CN103883493B - The axial piston pump that a kind of cylinder body is static - Google Patents
The axial piston pump that a kind of cylinder body is static Download PDFInfo
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- CN103883493B CN103883493B CN201410104375.2A CN201410104375A CN103883493B CN 103883493 B CN103883493 B CN 103883493B CN 201410104375 A CN201410104375 A CN 201410104375A CN 103883493 B CN103883493 B CN 103883493B
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Abstract
The axial piston pump that a kind of cylinder body is static, cylinder body is fixed, when rotating under the drive of swash plate at transmission shaft, the plunger in each plunger cavity by under the effect of spring force, hydraulic coupling and swash plate thrust, to-and-fro motion vertically, when plunger is pushed plunger cavity by the inclined-plane of swash plate, the volume of this plunger cavity reduces, and fluid, by logical oil groove, flows to force feed arc groove, and then successively by force feed axis hole and force feed annular groove, finally flow out from oil outlet; When plunger is released plunger cavity by spring, the volume of this plunger cavity increases, fluid is inhaled into plunger cavity by oil inlet hole, oil suction annular groove, oil suction axis hole, oil suction arc groove and logical oil groove successively, all plunger cavities on cylinder body work simultaneously, namely realize continuously discharging from oil inlet hole oil suction from oil outlet, the present invention has compact structure, transmission is simple, rotary inertia is little and can realize the advantage of huge discharge.
Description
Technical field
The invention belongs to axial plunger hydraulic pump technical field, be specifically related to the axial piston pump that a kind of cylinder body is static.
Background technique
Oil hydraulic pump is the important component part of hydraulic system, and the oil hydraulic pump of function admirable is the important guarantee that hydraulic system can be stablized, work efficiently.In engineering hydraulic system, the most frequently used oil hydraulic pump is axial piston pump.It is the volume type oil hydraulic pump that a class plunger is parallel to transmission shaft and arranges, has that structure is simple, volume is little, noise is low, efficiency is high, the life-span is long and have the advantages such as suction capacity.
The working principle of traditional axial piston pump is normally: transmission shaft directly or indirectly drives cylinder body to rotate, the plunger installed in cylinder body is under the driving of stationary swash plate, to-and-fro motion in plunger cavity, thus the volume periodically changing plunger cavity, realize the action of oil suction and force feed.Because plunger cavity rotates with transmission shaft, therefore total rotary inertia of pump is larger, start and stop and the speed governing speed of response of pump are slower, be unfavorable for the output flow directly regulating pump by controlling rotating speed, and because fluid is with cylinder body high speed rotating, fluid is inner easily produces cavitation erosion and temperature rise, thus is unfavorable for the volumetric efficiency and the capacity usage ratio that improve pump.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the invention is to propose the static axial piston pump of a kind of cylinder body, there is compact structure, transmission is simple, rotary inertia is little and can realize the advantage of huge discharge.
In order to achieve the above object, the technological scheme that the present invention takes is:
The axial piston pump that a kind of cylinder body is static, comprise pump case 1, cylinder body 21 is fixedly mounted in pump case 1, cylinder body 21 realizes the location of circumferential and axial respectively by the shoulder in the first key 11 and pump case 1, first pump end cap 12 is arranged in pump case 1, is fixed by cylinder body 21, and the first axle head gland 15 is arranged on the first pump end cap 12, second pump end cap 2 is arranged on the opposite side of pump case 1, and the second axle head gland 3 is arranged on the second pump end cap 2;
Cylinder body 21 has plural plunger hole 20, plunger hole 20 is parallel to cylinder body 21 axis, and be evenly distributed on circumferentially same, a plunger 10 is installed in each plunger hole 20, plunger 10 can reciprocatingly slide in plunger hole 20, in each plunger hole 20, spring 13 is also installed, spring 13 withstands the bottom of plunger 10, the head of plunger 10 is spherical, piston shoes 9 are installed above, piston shoes 9 can do the rotation of respective angles on plunger 10, the side of cylinder body 21 has plural logical oil groove 16, logical oil groove 16 distributes radially, be communicated with each plunger hole 20 respectively,
Transmission shaft 5 is through cylinder body 21 axis, be arranged on the inside of pump case 1, swash plate 8 is arranged on transmission shaft 5 by the second key 6, and be bearing in pump case 1 by the second rolling bearing 7, the part that transmission shaft 5 inserts the first pump end cap 12 is bearing on the first pump end cap 12 by the first rolling bearing 17, drive shaft seal lid 14 is arranged on the axle head of this side, the inner ring of the first rolling bearing 17 is pressed on the shoulder of transmission shaft 5, the outer ring of the first rolling bearing 17 is against on the first axle head gland 15, realize the axially locating of this side, 3rd rolling bearing 4 is installed from the other end of transmission shaft 5, transmission shaft 5 is pressed on the shoulder of this side by the second axle head gland 3, the axially locating of transmission shaft 5 is jointly realized with the first rolling bearing 17, second rolling bearing 7 outer ring is pressed on the shoulder in pump case 1 by the second pump end cap 2, the inner ring of the second rolling bearing 7 is pressed on the shoulder of swash plate 8, swash plate 8 is pressed on the shoulder of transmission shaft 5, realize the axially locating of swash plate 8, plunger 10 and piston shoes 9 are released by spring 13, piston shoes 9 are pressed on the inclined-plane of swash plate 8, can relative sliding,
One end that transmission shaft 5 inserts the first pump end cap 12 has axial oil suction axis hole 24 and force feed axis hole 23, on transmission shaft 5 with logical oil groove 16 in conplane position, have oil suction arc groove 25 and the force feed arc groove 22 of mutually isolated circular arc, the symmetry plane of oil suction arc groove 25 and force feed arc groove 22 and the symmetry plane of swash plate 8 are same plane, oil suction arc groove 25 is communicated with oil suction axis hole 24, force feed arc groove 22 is communicated with force feed axis hole 23, insert in the part of the first pump end cap 12 at transmission shaft 5, also have force feed annular groove 26 and oil suction annular groove 27, force feed annular groove 26 and force feed axis hole 23 UNICOM, oil suction annular groove 27 is communicated with oil suction axis hole 24,
First pump end cap 12 has oil inlet hole 18 and oil outlet 19, oil inlet hole 18 is communicated with the oil suction annular groove 27 on transmission shaft 5, and oil outlet 19 is communicated with the force feed annular groove 26 on transmission shaft 5.
Span between described oil suction arc groove 25 and force feed arc groove 22 is not less than plunger hole 20 diameter.
The present invention has the following advantages:
1) compact structure, transmission is simple.The cylinder body 21 of this pump is provided with plural plunger 10 vertically, and transmission shaft 5 has the effect of flow simultaneously, the space in the pump case 1 made full use of.Each part location is reliable, and how the supporting of moving element realizes by rolling bearing, and frictional force is little, stable working.
2) rotary inertia is little, is active in one's movements.Elastic force drive plunger 10 to-and-fro motion of the thrust that this pump is produced by the rotation of swash plate 8 and spring 13, cylinder body 21 is fixed, and does not rotate, thus reduces the rotary inertia of pump, be beneficial to the occasion being used in and needing pump speed governing with transmission shaft 5.
3) huge discharge can be realized.Because plunger 10 is not around drive axis, therefore do not produce centrifugal force, piston shoes 9 and swash plate 8 inclined-plane can realize good laminating, and therefore, larger numerical value can be got in swash plate 8 inclination angle, thus strengthen the stroke of plunger 10, improve discharge capacity.
Accompanying drawing explanation
Fig. 1 is axial sectional view of the present invention.
Fig. 2 is the structural drawing of the end face of cylinder body 21 in the present invention.
Fig. 3 is the structural drawing of transmission shaft 5 in the present invention.
Fig. 4 is the sectional view in the A-A cross section of Fig. 3 of the present invention.
Fig. 5 is the sectional view in the B-B cross section of Fig. 3 of the present invention.
Fig. 6 is the sectional view in the C-C cross section of Fig. 3 of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
With reference to Fig. 1, the axial piston pump that a kind of cylinder body 21 is static, comprise pump case 1, cylinder body 21 is fixedly mounted in pump case 1, and cylinder body 21 realizes the location of circumferential and axial respectively by the shoulder in the first key 11 and pump case 1, and the first pump end cap 12 is arranged in pump case 1, cylinder body 21 is fixed, first axle head gland 15 is arranged on the first pump end cap 12, and the second pump end cap 2 is arranged on the opposite side of pump case 1, and the second axle head gland 3 is arranged on the second pump end cap 2;
See figures.1.and.2, cylinder body 21 has plural plunger hole 20, plunger hole 20 is parallel to cylinder body 21 axis, and is evenly distributed on circumferentially same, is provided with a plunger 10 in each plunger hole 20, plunger 10 can reciprocatingly slide in plunger hole 20, also be provided with spring 13 in each plunger hole 20, spring 13 withstands the bottom of plunger 10, and the head of plunger 10 is spherical, be provided with piston shoes 9 above, piston shoes 9 can do the rotation of respective angles on plunger 10; The side of cylinder body 21 has plural logical oil groove 16, and logical oil groove 16 distributes radially, is communicated with respectively with each plunger hole 20.Have grease chamber bottom piston shoes 9, plunger 10 and piston shoes 9 center all have pore, the hydraulic oil in plunger 10 chamber can be caused the grease chamber bottom piston shoes 9, play lubrication and balance pressure.
With reference to Fig. 1, transmission shaft 5 is through cylinder body 21 axis, be arranged on the inside of pump case 1, swash plate 8 is arranged on transmission shaft 5 by the second key 6, and be bearing in pump case 1 by the second rolling bearing 7, the part that transmission shaft 5 inserts the first pump end cap 12 is bearing on the first pump end cap 12 by the first rolling bearing 17, drive shaft seal lid 14 is arranged on the axle head of this side, the inner ring of the first rolling bearing 17 is pressed on the shoulder of transmission shaft 5, the outer ring of the first rolling bearing 17 is against on the first axle head gland 15, realize the axially locating of this side, 3rd rolling bearing 4 is installed from the other end of transmission shaft 5, transmission shaft 5 is pressed on the shoulder of this side by the second axle head gland 3, the axially locating of transmission shaft 5 is jointly realized with the first rolling bearing 17, second rolling bearing 7 outer ring is pressed on the shoulder in pump case 1 by the second pump end cap 2, the inner ring of the second rolling bearing 7 is pressed on the shoulder of swash plate 8, swash plate 8 is pressed on the shoulder of transmission shaft 5, realize the axially locating of swash plate 8, plunger 10 and piston shoes 9 are released by spring 13, piston shoes 9 are pressed on the inclined-plane of swash plate 8, can relative sliding.
With reference to Fig. 1, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, one end that transmission shaft 5 inserts the first pump end cap 12 has axial oil suction axis hole 24 and force feed axis hole 23, on transmission shaft 5 with logical oil groove 16 on conplane position, have oil suction arc groove 25 and the force feed arc groove 22 of mutually isolated circular arc, the symmetry plane of oil suction arc groove 25 and force feed arc groove 22 and the symmetry plane of swash plate 8 are same plane, thus make for same plunger 10, when swash plate 8 is pushed plunger hole 20, the logical oil groove 16 be connected with it just goes to and is communicated with the force feed arc groove 22 on transmission shaft 5, when plunger 10 is released plunger hole 20 by spring 13, the logical oil groove 16 be connected with it just goes to and is communicated with the oil suction arc groove 25 on transmission shaft 5, span between oil suction arc groove 25 and force feed arc groove 22 is not less than plunger hole 20 diameter, oil suction arc groove 25 is communicated with oil suction axis hole 24, force feed arc groove 22 is communicated with force feed axis hole 23, insert in the part of the first pump end cap 12 at transmission shaft 5, also have force feed annular groove 26 and oil suction annular groove 27, force feed annular groove 26 and force feed axis hole 23 UNICOM, oil suction annular groove 27 is communicated with oil suction axis hole 24.
With reference to Fig. 1, the first pump end cap 12 has oil inlet hole 18 and oil outlet 19, oil inlet hole 18 is communicated with the oil suction annular groove 27 on transmission shaft 5, and oil outlet 19 is communicated with the force feed annular groove 26 on transmission shaft 5.By oil inlet hole 18 and oil outlet 19, realize the connection of oil circuit and outside oil circuit in pump.
Working principle of the present invention: cylinder body 21 is fixed, when swash plate 8 rotates under the drive of transmission shaft 5, the plunger 10 in each plunger 10 chamber by under the effect of spring 13 power, hydraulic coupling and swash plate 8 thrust, to-and-fro motion vertically.When plunger 10 is pushed plunger 10 chamber by the inclined-plane of swash plate 8, the volume in this plunger 10 chamber reduces, and fluid, by logical oil groove 16, flows to force feed arc groove 22, and then successively by force feed axis hole 23 and force feed annular groove 26, finally flows out from oil outlet 19; When plunger 10 is released plunger 10 chamber by spring 13 (swash plate 8 inclined-plane is close to by piston shoes 9), the volume in this plunger 10 chamber increases, and fluid is inhaled into plunger 10 chamber by oil inlet hole 18, oil suction annular groove 27, oil suction axis hole 24, oil suction arc groove 25 and logical oil groove 16 successively.All plungers 10 chamber on cylinder body 21 works simultaneously, namely realizes continuously discharging from oil inlet hole 18 oil suction from oil outlet 19.
Claims (2)
1. the axial piston pump that a cylinder body is static, comprise pump case (1), it is characterized in that: cylinder body (21) is fixedly mounted in pump case (1), cylinder body (21) realizes the location of circumferential and axial respectively by the shoulder on the first key (11) and pump case (1), first pump end cap (12) is arranged in pump case (1), cylinder body (21) is fixed, first axle head gland (15) is arranged on the first pump end cap (12), second pump end cap (2) is arranged on the opposite side of pump case (1), second axle head gland (3) is arranged on the second pump end cap (2),
Cylinder body (21) has plural plunger hole (20), plunger hole (20) is parallel to cylinder body (21) axis, and be evenly distributed on circumferentially same, a plunger (10) is installed in each plunger hole (20), plunger (10) can reciprocatingly slide in plunger hole (20), spring (13) is also installed in each plunger hole (20), spring (13) withstands the bottom of plunger (10), the head of plunger (10) is spherical, piston shoes (9) are installed above, piston shoes (9) can do the rotation of respective angles on plunger (10), the side of cylinder body (21) has plural logical oil groove (16), logical oil groove (16) distributes radially, be communicated with each plunger hole (20) respectively,
Transmission shaft (5) is through cylinder body (21) axis, be arranged on the inside of pump case (1), swash plate (8) is arranged on transmission shaft (5) by the second key (6), and be bearing in pump case (1) by the second rolling bearing (7), the part that transmission shaft (5) inserts the first pump end cap (12) is bearing on the first pump end cap (12) by the first rolling bearing (17), drive shaft seal lid (14) is arranged on the axle head of this side, the inner ring of the first rolling bearing (17) is pressed on the shoulder of transmission shaft (5), the outer ring of the first rolling bearing (17) is against on the first axle head gland (15), realize the axially locating of this side, 3rd rolling bearing (4) is installed from the other end of transmission shaft (5), transmission shaft (5) is pressed on the shoulder of this side by the second axle head gland (3), the axially locating of transmission shaft (5) is jointly realized with the first rolling bearing (17), second rolling bearing (7) outer ring is pressed on the shoulder in pump case (1) by the second pump end cap (2), the inner ring of the second rolling bearing (7) is pressed on the shoulder of swash plate (8), swash plate (8) is pressed on the shoulder of transmission shaft (5), realize the axially locating of swash plate (8), plunger (10) and piston shoes (9) are released by spring (13), piston shoes (9) are pressed on the inclined-plane of swash plate (8), can relative sliding,
One end that transmission shaft (5) inserts the first pump end cap (12) has axial oil suction axis hole (24) and force feed axis hole (23), transmission shaft (5) is gone up with logical oil groove (16) in conplane position, have oil suction arc groove (25) and the force feed arc groove (22) of mutually isolated circular arc, the symmetry plane of oil suction arc groove (25) and force feed arc groove (22) and the symmetry plane of swash plate (8) are same plane, oil suction arc groove (25) is communicated with oil suction axis hole (24), force feed arc groove (22) is communicated with force feed axis hole (23), insert in the part of the first pump end cap (12) at transmission shaft (5), also have force feed annular groove (26) and oil suction annular groove (27), force feed annular groove (26) and force feed axis hole (23) UNICOM, oil suction annular groove (27) is communicated with oil suction axis hole (24),
First pump end cap (12) has oil inlet hole (18) and oil outlet (19), oil inlet hole (18) is communicated with the oil suction annular groove (27) on transmission shaft (5), and oil outlet (19) is communicated with the force feed annular groove (26) on transmission shaft (5).
2. the axial piston pump that a kind of cylinder body according to claim 1 is static, is characterized in that: the span between described oil suction arc groove (25) and force feed arc groove (22) is not less than plunger hole (20) diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410104375.2A CN103883493B (en) | 2014-03-20 | 2014-03-20 | The axial piston pump that a kind of cylinder body is static |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410104375.2A CN103883493B (en) | 2014-03-20 | 2014-03-20 | The axial piston pump that a kind of cylinder body is static |
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| Publication Number | Publication Date |
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| CN103883493A CN103883493A (en) | 2014-06-25 |
| CN103883493B true CN103883493B (en) | 2015-12-09 |
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| CN201410104375.2A Active CN103883493B (en) | 2014-03-20 | 2014-03-20 | The axial piston pump that a kind of cylinder body is static |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105201936A (en) * | 2014-10-16 | 2015-12-30 | 徐州重型机械有限公司 | Hydraulic system and crane |
| CN106801733A (en) * | 2015-11-26 | 2017-06-06 | 熵零股份有限公司 | A kind of hydraulic mechanism |
| CN106801732A (en) * | 2015-11-26 | 2017-06-06 | 熵零股份有限公司 | A kind of hydraulic mechanism |
| CN112901464B (en) * | 2019-12-03 | 2024-06-04 | 苑亚忠 | Two-stage plunger pump |
| CN112049768B (en) * | 2020-09-11 | 2022-04-29 | 芜湖西南机械有限公司 | High-precision variable axial plunger pump |
| CN113339222B (en) * | 2021-07-20 | 2024-07-23 | 安徽理工大学 | Double-row axial plunger pump based on digital variable |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB294081A (en) * | 1928-02-01 | 1928-07-19 | Tubize Artificial Silk Company | Improvements in multicylinder pumps |
| GB517210A (en) * | 1938-08-27 | 1940-01-23 | Integral Aux Y Equipment Ltd | A rotary hydraulic intensifier |
| DE1099357B (en) * | 1958-04-25 | 1961-02-09 | Heinrich Hemme | Axial piston pump with low and high pressure part |
| US2997962A (en) * | 1958-05-08 | 1961-08-29 | Gen Motors Corp | Pump |
| US3498227A (en) * | 1967-06-14 | 1970-03-03 | Yasuo Kita | Axial plunger pump |
| US3811797A (en) * | 1971-07-29 | 1974-05-21 | Lucas Industries Ltd | Fuel pumps for use in conduction with gas turbine engines |
| CN103527437A (en) * | 2012-07-04 | 2014-01-22 | 北京精密机电控制设备研究所 | High-pressure and high-speed valve flow distributing axial plunger pump |
-
2014
- 2014-03-20 CN CN201410104375.2A patent/CN103883493B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB294081A (en) * | 1928-02-01 | 1928-07-19 | Tubize Artificial Silk Company | Improvements in multicylinder pumps |
| GB517210A (en) * | 1938-08-27 | 1940-01-23 | Integral Aux Y Equipment Ltd | A rotary hydraulic intensifier |
| DE1099357B (en) * | 1958-04-25 | 1961-02-09 | Heinrich Hemme | Axial piston pump with low and high pressure part |
| US2997962A (en) * | 1958-05-08 | 1961-08-29 | Gen Motors Corp | Pump |
| US3498227A (en) * | 1967-06-14 | 1970-03-03 | Yasuo Kita | Axial plunger pump |
| US3811797A (en) * | 1971-07-29 | 1974-05-21 | Lucas Industries Ltd | Fuel pumps for use in conduction with gas turbine engines |
| CN103527437A (en) * | 2012-07-04 | 2014-01-22 | 北京精密机电控制设备研究所 | High-pressure and high-speed valve flow distributing axial plunger pump |
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| CN103883493A (en) | 2014-06-25 |
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