CN102155368B - High-pressure plunger pump - Google Patents
High-pressure plunger pump Download PDFInfo
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- CN102155368B CN102155368B CN201110134433.2A CN201110134433A CN102155368B CN 102155368 B CN102155368 B CN 102155368B CN 201110134433 A CN201110134433 A CN 201110134433A CN 102155368 B CN102155368 B CN 102155368B
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- pump
- cylinder body
- pump housing
- pressure plunger
- pump case
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Abstract
The invention relates to a novel high-pressure plunger pump which comprises a pump body, a pump shell, an end closure and a flange plate, wherein the pump body comprises a pump body neck part, a pump body ring part, an oil outlet and an oil inlet; the oil outlet and the oil inlet are arranged at both sides of the pump body ring part; a locating hole, a lubricating hole and two crescent grooves are arranged at the step surface of the end part of the pump body ring part; the pump shell is fixedly connected with the end closure; two side surfaces of the pump shell close to the end closure are provided with oil returning holes; the front end surface of the cylinder is matched with an oil distributing disc; the pump shell is made of plastic material or composite material; the pump body ring part is covered and fixed by the plastic material or the composite material; the side surfaces of the oil outlet and the oil inlet of the pump body are covered and fixed by the pump shell and the pump body is provided with openings at two side surfaces of the pump shell; the cylinder comprises a cylinder body; the cylinder body is formed by compressing powder metallurgy at a time or machining a nodular cast iron; and the cylinder body is internally provided with 5 to 12 plug holes. The novel high-pressure plunger pump has advantages that the production cost is greatly reduced, the wear-resisting property is good, the weight is light and the product quality is good.
Description
Technical field
The present invention relates to a kind of Novel high-pressure plunger pump.
Background technique
High-pressure plunger pump pump case of the prior art is foundry goods or steel material, but processing cost is higher.Pump housing volume of the prior art is larger, and the cost of raw material is larger.Cylinder of high-pressure plunger pump of the prior art as illustrated in fig. 1 and 2, comprise that cylinder body body 1 ' and cylinder sleeve 2 ' form, cylinder body body 1 ' has 5-12 plunger hole 4 ', plunger hole 4 ' inner sleeve has copper sheathing 5 ', cylinder body body 1 ' is Split type structure with cylinder sleeve 2 ', cylinder body body upper-end surface is covered with copper layer 3 ', and cylinder body body 1 ' and cylinder sleeve 2 ' are steel material.Although these structures have guaranteed that existing cylinder body can be wear-resisting, processing technology is complicated, and cost of production is high.
Summary of the invention
The object of this invention is to provide a kind of Novel high-pressure plunger pump, to solve above-mentioned deficiency.
The technical solution used in the present invention is:
Novel high-pressure plunger pump, comprise the pump housing, pump case, end cap and flange plate, the described pump housing comprises pump housing neck, pump housing ring portion, open in oil outlet and the filler opening of pump housing ring portion both sides, on the end step surface of described pump housing ring portion, have positioning hole, lubrication hole and two crescents, described pump housing neck is fixedly connected with flange plate, described pump case is fixedly connected with end cap, described pump case has return opening near the bi-side of end cap, described pump case is built-in with oil distribution casing, cylinder body, bearing, inner sleeve, overcoat, return plate, swash plate and piston shoes, described return plate is fixed on swash plate, inside be sheathed in the plunger hole of cylinder body body, the described outer plunger hole outside that is sheathed on, described cylinder body front-end face and oil distributing plate combining, described pump case is plastic material or composite material quality, described pump housing ring portion is coated and fixed by pump case, the oil outlet of the described pump housing and the side of filler opening are coated and fixed by pump case and open in pump case bi-side at the opening of pump case, described cylinder body comprises cylinder body body, described cylinder body body is by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping, in described cylinder body body, have 5-12 plunger hole.
Pump housing ring portion side between described oil outlet and filler opening has symmetrical 4 fixing ears, and described fixedly ear is connected with pump housing ring portion one, and described fixedly ear is coated by pump case, and described fixedly ear is opened on bottom pump case.
The end step surface of described pump housing ring portion is one deck.
Described pump housing neck is plastic material or composite material quality, and described pump housing neck is connected with pump case one, and pump housing ring portion is coated and fixed by pump case and pump housing neck.
Described cylinder body is comprised of cylinder body body, and described cylinder body body is cylinder type, and described cylinder body body directly and the bearing fit of high-pressure plunger pump.
Described cylinder body also comprises cylinder sleeve, and described cylinder sleeve is by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping, and described cylinder body body and cylinder sleeve are structure as a whole, the bearing fit of described cylinder sleeve and high-pressure plunger pump.
Described end cap is plastic material or composite material quality.
Described oil distribution casing is by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping.
Described oil distribution casing is full copper material, or oil distribution casing contacts end face and is covered with layer of copper layer with cylinder body.
Described inner sleeve, overcoat, return plate, flange plate and/or piston shoes are by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping.
Pump case of the present invention, pump housing neck or end cap are plastic material or composite material quality, and composite material is that one or more of glass fiber reinforced plastics composite material, glass fiber compound material, carbon fiber resin composite material, ceramic fibrous composite material and thermoplastic resin based composite material etc. form the structure material of above-mentioned pump case, pump housing neck or end cap.Any in the DMC material of pump case of the present invention, pump housing neck or the preferred sheet molding compound of end cap, BMC (BMC) or fire-proof.
Advantage of the present invention is: manufacturing efficiency is high, and cost of production greatly reduces, and wear-resisting property is good, lightweight, easy to maintenance, and quality of product is good.
Accompanying drawing explanation
Fig. 1 is cylinder body prior art structural representation.
Fig. 2 is the worm's eye view of Fig. 1.
Fig. 3 is the structural representation of the embodiment of the present invention 1.
Fig. 4 is the pump body structure schematic diagram of the embodiment of the present invention 1.
Fig. 5 is Fig. 4 side structure schematic diagram.
Fig. 6 is the housing structure schematic diagram of the embodiment of the present invention 1,2,5,7.
Fig. 7 is the structural representation of the embodiment of the present invention 2.
Fig. 8 is the pump body structure schematic diagram of the embodiment of the present invention 2.
Fig. 9 is Fig. 8 side structure schematic diagram.
Figure 10 is the embodiment of the present invention 3,4,6,8 housing structure schematic diagram.
Figure 11 is the embodiment of the present invention 3 cylinder body position views.
Figure 12 is the cylinder body position view of the embodiment of the present invention 4.
Figure 13 is the structural representation of the embodiment of the present invention 5.
Figure 14 is the pump housing metal part-structure schematic diagram of the embodiment of the present invention 5.
Figure 15 is the structural representation of the embodiment of the present invention 6.
Figure 16 is the pump housing metal part-structure schematic diagram of the embodiment of the present invention 6.
Figure 17 is the structural representation of the embodiment of the present invention 7.
Figure 18 is the structural representation of the embodiment of the present invention 8.
Wherein: 1, the pump housing, 2, pump case, 3, end cap, 4, pump housing neck, 5, pump housing ring portion, 6, oil outlet, 7, filler opening, 8, step surface, 9, positioning hole, 10, lubrication hole, 11, crescent, 12, return opening, 13, oil distribution casing, 14, cylinder body, 15, bearing, 16, cylinder body body, 17, plunger hole, 18, fixed hole, 19, the fixing inserts of metal, 20, fixing ear, 21, cylinder sleeve, 22, inner sleeve, 23, overcoat, 24, return plate, 25, swash plate, 26, piston shoes, 27, flange plate.
Embodiment
As Fig. 3, 4, shown in 5 and 6, Novel high-pressure plunger pump of the present invention, comprises the pump housing 1, pump case 2, end cap 3 and flange plate 27, the pump housing 1 comprises pump housing neck 4, pump housing ring portion 5, open oil outlet 6 and filler opening 7 in pump housing ring portion 5 both sides, pump housing neck 4 is fixedly connected with flange plate 27, on the end step surface 8 of pump housing ring portion 5, has positioning hole 9, lubrication hole 10 and two crescents 11, pump case 2 is fixedly connected with end cap 3, and pump case 2 has return opening 12 near the bi-side of end cap 3, and pump case 2 is built-in with oil distribution casing 13, cylinder body 14, bearing 15, inner sleeve 22, overcoat 23, return plate 24, swash plate 25 and piston shoes 26, return plate 24 is fixed on swash plate 25, inner sleeve 22 is located in the plunger hole 17 of cylinder body body 16, overcoat 23 is located at plunger hole 17 outsides, cylinder body 14 front-end faces coordinate with oil distribution casing 13, pump case 2 is plastic material or composite material quality, pump housing ring portion 5 is coated and fixed by pump case 2, the oil outlet 6 of the described pump housing 1 and the side of filler opening 7 are coated and fixed by pump case 2 and open in pump case 2 bi-side at the opening of pump case 2, pump case 2 bottom evens have 4 fixed holes 18, and fixed hole 18 has been embedded in fixedly inserts 19 of metal, cylinder body 14 is comprised of cylinder body body 16, and cylinder body body 16 is cylinder type, and cylinder body body 16 directly coordinates with the bearing 15 of high-pressure plunger pump.Cylinder body body 16, by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping, has 5-12 plunger hole 17 in cylinder body body 16.
As Fig. 6, 7, shown in 8 and 9, Novel high-pressure plunger pump of the present invention, comprises the pump housing 1, pump case 2, end cap 3 and flange plate 27, the pump housing 1 comprises pump housing neck 4, pump housing ring portion 5, open oil outlet 6 and filler opening 7 in pump housing ring portion 5 both sides, pump housing neck 4 is fixedly connected with flange plate 27, on the end step surface 8 of pump housing ring portion 5, has positioning hole 9, lubrication hole 10 and two crescents 11, pump case 2 is fixedly connected with end cap 3, and pump case 2 has return opening 12 near the bi-side of end cap 3, and pump case 2 is built-in with oil distribution casing 13, cylinder body 14, bearing 15, inner sleeve 22, overcoat 23, return plate 24, swash plate 25 and piston shoes 26, return plate 24 is fixed on swash plate 25, inner sleeve 22 is located in the plunger hole 17 of cylinder body body 16, overcoat 23 is located at plunger hole 17 outsides, cylinder body 14 front-end faces coordinate with oil distribution casing 13, pump case 2 is plastic material or composite material quality, pump housing ring portion 5 is coated and fixed by pump case 2, pump housing ring portion 5 sides between oil outlet 6 and filler opening 7 have symmetrical 4 fixing ears 20, fixedly ear 20 is connected with pump housing ring portion 5 one, fixedly ear 20 is coated by pump case 2, and fixedly ear 20 is opened on pump case 2 bottoms.The present embodiment housing structure is with embodiment 1, as shown in Figure 6.
As shown in FIG. 10 and 11, cylinder body 14 comprises cylinder body body 16 and cylinder sleeve 21, cylinder body body 16 is with cylinder sleeve 21 by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping, and cylinder body body 16 and cylinder sleeve 21 are structure as a whole, and cylinder sleeve 21 coordinates with the bearing 15 of high-pressure plunger pump.All the other structures are with embodiment 1.
As shown in Figure 10 and 12, cylinder body 14 of the present invention comprises cylinder body body 16 and cylinder sleeve 21, cylinder body body 16 is with cylinder sleeve 21 by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping, and cylinder body body 16 and cylinder sleeve 21 are structure as a whole, and cylinder sleeve 21 coordinates with the bearing 15 of high-pressure plunger pump.All the other structures are with embodiment 2.
As shown in Fig. 6,13 and 14, pump housing neck 4 of the present invention is plastic material or composite material quality, and pump housing neck 4 is connected with pump case 2 one, and pump housing ring portion 5 is coated and fixed by pump case 2 and pump housing neck 4.Cylinder body 14 is comprised of cylinder body body 16, and cylinder body body 16 is cylinder type, and cylinder body body 16 directly coordinates with the bearing 15 of high-pressure plunger pump.Cylinder body body 16, by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping, has 5-12 plunger hole 17 in cylinder body body 16.All the other structures are with embodiment 1.
As shown in Figure 10,15 and 16, pump housing neck 4 of the present invention is plastic material or composite material quality, and pump housing neck 4 is connected with pump case 2 one, and pump housing ring portion is coated and fixed by pump case and pump housing neck.Pump case 2 is plastic material or composite material quality, pump housing ring portion 5 is coated and fixed by the pump case 2 of plastic material or composite material quality, pump housing ring portion 5 sides between oil outlet 6 and filler opening 7 have symmetrical 4 fixing ears 20, fixedly ear 20 is connected with pump housing ring portion 5 one, fixedly ear 20 is coated by pump case 2, and fixedly ear 20 is opened on pump case 2 bottoms.Cylinder body 14 comprises cylinder body body 16 and cylinder sleeve 21, and cylinder body body 16 is with cylinder sleeve 21 by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping, and cylinder body body 16 and cylinder sleeve 21 are structure as a whole, and cylinder sleeve 21 coordinates with the bearing 15 of high-pressure plunger pump.
As shown in Fig. 6,16 and 17, pump housing neck 4 of the present invention is plastic material or composite material quality, pump housing neck 4 is connected with pump case 2 one, pump housing ring portion 5 is coated and fixed by pump case 2 and pump housing neck 4, cylinder body 14 is comprised of cylinder body body 16, cylinder body body 16 is cylinder type, and cylinder body body 16 directly coordinates with the bearing 15 of high-pressure plunger pump.Cylinder body body 16, by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping, has 5-12 plunger hole 17 in cylinder body body 16.Pump housing ring portion 5 sides between oil outlet 6 and filler opening 7 have symmetrical 4 fixing ears 20, and fixedly ear 20 is connected with pump housing ring portion 5 one, and fixedly ear 20 is coated by pump case 2, and fixedly ear 20 is opened on pump case 2 bottoms.
As shown in Figure 14,10 and 18, pump housing neck 4 of the present invention is plastic material or composite material quality, and pump housing neck 4 is connected with pump case 2 one, and pump housing ring portion 5 is coated and fixed by pump case 2 and pump housing neck 4.Cylinder body 14 comprises cylinder body body 16 and cylinder sleeve 21, and cylinder body body 16 is with cylinder sleeve 21 by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping, and cylinder body body 16 and cylinder sleeve 21 are structure as a whole, and cylinder sleeve 21 coordinates with the bearing 15 of high-pressure plunger pump.Pump case 2 bottom evens have 4 fixed holes 18, and fixed hole 18 has been embedded in fixedly inserts 19 of metal.
As shown in Figure 5, the end step surface 8 of pump housing ring portion 5 of the present invention is one deck, is convenient to machining and the maintenance of step surface 8, and all the other structures are the same.
As a further improvement on the present invention, end cap 3 is plastic material or composite material quality, and this structure can effectively reduce production costs, and its mechanical strength can be configured raising as required.All the other structures are the same.
As a further improvement on the present invention, oil distribution casing 13 is full copper material, or oil distribution casing 13 contacts end face with cylinder body 14 and is covered with layer of copper layer.All the other structures are the same.
As a further improvement on the present invention, inner sleeve 22, overcoat 23, return plate 24, flange plate 27 and/or piston shoes 26 are by powder metallurgy disposal pressed moulding.All the other structures are the same.
Pump case 2 of the present invention, pump housing neck 4 or end cap 3 are plastic material or composite material quality, and composite material is that one or more of glass fiber reinforced plastics composite material, glass fiber compound material, carbon fiber resin composite material, ceramic fibrous composite material and thermoplastic resin based composite material etc. form the structure material of above-mentioned pump case 2, pump housing neck 4 or end cap 3.Any in the DMC material of pump case 2 of the present invention, pump housing neck 4 or the preferred sheet molding compound of end cap 3, BMC (BMC) or fire-proof.The application of above-mentioned material can effectively reduce production costs, and its mechanical strength can be configured raising as required.
The present invention is applied to plastic material or composite material quality on high-pressure plunger pump cleverly, greatly reduced cost of production, also improved the mechanical property of high-pressure plunger pump, its mechanical strength can reach existing steel material or cast iron materials structure three times, has also alleviated the overall weight of high-pressure plunger pump simultaneously.
The present invention has cancelled the cylinder body end face copper layer 3 ' of original cylinder body and the copper sheathing 5 ' in plunger hole, cylinder body body 16 is structure as a whole by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping with cylinder sleeve 21, and cylinder sleeve 21 coordinates with the bearing 15 of high-pressure plunger pump.In the situation that not changing cylinder body body 16 with cylinder sleeve 21 cooperating structure, greatly reduce cost of production like this, owing to having adopted powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping, processing technology is simple, but has kept the wear-resisting property of cylinder body.The present invention by cylinder body 14 by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping, production technology has been simplified greatly, and its cost of production is half of existing bimetal material-structure, and wear-resisting property is also doubled, it is simple that cylinder body 14 structures become, and weight has also alleviated half.
The present invention has done multiple variation to the pump housing 1 structure; all in order to carry out under the prerequisite not changing mechanical strength or raising mechanical strength; the weight of the pump housing 1 is reduced greatly; weight is only original 1/3rd; the cost of production of the pump housing is reduced to 1/4th of prior art; can form large-scale production, manufacturing efficiency greatly improves.Wherein several embodiments of the present invention use the pump housing neck 4 of the pump housing 1 instead plastics or composite material quality is made, and pump case 2 also adopts plastics or composite material quality to make.
The pump housing of the present invention carries out putting into lower mould after machining, then plastics or composite material are poured in lower mould, patrix presses counterdie, after 130-180 ℃ of high temperature carries out insulation processing in 15-30 minute, mention patrix, the pump housing 1 and pump case 2 form one, next step assembling inner body step that enters to be cooled later, last and end cap 3 is fixed, and completes complete machine and produces.
Advantage of the present invention is: manufacturing efficiency is high, and cost of production greatly reduces, and wear-resisting property is good, lightweight, easy to maintenance, and quality of product is good.
Claims (10)
1. Novel high-pressure plunger pump, comprise the pump housing, pump case, end cap and flange plate, the described pump housing comprises pump housing neck, pump housing ring portion, open in oil outlet and the filler opening of pump housing ring portion both sides, on the end step surface of described pump housing ring portion, have positioning hole, lubrication hole and two crescents, described pump housing neck is fixedly connected with flange plate, described pump case is fixedly connected with end cap, described pump case has return opening near the bi-side of end cap, described pump case is built-in with oil distribution casing, cylinder body, bearing, inner sleeve, overcoat, return plate, swash plate and piston shoes, described return plate is fixed on swash plate, inside be sheathed in the plunger hole of cylinder body body, the described outer plunger hole outside that is sheathed on, described cylinder body front-end face and oil distributing plate combining, it is characterized in that: described pump case is plastic material or composite material quality, described pump housing ring portion is coated and fixed by pump case, the oil outlet of the described pump housing and the side of filler opening are coated and fixed by pump case and open in pump case bi-side at the opening of pump case, described cylinder body comprises cylinder body body, and described cylinder body body, by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping, has 5-12 plunger hole in described cylinder body body.
2. Novel high-pressure plunger pump according to claim 1, is characterized in that described pump case bottom even has 4 fixed holes, and described fixed hole has been embedded in fixedly inserts of metal; Or the pump housing ring portion side between described oil outlet and filler opening has symmetrical 4 fixing ears, described fixedly ear is connected with pump housing ring portion one, and described fixedly ear is coated by pump case, and described fixedly ear is opened on bottom pump case.
3. Novel high-pressure plunger pump according to claim 1 and 2, the end step surface that it is characterized in that described pump housing ring portion is one deck.
4. Novel high-pressure plunger pump according to claim 1, is characterized in that described pump housing neck is plastic material or composite material quality, and described pump housing neck is connected with pump case one, and pump housing ring portion is coated and fixed by pump case and pump housing neck.
5. Novel high-pressure plunger pump according to claim 1, is characterized in that described cylinder body is comprised of cylinder body body, and described cylinder body body is cylinder type, and described cylinder body body directly and the bearing fit of high-pressure plunger pump.
6. Novel high-pressure plunger pump according to claim 1, it is characterized in that described cylinder body also comprises cylinder sleeve, described cylinder sleeve is by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping, and described cylinder body body and cylinder sleeve are structure as a whole, the bearing fit of described cylinder sleeve and high-pressure plunger pump.
7. Novel high-pressure plunger pump according to claim 1, is characterized in that described end cap is plastic material or composite material quality.
8. Novel high-pressure plunger pump according to claim 1, is characterized in that described oil distribution casing is by powder metallurgy disposal pressed moulding or spheroidal graphite cast iron machine shaping.
9. Novel high-pressure plunger pump according to claim 1, is characterized in that described oil distribution casing is full copper material, or oil distribution casing contacts end face and is covered with layer of copper layer with cylinder body.
10. Novel high-pressure plunger pump according to claim 1, is characterized in that described inner sleeve, overcoat, return plate, flange plate and/or piston shoes are by powder metallurgy disposal pressed moulding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110134433.2A CN102155368B (en) | 2011-05-24 | 2011-05-24 | High-pressure plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110134433.2A CN102155368B (en) | 2011-05-24 | 2011-05-24 | High-pressure plunger pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102155368A CN102155368A (en) | 2011-08-17 |
| CN102155368B true CN102155368B (en) | 2014-03-05 |
Family
ID=44436996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110134433.2A Expired - Fee Related CN102155368B (en) | 2011-05-24 | 2011-05-24 | High-pressure plunger pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN102155368B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013108407A1 (en) | 2013-08-05 | 2015-02-05 | Linde Hydraulics Gmbh & Co. Kg | Hydrostatic axial piston machine |
| CN106216657B (en) * | 2016-07-27 | 2018-05-22 | 合肥波林新材料股份有限公司 | A kind of plunger pump backhaul disc manufacturing method |
| CN108412718A (en) * | 2018-04-09 | 2018-08-17 | 张家港市海工船舶机械制造有限公司 | A kind of double plunger pump of high-performance |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1355325A (en) * | 1971-12-27 | 1974-06-05 | Aisin Seiki | Hydraulic axial plunger pumps or motors |
| DE19613609A1 (en) * | 1996-04-04 | 1997-10-09 | Brueninghaus Hydromatik Gmbh | Axial piston machine with internal flushing circuit |
| CN2541624Y (en) * | 2001-10-18 | 2003-03-26 | 邵阳液压有限责任公司 | Plunger pump |
| CN2854121Y (en) * | 2005-11-14 | 2007-01-03 | 杨徐辉 | Low noise axial plunger pump |
| WO2008074499A1 (en) * | 2006-12-19 | 2008-06-26 | Robert Bosch Gmbh | Hollow piston for an axial piston machine |
| CN202073732U (en) * | 2011-05-24 | 2011-12-14 | 钱永平 | Novel high-pressure plunger pump |
-
2011
- 2011-05-24 CN CN201110134433.2A patent/CN102155368B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1355325A (en) * | 1971-12-27 | 1974-06-05 | Aisin Seiki | Hydraulic axial plunger pumps or motors |
| DE19613609A1 (en) * | 1996-04-04 | 1997-10-09 | Brueninghaus Hydromatik Gmbh | Axial piston machine with internal flushing circuit |
| CN2541624Y (en) * | 2001-10-18 | 2003-03-26 | 邵阳液压有限责任公司 | Plunger pump |
| CN2854121Y (en) * | 2005-11-14 | 2007-01-03 | 杨徐辉 | Low noise axial plunger pump |
| WO2008074499A1 (en) * | 2006-12-19 | 2008-06-26 | Robert Bosch Gmbh | Hollow piston for an axial piston machine |
| CN202073732U (en) * | 2011-05-24 | 2011-12-14 | 钱永平 | Novel high-pressure plunger pump |
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| Publication number | Publication date |
|---|---|
| CN102155368A (en) | 2011-08-17 |
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