CN106438336B - A kind of plunger auxiliary structure for super-pressure axial direction oblique plate plunger pump - Google Patents
A kind of plunger auxiliary structure for super-pressure axial direction oblique plate plunger pump Download PDFInfo
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- CN106438336B CN106438336B CN201610962957.3A CN201610962957A CN106438336B CN 106438336 B CN106438336 B CN 106438336B CN 201610962957 A CN201610962957 A CN 201610962957A CN 106438336 B CN106438336 B CN 106438336B
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- plunger
- hole
- pump
- aperture
- clamp nut
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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
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
The present invention relates to a kind of plunger auxiliary structures for ultrahigh pressure axial plunger pump, including cylinder body, in opening up the first plunger hole for installing the first plunger and the second plunger hole for installing the second plunger in the cylinder body respectively, one end that the first plunger protrudes into the first plunger hole protrudes into the one end fits of the first plunger hole by clamp nut and the second plunger.It is the configuration of the present invention is simple, easy to use, it is not acted on by or by minimum normal pressure when second plunger compresses working media in the second plunger hole, and the normal force that swash plate acts on the first plunger spheric end is acted on the normal direction dynamic balance of the first plunger by the first plunger hole, since the diameter of the first plunger is greater than the diameter of small plunger, therefore the normal pressure between the first plunger, the first plunger hole can be reduced to tolerable injury level, ensure that the first plunger pair, the rate of depreciation of the second plunger pair are controlled in normal level.
Description
Technical field
The present invention relates to Fluid-transmissions and hydraulic transmission technology field, more particularly to one kind to be used for ultrahigh pressure axial plunger pump
Plunger auxiliary structure.
Background technique
Much application needs the maximum working pressure of hydraulic pump to can achieve super-pressure grade to engineering Hydraulic Field, and axial
Plunger pump is the ideal structure that hydraulic pump realizes super-pressure output, and the axial plunger pump service life depends primarily on three big keys and rubs
It wipes the secondary service life, plunger/cylinder holes friction pair is one of three big crucial friction pairs of axial plunger pump.Plunger pair is axial plunger pump
Core component, existing plunger auxiliary structure as shown in Figure 1, include plunger 1 and cylinder bore 2, when plunger 1 compresses in cylinder bore 2
When working media, since swash plate has certain inclination angle, there are normal force between plunger 1 and cylinder bore 2, outer plunger surface and cylinder at this time
Internal surface of hole constitutes the friction pair under normal pressure effect, this will lead to the abrasion of plunger and cylinder bore, reduce the appearance of pump
Product efficiency, restricts the service life of pump.The operating pressure of normal pressure and axial plunger pump between plunger and cylinder bore is positively correlated, because
This is for ultrahigh pressure axial plunger pump, if plunger and cylinder bore rate of depreciation can be significantly high using traditional plunger auxiliary structure
In common axial plunger pump, this to the reliability of pump and is extremely disadvantageous for the service life.
Summary of the invention
The applicant is directed to above-mentioned existing issue, has carried out Improvement, provides a kind of for ultrahigh pressure axial plunger pump
Plunger auxiliary structure, the normal pressure between ultrahigh pressure axial plunger pump plunger and cylinder body can be reduced, being reduced to it can
Receiving is horizontal so that the plunger and cylinder bore rate of depreciation of ultrahigh pressure axial plunger pump are reduced to tolerable injury level, raising superelevation
Press the service life of axial plunger pump.
The technical solution adopted in the present invention is as follows:
A kind of plunger auxiliary structure for ultrahigh pressure axial plunger pump, including cylinder body, in opening up use respectively in the cylinder body
In the first plunger hole and the second plunger hole for installing the second plunger of installing the first plunger, the first plunger protrudes into the first plunger
The one end in hole protrudes into the one end fits of the first plunger hole by clamp nut and the second plunger.
Its further technical solution is:
In also opening up the aperture being connected with the first plunger hole on the cylinder body, inside the aperture other end and pump case
It communicates, the central axes of the aperture and the central axes of the first plunger hole are vertical each other；
One end that first plunger does not extend into the first plunger hole is spheric end, and first plunger protrudes into the first plunger hole
One end open up for the internal thread hole for the clamp nut that is spirally connected and protrude into for abutting the second plunger the platform of first plunger hole one end
Rank hole；
Second plunger includes a cylindrical portion, flange is extended outward to form in one end of the cylindrical portion, in described convex
Chamfering is respectively set in the upper seamed edge and lower knuckle of edge, and the flange is round flange；
Clamp nut is circular ring shape, opens up external screw thread in the outer ring of clamp nut, opens at the center of the clamp nut
If interior circular hole, the big 0.04~0.2mm of diameter of cylindrical portion described in the aperture ratio of the interior circular hole.
Beneficial effects of the present invention are as follows:
It is the configuration of the present invention is simple, easy to use, when the second plunger compresses working media in the second plunger hole not by or
It is acted on by minimum normal pressure, and swash plate acts on the normal force of the first plunger spheric end and acts on the by the first plunger hole
The normal direction dynamic balance of one plunger, since the diameter of the first plunger is greater than the diameter of the second plunger, the first plunger, the first plunger
Normal pressure between hole can be reduced to tolerable injury level, ensure that the rate of depreciation quilt of the first plunger pair, the second plunger pair
Control is in normal level.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing plunger pair.
Fig. 2 is the structural schematic diagram that cylinder body is connect with the first plunger, the second plunger in the present invention.
Fig. 3 is the structural schematic diagram of the first plunger in the present invention.
Fig. 4 is the structural schematic diagram of the second plunger in the present invention.
Fig. 5 is the structural schematic diagram of clamp nut in the present invention.
Fig. 6 is the distribution of force schematic diagram of each structure in the present invention.
Wherein: 1, plunger；2, cylinder bore；3, the first plunger；301, stepped hole；302, internal thread hole；303, step surface；
4, cylinder body；401, the first plunger hole；402, the second plunger hole；5, the second plunger；501, chamfering；502, cylindrical portion；503, convex
Edge；6, aperture；7, clamp nut；701, external screw thread；702, interior circular hole.
Specific embodiment
Illustrate a specific embodiment of the invention below.
As shown in Fig. 2, a kind of plunger auxiliary structure for ultrahigh pressure axial plunger pump includes cylinder body 4, in cylinder body 4 points
The first plunger hole 401 for installing the first plunger 3 and the second plunger hole 402 for installing the second plunger 5 are not opened up, on
It states the first plunger hole 401 to be connected to form stepped hole with the second plunger hole 402, the first plunger 3 protrudes into one end of the first plunger hole 401
The one end fits of the first plunger hole 401 are protruded by clamp nut 7 and the second plunger 5.In also being opened up on cylinder body 4 and the first plunger
The aperture 6 that hole 401 is connected, the central axes of aperture 6 and the central axes of the first plunger hole 401 are vertical each other, and aperture 6 is not with first
One end that plunger hole 401 connects is connected to pump body.
As shown in Figure 2 and Figure 3, one end that the first plunger 3 does not extend into the first plunger hole 401 is spheric end, in the first plunger 3
The one end for protruding into the first plunger hole 401 is sequentially opened up with the internal thread hole 302 for the clamp nut 7 that is spirally connected and for abutting the second plunger
5 protrude into the stepped hole 301 of 401 one end of the first plunger hole, as shown in figure 4, the second plunger 5 includes a cylindrical portion 502, in cylinder
The one end in portion 502 extends outward to form flange 503, and chamfering 501, flange is respectively set in the upper seamed edge of flange 503 and lower knuckle
503 be round flange.As shown in figure 5, clamp nut 7 is circular ring shape, external screw thread 701 is opened up in the outer ring of clamp nut 7, is being pressed
Interior circular hole 702, the big 0.04~0.2mm of diameter of the aperture ratio cylindrical portion 502 of interior circular hole 702 are opened up at the center of tight nut 7.
Specific assembly method of the invention is as follows:
As shown in Fig. 2, the one end of the second plunger 5 with cylindrical portion 502 passes through the interior circular hole 702 of clamp nut 7 and protrudes into
In second plunger hole 402, the second plunger 5 protruded into the first plunger hole 401 with one end of flange 503 and with the first plunger 3
The bottom hole of stepped hole 301 abuts against, and is then threadedly coupled clamp nut 7 with the internal thread hole 302 in the first plunger 3, until
Clamp nut 7 is abutted with the step surface 303 of stepped hole 301, is achieved in the flange 503 of the second plunger 5 being locked in the first column
In the stepped hole 301 of plug 3.
Specific work process of the invention is as follows:
When the second plunger 5 compresses working media in the second plunger hole 402, the second plunger 5 is generated by working media
Axial compressive force P is produced vertically since the spheric end of the first plunger 3 is contacted with swash plate in the spheric end of the first plunger 3
Vertical component N and horizontal component F1 is formd in the power F of swash plate, power F, the vertical component N and the first plunger 3, the second plunger
5 axis perpendicular, the first normal pressure N1 and second which generates the first plunger 3 by the first plunger hole 401
Normal pressure N2 balance, due to being relatively large in diameter for the first plunger 3, the contact area of the first plunger 3 and the first plunger hole 401 is big
In the contact area of the second plunger 5 and the second plunger hole 402, therefore as produced by 5 compression work medium of the second plunger, the first column
Normal pressure between 1 outer surface of 401 inner surface of consent and the first plunger is reduced to tolerable injury level, and the arrangement of aperture 6 makes
When one plunger 3 moves back and forth in the first plunger hole 401, closed containing cavity not will form between the first plunger hole 401.
Above description is explanation of the invention, is not intended to limit the invention, and limited range of the present invention is referring to right
It is required that the present invention can make any type of modification without prejudice to basic structure of the invention.
Claims (3)
1. a kind of plunger auxiliary structure for super-pressure axial direction oblique plate plunger pump, it is characterised in that: including swash plate, plunger pair, cylinder
Body (4) opens up the first plunger hole (401) for install the first plunger (3) in the cylinder body (4) and for installation the respectively
The second plunger hole (402) of two plungers (5), one end that the first plunger (3) protrudes into the first plunger hole (401) pass through clamp nut
(7) one end fits of the first plunger hole (401) are protruded into the second plunger (5), the diameter of first plunger (3) is greater than the second column
It fills in (5), when the second plunger (5) compression working media in the second plunger hole (402), the first plunger (3) and the first plunger
The contact area in hole (401) is greater than the contact area of the second plunger (5) and the second plunger hole (402)；First plunger (3) is not
The one end for protruding into the first plunger hole (401) is spheric end and contacts with swash plate that first plunger (3) protrudes into the first plunger hole
(401) one end opens up for the internal thread hole (302) of the clamp nut that is spirally connected (7) and protrudes into for abutting the second plunger (5)
The stepped hole (301) of one plunger hole (401) one end；It is connected in also being opened up on the cylinder body (4) with the first plunger hole (401)
Aperture (6) communicates inside aperture (6) other end and pump case, the central axes of the aperture (6) and the first plunger hole
(401) central axes are vertical each other, the pump housing of one end and plunger pump that the aperture (6) does not connect with the first plunger hole (401)
Inside connection.
2. a kind of plunger auxiliary structure for super-pressure axial direction oblique plate plunger pump as described in claim 1, it is characterised in that: institute
Stating the second plunger (5) includes a cylindrical portion (502), extends outward to form flange (503) in one end of the cylindrical portion (502),
It is respectively set chamfering (501) in the upper seamed edge of the flange (503) and lower knuckle, the flange (503) is round flange.
3. a kind of plunger auxiliary structure for super-pressure axial direction oblique plate plunger pump as claimed in claim 2, it is characterised in that: pressure
Tight nut (7) is circular ring shape, external screw thread (701) is opened up in the outer ring of clamp nut (7), at the center of the clamp nut (7)
Place opens up interior circular hole (702), the big 0.04~0.2mm of diameter of cylindrical portion (502) described in the aperture ratio of the interior circular hole (702).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610962957.3A CN106438336B (en) | 2016-10-28 | 2016-10-28 | A kind of plunger auxiliary structure for super-pressure axial direction oblique plate plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610962957.3A CN106438336B (en) | 2016-10-28 | 2016-10-28 | A kind of plunger auxiliary structure for super-pressure axial direction oblique plate plunger pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106438336A CN106438336A (en) | 2017-02-22 |
| CN106438336B true CN106438336B (en) | 2019-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610962957.3A Active CN106438336B (en) | 2016-10-28 | 2016-10-28 | A kind of plunger auxiliary structure for super-pressure axial direction oblique plate plunger pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN106438336B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654365A (en) * | 2017-10-09 | 2018-02-02 | 陕西航天动力高科技股份有限公司 | A kind of plunger and plunger pump |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4197787A (en) * | 1977-08-29 | 1980-04-15 | The United States Of America As Represented By The Secretary Of The Navy | Pump piston with flexible member |
| CN201568242U (en) * | 2009-11-05 | 2010-09-01 | 泉州市麦格士液压技术有限公司 | Inclined shaft various plunger pump |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1565879A (en) * | 1977-08-19 | 1980-04-23 | British Hydromechanics | High pressure piston pumps |
| CN2566011Y (en) * | 2002-07-05 | 2003-08-13 | 柯坚 | Low pulsating variable desplacement plunger pump |
| CN201196146Y (en) * | 2008-04-18 | 2009-02-18 | 卢堃 | Cambered axle type spherical surface valve axial plunger variable displacement pump |
| CN101285465A (en) * | 2008-05-29 | 2008-10-15 | 梁国富 | High voltage oil-free small-sized plunger pump |
| CN103711689A (en) * | 2014-01-09 | 2014-04-09 | 北京理工大学 | High pressure hydraulic pump plunger of hollow structure |
-
2016
- 2016-10-28 CN CN201610962957.3A patent/CN106438336B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4197787A (en) * | 1977-08-29 | 1980-04-15 | The United States Of America As Represented By The Secretary Of The Navy | Pump piston with flexible member |
| CN201568242U (en) * | 2009-11-05 | 2010-09-01 | 泉州市麦格士液压技术有限公司 | Inclined shaft various plunger pump |
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| Publication number | Publication date |
|---|---|
| CN106438336A (en) | 2017-02-22 |
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