CN216077453U - Double-bearing high-pressure plunger pump capable of improving rotation stability - Google Patents
Double-bearing high-pressure plunger pump capable of improving rotation stability Download PDFInfo
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- CN216077453U CN216077453U CN202121923419.6U CN202121923419U CN216077453U CN 216077453 U CN216077453 U CN 216077453U CN 202121923419 U CN202121923419 U CN 202121923419U CN 216077453 U CN216077453 U CN 216077453U
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- plunger
- cylinder body
- main shaft
- flow guide
- end cover
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Abstract
The utility model relates to the technical field of machinery. The double-bearing high-pressure plunger pump is characterized in that the shell comprises a cylinder body with an upper opening and a lower end cover, and the upper end and the lower end of the cylinder body are detachably connected with the upper end cover and the lower end cover respectively; the swash plate is rotationally connected with the main shaft through a first bearing; the main shaft is detachably connected with the plunger cylinder body; the bottom of the plunger cylinder body can be detachably connected with a driven shaft; the lower end cover is provided with an inner concave part, and the inner concave part is rotatably connected with the driven shaft through a second bearing. This patent is through the mode of traditional single bearing, changes into the duplex bearing, great improvement the main shaft drive plunger cylinder body stationarity when rotating.
Description
Technical Field
The utility model relates to the technical field of machinery, in particular to a high-pressure plunger pump.
Background
The plunger pump is a component for converting mechanical energy into hydraulic energy, realizes oil suction and oil pressing actions through reciprocating motion of a plunger in a cylinder body, is one of the most widely used hydraulic elements in modern hydraulic transmission, and is also one of core power elements in a hydraulic system. The method is widely applied to the fields of coal, mines, metallurgy, railways, machine tools, pressure testing machinery and the like.
CN206397668U discloses a swash plate drive formula fluid is from lubricated high-pressure plunger pump, and the defect lies in, is equipped with the water lubricated bearing between the barrel inner wall of this high-pressure plunger pump and the plunger cylinder block outer wall, and the position that the bearing set up is single, is unfavorable for guaranteeing the stationarity of plunger cylinder block rotation in-process, and then has certain interference to the delivery accuracy of liquid.
SUMMERY OF THE UTILITY MODEL
The utility model provides a double-bearing high-pressure plunger pump for improving the rotation stability, aiming at solving at least one technical problem.
In order to achieve the purpose, the utility model provides a double-bearing high-pressure plunger pump for improving the rotation stability, which comprises a plunger pump body, wherein the plunger pump body comprises a shell, a main shaft, a plunger cylinder body, a plunger assembly and a swash plate, wherein the plunger assembly is arranged in a plunger hole of the plunger cylinder body in a sliding manner, and the swash plate is abutted against the plunger assembly;
the swash plate is rotationally connected with the main shaft through a first bearing;
the main shaft is detachably connected with the plunger cylinder body;
the bottom of the plunger cylinder body can be detachably connected with a driven shaft;
and the lower end cover is provided with an inner concave part, and the inner concave part is rotationally connected with the driven shaft through a second bearing.
This patent is through the mode of traditional single bearing, changes into the duplex bearing, great improvement the main shaft drive plunger cylinder body stationarity when rotating.
Further preferably, the first bearing and the second bearing are sliding bearings. Under liquid lubrication conditions, friction loss and surface wear can be greatly reduced.
Further preferably, the plunger assembly comprises a plunger and a sliding shoe, the top of the plunger is of a ball head structure, the ball head structure is rotatably connected with the sliding shoe,
the piston shoes are provided with through holes which penetrate through the piston shoes up and down, and the plungers are provided with through holes which penetrate through the piston shoes axially;
the inner wall of the main shaft is provided with a flow guide hole;
the flow guide hole is communicated with the inner concave part, and the flow guide hole is communicated with a gap between the swash plate and the spherical hinge.
The cooling of fluid realization to second bearing department of being convenient for will carrying guarantees the rotation stationarity.
Further preferably, the lower section of the swash plate is an inclined surface which inclines upwards from left to right;
the flow guide hole comprises a first flow guide part for transverse flow guide, and the right end opening of the first flow guide part is positioned below the right end of the swash plate adjacent to the main shaft side and is communicated with the lower part of the swash plate.
The fluid is guided into the first guide part under the guide of the inclined surface of the swash plate.
Preferably, a receiving groove is defined between the upper end cover and the swash plate, and the receiving groove is used for receiving a sealing element sleeved on the periphery of the main shaft;
the flow guide hole further comprises a second flow guide part for transverse flow guide, and the second flow guide part is communicated with the accommodating groove.
Facilitating the flow of fluid within the plunger cylinder.
Preferably, the plunger cylinder body is connected with the main shaft to form a limit groove for embedding the lower end part of the spherical hinge;
the plunger cylinder body is provided with at least three grooves which are circumferentially arranged and used for accommodating springs;
the spring is located in the groove, and the upper end of the spring is abutted to the lower end face of the spherical hinge.
The installation stationarity of ball pivot is further improved, and then the rotation stationarity of improvement plunger cylinder body.
Further preferably, the plunger cylinder body is longitudinally inserted into the main shaft and detachably connected with the main shaft through a screw;
the main shaft is longitudinally inserted into the driven shaft and detachably connected with the driven shaft through a screw.
Preferably, a spherical hinge is sleeved on the outer side of the main shaft and is tightly attached to the plunger cylinder body;
the spherical hinge is rotatably connected with a return disc, and the return disc is positioned between the plunger cylinder body and the swash plate;
the plunger assembly passes through the return disc.
Further preferably, the cylinder is cylindrical with an upper opening and a lower opening;
the upper end cover and the lower end cover are both provided with outer convex parts embedded into the cylinder body, and sealing rings are arranged between the outer convex parts and the cylinder body.
Drawings
FIG. 1 is a sectional view of embodiment 1 of the present invention;
FIG. 2 is an enlarged view of a portion of the utility model at III in FIG. 1.
Wherein: the device comprises a lower end cover 1, a valve plate 2, a floating disc component 3, a disc 3.1, an insert sleeve 3.2, a retainer ring 3.3, a sealing ring 3.4, a plunger cylinder 4.1, a main shaft 4.2, a driven shaft 4.3, a screw 4.4, a ball hinge 5, a return disc 6, a plunger component 7, a plunger 7.1, a sliding shoe 7.2, a cylinder 8, a swash plate 9, an upper end cover 10, a positioning ring 11, a sealing element 12, a flat key 13, a second O-shaped sealing ring 14, a first O-shaped sealing ring 15, a top sealing ring 16, a plug 18, a spring 19, a positioning pin 20, a first screw 21 and a second screw 23.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 2, embodiment 1: improve rotational stability's duplex bearing high pressure plunger pump, including the plunger pump body, the plunger pump body includes barrel 8, upper end cap 10, ball pivot, lower extreme cover 1, main shaft 4.2, plunger cylinder 4.1, valve plate 2, float dish subassembly 3, slide plunger subassembly 7 and the sloping cam plate 9 with the 7 butt of plunger subassembly of setting in the plunger hole of plunger cylinder. The top of the main shaft is provided with a flat key 15. The outer side of the main shaft 4.2 is sleeved with an upper end cover 10, a swash plate 9 and a plunger cylinder body which are sequentially sleeved from top to bottom. The spherical hinge 5 is tightly attached to the plunger cylinder body; the spherical hinge 5 is rotationally connected with a return disc 6, and the return disc 6 is positioned between the plunger cylinder body and a swash plate 9; the plunger assembly 7 passes through the return disc 6. The port plate 2 is detachably connected with the lower end cover 1 through a second screw 23. A first O-shaped sealing ring 15 is arranged between the valve plate 2 and the lower end cover 1. A second O-shaped sealing ring 14 is arranged between the upper end cover and the cylinder body 8. The lower end cover 1 and the cylinder 8 are oppositely positioned through a positioning pin 20, and the lower end cover 1 and the cylinder 8 are detachably connected through a first screw 21. The cylinder body is in a cylinder shape with an upper opening and a lower opening; the upper end cover and the lower end cover are both provided with outer convex parts embedded into the cylinder body, and a sealing ring is arranged between the outer convex parts and the cylinder body.
The swash plate 9 is rotationally connected with the main shaft through a first bearing; the main shaft is detachably connected with the plunger cylinder body; the bottom of the plunger cylinder body can be also detachably connected with a driven shaft 4.3; the lower end cover 1 is provided with an inner concave part, and the inner concave part is rotatably connected with the driven shaft through a second bearing. The plunger cylinder body is longitudinally inserted into the main shaft and detachably connected with the main shaft through a screw; the main shaft is longitudinally inserted into the driven shaft and is detachably connected with the driven shaft through a screw 4.4. The plunger cylinder 4.1, the main shaft 4.2, the driven shaft 4.3 and the screw 4.4 form a pump core assembly. This patent is through the mode of traditional single bearing, changes into the duplex bearing, great improvement the main shaft drive plunger cylinder body stationarity when rotating.
The first bearing and the second bearing are sliding bearings. Under liquid lubrication conditions, friction loss and surface wear can be greatly reduced.
The plunger assembly 7 comprises a plunger 7.1 and a sliding shoe 7.2, the top of the plunger 7.1 is of a ball head structure, the ball head structure is rotatably connected with the sliding shoe, the sliding shoe 7.2 is provided with a through hole which penetrates up and down, and the plunger is provided with a through hole which penetrates axially; the inner wall of the main shaft is provided with a flow guide hole; the diversion holes are communicated with the inner concave part and communicated with the clearance between the swash plate 9 and the spherical hinge 5. The conveying fluid is convenient to cool and lubricate the second bearing.
The lower section of the swash plate 9 is an inclined surface which inclines upwards from left to right; the flow guide hole comprises a first flow guide part for transverse flow guide, and a right end opening of the first flow guide part is positioned below the right end of the swash plate 9 adjacent to the main shaft side and communicated with the main shaft side. The fluid is guided into the first guide part under the guide of the inclined surface of the swash plate 9. The flow guide hole further comprises a second flow guide part for transverse flow guide, and the second flow guide part is communicated with the accommodating groove. The flow of the fluid in the plunger cylinder is convenient to realize. The guide hole further comprises a third guide part for transverse guide, a groove is formed in the periphery of the side, where the main shaft is provided with the spherical hinge, and the third guide part is communicated with the groove. And cooling and lubricating the spherical hinge.
An exhaust channel is arranged on the upper end cover 10; the exhaust channel is communicated with the diversion hole; an annular groove used for embedding the first bearing is formed in the upper end of the swash plate 9 and communicated with the exhaust channel. The cooling and lubrication at the first bearing is facilitated. The exhaust channel is communicated with the outer wall of the upper end cover, so that exhaust is facilitated. An accommodating groove is defined between the upper end cover 10 and the swash plate 9 and is used for accommodating a sealing element 12 sleeved on the periphery of the main shaft; the exhaust passage is communicated with the accommodating groove. The periphery of the annular groove is provided with a groove body, and the groove body is communicated with the accommodating groove. The arrangement of the upper end cover is detachably connected with a plug used for plugging the exhaust channel. A plug 18 is detachably connected to the outer wall of the housing.
The plunger cylinder body is connected with the main shaft to form a limit groove for embedding the lower end part of the spherical hinge 5; at least three grooves which are circumferentially arranged and used for accommodating the spring 19 are formed in the plunger cylinder body; the spring 19 is positioned in the groove, and the upper end of the spring 19 is abutted against the lower end face of the spherical hinge 5. Further improve the installation stationarity of ball pivot 5, and then improve the rotation stationarity of plunger cylinder body.
The floating disc component 3 comprises a disc 3.1, an insert sleeve 3.2, a retainer ring 3.3 and a sealing ring 3.4 which are arranged from top to bottom. The plunger hole of plunger cylinder body corresponds the setting from top to bottom with the round hole of disc 3.1, and installs in plunger hole and the round hole and inlay cover 3.2, inlays and is equipped with retaining ring 3.3 and sealing washer 3.4 between cover 3.2 and the plunger hole.
The upper end cover 1 comprises a cover plate with an upper opening and a lower opening and a positioning ring 11, and the cover plate and the positioning ring 11 enclose a groove embedded in a sealing element 12. A top sealing ring 16 is arranged between the cover plate and the positioning ring.
The valve plate comprises a PEEK layer and a metal plate which are arranged up and down, and the PEEK layer is formed above the metal plate in an injection molding mode; the metal disc is provided with two first arc-shaped through holes, the periphery of each first arc-shaped through hole is provided with an upwards extending closed boss, and the width of the section of each closed boss is gradually reduced from top to bottom; the PEEK layer is fixed on the periphery of the closed boss. This patent is through optimizing the structure of valve plate, has avoided traditional individual layer coating PEEK layer, the not good problem of intensity. This patent is through with PEEK layer injection moulding, and optimizes PEEK layer injection moulding region and be equipped with and seal the form boss, has improved the fixed strength on PEEK layer. The closed bosses on the periphery of the first arc-shaped through hole are connected through a connecting part.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (8)
1. The double-bearing high-pressure plunger pump capable of improving the rotation stability comprises a plunger pump body, wherein the plunger pump body comprises a shell, a main shaft, a plunger cylinder body, a plunger assembly and a swash plate, the plunger assembly is slidably arranged in a plunger hole of the plunger cylinder body, the swash plate is abutted to the plunger assembly, the shell comprises a cylinder body with an upper opening and a lower opening, an upper end cover and a lower end cover, and the upper end and the lower end of the cylinder body are detachably connected with the upper end cover and the lower end cover respectively;
the swash plate is rotationally connected with the main shaft through a first bearing;
the main shaft is detachably connected with the plunger cylinder body;
the bottom of the plunger cylinder body can be detachably connected with a driven shaft;
and the lower end cover is provided with an inner concave part, and the inner concave part is rotationally connected with the driven shaft through a second bearing.
2. The dual bearing high pressure plunger pump of claim 1, wherein: the first bearing and the second bearing are sliding bearings.
3. The dual bearing high pressure plunger pump of claim 1, wherein: the plunger assembly comprises a plunger and a sliding shoe, the top of the plunger is of a ball head structure, the ball head structure is rotatably connected with the sliding shoe,
the piston shoes are provided with through holes which penetrate through the piston shoes up and down, and the plungers are provided with through holes which penetrate through the piston shoes axially;
the inner wall of the main shaft is provided with a flow guide hole;
the flow guide hole is communicated with the inner concave part, and the flow guide hole is communicated with a gap between the swash plate and the spherical hinge.
4. The dual bearing high pressure plunger pump of claim 3, wherein: the lower section of the swash plate is an inclined surface which inclines upwards from left to right;
the flow guide hole comprises a first flow guide part for transverse flow guide, and the right end opening of the first flow guide part is positioned below the right end of the swash plate adjacent to the main shaft side and is communicated with the lower part of the swash plate.
5. The dual bearing high pressure plunger pump of claim 4, wherein: an accommodating groove is defined between the upper end cover and the swash plate and is used for accommodating a sealing element sleeved on the periphery of the main shaft;
the flow guide hole further comprises a second flow guide part for transverse flow guide, and the second flow guide part is communicated with the accommodating groove.
6. The dual bearing high pressure plunger pump of claim 1, wherein: the plunger cylinder body is connected with the main shaft to form a limiting groove for embedding the lower end part of the spherical hinge;
the plunger cylinder body is provided with at least three grooves which are circumferentially arranged and used for accommodating springs;
the spring is located in the groove, and the upper end of the spring is abutted to the lower end face of the spherical hinge.
7. The dual bearing high pressure plunger pump of claim 1, wherein: the plunger cylinder body is longitudinally inserted into the main shaft and detachably connected with the main shaft through a screw;
the main shaft is longitudinally inserted into the driven shaft and detachably connected with the driven shaft through a screw.
8. The dual bearing high pressure plunger pump of claim 1, wherein: the cylinder is cylindrical with an upper opening and a lower opening;
the upper end cover and the lower end cover are both provided with outer convex parts embedded into the cylinder body, and sealing rings are arranged between the outer convex parts and the cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121923419.6U CN216077453U (en) | 2021-08-17 | 2021-08-17 | Double-bearing high-pressure plunger pump capable of improving rotation stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121923419.6U CN216077453U (en) | 2021-08-17 | 2021-08-17 | Double-bearing high-pressure plunger pump capable of improving rotation stability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216077453U true CN216077453U (en) | 2022-03-18 |
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ID=80670148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121923419.6U Active CN216077453U (en) | 2021-08-17 | 2021-08-17 | Double-bearing high-pressure plunger pump capable of improving rotation stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216077453U (en) |
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2021
- 2021-08-17 CN CN202121923419.6U patent/CN216077453U/en active Active
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