CN103953573A - High-pressure end sealing pressure relief structure of high-pressure two-stage two-end supporting type pump - Google Patents
High-pressure end sealing pressure relief structure of high-pressure two-stage two-end supporting type pump Download PDFInfo
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- CN103953573A CN103953573A CN201410177881.4A CN201410177881A CN103953573A CN 103953573 A CN103953573 A CN 103953573A CN 201410177881 A CN201410177881 A CN 201410177881A CN 103953573 A CN103953573 A CN 103953573A
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- China
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- pressure
- sealing
- pump cover
- pump
- impeller
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Abstract
The invention discloses a high-pressure end sealing pressure relief structure of a high-pressure two-stage two-end supporting type pump. An impeller and a sealing throttling sleeve are mounted on a shaft; the outer side of the sealing throttling sleeve is sleeved with a pump cover; a throttling opening ring is mounted between the pump cover and the impeller; the impeller, the throttling opening ring, the pump cover and the sealing throttling sleeve form a pressure buffering cavity; a balance hole communicated with the pressure buffering cavity is formed in the pump cover. The high-pressure end sealing pressure relief structure has the characteristics of simple structure; by the arrangement of the pressure buffering cavity and the formation of the balance hole, the balance hole is connected with a low-pressure region, so that pressure on the high-pressure end before sealing is reduced to the level of low-pressure end sealing; therefore, the difficulty in designing and manufacturing of sealing is reduced, and the safety and the reliability of pump running are guaranteed.
Description
Technical field
The present invention relates to the field that manufactures and designs of pump, be specifically related to a kind of high pressure two-stage two end supports formula pump high voltage terminal sealing and unload laminated structure.
Background technique
In Large Scale Petrochemical Plants, the ratio of high pressure two end supports formula pump (BB2 type) is increasing, because suction pressure is high, lift is high, head pressure is high, conventionally operating temperature is also higher, make this pump all have certain difficulty in design, manufacture, use, in industry, incorporated into the ranks of high-end pump product, both stage impellers BB2 type pump particularly, owing to only having both stage impellers, conventionally at high voltage terminal, be unworthy of balanced controls, the pressure that causes high voltage terminal sealing to be born is very high, has increased design difficulty and the cost of production of sealing.
Summary of the invention
The object of the invention is to overcome above-mentioned not enough problem, provide a kind of and reduce high voltage terminal sealing and bear the high pressure two-stage two end supports formula pump high voltage terminal sealing of pressure and unload laminated structure.
The technological scheme that the present invention adopted is for achieving the above object: laminated structure is unloaded in the sealing of high pressure two-stage two end supports formula pump high voltage terminal, impeller, sealing orifice sleeve are installed on axle, pump cover is sleeved on sealing orifice sleeve outside, throttling choma is installed between pump cover and impeller, described impeller, throttling choma, pump cover, sealing orifice sleeve form a pressure buffer chamber, offer the equalizing orifice communicating with pressure buffer chamber on described pump cover.
Described equalizing orifice is communicated with low pressure area by pipeline.
Described throttling choma one end is fixed on pump cover, and the other end is fixed on impeller.
Feature of the present invention is: simple in structure, by pressure buffer chamber is set, and offer equalizing orifice, equalizing orifice is connected with low pressure area, the level that Pressure Drop before high voltage terminal sealing is sealed to low voltage terminal, thus the Design and manufacture difficulty sealing reduced, guarantee the safety reliability of pump operation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein: 1, impeller 2, throttling choma 3, pump cover 4, pressure buffer chamber 5, sealing orifice sleeve 6, axle 7, equalizing orifice.
Embodiment
As shown in Figure 1, the present invention is that laminated structure is unloaded in the sealing of high pressure two-stage two end supports formula pump high voltage terminal, impeller 1 is installed on axle 6, sealing orifice sleeve 5, pump cover 3 is sleeved on sealing orifice sleeve 5 outsides, between pump cover 3 and impeller 1, throttling choma 2 is installed, described throttling choma 2 one end are fixed on pump cover 3, the other end is fixed on impeller 2, described impeller 1, throttling choma 2, pump cover 3, sealing orifice sleeve 5 forms a pressure buffer chamber 4, on described pump cover 3, offer the equalizing orifice 7 communicating with pressure buffer chamber 4, described equalizing orifice 7 is communicated with low pressure area by pipeline, guide highly pressurised liquid into low voltage terminal, the level that Pressure Drop before high voltage terminal sealing is sealed to low voltage terminal, thereby reduced the Design and manufacture difficulty of sealing, guarantee the safety reliability of pump operation.
The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; according to technological scheme of the present invention and inventive concept thereof, be equal to replacement or changed, within all should being encompassed in protection scope of the present invention.
Claims (3)
1. laminated structure is unloaded in the sealing of high pressure two-stage two end supports formula pump high voltage terminal, it is characterized in that: impeller (1), sealing orifice sleeve (5) are installed on axle (6), pump cover (3) is sleeved on sealing orifice sleeve (5) outside, between pump cover (3) and impeller (1), throttling choma (2) is installed, described impeller (1), throttling choma (2), pump cover (3), sealing orifice sleeve (5) form a pressure buffer chamber (4), on described pump cover (3), offer and pressure buffer chamber 4) equalizing orifice (7) that communicates.
2. laminated structure is unloaded in high pressure two-stage two end supports formula pump high voltage terminal sealing as claimed in claim 1, it is characterized in that: described equalizing orifice (7) is communicated with low pressure area by pipeline.
3. laminated structure is unloaded in high pressure two-stage two end supports formula pump high voltage terminal sealing as claimed in claim 1, it is characterized in that: it is upper that described throttling choma (2) one end is fixed on pump cover (3), and the other end is fixed on impeller (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410177881.4A CN103953573A (en) | 2014-04-30 | 2014-04-30 | High-pressure end sealing pressure relief structure of high-pressure two-stage two-end supporting type pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410177881.4A CN103953573A (en) | 2014-04-30 | 2014-04-30 | High-pressure end sealing pressure relief structure of high-pressure two-stage two-end supporting type pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103953573A true CN103953573A (en) | 2014-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410177881.4A Pending CN103953573A (en) | 2014-04-30 | 2014-04-30 | High-pressure end sealing pressure relief structure of high-pressure two-stage two-end supporting type pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103953573A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488074A (en) * | 2018-05-31 | 2018-09-04 | 合肥华升泵阀股份有限公司 | A kind of high lift two-stage Full-lining oil slurry pump of large high-temperature |
| CN110094353A (en) * | 2018-01-28 | 2019-08-06 | 吴军 | A kind of coal chemical industry pump sealing pressure relief device |
-
2014
- 2014-04-30 CN CN201410177881.4A patent/CN103953573A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094353A (en) * | 2018-01-28 | 2019-08-06 | 吴军 | A kind of coal chemical industry pump sealing pressure relief device |
| CN108488074A (en) * | 2018-05-31 | 2018-09-04 | 合肥华升泵阀股份有限公司 | A kind of high lift two-stage Full-lining oil slurry pump of large high-temperature |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140730 |