CN203892239U - Sealing pressure relief structure of high-pressure end of high-pressure two-stage two-end supporting type pump - Google Patents
Sealing pressure relief structure of high-pressure end of high-pressure two-stage two-end supporting type pump Download PDFInfo
- Publication number
- CN203892239U CN203892239U CN201420215413.7U CN201420215413U CN203892239U CN 203892239 U CN203892239 U CN 203892239U CN 201420215413 U CN201420215413 U CN 201420215413U CN 203892239 U CN203892239 U CN 203892239U
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- CN
- China
- Prior art keywords
- pressure
- sealing
- impeller
- pump
- stage
- 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 discloses a sealing pressure relief structure of a high-pressure end of a high-pressure two-stage two-end supporting type pump. A shaft is provided with an impeller and a sealing throttling sleeve; a pump cover is arranged on the outer side of the sealing throttling sleeve in a sleeving mode; a throttling impeller ring is arranged between the pump cover and the impeller; the impeller, the throttling impeller ring, the pump cover and the sealing throttling sleeve form a pressure buffering chamber; the pump cover is provided with a balance hole which is communicated with the pressure buffering chamber. According to the sealing pressure relief structure of the high-pressure end of the high-pressure two-stage two-end supporting type pump, the structure is simple, the pressure before the high-pressure end is sealed can be reduced to the sealing level of a low-pressure end due to the pressure buffering chamber and the balance hole which is connected with the low-pressure area, and accordingly the design and manufacture difficulty of the sealing is reduced and the safety and the reliability of the pump running are ensured.
Description
Technical field
The utility model relates to the field that manufactures and designs of pump, is specifically related to a kind of high pressure two-stage two end supports formula pump high voltage terminal sealing and unloads 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.
Model utility content
The purpose of this utility model is to overcome above-mentioned not enough problem, provides a kind of and reduces 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 utility model 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 utility model 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 utility model.
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 utility model 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 utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; according to the technical solution of the utility model and inventive concept thereof, be equal to replacement or changed, within all should being encompassed in protection domain of the present utility model.
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 |
|---|---|---|---|
| CN201420215413.7U CN203892239U (en) | 2014-04-30 | 2014-04-30 | Sealing pressure relief structure of high-pressure end of high-pressure two-stage two-end supporting type pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420215413.7U CN203892239U (en) | 2014-04-30 | 2014-04-30 | Sealing pressure relief structure of high-pressure end of high-pressure two-stage two-end supporting type pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203892239U true CN203892239U (en) | 2014-10-22 |
Family
ID=51718650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420215413.7U Expired - Fee Related CN203892239U (en) | 2014-04-30 | 2014-04-30 | Sealing pressure relief structure of high-pressure end of high-pressure two-stage two-end supporting type pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203892239U (en) |
-
2014
- 2014-04-30 CN CN201420215413.7U patent/CN203892239U/en not_active Expired - Fee Related
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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: 20141022 Termination date: 20150430 |
|
| EXPY | Termination of patent right or utility model |