CN1328511C - Axial plunger pump for water medium - Google Patents

Axial plunger pump for water medium Download PDF

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Publication number
CN1328511C
CN1328511C CNB2004100263484A CN200410026348A CN1328511C CN 1328511 C CN1328511 C CN 1328511C CN B2004100263484 A CNB2004100263484 A CN B2004100263484A CN 200410026348 A CN200410026348 A CN 200410026348A CN 1328511 C CN1328511 C CN 1328511C
Authority
CN
China
Prior art keywords
plunger
conical
cylinder
pintle
pump
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
Application number
CNB2004100263484A
Other languages
Chinese (zh)
Other versions
CN1598308A (en
Inventor
乔丰立
唐兵
卢堃
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lanzhou University of Technology
Original Assignee
Lanzhou University of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lanzhou University of Technology filed Critical Lanzhou University of Technology
Priority to CNB2004100263484A priority Critical patent/CN1328511C/en
Publication of CN1598308A publication Critical patent/CN1598308A/en
Application granted granted Critical
Publication of CN1328511C publication Critical patent/CN1328511C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The present invention relates to an axial plunger pump for water medium, which comprises a main transmission shaft (1), a pump body (8), an end cover (2) and an inclined disk (3), wherein a cylinder body (6) is arranged in the pump body. The tail end of a crawler shoe plunger group (4) is arranged in the cylinder body (6), the head end of the crawler shoe plunger group (4) is outward extended and is supported on the inclined disk (3), and a flow distributing shaft (7) is fixedly arranged on the pump body (8) and is provided with an oil inlet, an oil outlet, a high and low pressure flow distributing groove and a pressure balancing groove. The outer surface of the flow distributing shaft (7) is an outward conical surface (P), the inner surface of the cylinder body (6) contacting the flow distributing shaft (7) is a conical surface (P'), and the inner surface of the tail end of the plunger in the crawler shoe plunger group (4) is a conical surface (P').

Description

The aqueous medium axial piston pump
Technical field
The present invention relates to the aqueous medium axial piston pump.
Background technique
Existing aqueous medium with the deficiency of axial piston pump is:
1) under high pressure, because distortion of materials, the seal clearance between plunger and the cylinder body can increase, and has reduced volumetric efficiency.
2) the axle distributing construction radial clearance of fixed interval (FI) can not compensate automatically, and pressure raises volumetric efficiency is sharply reduced.
Summary of the invention
Purpose of the present invention strengthens the sealability of axial piston pump, keeps its volumetric efficiency.
The present invention is the aqueous medium axial piston pump, comprise main drive shaft, the pump housing, end cap, swash plate, cylinder body is placed in the pump housing, the tail end of crawler shoe plunger group places in the cylinder body, head end is overhanging to be supported on the swash plate, pintle is fixedly installed on the pump housing, have oil inlet and outlet, high low pressure flow groove and relief groove on the pintle, the outer surface of pintle is an outer conical surface, the internal surface of the cylinder body that contacts with pintle is a conical surface, and the internal surface of the tail end of the plunger in the crawler shoe plunger group is a conical surface.It is conical surface that the pump housing and end cap are installed surface of contact.
Usefulness of the present invention: because the surface of contact of pintle and cylinder body is a conical surface, the pressure rising makes that the gap reduces between cylinder body and the flow oil, helps improving volumetric efficiency; Pressure raises, and makes the inner conical surface expansion of plunger tail end, has realized the seal clearance compensation, improves volumetric efficiency.Conical surface seal is all used in the sealing of the pump housing and end cap, pintle, and without packing seal, simplifies the structure.
Description of drawings
Fig. 1 is a scheme of erection of the present invention, and Fig. 2 (a) is the structural drawing of pintle, Fig. 2 (b) be the A-A of Fig. 2 (a) to sectional view, Fig. 2 (c) is the partial enlarged drawing of plunger tail end I.
Embodiment
As shown in Figure 1, the present invention includes main drive shaft 1, the pump housing 8, end cap 2, pintle 7, swash plate 3, cylinder body 6, cylinder body 6 is installed in the pump housing 8, the tail end of crawler shoe plunger group 4 places in the cylinder body 6, head end is overhanging to be supported on the swash plate 3, crawler shoe plunger group 4 and the crosshead shoe group 5 common rotatable parts of forming that dock with main drive shaft 1, pintle 7 places in the cylinder body 6.Main drive shaft 1 drives 5 rotations of crosshead shoe group under the driving of motor.9 is water intake.
Shown in Fig. 1, Fig. 2 (a), pintle 7 is fixedly installed on the pump housing 8, has oil inlet and outlet, high low pressure flow groove and relief groove on the pintle 7, and cylinder body 6 is suspended on the pintle 7, realizes the suction oil and the static balance of pump.
Shown in Fig. 1,2 (a), the outer surface of pintle 7 is an outer conical surface P, and the internal surface of the cylinder body 6 that contacts with pintle 7 is a conical surface P ', and the internal surface of the tail end of the plunger in the crawler shoe plunger group 4 is a conical surface P ".It is conical surface Q that the pump housing 8 is installed surface of contact with end cap 2.Two zone of high pressure H on the pintle 7 form a moment that balances each other with the zone of high pressure plunger, prevent the plunger eccentric wear, and the axial force to plunger can carry out the gap compensation simultaneously.Be communicated with by groove 10 between two zone of high pressure H.Fig. 2 (b) is that the middle A-A of Fig. 2 (a) is to sectional view.
Shown in Fig. 2 (c), the internal surface of plunger tail end is a conical surface P ", when pressure improved, it is big that the seal clearance of plunger tail end and cylinder body 6 becomes; the plunger tail end plays compensating action because resiliently deformable makes the conical bore expansion to the seal clearance increase of plunger tail end and cylinder body 6.

Claims (2)

1, the aqueous medium axial piston pump, comprise main drive shaft (1), the pump housing (8), end cap (2), swash plate (3), cylinder body (6) is placed in the pump housing, the tail end of crawler shoe plunger group (4) places in the cylinder body (6), head end is overhanging to be supported on the swash plate (3), pintle (7) is fixedly installed on the pump housing (8), pintle has oil inlet and outlet on (7), high low pressure flow groove and relief groove, the outer surface that it is characterized in that pintle (7) is an outer conical surface (P), the internal surface of the cylinder body (6) that contacts with pintle (7) is a conical surface (P '), and the internal surface of the tail end of the plunger in the crawler shoe plunger group (4) is a conical surface (P ").
2, aqueous medium axial piston pump according to claim 1 is characterized in that it is conical surface (Q) that the pump housing (8) is installed surface of contact with end cap (2).
CNB2004100263484A 2004-07-17 2004-07-17 Axial plunger pump for water medium Expired - Fee Related CN1328511C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2004100263484A CN1328511C (en) 2004-07-17 2004-07-17 Axial plunger pump for water medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2004100263484A CN1328511C (en) 2004-07-17 2004-07-17 Axial plunger pump for water medium

Publications (2)

Publication Number Publication Date
CN1598308A CN1598308A (en) 2005-03-23
CN1328511C true CN1328511C (en) 2007-07-25

Family

ID=34663922

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2004100263484A Expired - Fee Related CN1328511C (en) 2004-07-17 2004-07-17 Axial plunger pump for water medium

Country Status (1)

Country Link
CN (1) CN1328511C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101979867A (en) * 2010-09-13 2011-02-23 张全根 Swash plate axial plunger type oil motor and assembly thereof
CN104500327B (en) * 2014-11-26 2017-08-29 宁波中意液压马达有限公司 A kind of axial piston motor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602554A (en) * 1984-04-06 1986-07-29 Hydromatik Gmbh Axial piston machine, more particularly axial piston pump of the inclined disc or skew axis type
JPH08270546A (en) * 1995-03-31 1996-10-15 Kayaba Ind Co Ltd Rotary swash plate type piston pump
US6179574B1 (en) * 1997-01-22 2001-01-30 Jetec Company Apparatus for pressurizing fluids and using them to perform work
JP2003232277A (en) * 2002-02-12 2003-08-22 Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd Power source for construction machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602554A (en) * 1984-04-06 1986-07-29 Hydromatik Gmbh Axial piston machine, more particularly axial piston pump of the inclined disc or skew axis type
JPH08270546A (en) * 1995-03-31 1996-10-15 Kayaba Ind Co Ltd Rotary swash plate type piston pump
US6179574B1 (en) * 1997-01-22 2001-01-30 Jetec Company Apparatus for pressurizing fluids and using them to perform work
JP2003232277A (en) * 2002-02-12 2003-08-22 Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd Power source for construction machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
海水轴向柱塞泵配流方式的发展状况 王东,朱玉泉等,液压与气动,第2001年第7期 2001 *

Also Published As

Publication number Publication date
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GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20070725