CN221299474U - Gear pump with lubricating oil path arranged outside - Google Patents
Gear pump with lubricating oil path arranged outside Download PDFInfo
- Publication number
- CN221299474U CN221299474U CN202323315126.1U CN202323315126U CN221299474U CN 221299474 U CN221299474 U CN 221299474U CN 202323315126 U CN202323315126 U CN 202323315126U CN 221299474 U CN221299474 U CN 221299474U
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- Prior art keywords
- oil
- cover plate
- gear shaft
- shaft
- pump body
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- 239000010687 lubricating oil Substances 0.000 title claims abstract description 7
- 239000003921 oil Substances 0.000 claims abstract description 75
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000005461 lubrication Methods 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000010720 hydraulic oil Substances 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- Rotary Pumps (AREA)
Abstract
The utility model discloses a gear pump with an external lubricating oil path, which comprises a pump body, a front cover plate, a rear cover plate, an O-shaped sealing ring, a cylindrical pin, a driving gear shaft, a driven gear shaft, an 8-shaped sleeve, a shaft sleeve, a lip-shaped sealing piece, an elastic retainer ring for holes, a front cover oil path and an oil drain hole. Compared with the prior art, the hydraulic oil involved in lubrication is discharged through the oil way and the oil discharge hole, so that the temperature rise caused by long-time friction of part of oil in the pump body is avoided, the oil temperature in the pump body is reduced, and the galloping condition is avoided.
Description
Technical Field
The utility model relates to the technical field of gear pumps, in particular to a gear pump with an externally discharged lubricating oil path.
Background
Gear pumps are rotary pumps that rely on the change and movement of working volume created between the pump cavity and the meshing gears to deliver or pressurize a liquid. When the gears rotate, the volume of the space at the disengaging side of the gears is changed from small to large to form vacuum, liquid is sucked in, the volume of the space at the engaging side of the gears is changed from large to small, and the liquid is extruded into the pipeline; the suction chamber is separated from the discharge chamber by the meshing line of the two gears, the pressure at the discharge outlet of the gear pump being entirely dependent on the amount of resistance at the pump outlet. When the existing gear pump rotates at a low speed, oil in the pump body can repeatedly participate in lubrication of a bearing and shaft section sealing, the temperature of the oil rises after long-time use, the viscosity is reduced, and the condition that the rotation speed of the pump body continuously rises but does not work occurs under the condition that pressure maintaining is needed.
Disclosure of utility model
The utility model aims to provide a gear pump with an external lubricating oil path, which solves the problems in the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the device comprises a pump body, a front cover plate, a rear cover plate, an O-shaped sealing ring, a cylindrical pin, a driving gear shaft, a driven gear shaft, an 8-shaped sleeve, a shaft sleeve, a lip-shaped sealing piece, an elastic retainer ring for holes, an oil discharge path and an oil discharge hole; front cover plates and rear cover plates are arranged on the front side and the rear side of the pump body, inlet and outlet openings are formed on the left side and the right side of the pump body, the front cover plates are assembled and fixed by cylindrical pins, and the rear cover plates are assembled and fixed by screws; an O-shaped sealing ring is additionally arranged at the inner side edge of the joint of the front cover plate and the rear cover plate and the pump body; the 8-shaped sleeves are arranged on the front side and the rear side of the interior of the pump body; the driving gear shaft is arranged on the upper side in the pump body, the front shaft section of the driving gear shaft passes through the 8-shaped sleeve and the front cover plate after being assembled with the shaft sleeve, and the rear shaft section is assembled with the shaft sleeve and is arranged in the 8-shaped sleeve; the driven gear shaft is arranged at the lower side of the pump body, shaft sleeves are respectively assembled at the front side and the rear side of the driven gear shaft and are arranged in the 8-shaped sleeve, a round hole penetrating through the whole shaft section is formed in the center of the driven gear shaft, and the gear section is meshed with the gear section of the driving gear shaft; the lip seal and the elastic retainer ring for holes are arranged on the front shaft section of the driving gear shaft and positioned in the front cover plate; the oil discharge oil ways are respectively arranged on the front cover plate and the rear cover plate and are communicated with the end surfaces of the driving gear shaft and the driven gear shaft; the oil drain hole is positioned on the rear side surface of the rear cover plate and communicated with an oil drain way.
As a preferable technical scheme of the utility model, the oil discharge way respectively connects two hole sites in the front cover plate and the rear cover plate.
As a preferable technical scheme of the utility model, the oil drain hole is concentric with the driven gear shaft mounting hole in the rear cover plate.
As a preferable technical scheme of the utility model, the left side and the right side of the front side of the 8-shaped sleeve are respectively provided with an oil hole, an oil way is arranged in the oil holes, the two oil holes are communicated, and an oil way outlet is positioned on the right side of the 8-shaped sleeve.
As a preferable technical scheme of the utility model, the 8-shaped sleeve is symmetrically arranged along the pump body.
Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the hydraulic oil involved in lubrication is discharged through the oil way and the oil discharge hole, so that the temperature rise caused by long-time friction of partial oil in the pump body is avoided, the oil temperature in the pump body is reduced, and the occurrence of the galloping condition is avoided.
Drawings
FIG. 1 is a cross-sectional view of the present utility model;
FIG. 2 is a front view of the front cover of the present utility model;
FIG. 3 is a front view of the back cover of the present utility model;
FIG. 4 is a right side view of the driven gear shaft of the present utility model;
In the figure: pump body 1, front cover plate 2, rear cover plate 3, O-shaped sealing ring 4, cylindrical pin 5, driving gear shaft 6, driven gear shaft 7, 8-shaped sleeve 8, shaft sleeve 9, lip seal 10, elastic retainer ring 11 for hole, oil drain way 12 and oil drain hole 13
Detailed Description
Example 1
As shown in fig. 1 to 3, the utility model discloses a gear pump with an external lubricating oil path, which comprises a pump body 1, a front cover plate 2, a rear cover plate 3, an O-shaped sealing ring 4, a cylindrical pin 5, a driving gear shaft 6, a driven gear shaft 7, an 8-shaped sleeve 8, a shaft sleeve 9, a lip seal 10, an elastic retainer ring 11 for holes, an oil discharge path 12 and an oil discharge hole 13; front cover plates 2 and rear cover plates 3 are arranged on the front side and the rear side of the pump body 1, inlet and outlet openings are formed on the left side and the right side of the pump body, the front cover plates 2 are assembled and fixed by cylindrical pins 5, and the rear cover plates 3 are assembled and fixed by screws; an O-shaped sealing ring 4 is additionally arranged at the inner side edge of the joint of the front cover plate 2 and the rear cover plate 3 and the pump body 1; the 8-shaped sleeves 8 are arranged on the front side and the rear side of the interior of the pump body 1; the driving gear shaft 6 is arranged on the upper side in the pump body 1, the front shaft section of the driving gear shaft passes through the 8-shaped sleeve 8 and the front cover plate 2 after being provided with the shaft sleeve 9, and the rear shaft section is provided with the shaft sleeve 9 which is arranged in the 8-shaped sleeve 8; the driven gear shaft 7 is arranged at the lower side of the inside of the pump body 1, shaft sleeves 9 are assembled at the front side and the rear side of the driven gear shaft, the driven gear shaft is arranged in an 8-shaped sleeve 8, a round hole penetrating through the whole shaft section is formed in the center of the driven gear shaft, and the gear section is meshed with the gear section of the driving gear shaft 6; the lip seal 10 and the circlip 11 for holes are arranged on the front shaft section of the driving gear shaft 6 and positioned in the front cover plate 2; the oil drain way 12 is respectively arranged on the front cover plate 2 and the rear cover plate 3 and is communicated with the end surfaces of the driving gear shaft 6 and the driven gear shaft 7; the oil drain hole 13 is positioned at the rear side surface of the rear cover plate 3 and is communicated with the oil drain way 12. The oil discharge oil ways (12) respectively enable two hole sites in the front cover plate (2) and the rear cover plate (3) to be connected, and the driven gear shaft (7) penetrates through the round hole of the whole shaft section to be connected with the oil discharge oil ways 12 on the left side and the right side, and the oil discharge oil ways and the oil discharge holes (13) form the whole oil discharge oil way together.
The working principle of the utility model is as follows: the direction described in the present working principle is as viewed in the axial direction from the long axis side of the drive gear shaft 6 with the pump body 1 as the center. When the gear pump is started, external power drives the driving gear shaft 6 to rotate, the driven gear shaft 7 is meshed with the gear section of the driving gear shaft 6 to rotate, the clockwise rotation of the driving gear shaft 6 is recorded as positive rotation, the left side in the pump body 1 is used for absorbing oil in a low-pressure area, and the right side is used for forming oil in a high-pressure area; at the moment, sealing rings in the inner groove and the outer groove seal high-pressure oil and divide the interior of the pump body 1 into four areas, wherein medium-pressure oil is arranged on the upper side and the lower side; the oil entering the front side of the driving gear shaft 6 enters an oil discharging oil way 12 of the front cover plate 2 through an oil way and an oil hole on the '8' -shaped sleeve 8, flows to the driven gear shaft 7, is discharged to an oil discharging oil way 12 on the rear cover plate 3 through an oil way in the driven gear shaft 7, and is discharged from an oil discharging hole 13; the oil entering the rear side of the driving gear shaft 6 directly flows from the oil discharging path 12 on the rear cover plate 3 to the oil discharging hole 13 for discharging. The lack of oil in the pump body 1 can be supplemented through an inlet.
According to the utility model, the hydraulic oil involved in lubrication is discharged through the oil way and the oil discharge hole, so that the temperature rise caused by long-time friction of partial oil in the pump body is avoided, the oil temperature in the pump body is reduced, and the occurrence of the galloping condition is avoided.
Although the specific embodiments of the present utility model have been described in detail, the present utility model is not limited to the above embodiments, and various changes and modifications without inventive labor may be made within the scope of the present utility model without departing from the spirit of the present utility model, which is within the scope of the present utility model.
Claims (5)
1. The utility model provides a gear pump of lubricating oil way row which characterized in that: the device comprises a pump body (1), a front cover plate (2), a rear cover plate (3), an O-shaped sealing ring (4), a cylindrical pin (5), a driving gear shaft (6), a driven gear shaft (7), an 8-shaped sleeve (8), a shaft sleeve (9), a lip-shaped sealing piece (10), a circlip (11) for holes, an oil discharge path (12) and an oil discharge hole (13); front cover plates (2) and rear cover plates (3) are arranged on the front side and the rear side of the pump body (1), inlet and outlet openings are formed in the left side and the right side of the pump body, the front cover plates (2) are assembled and fixed by cylindrical pins (5), and the rear cover plates (3) are assembled and fixed by screws; an O-shaped sealing ring (4) is additionally arranged at the inner side edge of the joint of the front cover plate (2) and the rear cover plate (3) and the pump body (1); the 8-shaped sleeves (8) are arranged on the front side and the rear side of the interior of the pump body (1); the driving gear shaft (6) is arranged on the upper side in the pump body (1), the front shaft section of the driving gear shaft passes through the 8-shaped sleeve (8) and the front cover plate (2) after being provided with the shaft sleeve (9), and the rear shaft section is provided with the shaft sleeve (9) which is arranged in the 8-shaped sleeve (8); the driven gear shaft (7) is arranged at the lower side of the inside of the pump body (1), shaft sleeves (9) are assembled at the front side and the rear side of the driven gear shaft, the driven gear shaft is arranged in an 8-shaped sleeve (8), a round hole penetrating through the whole shaft section is formed in the center of the driven gear shaft, and the gear section is meshed with the gear section of the driving gear shaft (6); the lip seal (10) and the hole circlip (11) are arranged on the front shaft section of the driving gear shaft (6) and positioned in the front cover plate (2); the oil discharge oil way (12) is respectively arranged on the front cover plate (2) and the rear cover plate (3) and is communicated with the end surfaces of the driving gear shaft (6) and the driven gear shaft (7); the oil drain hole (13) is positioned on the rear side surface of the rear cover plate (3) and is communicated with the oil drain way (12).
2. A lubrication outlet gear pump according to claim 1, wherein: the oil discharge oil way (12) respectively connects two hole sites in the front cover plate (2) and the rear cover plate (3).
3. A lubrication outlet gear pump according to claim 1, wherein: the oil drain hole (13) is concentric with the mounting hole of the driven gear shaft (7) in the rear cover plate (3).
4. A lubrication outlet gear pump according to claim 1, wherein: the said
The left side and the right side of the front side of the 8-shaped sleeve (8) are respectively provided with an oil hole, the inside of the sleeve is provided with an oil way, the two oil holes are communicated, and an oil way outlet is positioned on the right side of the 8-shaped sleeve (8).
5. A lubrication outlet gear pump according to claim 4, wherein: the said
The 8-shaped sleeve (8) is symmetrically arranged along the pump body (1) left and right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323315126.1U CN221299474U (en) | 2023-12-06 | 2023-12-06 | Gear pump with lubricating oil path arranged outside |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323315126.1U CN221299474U (en) | 2023-12-06 | 2023-12-06 | Gear pump with lubricating oil path arranged outside |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221299474U true CN221299474U (en) | 2024-07-09 |
Family
ID=91751041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323315126.1U Active CN221299474U (en) | 2023-12-06 | 2023-12-06 | Gear pump with lubricating oil path arranged outside |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221299474U (en) |
-
2023
- 2023-12-06 CN CN202323315126.1U patent/CN221299474U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |