CN218493809U - Oil blocking seat and oil seal assembly of screw compressor - Google Patents
Oil blocking seat and oil seal assembly of screw compressor Download PDFInfo
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- CN218493809U CN218493809U CN202222436394.8U CN202222436394U CN218493809U CN 218493809 U CN218493809 U CN 218493809U CN 202222436394 U CN202222436394 U CN 202222436394U CN 218493809 U CN218493809 U CN 218493809U
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Abstract
The utility model relates to an oil baffle seat and an oil seal component of a screw compressor, wherein the oil baffle seat is of an annular structure, and the inner side wall of the oil baffle seat is provided with at least one circle of seal groove; the side wall of the oil retaining seat is provided with at least one radial oil return hole, and the radial oil return hole is communicated with at least one sealing groove; and at least one axial oil return hole is formed in one end face of the oil blocking seat and communicated with at least one sealing groove. The oil blocking seat of the utility model can be matched with the oil seal ring arranged on the rotor shaft, so that the seal groove can seal lubricating oil, the lubricating oil is prevented from continuously flowing to the screw rotor in the compression cavity along the rotor shaft, and part of the lubricating oil sealed in the seal groove can flow out of the oil blocking seat along the radial oil return hole and then can flow back to the oil tank for recycling; the other part of the lubricating oil sealed in the sealing groove can flow back to the bearing end along the axial oil return hole to lubricate the bearing.
Description
Technical Field
The utility model relates to an oil-free screw compressor's technical field, more exactly relate to a keep off oil seat and screw compressor's oil blanket subassembly.
Background
The compression chamber of the oil-free screw compressor must be ensured to be oilless, but the gear for the transmission of the rotor shaft in the gear box and the bearing on the rotor shaft need lubricating oil to lubricate and cool, and in order to ensure that the lubricating oil for lubricating the bearing on the rotor shaft cannot leak into the compression chamber, a sealing element must be arranged on the rotor shaft extending out of the front and the back of the compression chamber to seal, so that the lubricating oil is prevented from flowing onto the screw rotor in the compression chamber along the rotor shaft. In the prior art, the sealing element of the oil-free screw compressor only has the function of blocking lubricating oil from flowing to the screw rotor in the compression cavity along the rotor shaft, and does not have the function of making the lubricating oil flow back to the bearing end, and the oil-free screw compressor is not convenient to disassemble and assemble.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a keep off oil seat, can with install the epaxial oil blanket circle cooperation of rotor, can block lubricating oil along the rotor axial compressor to the screw rotor in the compression chamber on, can make lubricating oil backward to the bearing end again.
The technical solution of the utility model is to provide an oil baffle seat which is of an annular structure, and the inner side wall of the oil baffle seat is provided with at least one circle of sealing grooves; the side wall of the oil retaining seat is provided with at least one radial oil return hole, and the radial oil return hole is communicated with at least one sealing groove; and at least one axial oil return hole is formed in one end face of the oil blocking seat and communicated with at least one sealing groove.
Compared with the prior art, the utility model discloses a keep off oil seat has following advantage: the inner side wall of the oil blocking seat is provided with a sealing groove, and when lubricating oil flows into the sealing groove along the rotor axial flow, the sealing groove can seal the lubricating oil and prevent the lubricating oil from continuing flowing onto the screw rotor in the compression cavity along the rotor axial flow; the radial oil return hole on the side wall is communicated with the sealing groove, and the lubricating oil sealed in the sealing groove can flow out of the oil retaining seat along the radial oil return hole and further can flow back into the oil tank for recycling; the axial oil return hole on the end face is communicated with the sealing groove, and lubricating oil sealed in the sealing groove can flow back to the bearing end along the axial oil return hole to lubricate the bearing.
Preferably, the number of the axial oil return holes is at least two, and internal threads are arranged in the axial oil return holes. By adopting the structure, the internal threads are arranged in the axial oil return hole, when the oil blocking seat is installed or disassembled, the screw rod or the long screw can be connected with the axial oil return hole in a threaded manner, and then the screw rod or the long screw is pushed and pulled to complete the disassembly and assembly work of the oil blocking seat, so that the operation is convenient.
Preferably, a circle of outer side oil return groove is formed in the outer side wall of the oil blocking seat, and the radial oil return hole is communicated with the outer side oil return groove. By adopting the structure, the lubricating oil sealed in the sealing groove can flow into the outer oil return groove along the radial oil return hole and then slowly flows back into the oil tank from the outer oil return groove for recycling, and the outer oil return groove plays a role in temporarily storing the returned lubricating oil, so that the leakage caused by the untimely return of the lubricating oil is avoided.
Preferably, the end face of the oil retaining seat where the axial oil return hole is located is provided with a plurality of limiting convex blocks. By adopting the structure, the limiting convex block can be abutted outwards, so that the oil blocking seat is limited or positioned.
The to-be-solved technical problem of the utility model is to provide a screw compressor's oil blanket subassembly can block lubricating oil along the screw rotor of rotor axial flow to the compression intracavity, can make lubricating oil backward to the bearing end again.
The technical solution of the utility model is to provide an oil seal assembly of screw compressor, including the compressor housing, be provided with compression chamber, oil return district and bearing frame in the compressor housing, be provided with screw rotor in the compression chamber, the tip of screw rotor is provided with the rotor shaft that stretches out outside the compression chamber, is provided with labyrinth oil seal circle and bearing on the rotor shaft, labyrinth oil seal circle be located oil return district in, the bearing is located the bearing frame in, be provided with a plurality of circles of labyrinth grooves on the lateral wall of labyrinth oil seal circle; the oil return district in be provided with as above keep off the oil holder, the rotor shaft passes and keeps off the oil holder, seal groove and labyrinth oil seal clearance fit and with the labyrinth groove relative, axial oil gallery is relative with the bearing.
Compared with the prior art, the utility model discloses a helical-lobe compressor's oil blanket subassembly has following advantage: when the screw rotor rotates, the labyrinth oil seal ring and the bearing inner ring rotate along with the rotor shaft, the sealing groove keeps static in an oil return area of the compressor shell, the sealing groove of the oil blocking seat is in clearance fit with the labyrinth oil seal ring and is opposite to the labyrinth groove, the axial oil return hole is opposite to the bearing, lubricating oil sealed in the labyrinth groove can enter the sealing groove, one part of the lubricating oil flows out of the oil blocking seat along the radial oil return hole and can flow back into the oil tank for recycling, and the other part of the lubricating oil flows back to the bearing end along the axial oil return hole to lubricate the bearing.
Preferably, the end face of the oil retaining seat where the axial oil return hole is located is provided with a plurality of limiting lugs, and the limiting lugs are all abutted against and pressed against the bearing. By adopting the structure, the limiting lug is abutted and compressed with the outer ring of the bearing, so that the bearing and the oil blocking seat are both limited, and the axial movement of the bearing and the oil blocking seat is avoided.
Preferably, a shell oil return groove is formed in the oil return area and communicated with the radial oil return hole. By adopting the structure, the lubricating oil sealed in the sealing groove can flow into the shell oil return groove along the radial oil return hole and then slowly flows back into the oil tank through the shell oil return groove for recycling, and the shell oil return groove plays a role in temporarily storing the returned lubricating oil, so that the leakage caused by the untimely return of the lubricating oil is avoided.
Preferably, a circle of outer side oil return groove is formed in the outer side wall of the oil blocking seat, and the outer side oil return groove is opposite to and communicated with the shell oil return groove. By adopting the structure, the outer side oil return groove is opposite to and communicated with the shell oil return groove, the storage space of the returned lubricating oil is increased, and the risk of leakage caused by untimely return of the lubricating oil is greatly reduced.
Drawings
Fig. 1 is a schematic top view of the oil baffle seat of the present invention.
Fig. 2 is a schematic side view of the oil retainer of the present invention.
Fig. 3 is a cross-sectional view of fig. 2.
Fig. 4 is the structure schematic diagram of the labyrinth oil seal ring matched with the oil baffle seat of the utility model and the rotor shaft.
Fig. 5 is an enlarged schematic view of the area a in fig. 4.
As shown in the figure: 1. 1-1 parts of an oil blocking seat, 1-2 parts of a sealing groove, 1-3 parts of a radial oil return hole, 1-4 parts of an axial oil return hole, 1-5 parts of a limiting lug, 2 parts of an outer side oil return groove, 3 parts of a rotor shaft, 4 parts of a screw rotor, 5 parts of a labyrinth oil seal ring, 5 parts of a bearing, 6 parts of a compressor shell, 7 parts of a compression cavity.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification.
In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.
It will be further understood that the terms "comprises," "comprising," "includes," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Further, when a representation such as "… at least one" appears after the list of listed features, the entire listed feature is modified rather than modifying an individual element in the list.
As shown in fig. 1 to fig. 3, an oil blocking seat 1 of the present invention is of an annular structure, three circles of sealing grooves 1-1 are provided on an inner side wall of the oil blocking seat 1, a circle of outer oil return grooves 1-5 is provided on an outer side wall of the oil blocking seat, a plurality of radial oil return holes 1-2 are uniformly distributed on the side wall of the oil blocking seat, and the outer oil return grooves 1-5 are communicated with two adjacent circles of sealing grooves 1-1 through the radial oil return holes 1-2; two axial oil return holes 1-3 are formed in one end face of the oil retaining seat 1, the two axial oil return holes 1-3 are communicated with the other ring of sealing groove 1-1, and internal threads are formed in the axial oil return holes 1-3; the end face of the oil retaining seat where the axial oil return holes 1-3 are located is also provided with four limiting lugs 1-4.
As shown in fig. 4 and 5, the oil seal assembly of the screw compressor of the present invention includes a compressor housing 6, and a compression chamber 7, an oil return area and a bearing seat are disposed in the compressor housing 6; a screw rotor 3 is arranged in the compression cavity 7, a rotor shaft 2 extending out of the compression cavity 7 is arranged at the end part of the screw rotor 3, a labyrinth oil seal ring 4 and a bearing 5 are arranged on the rotor shaft 2, the labyrinth oil seal ring 4 is positioned in the oil return area, the bearing 5 is positioned in the bearing seat, and a plurality of labyrinth grooves are formed in the outer side wall of the labyrinth oil seal ring 4; a shell oil return groove is formed in the oil return area, the oil blocking seat 1 is also arranged in the oil return area, and the shell oil return groove is opposite to and communicated with the outer side oil return groove 1-5; the rotor shaft 2 penetrates through the oil baffle seat 1, and three circles of sealing grooves 1-1 are in clearance fit with the labyrinth oil seal ring 4 and are opposite to the labyrinth grooves; the oil blocking seat 1 is opposite to the bearing 5, the limiting lugs 1-4 are pressed against the outer ring of the bearing 5, the bearing 5 and the oil blocking seat 1 are prevented from axially moving, and the axial oil return holes 1-3 are opposite to the bearing 5.
When the screw rotor 3 rotates, the labyrinth oil seal ring 4 and the inner ring of the bearing 5 rotate along with the rotor shaft 2, the sealing groove 1-1 of the oil baffle seat 1 keeps static in an oil return area of the compressor shell 6, and lubricating oil for lubricating the bearing 5 flows into the labyrinth groove of the labyrinth oil seal ring 4 along the rotor shaft 2; the seal groove 1-1 of the oil baffle seat 1 is in clearance fit with the labyrinth oil seal ring 4 and is opposite to the labyrinth groove, lubricating oil in the labyrinth groove can be sealed in a space formed by the labyrinth groove and the seal groove 1-1, and the lubricating oil is prevented from continuously flowing onto the screw rotor 3 along the rotor shaft 2 and entering the compression cavity 7; part of the lubricating oil sealed in the labyrinth groove and the sealing groove 1-1 can flow out to a space formed by the shell oil return groove and the outer side oil return groove 1-5 along the radial oil return hole 1-2 to be temporarily stored, and then slowly flows back to the oil tank to be reused, so that the lubricating oil is prevented from leaking due to insufficient backflow; and a part of the lubricating oil sealed in the labyrinth groove and the sealing groove 1-1 can flow back to the end of the bearing 5 along the axial oil return hole 1-3 to lubricate the bearing 5.
Internal threads are arranged in the axial oil return holes 1-3, when the oil baffle seat 1 is installed in the compressor shell 6, a screw rod or a long screw can be in threaded connection with the axial oil return holes 1-3, the screw rod or the long screw is pushed to complete the installation work of the oil baffle seat 1, and then the screw rod or the long screw is dismounted, so that the operation is convenient; when the oil blocking seat 1 is disassembled, the screw rod or the long screw can be connected with the axial oil return hole 1-3 in a threaded manner, and then the screw rod or the long screw is pulled to disassemble the oil blocking seat 1 out of the compressor shell 6, so that the operation is convenient.
The above are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention; the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is within the spirit and scope of the present invention.
Claims (8)
1. An oil baffle seat is of an annular structure and is characterized in that at least one circle of sealing groove (1-1) is arranged on the inner side wall of the oil baffle seat; the side wall of the oil retaining seat is provided with at least one radial oil return hole (1-2), and the radial oil return hole (1-2) is communicated with at least one sealing groove (1-1); one end face of the oil retaining seat is provided with at least one axial oil return hole (1-3), and the axial oil return hole (1-3) is communicated with at least one sealing groove (1-1).
2. Oil baffle seat according to claim 1, characterized in that at least two axial oil return holes (1-3) are provided, and the axial oil return holes (1-3) are internally provided with internal threads.
3. Oil deflector according to claim 1, characterized in that the outer side wall of the oil deflector is provided with a ring of outer oil grooves (1-5), and the radial oil return holes (1-2) are communicated with the outer oil grooves (1-5).
4. Oil deflector according to claim 1, characterized in that the end surface of the oil deflector, where the axial oil return holes (1-3) are located, is provided with a plurality of limiting lugs (1-4).
5. An oil seal assembly of a screw compressor comprises a compressor shell (6), wherein a compression cavity (7), an oil return area and a bearing seat are arranged in the compressor shell (6), a screw rotor (3) is arranged in the compression cavity (7), a rotor shaft (2) extending out of the compression cavity (7) is arranged at the end part of the screw rotor (3), a labyrinth oil seal ring (4) and a bearing (5) are arranged on the rotor shaft (2), the labyrinth oil seal ring (4) is positioned in the oil return area, the bearing (5) is positioned in the bearing seat, and a plurality of labyrinth grooves are formed in the outer side wall of the labyrinth oil seal ring (4); the oil return area is internally provided with an oil blocking seat according to any one of claims 1 to 4, a rotor shaft (2) penetrates through the oil blocking seat, a sealing groove (1-1) is in clearance fit with a labyrinth oil sealing ring (4) and is opposite to the labyrinth groove, and an axial oil return hole (1-3) is opposite to a bearing (5).
6. The oil seal assembly of the screw compressor according to claim 5, wherein the end face of the oil baffle seat where the axial oil return hole (1-3) is located is provided with a plurality of limiting lugs (1-4), and the limiting lugs (1-4) are pressed against the outer ring of the bearing (5).
7. Oil seal assembly of a screw compressor according to claim 5, characterized in that a housing oil return groove is provided in the oil return area, said housing oil return groove communicating with the radial oil return holes (1-2).
8. The oil seal assembly of the screw compressor according to claim 7, wherein the outer side wall of the oil baffle seat is provided with a circle of outer oil return grooves 1-5, and the outer oil return grooves 1-5 are opposite to and communicated with the housing oil return grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222436394.8U CN218493809U (en) | 2022-09-15 | 2022-09-15 | Oil blocking seat and oil seal assembly of screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222436394.8U CN218493809U (en) | 2022-09-15 | 2022-09-15 | Oil blocking seat and oil seal assembly of screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218493809U true CN218493809U (en) | 2023-02-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222436394.8U Active CN218493809U (en) | 2022-09-15 | 2022-09-15 | Oil blocking seat and oil seal assembly of screw compressor |
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| Country | Link |
|---|---|
| CN (1) | CN218493809U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116857191A (en) * | 2023-05-10 | 2023-10-10 | 上海汉钟精机股份有限公司 | Vapor screw compressor with non-contact sealing structure |
-
2022
- 2022-09-15 CN CN202222436394.8U patent/CN218493809U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116857191A (en) * | 2023-05-10 | 2023-10-10 | 上海汉钟精机股份有限公司 | Vapor screw compressor with non-contact sealing structure |
| CN116857191B (en) * | 2023-05-10 | 2024-03-19 | 上海汉钟精机股份有限公司 | Vapor screw compressor with non-contact sealing structure |
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