EP3460229B1 - Internally curved low-speed high-torque hydraulic motor with torque being output by means of rotation of housing - Google Patents

Internally curved low-speed high-torque hydraulic motor with torque being output by means of rotation of housing Download PDF

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Publication number
EP3460229B1
EP3460229B1 EP16921802.1A EP16921802A EP3460229B1 EP 3460229 B1 EP3460229 B1 EP 3460229B1 EP 16921802 A EP16921802 A EP 16921802A EP 3460229 B1 EP3460229 B1 EP 3460229B1
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EP
European Patent Office
Prior art keywords
cylinder body
plunger
oil distribution
axial oil
distribution pan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16921802.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3460229A4 (en
EP3460229A1 (en
Inventor
Shuangzhen SUN
Hongge DENG
Li Han
Xijun ZHENG
Lu Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qinhuangdao Zenmax Hydraulic Equipments Co Ltd
Original Assignee
Qinhuangdao Zenmax Hydraulic Equipments Co Ltd
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Publication date
Application filed by Qinhuangdao Zenmax Hydraulic Equipments Co Ltd filed Critical Qinhuangdao Zenmax Hydraulic Equipments Co Ltd
Publication of EP3460229A1 publication Critical patent/EP3460229A1/en
Publication of EP3460229A4 publication Critical patent/EP3460229A4/en
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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
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/047—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement the pistons co-operating with an actuated element at the outer ends of the cylinders
    • F03C1/0474—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement the pistons co-operating with an actuated element at the outer ends of the cylinders with two or more radial piston/cylinder units in series
    • 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
    • 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
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/0403—Details, component parts specially adapted of such engines
    • F03C1/0435—Particularities relating to the distribution members

Definitions

  • the present invention relates to a low-speed high-torque hydraulic motor in the field of hydraulic motors, in particular to an internally curved low-speed high-torque hydraulic motor with torque being output by means of the rotation of a housing.
  • the wheel drive hydraulic motor used in the engineering vehicle has two structures: one structure is a planetary reduction gearbox with a plunger hydraulic motor for driving the rotation of a housing; and the other is an internally curved hydraulic motor with a rotatable cylinder body (spindle) and a fixed motor housing.
  • the first structure is not conducive to market competition due to its complicated structure, low efficiency, low speed crawling, and high failure rate; the second structure is an internally curved hydraulic motor with a rotatable cylinder body (spindle) and a fixed motor housing, thereby occupying a large space and having limited application in engineering vehicles. Therefore, how to increase the efficiency, decrease the failure rate, reduce the occupancy space and make the layout of the main machine more reasonable by improving the structure on the basis of ensuring the driving performance of the vehicle is a very meaningful subject in the art.
  • a Viking motor In the industries of ships, lifting equipment, and the like, a Viking motor is commonly used.
  • the Viking motor also has the structure of a rotatable housing, but it has a different oil distribution mode in comparison with the internally curved motor with a rotatable housing.
  • the Viking motor uses a radial oil distribution mode.
  • the oil distribution shaft seal ring or clearance seal may be worn out, thus causing failure of compensation after the clearance is large, and causing internal leakage and failure of normal operation.
  • the rated speed In the case of the same displacement and torque, the rated speed is low, and the internally curved hydraulic motor with a rotatable housing can be widely used in industries such as travelling construction machinery, ships, lifting equipment, etc.
  • German patent publication DE 20 04 773 A1 discloses a hydraulic motor with two rows of radially arranged pistons and a guide which is designed so that the dimensions of the hydraulic motor are significantly reduced and its structure can be simplified. Leakage of fluid will increase when wear and tear of the distributor and the cylinder of the hydraulic motor occur after long-term use. How to avoid or reduce leakages is not discussed in this publication.
  • the main object of the present invention is to overcome the defects of the existing planetary reduction gearbox with a plunger hydraulic motor for driving the rotation of a housing, such as low efficiency, low-speed crawling, heavy weight, large size, and the like, and to overcome the defects of the internally curved hydraulic motor with a rotatable cylinder body spindle for outputting and a fixed housing, such as occupying a large space and having limited application.
  • the present invention provides a novel structure of an internally curved low-speed high-torque hydraulic motor with torque being output by means of the rotation of a housing.
  • the technical problem to be solved is to improve the structure so as to easily implement the technical performance required for the wheel driving of the engineering vehicle, thereby reducing defects and deficiencies caused by the structure of the wheel-driving traveling hydraulic motor in the existing engineering vehicle, which is quite suitable for practical use.
  • An internally curved low-speed high-torque hydraulic motor with torque being output by means of the rotation of a housing composed of a left bearing block, a right end cover, a spacer ring, a cylinder body, an internally curved cam ring, an axial oil distribution pan and a plurality of radially arranged plunger assemblies, wherein the internally curved cam ring, the left bearing block, the spacer ring and the right end cover form a motor housing; the motor housing with a split structure is formed by connecting the internally curved cam ring, the left bearing block, the spacer ring and the right end cover in series via high-strength bolts; the motor as a whole is combined by the fixed cylinder body and the rotatable motor housing; the motor housing rotates around the cylinder body, while the cylinder body is fixed; the axial oil distribution pan is axially arranged on one side of the cylinder body, and
  • the plurality of plunger assemblies are uniformly arranged in a radial direction around the cylinder body.
  • the axial oil distribution pan is provided therein with a spring and a balancing plunger, the balancing plunger is cup-shaped, the spring is against a cup bottom of the balancing plunger, and an outer surface of the cup bottom of the balancing plunger is in tight fit with the right end cover; under the action of acting forces and reacting forces, acting forces of the spring and the balancing plunger cause contact surfaces between the axial oil distribution pan and the cylinder body to be in close contact; when pressurized oil enters, the axial oil distribution pan relies on the acting forces of the spring and the balancing plunger together with the action of the pressurized oil to cause the contact surfaces between the axial oil distribution pan and the cylinder body to be always in tight fit; in the case of wear, the acting forces of the spring and the balancing plunger can be used to cause the contact surfaces between the axial oil distribution pan and the cylinder body to maintain
  • the present invention has obvious advantages and beneficial effects.
  • the present invention has at least the following advantages:
  • Fig. 1 is a structural schematic diagram of an internally curved low-speed high-torque hydraulic motor with torque being output by means of the rotation of a housing according to the present invention.
  • Fig. 2 is a left view of Fig. 1 .
  • 1 left bearing block 2: internally curved cam ring 3: spacer ring 4: cylinder body 5: plunger assembly 6: axial oil distribution pan 6-1: spring 6-2: balancing plunger 7: right end cover
  • Fig. 3 is a partial enlarged diagram of Fig. 1 .
  • an internally curved low-speed high-torque hydraulic motor with torque being output by means of the rotation of a housing is mainly composed of a cylinder body 4, a left bearing block 1, an internally curved cam ring 2, a spacer ring 3, an axial oil distribution pan 6, a right end cover 7, and a plurality of radially arranged plunger assemblies 5, wherein the internally curved cam ring 2, the left bearing block 1, the spacer ring 3 and the right end cover 7 form a motor housing; the motor housing with a split structure is formed by connecting the internally curved cam ring 2, the left bearing block 1, the spacer ring 3 and the right end cover 7 in series via high-strength bolts.
  • the motor as a whole is combined by the fixed cylinder body 4 and the rotatable motor housing; the motor housing rotates around the cylinder body 4, while the cylinder body 4 is fixed.
  • Plunger holes of the cylinder body 4 may be designed in a single row or a plurality of rows depending on the magnitude of output torque, and the plurality of plunger assemblies 5 are uniformly arranged in the plunger holes in a radial direction around the cylinder body 4.
  • the axial oil distribution pan 6 is axially arranged on one side of the cylinder body 4, and connected to an oil passage of the cylinder body 4 through an oil passage.
  • the axial oil distribution pan 6 is provided therein with a spring 6-1 and a balancing plunger 6-2, wherein the balancing plunger 6-2 is cup-shaped, the spring 6-1 is against a cup bottom of the balancing plunger 6-2, and an outer surface of the cup bottom of the balancing plunger 6-2 is in tight fit with the right end cover 7, thus under the action of acting forces and reacting forces, the spring force of the spring 6-1 can be used to cause the contact surfaces between the axial oil distribution pan 6 and the cylinder body 4 to be always in tight fit.
  • both an oil inlet hole and an oil return hole are arranged on one end of the cylinder body 4; oil enters the axial oil distribution pan 6 from the center of the cylinder body 4 in the direction shown in the figures, and is distributed to the working chambers of the plunger assemblies 5 which are radially uniformly arranged in the cylinder body 4, and pushes the plunger assemblies 5 to move linearly. Under the action of pressure, the plunger assemblies 5 push the motor housing, which is composed of the internally curved cam ring 2, the left bearing block 1, the spacer ring 3 and the right end cover 7, to rotate.
  • the axial oil distribution pan 6 relies on the acting forces of the spring 6-1 and the balancing plunger 6-2 to cause the contact surfaces between the axial oil distribution pan 6 and the cylinder body 4 to be always in tight fit; when pressurized oil enters, the axial oil distribution pan 6 relies on the joint action of the spring 6-1, the balancing plunger 6-2 and the pressurized oil to cause the contact surfaces between the axial oil distribution pan 6 and the cylinder body 4 to be in tight fit; in the case where wear occurs on the contact surfaces between the axial oil distribution pan 6 and the cylinder body 4, the acting forces of the spring 6-1 and the balancing plunger 6-2 are used to cause the axial oil distribution pan 6 and the cylinder body 4 to maintain close contact, thereby compensating for the wear, compensating for the wear of the axial oil distribution pan 6, reducing internal leakage of the motor and prolonging the service life of the motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Motors (AREA)
EP16921802.1A 2016-11-18 2016-11-18 Internally curved low-speed high-torque hydraulic motor with torque being output by means of rotation of housing Active EP3460229B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2016/000642 WO2018090159A1 (zh) 2016-11-18 2016-11-18 一种壳体旋转输出扭矩的内曲线低速大扭矩液压马达

Publications (3)

Publication Number Publication Date
EP3460229A1 EP3460229A1 (en) 2019-03-27
EP3460229A4 EP3460229A4 (en) 2019-12-04
EP3460229B1 true EP3460229B1 (en) 2021-05-05

Family

ID=62145927

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16921802.1A Active EP3460229B1 (en) 2016-11-18 2016-11-18 Internally curved low-speed high-torque hydraulic motor with torque being output by means of rotation of housing

Country Status (2)

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EP (1) EP3460229B1 (zh)
WO (1) WO2018090159A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023111622A1 (en) * 2021-12-16 2023-06-22 Danfoss Power Solutions (Jiangsu) Co., Ltd Bearing arrangement for radial piston units
CN115618656B (zh) * 2022-12-15 2023-03-31 浙江大学 一种多作用液压马达盘配流系统自补偿结构设计方法
CN115875186B (zh) * 2023-02-27 2023-04-28 太原科技大学 一种集成共转子结构高扭矩密度内曲线液压马达

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2004773C3 (de) * 1970-02-03 1975-11-13 Institut Gornogo Dela Imeni A.A. Skoschinskogo, Ljubertsy (Sowjetunion) Mehrfach wirkender Radialkolben-Hydromotor
FI64840C (fi) * 1979-08-01 1984-01-10 Partek Ab Hydraulisk motor
GB2086991A (en) * 1980-08-26 1982-05-19 Staffa Products Ltd Improvements in and relating to hydraulic motors
CN2619064Y (zh) * 2003-01-16 2004-06-02 株洲煤矿机械厂 壳转式内曲线液压马达
FI118233B (fi) * 2003-04-01 2007-08-31 Sampo Hydraulics Oy Radiaalimäntähydraulimoottori ja menetelmä radiaalimäntähydraulimoottorin säädössä
CN102493913B (zh) * 2011-12-13 2015-05-13 宁波德辰液压科技有限公司 壳转式内曲线径向柱塞液压马达
CN202326004U (zh) * 2011-12-13 2012-07-11 宁波德辰液压科技有限公司 壳转式内曲线径向柱塞液压马达
FR3024503B1 (fr) * 2014-07-31 2019-06-21 Poclain Hydraulics Industrie Dispositif de carter de distribution pour une machine hydraulique

Also Published As

Publication number Publication date
EP3460229A4 (en) 2019-12-04
EP3460229A1 (en) 2019-03-27
WO2018090159A1 (zh) 2018-05-24

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