CN103925232A - Leak-proof double-helix seal device - Google Patents
Leak-proof double-helix seal device Download PDFInfo
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- CN103925232A CN103925232A CN201310635458.XA CN201310635458A CN103925232A CN 103925232 A CN103925232 A CN 103925232A CN 201310635458 A CN201310635458 A CN 201310635458A CN 103925232 A CN103925232 A CN 103925232A
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- Prior art keywords
- stuffing box
- box gland
- spiral groove
- leak
- external spiral
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Abstract
The invention relates to the technical field of mechanical engineering pumps, in particular to a leak-proof double-helix seal device. The leak-proof double-helix seal device is provided with a pump body, a pump shaft and multistage impellers and is characterized in that an inner-thread seal sleeve and an outer-thread seal sleeve sleeve the pump shaft in the medium passage of the high-pressure area and the low-pressure area in the pump body, the inner-thread seal sleeve fixedly sleeve the pump shaft, two ends of the inner-thread seal sleeve are respectively fixedly connected with adjacent multistage impellers, the outer-thread seal sleeve sleeves the inner-thread seal sleeve, the outer-thread seal sleeve is fixed on the pump body through fixing rings at two ends, an outer spiral groove is axially formed in the outer surface of the inner-thread seal sleeve, an inner spiral groove is axially formed in the inner surface of the outer-thread seal sleeve, and the inner spiral groove and the outer spiral groove are identical in size and opposite in spiral directions. The leak-proof double-helix seal device is novel in structure, capable of eliminating pressure difference and preventing leakage, and the like.
Description
Technical field
The present invention relates to mechanical engineering pump technical field, specifically a kind of anti-leak Double-screw sealing device.
Background technique
At present centrifugal lift of pump is required more and more highlyer, what have even reaches km, and adopting in this case single stage centrifugal pump is to reach requirement.Generally select multistage pump, and pressure difference between the adjacent impeller of multistage pump is very large, the medium in pump inner high voltage district can flow to low pressure area, leaks and produce inter-stage, has had a strong impact on the efficiency of pump.
Summary of the invention
The object of the invention is to solve above-mentioned the deficiencies in the prior art, the anti-leak Double-screw sealing device of a kind of novel structure, elimination pressure reduction, Leakage prevention is provided.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of anti-leak Double-screw sealing device, be provided with the pump housing, pump shaft and multi-stage impeller, it is characterized in that being arranged with internal thread stuffing box gland and outside thread stuffing box gland on the pump shaft in the medium channel of zone of high pressure in the pump housing and low pressure area, described internal thread stuffing box gland fixed cover is on pump shaft, two ends are fixedly connected with adjacent multi-stage impeller respectively, internal thread stuffing box gland outer cover has outside thread stuffing box gland, the retaining ring that outside thread stuffing box gland is provided with through two ends is fixed on the pump housing, the outer surface of described internal thread stuffing box gland is axially arranged with external spiral groove, the inner surface axial of outside thread stuffing box gland is provided with inner spiral groove, the size of inner spiral groove and external spiral groove is identical, and rotation direction is contrary, make internal spiral stuffing box gland change the line of production and give birth to and the rightabout sealing pressure head of pressure reduction at the drive backspin of pump, simultaneously, fixing external spiral Sealing produces the rotation contrary with its rotation direction with respect to medium, thereby produce with internal spiral Sealing equidirectional with big or small sealing pressure head, interior, under external spiral Sealing double action, reduce or balance leakage pressure reduction, thereby reduce or stop inter-stage to leak.
The grooved of the transverse section of the inner spiral groove on external spiral groove and external spiral stuffing box gland on internal spiral stuffing box gland of the present invention can be rectangle groove, can be also dovetail groove, can also be vee gutter or curve bath.
The present invention, owing to adopting said structure, has novel structure, eliminates the advantages such as pressure reduction, Leakage prevention.
brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of internal thread stuffing box gland in the present invention.
Fig. 3 is the structural representation of the present invention China and foreign countries thread seal cover.
Fig. 4 is the structural representation with vee gutter internal thread stuffing box gland in the present invention.
Fig. 5 is the structural representation with curve bath internal thread stuffing box gland in the present invention.
Fig. 6 is the structural representation with rectangle groove outside thread stuffing box gland in the present invention.
Fig. 7 is the structural representation with dovetail groove outside thread stuffing box gland in the present invention.
Fig. 8 is the structural representation with vee gutter outside thread stuffing box gland in the present invention.
Fig. 9 is the structural representation with curve bath outside thread stuffing box gland in the present invention.
Reference character: the pump housing 1, pump shaft 2, impeller 3,4, internal thread stuffing box gland 5, outside thread stuffing box gland 6, zone of high pressure 7, low pressure area 8, medium channel 9, rectangle groove 7, dovetail groove 8, vee gutter 9, curve bath 10.
Embodiment:
Below in conjunction with accompanying drawing, the present invention is further described:
As shown in drawings, a kind of anti-leak Double-screw sealing device, be provided with the pump housing 1, pump shaft 2 and multi-stage impeller 3, 4, it is characterized in that being arranged with internal thread stuffing box gland 5 and outside thread stuffing box gland 6 on the pump shaft 2 in the medium channel 9 of zone of high pressure 7 in the pump housing 1 and low pressure area 8, described internal thread stuffing box gland 5 fixed covers are on pump shaft 2, two ends respectively with adjacent multi-stage impeller 3, 4 are fixedly connected with, internal thread stuffing box gland 5 outer cover have outside thread stuffing box gland 6, the retaining ring that outside thread stuffing box gland 6 is provided with through two ends is fixed on the pump housing 1, the outer surface of described internal thread stuffing box gland 5 is axially arranged with external spiral groove, the inner surface axial of outside thread stuffing box gland 6 is provided with inner spiral groove, the size of inner spiral groove and external spiral groove is identical, and rotation direction is contrary, make internal spiral stuffing box gland 5 change the line of production and give birth to and the rightabout sealing pressure head of pressure reduction at the drive backspin of pump, simultaneously, fixing external spiral stuffing box gland 6 produces the rotation contrary with its rotation direction with respect to medium, thereby produce with internal spiral stuffing box gland 5 equidirectional with big or small sealing pressure head, under internal spiral stuffing box gland 5 and external spiral stuffing box gland 6 double actions, reduce or balance leakage pressure reduction, thereby reduce or stop inter-stage to leak.
The grooved of the transverse section of the inner spiral groove on external spiral groove and external spiral stuffing box gland 6 on internal spiral stuffing box gland 5 of the present invention can be rectangle groove 7, can be also dovetail groove 8, can also be vee gutter 9 or curve bath 10.
The present invention in use, the medium of the zone of high pressure in pump can flow to low pressure area, by internal spiral stuffing box gland 5 and external spiral stuffing box gland 6 being set in pump zone of high pressure and low pressure area medium channel, internal spiral stuffing box gland 5 High Rotation Speed under the drive of axle has produced sealing pressure head, by spiral fluted rotation direction is set, or left-handed or dextrorotation, the sealing load that internal spiral stuffing box gland 5 and external spiral stuffing box gland 6 are produced is contrary with pressure reduction, thereby has hindered the leakage of medium.If when the pressure head that spiral chute produces just equals the pressure reduction of zone of high pressure and low pressure area, can prevent that inter-stage from leaking completely.
The present invention, owing to adopting said structure, has novel structure, eliminates the advantages such as pressure reduction, Leakage prevention.
Claims (5)
1. an anti-leak Double-screw sealing device, be provided with the pump housing, pump shaft and multi-stage impeller, it is characterized in that being arranged with internal thread stuffing box gland and outside thread stuffing box gland on the pump shaft in the medium channel of zone of high pressure in the pump housing and low pressure area, described internal thread stuffing box gland fixed cover is on pump shaft, two ends are fixedly connected with adjacent multi-stage impeller respectively, internal thread stuffing box gland outer cover has outside thread stuffing box gland, the retaining ring that outside thread stuffing box gland is provided with through two ends is fixed on the pump housing, the outer surface of described internal thread stuffing box gland is axially arranged with external spiral groove, the inner surface axial of outside thread stuffing box gland is provided with inner spiral groove, the size of inner spiral groove and external spiral groove is identical, and rotation direction is contrary.
2. a kind of anti-leak Double-screw sealing device according to claim 1, is characterized in that the grooved of the transverse section of the external spiral groove on described internal spiral stuffing box gland and the inner spiral groove on external spiral stuffing box gland is respectively rectangle groove.
3. a kind of anti-leak Double-screw sealing device according to claim 1, is characterized in that the grooved of the transverse section of the external spiral groove on described internal spiral stuffing box gland and the inner spiral groove on external spiral stuffing box gland is respectively dovetail groove.
4. a kind of anti-leak Double-screw sealing device according to claim 1, is characterized in that the grooved of the transverse section of the external spiral groove on described internal spiral stuffing box gland and the inner spiral groove on external spiral stuffing box gland is respectively vee gutter.
5. a kind of anti-leak Double-screw sealing device according to claim 1, is characterized in that the grooved of the transverse section of the external spiral groove on described internal spiral stuffing box gland and the inner spiral groove on external spiral stuffing box gland is respectively curve bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310635458.XA CN103925232A (en) | 2013-12-03 | 2013-12-03 | Leak-proof double-helix seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310635458.XA CN103925232A (en) | 2013-12-03 | 2013-12-03 | Leak-proof double-helix seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103925232A true CN103925232A (en) | 2014-07-16 |
Family
ID=51143569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310635458.XA Pending CN103925232A (en) | 2013-12-03 | 2013-12-03 | Leak-proof double-helix seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103925232A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228540A (en) * | 2020-11-04 | 2021-01-15 | 福建中维动力科技股份有限公司 | Lubricating and sealing structure of speed regulation assembly of electric heavy truck |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4047024B2 (en) * | 2002-01-31 | 2008-02-13 | 古河機械金属株式会社 | Pump shaft seal device |
| CN201943992U (en) * | 2010-06-13 | 2011-08-24 | 西安航天泵业有限公司 | Axial force balance device of multistage centrifugal pump |
| CN202326270U (en) * | 2011-11-18 | 2012-07-11 | 浙江科尔泵业股份有限公司 | High-duty high-pressure horizontal split multi-stage centrifugal pump |
| CN202612214U (en) * | 2012-05-08 | 2012-12-19 | 长沙三昌泵业有限公司 | Self-balancing multistage pump |
| CN203570658U (en) * | 2013-12-03 | 2014-04-30 | 山东双轮股份有限公司 | Double helix sealing device capable of preventing leakage |
-
2013
- 2013-12-03 CN CN201310635458.XA patent/CN103925232A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4047024B2 (en) * | 2002-01-31 | 2008-02-13 | 古河機械金属株式会社 | Pump shaft seal device |
| CN201943992U (en) * | 2010-06-13 | 2011-08-24 | 西安航天泵业有限公司 | Axial force balance device of multistage centrifugal pump |
| CN202326270U (en) * | 2011-11-18 | 2012-07-11 | 浙江科尔泵业股份有限公司 | High-duty high-pressure horizontal split multi-stage centrifugal pump |
| CN202612214U (en) * | 2012-05-08 | 2012-12-19 | 长沙三昌泵业有限公司 | Self-balancing multistage pump |
| CN203570658U (en) * | 2013-12-03 | 2014-04-30 | 山东双轮股份有限公司 | Double helix sealing device capable of preventing leakage |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228540A (en) * | 2020-11-04 | 2021-01-15 | 福建中维动力科技股份有限公司 | Lubricating and sealing structure of speed regulation assembly of electric heavy truck |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140716 |