WO1999037917A1 - Pompe a piston axial - Google Patents

Pompe a piston axial Download PDF

Info

Publication number
WO1999037917A1
WO1999037917A1 PCT/JP1999/000222 JP9900222W WO9937917A1 WO 1999037917 A1 WO1999037917 A1 WO 1999037917A1 JP 9900222 W JP9900222 W JP 9900222W WO 9937917 A1 WO9937917 A1 WO 9937917A1
Authority
WO
WIPO (PCT)
Prior art keywords
axial piston
plate
sliding surface
cylinder block
pump
Prior art date
Application number
PCT/JP1999/000222
Other languages
English (en)
Japanese (ja)
Inventor
Masao Shinoda
Original Assignee
Ebara Corporation
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 Ebara Corporation filed Critical Ebara Corporation
Publication of WO1999037917A1 publication Critical patent/WO1999037917A1/fr

Links

Classifications

    • 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
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2035—Cylinder barrels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the present invention relates to an axial piston pump having a piston, a cylinder block, a swash plate, a valve plate, and a main shaft, and using a low-viscosity fluid such as water as a working fluid.
  • FIGS. 8 to 10 show the structure of this type of axial piston pump.
  • FIG. 8 is a sectional view
  • FIG. 9 is a valve plate of the axial piston pump shown in FIG.
  • FIG. 5 is a view on arrow A
  • FIG. 10 is a view on arrow B of the axial piston pump of FIG.
  • the axial piston pump has a structure including a casing 1, a piston 2, a cylinder block 3, a swash plate 4, a valve plate 5, a main shaft 6, and the like.
  • the cylinder block 3 splined to the main shaft 6 also rotates, so that the slits 7 slide on the surface of the swash plate 4, and the piston 2 has a piston bore.
  • valve plate 5 has a disk shape in which arc-shaped low-pressure ports 5a and high-pressure ports 5b are formed with a line connecting the top dead center D and the bottom dead center C interposed therebetween. Further, on the surface of the cylinder block 3 which slides on the valve plate 5, there is provided a brow-shaped hole 3 b, which communicates with the screw bore 3 a. While the cylinder block 3 rotates from the bottom dead center C to the top dead center D, the piston 2 moves to the right, and the fluid flows from the low pressure boat 5a of the valve plate 5 into the screw pump 3a. Inhaled, and cylinder block 3 is at top dead center!
  • piston 2 moves to the left and discharges fluid from high pressure port 5b of valve plate 5.
  • the axial piston pump is a pump that sucks and discharges fluid using the volume change due to the reciprocating motion of the piston 2.
  • the fluid sucked into the piston bore 3a flows into the sliding surface of the swash plate 4 and the slipper 7 through the passage 2a in the piston 2, and acts as a lubricating liquid.
  • the cylinder block 3 rotates with the rotation of the main shaft 6, and the supporting form of the cylinder block 3 is shown in FIG.
  • the overhang bearing mechanism is often used.
  • a plain bearing lubricated with the working fluid is used as the cylindrical bearing 8.
  • reference numeral 9 denotes a bearing (ball bearing) that supports the main shaft 6, and reference numeral 10 denotes a shaft seal.
  • a screw bore 3a and a cocoon-shaped hole 3b are formed in the same member called a cylindrical hook 3.
  • biston 2 when piston 2 reciprocates in piston bore 3a, 1 1
  • fluid leakage Q between biston bore 3a and biston 2 may increase. There is. This leakage of the fluid causes leakage loss, which is a factor that reduces the volumetric efficiency of the pump.
  • the cylinder block 3 rotates with the rotation of the main shaft 6, and the cylinder block 3 is attached to the valve plate 5.
  • sliding rotation is performed in the E section shown in Fig. 12.
  • sliding resistance occurs due to sliding.
  • the mechanical loss due to this resistance is particularly large, causing a decrease in the mechanical efficiency of the pump.
  • the conventional valve plate 5 and the cylindrical opening 3 have been coated with resin or the like, which has excellent sliding properties under water lubrication. Options have been limited.
  • the present invention has been made in view of the above points, and an object of the present invention is to provide an axial piston pump having excellent workability and production efficiency and high pump efficiency. Disclosure of the invention
  • a casing, a cylinder opening, a piston, a swash plate, a valve plate, a main shaft, and the like are accommodated in the casing, and the rotation of the main shaft causes the cylindrical opening to rotate in the casing.
  • the piston reciprocates with the piston, and the cylindrical member is fitted to the cylinder block's piston bore in an axial piston pump that suctions and discharges fluid by the reciprocation of the piston. It is characterized by having been let go.
  • the cylindrical A flange is provided on an end face of the cylindrical member to be fitted with the cylinder block.
  • a plurality of cylindrical members are provided, and a plurality of cylindrical members are combined to form a circumferential groove on the piston sliding surface.
  • the cylindrical member is formed of a ceramic material.
  • a plate having a cocoon-shaped hole is provided on an end face on a valve plate side of the cylindrical hook. Further, in the axial piston type pump having the above configuration, both the plate having the eyebrows and the valve plate are formed of ceramics. ⁇
  • both the plate having the eyebrows and the valve plate and / or the valve plate are formed of a resin material.
  • both the sliding surface of the plate with the eyelet-shaped hole with the valve plate and the sliding surface of the valve plate with the plate with the eyelet-shaped hole are provided. It is characterized in that one of them is coated with a resin material.
  • both the sliding surface of the plate with the eyelet-shaped hole with the valve plate and the sliding surface of the valve plate with the plate with the eyelet-shaped hole are provided.
  • the feature is that ceramics is coated on one of them.
  • the sliding surface of the plate having the eyelet-shaped hole with the valve plate and the eyelet-shaped hole of the valve plate are provided. It is characterized by coating titanium nitride (Ti) on both or one of the sliding surfaces with the plate.
  • both the sliding surface of the plate with the eyelet-shaped hole with the valve plate and the sliding surface of the valve plate with the plate with the eyelet-shaped hole are provided.
  • the feature is that one of them is coated with a diamond-like DLC (DLC).
  • FIG. 1 is a sectional view showing a structural example of an axial piston pump according to the present invention.
  • FIG. 2 is a cross-sectional view showing a cylindrical member and a piston portion of the axial piston pump of FIG.
  • FIG. 3 is a sectional view showing a cylindrical member and a piston portion of the axial piston pump of FIG.
  • FIG. 4 is a view showing details of an end of a cylindrical member of the axial piston pump of FIG.
  • FIG. 5 is a view showing details of an end of a cylindrical member of the axial piston pump of FIG.
  • FIG. 6 is a view of the axial piston pump of Fig. 1 as viewed in the direction of arrow A.
  • Fig. 7 is a view of the axial piston pump of Fig. 1 as viewed in the direction of arrow B.
  • Fig. 8 is a conventional axial pump.
  • FIG. 2 is a cross-sectional view illustrating a structural example of a piston type pump.
  • FIG. 9 is a view on arrow A showing the valve plate of the axial piston pump of FIG.
  • FIG. 10 is a view of the axial piston pump of FIG. You.
  • Fig. 11 is a conceptual diagram showing the relationship between the piston bore and the piston of a conventional axial piston pump.
  • FIG. 12 is a diagram showing details of a sliding portion between the valve plate and the cylinder block.
  • BEST MODE FOR CARRYING OUT THE INVENTION FIG. 1 is a sectional view showing the structure of an axial piston pump according to the present invention.
  • parts denoted by the same reference numerals as those in FIGS. 8 to 10 indicate the same or corresponding parts, and a description thereof will be omitted.
  • This axial piston pump is equipped with a casing 1, a piston 2, a cylinder block 3, a swash plate 4, a valve plate 5, a main shaft 6, etc., and uses a low-viscosity fluid such as water as a working fluid.
  • a low-viscosity fluid such as water as a working fluid.
  • the cylindrical member 13 is fitted into the hole for forming the piston bore 3a of the cylinder block 3.
  • the conventional cylinder block 3 is divided into the cylinder block 3 and the plate 11 having a cocoon-shaped hole, and the plate 11 having the cocoon-shaped hole is joined to the cylinder block 3.
  • the conventional cylinder block 3 is divided into the cylinder block 3 and the plate 11 having a cocoon-shaped hole, and the plate 11 having the cocoon-shaped hole is joined to the cylinder block 3.
  • this axial piston pump has a cylindrical member 13 made of ceramics shrink-fit to the inner periphery of the hole for forming the piston bore 3a of the cylinder block 3.
  • the hole for forming the screw bore 3a of the cylinder block 3 becomes a through hole, so that it does not have a tapered shape as in the conventional case.
  • the cylindrical member 13 is formed into a piston bore 3 a of the cylinder block 3. After fitting into the holes, finish processing such as honing is performed to increase the cylindrical accuracy, coaxiality with Boston 2, and concentric accuracy.
  • the cylindrical member 13 can be composed of one member as shown in FIG. 2, but as shown in FIG. 3, a plurality of cylindrical members 13 1, 1 3 2 and By combining 1 3—3 and 1 3—4 to form a cylindrical member 13, several grooves 1 3 — 1 a, 1 3 — 2 a, 13-3a can be formed to increase the lubricity of piston 2 movement.
  • the number of cylindrical components is not limited to this figure.
  • a plurality of cylindrical components 13 1, 1-3, 1-3 are provided in the holes for forming the piston holes 3 a of the cylinder block 3. 1 3-2 s
  • finish processing such as honing to improve cylindrical accuracy, coaxiality with piston 2, and concentric accuracy.
  • the cylindrical shaped member 13 or a plurality of cylindrical constituent members 13-1, 13-2, 13-3, 13-4 are screws from the swash plate 4 side of the cylinder block 3.
  • the flange 13a is inserted into the hole forming the tonbore 3a and fitted together.
  • the flange 13a is attached to the end face of the cylindrical member 13 or the cylindrical component 13-4.
  • a flange may not be provided.
  • the cylindrical member 13 or a plurality of cylindrical constituent members 13 3, 1 3, 2, 1 3, 3 are formed in the holes for forming the screw holes 3 a of the cylinder block 3.
  • the cylindrical member 13 is formed by fitting 1 3-4, the tapered shape of the piston bore 3 a is avoided, and the volumetric efficiency of the pump due to leakage loss is reduced. Can be avoided. You.
  • the cylindrical member 13 or the cylindrical component members 13-1, 13-2, 13-3, 13-4 are used as the screw bore 3a of the cylinder block 3 as described above.
  • the cocoon-shaped hole forming part which had been integrally processed with the conventional cylinder block, was changed to a plate 11 with cocoon-shaped holes as a separate member. Attach it to the end face of the double block on the valve plate 5 side.
  • a sealing groove 3c such as a 0-ring is formed on the joint surface of the cylinder block 3 with the plate 11 having a cocoon-shaped hole, and the seal 12 is formed. Then, as shown in Fig. 6, attach the plate 11 with the eyelet-shaped hole to the end face of the cylinder block 3 with the screw 14.
  • the plate 11 with the eyelet-shaped hole as a separate member from the cylinder block 3—, the structure of the constituent members can be simplified, so that workability and production efficiency are greatly improved. To improve.
  • the cylinder block 3 rotates with the rotation of the main shaft 6, but the cylinder block 3 is attached to the cylinder block 3 G11 slides and rotates with respect to the valve plate 5 on the sliding surface shown in FIG.
  • the plate 11 and the valve plate 5 and / or one of the valve plate 5 made of ceramics or resin made of the eyelet-shaped hole? Titanium nitride (TiN) and diamond-like carbon (DLC) are coated on both or one of the sliding surfaces to achieve high sliding performance and low friction performance under water lubrication.
  • TiN titanium nitride
  • DLC diamond-like carbon
  • the cylindrical part is attached to the piston bore of cylinder block 3. Since the material 13 is configured to be fitted, it is possible to avoid the tapered shape of the screw bore and to reduce the leakage of the working fluid, so that a low-viscosity fluid such as water is used as the working fluid. Pump efficiency is improved in axial piston pumps.
  • the cylinder block is divided into a cylinder block and a plate with a hole-shaped hole, and the plate with a hole-shaped hole is joined to the end face of the cylinder block. Efficiency and workability of parts are improved.
  • the cylindrical member is fitted into the cylinder bore of the cylinder block, it is possible to avoid the tapered bore of the piston bore and to reduce the leakage of the working fluid. Therefore, an axial piston pump with high pump efficiency can be provided even when a low-viscosity fluid such as water is used as a working fluid.
  • the cylinder block is divided into a cylinder block and a plate with a hole-shaped hole, and the plate with the hole-shaped hole is joined to the end surface of the cylinder block.
  • an axial piston pump that can be expected to improve the workability of parts can be provided.

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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

Cette invention concerne une pompe à piston axial qui possède d'excellentes caractéristiques de fonctionnement, de rendement et d'efficacité de pompage. Cette pompe comprend un bloc cylindre (3), un piston (2), un disque en nutation (4), un plateau de valve (5) et un arbre principal (6) qui sont tous disposés à l'intérieur d'un carter (1). Un élément cylindrique (13) est monté dans l'alésage du piston du bloc cylindre (3), tandis qu'un plateau (11) comportant un trou en forme de cocon est monté sur la surface d'extrémité du bloc cylindre (3) du côté du plateau de valve.
PCT/JP1999/000222 1998-01-27 1999-01-22 Pompe a piston axial WO1999037917A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10/30597 1998-01-27
JP10030597A JPH11210616A (ja) 1998-01-27 1998-01-27 アキシアルピストン型ポンプ

Publications (1)

Publication Number Publication Date
WO1999037917A1 true WO1999037917A1 (fr) 1999-07-29

Family

ID=12308286

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1999/000222 WO1999037917A1 (fr) 1998-01-27 1999-01-22 Pompe a piston axial

Country Status (2)

Country Link
JP (1) JPH11210616A (fr)
WO (1) WO1999037917A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK179402B1 (en) * 2011-11-16 2018-05-28 Ocean Pacific Tech Improved rotary axial piston pump
CN112983703A (zh) * 2021-04-16 2021-06-18 山东交通职业学院 一种用于石油机械的燃油滤清装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4721880B2 (ja) * 2005-11-25 2011-07-13 京セラ株式会社 プランジャポンプおよびこれを用いたポンプ装置
CN103946543B (zh) * 2012-03-30 2016-10-12 Ｋｙｂ株式会社 活塞泵和活塞马达
CN102619715B (zh) * 2012-04-26 2014-07-09 安徽理工大学 一种平衡式大流量轴向柱塞泵

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5033210A (fr) * 1973-07-23 1975-03-31
JPS5891301A (ja) * 1981-11-24 1983-05-31 Mitsubishi Heavy Ind Ltd アキシヤルピストン型流体機械
JPS6128768A (ja) * 1984-07-07 1986-02-08 Mitsubishi Heavy Ind Ltd ピストン型流体機械シリンダ溝
JPS61103578U (fr) * 1984-12-12 1986-07-01
JPS61113981U (fr) * 1984-12-26 1986-07-18
JPH05296248A (ja) * 1992-04-21 1993-11-09 Sumitomo Electric Ind Ltd 摺動部材
JPH0631818A (ja) * 1992-07-17 1994-02-08 Toshiyuki Fukaya 合成樹脂製嵌合部品の製造方法
JPH08147021A (ja) * 1994-11-16 1996-06-07 Yaskawa Electric Corp 数値制御装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5033210A (fr) * 1973-07-23 1975-03-31
JPS5891301A (ja) * 1981-11-24 1983-05-31 Mitsubishi Heavy Ind Ltd アキシヤルピストン型流体機械
JPS6128768A (ja) * 1984-07-07 1986-02-08 Mitsubishi Heavy Ind Ltd ピストン型流体機械シリンダ溝
JPS61103578U (fr) * 1984-12-12 1986-07-01
JPS61113981U (fr) * 1984-12-26 1986-07-18
JPH05296248A (ja) * 1992-04-21 1993-11-09 Sumitomo Electric Ind Ltd 摺動部材
JPH0631818A (ja) * 1992-07-17 1994-02-08 Toshiyuki Fukaya 合成樹脂製嵌合部品の製造方法
JPH08147021A (ja) * 1994-11-16 1996-06-07 Yaskawa Electric Corp 数値制御装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK179402B1 (en) * 2011-11-16 2018-05-28 Ocean Pacific Tech Improved rotary axial piston pump
US10309380B2 (en) 2011-11-16 2019-06-04 Ocean Pacific Technologies Rotary axial piston pump
CN112983703A (zh) * 2021-04-16 2021-06-18 山东交通职业学院 一种用于石油机械的燃油滤清装置

Also Published As

Publication number Publication date
JPH11210616A (ja) 1999-08-03

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