WO2022027754A1 - 一种双进出油口的液压动力装置 - Google Patents

一种双进出油口的液压动力装置 Download PDF

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Publication number
WO2022027754A1
WO2022027754A1 PCT/CN2020/112644 CN2020112644W WO2022027754A1 WO 2022027754 A1 WO2022027754 A1 WO 2022027754A1 CN 2020112644 W CN2020112644 W CN 2020112644W WO 2022027754 A1 WO2022027754 A1 WO 2022027754A1
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WIPO (PCT)
Prior art keywords
flow distribution
plunger
distribution
hole
power device
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PCT/CN2020/112644
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English (en)
French (fr)
Inventor
何清华
李赛白
戴鹏
方庆琯
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山河智能装备股份有限公司
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Publication of WO2022027754A1 publication Critical patent/WO2022027754A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0639—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0644—Component parts
    • F03C1/0652—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0644—Component parts
    • F03C1/0655—Valve means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F03C1/0644—Component parts
    • F03C1/0663—Casings, housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0678—Control
    • F03C1/0681—Control using a valve in a system with several motor chambers, wherein the flow path through the chambers can be changed

Definitions

  • the invention belongs to the technical field of hydraulic transmission, in particular to a hydraulic power device with dual oil inlet and outlet ports.
  • Hydraulic transmission is widely used in engineering machinery, construction machinery, agricultural machinery and metallurgical machinery due to its advantages of high power density and stable operation. With the continuous development of the machine, there are more and more cases of synchronous movement of multiple actuators, and synchronous control is required.
  • the commonly used synchronizing circuits mainly include throttling synchronizing circuits and positive displacement synchronizing circuits.
  • the throttling synchronous circuit using the current collecting and diverting valve has an accuracy of 2%--5% and a low price.
  • Positive displacement synchronous circuits can use synchronous cylinders or synchronous motors/pumps. Synchronous gear motor type is currently widely used positive displacement synchronous element. When the load pressure of the actuator is not much different, the accuracy is 1-3%, but if the load pressure difference of the actuator is large, the synchronization accuracy is 10-15%. It can no longer meet the requirements of the high-pressure differential synchronous circuit.
  • the main purpose of the present invention is to provide a hydraulic power device with dual oil inlet and outlet ports with high synchronization precision, compact structure and strong adaptability to working conditions.
  • a hydraulic power device with double oil inlet and outlet including a plunger type hydraulic motor, a plurality of plunger holes are evenly distributed around the center of the cylinder body of the plunger type hydraulic motor, and each of the plunger holes passes through One flow distribution hole penetrates to the flow distribution surface of the cylinder, the flow distribution hole is divided into the same number of inner flow distribution holes and outer flow distribution holes, and the inner flow distribution holes and the outer flow distribution holes are alternately distributed on different index circles of the flow distribution surface.
  • a first distribution groove and a second distribution groove are distributed side by side on one side of the distribution plate of the plunger hydraulic motor, and a third distribution groove is distributed on the other side, wherein the first distribution groove is used for distribution with the inner side.
  • the second flow distribution groove is used for communication with the outer flow distribution hole, and the third flow distribution groove is used for communication with the inner flow distribution hole and the outer flow distribution hole.
  • the end cover of the plunger type hydraulic motor is provided with three groups of oil ports, and the three groups of oil ports are respectively communicated with the first distribution groove, the second distribution groove and the third distribution groove.
  • the plunger type hydraulic motor includes a housing, a transmission shaft, a cylinder block, a plunger, an end cover and a swash plate.
  • the swash plate is fixedly connected with the casing, the transmission shaft is installed in the cavity enclosed by the casing and the end cover through a bearing, and the plunger is arranged in the plunger hole of the cylinder block wherein, the plunger is in contact with the inclined surface of the swash plate, and the transmission shaft passes through the swash plate and is connected to the transmission hole of the cylinder in a driving manner.
  • a plurality of the plungers of the cylinder body are pressed against the swash plate by the return plate.
  • the head of the plunger has a sliding shoe
  • the spring on the axial plunger cylinder presses the sliding shoe on the swash plate through the return plate.
  • the flow distribution plate is located between the cylinder body and the end cover, and the end cover is sealedly connected to the cylinder body, so that the flow distribution plate is sealedly connected to the cylinder body.
  • the housing is connected to the end cover through mounting bolts.
  • the present invention has beneficial effects.
  • the on-off control can be realized by adding a control valve between the three pressure oil ports.
  • the hydraulic oil is equally distributed to the first oil port and the second oil port, and the high-pressure oil also enters the motor through the first oil port and the second oil port, drives the motor to rotate, and outputs the hydraulic oil through the third oil port.
  • the hydraulic power unit with double inlet and outlet has the advantages of high synchronization precision, compact structure and strong adaptability to working conditions.
  • FIG. 1 is a schematic structural diagram of a hydraulic power device with dual oil inlets and outlets provided by an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a cylinder block and a valve plate in an embodiment of the present invention.
  • a hydraulic power device with dual oil inlet and outlet includes a 5-type plunger hydraulic motor
  • the 5-type plunger hydraulic motor includes a housing 1, a swash plate 3, a sliding shoe 4, a plunger 5, a cylinder block 6, Distribution plate 7, transmission shaft 9 and end cover 10.
  • the casing 1 is connected to the end cover 10 through the mounting bolts 8, the transmission shaft 9 is installed in the cavity enclosed by the casing 1 and the end cover 10 through the bearing 2, and a number of plunger holes are evenly distributed around the center of the cylinder block 6. 11.
  • the plunger 5 is arranged in the plunger hole of the cylinder block 6, the plunger 5 is in contact with the inclined surface of the swash plate 3, the transmission shaft 9 passes through the swash plate 3 and is connected to the transmission hole of the cylinder block 6, and the swash plate 3 Then it is fixedly connected with the housing 1 .
  • each plunger hole passes through a distribution hole to the distribution surface of the cylinder block 6, and the distribution hole is divided into the same number of inner distribution holes and outer distribution holes, and the inner distribution holes and the outer distribution holes are alternately distributed on the distribution surface.
  • the first distribution groove Y1 and the second distribution groove Y2 are distributed side by side on one side of the distribution plate 7 of the plunger 5 hydraulic motor, and the third distribution groove Y3 is distributed on the other side.
  • Y1 is used to communicate with the inner distribution hole
  • the second distribution groove Y2 is used to communicate with the outer distribution hole
  • the third distribution groove Y3 is used to communicate with the inner distribution hole and the outer distribution hole.
  • the distribution groove Y3 is communicated.
  • the plunger 5 is installed in the cylinder block 6 in an annular array, the adjacent plungers 5 are alternately communicated with the first distribution groove Y1 and the second distribution groove Y2, and the high-pressure oil can pass through the third distribution groove Y3.
  • the three oil ports enter the motor, drive the motor to rotate, and distribute the hydraulic oil to the first oil port and the second oil port in equal amounts.
  • the high-pressure oil also enters the motor through the first oil port and the second oil port, and drives the motor to rotate. Oil is output through the third oil port.
  • the hydraulic power unit with double inlet and outlet has the advantages of high synchronization precision, compact structure and strong adaptability to working conditions.
  • the plunger 5 is pressed on the swash plate 3 through the return disc.
  • the head of each plunger 5 has a sliding shoe 4, and the spring on the cylinder of the axial plunger 5 passes through The return disc presses the shoe 4 against the swash plate 3 .
  • valve plate 7 is located between the cylinder block 6 and the end cover 10 , and the end cover 10 is sealedly connected to the cylinder block 6 , so that the valve plate 7 is sealedly connected to the cylinder block 6 , and the swash plate 3 is fixed by the swash plate 3
  • the screws are fastened to the housing 1 .
  • the plunger 5 is installed in the plunger hole of the cylinder block 6, and the front end of the plunger 5 is installed with a sliding shoe 4, which is pressed by a spring.
  • a sliding shoe 4 which is pressed by a spring.
  • the on-off control can be realized by adding a control valve between the three pressure oil ports.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Motors (AREA)

Abstract

一种双进出油口的液压动力装置，包括柱塞式液压马达，柱塞式液压马达的缸体（6）上环绕其中心均匀分布着若干个柱塞孔（11），每个柱塞孔（11）均通过一个配流孔（12）贯通至缸体（6）的配流面，配流孔（12）分成内侧配流孔和外侧配流孔，内侧配流孔和外侧配流孔数量相同，交替分布在配流面不同的分度圆上；柱塞式液压马达的配流盘（7）一侧并排分布有第一配流槽（Y1）和第二配流槽（Y2），另一侧分布有第三配流槽（Y3），其中，第一配流槽（Y1）用于与内侧配流孔连通，第二配流槽（Y2）用于与外侧配流孔连通，第三配流槽（Y3）用于与内侧配流孔和外侧配流孔连通；柱塞式液压马达的端盖（10）上设有三组油口，三组油口分别与第一配流槽（Y1）、第二配流槽（Y2）和第三配流槽（Y3）连通。

Description

一种双进出油口的液压动力装置 技术领域
本发明属于液压传动技术领域，尤其涉及一种双进出油口的液压动力装置。
 背景技术
液压传动由于其功率密度高，工作平稳等优点，广泛应用于工程机械，建筑机械，农业机械和冶金机械等领域。随着机器不断发展，多执行元件同步运动的情况越来越多，需要进行同步控制。
目前常用的同步回路主要有节流式同步回路和容积式同步回路。比如采用集流分流阀的节流式同步回路，精度为2％--5％，价格低。容积式同步回路可采用同步油缸或者同步马达/泵。同步齿轮马达式目前应用较广泛的容积式同步元件，当执行元件负载压力相差不大时，其精度为1-3%，但若执行元件负载压差大，其同步精度为10-15%，已不能满足高压差同步回路的要求。
 技术问题
本发明的主要目的在于提供一种同步精度高，结构紧凑，工况适应性强的双进出油口的液压动力装置。
 技术解决方案
为实现上述目的，本申请采用如下技术方案。
一种双进出油口的液压动力装置，包括柱塞式液压马达，所述柱塞式液压马达的缸体上环绕其中心均匀分布着若干个柱塞孔，每个所述柱塞孔均通过一个配流孔贯通至缸体的配流面，所述配流孔分成数量相同的内侧配流孔和外侧配流孔，所述内侧配流孔和外侧配流孔交替分布在所述配流面不同的分度圆上。
所述柱塞式液压马达的配流盘一侧并排分布有第一配流槽和第二配流槽，另一侧分布有第三配流槽，其中，所述第一配流槽用于与所述内侧配流孔连通，所述第二配流槽用于与所述外侧配流孔连通，所述第三配流槽用于与所述内侧配流孔和外侧配流孔连通。
所述柱塞式液压马达的端盖上设有三组油口，三组油口分别与所述第一配流槽、第二配流槽和第三配流槽连通。
具体的，所述柱塞式液压马达包括壳体、传动轴、缸体、柱塞、端盖和斜盘。
所述斜盘与所述壳体固定连接，所述传动轴通过轴承安装在所述壳体与所述端盖围成的空腔中，所述柱塞设置在所述缸体的柱塞孔中，所述柱塞与所述斜盘的斜面抵接，所述传动轴穿过所述斜盘后与所述缸体的传动孔传动连接。
具体的，所述缸体的多个所述柱塞通过回程盘压紧在所述斜盘上。
具体的，所述柱塞的头部有一滑靴，所述轴向柱塞油缸上的弹簧通过所述回程盘将所述滑靴压紧在所述斜盘上。
具体的，所述配流盘位于所述缸体与所述端盖之间，所述端盖与所述缸体密封连接，以使所述配流盘与所述缸体密封连接。
具体的，所述壳体通过安装螺栓与所述端盖连接。
 有益效果
与现有技术相比，本发明具有的有益效果在于。
在壳体上有三组油口，三个压力油口之间可以通过增加控制阀来实现通断控制，高压油可以通过与第三配流槽对应的第三油口进入马达，驱动马达旋转，将液压油等量的分配给第一油口和第二油口，高压油也通过第一油口和第二油口进入马达，驱动马达旋转，将液压油通过第三油口输出。相比齿轮同步马达，该双进出油口的液压动力装置具有同步精度高，结构紧凑，工况适应性强等优点。
 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的双进出油口的液压动力装置结构示意图。
图2是本发明实施例中缸体与配流盘结构示意图。
其中：1-壳体；2-轴承；3-斜盘；4-滑靴；5-柱塞；6-缸体；7-配流盘；8-安装螺栓；9-传动轴；10-端盖；11-柱塞孔；12-配流孔；Y1-第一配流槽；Y2-第二配流槽；Y3-第三配流槽。
 本发明的实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
参见图1，一种双进出油口的液压动力装置，包括柱塞5式液压马达，柱塞5式液压马达包括壳体1、斜盘3、滑靴4、柱塞5、缸体6、配流盘7、传动轴9和端盖10。
壳体1通过安装螺栓8与端盖10连接，传动轴9通过轴承2安装在壳体1与端盖10围成的空腔中，缸体6上环绕其中心均匀分布着若干个柱塞孔11，柱塞5设置在缸体6的柱塞孔中，柱塞5与斜盘3的斜面抵接，传动轴9穿过斜盘3后与缸体6的传动孔传动连接，斜盘3则与壳体1固定连接。
参见图2，每个柱塞孔均通过一个配流孔贯通至缸体6的配流面，配流孔分成数量相同的内侧配流孔和外侧配流孔，内侧配流孔和外侧配流孔交替分布在配流面不同的分度圆上，柱塞5式液压马达的配流盘7一侧并排分布有第一配流槽Y1和第二配流槽Y2，另一侧分布有第三配流槽Y3，其中，第一配流槽Y1用于与内侧配流孔连通，第二配流槽Y2用于与外侧配流孔连通，第三配流槽Y3用于与内侧配流孔和外侧配流孔连通，在端盖10上设有三组油口，分别取名为第一油口、第二油口和第三油口，其中，第一油口与第一配流槽Y1，第二油口与第二配流槽Y2，第三油口与第三配流槽Y3连通。
参见1和图2，在本申请实施例中，配流盘7一侧开有两排腰形槽（第一配流槽Y1、第二配流槽Y2），另一侧有一排腰形槽（第三配流槽Y3），柱塞5环形阵列安装在缸体6内，相邻柱塞5交替与第一配流槽Y1和第二配流槽Y2相通，高压油可以通过与第三配流槽Y3对应的第三油口进入马达，驱动马达旋转，将液压油等量的分配给第一油口和第二油口，高压油也通过第一油口和第二油口进入马达，驱动马达旋转，将液压油通过第三油口输出。相比齿轮同步马达，该双进出油口的液压动力装置具有同步精度高，结构紧凑，工况适应性强等优点。
参见1和图2，具体的，柱塞5通过回程盘压紧在斜盘3上，具体而言，每个柱塞5的头部有一滑靴4，轴向柱塞5油缸上的弹簧通过回程盘将滑靴4压紧在斜盘3上。
参见1和图2，配流盘7位于缸体6与端盖10之间，端盖10与缸体6密封连接，以使配流盘7与缸体6密封连接，斜盘3通过斜盘3固定螺钉与壳体1紧固连接。
参见1和图2，缸体6上均匀分布着几个轴向排列的柱塞孔，柱塞5安装在缸体6的柱塞孔内，柱塞5前端安装有滑靴4，通过弹簧压紧在斜盘3上，壳体1上有三组油口，三个压力油口之间可以通过增加控制阀来实现通断控制，油口进出油压力不同时，驱动马达进行旋转，该动力装置两端均没有输出轴，通过壳体1各个油口不同压力的组合，驱动马达旋转，实现动力的转换和传递。
上述实施例仅仅是清楚地说明本发明所作的举例，而非对实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里也无需也无法对所有的实施例予以穷举。而由此所引申出的显而易见的变化或变动仍处于本发明的保护范围之中。

Claims (6)

  1. 一种双进出油口的液压动力装置，包括柱塞式液压马达，所述柱塞式液压马达的缸体（6）上环绕其中心均匀分布着若干个柱塞孔（11），每个所述柱塞孔（11）均通过一个配流孔（12）贯通至缸体（6）的配流面，所述配流孔（12）分成数量相同的内侧配流孔和外侧配流孔，所述内侧配流孔和外侧配流孔交替分布在所述配流面上不同的分度圆上；
    其特征在于：所述柱塞式液压马达的配流盘（7）一侧并排分布有第一配流槽（Y1）和第二配流槽（Y2），另一侧分布有第三配流槽（Y3）；其中，所述第一配流槽（Y1）用于与所述内侧配流孔连通，所述第二配流槽（Y2）用于与所述外侧配流孔连通，所述第三配流槽（Y3）用于与所述内侧配流孔和外侧配流孔连通；
    所述柱塞式液压马达的端盖（10）上设有三组油口，三组油口分别与所述第一配流槽（Y1）、第二配流槽（Y2）和第三配流槽（Y3）连通。
  2. 根据权利要求1所述的双进出油口的液压动力装置，其特征在于：所述柱塞式液压马达包括壳体（1）、传动轴（9）、缸体（6）、柱塞（5）、端盖（10）和斜盘（3）；
    所述斜盘（3）与所述壳体（1）固定连接，所述传动轴（9）通过轴承安装在所述壳体（1）与所述端盖（10）围成的空腔中，所述柱塞（5）设置在所述缸体（6）的柱塞孔（11）中，所述柱塞（5）与所述斜盘（3）的斜面抵接，所述传动轴（9）穿过所述斜盘（3）后与所述缸体（6）的传动孔传动连接。
  3. 根据权利要求2所述的双进出油口的液压动力装置，其特征在于：所述缸体（6）的多个所述柱塞（5）通过回程盘压紧在所述斜盘（3）上。
  4. 根据权利要求3所述的双进出油口的液压动力装置，其特征在于：所述柱塞（5）的头部有一滑靴（4），所述缸体（6）上的弹簧通过所述回程盘将所述滑靴（4）压紧在所述斜盘（3）上。
  5. 根据权利要求2所述的双进出油口的液压动力装置，其特征在于：所述配流盘（7）位于所述缸体（6）与所述端盖（10）之间，所述端盖（10）与所述缸体（6）密封连接，以使所述配流盘（7）与所述缸体（6）密封连接。
  6. 根据权利要求2所述的双进出油口的液压动力装置，其特征在于：所述壳体（1）通过安装螺栓（8）与所述端盖（10）连接。
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JPS6223578A (ja) * 1985-07-22 1987-01-31 Mitsubishi Heavy Ind Ltd アキシヤルピストン型流体機械
CN101979875A (zh) * 2010-10-21 2011-02-23 吴赛珍 一种紧凑型高压柱塞变量双泵
CN107762757A (zh) * 2017-11-14 2018-03-06 太原理工大学 一种可降非对称并联配流结构困油噪声轴向柱塞变量泵
CN212250322U (zh) * 2020-08-06 2020-12-29 山河智能装备股份有限公司 一种双进出油口的液压动力装置

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JPS6223578A (ja) * 1985-07-22 1987-01-31 Mitsubishi Heavy Ind Ltd アキシヤルピストン型流体機械
CN101979875A (zh) * 2010-10-21 2011-02-23 吴赛珍 一种紧凑型高压柱塞变量双泵
CN107762757A (zh) * 2017-11-14 2018-03-06 太原理工大学 一种可降非对称并联配流结构困油噪声轴向柱塞变量泵
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