EP3460229B1 - Moteur hydraulique à couple élevé à faible vitesse à courbure interne, avec sortie de couple par rotation de boîtier - Google Patents
Moteur hydraulique à couple élevé à faible vitesse à courbure interne, avec sortie de couple par rotation de boîtier Download PDFInfo
- 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
- Authority
- 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
Links
- 125000006850 spacer group Chemical group 0.000 claims description 11
- 230000000712 assembly Effects 0.000 claims description 10
- 238000000429 assembly Methods 0.000 claims description 10
- 230000009916 joint effect Effects 0.000 claims description 2
- 230000007547 defect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000009193 crawling Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
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
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- 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)
Claims (1)
- Moteur hydraulique à couple élevé à faible vitesse à courbure interne avec sortie de couple par rotation d'un boîtier, comprenant : un bloc de palier gauche (1), un couvercle d'extrémité droit (7), un corps de cylindre (4), un anneau de came à courbure interne (2), une bague-entretoise (3), un carter de distribution d'huile axial (6), et une pluralité d'ensembles pistons (5) agencés radialement, dans lequel
l'anneau de came à courbure interne (2), le bloc de palier gauche (1), la bague-entretoise (3) et le couvercle d'extrémité droit (7) forment un boîtier de moteur ; le boîtier de moteur avec une structure fendue est formé en reliant l'anneau de came à courbure interne (2), le bloc de palier gauche (1), la bague-entretoise (3) et le couvercle d'extrémité droit (7) en série via des boulons à haute résistance ; le moteur dans son ensemble est combiné par le corps de cylindre (4) fixe et le boîtier de moteur rotatif ; le boîtier de moteur tourne autour du corps de cylindre (4), tandis que le corps de cylindre (4) est fixe ; le carter de distribution d'huile axial (6) est agencé axialement sur un côté du corps de cylindre (4), et relié à un passage d'huile du corps de cylindre (4) par l'intermédiaire d'un passage d'huile ; des trous de pistons du corps de cylindre (4) sont conçus en une seule rangée ou une pluralité de rangées suivant l'amplitude d'un couple de sortie, et la pluralité d'ensembles pistons (5) sont agencés uniformément dans les trous de pistons dans une direction radiale autour du corps de cylindre (4) ;
caractérisé en ce que le carter de distribution d'huile axial (6) comprend en outre :un ressort (6-1) configuré dans le carter de distribution d'huile axial, etun piston d'équilibrage (6-2) configuré dans le carter de distribution d'huile axial, dans lequel le piston d'équilibrage (6-2) est cupuliforme, dans lequelle ressort (6-1) est contre un fond de coupe du piston d'équilibrage (6-2), et une surface extérieure du fond de coupe du piston d'équilibrage (6-2) s'ajuste de manière serrée sur le couvercle d'extrémité droit (7) ; sous l'action de forces d'action et de forces de réaction, des forces d'action du ressort (6-1) et du piston d'équilibrage (6-2) amènent des surfaces de contact entre le carter de distribution d'huile axial (6) et le corps de cylindre (4) à être toujours en ajustement serré ; lorsque de l'huile sous pression entre, le carter de distribution d'huile axial (6) s'appuie sur l'action conjointe du ressort (6-1), du piston d'équilibrage (6-2) et de l'huile sous pression pour amener les surfaces de contact entre le carter de distribution d'huile axial (6) et le corps de cylindre (4) à être toujours en ajustement serré ; dans le cas où de l'usure apparaît, les forces d'action du ressort (6-1) et du piston d'équilibrage (6-2) sont utilisées pour amener les surfaces de contact entre le carter de distribution d'huile axial (6) et le corps de cylindre (4) à maintenir un contact étroit, compensant ainsi l'usure, compensant l'usure et la déchirure du carter de distribution d'huile axial (6), réduisant des fuites à l'intérieur du moteur.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2016/000642 WO2018090159A1 (fr) | 2016-11-18 | 2016-11-18 | Moteur hydraulique à couple élevé à faible vitesse à courbure interne, avec sortie de couple par rotation de boîtier |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3460229A1 EP3460229A1 (fr) | 2019-03-27 |
EP3460229A4 EP3460229A4 (fr) | 2019-12-04 |
EP3460229B1 true EP3460229B1 (fr) | 2021-05-05 |
Family
ID=62145927
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16921802.1A Active EP3460229B1 (fr) | 2016-11-18 | 2016-11-18 | Moteur hydraulique à couple élevé à faible vitesse à courbure interne, avec sortie de couple par rotation de boîtier |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3460229B1 (fr) |
WO (1) | WO2018090159A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023111622A1 (fr) * | 2021-12-16 | 2023-06-22 | Danfoss Power Solutions (Jiangsu) Co., Ltd | Agencement de palier pour unités à pistons radiaux |
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)
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 |
-
2016
- 2016-11-18 WO PCT/CN2016/000642 patent/WO2018090159A1/fr unknown
- 2016-11-18 EP EP16921802.1A patent/EP3460229B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
WO2018090159A1 (fr) | 2018-05-24 |
EP3460229A1 (fr) | 2019-03-27 |
EP3460229A4 (fr) | 2019-12-04 |
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