CN218093445U - Combined sealing structure of Roots vapor compressor - Google Patents
Combined sealing structure of Roots vapor compressor Download PDFInfo
- Publication number
- CN218093445U CN218093445U CN202222346078.1U CN202222346078U CN218093445U CN 218093445 U CN218093445 U CN 218093445U CN 202222346078 U CN202222346078 U CN 202222346078U CN 218093445 U CN218093445 U CN 218093445U
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- rotor shaft
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- 238000007789 sealing Methods 0.000 title claims abstract description 84
- 230000003068 static effect Effects 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 12
- 230000000694 effects Effects 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000001050 lubricating effect Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 16
- 239000004519 grease Substances 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The utility model discloses a roots vapor compressor combined seal structure, include: the rotor shaft is connected with the compressor rotor in a matched manner to rotate, the rotor shaft is connected to the steam chamber and the oil chamber, a gap pressure equalizing device is arranged on the matching end surface of the rotor shaft and the steam chamber, and a mechanical sealing device is adopted on the matching end surface of the rotor shaft and the oil chamber to realize combined sealing; a gap is reserved between the gap pressure equalizing device and the mechanical sealing device to form an intermediate chamber, and the intermediate chamber is communicated with an inlet of the compressor to form negative pressure; the device seals a steam chamber, an oil chamber and an intermediate chamber in the Roots vapor compressor respectively by arranging combined seals, so that the oil chamber has better lubricating and sealing effects; the gap pressure equalizing device is adopted for sealing, so that the maintenance is convenient; by adopting a gap pressure-equalizing device and a mechanical sealing device, after the steam chamber leaks a little, condensed water is prevented from entering an oil chamber, and oil reacts with water to emulsify the oil and destroy the lubricating property.
Description
Technical Field
The utility model relates to a vapor roots compressor that MVR (vapor recompression formula evaporimeter) evaporimeter used especially relates to a roots vapor compressor combined seal structure.
Background
The existing vapor roots compressors used in the MVR (vapor recompression evaporator) evaporators are mostly sealed with double-end-face mechanical seals, framework seals and the like at two sides of a vapor chamber and an oil chamber. Wherein, the mechanical seal with double end faces is easy to wear in a steam chamber and has too short service life; the skeleton seal is prone to leakage. The publication No. CN 216241301U provides a sealing device for a rotating shaft of a Roots type steam compressor, which forms a sealing cavity by arranging a sealing sleeve, an oil seal, a sealing wall plate and a gland, and when the sealing device is used, certain sealing water is injected into the sealing cavity, and sealing is carried out through an oil seal structure, so that the problems that the traditional mechanical seal is easy to wear and damage and the maintenance and replacement cost is increased due to the lubricating and cooling effects of the sealing water are solved; publication No. CN 111503044A provides a vapor compressor sealing device. The sealing shell is fixedly connected with the diffuser and surrounds the periphery of the impeller shaft, a first sealing structure and a second sealing structure are arranged on the inner periphery of the sealing shell along the direction of the diffusion direction-finding normal pressure side, the first sealing structure comprises convex blocks arranged along the axial direction of the impeller shaft, cavities are arranged among the convex blocks, the cavities are rectangular in shape, gaps are formed between the convex blocks and the impeller shaft, the second sealing structure comprises a carbon ring seal, and the two sealing devices of the device are arranged on the same side of a rotating shaft and are not suitable for a Roots type multi-chamber structure.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a roots vapor compressor combined sealing structure.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a roots vapor compressor combined sealing structure comprises: the rotor shaft is matched and connected with a compressor rotor to rotate, the rotor shaft is connected to the steam chamber and the oil chamber, a gap pressure equalizing device is arranged on the matching end surface of the rotor shaft and the steam chamber, and a mechanical sealing device is adopted on the matching end surface of the rotor shaft and the oil chamber to realize combined sealing;
and a gap is reserved between the gap pressure equalizing device and the mechanical sealing device to form an intermediate chamber, and the intermediate chamber is communicated with an inlet of the compressor to form negative pressure.
As a further description of the above technical solution: the rotor shaft with the rotor cooperation to outwards extend, clearance pressure equalizing device sets up the extension of rotor shaft, clearance pressure equalizing device includes: and a U-shaped equalizing ring is arranged on one side of the sealing gap, and the structures are repeated and connected in sequence to form the internal structure of the gap equalizing device.
As a further description of the above technical solution: and an end cover is arranged on the outer side of the extension section of the rotor shaft, an end cover steam chamber sealing hole is formed in the end cover, and the inner diameter of the end cover steam chamber sealing hole is matched and connected with the outer diameter of the gap pressure equalizing device.
As a further description of the above technical solution: a bearing box and a gasket are arranged between the transmission gear and the end cover, a bearing is arranged inside the bearing box, and the inner diameter of the bearing is matched with the rotor shaft by fixing the position of the gasket.
As a further description of the above technical solution: the rotor shaft is connected with the transmission gear in a matched mode through a screw; the end cover, the bearing box and the gasket are connected in a matched mode through screws.
As a further description of the above technical solution: and the mechanical sealing device is arranged on the end face of the bearing box matched with the rotor shaft.
As a further description of the above technical solution: the mechanical sealing device comprises: the mechanical seal static ring and the mechanical seal moving ring are matched with each other to seal an oil chamber.
As a further description of the above technical solution: the mechanical seal static ring is arranged between the end faces of the rotor shaft and the bearing box, and is provided with an annular groove for placing a first seal ring.
As a further description of the above technical solution: one end of the mechanical seal static ring is provided with a mechanical seal moving ring, and the inner side of the mechanical seal moving ring is provided with a second sealing ring.
As a further description of the above technical solution: the gap pressure equalizing device and the mechanical sealing device seal two sides of the end cover through the rotor shaft, and the containing cavity in the end cover is used as a middle chamber and can be used for carrying out combined sealing on three chambers of the Roots compressor.
The technical scheme has the following advantages or beneficial effects:
1. through setting up the combination seal, seal vapour room, grease chamber and intermediate chamber among the roots vapor compressor respectively, make grease chamber lubrication sealing effect better.
2. And the gap pressure equalizing device is adopted for sealing, so that the maintenance is convenient.
3. Adopt clearance pressure-equalizing device and mechanical seal device, prevent to have a little after revealing, make the oil emulsification with water reaction, destroy the lubricity.
Drawings
Fig. 1 is a schematic structural view of a combined sealing structure provided by the present invention;
fig. 2 is a partial view at a in fig. 1.
Illustration of the drawings:
1. a rotor shaft; 2. a rotor; 3. a gap pressure equalizing device; 4. a mechanical seal device; 5. an end cap; 6. end cover steam chamber sealing holes; 7. a transmission gear; 8. a bearing box; 9. a gasket; 10. a bearing; 11. a mechanical seal stationary ring; 12. a mechanical seal movable ring; 13. a first seal ring; 14. a second seal ring; 15. and (6) a grading ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides an embodiment: a roots vapor compressor combined sealing structure comprises: the rotor shaft 1 is connected with the compressor rotor 2 in a matched mode to rotate, the rotor shaft 1 is connected to the steam chamber and the oil chamber, a gap pressure equalizing device 3 is arranged on the matching end face of the rotor shaft 1 and the steam chamber, and a mechanical sealing device 4 is adopted on the matching end face of the rotor shaft 1 and the oil chamber to achieve combined sealing;
a gap is reserved between the gap pressure equalizing device 3 and the mechanical sealing device 4 to form an intermediate chamber, and the intermediate chamber is communicated with the inlet of the compressor to form negative pressure.
Through set up the composite seal device on rotor shaft 1, make the steam chamber, the grease chamber of being connected with rotor shaft 1 seal up by clearance pressure-sharing device 3 and mechanical seal device 4 respectively, make seal chamber's sealed effect better, difficult emergence is leaked, form the intermediate chamber between clearance pressure-sharing device 3 and mechanical seal device 4, play the cushioning effect, can avoid steam chamber or grease chamber arbitrary one side to leak simultaneously, directly produce the influence to the airtight cavity of opposite side.
In this embodiment, gaps are formed between the equalizing rings 15, the gap distance is 2-3mm, and the equalizing rings 15 are sequentially connected with the equalizing gaps to form an internal framework of the gap equalizing device 3. One side of the rotor shaft 1 is connected with a driving device, the pressure of steam chambers on two sides of the rotor 2 is large, and the pressure equalization on two sides is realized after different pressures at two ends of the gap equalization device 3 enter the equalization ring 15. Grading ring 15 is U type structure, realizes undulant pressure-equalizing, avoids the sudden pressure drop to make rotor shaft 1 and rotor 2 cooperation dislocation, leads to the steam chamber to seal and reveals.
An end cover 5 is arranged on the outer side of the extending section of the rotor shaft 1, an end cover steam chamber sealing hole 6 is formed in the end cover 5, and the inner diameter of the end cover steam chamber sealing hole 6 is matched and connected with the outer diameter of the gap pressure equalizing device 3.
Through the cooperation connection of the end cover steam chamber sealing hole 6 on the end cover 5 and the clearance pressure equalizing device 3 on the rotor shaft 1, the internal structure of the clearance pressure equalizing device 3 is matched with the inner diameter of the end cover steam chamber sealing hole 6 to jointly form the clearance pressure equalizing device 3.
A bearing box 8 and a gasket 9 are arranged between the transmission gear 7 and the end cover 5, a bearing 10 is arranged in the bearing box 8, and the inner diameter of the bearing 10 is matched with the rotor shaft 1 through the fixing position of the gasket 9.
The inside of bearing box 8 is equipped with bearing 10, cooperatees with the external diameter of bearing 10, is equipped with gasket 9 at bearing box 8 and bearing 10 complex one side terminal surface, and gasket 9 prevents that bearing 10 from falling out with bearing 10 spacing in bearing box 8's inside, at another terminal surface and the contact of drive gear 7 of gasket 9.
The rotor shaft 1 is connected with the transmission gear 7 in a matched manner through a screw; the end cover 5, the bearing box 8 and the gasket 9 are connected in a matched mode through screws.
One end of the rotor shaft 1 is connected with the transmission gear 7 through a screw, so that the transmission gear 7 synchronously rotates along with the rotor shaft 1, and the end cover 5, the bearing box 8 and the gasket 9 are connected in a matched mode through screws, so that the bearing 10 is prevented from falling out, and the matching relation is tighter.
The end face of the bearing box 8 matched with the rotor shaft 1 is provided with a mechanical sealing device 4.
The mechanical sealing device 4 seals the oil chamber, and prevents the lubricating oil in the oil chamber from leaking to increase friction and damage the machine.
As shown in fig. 2, the mechanical seal device 4 includes: the mechanical seal static ring 11 and the mechanical seal moving ring 12 are matched with each other to seal an oil chamber, and the mechanical seal static ring 11 and the mechanical seal moving ring 12 are matched with each other to seal the oil chamber.
In this embodiment, the mechanical seal static ring 11 is arranged inside the bearing box 8, the mechanical seal moving ring 12 is arranged on the rotor shaft 1 of the middle chamber outside the bearing box 8, the mechanical seal static ring 11 is attached to one side end face of the mechanical seal moving ring 12, and one side of the mechanical seal moving ring 12 is provided with a limiting rod to prevent the mechanical seal moving ring 12 from being displaced too much.
In this embodiment, be equipped with the spring between mechanical seal quiet ring 11 and the bearing box 8, the spring is pushed mechanical seal quiet ring 11 to mechanical seal rotating ring 12, and mechanical seal rotating ring 12 is limited under the effect displacement of gag lever post, forms sealedly, and it has the annular groove to open on the mechanical seal quiet ring 11 for place first sealing washer 13, makes the leakproofness better.
One end of the mechanical seal static ring 11 is provided with a mechanical seal moving ring 12, and the inner side of the mechanical seal moving ring 12 is provided with a second seal ring 14.
The sealing effect is better, and in the embodiment, the first sealing ring 13 and the second sealing ring 14 are O-shaped sealing rings.
The clearance pressure equalizing device 3 and the mechanical sealing device 4 seal two sides of the end cover 5 through the rotor shaft 1, and the containing cavity in the end cover 5 is used as a middle chamber and can be used for carrying out combined sealing on three chambers of the Roots compressor.
Through the cooperation of the rotor shaft 1 and the end cover 5, a gap pressure equalizing device is arranged at a sealing hole 6 of an end cover steam chamber of the end cover 5, an intermediate chamber is arranged in the end cover 5, an oil chamber is arranged on a bearing box 8, which is connected with the transmission gear 7, of the end cover 5, and the steam chamber, the oil chamber and the intermediate chamber are well sealed through the gap pressure equalizing device 3 and the mechanical sealing device 4.
The working principle is as follows: the rotor shaft 1 drives the transmission gear 7 to rotate, the rotor shaft 1 is provided with an end cover 5, and a gap pressure equalizing device is arranged at a sealing hole 6 of an end cover steam chamber of the end cover 5 to perform pressure equalizing and sealing on the steam chamber; the inner part of the end cover 5 is provided with an intermediate chamber, a bearing box 8 is arranged between the intermediate chamber and the transmission gear, and a mechanical sealing device 4 is arranged at the joint of the bearing box 8 and the rotor shaft 1 and used for sealing an oil chamber on the bearing box 8 to prevent lubricating oil from leaking to cause mechanical friction increase and damage to mechanical parts.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (10)
1. A roots vapor compressor combined sealing structure comprises: rotor shaft (1), with compressor rotor (2) cooperation be connected and rotate its characterized in that: the rotor shaft (1) is connected to the steam chamber and the oil chamber, a gap pressure equalizing device (3) is arranged on the matching end surface of the rotor shaft (1) and the steam chamber, and a mechanical sealing device (4) is adopted on the matching end surface of the rotor shaft (1) and the oil chamber to realize combined sealing;
and a gap is reserved between the gap pressure equalizing device (3) and the mechanical sealing device (4) to form an intermediate chamber, and the intermediate chamber is communicated with an inlet of the compressor to form negative pressure.
2. The roots vapor compressor combined seal structure according to claim 1, wherein: the rotor shaft (1) is matched with the rotor (2) and extends outwards, the gap pressure equalizing device (3) is arranged at the extending section of the rotor shaft (1), and the gap pressure equalizing device (3) comprises: and a U-shaped equalizing ring (15) is arranged on one side of the sealing gap and sequentially connected by repeating the structure to form the internal structure of the gap equalizing device (3).
3. The roots vapor compressor combined seal structure according to claim 1, wherein: an end cover (5) is arranged on the outer side of the extending section of the rotor shaft (1), an end cover steam chamber sealing hole (6) is formed in the end cover (5), and the inner diameter of the end cover steam chamber sealing hole (6) is matched and connected with the outer diameter of the gap pressure equalizing device (3).
4. The roots vapor compressor combined seal structure according to claim 3, wherein: the transmission gear (7) and be equipped with bearing box (8) and gasket (9) between end cover (5), the inside of bearing box (8) is provided with bearing (10), through gasket (9) fixed position makes the internal diameter of bearing (10) with rotor shaft (1) cooperation.
5. The roots vapor compressor combined sealing structure according to claim 4, wherein: the rotor shaft (1) is connected with the transmission gear (7) in a matched manner through a screw; the end cover (5), the bearing box (8) and the gasket (9) are connected in a matched mode through screws.
6. The roots vapor compressor combined sealing structure according to claim 5, wherein: the mechanical sealing device (4) is arranged on the end face of the bearing box (8) matched with the rotor shaft (1).
7. The roots vapor compressor combined sealing structure according to claim 5, wherein: the mechanical sealing device (4) comprises: the oil seal comprises a mechanical seal static ring (11) and a mechanical seal moving ring (12), wherein the mechanical seal static ring (11) and the mechanical seal moving ring (12) are matched to seal an oil chamber.
8. The roots vapor compressor combined sealing structure according to claim 7, wherein: the mechanical seal static ring (11) is arranged between the rotor shaft (1) and the end face matched with the bearing box (8), and an annular groove is formed in the mechanical seal static ring (11) and used for placing a first seal ring (13).
9. The roots vapor compressor combined sealing structure according to claim 7, wherein: one end of the mechanical seal static ring (11) is provided with a mechanical seal moving ring (12), and the inner side of the mechanical seal moving ring (12) is provided with a second seal ring (14).
10. The roots vapor compressor combined sealing structure according to claim 3, wherein: the gap pressure equalizing device (3) and the mechanical sealing device (4) seal two sides of the end cover (5) through the rotor shaft (1), and a cavity in the end cover (5) is used as a middle chamber and can be used for carrying out combined sealing on three chambers of the Roots compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222346078.1U CN218093445U (en) | 2022-09-02 | 2022-09-02 | Combined sealing structure of Roots vapor compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222346078.1U CN218093445U (en) | 2022-09-02 | 2022-09-02 | Combined sealing structure of Roots vapor compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218093445U true CN218093445U (en) | 2022-12-20 |
Family
ID=84452467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222346078.1U Active CN218093445U (en) | 2022-09-02 | 2022-09-02 | Combined sealing structure of Roots vapor compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218093445U (en) |
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2022
- 2022-09-02 CN CN202222346078.1U patent/CN218093445U/en active Active
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