precursor overflow valve passes through excessive
Flow tube road is connect with fuel tank.
The present invention preferably technical solution is that the 4th overflow valve member is by solenoid directional control valve, No.1 overflow valve and No. two
Overflow valve composition, two ports of solenoid directional control valve are connect with two overflow valves respectively, solenoid directional control valve and two overflows
The effluent head of valve passes through overflow pipe and connect with fuel tank.
The present invention preferably technical solution is, the first overflow valve member, the second overflow valve member, third overflow valve member, the 4th
The oil outlet of overflow valve member is provided with check valve and pressure detector, and pressure detector is located at the front end of check valve.
The present invention preferably technical solution is, is provided with high-pressure filter on pump oil pipeline.
The present invention preferably technical solution is that oil pump device includes motor, duplex gear pump and two fuel feeding
It manages, is provided with butterfly valve on two fuel feed pumps；
One end of two fuel feed pumps is connect with fuel tank, and the other end of two fuel feed pumps connects with duplex gear pump
It connects, the power output end of motor is connect with duplex gear pump, and duplex gear pump is connect with traffic channel and pressure channel.
A kind of hydraulic pipeline rinses the flow control methods of oil supply gallery, comprising the following steps:
A, the oil pump device connecting with the first control valve group or the oil pump device connecting with the second control valve group are selected
Either one or two of open or two oil pump devices open simultaneously；
B, when the oil pump device connecting with the first control valve group is opened, the first overflow valve member or the second overflow valve are selected
The unlatching of either one or two of part or the first overflow valve member and the second overflow valve member are opened simultaneously；
When the oil pump device connecting with the second control valve group is opened, third overflow valve member or the 4th overflow valve member are selected
Either one or two of open or third overflow valve member and the 4th overflow valve member are opened simultaneously.
The present invention preferably technical solution is, in step B, when the unlatching of third overflow valve, select No.1 overflow valve or
Either one or two of No. two overflow valves are opened.
The present invention preferably technical solution is, in step B, it is continuous that the second overflow valve member by automatically controlled mode controls pressure
Variation.
The invention has the benefit that
A kind of hydraulic pipeline provided by the invention rinses oil supply gallery and its flow control methods, is filled by two groups of oil pumps
It sets and the combination settings of the first overflow valve member, the second overflow valve member, third overflow valve member, the 4th overflow valve member, can control
The hydraulic oil for forming various flow rate and a variety of force combinations is rinsed pipeline.
Detailed description of the invention
Fig. 1 is the overall structure diagram provided in the specific embodiment of the invention；
Fig. 2 is the schematic diagram of the first control valve group provided in the specific embodiment of the invention；
Fig. 3 is the structural schematic diagram of the second control valve group provided in the specific embodiment of the invention；
In figure:
1, oil pump device；2, the first control valve group；3, the second control valve group；4, go out oil cylinder；5, overflow pipe；11,
Motor；12, duplex gear pump；13, fuel feed pump；14, butterfly valve；15, pump oil pipeline；16, high-pressure filter；21, the first flowline
Road；22, the second overflow valve member；221, precursor overflow valve；222, proportional pressure control valve；23, the first overflow valve member；24, pressure detecting
Device；25, check valve；31, the second flowline；32, third overflow valve member；33, the 4th overflow valve member；331, No.1 overflow valve；
332, No. two overflow valves；333, solenoid directional control valve；41, fuel-displaced port；42, high-pressure ball valve.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
Embodiment one
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of hydraulic pipeline provided in the present embodiment rinses oil supply gallery, including fuel tank,
Antiwear hydraulic oil is provided in fuel tank；Further include two oil pump device 1, the first control valve group 2, the second control valve group 3,
And oil cylinder 4 out.Each oil pump device 1 be respectively provided with there are two pump oil pipeline 15, the first control valve group 2, second control
The pump oil pipeline 15 of the oil pump device 1 with two respectively of valve module 3 is connect, and the first control valve group 2 is provided with the first overflow valve
Part 23 is connect with a pump oil pipeline 15, and the first control valve group 2 is additionally provided with the second overflow valve member 22 and another pump oil pipe
Road 15 connects, and the first control valve group 2 is provided with the first flowline 21 and connect with oil cylinder 4 out.It is respectively provided on pump oil pipeline 15
There is high-pressure filter 16, the impurity in hydraulic oil can be filtered.Oil pump device 1 is by two pump oil pipelines 15 by liquid
Pressure oil is transported in the first control valve group 2, and according to the unlatching situation of valve in the first control valve group 2, hydraulic oil can be with not
Same flow and pressure is input to out in oil cylinder 4 from the first flowline 21.
As shown in Fig. 2, further, the first overflow valve member 23 is the electromagnetic relief valve of DBW908 type, pass through automatically controlled side
Formula controls the opening and closing of the first overflow valve, so that electromagnetic relief valve can be with steady pressure in 4MPa or so, the first overflow valve
Part 23 is provided with overflow pipe 5 and connect with fuel tank.The hydraulic oil of spilling flows back to fuel tank by overflow pipe 5 again.
As shown in figure 3, further, the second overflow valve member 22 by DBEIX-1X model proportional pressure control valve 222 and DBW30
The precursor overflow valve 221 of model forms；One end of proportional pressure control valve 222 is connect with the guide end of precursor overflow valve 221, passes through tune
The pressure of the adjustable hydraulic oil of proportional pressure control valve 222 is saved, while the setting of precursor overflow valve 221 can make flow bigger,
The effluent head of proportional pressure control valve 222 and precursor overflow valve 221 passes through overflow pipe 5 and connect with fuel tank.What is overflowed is hydraulic
Oil is conveyed in oil return box by overflow pipe 5.
First overflow valve member 23, the second overflow valve member 22 oil outlet be provided with 25 and of check valve of model S30P1
Pressure detector 24, pressure detector 24 are located at the front end of check valve 25, and pressure detector 24 uses the pressure of model YN100
Table.Check valve 25 can be very good that oil liquid is avoided to flow back, while being provided with pressure detector 24 and can be clearly seen that from fuel-displaced
The pressure of the hydraulic oil of pipeline output is how many.
As shown in Figure 1, oil pump device 1 includes motor 11, duplex gear pump 12 and two fuel feed pumps 13, motor 11
Using YE2-250M model, butterfly valve 14 is provided on two fuel feed pumps 13；Butterfly valve 14 control hydraulic oil slave fuel tank to tooth
The channel of wheel pump.One end of two fuel feed pumps 13 is connect with fuel tank, and the other end of two fuel feed pumps 13 is and duplex-gear
Wheel pump 12 connects, and the power output end of motor 11 is connect with duplex gear pump 12, duplex gear pump 12 and traffic channel and pressure
Channel connection.Hydraulic oil is sucked out in the pump oil pipeline 15 for being then pressed into two duplex gear pump 12 from fuel feed pump 13.
In the present embodiment, the oil pump device 1 connecting with the first control valve group 2 is only opened, by opening the first overflow
Valve can export the hydraulic oil that flushing pressure is 4MPa in the first flowline 21；The first overflow valve is closed, the second overflow is opened
Valve can obtain the flushing pressure of the pressure adjustable of 0-8MPa by adjusting proportional pressure control valve 222；The first overflow is opened simultaneously
Valve and the second overflow valve can make the flushing pressure of hydraulic oil become between 0-4MPa by adjusting proportional pressure control valve 222
Change.
Embodiment two
The present embodiment is different from embodiment one and is to open the oil pump device 1 connecting with the second control valve group 3.
A kind of hydraulic pipeline provided in the present embodiment rinses oil supply gallery, including fuel tank, is provided with wear-resistant liquid in fuel tank
Pressure oil；It further include two oil pump devices 1, the first control valve group 2, the second control valve group 3 and oil cylinder 4 out.Each
Oil pump device 1 be respectively provided with there are two pump oil pipeline 15, the first control valve group 2, the second control valve group 3 respectively with two
The pump oil pipeline 15 of oil pump device 1 connects, and the second control valve group 3 is provided with third overflow valve member 32 and a pump oil pipeline 15
Connection, the second control valve group 3 are additionally provided with the 4th overflow valve member 33 and connect with another pump oil pipeline 15, the second control valve group
Part 3 is provided with the second flowline 31 and connect with oil cylinder 4 out.It is provided with high-pressure filter 16 on pump oil pipeline 15, can incite somebody to action
Impurity in hydraulic oil is filtered.Hydraulic oil is transported to the second control valve by two pump oil pipelines 15 by oil pump device 1
In component 3, according to the unlatching situation of valve in the second control valve group 3, hydraulic oil can be with different flow and pressure from second
Flowline 31 is input to out in oil cylinder 4.
As shown in Figure 1, the fuel-displaced port 41 there are two the settings of oil cylinder 4 out, is provided with high-pressure ball valve 42 on fuel-displaced port 41.
Hydraulic oil converges to out in oil cylinder 4 from flowline, and the pipeline for needing to rinse in the connection of fuel-displaced port 41 opens high-pressure ball valve
42, hydraulic oil, which can enter, to be needed to be cleaned in the pipeline rinsed.
As shown in figure 3, further, third overflow valve member 32 is the electromagnetic relief valve of DBW908 type, pass through automatically controlled side
Formula controls the opening and closing of third overflow valve, so that electromagnetic relief valve can be with steady pressure in 4MPa or so, third overflow valve
Part 32 is provided with overflow pipe 5 and connect with fuel tank.The hydraulic oil of spilling flows back to fuel tank by overflow pipe 5 again.
Further, the 4th overflow valve member 33 is by solenoid directional control valve 333, No.1 overflow valve 331 and No. two overflow valves
332 compositions, two ports of solenoid directional control valve 333 connects with two overflow valves respectively, and solenoid directional control valve 333 and two s' is excessive
The effluent head of stream valve passes through overflow pipe 5 and connect with fuel tank.When No.1 overflow valve 331 and solenoid directional control valve 333 are opened, out
Oil-piping can export the stable flushing pressure of 8MPa；And when opening third overflow valve and No. two overflow valves 332, Ke Yi
Flowline exports the hydraulic oil of the stable big flow of 4MPa.
Third overflow valve member 32, the 4th overflow valve member 33 oil outlet be provided with 25 and of check valve of model S30P1
Pressure detector 24, pressure detector 24 are located at the front end of check valve 25, and pressure detector 24 uses the pressure of model YN100
Table.Check valve 25 can be very good that oil liquid is avoided to flow back, while being provided with pressure detector 24 and can be clearly seen that from fuel-displaced
The pressure of the hydraulic oil of pipeline output is how many.
As shown in Figure 1, further, oil pump device 1 includes motor 11, duplex gear pump 12 and two fuel feed pumps
13, motor 11 uses YE2-250M model, is provided with butterfly valve 14 on two fuel feed pumps 13；Butterfly valve 14 control hydraulic oil from
Fuel tank is to the channel of gear pump.One end of two fuel feed pumps 13 is connect with fuel tank, and the other end of two fuel feed pumps 13 is equal
It is connect with duplex gear pump 12, the power output end of motor 11 is connect with duplex gear pump 12, and duplex gear pump 12 and flow are logical
Road is connected with pressure channel.Hydraulic oil is then pressed into two pump oil pipelines 15 by duplex gear pump 12 from the suction of fuel feed pump 13
In.
The present invention is described with reference to the preferred embodiments, and those skilled in the art know, of the invention not departing from
In the case where spirit and scope, various changes or equivalence replacement can be carried out to these features and embodiment.The present invention is not by this
The limitation of specific embodiment disclosed in place, other embodiments fallen into claims hereof belong to protection of the present invention
Range.
Claims (10)
1. a kind of hydraulic pipeline rinses oil supply gallery, including fuel tank, antiwear hydraulic oil is provided in the fuel tank；Its feature exists
In: it further include two oil pump devices (1), the first control valve group (2), the second control valve group (3) and oil cylinder (4) out；
Two oil pump devices (1) are connect with first control valve group (2), the second control valve group (3) respectively, often
A oil pump device (1) be respectively provided with there are two pump oil pipeline (15), first control valve group (2) is provided with first
Overflow valve member (23) is connect with a pump oil pipeline (15), and first control valve group (2) is additionally provided with the second overflow valve member
(22) it is connect with another pump oil pipeline (15), first control valve group (2) is provided with the first flowline (21), described
First overflow valve member (23), the second overflow valve member (22) are connected by first flowline (21) and described oil cylinder (4) out
It connects；
Second control valve group (3) is provided with third overflow valve member (32), the 4th overflow valve member (33), the third overflow
Valve member (32) is connect with a pump oil pipeline (15), and the 4th overflow valve member (33) connect with another pump oil pipeline (15),
Second control valve group (3) is provided with the second flowline (31), the third overflow valve member (32), the 4th overflow valve member
(33) it is connect by second flowline (31) with oil cylinder (4) out；
Oil cylinder (4) out are provided with the fuel-displaced port (41) of at least one, are provided with smash on the fuel-displaced port (41)
Valve (42).
2. hydraulic pipeline according to claim 1 rinses oil supply gallery, it is characterised in that:
The first overflow valve member (23) and the third overflow valve member (32) are electromagnetic relief valve, the first overflow valve member
(23) it is provided with overflow pipe (5) with the third overflow valve member (32) and is connect with the fuel tank.
3. hydraulic pipeline according to claim 2 rinses oil supply gallery, it is characterised in that:
The second overflow valve member (22) is made of proportional pressure control valve (222) and precursor overflow valve (221)；The proportional pressure control valve
(222) one end is connect with the guide end of the precursor overflow valve (221), and the proportional pressure control valve (222) and the guide are overflow
The effluent head of stream valve (221) passes through overflow pipe (5) and connect with the fuel tank.
4. hydraulic pipeline according to claim 1 rinses oil supply gallery, it is characterised in that:
The 4th overflow valve member (33) is by solenoid directional control valve (333), No.1 overflow valve (331) and No. two overflow valves (332)
Composition, two ports of the solenoid directional control valve (333) are connect with two overflow valves respectively, the solenoid directional control valve (333)
Pass through overflow pipe (5) with the effluent head of two overflow valves to connect with the fuel tank.
5. hydraulic pipeline according to claim 3 rinses oil supply gallery, it is characterised in that:
The first overflow valve member (23), the second overflow valve member (22), third overflow valve member (32), the 4th overflow valve member (33)
Oil outlet is provided with check valve (25) and pressure detector (24), and the pressure detector (24) is located at the check valve (25)
Front end.
6. hydraulic pipeline according to claim 3 rinses oil supply gallery, it is characterised in that:
High-pressure filter (16) are provided on the pump oil pipeline (15).
7. hydraulic pipeline according to claim 1 rinses oil supply gallery, it is characterised in that:
The oil pump device (1) includes motor (11), duplex gear pump (12) and two fuel feed pumps (13), two institutes
It states and is provided with butterfly valve (14) on fuel feed pump (13)；
One end of two fuel feed pumps (13) is connect with the fuel tank, and the other end of two fuel feed pumps (13) is equal
It is connect with the duplex gear pump (12), the power output end of the motor (11) is connect with the duplex gear pump (12), institute
Duplex gear pump (12) is stated to connect with traffic channel and pressure channel.
8. a kind of flow control methods for rinsing oil supply gallery for the described in any item hydraulic pipelines of claim 1-7, special
Sign is:
The following steps are included:
A, the oil pump device (1) connecting with the first control valve group (2) or the oil pump connecting with the second control valve group (3) are selected
Either one or two of device (1) is opened or two oil pump devices (1) are opened simultaneously；
B, when the oil pump device (1) connecting with the first control valve group (2) is opened, the first overflow valve member (23) or second is selected
The unlatching of either one or two of overflow valve member (22) or the first overflow valve member (23) and the second overflow valve member (22) are opened simultaneously；
When the oil pump device (1) that connect with the second control valve group (3) is opened, selects third overflow valve member (32) or the overflow
The unlatching of either one or two of stream valve member (33) or third overflow valve member (32) and the 4th overflow valve member (33) are opened simultaneously.
9. the flow control methods that hydraulic pipeline according to claim 8 rinses oil supply gallery, which is characterized in that the step
In rapid B, when the unlatching of the third overflow valve, either one or two of No.1 overflow valve (331) or No. two overflow valves (332) is selected to open
It opens.
10. the flow control methods that hydraulic pipeline according to claim 8 rinses oil supply gallery, which is characterized in that described
In step B, the second overflow valve member (22) controls pressure change by automatically controlled mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811226981.6A CN109226113B (en) | 2018-10-22 | 2018-10-22 | Hydraulic pipeline flushing oil supply channel and flow control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811226981.6A CN109226113B (en) | 2018-10-22 | 2018-10-22 | Hydraulic pipeline flushing oil supply channel and flow control method thereof |
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| CN109226113A true CN109226113A (en) | 2019-01-18 |
| CN109226113B CN109226113B (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811226981.6A Active CN109226113B (en) | 2018-10-22 | 2018-10-22 | Hydraulic pipeline flushing oil supply channel and flow control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529442A (en) * | 2019-08-26 | 2019-12-03 | 哈尔滨工程大学 | Hydraulic system matched with piston machine fatigue test board |
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