CN214146560U - Oil-gas isolated combined sealing structure for screw fan - Google Patents
Oil-gas isolated combined sealing structure for screw fan Download PDFInfo
- Publication number
- CN214146560U CN214146560U CN202120022846.0U CN202120022846U CN214146560U CN 214146560 U CN214146560 U CN 214146560U CN 202120022846 U CN202120022846 U CN 202120022846U CN 214146560 U CN214146560 U CN 214146560U
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- Prior art keywords
- groove
- ring
- draw
- sliding bearing
- oil
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- 238000007789 sealing Methods 0.000 title claims description 19
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 9
- 230000003068 static Effects 0.000 claims description 6
- 230000004301 light adaptation Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 6
- 239000000945 filler Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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Abstract
The utility model discloses an isolated combination seal structure of oil gas for screw fan, including nested pivot sliding bearing cover, sliding bearing cover's inner wall has the round to set up along inner wall circumference annular groove, it is sealed to be equipped with the piston ring in the annular groove, sliding bearing cover's outer wall is equipped with a plurality of first draw-in grooves, first draw-in groove is equipped with the mount pad of installing on the casing outward, it is sealed in the O type circle of the first draw-in groove of annular to pack the adaptation in first draw-in groove, along the leakage direction of liquid, be equipped with the second draw-in groove on sliding bearing cover outer wall at first draw-in groove rear, be equipped with the rotating ring of magnetic seal on the second draw-in groove, be equipped with the quiet ring of magnetic seal behind the rotating ring, the protruding height of quiet ring is greater than the rotating ring, the notch that forms between rotating ring and quiet ring is through installing the mount pad packing on the casing. Adopt the utility model discloses a design, the piston ring is sealed to form the atmoseal to under the cooperation through the sealed oil blanket of magnetic force, all restrict oil gas in the cylinder body.
Description
Technical Field
The utility model belongs to the technical field of screw fan part, concretely relates to screw fan is with isolated combination seal structure of oil gas.
Background
The screw fan is a positive displacement fan, the working pressure is higher, the temperature is higher when the screw fan works at 80KPA-150 KPA. The sealing between the main shaft and the shell of the traditional Roots blower generally adopts a rubber framework oil seal sealing structure, and the phenomenon of oil leakage is easily caused by damage when a sealing element is operated under a long-time high-temperature environment, so that the framework oil seal becomes a vulnerable part of the Roots blower, and the service pressure of the screw blower is higher, so that the framework oil seal is more easily damaged.
SUMMERY OF THE UTILITY MODEL
The technical problem is as follows: the utility model aims to solve the problem that the sealing effect is poor and the damage is easy for the existing screw fan.
The technical scheme is as follows: the utility model adopts the following technical scheme:
the utility model provides an isolated combination seal structure of oil gas for screw fan, including nested in changeing epaxial sliding bearing cover, sliding bearing cover's inner wall has the annular groove that the round set up along inner wall circumference, be equipped with the piston ring seal in the annular groove, sliding bearing cover's outer wall is equipped with a plurality of first draw-in grooves, first draw-in groove is equipped with the mount pad of installing on the casing outward, the intussuseption of first draw-in groove intussuseption is sealed in the O type circle of the first draw-in groove of annular, along the leakage direction of liquid, be equipped with the second draw-in groove on sliding bearing cover outer wall at first draw-in groove rear, be equipped with the rotating ring of magnetic seal on the second draw-in groove, be equipped with the quiet ring of magnetic seal behind the rotating ring, the protruding height of quiet ring is greater than the rotating ring, the notch that forms between rotating ring and quiet ring is through installing the mount pad packing on the casing.
Through the design of piston ring, can be with gaseous isolated in the cylinder body, and through the cooperation of magnetic seal, the problem that can not produce the leakage in oil filler hole department.
Further, the piston ring seal is a notched circular metal ring seal, and the diameter of the flared metal ring seal is larger than the inner diameter of the annular groove.
Through the design, the piston ring can always abut against the outer wall of the annular groove after being mounted in the annular groove in a sealing mode to form sealing.
Further, the diameter of the combined metal ring seal is larger than that of the rotating shaft and smaller than the inner diameter of the annular groove.
Through the design, the thickness of the piston ring seal is smaller than the depth of the annular groove, so that the piston ring can still generate axial displacement in the annular groove, and the piston ring seal is pressed by air pressure or always abutted against one side wall surface of the annular groove far away from the cylinder body, so that the sealing effect is improved.
Furthermore, one side of the static ring, which is far away from the rotating ring, is provided with an inner groove facing the rotating shaft and an outer groove back to the rotating shaft, the inner groove is provided with an O-shaped ring seal, and the outer groove fixes the static ring between the shell and the sliding bearing sleeve through a mounting seat.
Through O type circle sealing, one is in order to reduce the rotation frequency of sliding bearing cover, secondly makes the lubricating oil of oil filler point department directly pass through the last through-hole of rotating ring and the sliding bearing that the rotating ring department corresponds sheathe in the through-hole and directly gets into in the sliding bearing cover and form the oil film, and the existence of oil film has also further improved the isolated effect of gas simultaneously.
There is an implicit requirement that the rotating ring be positioned in front of the annular groove, depending on the direction of leakage.
Furthermore, an oil filling hole is arranged on the mounting seat outside the movable ring.
Has the advantages that: compared with the prior art, the utility model has the advantages of it is following:
adopt the utility model discloses a design, the piston ring is sealed to form the atmoseal to under the cooperation through the sealed oil blanket of magnetic force, all restrict oil gas in the cylinder body.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional effect diagram of the present invention;
fig. 3 is a schematic structural view of a piston ring seal.
Detailed Description
The invention will be further explained below with reference to the drawings and examples.
Example 1
As shown in the attached drawings 1 to 3, an oil-gas isolation combined sealing structure for a screw fan comprises a sliding bearing sleeve 1 nested on a rotating shaft, wherein the inner wall of the sliding bearing sleeve 1 is provided with a ring-shaped groove 2 arranged along the circumferential direction of the inner wall, a piston ring seal 3 is arranged in the ring-shaped groove 2, the outer wall of the sliding bearing sleeve 1 is provided with a plurality of first clamping grooves 4, a mounting seat 5 arranged on a shell is arranged outside the first clamping grooves 4, the first clamping grooves 4 are filled with O-shaped ring seals (not shown) matched with the ring-shaped first clamping grooves 4, and along the leakage direction of liquid, be equipped with second draw-in groove 6 on the sliding bearing cover outer wall in first draw-in groove 4 rear, be equipped with the rotating ring 7 of magnetic force seal on the second draw-in groove 6, be equipped with the quiet ring 8 of magnetic force seal behind the rotating ring 7, the protruding height of quiet ring 8 is greater than rotating ring 7, and the notch that forms between rotating ring 7 and quiet ring 8 is through installing 5 packings of mount pad on the casing.
Through the design of piston ring, can be with gaseous isolated in the cylinder body, and through the cooperation of magnetic seal, the problem that can not produce the leakage in oil filler hole department.
The piston ring seal 3 is a notched circular metal ring seal, and the diameter of the expanded metal ring seal is larger than the inner diameter of the annular groove 2.
Through the design, the piston ring can always abut against the outer wall of the annular groove after being mounted in the annular groove in a sealing mode to form sealing.
The diameter of the combined metal ring seal is larger than that of the rotating shaft and smaller than the inner diameter of the annular groove 2.
Through the design, the thickness of the piston ring seal is smaller than the depth of the annular groove, so that the piston ring can still generate axial displacement in the annular groove, and the piston ring seal is pressed by air pressure or always abutted against one side wall surface of the annular groove far away from the cylinder body, so that the sealing effect is improved.
An inner groove 9 facing the rotating shaft and an outer groove 10 facing away from the rotating shaft are arranged on one side, away from the rotating ring 7, of the static ring 8, the inner groove 9 is provided with an O-shaped ring seal, and the outer groove 10 fixes the static ring between the shell and the sliding bearing sleeve 1 through a mounting seat.
Through O type circle sealing, one is in order to reduce the rotation frequency of sliding bearing cover, secondly makes the lubricating oil of oil filler point department directly pass through the last through-hole of rotating ring and the sliding bearing that the rotating ring department corresponds sheathe in the through-hole and directly gets into in the sliding bearing cover and form the oil film, and the existence of oil film has also further improved the isolated effect of gas simultaneously.
There is an implicit requirement that the rotating ring be positioned in front of the annular groove, depending on the direction of leakage.
An oil filling hole 11 is arranged on the mounting seat outside the movable ring 7.
Claims (5)
1. The utility model provides an isolated combination seal structure of oil gas for screw fan which characterized in that: including nested pivot epaxial sliding bearing cover, sliding bearing cover's inner wall has the annular groove that the round set up along inner wall circumference, it is sealed to be equipped with the piston ring in the annular groove, sliding bearing cover's outer wall is equipped with a plurality of first draw-in grooves, first draw-in groove is equipped with the mount pad of installing on the casing outward, the intussuseption of first draw-in groove is sealed in the O type circle of the first draw-in groove of annular, along the leakage direction of liquid, be equipped with the second draw-in groove on sliding bearing cover outer wall at first draw-in groove rear, be equipped with the rotating ring of magnetic force seal on the second draw-in groove, be equipped with the quiet ring of magnetic force seal behind the rotating ring, the protruding height of quiet ring is greater than the rotating ring, the notch that forms between rotating ring and quiet ring is through installing the mount pad packing on the casing.
2. The oil-gas isolating combined sealing structure for the screw fan according to claim 1, characterized in that: the piston ring seal is a notched circular metal ring seal, and the diameter of the expanded metal ring seal is larger than the inner diameter of the annular groove.
3. The oil-gas isolating combined sealing structure for the screw fan according to claim 1, characterized in that: the diameter of the combined metal ring seal is larger than that of the rotating shaft and smaller than the inner diameter of the annular groove.
4. The oil-gas isolating combined sealing structure for the screw fan according to claim 1, characterized in that: one side of the static ring, which is far away from the dynamic ring, is provided with an inner groove facing the rotating shaft and an outer groove back to the rotating shaft, the inner groove is provided with an O-shaped ring seal, and the outer groove fixes the static ring between the shell and the sliding bearing sleeve through the mounting seat.
5. The oil-gas isolating combined sealing structure for the screw fan according to claim 1, characterized in that: an oil filling hole is arranged on the mounting seat outside the movable ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120022846.0U CN214146560U (en) | 2021-01-06 | 2021-01-06 | Oil-gas isolated combined sealing structure for screw fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120022846.0U CN214146560U (en) | 2021-01-06 | 2021-01-06 | Oil-gas isolated combined sealing structure for screw fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214146560U true CN214146560U (en) | 2021-09-07 |
Family
ID=77546542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120022846.0U Active CN214146560U (en) | 2021-01-06 | 2021-01-06 | Oil-gas isolated combined sealing structure for screw fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214146560U (en) |
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2021
- 2021-01-06 CN CN202120022846.0U patent/CN214146560U/en active Active
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