CN203770047U - Axial plunger pump - Google Patents
Axial plunger pump Download PDFInfo
- Publication number
- CN203770047U CN203770047U CN201420192752.8U CN201420192752U CN203770047U CN 203770047 U CN203770047 U CN 203770047U CN 201420192752 U CN201420192752 U CN 201420192752U CN 203770047 U CN203770047 U CN 203770047U
- Authority
- CN
- China
- Prior art keywords
- plunger
- pump
- plunger cylinder
- oil distribution
- swash plate
- 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 - Lifetime
Links
- 238000009826 distribution Methods 0.000 claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 229910001141 Ductile iron Inorganic materials 0.000 claims abstract description 4
- 229910052738 indium Inorganic materials 0.000 claims description 9
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 9
- 239000011241 protective layer Substances 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 4
- 238000005495 investment casting Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model provides an axial plunger pump. The axial plunger pump comprises a pump body, a pump shell, an oil distribution disc, a plunger cylinder body, plungers, a transmission shaft and a tilting tray, wherein the plungers are positioned in nine axial plunger holes which are uniformly distributed in the plunger cylinder body, are used for driving the plunger cylinder body to rotate, and are compressed on the tilting tray through spring members; the tilting tray is arranged between the plunger cylinder body and the pump shell; the tilting tray is stationary; the transmission shaft passes through the plunger cylinder body and the tilting tray, and is connected with the pump body and the pump shell; the axis of the tilting tray and the axis of the plunger cylinder body form an included angle of predetermined degrees; the pump body and the oil distribution disc are integrally formed by spheroidal graphite cast iron by means of precision casting; the oil distribution disc is positioned between the pump body and the plunger cylinder body.
Description
Technical field
The utility model relates to a kind of axial piston pump, is specifically related to a kind of suitable New X Type B axial piston pump of applying on rail system electrohydraulic switch machine.
Background technique
XB type axial piston pump belongs to the axial piston pump of a kind of axle supporting cylinder body, inclined disc type valve plate distribution.This oil pump drive spindle, through cylinder body, is connected on the pump housing, pump case, by screw fastening by metal (upper.By the volume in the to-and-fro motion change plunger case of plunger, suck and discharge liquid.
The transmission shaft of XB type axial piston pump is not only wanted transmitting torque, also will bear the moment of flexure producing due to plunger lateral force.Therefore, guarantee that oil pump cylinder body when boosting is good with contacting of this friction pair of oil distribution casing, just seem extremely important.In addition, oil distribution casing and cylinder body running life to friction pair, directly affect efficiency and the life-span of oil pump.
At present, oil distribution casing is continued to use the technique of 50 ~ sixties of 20th century always and is carried out processing, and the life-span is low, and durability is poor, usually can not meet the index that railway system's electrohydraulic switch machine requirement runs well for 2400 hours continuously, bring certain hidden danger to the safety of the railway system.
Summary of the invention
In view of the above problems, the purpose of this utility model is to provide a kind of axial piston pump, can extend the life-span of plunger cylinder and oil distribution casing friction pair.
Institute's axial piston pump, comprising: the pump housing, pump case, oil distribution casing, plunger cylinder, plunger, transmission shaft and swash plate.Described plunger cylinder is provided with equally distributed nine axial columns consents, described in each, in plunger hole, be inserted with described plunger, described plunger drives described plunger cylinder to rotate, and described in each, plunger is respectively arranged with spring component, and described plunger is pressed on described swash plate by described spring component.Described swash plate is arranged between described plunger cylinder and described pump case, and described swash plate maintains static moving.Described transmission shaft, through described plunger cylinder and described swash plate, connects the described pump housing and described pump case, and between described transmission shaft and described cylinder body, by spline joint, the axis of described swash plate becomes the angle of predetermined number of degrees with respect with the axis of described plunger cylinder.The described pump housing and described oil distribution casing are cast and are formed by precision by spheroidal graphite cast iron integratedly, and described oil distribution casing is between the described pump housing and described plunger cylinder.
Described oil distribution casing surface is preferably provided with plating indium protective layer.
The angle of described predetermined number of degrees with respect is 6 ° of angles.
Above-mentioned axial piston pump, by the pump housing and oil distribution casing are set integratedly, makes, without designing in addition runner, to have reduced making production cost on the one hand in this way, on the other hand, owing to there is no the operation of cutting, runner design camber, is conducive to the circulation of fluid.In addition, oil distribution casing surface is formed with plating indium protective layer, can improve like this wear resistance of oil distribution casing, and then improves plunger cylinder and oil distribution casing this working life to friction pair.
Accompanying drawing explanation
Fig. 1 is the structural representation of the axial piston pump of an embodiment of the utility model.
Fig. 2 is the STRUCTURE DECOMPOSITION schematic diagram of the axial piston pump in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the axial piston pump of an embodiment of the present utility model is described in detail.
Above-mentioned axial piston pump belongs to the axial piston pump of a kind of axle supporting cylinder body, inclined disc type valve plate distribution, and it relies on plunger to-and-fro motion to change the volume of plunger cylinder, sucks and discharge liquid.
As depicted in figs. 1 and 2, this XB type axial piston pump comprises the compositions such as the pump housing 1, pump case 9, oil distribution casing 2, plunger cylinder 4, plunger 5, transmission shaft 11, swash plate 8.After axial piston pump has been assembled, plunger cylinder 4, plunger 5 and swash plate 6 are located in pump case 9.The pump housing 1 couples together by transmission shaft with pump case 9.
The pump housing 1 is connected with plunger cylinder 4.Plunger cylinder 4 is provided with equally distributed nine axial columns consents, and plunger 5 is inserted in plunger hole, by plunger 5, drives plunger cylinder 4 to rotate.
Each plunger 5 is provided with respectively spring component 12 accordingly, and plunger 5 is pressed on swash plate 8 by this spring component 12.As shown in Figure 2, the two ends of spring component 12 are respectively arranged with lower spring cup 3 and upper spring seat 6, for spring component 12 is firmly located with respect to plunger 5.
Oil distribution casing 2 is arranged between the pump housing 1 and plunger cylinder 4, and oil distribution casing 2 is arranged to maintain static moving.Plunger cylinder 4 forms friction pair with oil distribution casing 2.
The axial central authorities of plunger cylinder 4 are provided with transmission shaft through hole, and transmission shaft 11, through this transmission shaft through hole and swash plate 8, is connected with pump case 9 with the pump housing 1 by upper and lower bearing, and is undertaken fastening by screw.Transmission shaft 11 is not only wanted transmitting torque, and will bear the moment of flexure that plunger 5 lateral forces produce.
Between transmission shaft 11 and plunger cylinder 4, pass through spline coupling, as shown in region A in Fig. 1.Spline can be the rectangular spline shown in Fig. 2, or the involute splines shown in Fig. 3.Compare with plane key joint in the past, spline coupling can improve the centering between transmission shaft 11 and plunger cylinder 4, bearing capacity and the guidance quality of transmission shaft, make when rotating, more than stress surface between transmission shaft 11 and plunger cylinder 4 is increased to six dotted lines, thereby the feature with good stability, overcome well moment of torsion that transmission shaft 11 transmits and due to the moment of flexure of bearing the lateral force of plunger 5 and producing, the precision of plunger cylinder 4 and oil distribution casing 2 these friction pairs improves greatly, contacts better.
The axis of swash plate 8 becomes the angle of certain number of degrees with the axis of plunger cylinder 4, example 6 ° of angles as shown in Figure 1.Swash plate 8 maintains static, and plunger 5 is pressed on swash plate 8 by spring component 12.When transmission shaft 11 drives plunger cylinder 4 to rotate, due to the effect of swash plate 8, force plunger 5 interior reciprocating at plunger cylinder 4, thereby carry out oil suction and force feed by the dispensing window of oil distribution casing 2.
Oil distribution casing 2 forms with the pump housing 1, can utilize QT600-3 spheroidal graphite cast iron to be cast and formed by precision, adopts the hard nitriding treatment of gas to improve the surface hardness of the pump housing and oil distribution casing simultaneously.The pump housing making like this, its runner is without other processing, thereby greatly reduces the blank weight of material.In addition, owing to there is no the operation of cutting, runner design camber, thus be conducive to the circulation of fluid.Indium plated film infiltrates top layer by electrostatic principle,
Oil distribution casing 2 surfaces have alkaline indium protective layer, can by alkaline indium for example, (for example, TDY531) plating solution technology forms, and indium plated film infiltrates top layer by electrostatic principle.Because indium has good moist type and wear-resisting property, be applied to oil distribution casing 2 surfaces and form protective layer, the working life that contributes to improve plunger cylinder 4 and oil distribution casing 2 friction pairs.
Above-mentioned improved axial piston pump is conducive to the circulation of liquid; and because oil distribution casing surface has plating indium protective layer, flow face can maximumly reduce torque force when friction pair is worked, and reduces the coefficient of waste; there is good self lubricity, thereby can extend the operating life of friction pair.
Above combination embodiment has been described in detail the technical solution of the utility model, but the utility model is not limited to this.Realizing under the prerequisite of the utility model object, those skilled in the art can make various changes and distortion to the utility model.
Claims (3)
1. an axial piston pump, comprising: the pump housing, pump case, oil distribution casing, plunger cylinder, plunger, transmission shaft and swash plate,
Described plunger cylinder is provided with equally distributed nine axial columns consents, described in each, in plunger hole, be inserted with described plunger, described plunger drives described plunger cylinder to rotate, and described in each, plunger is respectively arranged with spring component, described plunger is pressed on described swash plate by described spring component
Described swash plate is arranged between described plunger cylinder and described pump case, and described swash plate maintains static moving,
Described transmission shaft, through described plunger cylinder and described swash plate, connects the described pump housing and described pump case, and between described transmission shaft and described cylinder body, by spline joint, the axis of described swash plate becomes the angle of predetermined number of degrees with respect with the axis of described plunger cylinder,
The described pump housing and described oil distribution casing are cast and are formed by precision by spheroidal graphite cast iron integratedly, and described oil distribution casing is between the described pump housing and described plunger cylinder.
2. axial piston pump according to claim 1, is characterized in that, described oil distribution casing surface is provided with plating indium protective layer.
3. axial piston pump according to claim 1, is characterized in that, the angle of described predetermined number of degrees with respect is 6 ° of angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420192752.8U CN203770047U (en) | 2014-04-21 | 2014-04-21 | Axial plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420192752.8U CN203770047U (en) | 2014-04-21 | 2014-04-21 | Axial plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203770047U true CN203770047U (en) | 2014-08-13 |
Family
ID=51287245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420192752.8U Expired - Lifetime CN203770047U (en) | 2014-04-21 | 2014-04-21 | Axial plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203770047U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762504A (en) * | 2016-12-23 | 2017-05-31 | 东莞市北恩流体控制设备有限公司 | Micro updating continuously transmits type plunger displacement pump |
-
2014
- 2014-04-21 CN CN201420192752.8U patent/CN203770047U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762504A (en) * | 2016-12-23 | 2017-05-31 | 东莞市北恩流体控制设备有限公司 | Micro updating continuously transmits type plunger displacement pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140813 |