CN112727800A - Double-end-face mechanical sealing device for sand pump - Google Patents
Double-end-face mechanical sealing device for sand pump Download PDFInfo
- Publication number
- CN112727800A CN112727800A CN202110218026.3A CN202110218026A CN112727800A CN 112727800 A CN112727800 A CN 112727800A CN 202110218026 A CN202110218026 A CN 202110218026A CN 112727800 A CN112727800 A CN 112727800A
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- CN
- China
- Prior art keywords
- end cover
- mechanical seal
- rear end
- cover
- ring
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
Abstract
The invention discloses a double-end-face mechanical sealing device for a sand pump, which relates to the technical field of exploration drilling and comprises a shaft sleeve (1), a front end cover (2), a pump cover (3), a rear end cover (6), a static ring (7) and a mechanical seal rotating piece, wherein the front end cover (2) and the rear end cover (6) are respectively arranged on two sides of the pump cover (3); the upper end and the lower end of the pump cover (3) are respectively provided with a liquid inlet hole pipe plug (4) and a liquid outlet hole pipe plug (13); a transverse shaft sleeve (1) is arranged between the front end cover (2) and the rear end cover (6), and two ends of the shaft sleeve (1) respectively penetrate out of the front end cover (2) and the rear end cover (6); two ends of the shaft sleeve (1) are respectively provided with a static ring (7) and a mechanical seal rotating piece which are symmetrical, and the mechanical seal rotating pieces at the two ends are connected and pressed through a spring (12). The invention solves the problems of serious spring abrasion and weakened sealing performance of the sealing surface, and achieves the effects of convenient maintenance, reliable sealing and long service life.
Description
Technical Field
The invention relates to the technical field of exploration drilling, in particular to a double-end-face mechanical sealing device for a sand pump.
Background
In the exploration drilling process of petroleum, natural gas and the like, drilling mud needs to go through a plurality of strata, the working condition is complex, the specific gravity of the drilling fluid is high, the viscosity is high, a plurality of chemical additives are contained, and a large amount of drill chip particles are carried. The sand pump is used as a main device for conveying drilling mud in a solid control system, and has high requirements on mechanical sealing. At present, a pump for solid control at foreign countries adopts a single-end-face mechanical seal, and has several ways of mechanical seal, packing seal and oil seal at home, but the sealing effect of the packing seal and the oil seal is poor.
The existing mechanical seal applied to a sand pump is a single-end-face mechanical seal, working elements such as a seal moving ring and a spring work in mud, the structure is mainly in drilling mud, the working elements are easy to wear and corrode, leakage is caused, particularly, in the use working condition of high-specific-gravity mud, the abrasion to the spring is very serious, the sealing performance of a sealing surface is weakened, and the risk of leakage exists, for example, a patent document with the application number of '201320843424.5' discloses a mechanical seal device connected in series with a pump, although the mechanical seal device improves a certain sealing effect, the structure is complex, and the device cost is high.
Disclosure of Invention
The invention aims to provide a double-end-face mechanical sealing device for a sand pump, aiming at the problems that a spring is seriously abraded and the sealing performance of a sealing face is weakened.
The utility model provides a sand pump is with two terminal surface mechanical seal device, includes axle sleeve, front end housing, pump cover, rear end housing, quiet ring and mechanical seal rotating member, wherein:
a front end cover and a rear end cover are respectively arranged on two sides of the pump cover;
the upper end and the lower end of the pump cover are respectively provided with a liquid inlet hole pipe plug and a liquid outlet hole pipe plug;
a transverse shaft sleeve is arranged between the front end cover and the rear end cover, and two ends of the shaft sleeve respectively penetrate out of the front end cover and the rear end cover;
two ends of the shaft sleeve are respectively provided with a static ring and a mechanical seal rotating piece which are symmetrical, and a spring for compressing left and right sealing surfaces is arranged between the mechanical seal rotating pieces at the two ends and is compressed by the spring;
the mechanical seal rotating part comprises a moving ring, a rubber corrugated pipe, a moving ring seat and a push ring, wherein the moving ring seat is installed on the shaft sleeve, clamping grooves are formed in the front end and the rear end of the moving ring seat respectively, the moving ring is arranged in the clamping groove in the front end of the moving ring seat, the front end of the moving ring is connected with the rear end of the static ring, the push ring is arranged in the clamping groove in the rear end of the moving ring seat, a spring is arranged on the push ring, the rubber corrugated pipe used for providing micro compensation of the moving ring is arranged between the moving ring seat and the shaft sleeve, and the rubber corrugated pipe is tightly matched with the shaft sleeve.
Preferably, the front end cover, the rear end cover and the pump cover form a sealed cavity.
Preferably, the front end cover and the rear end cover are connected with the front end of the stationary ring through anti-rotation pins.
Preferably, O-shaped sealing rings are arranged between the front end cover and the upper end of the stationary ring and between the rear end cover and the upper end of the stationary ring.
Preferably, sealing rings are arranged between the front end cover and the pump cover, and between the rear end cover and the pump cover.
Preferably, the mechanical seal rotating piece is arranged in the seal cavity.
Preferably, the dynamic ring and the static ring of the mechanical seal are both made of integral cast tungsten carbide hard alloy.
The invention has the beneficial effects that: two pairs of machine seal rotating pieces which are symmetrically arranged are adopted to provide high specific pressure sealing force through a large spring, and the structural mode is favorable for heat exchange and cooling of the end faces of the machine seal under the condition of ensuring reliable sealing; all moving elements of the mechanical seal rotating piece are not in frictional contact with drilling mud except the sealing surface of the moving ring, so that abrasion and corrosion damage are basically avoided, and the sealing service life is prolonged; the rubber corrugated pipe structure not only seals axial leakage, but also has the capability of automatic centering of the movable ring and the jointing compensation of the sealing end face of the movable ring.
Drawings
Fig. 1 is a schematic structural view of a double-end-face mechanical sealing device for a sand pump.
In the figure: 1-shaft sleeve, 2-front end cover, 3-pump cover, 4-liquid inlet hole pipe plug, 5-sealing ring, 6-rear end cover, 7-static ring, 8-dynamic ring, 9-rubber corrugated pipe, 10-dynamic ring seat, 11-push ring, 12-spring, 13-liquid discharging hole pipe plug, 14-anti-rotation pin, 15-O type sealing ring and 16-clamping groove.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the invention discloses a double-end-face mechanical sealing device for a sand pump, which comprises a shaft sleeve 1, a front end cover 2, a pump cover 3, a rear end cover 6, a static ring 7 and a mechanical seal rotating part, wherein:
a front end cover 2 and a rear end cover 6 are respectively arranged on two sides of the pump cover 3;
the upper end and the lower end of the pump cover 3 are respectively provided with a liquid inlet hole pipe plug 4 and a liquid outlet hole pipe plug 13;
a transverse shaft sleeve 1 is arranged between the front end cover 2 and the rear end cover 6, and two ends of the shaft sleeve 1 respectively penetrate out of the front end cover 2 and the rear end cover 6;
two ends of the shaft sleeve 1 are respectively provided with a static ring 7 and a machine seal rotating piece which are symmetrical, and a spring 12 for pressing a left sealing surface and a right sealing surface is arranged between the machine seal rotating pieces at the two ends and is pressed by the spring 12;
the mechanical seal rotating part comprises a moving ring 8, a rubber corrugated pipe 9, a moving ring seat 10 and a push ring 11, wherein the moving ring seat 10 is installed on a shaft sleeve 1, clamping grooves 16 are formed in the front end and the rear end of the moving ring seat 10 respectively, the moving ring 8 is arranged in the clamping groove 16 in the front end of the moving ring seat 10, the front end of the moving ring 8 is connected with the rear end of a static ring 7, the push ring 11 is arranged in the clamping groove 16 in the rear end of the moving ring seat 10, a spring 12 is arranged on the push ring 11, the rubber corrugated pipe 9 is arranged between the moving ring seat 10 and the shaft sleeve 1, the moving ring seat 10 compresses left and right sealing surfaces under the action of the spring 12, and meanwhile, the rubber corrugated pipe 9 is tightly matched with the shaft sleeve 1 to.
Preferably, the front end cover 2 and the rear end cover 6 form a sealed cavity with the pump cover 3.
Preferably, the front end cover 2 and the rear end cover 6 are connected with the front end of the stationary ring 7 through anti-rotation pins 14.
Preferably, an O-ring 15 is disposed between the front end cover 2 and the upper end of the stationary ring 7 and between the rear end cover 6 and the stationary ring.
Preferably, sealing rings 5 are arranged between the front end cover 2 and the pump cover 3, and between the rear end cover 6 and the pump cover 3.
Preferably, the mechanical seal rotating piece is arranged in the seal cavity.
Preferably, the dynamic ring 8 and the static ring 7 of the mechanical seal are both made of integral cast tungsten carbide hard alloy, so that the stability of the sealing surface is ensured.
Claims (7)
1. The utility model provides a sand pump is with two terminal surface mechanical seal device which characterized in that: including axle sleeve (1), front end housing (2), pump cover (3), rear end cap (6), quiet ring (7) and mechanical seal rotating member, wherein:
a front end cover (2) and a rear end cover (6) are respectively arranged on two sides of the pump cover (3);
the upper end and the lower end of the pump cover (3) are respectively provided with a liquid inlet hole pipe plug (4) and a liquid outlet hole pipe plug (13);
a transverse shaft sleeve (1) is arranged between the front end cover (2) and the rear end cover (6), and two ends of the shaft sleeve (1) respectively penetrate out of the front end cover (2) and the rear end cover (6);
two ends of the shaft sleeve (1) are respectively provided with a static ring (7) and a mechanical seal rotating piece which are symmetrical, and a spring (12) for pressing a left sealing surface and a right sealing surface is arranged between the mechanical seal rotating pieces at the two ends and is pressed by the spring (12);
the mechanical seal rotating piece comprises a moving ring (8), a rubber corrugated pipe (9), a moving ring seat (10) and a push ring (11), wherein the moving ring seat (10) is installed on a shaft sleeve (1), clamping grooves (16) are formed in the front end and the rear end of the moving ring seat (10), the moving ring (8) is arranged in the clamping groove (16) in the front end of the moving ring seat (10), the front end of the moving ring (8) is connected with the rear end of a static ring (7), the push ring (11) is arranged in the clamping groove (19) in the rear end of the moving ring seat (10), a spring (12) is arranged on the push ring (11), the rubber corrugated pipe (9) used for providing micro compensation of the moving ring is arranged between the moving ring seat (10) and the shaft sleeve (1), and the rubber corrugated pipe (9) is tightly matched with the shaft sleeve (1).
2. The double-ended mechanical seal device for a sand pump according to claim 1, wherein: the front end cover (2), the rear end cover (6) and the pump cover (3) form a sealed cavity.
3. The double-ended mechanical seal device for a sand pump according to claim 1, wherein: the front end cover (2) and the rear end cover (6) are connected with the front end of the static ring (7) through anti-rotation pins (14).
4. The double-ended mechanical seal device for a sand pump according to claim 1, wherein: o-shaped sealing rings (15) are arranged between the upper ends of the front end cover (2), the rear end cover (6) and the static ring (7).
5. The double-ended mechanical seal device for a sand pump according to claim 1, wherein: and sealing rings (5) are arranged between the front end cover (2) and the pump cover (3) and between the rear end cover (6) and the pump cover (3).
6. The double-ended mechanical seal device for a sand pump according to claim 1 or 2, wherein: the mechanical seal rotating piece is arranged in the seal cavity.
7. The double-ended mechanical seal device for a sand pump according to claim 1, wherein: the dynamic ring (8) and the static ring (7) of the mechanical seal are both made of integral cast tungsten carbide hard alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110218026.3A CN112727800A (en) | 2021-02-26 | 2021-02-26 | Double-end-face mechanical sealing device for sand pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110218026.3A CN112727800A (en) | 2021-02-26 | 2021-02-26 | Double-end-face mechanical sealing device for sand pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112727800A true CN112727800A (en) | 2021-04-30 |
Family
ID=75595561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110218026.3A Pending CN112727800A (en) | 2021-02-26 | 2021-02-26 | Double-end-face mechanical sealing device for sand pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112727800A (en) |
-
2021
- 2021-02-26 CN CN202110218026.3A patent/CN112727800A/en active Pending
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