CN206158988U - Cusp plunger for plunger pump - Google Patents
Cusp plunger for plunger pump Download PDFInfo
- Publication number
- CN206158988U CN206158988U CN201621038681.1U CN201621038681U CN206158988U CN 206158988 U CN206158988 U CN 206158988U CN 201621038681 U CN201621038681 U CN 201621038681U CN 206158988 U CN206158988 U CN 206158988U
- Authority
- CN
- China
- Prior art keywords
- plunger
- half module
- preceding half
- back mold
- module
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model provides a cusp plunger for plunger pump belongs to the hydraulic transmission technology field. This plunger includes preceding half module and back half module, and preceding half module front end be spherical, and the rear end of preceding half module is the structure that gear -type described, has guaranteed the the stiffness of plunger, and preceding half module is followed the axis direction and has been offered the through -hole, back half module is the hollow cylinder structure, and from the plunger terminal surface and set up in the 13 length departments of plunger with the cylinder body contact length, the high -pressure fluid in plunger bottom makes the clearance between plunger hollow structure local expansion deformation compensation plunger and the plunger chamber, obtains good sealed effect, and preceding half module is connected through welding the plane with the back half module, preceding half module after with the half module external diameter the same. The utility model has the advantages of the plunger have weight little, in that the inertia of operation in -process is little, volume efficiency is high, plunger pump rotational speed and from advantages such as inhaling nature height, material saving and energy -conservation.
Description
Technical field
The invention belongs to hydraulic transmission technology field, and in particular to a kind of plunger displacement pump toothed rams.
Background technology
In hydraulic drive field, axial plunger pump with superior performance because being widely used.Axial plunger pump
Operation principle is to move back and forth produced volume change in cylinder body to carry out oil suction and oil extraction using plunger.Axial plunger pump
Because its compact conformation, operating pressure are high, volumetric efficiency is high, be widely used in Aero-Space, engineering machinery, plastics machinery, metallurgy,
The field such as lathe and agricultural machinery.Axial plunger pump is the very high class hydraulic pump of technology content, and its complex structure, kind is numerous
Many, manufacturing process is complicated, and processing request is high.In the case of the development of numerous Hydraulic Elements structures, technique etc. now is metastable,
Axial plunger pump is still in the constantly development, perfect of the aspects such as structure, material, performance, life-span.
In plunger displacement pump key building block, plunger is the strength member that plunger displacement pump normally runs, and the performance of plunger is to post
The task performance and service life of plug pump has important impact.Therefore, piston structure is carried out reasonably designing to improving post
The performance of plug pump has vital effect.
Traditional plunger is all solid construction, and weight is larger, and required driving force also accordingly increases, and in manufacture craft mistake
Cheng Zhong, the material that plunger is used is more, so that its production cost is significantly increased.It is whole that the plunger of hydraulic planger pump should have
Body rigidity has again little quality to reduce inertia produced during rotation, be all in the past by hollowing out inside whole plunger body,
To realize reducing the quality of plunger, but a problem so occurs：The cavity volume increase that plunger hollow space is surrounded with cylinder body,
Plunger extrude stroke end when, in plunger base the chamber in still remaining some outlet pressures fluid, when it enters suction stroke,
Expansion can first be started, pressure is down to suction pressure, so just lose part suction volume, as allowance for expansion loss.
The content of the invention
It is an object of the invention to overcome the shortcoming of prior art, there is provided a kind of weight is little, volumetric efficiency is high, save material
With the plunger displacement pump toothed rams of energy-conservation.
For achieving the above object, the present invention adopts following technical proposals：The plunger includes front half module and back mold half, front half module
Front end is spherical plunger termination, and the rear end of front half module is the structure of gear shape, and the structure of the gear shape is provided with uniform point
In the bending gear piece on central cylinder surface, the cross section of the bending gear piece is that have phase concentric with central cylinder to cloth
Radian is 15 ° of sector, and the upper surface and lower surface of the bending gear piece are 75 ° around the angle that central cylinder rotates, first half
Mould offers in the axial direction through hole, and the through hole provides the oil sources of static pressure support for plunger and piston shoes；Back mold half is open circles
Column structure, from plunger end and is arranged at 1/3 length of plunger and cylinder body contact length, plunger base hydraulic oil
Liquid makes the gap between the deformation-compensated plunger of plunger hollow-core construction differentially expanding and plunger cavity, obtains good sealing effectiveness.Before
Half module is connected with back mold half by welding plane, and front half module is identical with back mold half external diameter.
In plunger pump work, the surface of the back mold half hollow cylinder body characteristicses is always positioned at the inside of cylinder bore, protects
Plunger pair is demonstrate,proved and there is good sealing.Meanwhile, retracting spring can be laid in the back mold half hollow plunger, make plunger exist
Oil suction area resets.
The present invention has advantages below：The bending dentalation of the present invention greatly reduces its quality, the volumetric efficiency of plunger
Increase, reduce driving force, so as to reach the effect of energy-conservation, while the upper and lower end face of the sector crosssection of bending gear piece is in
The radial load that the angle balance piston shoes of heart cylinder rotation are produced to plunger, can adapt to the trend of hydraulic pump high speed development.
Description of the drawings
Fig. 1 is piston structure schematic diagram of the present invention；
Fig. 2 is the sectional view of the central cylinder of plunger of the present invention；
Fig. 3 is the schematic diagram of the sectional view present position of the central cylinder of plunger of the present invention；
Fig. 4 is back mold half upward view in Fig. 1.
In figure：1：Front half module；2：Plunger termination；3：Through hole；4：Bending gear piece；5：Central cylinder；6：Back mold half；7：Weldering
Connect plane.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention will be further described.
As shown in figure 1, a kind of plunger displacement pump toothed rams, the plunger includes front half module 1 and back mold half 6, the front half module 1
Front end is spherical plunger termination 2, and the rear end of the front half module 1 is the structure of gear shape, is provided with 4 and is evenly distributed on center circle
The bending gear piece of damaged surface, the front half module 1 offers in the axial direction through hole 3, and the back mold half 6 is hollow cylinder knot
Structure, the front half module 1 is connected with back mold half 6 by welding plane 7, and the front half module 1 is identical with the external diameter of back mold half 6.
As shown in Fig. 2 the cross section of bending gear piece 4 is the fan that the radian for having phase concentric with central cylinder is 15 °
Shape, the upper surface and lower surface of the bending gear piece 4 are 75 ° around the angle that central cylinder 5 rotates.
The casting of front half module 1, the extrusion molding of back mold half 6, is connected by welding plane 7, is welded using friction welding (FW).
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not to present invention protection model
The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need the various modifications made by paying creative work or deformation still within protection scope of the present invention.
Claims (2)
1. a kind of plunger displacement pump toothed rams, it is characterised in that：The plunger includes front half module (1) and back mold half (6), the first half
Mould (1) front end is spherical plunger termination (2), and the rear end of the front half module (1) is to be evenly distributed on central cylinder (5) surface
Bending gear piece (4), the front half module (1) offers in the axial direction through hole (3), and the back mold half (6) is hollow cylinder knot
Structure, the front half module is connected with back mold half by welding plane (7), and the front half module (1) is identical with back mold half (6) external diameter.
2. a kind of plunger displacement pump toothed rams according to claim 1, it is characterised in that the bending gear piece (4) it is transversal
The sector that face is with the radian of (5) with phase concentric central cylinder is 15 °, the upper surface of the bending gear piece (4) is with
End face is 75 ° around the angle that central cylinder (5) rotates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621038681.1U CN206158988U (en) | 2016-09-06 | 2016-09-06 | Cusp plunger for plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621038681.1U CN206158988U (en) | 2016-09-06 | 2016-09-06 | Cusp plunger for plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206158988U true CN206158988U (en) | 2017-05-10 |
Family
ID=58650659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621038681.1U Expired - Fee Related CN206158988U (en) | 2016-09-06 | 2016-09-06 | Cusp plunger for plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206158988U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339230A (en) * | 2017-07-05 | 2017-11-10 | 哈尔滨理工大学 | A kind of positive displacement plunger with wave surface |
-
2016
- 2016-09-06 CN CN201621038681.1U patent/CN206158988U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339230A (en) * | 2017-07-05 | 2017-11-10 | 哈尔滨理工大学 | A kind of positive displacement plunger with wave surface |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170510 Termination date: 20170906 |