CN109854570A - A kind of oil suction decompressor and oil suction depressurized system - Google Patents
A kind of oil suction decompressor and oil suction depressurized system Download PDFInfo
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- CN109854570A CN109854570A CN201910011577.5A CN201910011577A CN109854570A CN 109854570 A CN109854570 A CN 109854570A CN 201910011577 A CN201910011577 A CN 201910011577A CN 109854570 A CN109854570 A CN 109854570A
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Abstract
The present invention provides a kind of oil suction decompressor and oil suction depressurized systems, it is related to field of hydraulic equipment, the oil suction decompressor includes hydraulic motor, oil suction pump and fuel tank, hydraulic motor has the first oil inlet pipe and the first oil return pipe, first oil return pipe is connect with fuel tank, and hydraulic motor also has drain mast, and drain mast is connect with fuel tank, oil suction pump is arranged on drain mast and connect with the first oil return pipe, for the oil in drain mast to be pumped to fuel tank.By the way that oil suction pump is arranged on drain mast, the oil in drain mast can be accelerated to be pumped into fuel tank, so as to avoid draining pipe plug product, and then avoid and boost in hydraulic motor because drain tap blocks up product, the pressure inside hydraulic motor is reduced, Leakage is avoided.
Description
Technical field
The present invention relates to field of hydraulic equipment, in particular to a kind of oil suction decompressor and oil suction depressurized system.
Background technique
Hydraulic motor, also known as oil motor are mainly used in injection machine, ship, rise and raise machine, engineering machinery, building machine
Tool, coal mine machinery, mining machinery, metallurgical machinery, ship machinery, petrochemical industry, harbour machinery etc..
Drain line is usually provided on the shell of hydraulic motor, in the prior art, by the drain line of hydraulic motor
Longer, the resistance and pressure being easy to cause at the drain tap of hydraulic motor are larger, when being more than certain limit, will lead to hydraulic horse
The enclosure interior pressure increase reached, so that oil leakage phenomenon occurs in the oil sealing of motor.
In view of this, designing and manufacturing a kind of pressure that oil in drain mast can be pumped to fuel tank, reduce at drain tap
Power, so that the pressure reduction inside hydraulic motor, the oil suction decompressor for avoiding the occurrence of oil leakage phenomenon is just particularly important.
Summary of the invention
The purpose of the present invention is to provide a kind of oil suction decompressors, the oil in drain mast can be pumped to fuel tank, drop
Pressure at low drain tap, so that the pressure reduction inside hydraulic motor, avoids the occurrence of oil leakage phenomenon.
Another object of the present invention is to provide a kind of oil suction depressurized systems, the oil in drain mast can be pumped to oil
Case reduces the pressure at drain tap, so that the pressure reduction inside hydraulic motor, avoids the occurrence of oil leakage phenomenon.
The present invention is that it is realized by adopting the following technical scheme.
A kind of oil suction decompressor, including hydraulic motor, oil suction pump and fuel tank, hydraulic motor have the first oil inlet
Pipe and the first oil return pipe, the first oil return pipe are connect with fuel tank, and hydraulic motor also has drain mast, and drain mast is connect with fuel tank, are inhaled
Oil pump sending component is arranged on drain mast and connect with the first oil return pipe, for the oil in drain mast to be pumped to fuel tank.
Further, oil suction pump has the second oil inlet pipe and the second oil return pipe, one end of the second oil inlet pipe and the
The connection of one oil return pipe, the other end of the second oil inlet pipe are connect with oil suction pump, and one end of the second oil return pipe and oil suction pump
Component connection, the other end of the second oil return pipe are connect with drain mast.
Further, oil suction pump includes hydraulic-driven part and hydraulic pumping part, and hydraulic-driven part has oil inlet end
With oil outlet, the second oil inlet pipe is connect with oil inlet end, is used for hydraulic-driven part fuel feeding, and the second oil return pipe is connect with oil outlet,
Hydraulic-driven part and hydraulic pumping part are sequentially connected, and hydraulic pumping part is arranged on drain mast.
Further, drain mast is divided into draining section and conveying section by hydraulic pumping part, and draining section is connect with hydraulic motor, defeated
Section is sent to connect with fuel tank, the second oil return pipe is connect with draining section.
Further, hydraulic-driven part includes drive shell, impeller shaft and the first driving cog, and drive shell is arranged hydraulic
It pumps on part and there is oil inlet end and oil outlet, impeller shaft is rotatably arranged in drive shell, and the first driving cog is arranged in impeller
The end of axis can simultaneously be rotated synchronously with impeller shaft, and hydraulic pumping part and the first driving cog are sequentially connected, and be arranged in impeller shaft
There is impeller blade, for the impeller axis rotation under hydraulic-driven.
Further, hydraulic pumping part includes pumping valve body, pumping gear shaft and the second driving cog, and pumping valve body setting exists
It is connect on drain mast and with drive shell, pumping gear shaft is rotatably arranged in pumping valve body, and the setting of the second driving cog is pumping
The end of gear shaft is simultaneously sequentially connected with the first driving cog.
Further, hydraulic pumping part further includes pumping driven shaft, pumps and is provided with driving gear on gear shaft, pumping from
Driven gear is provided on moving axis, driving gear, which is meshed with driven gear and forms pump, inhales channel, for pumping in drain mast
Oil.
Further, solenoid valve is provided on the second oil inlet pipe.
Further, hydraulic motor includes motor body and motor shell, and motor body is accommodated in motor shell and has
There are oil inlet and oil return opening, oil inlet is connect with the first oil inlet pipe, and oil return opening is connect with the first oil return pipe, is arranged on motor shell
There is drain tap, drain tap is connect with drain mast, and drain mast is connected to the inside of motor shell.
A kind of oil suction depressurized system, including oil feed pump and oil suction decompressor, oil suction decompressor include hydraulic motor, inhale
Oil pump sending component and fuel tank, hydraulic motor have the first oil inlet pipe and the first oil return pipe, and the first oil return pipe is connect with fuel tank, hydraulic
Motor also has drain mast, and drain mast is connect with fuel tank, and oil suction pump is arranged on drain mast and connects with the first oil return pipe
It connects, for the oil in drain mast to be pumped to fuel tank.Oil feed pump is connect with the first oil inlet pipe.
The invention has the following advantages:
A kind of oil suction decompressor provided by the invention, hydraulic motor have the first oil inlet pipe and the first oil return pipe, the
One oil return pipe is connect with fuel tank, and hydraulic motor also has drain mast, and drain mast is connect with fuel tank, and the setting of oil suction pump is being let out
It is connect on oil pipe and with the first oil return pipe.By the way that oil suction pump is arranged on drain mast, the oil in drain mast can be added
Speed is pumped into fuel tank, so as to avoid draining pipe plug product, and then avoids and boosts in hydraulic motor because drain tap blocks up product, drops
Pressure inside low hydraulic motor, avoids Leakage.Compared to the prior art, a kind of oil suction decompression provided by the invention
Oil in drain mast is pumped to fuel tank using oil suction pump, can reduce the pressure inside hydraulic motor, avoid by device
There is oil leakage phenomenon.
A kind of oil suction decompressor provided in this embodiment, oil suction pump have the second oil inlet pipe and the second oil return
Pipe, one end of the second oil inlet pipe are connect with the first oil return pipe, and the other end of the second oil inlet pipe is connect with oil suction pump, and second
One end of oil return pipe is connect with oil suction pump, and the other end of the second oil return pipe is connect with drain mast.Pass through the second oil inlet pipe
Oil in first oil return pipe is introduced into oil suction pump, so that oil suction pump be driven to send the oil pump in drain mast
It avoids so as to be reused to the oil in the first oil return pipe to fuel tank and drives oil scavenge pump using external power source
Sending component has saved the energy.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram for the oil suction decompressor that first embodiment of the invention provides；
Fig. 2 is the attachment structure schematic diagram of oil suction pump in Fig. 1；
Fig. 3 is the attachment structure schematic diagram of hydraulic-driven part in Fig. 2；
Fig. 4 is the structural schematic diagram of hydraulic pumping part in Fig. 2；
Fig. 5 is the attachment structure schematic diagram of hydraulic-driven part and hydraulic pumping part in Fig. 2.
Icon: 100- oil suction decompressor；110- hydraulic motor；130- oil suction pump；The second oil inlet pipe of 131-；
The second oil return pipe of 133-；135- hydraulic-driven part；1351- drive shell；1353- impeller shaft；The first driving cog of 1355-；137-
Hydraulic pumping part；1371- pumps valve body；1373- pumps gear shaft；1375- pumps driven shaft；The second driving cog of 1377-；150-
Fuel tank；The first oil inlet pipe of 170-；The first oil return pipe of 180-；190- drain mast.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " center ", "upper", "vertical", "horizontal", "inner", "outside"
The orientation or positional relationship of equal instructions is to be based on the orientation or positional relationship shown in the drawings or when invention product uses is used
The orientation or positional relationship often put, is merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion is signified
Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the present invention
Limitation.In addition, term " first ", " second " etc. are only used for distinguishing description, it is not understood to indicate or imply relatively important
Property.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" connected ", " installation ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
With reference to the accompanying drawing, it elaborates to some embodiments of the present invention.In the absence of conflict, following
Feature in embodiment can be combined with each other.
First embodiment
Referring to Fig. 1, a kind of oil suction decompressor 100, including hydraulic motor 110, oil suction pumping group are present embodiments provided
Part 130 and fuel tank 150, hydraulic motor 110 have the first oil inlet pipe 170 and the first oil return pipe 180, the first oil return pipe 180 and oil
Case 150 connects, and hydraulic motor 110 also has drain mast 190, and drain mast 190 is connect with fuel tank 150, and oil suction pump 130 is set
It sets on drain mast 190 and is connect with the first oil return pipe 180, for the oil in drain mast 190 to be pumped to fuel tank 150.
In the present embodiment, the first oil inlet pipe 170 and the first oil return pipe 180 are arranged at the top of hydraulic motor 110, let out
Oil pipe 190 is arranged in the side of hydraulic motor 110 and is connected to the inside of hydraulic motor 110, so as to by hydraulic motor 110
Internal oil discharge.
It should be noted that the first oil inlet pipe 170 is connect with external oil feed pump, by oil feed pump to hydraulic motor 110
High pressure oil is provided, so that hydraulic motor 110 be driven to act, concrete principle does not describe excessively herein.
In the present embodiment, hydraulic motor 110 includes motor body and motor shell, and motor body is accommodated in motor shell
Interior and have oil inlet and oil return opening, oil inlet connect with the first oil inlet pipe 170, and oil return opening is connect with the first oil return pipe 180, horse
Drain tap is provided on up to shell, drain tap is connect with drain mast 190, and drain mast 190 is connected to the inside of motor shell.
In the present embodiment, there is sealing inner cavity, the oil accumulation inside motor shell is arranged by drain tap inside motor shell
Out, specifically, drain tap can be set in the bottom of motor shell, so as to further reach draining effect.
Referring to fig. 2 to Fig. 4, oil suction pump 130 has the second oil inlet pipe 131 and the second oil return pipe 133, the second oil inlet
One end of pipe 131 is connect with the first oil return pipe 180, and the other end of the second oil inlet pipe 131 is connect with oil suction pump 130, the
One end of two oil return pipes 133 is connect with oil suction pump 130, and the other end of the second oil return pipe 133 is connect with drain mast 190.
In other preferred embodiments of the invention, solenoid valve is provided on the second oil inlet pipe 131.Specifically, work as draining
When 190 tunnel of pipe distance is shorter, stifled product phenomenon will not occur in 190 tunnel of drain mast, it at this time can be by solenoid valve by the second oil inlet pipe
131 close, and original draining mode is still kept to carry out draining, when drain mast 190, which passes by long or generation, blocks up product phenomenon, lead to
It crosses solenoid valve and opens the second oil inlet pipe 131, so as to assist carrying out draining.
It should be noted that since the oil pressure in the first oil return pipe 180 is usually in 1MPa or more, and in drain mast 190
Oil pressure be usually in 0.5MPa hereinafter, therefore the first oil return pipe 180 in oil can pass through the second oil inlet pipe driven by pressure
131 enter oil suction pump 130, are flowed into drain mast 190 after driving oil suction pump 130 by the second oil return pipe 133,
The oil in the first oil return pipe 180 is driven here with pressure difference, to drive oil suction pump 130, is taken full advantage of existing
Pipeline, the oil in the first oil return pipe 180 can be reused, avoid utilize external power source driving oil suction pumping
Component 130, has saved the energy.
Oil suction pump 130 includes hydraulic-driven part 135 and hydraulic pumping part 137, and hydraulic-driven part 135 has oil inlet
End and oil outlet, the second oil inlet pipe 131 connects with oil inlet end, are used for 135 fuel feeding of hydraulic-driven part, the second oil return pipe 133 and
Oil outlet connection, hydraulic-driven part 135 and hydraulic pumping part 137 are sequentially connected, and hydraulic pumping part 137 is arranged in drain mast 190
On.
In the present embodiment, hydraulic pumping part 137 divides drain mast 190 for draining section and conveying section, draining section with it is hydraulic
Motor 110 connects, and conveying section is connect with fuel tank 150, and the second oil return pipe 133 is connect with draining section.
In other of the invention preferred embodiments, the second oil return pipe 133 is directly connect with fuel tank 150, can directly by
Oil is vented directly to fuel tank 150.
Hydraulic-driven part 135 includes drive shell 1351, impeller shaft 1353 and the first driving cog 1355, drive shell 1351
It is arranged on hydraulic pumping part 137 and there is oil inlet end and oil outlet, impeller shaft 1353 is rotatably arranged in drive shell 1351,
First driving cog 1355 is arranged in the end of impeller shaft 1353 and can rotate synchronously with impeller shaft 1353, hydraulic pumping part
137 and first driving cog 1355 be sequentially connected, impeller blade is provided in impeller shaft 1353, for the impeller under hydraulic-driven
Axis 1353 rotates.
Hydraulic pumping part 137 includes pumping valve body 1371, pumping gear shaft 1373, pumping driven shaft 1375 and the second transmission
Tooth 1377, pumping valve body 1371 are arranged on drain mast 190 and connect with drive shell 1351, and the pumping rotation of gear shaft 1373 is set
Set pumping valve body 1371 in, the second driving cog 1377 be arranged in pumping gear shaft 1373 end and with the first driving cog 1355
Transmission connection.It is provided with driving gear on pumping gear shaft 1373, pumps and is provided with driven gear, driving tooth on driven shaft 1375
Wheel, which is meshed with driven gear and forms pump, inhales channel, for pumping the oil in drain mast 190.
In the present embodiment, the size for pumping valve body 1371 is greater than the size of drain mast 190, and pumps the two of valve body 1371
End is provided with fuel feed hole and oil outlet, and offers pumping inner cavity, fuel feed hole and oil outlet point in the inside of pumping valve body 1371
It is not connect with draining section and conveying section, the oil inside hydraulic motor 110 can be delivered to pumping inner cavity by draining section, and
Conveying section is discharged to by oil outlet under the pump action of pumping gear shaft 1373 and pumping driven shaft 1375, to realize pumping
Function.
It is worth noting that, hydraulic pumping part 137 is also possible to using blade hydraulic pump or plunger hydraulic herein
The hydraulic pump of the other forms such as pump, specific structure do not describe excessively herein.
In conclusion a kind of oil suction decompressor 100 is present embodiments provided, its working principles are as follows: in hydraulic motor
When 110 drain tap oil pressure is higher, the oil in the first oil return pipe 180 is input to hydraulic-driven part by the second oil inlet pipe 131
It drives impeller shaft 1353 to rotate in 135, then is discharged in drain mast 190 by the second oil return pipe 133, impeller shaft 1353 passes through the
The transmission effect driving pumping gear shaft 1373 of one driving cog 1355 and the second driving cog 1377 rotates, thus by the oil of draining section
It is pumped to conveying section, and reduces the pressure of drain tap, drain tap is avoided and oil accumulation phenomenon occurs.Compared to the prior art, originally
A kind of oil suction decompressor 100 that embodiment provides, is pumped to oil for the oil in drain mast 190 using oil suction pump 130
Case 150 can reduce the pressure inside hydraulic motor 110, avoid the occurrence of oil leakage phenomenon.It simultaneously can be to the first oil return pipe 180
In oil reused, avoid using external power source drive oil suction pump 130, saved the energy.
Second embodiment
A kind of oil suction depressurized system, including oil feed pump and oil suction decompressor 100 are present embodiments provided, wherein oil suction subtracts
The basic structure of pressure device 100 is identical with first embodiment with principle and the technical effect of generation, to briefly describe, the present embodiment
Part does not refer to place, can refer to corresponding contents in first embodiment.
Oil suction decompressor 100 includes hydraulic motor 110, oil suction pump 130 and fuel tank 150, and hydraulic motor 110 has
There are the first oil inlet pipe 170 and the first oil return pipe 180, the first oil return pipe 180 is connect with fuel tank 150, and hydraulic motor 110, which also has, to be let out
Oil pipe 190, drain mast 190 are connect with fuel tank 150, oil suction pump 130 be arranged on drain mast 190 and with the first oil return pipe
180 connections, for the oil in drain mast 190 to be pumped to fuel tank 150.Oil feed pump is connect with the first oil inlet pipe 170.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of oil suction decompressor, which is characterized in that including hydraulic motor, oil suction pump and fuel tank, the hydraulic horse
Up to having the first oil inlet pipe and the first oil return pipe, first oil return pipe is connect with the fuel tank, and the hydraulic motor also has
Drain mast, the drain mast are connect with the fuel tank, the oil suction pump be arranged on drain mast and with described first time
Oil pipe connection, for the oil in the drain mast to be pumped to the fuel tank.
2. oil suction decompressor according to claim 1, which is characterized in that the oil suction pump has the second oil inlet
Pipe and the second oil return pipe, one end of second oil inlet pipe connect with first oil return pipe, second oil inlet pipe it is another
End is connect with the oil suction pump, and one end of second oil return pipe is connect with the oil suction pump, and described second
The other end of oil return pipe is connect with the drain mast.
3. oil suction decompressor according to claim 2, which is characterized in that the oil suction pump includes hydraulic-driven
Part and hydraulic pumping part, the hydraulic-driven part have oil inlet end and oil outlet, and second oil inlet pipe and the oil inlet end connect
It connects, for the hydraulic-driven part fuel feeding, second oil return pipe to be connect with the oil outlet, the hydraulic-driven part and institute
The transmission connection of hydraulic pumping part is stated, the hydraulic pumping part is arranged on the drain mast.
4. oil suction decompressor according to claim 3, which is characterized in that the hydraulic pumping part divides the drain mast
For draining section and conveying section, the draining section is connect with the hydraulic motor, and the conveying section is connect with the fuel tank, and described
Two oil return pipes are connect with the draining section.
5. oil suction decompressor according to claim 3, which is characterized in that the hydraulic-driven part include drive shell,
Impeller shaft and the first driving cog, the drive shell be arranged on the hydraulic pumping part and have the oil inlet end and it is described go out
Oily end, the impeller shaft are rotatably arranged in the drive shell, and the end of the impeller shaft is arranged in first driving cog
And can be rotated synchronously with the impeller shaft, the hydraulic pumping part and first driving cog are sequentially connected, the impeller
Impeller blade is provided on axis, for driving the impeller shaft to rotate under hydraulic-driven.
6. oil suction decompressor according to claim 5, which is characterized in that the hydraulic pumping part include pumping valve body,
Gear shaft and the second driving cog are pumped, the pumping valve body is arranged on the drain mast and connect with the drive shell, institute
It states pumping gear shaft to be rotatably arranged in the pumping valve body, the end of the pumping gear shaft is arranged in second driving cog
And it is sequentially connected with first driving cog.
7. oil suction decompressor according to claim 6, which is characterized in that the hydraulic pumping part further includes that pumping is driven
Axis is provided with driving gear on the pumping gear shaft, is provided with driven gear, the driving gear on the pumping driven shaft
It is meshed with the driven gear and forms pump and inhale channel, for pumping the oil in the drain mast.
8. oil suction decompressor according to claim 2, which is characterized in that be provided with electromagnetism on second oil inlet pipe
Valve.
9. oil suction decompressor according to claim 1, which is characterized in that the hydraulic motor includes motor body and horse
Up to shell, the motor body is accommodated in the motor shell and has oil inlet and oil return opening, the oil inlet with it is described
The connection of first oil inlet pipe, the oil return opening are connect with first oil return pipe, and drain tap is provided on the motor shell, described
Drain tap is connect with the drain mast, and the drain mast is connected to the inside of the motor shell.
10. a kind of oil suction depressurized system, which is characterized in that including oil feed pump and such as the described in any item oil suctions of claim 1-9
Decompressor, the oil feed pump are connect with first oil inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910011577.5A CN109854570B (en) | 2019-01-07 | 2019-01-07 | Oil absorption pressure reducing device and oil absorption pressure reducing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910011577.5A CN109854570B (en) | 2019-01-07 | 2019-01-07 | Oil absorption pressure reducing device and oil absorption pressure reducing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109854570A true CN109854570A (en) | 2019-06-07 |
| CN109854570B CN109854570B (en) | 2023-09-26 |
Family
ID=66894044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910011577.5A Active CN109854570B (en) | 2019-01-07 | 2019-01-07 | Oil absorption pressure reducing device and oil absorption pressure reducing system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1029814A1 (en) * | 1999-01-27 | 2000-08-23 | Deutsche Montan Technologie GmbH | Drive unit for conveyor systems with start-up control or regulation |
| CN101936018A (en) * | 2010-07-26 | 2011-01-05 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Electro-hydraulic proportion control system of loader |
| US20130283776A1 (en) * | 2010-12-28 | 2013-10-31 | Sunward Intelligent Equipment Co., Ltd. | Energy-recovery generation system for handling and carrying electric vehicle |
| CN203272293U (en) * | 2013-05-29 | 2013-11-06 | 天津捷强动力装备有限公司 | Hydraulic circuit preventing hydraulic motors from rotating reversely |
| CN204851831U (en) * | 2015-08-20 | 2015-12-09 | 卡特彼勒（青州）有限公司 | Closed hydraulic system and including this closed hydraulic system's machine |
| CN209261972U (en) * | 2019-01-07 | 2019-08-16 | 苏州瑞奇安机电科技有限公司 | A kind of oil suction decompressor and oil suction depressurized system |
-
2019
- 2019-01-07 CN CN201910011577.5A patent/CN109854570B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1029814A1 (en) * | 1999-01-27 | 2000-08-23 | Deutsche Montan Technologie GmbH | Drive unit for conveyor systems with start-up control or regulation |
| CN101936018A (en) * | 2010-07-26 | 2011-01-05 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Electro-hydraulic proportion control system of loader |
| US20130283776A1 (en) * | 2010-12-28 | 2013-10-31 | Sunward Intelligent Equipment Co., Ltd. | Energy-recovery generation system for handling and carrying electric vehicle |
| CN203272293U (en) * | 2013-05-29 | 2013-11-06 | 天津捷强动力装备有限公司 | Hydraulic circuit preventing hydraulic motors from rotating reversely |
| CN204851831U (en) * | 2015-08-20 | 2015-12-09 | 卡特彼勒（青州）有限公司 | Closed hydraulic system and including this closed hydraulic system's machine |
| CN209261972U (en) * | 2019-01-07 | 2019-08-16 | 苏州瑞奇安机电科技有限公司 | A kind of oil suction decompressor and oil suction depressurized system |
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|---|---|
| CN109854570B (en) | 2023-09-26 |
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