CN105715448A - Oval plunger body structure based on dynamic pressure balance - Google Patents
Oval plunger body structure based on dynamic pressure balance Download PDFInfo
- Publication number
- CN105715448A CN105715448A CN201610289068.5A CN201610289068A CN105715448A CN 105715448 A CN105715448 A CN 105715448A CN 201610289068 A CN201610289068 A CN 201610289068A CN 105715448 A CN105715448 A CN 105715448A
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- China
- Prior art keywords
- plunger
- structure based
- body structure
- cylinder
- dynamic pressure
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- 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.)
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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
- F03C1/0602—Component parts, details
- F03C1/0605—Adaptations of pistons
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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
The invention discloses an oval plunger body structure based on dynamic pressure balance. The oval plunger body structure based on dynamic pressure balance comprises a plunger; a bulb is arranged at the end of the plunger; the surface of the plunger is an oval arc face; the position, with the maximum diameter, of the plunger is located at the middle position of the effective cylinder reserving length of the plunger; and the effective cylinder reserving length of the plunger is length of the portion, capable of being reserved in a cylinder hole at two extreme positions where the plunger stretches out of and shrinks into a cylinder body, of the plunger. Friction force generated when the plunger moves in cylinder space is reduced according to the dynamic pressure principle, friction loss is reduced through dynamic pressure supporting, the work efficiency of a motor is greatly improved, leakage is reduced, and the mechanical efficiency of the motor is remarkably improved.
Description
Technical field
The present invention relates to hydraulic test parts technical field, particularly to a kind of ovallized column cock body structure based on kinetic pressure balancing.
Background technology
Plunger is the kernel component in hydraulic motor, cam-type axial piston motor includes main shaft, oil distribution casing, cylinder body, plunger, swash plate and piston shoes, main shaft traverse oil distribution casing, cylinder body and swash plate, plunger is loaded in the plunger hole of cylinder body, the bulb end of plunger is equipped with the piston shoes contacted with swash plate, the front end of piston shoes is provided with the spherical concave surface that the bulb with plunger coordinates, the rear end of piston shoes is provided with the piston shoes chamber of cylinder, it is provided with through hole between piston shoes chamber with spherical concave surface to be connected, what piston shoes rear end contacted with swash plate is disk sealing face, it is perpendicular to level oil liquid pressure to the left suffered by the oil liquid pressure sum being perpendicular to piston shoes chamber end face suffered by the oil liquid pressure in this face and piston shoes chamber level component to the right along plunger axis direction and plunger suffered by disk sealing face to balance each other.Plunger cylinder friction pair in hydraulic motor is one of main friction pairs producing frictional force in hydraulic motor, if the frictional force that plunger moves in plunger hole can be reduced, reduces friction loss, just can be greatly improved the work efficiency of motor.
Summary of the invention
The present invention is in order to make up the deficiencies in the prior art, it is provided that a kind of can reduce the ovallized column cock body structure based on kinetic pressure balancing of frictional force between plunger and plunger hole.
For achieving the above object, the present invention adopts following technical proposals: a kind of ovallized column cock body structure based on kinetic pressure balancing, including plunger, described plunger end is provided with bulb, the surface of described plunger is elliptical arc surface, and the position that the maximum gauge place of plunger contacts with plunger aperture when being positioned at the extreme position that plunger effectively stays the plunger of cylinder length to stretch out, the cylinder length of effectively staying of described plunger is the length that plunger can be retained in the part of cylinder holes when being positioned at the extreme position stretching out cylinder body.
Further, described plunger maximum gauge and minimum diameter difference are not more than 0.005mm.
Preferably, described plunger maximum gauge and minimum diameter difference are 0.001mm.
Preferably, described plunger maximum gauge and minimum diameter difference are 0.003mm.
Preferably, described plunger maximum gauge and minimum diameter difference are 0.005mm.
During work, hydraulic oil enters the gap between plunger oval surface and cylinder holes inwall and forms slip oil film, makes plunger be in a kind of sliding friction state in cylinder holes all the time, and ensures plunger balance in cylinder holes under the effect of the pressure.
The invention has the beneficial effects as follows: reduce the plunger frictional force in cylinder aerial sports by dynamic pressure principle, rely on dynamic pressure to support and reduce friction loss, substantially increase the work efficiency of motor, reduce and reveal, significantly improve the mechanical efficiency of motor.
Accompanying drawing explanation
Fig. 1 is piston structure schematic diagram.
Wherein 1. plunger, 2. bulb.
Detailed description of the invention
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Embodiment one
A kind of ovallized column cock body structure based on kinetic pressure balancing as shown in Figure 1, including plunger 1, described plunger 1 end is provided with bulb 2, the surface of plunger 1 is elliptical arc surface, and the maximum gauge place of plunger 1 is positioned at plunger 1 and effectively stays the middle position of cylinder length, this position is exactly the position that when plunger 1 stretches out cylinder body extreme position, plunger 1 surface contacts with plunger aperture, plunger 1 effectively stay cylinder length be plunger 1 be positioned at extended and retracted cylinder body two extreme positions time all can be retained in the length of part of cylinder holes；Plunger 1 maximum gauge and minimum diameter difference are 0.001mm.
Embodiment two
A kind of ovallized column cock body structure based on kinetic pressure balancing, is 0.003mm including plunger 1, plunger 1 maximum gauge and minimum diameter difference.The other technologies feature of the present embodiment is identical with embodiment one.
Embodiment three
A kind of ovallized column cock body structure based on kinetic pressure balancing, is 0.005mm including plunger 1, plunger 1 maximum gauge and minimum diameter difference.The other technologies feature of the present embodiment is identical with embodiment one.
The specific embodiment of the present invention is described in conjunction with accompanying drawing although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme, those skilled in the art need not pay various amendments or deformation that creative work can make still within protection scope of the present invention.
Claims (5)
1. the ovallized column cock body structure based on kinetic pressure balancing, including plunger, described plunger end is provided with bulb, it is characterized in that: the surface of described plunger is elliptical arc surface, and the position that the maximum gauge place of plunger contacts with plunger aperture when being positioned at the extreme position that plunger effectively stays the plunger of cylinder length to stretch out, the cylinder length of effectively staying of described plunger is the length that plunger can be retained in the part of cylinder holes when being positioned at the extreme position stretching out cylinder body.
2. the ovallized column cock body structure based on kinetic pressure balancing as claimed in claim 1, it is characterised in that: described plunger maximum gauge and minimum diameter difference are not more than 0.005mm.
3. the ovallized column cock body structure based on kinetic pressure balancing as claimed in claim 2, it is characterised in that: described plunger maximum gauge and minimum diameter difference are 0.001mm.
4. the ovallized column cock body structure based on kinetic pressure balancing as claimed in claim 2, it is characterised in that: described plunger maximum gauge and minimum diameter difference are 0.003mm.
5. the ovallized column cock body structure based on kinetic pressure balancing as claimed in claim 2, it is characterised in that: described plunger maximum gauge and minimum diameter difference are 0.005mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610289068.5A CN105715448A (en) | 2016-05-04 | 2016-05-04 | Oval plunger body structure based on dynamic pressure balance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610289068.5A CN105715448A (en) | 2016-05-04 | 2016-05-04 | Oval plunger body structure based on dynamic pressure balance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105715448A true CN105715448A (en) | 2016-06-29 |
Family
ID=56161938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610289068.5A Pending CN105715448A (en) | 2016-05-04 | 2016-05-04 | Oval plunger body structure based on dynamic pressure balance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105715448A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420296A (en) * | 2017-08-16 | 2017-12-01 | 潍柴动力股份有限公司 | Plunger and cam-type axial piston pump for cam-type axial piston pump |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10266970A (en) * | 1997-03-21 | 1998-10-06 | Komatsu Ltd | Piston of swash plate type piston pump/motor |
| KR100598766B1 (en) * | 2004-11-08 | 2006-07-13 | 한국기계연구원 | Hydraulic piston pump and motor |
| US20120079936A1 (en) * | 2009-04-01 | 2012-04-05 | Purdue Research Foundation | Positive displacement machine piston with wavy surface form |
| CN203906264U (en) * | 2014-05-23 | 2014-10-29 | 柳州柳工液压件有限公司 | Plunger |
| CN104781551A (en) * | 2013-04-16 | 2015-07-15 | 川崎重工业株式会社 | Piston for axial piston pump motor, cylinder block for axial piston pump motor, and axial piston pump motor |
| KR20150095421A (en) * | 2014-02-13 | 2015-08-21 | 주식회사 두산 | Piston of Hydraulic Motor or Pump |
| CN205638783U (en) * | 2016-05-04 | 2016-10-12 | 青岛力克川液压机械有限公司 | Ovallized column cock body structure based on dynamic pressure is balanced |
-
2016
- 2016-05-04 CN CN201610289068.5A patent/CN105715448A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10266970A (en) * | 1997-03-21 | 1998-10-06 | Komatsu Ltd | Piston of swash plate type piston pump/motor |
| KR100598766B1 (en) * | 2004-11-08 | 2006-07-13 | 한국기계연구원 | Hydraulic piston pump and motor |
| US20120079936A1 (en) * | 2009-04-01 | 2012-04-05 | Purdue Research Foundation | Positive displacement machine piston with wavy surface form |
| CN104781551A (en) * | 2013-04-16 | 2015-07-15 | 川崎重工业株式会社 | Piston for axial piston pump motor, cylinder block for axial piston pump motor, and axial piston pump motor |
| KR20150095421A (en) * | 2014-02-13 | 2015-08-21 | 주식회사 두산 | Piston of Hydraulic Motor or Pump |
| CN203906264U (en) * | 2014-05-23 | 2014-10-29 | 柳州柳工液压件有限公司 | Plunger |
| CN205638783U (en) * | 2016-05-04 | 2016-10-12 | 青岛力克川液压机械有限公司 | Ovallized column cock body structure based on dynamic pressure is balanced |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420296A (en) * | 2017-08-16 | 2017-12-01 | 潍柴动力股份有限公司 | Plunger and cam-type axial piston pump for cam-type axial piston pump |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160629 |
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| WD01 | Invention patent application deemed withdrawn after publication |