CN109854570B - Oil absorption pressure reducing device and oil absorption pressure reducing system - Google Patents
Oil absorption pressure reducing device and oil absorption pressure reducing system Download PDFInfo
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- CN109854570B CN109854570B CN201910011577.5A CN201910011577A CN109854570B CN 109854570 B CN109854570 B CN 109854570B CN 201910011577 A CN201910011577 A CN 201910011577A CN 109854570 B CN109854570 B CN 109854570B
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Abstract
The invention provides an oil suction and decompression device and an oil suction and decompression system, and relates to the field of hydraulic equipment. Through set up oil absorption pumping component on the oil drain pipe, can be with the oil pumping to the oil tank with the oil acceleration pump in the oil drain pipe to can avoid oil drain pipe jam, and then avoid in the hydraulic motor because of oil drain mouth jam and step up, reduce the inside pressure of hydraulic motor, avoid the oil leak problem.
Description
Technical Field
The invention relates to the field of hydraulic equipment, in particular to an oil absorption and decompression device and an oil absorption and decompression system.
Background
Hydraulic motors, also known as oil motors, are mainly used in injection molding machines, ships, jack-up machines, engineering machines, construction machines, coal mine machines, mining machines, metallurgical machines, marine machines, petrochemical machines, harbour machines, etc.
In the prior art, the oil drain pipeline of the hydraulic motor is longer, so that the resistance and the pressure at the oil drain port of the hydraulic motor are larger easily, and when the limit is exceeded, the pressure in the shell of the hydraulic motor is increased, so that the oil seal of the motor is oil-leaked.
Therefore, the design and manufacture of the oil suction and pressure relief device can pump the oil in the oil drain pipe to the oil tank, reduce the pressure at the oil drain port, reduce the pressure in the hydraulic motor and avoid oil leakage is very important.
Disclosure of Invention
The invention aims to provide an oil suction and decompression device which can pump oil in an oil drain pipe to an oil tank, reduce the pressure at the oil drain port, reduce the pressure in a hydraulic motor and avoid oil leakage.
The invention further aims to provide an oil suction and decompression system which can pump oil in an oil drain pipe to an oil tank, reduce the pressure at the oil drain port, reduce the pressure in the hydraulic motor and avoid oil leakage.
The invention is realized by adopting the following technical scheme.
The utility model provides an oil absorption pressure reducing device, includes hydraulic motor, oil absorption pumping components and oil tank, and hydraulic motor has first oil feed pipe and first oil return pipe, and first oil return pipe is connected with the oil tank, and hydraulic motor still has the oil drain pipe, and the oil drain pipe is connected with the oil tank, and oil absorption pumping components sets up on the oil drain pipe and is connected with first oil return pipe for with the oil pump in the oil drain pipe to the oil tank.
Further, the oil suction pumping assembly is provided with a second oil inlet pipe and a second oil return pipe, one end of the second oil inlet pipe is connected with the first oil return pipe, the other end of the second oil inlet pipe is connected with the oil suction pumping assembly, one end of the second oil return pipe is connected with the oil suction pumping assembly, and the other end of the second oil return pipe is connected with the oil drain pipe.
Further, the oil absorption pumping assembly comprises a hydraulic driving piece and a hydraulic pumping piece, the hydraulic driving piece is provided with an oil inlet end and an oil outlet end, a second oil inlet pipe is connected with the oil inlet end and used for supplying oil to the hydraulic driving piece, a second oil return pipe is connected with the oil outlet end, the hydraulic driving piece is in transmission connection with the hydraulic pumping piece, and the hydraulic pumping piece is arranged on the oil drain pipe.
Further, the hydraulic pumping piece divides the oil drain pipe into an oil drain section and a conveying section, the oil drain section is connected with the hydraulic motor, the conveying section is connected with the oil tank, and the second oil return pipe is connected with the oil drain section.
Further, the hydraulic driving piece comprises a driving shell, an impeller shaft and a first transmission gear, the driving shell is arranged on the hydraulic pumping piece and is provided with an oil inlet end and an oil outlet end, the impeller shaft is rotatably arranged in the driving shell, the first transmission gear is arranged at the end part of the impeller shaft and can synchronously rotate along with the impeller shaft, the hydraulic pumping piece is in transmission connection with the first transmission gear, and impeller blades are arranged on the impeller shaft and used for driving the impeller shaft to rotate under hydraulic driving.
Further, the hydraulic pumping member comprises a pumping valve body, a pumping gear shaft and second transmission teeth, wherein the pumping valve body is arranged on the oil drain pipe and is connected with the driving shell, the pumping gear shaft is rotatably arranged in the pumping valve body, and the second transmission teeth are arranged at the end part of the pumping gear shaft and are in transmission connection with the first transmission teeth.
Further, the hydraulic pumping piece further comprises a pumping driven shaft, a driving gear is arranged on the pumping gear shaft, a driven gear is arranged on the pumping driven shaft, and the driving gear is meshed with the driven gear to form a pumping channel for pumping oil in the oil drain pipe.
Further, the second oil inlet pipe is provided with an electromagnetic valve.
Further, the hydraulic motor comprises a motor body and a motor shell, wherein the motor body is accommodated in the motor shell and is provided with an oil inlet and an oil return opening, the oil inlet is connected with a first oil inlet pipe, the oil return opening is connected with a first oil return pipe, an oil drain opening is arranged on the motor shell and is connected with an oil drain pipe, and the oil drain pipe is communicated with the inside of the motor shell.
The utility model provides an oil absorption decompression system, includes fuel feed pump and oil absorption pressure relief device, and oil absorption pressure relief device includes hydraulic motor, oil absorption pumping components and oil tank, and hydraulic motor has first oil feed pipe and first oil return pipe, and first oil return pipe is connected with the oil tank, and hydraulic motor still has the oil drain pipe, and the oil drain pipe is connected with the oil tank, and oil absorption pumping components sets up on the oil drain pipe and is connected with first oil return pipe for with the oil pump in the oil drain pipe to the oil tank. The oil feed pump is connected with the first oil inlet pipe.
The invention has the following beneficial effects:
the invention provides an oil absorption and decompression device, wherein a hydraulic motor is provided with a first oil inlet pipe and a first oil return pipe, the first oil return pipe is connected with an oil tank, the hydraulic motor is also provided with an oil drain pipe, the oil drain pipe is connected with the oil tank, and an oil absorption pumping assembly is arranged on the oil drain pipe and connected with the first oil return pipe. Through set up oil absorption pumping component on the oil drain pipe, can be with the oil pumping to the oil tank with the oil acceleration pump in the oil drain pipe to can avoid oil drain pipe jam, and then avoid in the hydraulic motor because of oil drain mouth jam and step up, reduce the inside pressure of hydraulic motor, avoid the oil leak problem. Compared with the prior art, the oil suction and decompression device provided by the invention has the advantages that the oil in the oil drain pipe is pumped to the oil tank by the oil suction pumping assembly, so that the pressure in the hydraulic motor can be reduced, and the oil leakage phenomenon is avoided.
The oil absorption pressure reducing device that this embodiment provided, oil absorption pumping components have second advance oil pipe and second returns oil pipe, and the one end that the second advances oil pipe is connected with first time oil pipe, and the other end that the second advances oil pipe is connected with oil absorption pumping components, and the one end that the second returned oil pipe is connected with oil absorption pumping components, and the other end that the second returned oil pipe is connected with the oil drain pipe. The oil in the first oil return pipe is introduced into the oil suction pumping assembly through the second oil inlet pipe, so that the oil suction pumping assembly is driven to pump the oil in the oil drain pipe to the oil tank, the oil in the first oil return pipe can be reused, the oil suction pumping assembly is prevented from being driven by an external power source, and energy sources are saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an oil absorption and decompression device according to a first embodiment of the present invention;
fig. 2 is a schematic view of a connection structure of the oil suction pumping assembly of fig. 1;
FIG. 3 is a schematic view of the connection structure of the hydraulic driving member of FIG. 2;
FIG. 4 is a schematic illustration of the configuration of the hydraulic pumping member of FIG. 2;
fig. 5 is a schematic diagram of a connection structure between the hydraulic driving member and the hydraulic pumping member in fig. 2.
Icon: 100-an oil absorption and decompression device; 110-a hydraulic motor; 130-an oil suction pumping assembly; 131-a second oil inlet pipe; 133-a second oil return pipe; 135-hydraulic drive; 1351-a drive housing; 1353-impeller shaft; 1355-first drive teeth; 137-hydraulic pumping member; 1371-pumping valve body; 1373-pumping gear shaft; 1375-pumping driven shaft; 1377-second drive teeth; 150-an oil tank; 170-a first oil inlet pipe; 180-a first oil return pipe; 190-oil drain pipe.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in place when the inventive product is used, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. Features of the embodiments described below may be combined with each other without conflict.
First embodiment
Referring to fig. 1, the present embodiment provides an oil absorption and decompression device 100, which includes a hydraulic motor 110, an oil absorption pumping assembly 130 and an oil tank 150, wherein the hydraulic motor 110 has a first oil inlet pipe 170 and a first oil return pipe 180, the first oil return pipe 180 is connected with the oil tank 150, the hydraulic motor 110 further has an oil drain pipe 190, the oil drain pipe 190 is connected with the oil tank 150, and the oil absorption pumping assembly 130 is disposed on the oil drain pipe 190 and connected with the first oil return pipe 180 for pumping oil in the oil drain pipe 190 to the oil tank 150.
In the present embodiment, the first oil inlet pipe 170 and the first oil return pipe 180 are both provided at the upper portion of the hydraulic motor 110, and the oil drain pipe 190 is provided at the side portion of the hydraulic motor 110 and communicates with the inside of the hydraulic motor 110, so that oil inside the hydraulic motor 110 can be drained.
The first oil inlet pipe 170 is connected to an external oil supply pump, and high-pressure oil is supplied to the hydraulic motor 110 through the oil supply pump, so that the hydraulic motor 110 is driven to operate, and the specific principle thereof will not be described herein.
In this embodiment, the hydraulic motor 110 includes a motor body and a motor housing, the motor body is accommodated in the motor housing and has an oil inlet and an oil return port, the oil inlet is connected with the first oil inlet pipe 170, the oil return port is connected with the first oil return pipe 180, an oil drain port is provided on the motor housing, the oil drain port is connected with the oil drain pipe 190, and the oil drain pipe 190 is communicated with the interior of the motor housing.
In this embodiment, the motor housing has a sealed inner cavity therein, and the accumulated oil in the motor housing is discharged through the oil drain port, specifically, the oil drain port may be disposed at the bottom of the motor housing, so that the oil drain effect can be further achieved.
Referring to fig. 2 to 4, the oil suction pumping assembly 130 has a second oil inlet pipe 131 and a second oil return pipe 133, one end of the second oil inlet pipe 131 is connected with the first oil return pipe 180, the other end of the second oil inlet pipe 131 is connected with the oil suction pumping assembly 130, one end of the second oil return pipe 133 is connected with the oil suction pumping assembly 130, and the other end of the second oil return pipe 133 is connected with the oil drain pipe 190.
In other preferred embodiments of the present invention, the second oil inlet pipe 131 is provided with a solenoid valve. Specifically, when the distance of the oil drain pipe 190 is short, the second oil inlet pipe 131 is closed by the electromagnetic valve at the moment, the original oil drain mode is still kept for oil drain, and when the oil drain pipe 190 is too long or the oil drain pipe is blocked, the second oil inlet pipe 131 is opened by the electromagnetic valve, so that the auxiliary oil drain can be performed.
It should be noted that, because the oil pressure in the first oil return pipe 180 is generally above 1MPa, and the oil pressure in the oil drain pipe 190 is generally below 0.5MPa, the oil in the first oil return pipe 180 can enter the oil suction pumping assembly 130 through the second oil inlet pipe 131 under the pressure driving, the oil suction pumping assembly 130 is driven to flow into the oil drain pipe 190 through the second oil return pipe 133, and the oil in the first oil return pipe 180 is driven by the pressure difference, so that the oil suction pumping assembly 130 is driven, the existing pipeline is fully utilized, the oil in the first oil return pipe 180 can be recycled, the driving of the oil suction pumping assembly 130 by using an external power source is avoided, and the energy is saved.
The oil suction pumping assembly 130 comprises a hydraulic driving member 135 and a hydraulic pumping member 137, wherein the hydraulic driving member 135 is provided with an oil inlet end and an oil outlet end, the second oil inlet pipe 131 is connected with the oil inlet end and is used for supplying oil to the hydraulic driving member 135, the second oil return pipe 133 is connected with the oil outlet end, the hydraulic driving member 135 is in transmission connection with the hydraulic pumping member 137, and the hydraulic pumping member 137 is arranged on the oil drain pipe 190.
In the present embodiment, the hydraulic pumping member 137 divides the drain pipe 190 into a drain section connected to the hydraulic motor 110 and a delivery section connected to the oil tank 150, and the second oil return pipe 133 is connected to the drain section.
In other preferred embodiments of the present invention, the second oil return pipe 133 is directly connected to the oil tank 150, and can directly drain the oil to the oil tank 150.
The hydraulic driving member 135 includes a driving housing 1351, an impeller shaft 1353 and a first transmission gear 1355, the driving housing 1351 is disposed on the hydraulic pumping member 137 and has an oil inlet end and an oil outlet end, the impeller shaft 1353 is rotatably disposed in the driving housing 1351, the first transmission gear 1355 is disposed at an end portion of the impeller shaft 1353 and is capable of rotating synchronously with the impeller shaft 1353, the hydraulic pumping member 137 is in transmission connection with the first transmission gear 1355, and the impeller shaft 1353 is provided with impeller blades for driving the impeller shaft 1353 to rotate under hydraulic driving.
The hydraulic pumping member 137 includes a pumping valve body 1371, a pumping gear shaft 1373, a pumping driven shaft 1375, and second transmission teeth 1377, the pumping valve body 1371 being provided on the oil drain pipe 190 and connected with the driving housing 1351, the pumping gear shaft 1373 being rotatably provided in the pumping valve body 1371, the second transmission teeth 1377 being provided at an end portion of the pumping gear shaft 1373 and in transmission connection with the first transmission teeth 1355. The pumping gear shaft 1373 is provided with a driving gear, and the pumping driven shaft 1375 is provided with a driven gear, and the driving gear is engaged with the driven gear and forms a pumping channel for pumping the oil in the oil drain pipe 190.
In this embodiment, the size of the pumping valve body 1371 is larger than that of the oil drain pipe 190, oil inlet holes and oil outlet holes are formed in two ends of the pumping valve body 1371, and pumping inner cavities are formed in the pumping valve body 1371, the oil inlet holes and the oil outlet holes are respectively connected with the oil drain section and the conveying section, oil in the hydraulic motor 110 can be conveyed to the pumping inner cavities through the oil drain section, and the oil is discharged to the conveying section through the oil outlet holes under the pumping action of the pumping gear shaft 1373 and the pumping driven shaft 1375, so that the pumping function is achieved.
It should be noted that the hydraulic pumping member 137 may be a vane type hydraulic pump or a plunger type hydraulic pump, and the like, and the specific structure thereof is not described herein.
In summary, the present embodiment provides an oil absorption and decompression device 100, which has the following working principle: when the oil pressure of the oil drain port of the hydraulic motor 110 is high, the oil in the first oil return pipe 180 is input into the hydraulic driving piece 135 through the second oil inlet pipe 131 to drive the impeller shaft 1353 to rotate, and then is discharged into the oil drain pipe 190 through the second oil return pipe 133, and the impeller shaft 1353 drives the pumping gear shaft 1373 to rotate under the transmission action of the first transmission teeth 1355 and the second transmission teeth 1377, so that the oil in the oil drain section is pumped to the conveying section, the pressure of the oil drain port is reduced, and the phenomenon of oil accumulation in the oil drain port is avoided. Compared to the prior art, the oil suction and decompression device 100 provided in the present embodiment utilizes the oil suction pumping assembly 130 to pump the oil in the oil drain pipe 190 to the oil tank 150, so as to reduce the pressure inside the hydraulic motor 110 and avoid oil leakage. Meanwhile, the oil in the first oil return pipe 180 can be reused, the oil suction pumping assembly 130 is prevented from being driven by an external power source, and energy sources are saved.
Second embodiment
The present embodiment provides an oil absorption and decompression system, which includes an oil supply pump and an oil absorption and decompression device 100, wherein the basic structure and principle of the oil absorption and decompression device 100 and the technical effects are the same as those of the first embodiment, and for brevity, the details of the first embodiment are referred to in the corresponding parts of the first embodiment.
The oil suction and relief device 100 includes a hydraulic motor 110, an oil suction pumping assembly 130 and an oil tank 150, the hydraulic motor 110 having a first oil inlet pipe 170 and a first oil return pipe 180, the first oil return pipe 180 being connected to the oil tank 150, the hydraulic motor 110 further having an oil drain pipe 190, the oil drain pipe 190 being connected to the oil tank 150, the oil suction pumping assembly 130 being disposed on the oil drain pipe 190 and being connected to the first oil return pipe 180 for pumping oil in the oil drain pipe 190 to the oil tank 150. The feed pump is connected to the first oil feed pipe 170.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The oil suction and decompression device is characterized by comprising a hydraulic motor, an oil suction pumping assembly and an oil tank, wherein the hydraulic motor is provided with a first oil inlet pipe and a first oil return pipe, the first oil return pipe is connected with the oil tank, the hydraulic motor is also provided with an oil drain pipe, the oil drain pipe is connected with the oil tank, and the oil suction pumping assembly is arranged on the oil drain pipe and is connected with the first oil return pipe and is used for pumping oil in the oil drain pipe to the oil tank;
the oil suction pumping assembly is provided with a second oil inlet pipe and a second oil return pipe, one end of the second oil inlet pipe is connected with the first oil return pipe, the other end of the second oil inlet pipe is connected with the oil suction pumping assembly, one end of the second oil return pipe is connected with the oil suction pumping assembly, and the other end of the second oil return pipe is connected with the oil drain pipe;
the oil suction pumping assembly comprises a hydraulic driving piece and a hydraulic pumping piece, the hydraulic driving piece is provided with an oil inlet end and an oil outlet end, the second oil inlet pipe is connected with the oil inlet end and used for supplying oil to the hydraulic driving piece, the second oil return pipe is connected with the oil outlet end, the hydraulic driving piece is in transmission connection with the hydraulic pumping piece, and the hydraulic pumping piece is arranged on the oil drain pipe;
the hydraulic driving piece comprises a driving shell, an impeller shaft and first transmission teeth, the driving shell is arranged on the hydraulic pumping piece and is provided with an oil inlet end and an oil outlet end, the impeller shaft is rotatably arranged in the driving shell, the first transmission teeth are arranged at the end part of the impeller shaft and can synchronously rotate along with the impeller shaft, the hydraulic pumping piece is in transmission connection with the first transmission teeth, and the impeller shaft is provided with impeller blades for driving the impeller shaft to rotate under hydraulic driving;
the hydraulic motor comprises a motor body and a motor shell, wherein the motor body is accommodated in the motor shell and is provided with an oil inlet and an oil return port, the oil inlet is connected with a first oil inlet pipe, the oil return port is connected with a first oil return pipe, an oil drain port is arranged on the motor shell and is connected with the oil drain pipe, and the oil drain pipe is communicated with the inside of the motor shell.
2. The oil absorption and decompression device according to claim 1, wherein the hydraulic pumping member divides the oil drain pipe into an oil drain section and a delivery section, the oil drain section is connected with the hydraulic motor, the delivery section is connected with the oil tank, and the second oil return pipe is connected with the oil drain section.
3. The oil absorption and decompression device according to claim 1, wherein the hydraulic pumping member comprises a pumping valve body, a pumping gear shaft and second transmission teeth, the pumping valve body is arranged on the oil drain pipe and connected with the driving shell, the pumping gear shaft is rotatably arranged in the pumping valve body, and the second transmission teeth are arranged at the end part of the pumping gear shaft and are in transmission connection with the first transmission teeth.
4. The oil absorption and decompression device according to claim 3, wherein the hydraulic pumping member further comprises a pumping driven shaft, a driving gear is arranged on the pumping gear shaft, a driven gear is arranged on the pumping driven shaft, and the driving gear is meshed with the driven gear and forms a pumping channel for pumping the oil in the oil drain pipe.
5. The oil suction and pressure relief device as claimed in claim 1, wherein said second oil inlet pipe is provided with a solenoid valve.
6. An oil absorption and decompression system, characterized by comprising an oil supply pump and an oil absorption and decompression device according to any one of claims 1-5, wherein the oil supply pump is connected with the 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 |
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| Publication Number | Publication Date |
|---|---|
| CN109854570A CN109854570A (en) | 2019-06-07 |
| CN109854570B true CN109854570B (en) | 2023-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| 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 (5)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108948B (en) * | 2010-12-28 | 2012-11-28 | 山河智能装备股份有限公司 | Renewable energy power generating system applicable to electrocar for loading, unloading and transporting |
-
2019
- 2019-01-07 CN CN201910011577.5A patent/CN109854570B/en active Active
Patent Citations (5)
| 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 |
| 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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| CN109854570A (en) | 2019-06-07 |
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