CN202402334U - Negative-pressure shaft seal of slurry pump - Google Patents
Negative-pressure shaft seal of slurry pump Download PDFInfo
- Publication number
- CN202402334U CN202402334U CN2011204923900U CN201120492390U CN202402334U CN 202402334 U CN202402334 U CN 202402334U CN 2011204923900 U CN2011204923900 U CN 2011204923900U CN 201120492390 U CN201120492390 U CN 201120492390U CN 202402334 U CN202402334 U CN 202402334U
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- CN
- China
- Prior art keywords
- pump
- negative pressure
- shaft
- negative
- seal cage
- 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.)
- Expired - Fee Related
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Abstract
The utility model provides a negative-pressure shaft seal of a slurry pump, wherein an inlet and an outlet are arranged on a pump body, a pump shaft is sleeved in a shaft sleeve, and impellers are arranged on the pump shaft; an outer shell of a sealing cavity is arranged at one side of the pump body, the outer end of the outer shell of the sealing cavity is fixed with a packing gland, filler is filled in a space formed by the outer shell of the sealing cavity and the packing gland, a hollow water seal ring is sleeved on the shaft sleeve at the inner side of the filler, and a negative pressure wheel is arranged on the pump shaft at the inner side of the water seal ring; and water channels are formed between a space which is formed between the outer shell of the sealing cavity and the water seal ring and a shaft sleeve gap which extends to the negative pressure wheel. As the negative pressure wheel is arranged on the pump shaft in a sealing shell body of the slurry pump and is communicated with a fresh water source, thereby effectively blocking slurry from moving to a sealing part through fresh water and the negative pressure generated when the negative wheel is in work and overcoming the abrasion of the sealing part and the shaft sleeve, so as to effectively prevent the leakage of the slurry. The negative-pressure shaft seal is particularly suitable for being installed and used in the slurry pump or an impurity pump.
Description
Technical field
The utility model provides mine, down-hole, power plant, coal washing industry, is used to carry the slag stock pump negative pressure axle envelope that contains solid particle medium.
Background technique
Before the utility model proposed, the slag stock pump leaned on asbestos packing or sub-propeller to seal, and asbestos are standstill seals, and sub-propeller is a reduced pressure sealing; But medium is the residual-slurry water that contains solid particle during the work of slag stock pump, Gu in this running, still some remains axial slurries pressure sealing is partly caused wearing and tearing; When may wear to a certain degree, then can produce seepage, cause seal failure; Because the sealed member wearing and tearing are very fast,, not only change trouble so need often sealed member to be changed; And need termination of pumping, and causing loss, occasion that especially can not termination of pumping more is difficult to solve.
Summary of the invention
In order to overcome the shortcoming of existing slag stock pump wearing and tearing seepage, the utility model provides slag stock pump negative pressure axle envelope, and this envelope is through being provided with negative pressure structure on slag stock pump sealed member, and is communicated with the clear water source, solves the dreg slurry technical barrier that axle seals that weares and teares vertically.
The scheme that the utility model technical solution problem is adopted is:
The pump housing is provided with import and outlet, and pump shaft is sleeved in the axle sleeve, and impeller is installed on pump shaft;
The Seal cage shell is installed in the pump housing one side; Seal cage shell outer end is fixed with Gland; In the space that constitutes by Seal cage shell and Gland, be filled with filler, on the axle sleeve of filler inboard, be set with the seal cage of hollow, the negative pressure wheel is installed on the inboard pump shaft of seal cage; Form flow channel between Seal cage shell and seal cage space and axle sleeve gap to the negative pressure wheel.
Good effect; Because the utility model is provided with negative pressure structure at slag stock pump axle envelope position and is communicated with clear water; During work; Axle envelope position can produce controllable negative pressure; Negative pressuren zone is covered by clear water, and like this, dreg slurry gets into the axle envelope never; Guaranteed the long-time running of pump, suited especially on slag stock pump or other transh pump, to install and use.
Description of drawings
Fig. 1 is the utility model negative pressure shaft seal structure figure
Among the figure, the 1. pump housing, 1.1 imports, 1.2. outlet, 1.3. impeller, 1.4. pump shaft, 1.5. axle sleeve, 2. Seal cage shell, 2.1. Gland, 2.2. filler, 2.3. seal cage, 2.4. water filling hole, 2.41. flow channel, 2.5. negative pressure wheel.
Embodiment
Shown in figure, the pump housing 1 is provided with import 1.1 and outlet 1.2, and pump shaft 1.4 is sleeved in the axle sleeve 1.5, and impeller 1.3 is installed on pump shaft;
Working procedure of the utility model and advantage:
Behind slag stock pump electric motor starting, drive the rotation of pump shaft and impeller, impeller rotation import produces negative pressure, and dreg slurry is drawn in the pump housing, receives the impeller action of centrifugal force then, discharges from outlet.When the slag stock pump turned round, filler and negative pressure wheel played the effect of envelope axle, prevent dreg slurry from the axle envelope to external leakage.Because the negative pressure wheel is installed on pump shaft, the negative pressure wheel rotates and can produce controllable negative pressure, can effectively stop the dreg slurry in the pump housing to move toward the axle sleeve direction vertically, thereby reaches envelope axle purpose.Stopped the wearing and tearing of dreg slurry, thereby prolonged the working life of pump, reduced maintenance frequency, the generation of stopping to leak filler.The clear water that injects through water filling hole can cool off axle sleeve, and the negative pressure of the negative pressure wheel generation that can cover.
The accessory lobes wheel shaft envelope slag stock pump of domestic production at present can only be made the one-level pump and use, and can not plural serial stage.Because of the two stage pump inlet pressure greater than the sub-propeller working force, axle envelope lost efficacy, and used so existing slag stock pump can not be made two stage pump.
The negative pressure wheel that the utility model is installed can the multistage pump series operation.
Claims (1)
1. slag stock pump negative pressure axle seals; The pump housing (1) is provided with import (1.1) and outlet (1.2); Pump shaft (1.4) is sleeved in the axle sleeve (1.5), and impeller (1.3) is installed on pump shaft, it is characterized in that: Seal cage shell (2) is installed in the pump housing one side; Seal cage shell outer end is fixed with Gland (2.1); In the space that constitutes by Seal cage shell and Gland, be filled with filler (2.2), on the axle sleeve of filler inboard, be set with the seal cage (2.3) of hollow, on the inboard pump shaft of seal cage, negative pressure wheel (2.5) is installed; Form flow channel (2.41) between Seal cage shell and seal cage space and axle sleeve gap to the negative pressure wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204923900U CN202402334U (en) | 2011-12-01 | 2011-12-01 | Negative-pressure shaft seal of slurry pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204923900U CN202402334U (en) | 2011-12-01 | 2011-12-01 | Negative-pressure shaft seal of slurry pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202402334U true CN202402334U (en) | 2012-08-29 |
Family
ID=46699984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204923900U Expired - Fee Related CN202402334U (en) | 2011-12-01 | 2011-12-01 | Negative-pressure shaft seal of slurry pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202402334U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105637226A (en) * | 2013-06-29 | 2016-06-01 | 尼得科盖普美有限责任公司 | Radial shaft seal |
-
2011
- 2011-12-01 CN CN2011204923900U patent/CN202402334U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105637226A (en) * | 2013-06-29 | 2016-06-01 | 尼得科盖普美有限责任公司 | Radial shaft seal |
| CN105637226B (en) * | 2013-06-29 | 2017-11-21 | 尼得科盖普美有限责任公司 | Radial shaft seal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120829 Termination date: 20121201 |