CN213419888U - Gas protection type mechanical seal - Google Patents
Gas protection type mechanical seal Download PDFInfo
- Publication number
- CN213419888U CN213419888U CN202022472592.0U CN202022472592U CN213419888U CN 213419888 U CN213419888 U CN 213419888U CN 202022472592 U CN202022472592 U CN 202022472592U CN 213419888 U CN213419888 U CN 213419888U
- Authority
- CN
- China
- Prior art keywords
- gas
- ring
- sealing
- mechanical seal
- seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a gas protection formula mechanical seal, including balanced axle sleeve, elastic compensation element, the quiet ring of main seal, the main seal rotating ring, the axle sleeve is assisted sealed rotating ring, is assisted sealed quiet ring, elastic compensation element, o type circle, radial locking screw, and the isolation gas entry, the entry of isolation liquid, the export of isolation liquid etc.. The utility model discloses a dash into and keep apart the gas and let in the sealed chamber that the buffer formed well, structurally reduced medium itself or its impurity that contains to the influence of sealed face to guarantee mechanical seal's long period even running, this design application scope is wide, the equipment of specially adapted area impurity.
Description
Technical Field
The utility model relates to a gas protection type mechanical seal is a sealing device for rotating equipment prevents liquid leakage.
Background
At present, a screw machine commonly used in rotating equipment of oil refining and chemical devices is mostly used for recovering refining and chemical tail gas, and impurities and components are complex. The shaft seal mostly adopts double-end-face mechanical seal, the adopted isolation liquid is generally lubricating oil, and impurities contained in a medium in operation easily enter a sealing surface of a movable ring and a static ring of the main seal to cause the abrasion of the sealing surface and the leakage of the lubricating oil. And various complex components contained in the medium are easy to coke at the joint gap of the sealing surface, so that the sealing surface is slightly separated, and finally, the sealing leakage is caused, and the pollution is caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a gas protection type mechanical seal. The utility model provides an oil refining and chemical plant rotate the easy problem of leaking of screw rod machine mechanical seal in the equipment, through install the isolation gas additional on seal structure, mode such as balanced cover protects the mechanical seal face not receive the medium and its influence that contains impurity to guarantee the long period even running of equipment.
In order to achieve the above technical effects, the technical scheme of the utility model is that:
a gas protection type mechanical seal comprises a shaft sleeve and a balance shaft sleeve which are fixed on a main shaft, wherein a main seal movable ring and an auxiliary seal movable ring are fixed on the shaft sleeve; a main sealing static ring is arranged in cooperation with the main sealing dynamic ring, and an auxiliary sealing static ring is arranged in cooperation with the auxiliary sealing dynamic ring; the main sealing static ring is connected with a shaft seat through a first elastic compensation element, and the auxiliary sealing static ring is connected with the shaft seat through a second elastic compensation element; the shaft seat is provided with an isolating liquid cavity and a sealing air cavity; the contact part of the main seal movable ring and the main seal static ring and the contact part of the auxiliary seal movable ring and the auxiliary seal static ring are both positioned in the isolation liquid cavity; the isolating liquid cavity is communicated with an isolating liquid inlet and an isolating liquid outlet; the sealed air cavity is communicated with an isolated air inlet; the gap between the balance shaft sleeve and the shaft seat is communicated with the sealing air cavity.
In a further improvement, an O-shaped ring is fixed between the shaft sleeve and the shaft sleeve.
In a further improvement, the balance shaft sleeve is convexly formed with a plurality of step convex rings.
In a further improvement, the first elastic compensation element and the second elastic compensation element are both springs.
In a further improvement, the isolation gas inlet is communicated with a protective gas storage tank through a pressure regulating pump.
In a further improvement, the protective gas storage tank stores nitrogen or helium.
The utility model has the effects that:
1. the sealing effect is good, the application range is wide, and the sealing device can be applied to a multi-working-condition scene of a screw machine;
2. the reconstruction cost is low, and the resource consumption is low.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The sealing device comprises a main shaft 1, a balance shaft sleeve 2, a first elastic compensation element 3, a main sealing static ring 4, a main sealing movable ring 5, a shaft sleeve 6, an auxiliary sealing movable ring 7, an auxiliary sealing static ring 8, a second elastic compensation element 9, an O-shaped ring 10, a locking screw 11, an isolation gas inlet 12, an isolation liquid inlet 13, an isolation liquid outlet 14, a shaft seat 15, an isolation liquid cavity 16, a sealing gas cavity 17 and a stepped convex ring 18.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the following embodiments and accompanying drawings. A gas protection type mechanical seal comprises a shaft sleeve 6 and a balance shaft sleeve 2 which are fixed on a main shaft 1, wherein a main seal movable ring 5 and an auxiliary seal movable ring 7 are fixed on the shaft sleeve 6; the main sealing static ring 4 is arranged in cooperation with the main sealing dynamic ring 5, and the auxiliary sealing static ring 8 is arranged in cooperation with the auxiliary sealing dynamic ring 7; the main sealing static ring 4 is connected with a shaft seat 15 through a first elastic compensation element 3, and the auxiliary sealing static ring 8 is connected with the shaft seat 15 through a second elastic compensation element 9; the shaft seat 15 is provided with an isolating liquid cavity 16 and a sealing air cavity 17; the contact part of the main seal movable ring 5 and the main seal static ring 4 and the contact part of the auxiliary seal movable ring 7 and the auxiliary seal static ring 8 are both positioned in the isolation liquid cavity 16; the isolating liquid cavity 16 is communicated with an isolating liquid inlet 13 and an isolating liquid outlet 14; the sealed air cavity 17 is communicated with an isolated air inlet 12; the gap between the balance shaft sleeve 2 and the shaft seat 15 is communicated with the sealing air cavity 17.
An O-shaped ring 10 is fixed between the shaft sleeve 6 and the shaft sleeve 6. The balance shaft sleeve 2 is convexly formed with a plurality of stepped convex rings 18. Both the first elastic compensation element 3 and the second elastic compensation element 9 are springs. The isolation gas inlet 12 is communicated with a protective gas storage tank through a pressure regulating pump.
The protective gas storage tank stores nitrogen or helium.
When the equipment runs, the moving ring and the static ring rotate relatively, a liquid film is formed between the two end face seals by the isolating liquid to prevent dry grinding, an operator adjusts the air inlet pressure of protective air, the pressure is slightly greater than the medium pressure, the medium is difficult to enter the periphery of the sealing surface under the action of the balance sleeve, so that the good running environment of the sealing cavity is ensured, if a small medium enters the sealing cavity, the medium can be kept away from the sealing surface under the action of the protective air to be difficult to coke, partial heat generated during sealing rotation is taken away by the protective air, and the temperature of the sealing cavity is reduced. The medium with sealing belt impurity is converted into sealing isolation liquid and clean isolation gas, so that the cleanliness of the operation environment of the sealing cavity is improved, and the reliability of sealing long-period operation is ensured.
The above-mentioned is only a concrete direction embodiment of the utility model, nevertheless the utility model discloses a design concept is not limited to this, and all utilize this design right the utility model discloses carry out immaterial change, all should belong to the action of infringing the scope of protection of the utility model.
Claims (6)
1. A gas protection type mechanical seal is characterized by comprising a shaft sleeve (6) and a balance shaft sleeve (2) which are fixed on a main shaft (1), wherein a main seal movable ring (5) and an auxiliary seal movable ring (7) are fixed on the shaft sleeve (6); a main sealing static ring (4) is arranged in cooperation with the main sealing dynamic ring (5), and an auxiliary sealing static ring (8) is arranged in cooperation with the auxiliary sealing dynamic ring (7); the main sealing static ring (4) is connected with a shaft seat (15) through a first elastic compensation element (3), and the auxiliary sealing static ring (8) is connected with the shaft seat (15) through a second elastic compensation element (9); the shaft seat (15) is provided with an isolating liquid cavity (16) and a sealing air cavity (17); the contact part of the main seal movable ring (5) and the main seal static ring (4) and the contact part of the auxiliary seal movable ring (7) and the auxiliary seal static ring (8) are both positioned in the isolation liquid cavity (16); the isolating liquid cavity (16) is communicated with an isolating liquid inlet (13) and an isolating liquid outlet (14); the sealed air cavity (17) is communicated with an isolated air inlet (12); the gap between the balance shaft sleeve (2) and the shaft seat (15) is communicated with the sealed air cavity (17).
2. Gas-protected mechanical seal according to claim 1, wherein an O-ring (10) is fixed between the sleeve (6) and the sleeve (6).
3. Gas-protected mechanical seal according to claim 1, wherein the balance sleeve (2) is convexly formed with a plurality of stepped collars (18).
4. Gas-protected mechanical seal according to claim 1, wherein the first elastic compensating element (3) and the second elastic compensating element (9) are both springs.
5. A gas-protected mechanical seal as claimed in claim 1, wherein the barrier gas inlet (12) is connected to a storage tank for the shielding gas by a pressure regulating pump.
6. The gas-protected mechanical seal of claim 5, wherein the shielding gas storage tank stores nitrogen or helium gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022472592.0U CN213419888U (en) | 2020-10-31 | 2020-10-31 | Gas protection type mechanical seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022472592.0U CN213419888U (en) | 2020-10-31 | 2020-10-31 | Gas protection type mechanical seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213419888U true CN213419888U (en) | 2021-06-11 |
Family
ID=76248756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022472592.0U Active CN213419888U (en) | 2020-10-31 | 2020-10-31 | Gas protection type mechanical seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213419888U (en) |
-
2020
- 2020-10-31 CN CN202022472592.0U patent/CN213419888U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203823072U (en) | Cartridge mechanical seal device | |
| CN105090518A (en) | Corrugated pipe type dry gas seal device and seal method | |
| CN213419888U (en) | Gas protection type mechanical seal | |
| CN201771834U (en) | Sealing structure of turbopump assembly | |
| CN108547952A (en) | Labyrinth type end face mechanical sealing device | |
| CN210372013U (en) | Mechanical sealing device suitable for multiple working conditions | |
| CN201818538U (en) | Hydraulic slide-valve type stop sealing mechanism for dynamic sealing of auxiliary impeller in centrifugal pump | |
| CN211738029U (en) | Sealing device for kettle combining carbon ring and dry-running mechanical seal | |
| CN103321946B (en) | It is automatically adjusted no-water sealing device | |
| CN209170100U (en) | Well submersible motor sand-prevention structure | |
| CN208546524U (en) | A kind of spring protection formula mechanical seal | |
| CN208348518U (en) | Mechanically-sealing apparatus with sealing ring protection | |
| CN208703129U (en) | A kind of mechanically-sealing apparatus of erosion resistant | |
| CN202228416U (en) | Pump shaft sealing device for cargo oil pump | |
| CN209430470U (en) | A kind of filter pressing pump that sealing life can be improved | |
| CN202597215U (en) | Mechanical seal for coolant drain tank pump | |
| CN215334439U (en) | Mechanical sealing device | |
| CN201443596U (en) | Anti-blockage mechanical seal device with metal corrugated pipe | |
| CN206129685U (en) | Oiling formula fan shaft seal device | |
| GB831707A (en) | Improvements relating to shaft sealing arrangements for gas-cooled dynamo-electric machines | |
| GB1289442A (en) | ||
| CN209444958U (en) | A kind of whirl compensator sealing structure with the level on outer tube inner convex platform | |
| CN217380994U (en) | Water seal type gap sealing device for water pump | |
| CN215058415U (en) | Mechanical seal protection architecture of water pump | |
| CN217270987U (en) | Pressure water seal gas-isolation type magnetic fluid combined sealing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |