CN102200138B - Seal special for thick oil pump - Google Patents
Seal special for thick oil pump Download PDFInfo
- Publication number
- CN102200138B CN102200138B CN201110192944A CN201110192944A CN102200138B CN 102200138 B CN102200138 B CN 102200138B CN 201110192944 A CN201110192944 A CN 201110192944A CN 201110192944 A CN201110192944 A CN 201110192944A CN 102200138 B CN102200138 B CN 102200138B
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- Prior art keywords
- ring
- axle sleeve
- rotating ring
- seal
- throw
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Abstract
The invention relates to seal special for a thick oil pump, and belongs to the field of mechanical seal for a pump. The seal comprises a spring seat, a shaft sleeve, a moving ring and a stationary ring; a preloaded spring is embedded among the spring seat, the moving ring and the shaft sleeve; an O-shaped seal ring is arranged between the moving ring and the shaft sleeve; a thrust ring is arranged between the O-shaped seal ring and the preloaded spring; a secondary moving ring is arranged on the shaft sleeve on the other side of the stationary ring; a second O-shaped seal ring is arranged between the secondary moving ring and the shaft sleeve; the other side of the secondary moving ring is provided with a second thrust ring; an annular groove is arranged on the second thrust ring; the secondary moving ring is embedded in the annular groove; the shaft sleeve at the other end of the second thrust ring is provided with a fixed ring; a second preloaded spring assembly is arranged between the second thrust ring and the fixed ring; the fixed ring is fixed on the shaft sleeve; and a secondary sealed chamber is formed between the shaft sleeve and the O-shaped seal ring, the moving ring, the stationary ring, the second moving ring and the second O-shaped seal ring, which are sequentially arranged on the shaft sleeve. By the seal, the sealing effect is improved, and the production cost is reduced.
Description
Technical field
The present invention relates to the special-purpose sealing of a kind of thick oil pump type, belong to the mechanical seal for pump field.
Background technique
The operation of pump is that the driven by motor coupling arrives pump shaft again to bearing housing, and the pump shaft impeller is rotated, and space size variation and centrifugal force that impeller forms are dished out medium, and pump case is the parts of airtight impeller.Pump shaft is rotatable parts, and pump case is a static part, must be gapped between pump shaft and the pump case, otherwise pump shaft can not rotate.The mechanical seal shutoff need be used in this gap, and purpose is to prevent the pumped medium leakage, and the leakage of medium can produce the problem of a lot of aspects, such as, pump pressure is not enough, and the medium of leakage is explosive, severe toxicity, befouling environment or the like.
Mechanical seal be by pair of vertical in the end face of running shaft under the effect of the pressure of the pressure of medium and spring and auxiliary element, keep end face to fit and the device that can prevent dielectric leakage of slide relative.The faying surface of dynamic and static ring is called end face.So-called rotating ring is the parts that rotate with pump shaft, and so-called stationary ring is the parts that do not rotate, and mechanical seal seals in rotation.It is inside seal that stationary ring is loaded on towards the mechanical seal of a side in host work chamber, and stationary ring is loaded on dorsad that the mechanical seal of a side in host work chamber is external seal.
In the existing technology, the space that forms between the space that pump case, rotating ring and stationary ring O RunddichtringO form and rotating ring, O RunddichtringO and stationary ring and the axle sleeve constitutes the primary seal chamber jointly, and effect is the shutoff pumped medium.Also have in the existing technology and adopt double seal, need add the sealing system in addition and be used to provide buffer medium, adopt inside seal and inside seal compound mode.The kind of buffer medium is confirmed according to the kind of pumped medium.
The performance parameter of 80% pumped medium is relatively good, adopts conventional seals, and 20% pumped medium performance parameter is relatively harsher.These parameters are the problems that in design, type selecting, use, must consider.The runnability of thick oil pump is the slow-speed of revolution, and large-diameter, seal face are difficult to form effective liquid film, and the characteristic of medium is a high viscosity, impure.So the viscous crude mechanical seal for pump is a difficult problem in the mechanical seal industry, has proved also in the practical application that plain edition mechanical seal is difficult to reach the job requirement of thick oil pump always.
Summary of the invention
According to above deficiency of the prior art; Technical problem to be solved by this invention is: a kind of special-purpose sealing of thick oil pump type that solves the running sealing problem of thick oil pump is provided; Sealing is provided with the two-stage closed chamber, adopts inside seal and external seal combination, has not only improved sealing effect; Reduce cost of production, and be more suitable for the thick oil pump use.
The technical solution adopted for the present invention to solve the technical problems is:
The special-purpose sealing of thick oil pump type comprises the spring seat and the axle sleeve that are successively set on the pump shaft, and rotating ring fits tightly together with the stationary ring that is arranged on the pump case; Setting-in preloading spring between spring seat, rotating ring and the axle sleeve; The O RunddichtringO is set between rotating ring and the axle sleeve, between this O RunddichtringO and the preloading spring throw-out collar is set, its technological points is: on the opposite side axle sleeve of stationary ring second rotating ring is set; Second rotating ring and shaft room are provided with the 2nd O RunddichtringO; The second rotating ring opposite side is provided with second throw-out collar, on second throw-out collar annular groove is set, and second rotating ring is inlaid in the annular groove; On the axle sleeve of the second throw-out collar the other end retaining ring is set; The second preloading spring assembly is set between second throw-out collar and the retaining ring, and retaining ring is fixed on the axle sleeve, common formation secondary seal chamber between the O RunddichtringO that sets gradually on the axle sleeve, rotating ring, stationary ring, second rotating ring and the 2nd O RunddichtringO and the axle sleeve.
The described second preloading spring assembly is made up of second preloading spring and driving pin; Wherein second throw-out collar and retaining ring are connected by driving pin; And driving pin is uniformly distributed with and is arranged between second throw-out collar and the retaining ring, and second preloading spring is arranged between second throw-out collar and the retaining ring and is sleeved on the axle sleeve.
Described retaining ring is fixed on the axle sleeve through holding down bolt.
Sealing system of the present invention comprises primary seal that dynamic and static ring is formed and the auxiliary seal of being made up of O type circle.Primary seal of the present invention is made up of two end faces, and the rotating ring and second rotating ring are set on the axle sleeve, for public, forms two seal faces in the middle of stationary ring is arranged on, and stationary ring O RunddichtringO is positioned at the stationary ring groove; O RunddichtringO, the 2nd O RunddichtringO and stationary ring O RunddichtringO form the Aided Machine sealing, and auxiliary seal and primary seal form complete mechanical seal.
Rotating ring is by the preloading spring pretension, makes rotating ring applying stationary ring.Second rotating ring is the power that transmits through second preloading spring and second throw-out collar, from the stationary ring of fitting in the other direction, and the rotating ring and second rotating ring preloading spring and second preloading spring while through the both sides stationary ring of fitting the other way around like this.
Described the 2nd O RunddichtringO is positioned at the space that second throw-out collar, axle sleeve and second rotating ring form.
Working principle and process:
Power passes to axle sleeve and spring seat through pump shaft; Preloading spring pretension rotating ring; Make rotating ring applying stationary ring; The space that forms between the space that pump case, rotating ring and stationary ring O RunddichtringO form and rotating ring, O RunddichtringO and stationary ring and the axle sleeve constitutes the primary seal chamber jointly, and effect is the shutoff pumped medium, and sealing is an inside seal.
Power passes to retaining ring, second preloading spring and second throw-out collar through pump shaft; The second preloading spring pretension, second rotating ring; Make the second rotating ring applying stationary ring; Common formation secondary seal chamber between O RunddichtringO, rotating ring, stationary ring, second rotating ring and the 2nd O RunddichtringO and the axle sleeve, the shutoff buffer medium, sealing is external seal.
During running, the rotating ring and second rotating ring are simultaneously from opposite direction applying stationary ring, and O RunddichtringO, rotating ring and stationary ring are that primary seal chamber and secondary seal chamber are public.
Described secondary seal chamber prepackage medium, the medium of primary seal chamber leakage simultaneously replenishes the secondary seal chamber, does not need to add in addition the sealing system and replenishes medium, has automatic supplementary result.The kind of buffer medium is confirmed according to the kind of pumped medium, is techniques well known.
The present invention is middle ring type double seal, and comparing traditional double seal has two characteristics:
(1) need add the sealing system with respect to common double seal, the present invention is a kind of double seal that need not add the sealing system in addition;
(2) adopt inside seal and inside seal combination with respect to common double seal, the present invention adopts inside seal and external seal combination.
The beneficial effect that the present invention had is:
The present invention is a kind of novel seal form, and sealing is provided with the two-stage closed chamber, adopts inside seal and external seal combination, has not only improved sealing effect, has reduced cost of production, and is more suitable for the thick oil pump use.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: 1, spring seat; 2, preloading spring; 3, axle sleeve; 4, throw-out collar; 5, rotating ring; 6, stationary ring; 7, second rotating ring; 8, second throw-out collar; 9, second preloading spring; 10, driving pin; 11, retaining ring; 12, the 2nd O RunddichtringO; 13, stationary ring O RunddichtringO; 14, O RunddichtringO.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are done and to be further described:
As shown in Figure 1: the special-purpose sealing of this thick oil pump type, comprise the spring seat 1 and axle sleeve 3 that are successively set on the pump shaft, rotating ring 5 fits tightly together with the stationary ring 6 that is arranged on the pump case; Setting-in preloading spring 2 between spring seat 1, rotating ring 5 and the axle sleeve 3; Between rotating ring 5 and the axle sleeve 3 O RunddichtringO 14 is set, between this O RunddichtringO 14 and the preloading spring 2 throw-out collar 4 is set, its technological points is: second rotating ring 7 is set on the opposite side axle sleeve 3 of stationary ring 6; 3 on second rotating ring 7 and axle sleeve are provided with the 2nd O RunddichtringO 12; Second rotating ring, 7 opposite sides are provided with on second throw-out collar, 8, the second throw-out collars 8 annular groove are set, and second rotating ring 7 is inlaid in the annular groove; On the axle sleeve 3 of second throw-out collar, 8 the other ends retaining ring 11 is set; The second preloading spring assembly is set between second throw-out collar 8 and the retaining ring 11, and retaining ring 11 is fixed on the axle sleeve 3, common formation secondary seal chamber between the O RunddichtringO 14 that sets gradually on the axle sleeve 3, rotating ring 5, stationary ring 6, second rotating ring 7 and the 2nd O RunddichtringO 12 and the axle sleeve 3.
The described second preloading spring assembly is made up of with driving pin 10 second preloading spring 9; Wherein second throw-out collar 8 is connected by driving pin 10 with retaining ring 11; And driving pin 10 is uniformly distributed with and is arranged between second throw-out collar 8 and the retaining ring 11, and second preloading spring 9 is arranged between second throw-out collar 8 and the retaining ring 11 and is sleeved on the axle sleeve 3.
Described retaining ring 11 is fixed on the axle sleeve 3 through holding down bolt.
Sealing system of the present invention comprises primary seal that dynamic and static ring is formed and the auxiliary seal of being made up of O type circle.Primary seal of the present invention is made up of two end faces, and the rotating ring 5 and second rotating ring 7 are set on the axle sleeve 3, for public, forms two seal faces in the middle of stationary ring 6 is arranged on, and stationary ring O RunddichtringO 13 is positioned at the stationary ring groove; O RunddichtringO 14, the 2nd O RunddichtringO 12 and stationary ring O RunddichtringO 13 form the Aided Machine sealing, and auxiliary seal and primary seal form complete mechanical seal.
Rotating ring 5 is by preloading spring 2 pretensions, makes rotating ring 5 applying stationary rings 6.Second rotating ring 7 is the power that transmits through second preloading spring 9 and second throw-out collar 8, from the stationary ring 6 of fitting in the other direction, and the rotating ring 5 and second rotating ring 7 preloading spring 2 and 9 whiles of second preloading spring through the both sides stationary ring 6 of fitting the other way around like this.
Described the 2nd O RunddichtringO 12 is positioned at the space that second throw-out collar 8, axle sleeve 3 and second rotating ring 7 form.
Working principle and process:
Power passes to axle sleeve 3 and spring seat 1 through pump shaft; Preloading spring 2 pretension rotating rings; Make rotating ring 5 applying stationary rings 6; The space that forms between the space that pump case, rotating ring 5 and stationary ring O RunddichtringO 13 form and rotating ring 5, O RunddichtringO 14 and stationary ring 6 and the axle sleeve 3 constitutes the primary seal chamber jointly, and effect is the shutoff pumped medium, and sealing is an inside seal.
Power passes to retaining ring 11, second preloading spring 9 and second throw-out collar 8 through pump shaft; Second preloading spring, 9 pretensions, second rotating ring 7; Make second rotating ring, 7 applying stationary rings 6; Common formation secondary seal chamber between O RunddichtringO 14, rotating ring 5, stationary ring 6, second rotating ring 7 and the 2nd O RunddichtringO 12 and the axle sleeve 3, the shutoff buffer medium, sealing is external seal.
During running, the rotating ring 5 and second rotating ring 7 are simultaneously from opposite direction applying stationary ring 6, and O RunddichtringO 14, rotating ring 5 and stationary ring 6 are that primary seal chamber and secondary seal chamber are public.
Described secondary seal chamber prepackage medium, the medium of primary seal chamber leakage simultaneously replenishes the secondary seal chamber, does not need to add in addition the sealing system and replenishes medium, has automatic supplementary result.
The present invention is middle ring type double seal, and comparing traditional double seal has two characteristics:
(1) need add the sealing system with respect to common double seal, the present invention is a kind of double seal that need not add the sealing system in addition;
(2) adopt inside seal and inside seal combination with respect to common double seal, the present invention adopts inside seal and external seal combination.
The present invention is a kind of novel seal form, and sealing is provided with the two-stage closed chamber, adopts inside seal and external seal combination, has not only improved sealing effect, has reduced cost of production, and is more suitable for the thick oil pump use.
Claims (2)
1. the special-purpose sealing of thick oil pump type comprises the spring seat and the axle sleeve that are successively set on the pump shaft, and rotating ring fits tightly together with the stationary ring that is arranged on the pump case; Setting-in preloading spring between spring seat, rotating ring and the axle sleeve; The O RunddichtringO is set between rotating ring and the axle sleeve, between this O RunddichtringO and the preloading spring throw-out collar is set, it is characterized in that: on the opposite side axle sleeve of stationary ring second rotating ring is set; Second rotating ring and shaft room are provided with the 2nd O type circle; The second rotating ring opposite side is provided with second throw-out collar, on second throw-out collar annular groove is set, and second rotating ring is inlaid in the annular groove; On the axle sleeve of the second throw-out collar the other end retaining ring is set; The second preloading spring assembly is set between second throw-out collar and the retaining ring, and retaining ring is fixed on the axle sleeve, common formation secondary seal chamber between the O RunddichtringO that sets gradually on the axle sleeve, rotating ring, stationary ring, second rotating ring and the 2nd O RunddichtringO and the axle sleeve;
The described second preloading spring assembly is made up of second preloading spring and driving pin; Wherein second throw-out collar and retaining ring are connected by driving pin; And driving pin is uniformly distributed with and is arranged between second throw-out collar and the retaining ring, and second preloading spring is arranged between second throw-out collar and the retaining ring and is sleeved on the axle sleeve.
2. the special-purpose sealing of thick oil pump type according to claim 1, it is characterized in that: described retaining ring is fixed on the axle sleeve through holding down bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110192944A CN102200138B (en) | 2011-07-11 | 2011-07-11 | Seal special for thick oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110192944A CN102200138B (en) | 2011-07-11 | 2011-07-11 | Seal special for thick oil pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102200138A CN102200138A (en) | 2011-09-28 |
| CN102200138B true CN102200138B (en) | 2012-10-24 |
Family
ID=44661038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110192944A Expired - Fee Related CN102200138B (en) | 2011-07-11 | 2011-07-11 | Seal special for thick oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102200138B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606520A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Mechanical seal for starting water feeding pump |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5630699A (en) * | 1995-08-31 | 1997-05-20 | Durametallic Corporation | Pump box with replaceable erosion protector |
| CN2869403Y (en) * | 2005-08-10 | 2007-02-14 | 杭州南方特种泵业有限公司 | Mechanical sealing for pump |
| CN200985898Y (en) * | 2006-12-04 | 2007-12-05 | 颜铧 | Mechanical sealing device capable of freely scattering in axial direction used for multi-stage pump |
| CN201277197Y (en) * | 2008-09-19 | 2009-07-22 | 张家港华青科技有限公司 | Dual mechanical sealing device in oil-gas mixed transportation pump |
| CN101766966A (en) * | 2009-01-05 | 2010-07-07 | 陈登云 | Side-feeding mixer mechanical seal |
| CN201461375U (en) * | 2009-08-21 | 2010-05-12 | 石家庄强大密封有限公司 | Double-end-surface seal device for pump shafts |
-
2011
- 2011-07-11 CN CN201110192944A patent/CN102200138B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102200138A (en) | 2011-09-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121024 Termination date: 20160711 |
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| CF01 | Termination of patent right due to non-payment of annual fee |