CN202732446U - Novel centrifugal pump packing seal structure - Google Patents
Novel centrifugal pump packing seal structure Download PDFInfo
- Publication number
- CN202732446U CN202732446U CN 201220116311 CN201220116311U CN202732446U CN 202732446 U CN202732446 U CN 202732446U CN 201220116311 CN201220116311 CN 201220116311 CN 201220116311 U CN201220116311 U CN 201220116311U CN 202732446 U CN202732446 U CN 202732446U
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- China
- Prior art keywords
- shaft seal
- centrifugal pump
- seal cavity
- shaft
- cavity cover
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- Expired - Fee Related
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Abstract
The utility model relates to the technical field of centrifugal pump components, in particular to a novel centrifugal pump packing seal structure. The novel centrifugal pump packing seal structure structurally comprises a shaft seal box, a shaft seal cavity sleeve, packing, a seal ring, a pressing cover, a shaft seal cavity sleeve bolt and adjusting nuts. The shaft seal cavity sleeve is arranged between the shaft seal box and the packing. A certain telescopic gap is arranged between the shaft seal cavity sleeve and the end face of the bottom end of the shaft seal box. The novel centrifugal pump packing seal structure is novel in structure, even in pressing force, regular and uniform in pressure, small and even in abrasion of the shaft sleeve, can improve operation efficiency of the water pump, and is widely applied to the manufacturing field of the centrifugal pumps.
Description
Technical field
The utility model relates to centrifugal pump component technology field, and particularly a kind of centrifugal pump packing seal structure can be widely used in centrifugal pump and make the field.
Background technique
Packing seal is to stop a kind of seal form of leaking with filler filling leakage way.Be characterized in simple in structure, easy for assembly, disassembly and maintenance, with low cost and be widely used on the centrifugal pump.Packing seal on centrifugal pump is motive sealing, is again static seal, and used filler is the soft packing of oil immersion asbestos packing.
The deficiency of conventional filler sealing have following some:
1, pretightening force is constant.Pretightening force is constant, and namely sealing force is constant, and the pressure of sealed medium is the fluctuation variation, and this just may occur, and stuffing box packing excessively seals or sealing is not enough.
2, axle or axle sleeve serious wear.When sealing force was not enough, the method for taking strengthened pretightening force often, makes like this pretightening force excessive, caused the frictional force between stuffing box packing and the axle surface of contact to strengthen, and caused filler to axle or axle sleeve serious wear, and power loss increases, and the mechanical efficiency of pump reduces.
3, the repair cycle is short.Because filler to axle or axle sleeve serious wear, runs well for making pump, shuts down the number of times of changing filler and just increases, operating cost has just improved like this.
The model utility content
The utility model provides a kind of New Centrifugal Pump packing seal structure for the deficiencies in the prior art, and its structure forms and comprises shaft seal case, shaft seal cavity cover, filler, seal ring, gland, spring, shaft seal cavity cover bolt and adjusting nut.The utility model novel structure, impacting force is even and consistent with pressure law, and the axle sleeve wearing and tearing are little and even, can improve water pump efficiency.
For realizing above technical purpose, the utility model will be taked following technological scheme:
A kind of New Centrifugal Pump packing seal structure, its structure form and comprise shaft seal case, shaft seal cavity cover, filler, seal ring, gland, spring, shaft seal cavity cover bolt and adjusting nut.
Further, described shaft seal cavity is placed between shaft seal case and the filler, leaves certain flexible gap between shaft seal cavity cover and the shaft seal case bottom end face.
Further, described seal ring places shaft seal case, shaft seal cavity cover and gland three's junction plane place.
Further, described shaft seal cavity cover bolt connects shaft seal cavity cover and gland, and spring is installed on it.
According to above technological scheme, can realize following beneficial effect:
1, axle sleeve pressure-bearing surface pressurized is even, and the axle sleeve wearing and tearing are little and even.
2, can be automatically change sealing force according to the variation of sealed medium pressure.
3, belong to the unit loading type structure, installation and maintenance are all very convenient.
Description of drawings
Fig. 1 is a kind of New Centrifugal Pump packing seal structure overall schematic;
Label is explained among Fig. 1: 1, axle, 2, the shaft seal case, 3, the shaft seal cavity cover, 4, filler, 5, seal ring, 6, gland, 7, spring, 8, shaft seal cavity cover bolt, 9, adjusting nut.
Embodiment
Be described in further detail below in conjunction with the enforcement of accompanying drawing to technological scheme: as shown in Figure 1, a kind of New Centrifugal Pump packing seal structure described in the utility model, its structure form and comprise shaft seal case 2, shaft seal cavity cover 3, filler 4, seal ring 5, gland 6, spring 7, shaft seal cavity cover bolt 8 and adjusting nut 9.
When seal operation, at first give 4 one pretightening forces of filler by shaft seal cavity cover bolt 8, this power oppositely is applied on the filler 4 by shaft seal cavity cover 3, filler 4 is just in time successively decreased by the inner of Seal cage outward gradually because of the radial force that distortion produces, at this moment, in fact the radial pressure of 4 pairs of axles of filler, 1 surface generation is axially just consistent with the pressure medium distribution trend, and this is just from having realized in essence strengthening the requirement of sealing force.In addition, because the connecting bolt at shaft seal cavity cover 3 has added spring 7, this just can realize that filler can change with the variation of sealed medium pressure the sealing force of axle 1, has safeguarded the elasticity of filler 4, thereby makes filler 4 have good sealability and long working life.
In addition, shaft seal case 2 and shaft seal cavity overlap a flexible gap between the 3 bottom end faces, and this flexible gap also has the effect in labyrinth and plays the effect of even distribution medium pressure except satisfying filler 4 flexible.Like this, when medium arrives filler 4 place through the labyrinth, its pressure and flow all reduce greatly, do not need that filler 4 is applied too large power and just can realize sealing, the shortcoming that occurs in the structure deficiency that conventional filler 4 sealings come out and the use has obtained overcoming, because it belongs to the unit loading type structure, installation and maintenance are all very convenient.
The undeclared part that relates in the utility model is same as the prior art.
Claims (3)
1. a New Centrifugal Pump packing seal structure is characterized in that composition comprises: shaft seal case, shaft seal cavity cover, filler, seal ring, gland, spring, shaft seal cavity cover bolt and adjusting nut; Described shaft seal cavity is placed between shaft seal case and the filler, leaves certain flexible gap between shaft seal cavity cover and the shaft seal case bottom end face.
2. described a kind of New Centrifugal Pump packing seal structure according to claim 1, it is characterized in that: described seal ring places shaft seal case, shaft seal cavity cover and gland three's junction plane place.
3. described a kind of New Centrifugal Pump packing seal structure according to claim 1, it is characterized in that: described shaft seal cavity cover bolt connects shaft seal cavity cover and gland, and spring is installed on it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220116311 CN202732446U (en) | 2012-03-26 | 2012-03-26 | Novel centrifugal pump packing seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220116311 CN202732446U (en) | 2012-03-26 | 2012-03-26 | Novel centrifugal pump packing seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202732446U true CN202732446U (en) | 2013-02-13 |
Family
ID=47658150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220116311 Expired - Fee Related CN202732446U (en) | 2012-03-26 | 2012-03-26 | Novel centrifugal pump packing seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202732446U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735798A (en) * | 2019-12-03 | 2020-01-31 | 新沂市利源机械有限公司 | sealed leakproof horizontal centrifugal sand pump |
-
2012
- 2012-03-26 CN CN 201220116311 patent/CN202732446U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735798A (en) * | 2019-12-03 | 2020-01-31 | 新沂市利源机械有限公司 | sealed leakproof horizontal centrifugal sand pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130213 Termination date: 20150326 |
|
| EXPY | Termination of patent right or utility model |