CN220748512U - Plunger pump core for centralized lubricating oil pump - Google Patents
Plunger pump core for centralized lubricating oil pump Download PDFInfo
- Publication number
- CN220748512U CN220748512U CN202322062343.8U CN202322062343U CN220748512U CN 220748512 U CN220748512 U CN 220748512U CN 202322062343 U CN202322062343 U CN 202322062343U CN 220748512 U CN220748512 U CN 220748512U
- Authority
- CN
- China
- Prior art keywords
- piston rod
- pump
- valve core
- pump core
- limit nut
- 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.)
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Links
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 10
- 239000004519 grease Substances 0.000 claims abstract description 18
- 230000001050 lubricating effect Effects 0.000 claims abstract description 14
- 239000011258 core-shell material Substances 0.000 claims description 17
- 239000003921 oil Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005461 lubrication Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 5
- 239000006185 dispersion Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- Details Of Reciprocating Pumps (AREA)
Abstract
A plunger pump core for centralizing lubricating oil pump, including pump core casing, piston rod, case and stop nut, stop nut twists to establish in the hole of pump core casing, and the one end of piston rod stretches into the hole of pump core casing along the axial, and the case is located the hole of pump core casing and is located between stop nut and the piston rod, is equipped with the case spring between stop nut and the case, and the piston rod can be in keeping away from stop nut's retracted position and being close to stop nut's the position of stretching out between reciprocating motion, has seted up the inlet port on the lateral wall of pump core casing, has seted up axial through-hole on the stop nut. The utility model can ensure the positioning error of the valve core spring by only screwing the limit nut, has simple process and convenient operation, can conveniently adjust the installation length of the valve core spring, is convenient for reducing the dispersion of the pump core pressure, improves the consistency, reduces the failure rate and effectively and reliably realizes the pumping of the lubricating grease.
Description
Technical Field
The utility model relates to the field of centralized lubricating oil pumps, in particular to a plunger pump core for a centralized lubricating oil pump.
Background
The centralized lubrication system is widely applied to the fields of commercial vehicles, engineering machinery, wind power generation and the like, and the plunger pump is widely applied to the centralized lubrication pump due to the characteristics of high pumping pressure, accurate discharge capacity and the like. The centralized lubricating oil pump is generally composed of a motor, a controller, a transmission main shaft, an eccentric wheel, a pump core, an oil tank, a pump main body and the like, wherein the controller controls the motor to operate, and the eccentric wheel is driven by the transmission main shaft to drive a piston rod in the pump core to reciprocate, so that the conveying of lubricating grease is realized.
The existing plunger pump core commonly used is internally provided with a valve core, when a piston rod stretches, the pressure of lubricating grease can be increased, so that the valve core is pushed to move, the plunger pump core is opened and pumps grease outwards, when the piston rod retracts, the valve core is reset through the pushing of a spring, the lubricating grease flows into the plunger pump core, and the circulation of grease feeding and pumping is continuously realized through repeating the above processes. The existing plunger pump core is complex in structure, more in parts and poor in reliability, and the limiting mechanism matched with the valve core spring is a riveting limiting structure fixed inside the plunger pump core, so that the structure is complex, the installation is inconvenient, the installation length of the valve core spring is not easy to control under the condition that the riveting limiting structure is fixed, the pressure dispersion of the pump core is high, the consistency is poor, and the failure rate is high.
Disclosure of Invention
In order to solve the problems of the existing plunger pump cores, the utility model provides a plunger pump core for a centralized lubricating oil pump.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a plunger pump core for concentrated lubricating oil pump, including the pump core casing, the piston rod, case and stop nut, the pump core casing is cavity tubular structure, the hole of pump core casing is for being with stop nut assorted screw hole along axial one end, stop nut twists and establishes in the hole of pump core casing, the hole of pump core casing is along axial other end and piston rod assorted, the hole of pump core casing is stretched into along axial to the one end of piston rod, the case is arranged in the hole of pump core casing and is located between stop nut and the piston rod, be equipped with the case spring between stop nut and the case, the both ends of case spring are respectively the top and are established on the spacer ring at stop nut's terminal surface and case middle part, the elastic force through the case spring can promote the case and move towards the piston rod, and make the spacer ring at the case middle part press and establish on the spacing step at the hole middle part of being located the pump core casing, the piston rod can be in keeping away from the retracted position of stop nut and be close the reciprocating motion between the extension position of stop nut, the piston rod can seal the inner hole of pump core casing when the piston rod is located retracted position, the piston rod can seal the end of the piston core casing, and can flow through the oil feed hole and the piston rod between the piston rod and the piston rod axial direction between the case and the piston rod when the piston rod is located in the piston rod and the piston rod is stretched out of the piston rod, the axial position of the case and the case, the case can be moved to the piston rod and the piston rod to the piston rod.
Preferably, a piston rod spring is sleeved on the outer side of the piston rod, and the piston rod can be pushed to return to the retracted position from the extended position by the elastic force of the piston rod spring.
Preferably, the outer side of the valve core is provided with a sealing gasket, and the sealing gasket and the valve core are of an integrated structure.
According to the technical scheme, the utility model has the beneficial effects that:
the plunger pump core has a simple and reasonable structure, the limiting device at the upper part of the valve core spring is improved from a riveting limiting structure to the limiting nut, the distance between the end part of the limiting nut and the upper end of the pump core shell can be controlled by only screwing the limiting nut, the positioning error of the valve core spring can be ensured, the mode of fixing the limiting nut is adopted, the process is simple, the operation is convenient, the valve core spring can push the valve core to reset in time when the piston rod exits, the plunger pump core can be switched between the grease feeding state and the grease pumping state in time, the installation length of the valve core spring can be conveniently adjusted, the dispersion of the pressure of the pump core is conveniently reduced, the consistency is improved, the failure rate is reduced, and the pumping of lubricating grease is efficiently and reliably realized.
Drawings
FIG. 1 is a schematic illustration of a plunger pump cartridge;
fig. 2 is a cross-sectional view of a plunger pump cartridge.
The marks in the figure: 1. pump core casing 2, stop nut, 3, case, 4, piston rod, 5, case spring, 6, inlet port, 7, piston rod spring.
Detailed Description
Referring to the drawings, the specific embodiments are as follows:
a plunger pump core for centralizing lubricating oil pump, includes pump core casing 1, piston rod 4, case 3 and stop nut 2, and pump core casing 1 is cavity tubular structure, and the hole of pump core casing 1 along axial one end is the screw hole with stop nut 2 assorted, and stop nut 2 is twisted and is established in the hole of pump core casing 1, and the hole of pump core casing 1 along axial other end and piston rod 4 assorted.
One end of a piston rod 4 axially stretches into an inner hole of the pump core shell 1, a valve core 3 is positioned in the inner hole of the pump core shell 1 and between a limiting nut 2 and the piston rod 4, a valve core spring 5 is arranged between the limiting nut 2 and the valve core 3, two ends of the valve core spring 5 are respectively propped against the end face of the limiting nut 2 and a limiting ring in the middle of the valve core 3, the valve core 3 can be pushed to move towards the piston rod 4 by the elastic force of the valve core spring 5, and the limiting ring in the middle of the valve core 3 is pressed on a limiting step in the middle of the inner hole of the pump core shell 1. The outside of the valve core 3 is provided with a sealing gasket, and the sealing gasket and the valve core 3 are of an integrated structure.
The piston rod 4 can reciprocate between a retracted position far away from the limit nut 2 and an extended position close to the limit nut 2, an oil inlet hole 6 is formed in the side wall of the pump core housing 1, when the piston rod 4 is located at the retracted position, the piston rod 4 can close the end part of the inner hole of the pump core housing 1, lubricating grease can flow into the inner hole of the pump core housing 1 located between the piston rod 4 and the valve core 3 through the oil inlet hole 6, when the piston rod 4 moves from the retracted position to the extended position, the piston rod 4 can simultaneously close the end part of the inner hole of the pump core housing 1 and the oil inlet hole 6, the lubricating grease between the piston rod 4 and the valve core 3 pushes the valve core 3 to move towards the limit nut 2, so that the lubricating grease between the piston rod 4 and the valve core 3 flows to the limit nut 2, and an axial through hole is formed in the limit nut 2, so that the lubricating grease can pass through the limit nut 2 and be sent out from the pump core housing 1. The outside of the piston rod 4 is sleeved with a piston rod spring 7, and the piston rod 4 can be pushed to return to the retracted position from the extended position by the elastic force of the piston rod spring 7.
When the oil pump is installed, the distance between the end part of the limit nut and the upper end of the pump core shell can be controlled by tightening the limit nut, the positioning error of the valve core spring can be guaranteed, the mode of fixing the limit nut is adopted, the process is simple, the operation is convenient, the valve core spring can push the valve core to reset in time when the piston rod exits, the pump core of the plunger pump can be switched between the oil inlet state and the oil pumping state in time, the installation length of the valve core spring can be conveniently adjusted, the dispersion of the pressure of the pump core is conveniently reduced, the consistency is improved, the failure rate is reduced, and the pumping of lubricating grease is efficiently and reliably realized.
Claims (3)
1. A plunger pump core for a centralized lubricating oil pump, characterized in that: comprises a pump core shell (1), a piston rod (4), a valve core (3) and a limit nut (2), wherein the pump core shell (1) is of a hollow tubular structure, one end of the inner hole of the pump core shell (1) along the axial direction is a threaded hole matched with the limit nut (2), the limit nut (2) is screwed in the inner hole of the pump core shell (1), the other end of the inner hole of the pump core shell (1) along the axial direction is matched with the piston rod (4), one end of the piston rod (4) axially extends into the inner hole of the pump core shell (1), the valve core (3) is positioned in the inner hole of the pump core shell (1) and between the limit nut (2) and the piston rod (4), a valve core spring (5) is arranged between the limit nut (2) and the valve core (3), two ends of the valve core spring (5) are respectively propped against the end face of the limit nut (2) and the limit ring in the middle of the valve core (3), the limit ring in the middle of the valve core spring (5) can be pushed to move towards the piston rod (4) through the elastic force, the limit ring in the middle of the valve core (3) is pressed and is arranged in the inner hole of the middle of the pump core shell (1) along the axial direction, the inner hole of the inner hole (1) and the limit nut (4) can be far away from the limit nut (6) at the position of the piston rod (1) which is arranged between the limit nut (2), when the piston rod (4) is located at the retracted position, the piston rod (4) can seal the inner hole end part of the pump core shell (1), lubricating grease can flow into the inner hole of the pump core shell (1) located between the piston rod (4) and the valve core (3) through the oil inlet hole (6), when the piston rod (4) moves from the retracted position to the extended position, the piston rod (4) can simultaneously seal the inner hole end part of the pump core shell (1) and the oil inlet hole (6), the lubricating grease between the piston rod (4) and the valve core (3) pushes the valve core (3) to move towards the limit nut (2), so that the lubricating grease between the piston rod (4) and the valve core (3) flows to the limit nut (2), and an axial through hole is formed in the limit nut (2) so that the lubricating grease can pass through the limit nut (2) and is sent out from the inside of the pump core shell (1).
2. A plunger pump cartridge for a centralized lubrication pump as set forth in claim 1, wherein: the outside of the piston rod (4) is sleeved with a piston rod spring (7), and the piston rod (4) can be pushed to return to the retracted position from the extended position by the elastic force of the piston rod spring (7).
3. A plunger pump cartridge for a centralized lubrication pump as set forth in claim 1, wherein: the outer side of the valve core (3) is provided with a sealing gasket, and the sealing gasket and the valve core (3) are of an integrated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322062343.8U CN220748512U (en) | 2023-08-02 | 2023-08-02 | Plunger pump core for centralized lubricating oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322062343.8U CN220748512U (en) | 2023-08-02 | 2023-08-02 | Plunger pump core for centralized lubricating oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220748512U true CN220748512U (en) | 2024-04-09 |
Family
ID=90551210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322062343.8U Active CN220748512U (en) | 2023-08-02 | 2023-08-02 | Plunger pump core for centralized lubricating oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220748512U (en) |
-
2023
- 2023-08-02 CN CN202322062343.8U patent/CN220748512U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |