CN216642444U - Sliding bearing oil groove structure of internal gear pump - Google Patents
Sliding bearing oil groove structure of internal gear pump Download PDFInfo
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- CN216642444U CN216642444U CN202123004265.3U CN202123004265U CN216642444U CN 216642444 U CN216642444 U CN 216642444U CN 202123004265 U CN202123004265 U CN 202123004265U CN 216642444 U CN216642444 U CN 216642444U
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- sliding bearing
- gear pump
- oil groove
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Abstract
The utility model discloses a sliding bearing oil groove structure of an internal gear pump, which comprises the internal gear pump, wherein the internal gear pump consists of a front cover, a middle pump body and a rear cover, the front cover, the middle pump body and the rear cover are connected through screws to form a three-piece structure, a pair of external gear shafts and an internal gear which are mutually meshed are arranged inside the internal gear pump, a thrust shaft, a sealing rod, a leaf spring, a crescent auxiliary plate and a crescent main plate are arranged between the internal gear and the external gear, two end surfaces of the internal gear and the external gear are provided with a special-shaped sealing ring, a special-shaped check ring and an oil distribution disc, and sliding bearings are further arranged on the internal walls of the external gear shaft, the front cover and the rear cover of the internal gear pump.
Description
Technical Field
The utility model belongs to the field of lubrication of shafts and sliding bearings, and particularly relates to an oil groove structure of a sliding bearing of an internal gear pump.
Background
The internal gear pump has the advantages of high volumetric efficiency, high pressure level and low noise, is widely applied to an alternating-current servo hydraulic system, is matched with a servo motor for use, and has a good energy-saving effect. The oil grooves of the sliding bearing of the existing crescent gear pump are straight grooves, as shown in figure 3, the structure is unreasonable, the lubricating state and the cooling effect are poor, the service life of the crescent gear pump is influenced, and improvement is needed.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes the defects of the prior art, and provides an oil groove structure of a sliding bearing of an internal gear pump, so as to solve the problem that the lubricating and cooling effects of the existing product are not ideal in the prior art.
In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides an internal gear pump slide bearing oil groove structure, includes internal gear pump, internal gear pump comprises protecgulum, the well pump body and back lid, and protecgulum, the well pump body and back lid pass through the screw connection and constitute three-piece formula structure, inside a pair of intermeshing's outer gear shaft and the internal gear of being equipped with of internal gear pump is equipped with thrust shaft, sealing rod, leaf spring, crescent subplate and crescent mainboard between the internal and external gear, and the both ends face of internal and external gear is equipped with special-shaped sealing washer, special-shaped retaining ring and joins in marriage the food tray, the outer gear shaft still is equipped with slide bearing with the inner wall of internal gear pump protecgulum, back lid.
In a preferred embodiment of the utility model, a right-handed lubricating oil groove with a lead angle α is formed on the non-bearing surface of the inner wall of the front cover sliding bearing, and a left-handed lubricating oil groove with a lead angle α is formed on the non-bearing surface of the inner wall of the rear cover sliding bearing.
In a preferred embodiment of the present invention, the thrust shaft, the sealing rod, the plate spring, the crescent auxiliary plate and the crescent main plate form a radial compensation assembly.
In a preferred embodiment of the utility model, the special-shaped sealing ring, the special-shaped retainer ring and the oil distribution disc form an axial compensation assembly.
In a preferred embodiment of the utility model, an oil seal is arranged at the joint of the outer gear shaft and the front cover, and O-shaped rings are arranged at the joint of the middle pump body and the front cover as well as the joint of the middle pump body and the rear cover.
In a preferred embodiment of the utility model, the outer end of the spiral oil groove on the inner wall of the sliding bearing is communicated with the oil suction cavity through the inner cavities of the front cover and the rear cover and the inclined hole, and the inner end of the spiral oil groove on the inner wall of the sliding bearing is communicated with the root part of the disengaged gear teeth at the right lower part of the external gear shaft.
The utility model solves the defects in the background technology, and has the following beneficial effects:
the oil entering the oil groove of the sliding bearing has high viscosity, good forming condition of the oil film and strong bearing capacity of the oil film; the heat of the sliding bearing can be taken away circularly and continuously, and the sliding bearing has good lubricating and cooling effects; the oil absorption performance of the pump is improved, the suction phenomenon is avoided, the volume efficiency can be improved, the cavitation erosion and noise reduction effect is obvious, the spiral oil groove structure of the sliding bearing is more reasonable than that of a straight groove, the lubricating and cooling effects are good, and the oil absorption performance of the internal gear pump can be improved.
Drawings
The utility model is further explained below with reference to the figures and examples;
FIG. 1 is a view of the internal structure of a crescent gear pump in accordance with a preferred embodiment of the present invention;
FIG. 2 is a side sectional view of a crescent gear pump in accordance with a preferred embodiment of the present invention;
FIG. 3 is a view of a sliding bearing oil groove configuration prior to modification of the preferred embodiment of the present invention;
FIG. 4 is a view of the oil groove structure of the sliding bearing of the front cover according to the preferred embodiment of the present invention;
fig. 5 is a structure view of a sliding bearing oil groove of the rear cover according to the preferred embodiment of the present invention.
In the figure: 1. an outer gear shaft; 2. a front cover; 3. oil sealing; 4. a sliding bearing; 5. an O-shaped ring; 6. a special-shaped sealing ring; 7. a special-shaped retainer ring; 8. an oil distribution disc; 9. an internal gear; 10. a middle pump body; 11. a screw; 12. a rear cover; 13. a thrust shaft; 14. a sealing bar; 15. a leaf spring; 16. a crescent auxiliary plate; 17. crescent mainboard.
Detailed Description
The utility model will now be described in further detail with reference to the accompanying drawings and examples, which are simplified schematic drawings and illustrate only the basic structure of the utility model in a schematic manner, and thus show only the constituents relevant to the utility model.
Example (b):
as shown in fig. 1 and fig. 2, a sliding bearing oil groove structure of an internal gear pump comprises an internal gear pump, the internal gear pump is composed of a front cover 2, a middle pump body 10 and a rear cover 12, the front cover 2, the middle pump body 10 and the rear cover 12 are connected by a screw 11 to form a three-piece structure, a pair of external gear shaft 1 and an internal gear 9 which are meshed with each other are arranged inside the internal gear pump, a thrust shaft 13, a sealing rod 14, a leaf spring 15, a crescent auxiliary plate 16 and a crescent main plate 17 are arranged between the internal gear and the external gear, a special-shaped sealing ring 6, a special-shaped check ring 7 and an oil distribution disc 8 are arranged on two end faces of the internal gear, a sliding bearing 4 is further arranged on the internal walls of the external gear shaft 1, the front cover and the rear cover of the internal gear pump, when the external gear shaft 1 rotates clockwise in the drawing, the right lower gear is disengaged, the volume between the teeth is gradually increased to form negative pressure, and under the action of atmospheric pressure, enter the oil suction cavity to fill all the teeth (i.e. suck oil), and at the place where the right upper teeth enter the meshing, the volume between the teeth is gradually reduced, and the excessive oil is squeezed out (i.e. press oil).
As shown in fig. 3 and 4, a right-handed lubrication groove with a lead angle α is formed on the non-bearing surface of the inner wall of the front cover sliding bearing, and a left-handed lubrication groove with a lead angle α is formed on the non-bearing surface of the inner wall of the rear cover sliding bearing, that is, the spiral direction of the spiral oil groove is the same as the axial direction.
As shown in fig. 1 and 2, the thrust shaft 13, the seal rod 14, the flat spring 15, the crescent auxiliary plate 16 and the crescent main plate 17 constitute a radial compensation assembly.
As shown in fig. 1 and 2, the special-shaped sealing ring 6, the special-shaped retainer ring 7 and the oil distribution disc 8 form an axial compensation assembly.
As shown in fig. 1 and 2, an oil seal 3 is arranged at the joint of the outer gear shaft 1 and the front cover 2, an O-ring 5 is arranged at the joint of the middle pump body 10 and the front cover and the rear cover 12, and the oil seal 3 and the O-ring 5 play a sealing role.
As shown in fig. 1-5, the outer ends of the spiral oil grooves on the inner walls of the sliding bearings 4 are communicated with the oil suction cavity through the inner cavities and the inclined holes of the front cover 2 and the rear cover 12, the inner ends of the spiral oil grooves on the inner walls of the sliding bearings 4 are communicated with the root parts of the meshing gear teeth which are separated from the right lower part of the outer gear shaft 1, along with the rotation of the outer gear shaft 1, a great amount of oil flows in the oil grooves of the two sliding bearings 4, all the oil entering the oil grooves of the sliding bearings 4 is cold oil in the oil suction cavity, the oil viscosity is high, the formation condition of an oil film is good, and the bearing capacity of the oil film is strong; the heat of the sliding bearing 4 can be taken away circularly and continuously, and good lubricating and cooling effects are achieved on the sliding bearing 4; because the oil is filled in the root part of the gear tooth which is just disengaged, the oil absorption performance of the pump is improved, the phenomenon of air suction is avoided, the volume efficiency can be improved, and the effect of reducing cavitation and noise is remarkable.
In light of the foregoing description of the preferred embodiments of the present invention, it is to be understood that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. The utility model provides an internal gear pump slide bearing oil groove structure, includes internal gear pump, its characterized in that, internal gear pump comprises protecgulum, well pump body and back lid, and protecgulum, well pump body and back lid pass through the screw connection and constitute three formula structures, internal gear pump is inside to be equipped with a pair of intermeshing's external gear axle and internal gear, is equipped with thrust shaft, sealing rod, leaf spring, crescent subplate and crescent mainboard between the internal gear and the external gear, and the both ends face of internal gear and external gear is equipped with special-shaped sealing washer, special-shaped retaining ring and joins in marriage the food tray, the internal wall of external gear axle and internal gear pump protecgulum, back lid still is equipped with slide bearing.
2. An internal gear pump sliding bearing oil groove structure as claimed in claim 1, wherein the non-bearing surface of the inner wall of the front cover sliding bearing is provided with a right-handed lubrication groove with a lead angle α, and the non-bearing surface of the inner wall of the rear cover sliding bearing is provided with a left-handed lubrication groove with a lead angle α.
3. An internal gear pump sliding bearing oil groove structure according to claim 1, wherein the thrust shaft, the sealing rod, the leaf spring, the crescent auxiliary plate and the crescent main plate form a radial compensation component.
4. An internal gear pump sliding bearing oil groove structure according to claim 1, wherein the profiled sealing ring, the profiled retainer ring and the oil distribution disc constitute an axial compensation assembly.
5. An internal gear pump sliding bearing oil groove structure as claimed in claim 1, wherein the joint of the outer gear shaft and the front cover is provided with an oil seal, and the joint of the middle pump body and the front cover and the rear cover is provided with an O-shaped ring.
6. An internal gear pump sliding bearing oil groove structure as claimed in claim 1, wherein the outer end of the sliding bearing inner wall spiral oil groove is communicated with the oil suction cavity through the inner cavities of the front cover and the rear cover and the inclined hole, and the inner end of the sliding bearing inner wall spiral oil groove is communicated with the root of the meshing gear teeth which are separated from the right lower part of the external gear shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123004265.3U CN216642444U (en) | 2021-12-01 | 2021-12-01 | Sliding bearing oil groove structure of internal gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123004265.3U CN216642444U (en) | 2021-12-01 | 2021-12-01 | Sliding bearing oil groove structure of internal gear pump |
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| Publication Number | Publication Date |
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| CN216642444U true CN216642444U (en) | 2022-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123004265.3U Active CN216642444U (en) | 2021-12-01 | 2021-12-01 | Sliding bearing oil groove structure of internal gear pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114087173A (en) * | 2021-12-01 | 2022-02-25 | 苏州铼洛威液压泵有限公司 | Sliding bearing oil groove structure of internal gear pump |
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2021
- 2021-12-01 CN CN202123004265.3U patent/CN216642444U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114087173A (en) * | 2021-12-01 | 2022-02-25 | 苏州铼洛威液压泵有限公司 | Sliding bearing oil groove structure of internal gear pump |
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