CN109519351B - Plunger return device for crankshaft connecting rod type radial plunger pump - Google Patents
Plunger return device for crankshaft connecting rod type radial plunger pump Download PDFInfo
- Publication number
- CN109519351B CN109519351B CN201811392630.2A CN201811392630A CN109519351B CN 109519351 B CN109519351 B CN 109519351B CN 201811392630 A CN201811392630 A CN 201811392630A CN 109519351 B CN109519351 B CN 109519351B
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- Prior art keywords
- plunger
- shaft
- pin shaft
- face
- pad
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0408—Pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
Abstract
The invention relates to a plunger return device for a crankshaft connecting rod type radial plunger pump. An integrated mechanism is formed by the plunger, the pin shaft, the shaft pad and the lantern ring, when the transmission shaft with the eccentric cam rotates, the motion track of the eccentric cam is transmitted to the plunger, and the motion and automatic return functions of the plunger are realized. The plunger is pressed on the eccentric circle of the crankshaft, and the two rings are sleeved on the end part of the plunger pin shaft, so that the pin shaft is connected with the outer ring of the bearing, the characteristics of small rotational inertia and good transmission performance of the crankshaft connecting rod type radial plunger pump can be exerted, and the problems of complex structure, easy fatigue attenuation of the spring and the like of a transmission spring return device can be solved.
Description
Technical Field
The invention belongs to the field of radial plunger pump structures, and relates to a plunger return device for a crankshaft connecting rod type radial plunger pump.
Background
The radial plunger pump is a device for providing power in a hydraulic system, and realizes oil absorption and oil pressing by changing the volume of a sealed working cavity through the reciprocating motion of a plunger in a cylinder body. The conventional radial plunger pump can be divided into a cylinder rotation type and a crankshaft connecting rod type according to the structural form of a transmission system. The cylinder rotating type structure has the advantages that the cylinder body rotates under the driving of the transmission shaft, the rotational inertia is large, the head of the plunger and the inner wall of the shell slide relatively at a high speed, the pv value of a friction pair is high, and the abrasion problem is serious; the cylinder body with the crankshaft connecting rod type structure does not rotate along with the transmission shaft, so that the rotational inertia of the pump is reduced, but the cylinder body is static, and the plunger cavity is positioned on the outer side of the plunger, so that the cylinder body cannot rotate in the same way as the cylinder, the plunger needs to return by virtue of centrifugal force generated by rotation, the return of the plunger needs to be used as a return device by virtue of a spring, the size and complexity of the pump structure are increased, and an elastic part is frequently compressed during working, so that fatigue damage is easy to occur, and the service life of the.
Disclosure of Invention
The purpose of the invention is as follows: a hybrid housing structure is provided.
The technical scheme of the invention is as follows: a plunger return stroke device for a crankshaft connecting rod type radial plunger pump comprises a plunger 5, a pin shaft 4, a shaft pad 3 and a lantern ring 6;
the lower end face 11 of the shaft pad is an arc surface, the lower end face of the shaft pad is matched with the shape of the outer ring 2 of the bearing of the cam 7, the upper end face 9 of the shaft pad protrudes to form two symmetrical supporting tables 10, and two ends of the pin shaft are respectively supported on the two symmetrical supporting tables; the connecting end of the plunger is rotationally connected with the middle part of the pin shaft; a plunger 5, a pin shaft 4 and a bearing pad 3 form a plunger assembly;
the plunger assemblies are annularly distributed on the outer ring of the cam bearing, and the inner ring surface of the lantern ring and the outer ring of the cam bearing are used for radially limiting the supporting tables of all the plunger assemblies and/or the end part of the pin shaft, so that the cam can drive all the plunger assemblies to be integrally linked during movement.
Preferably, the axial section of the end of the pin shaft is a circular segment, forming a shaft segment 15, and the supporting surface of the supporting platform is an arc surface 12, and the outer axial surface 13 of the end of the pin shaft is supported on the arc surface of the supporting platform.
Preferably, the upper end surface of the supporting platform is an outer arc surface, the outer arc surface is matched with the inner annular surface of the lantern ring, and the end part of the pin shaft does not exceed the upper end surface of the supporting platform when being supported on the supporting surface.
Preferably, the shaft section of the end part of the pin shaft is a circular segment to form a shaft segment; the upper end face and the shaft notch face of the supporting table are both outer arc faces 16 and 14, and the outer arc faces are matched with the inner ring face of the lantern ring.
Preferably, the coupling end of the plunger is a circular sleeve or a C-shaped sleeve, and the radian of the C-shaped opening is less than pi.
Preferably, the supporting platform is provided with a shaft hole, two ends of the pin shaft are respectively supported in the shaft hole, the supporting surface of the supporting platform is an arc surface 12, and the arc surface is matched with the inner annular surface of the lantern ring.
Preferably, the inner ring surface of the lantern ring is provided with a plurality of arc grooves, the supporting surface of the supporting table is an arc surface 12, the arc grooves of the lantern ring and the arc surface of the supporting surface are buckled to form a cylindrical cavity, and two ends of the pin shaft are respectively supported in the cylindrical cavity.
The invention has the beneficial effects that: the invention adopts a return device consisting of a pin, a shaft pad and a plunger with special structures to replace a spring return device, and solves the problem of performance attenuation of an elastic element after frequent compression.
The plunger return device of the invention replaces a spring used for return of a conventional radial plunger pump, and the pressure-increasing valve can be directly arranged at the bottom of the plunger, thereby shortening the radial size of the pump.
According to the plunger return device, the plunger and the eccentric cam are connected together by using the two ring sleeves, so that the plunger moves more stably in the radial direction and has better transmission performance in the reciprocating motion process;
the plunger return device has the structural characteristic of small axial size, shortens the size of the transmission shaft, increases the strength and rigidity of the shaft, and simultaneously makes a mechanical system more compact in axial direction;
the plunger return device has the structural characteristic of small axial size, shortens the size of the transmission shaft, increases the strength and rigidity of the shaft, and simultaneously makes a mechanical system more compact in axial direction.
Drawings
FIG. 1 is an exploded view of the present invention;
FIG. 2 is an assembly schematic of the present invention;
FIG. 3 is a schematic view of the construction of the pillow block;
FIG. 4 is a schematic structural view of a pin;
FIGS. 5a-5b are schematic views of a fit between a bearing pad and a pin;
FIGS. 6a-6c are schematic structural views of the second embodiment;
wherein: 1-rotating shaft, 2-cam bearing, 3-shaft pad, 4-pin shaft, 5-plunger, 6-lantern ring, 7-cam, 8-plunger cylinder, 9-upper end surface of shaft pad, 10-supporting table, 11-lower end surface of shaft pad, 12-arc surface, outer shaft surface 13, 14-outer arc surface, 15-shaft notch and 16-outer arc surface.
Detailed Description
Referring to FIGS. 1-5b, the first embodiment,
A plunger return stroke device for a crankshaft connecting rod type radial plunger pump comprises a plunger 5, a pin shaft 4, a shaft pad 3 and a lantern ring 6;
the lower end face 11 of the shaft pad is an arc surface, the lower end face of the shaft pad is matched with the shape of an outer ring of a bearing of the cam 7, the upper end face 9 of the shaft pad protrudes to form two symmetrical supporting tables 10, and two ends of the pin shaft are respectively supported on the two symmetrical supporting tables; the connecting end of the plunger is rotationally connected with the middle part of the pin shaft; a plunger 5, a pin shaft 4 and a bearing pad 3 form a plunger assembly;
the plunger assemblies are annularly distributed on the outer ring of the cam bearing, and the inner ring surface of the lantern ring and the outer ring of the cam bearing limit the supporting tables of all the plunger assemblies and/or the end part of the pin shaft in the radial direction, so that the cam can drive all the plunger assemblies to be integrally linked during movement;
the connecting end of the plunger is a circular sleeve or a C-shaped sleeve, and the radian of a C-shaped opening is less than pi; the supporting platform is provided with a shaft hole, two ends of the pin shaft are respectively supported in the shaft hole, the supporting surface of the supporting platform is an arc surface 12, and the arc surface is matched with the inner annular surface of the lantern ring.
6a-6c, example II
A plunger return stroke device for a crankshaft connecting rod type radial plunger pump comprises a plunger 5, a pin shaft 4, a shaft pad 3 and a lantern ring 6;
the lower end face 11 of the shaft pad is an arc surface, the lower end face of the shaft pad is matched with the shape of an outer ring of a bearing of the cam 7, the upper end face 9 of the shaft pad protrudes to form two symmetrical supporting tables 10, and two ends of the pin shaft are respectively supported on the two symmetrical supporting tables; the connecting end of the plunger is rotationally connected with the middle part of the pin shaft; a plunger 5, a pin shaft 4 and a bearing pad 3 form a plunger assembly;
the plunger assemblies are annularly distributed on the outer ring of the cam bearing, and the inner ring surface of the lantern ring and the outer ring of the cam bearing limit the supporting tables of all the plunger assemblies and/or the end part of the pin shaft in the radial direction, so that the cam can drive all the plunger assemblies to be integrally linked during movement;
the connecting end of the plunger is a circular sleeve or a C-shaped sleeve, and the radian of a C-shaped opening is less than pi; the inner ring surface of the lantern ring is provided with a plurality of arc grooves, the supporting surface of the supporting platform is an arc surface 12, the arc grooves of the lantern ring and the arc surface of the supporting surface are buckled to form a cylindrical cavity, and two ends of the pin shaft are respectively supported in the cylindrical cavity.
Claims (5)
1. A plunger return stroke device for a crankshaft connecting rod type radial plunger pump comprises a plunger, a pin shaft, a shaft pad and a lantern ring;
the lower end face of the shaft pad is an arc face, the lower end face of the shaft pad is matched with the outer ring of the cam bearing in shape, the upper end face of the shaft pad protrudes to form two symmetrical supporting tables, and two ends of the pin shaft are respectively supported on the two symmetrical supporting tables; the connecting end of the plunger is rotationally connected with the middle part of the pin shaft; a plunger, a pin shaft and a shaft pad form a plunger assembly;
the plunger assemblies are annularly distributed on the outer ring of the cam bearing, and the inner ring surface of the lantern ring and the outer ring of the cam bearing limit the supporting tables of all the plunger assemblies and/or the end part of the pin shaft in the radial direction, so that the cam can drive all the plunger assemblies to be integrally linked during movement;
the upper end surface of the supporting platform is an outer arc surface, and the outer arc surface is matched with the inner annular surface of the lantern ring;
the shaft section of the end part of the pin shaft is a circular segment to form a shaft segment, the supporting surface of the supporting platform is an arc surface, and the outer shaft surface of the end part of the pin shaft is supported on the arc surface of the supporting platform.
2. The plunger return means for a crankshaft connecting rod type radial plunger pump as claimed in claim 1, wherein: the shaft section of the end part of the pin shaft is a circular segment to form a shaft segment; the upper end face and the shaft notch face of the supporting table are both outer arc faces (16,14), and the outer arc faces are both matched with the inner ring face of the lantern ring.
3. A plunger return means for a crankshaft connecting rod type radial plunger pump according to claim 1 or 2, characterized in that: the connecting end of the plunger is a circular sleeve or a C-shaped sleeve, and the radian of a C-shaped opening is less than pi.
4. A plunger return stroke device for a crankshaft connecting rod type radial plunger pump comprises a plunger, a pin shaft, a shaft pad and a lantern ring;
the lower end face of the shaft pad is an arc face, the lower end face of the shaft pad is matched with the outer ring of the cam bearing in shape, the upper end face of the shaft pad protrudes to form two symmetrical supporting tables, and two ends of the pin shaft are respectively supported on the two symmetrical supporting tables; the connecting end of the plunger is rotationally connected with the middle part of the pin shaft; a plunger, a pin shaft and a shaft pad form a plunger assembly;
the plunger assemblies are annularly distributed on the outer ring of the cam bearing, and the inner ring surface of the lantern ring and the outer ring of the cam bearing limit the supporting tables of all the plunger assemblies and/or the end part of the pin shaft in the radial direction, so that the cam can drive all the plunger assemblies to be integrally linked during movement;
the inner ring surface of the lantern ring is provided with a plurality of arc grooves, the supporting surface of the supporting platform is an arc surface, the arc grooves of the lantern ring and the arc surface of the supporting surface are buckled to form a cylindrical cavity, and two ends of the pin shaft are respectively supported in the cylindrical cavity.
5. The plunger return means for a crankshaft connecting rod type radial plunger pump as claimed in claim 4, wherein: the connecting end of the plunger is a circular sleeve or a C-shaped sleeve, and the radian of a C-shaped opening is less than pi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811392630.2A CN109519351B (en) | 2018-11-21 | 2018-11-21 | Plunger return device for crankshaft connecting rod type radial plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811392630.2A CN109519351B (en) | 2018-11-21 | 2018-11-21 | Plunger return device for crankshaft connecting rod type radial plunger pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109519351A CN109519351A (en) | 2019-03-26 |
| CN109519351B true CN109519351B (en) | 2020-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811392630.2A Active CN109519351B (en) | 2018-11-21 | 2018-11-21 | Plunger return device for crankshaft connecting rod type radial plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109519351B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2257025A1 (en) * | 1974-01-08 | 1975-08-01 | Verlinde Sa | Radial cylinder hydraulic motor - flared portions of pistons interlock to form circle around crankshaft |
| US3968736A (en) * | 1973-05-24 | 1976-07-13 | Felice Pecorari | Radial fluid-pressure apparatus |
| CN2202803Y (en) * | 1994-09-19 | 1995-07-05 | 霍启顺 | Radial plunger pump |
| CN1193805A (en) * | 1997-03-13 | 1998-09-23 | 中华映管股份有限公司 | Positioning structure for assembling eccentric polarizing sheet of electron gun of cathode ray tube |
| CN2758516Y (en) * | 2004-12-17 | 2006-02-15 | 青岛威能动力有限公司 | Device of mechanical energy converting into fluid pressure energy |
| CN104005924A (en) * | 2013-02-25 | 2014-08-27 | 白巨章 | High-power radial plunger pump |
-
2018
- 2018-11-21 CN CN201811392630.2A patent/CN109519351B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3968736A (en) * | 1973-05-24 | 1976-07-13 | Felice Pecorari | Radial fluid-pressure apparatus |
| FR2257025A1 (en) * | 1974-01-08 | 1975-08-01 | Verlinde Sa | Radial cylinder hydraulic motor - flared portions of pistons interlock to form circle around crankshaft |
| CN2202803Y (en) * | 1994-09-19 | 1995-07-05 | 霍启顺 | Radial plunger pump |
| CN1193805A (en) * | 1997-03-13 | 1998-09-23 | 中华映管股份有限公司 | Positioning structure for assembling eccentric polarizing sheet of electron gun of cathode ray tube |
| CN2758516Y (en) * | 2004-12-17 | 2006-02-15 | 青岛威能动力有限公司 | Device of mechanical energy converting into fluid pressure energy |
| CN104005924A (en) * | 2013-02-25 | 2014-08-27 | 白巨章 | High-power radial plunger pump |
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| Publication number | Publication date |
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| CN109519351A (en) | 2019-03-26 |
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| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Yibao Inventor after: Bai Haipeng Inventor after: Cheng Yong Inventor after: Wu Zhuangfeng Inventor after: Qiao Yun Inventor after: Li Yang Inventor before: Zhang Yibao |
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