CN201650761U - Backflushing type multi-stage canned motor pump used for easily gasified media - Google Patents
Backflushing type multi-stage canned motor pump used for easily gasified media Download PDFInfo
- Publication number
- CN201650761U CN201650761U CN2010201037246U CN201020103724U CN201650761U CN 201650761 U CN201650761 U CN 201650761U CN 2010201037246 U CN2010201037246 U CN 2010201037246U CN 201020103724 U CN201020103724 U CN 201020103724U CN 201650761 U CN201650761 U CN 201650761U
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- bearing body
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Abstract
A backflushing type multi-stage canned motor pump used for easily gasified media comprises a pump body, an absorbing end, a front motor cover, a rear motor cover, a front bearing body and a rear bearing body. The front bearing body and the rear bearing body are supported with a rotating shaft, one end of the rotating shaft is provided with a multi-stage impeller, the multi-stage impeller is located on the inner side of a middle-section casing between the pump body and the absorbing end, a motor stator is arranged between the front motor cover and the rear motor cover, a stator and rotor shielding sleeve clearance is formed between a motor rotor and a motor stator on the rotating shaft, an inner cavity of the pump body is communicated with the rear end of the stator and rotor shielding sleeve clearance, and the front end of the stator and rotor shielding sleeve clearance is communicated with an inner cavity of a last impeller. Compared with the prior art, during working, media flow in a backflushing type large flow manner in the stator and rotor shielding sleeve clearance, thereby preventing the media from gasifying in the stator and rotor shielding sleeve clearance, avoiding cavitation, vibration, noise and the like caused by circulation in the pump, and prolonging service life of the pump.
Description
Technical field
The utility model relates to a kind of pump, and particularly a kind of easy gasifying medium backflushing type multi-stage shield pump is mainly used in the medium vapor pressure and varies with temperature bigger operating mode.
Background technique
General single-stage canned motorpump pump head is an Ordinary Centrifugal Pumps, the shared axle of motor and pump head, and motor stator chamber and rotor chamber are separated with stator can, and the rotor insert is on common shaft, and itself is also coated by housing, to prevent dielectric corrosion.Under the normal condition, medium is boosted via the impeller acting by pump housing inlet, and most of medium is discharged by pump housing exhaust port, and the fraction MEDIA FLOW is taken away the heat that machine operation produces through the rotor chamber.The axle of canned motorpump adopts sliding bearing to support, and sliding bearing adopts materials such as graphite or silicon carbide more.
General multi-stage shield pump structure is similar to the single-stage canned motorpump, and just the multistage pump pump head is made up of a plurality of impellers, stator, middle piece housing.Circular flow is to being to be pressurizeed via impeller by the suction side, and by stator, middle piece housing chamber, last most of medium is discharged through pump housing outlet, and the fraction medium rotor chamber of flowing through from front to back is rotor housing gap, takes away the motor heat.The multi-stage shield pump of this structure, along with variation of temperature, when the increase of medium vapor pressure is bigger, MEDIA FLOW is when the rotor chamber, the motor heat will very easily gasify medium, the medium that has gas circulates in pump and will cause cavitation, vibration, noise etc. to be unfavorable for consequences such as canned motorpump work, may cause sliding bearing pulverizing, burn-down of electric motor etc. when serious.
Summary of the invention
The rate-of flow that the purpose of this utility model provides a kind of rotor chamber of flowing through is big, prevent to produce at this outside that medium gasifies, circulate, improve the easy gasifying medium backflushing type multi-stage shield pump in the working life of pump in the medium pump, overcomes the deficiencies in the prior art.
Easy gasifying medium backflushing type multi-stage shield pump of the present utility model, comprise the pump housing, the suction side, the motor protecgulum, the motor bonnet, the fore bearing body, the rear bearing body, at fore bearing body and rear bearing body upper support rotating shaft is arranged, one end of rotating shaft is equipped with multi-stage impeller, the middle piece housing inboard of multi-stage impeller between the described pump housing and suction side, between motor protecgulum and motor bonnet, motor stator is arranged, form rotor housing gap between rotor in the rotating shaft and the motor stator, the inner chamber of the pump housing is connected with the rear end in rotor housing gap, the front end in rotor housing gap with not the level impeller intracavity inter-connection.
Easy gasifying medium backflushing type multi-stage shield pump of the present utility model, the inner chamber of the wherein said pump housing with the mode of communicating that the rear end in rotor housing gap is connected is: an end of the pump housing and bypass tube joins, and the other end of bypass tube is connected with the rear end in rotor housing gap by through hole on the rear bearing body and rear bearing body flow orifice; The front end in rotor housing gap with the mode of communicating of intracavity inter-connection of level impeller not is: be provided with fore bearing body flow orifice on the fore bearing body, on the pump housing, be provided with pump housing flow orifice, be provided with not level impeller flow orifice in the behind of level impeller not, the front end in rotor housing gap is by fore bearing body flow orifice, pump housing flow orifice, not the level impeller flow orifice and the intracavity inter-connection of level impeller not.
Easy gasifying medium backflushing type multi-stage shield pump of the present utility model, during work, can the medium that certain pressure is arranged in the pump housing be introduced the rear end in rotor housing gap by bypass tube, the rotor housing gap of flowing through forward again enters not level impeller inner chamber, compared with prior art medium forms flowing of the big flow of backflushing type in rotor housing gap, prevented the gasification of medium at this place, avoid phenomenons such as circulation produces in the pump cavitation, vibration, noise, prolonged working life of pump.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Embodiment
As shown in Figure 1: 1 is the pump housing, and 16 is the suction side, between the pump housing 1 and suction side 16, have a plurality of in piece housing 17 fixedly connected as a whole.Opposite side at the pump housing 1 is fixed with fore bearing body 12 and motor protecgulum 11, motor protecgulum 11 and between the motor bonnet 9 of rear end motor stator is arranged.Rear side at motor bonnet 9 has rear bearing body 7, is supported with rotating shaft 10 between fore bearing body 12 and rear bearing body 7.One end of rotating shaft 10 is equipped with a plurality of impellers, and each impeller is arranged in corresponding piece housing 17 inboards, and wherein level impeller 13 is not positioned at the pump housing 1 inner chamber.In rotating shaft 10, rotor is arranged, form rotor housing gap 5 between rotor and the motor stator.The inner chamber of the pump housing 1 is connected with the rear end in rotor housing gap 5, concrete structure is: the pump housing 1 is connected by flange with an end of bypass tube 4, the other end of bypass tube 4 joins by flange and rear bearing body 7, and is connected with the rear end in rotor housing gap 5 by radial direction through hole on the rear bearing body 76 and rear bearing body flow orifice 8.The front end in rotor housing gap 5 with not the level impeller 13 inner chamber 14 be connected, concrete structure is: be provided with fore bearing body flow orifice 15 on fore bearing body 12, on the pump housing 1, be provided with pump housing flow orifice 3, be provided with not level impeller flow orifice 2 in the behind of level impeller 13 not, the front end in rotor housing gap 5 is not by fore bearing body flow orifice 15, pump housing flow orifice 3, level impeller flow orifice 2 is connected with the inner chamber 14 of grade impeller 13 not.
During work, can the medium that certain pressure is arranged in the pump housing 1 be introduced the rear end in rotor housing gap 5 by bypass tube 4, the rotor housing gap 5 of flowing through forward again enters not the inner chamber 14 of level impeller 13, compared with prior art medium forms flowing of the big flow of backflushing type in rotor housing gap 5, has prevented the gasification of medium at this place.
Claims (2)
1. easy gasifying medium backflushing type multi-stage shield pump, comprise the pump housing (1), suction side (16), motor protecgulum (11), motor bonnet (9), fore bearing body (12), rear bearing body (7), at fore bearing body (12) and rear bearing body (7) upper support rotating shaft (10) is arranged, one end of rotating shaft (10) is equipped with multi-stage impeller, multi-stage impeller is arranged in piece housing (17) inboard between the described pump housing (1) and suction side (16), between motor protecgulum (11) and motor bonnet (9), motor stator is arranged, form rotor housing gap (5) between rotor in the rotating shaft (10) and the motor stator, it is characterized in that: the inner chamber of the pump housing (1) is connected with the rear end in rotor housing gap (5), the front end in rotor housing gap (5) with not the level impeller (13) inner chamber (14) be connected.
2. easy gasifying medium backflushing type multi-stage shield pump according to claim 1, it is characterized in that: the inner chamber of the described pump housing (1) with the mode of communicating that the rear end in rotor housing gap (5) is connected is: the pump housing (1) joins with an end of bypass tube (4), and the other end of bypass tube (4) is connected with the rear end in rotor housing gap (5) by through hole (6) on the rear bearing body (7) and rear bearing body flow orifice (8); The front end in rotor housing gap (5) with the mode of communicating that is connected of inner chamber (14) of level impeller (13) not is: be provided with fore bearing body flow orifice (15) on fore bearing body (12), on the pump housing (1), be provided with pump housing flow orifice (3), be provided with not level impeller flow orifice (2) in the behind of level impeller (13) not, the front end in rotor housing gap (5) is not by fore bearing body flow orifice (15), pump housing flow orifice (3), level impeller flow orifice (2) is connected with the inner chamber (14) of grade impeller (13) not.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201037246U CN201650761U (en) | 2010-01-29 | 2010-01-29 | Backflushing type multi-stage canned motor pump used for easily gasified media |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201037246U CN201650761U (en) | 2010-01-29 | 2010-01-29 | Backflushing type multi-stage canned motor pump used for easily gasified media |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201650761U true CN201650761U (en) | 2010-11-24 |
Family
ID=43115995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201037246U Expired - Lifetime CN201650761U (en) | 2010-01-29 | 2010-01-29 | Backflushing type multi-stage canned motor pump used for easily gasified media |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201650761U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727055A (en) * | 2013-12-13 | 2014-04-16 | 山西临龙泵业有限公司 | Single-pole single-suction double-blade high-pressure pump |
| CN103775347A (en) * | 2012-10-22 | 2014-05-07 | 中国核动力研究设计院 | Full-sealed pump having dynamic exhaust function |
| CN106194768A (en) * | 2016-08-31 | 2016-12-07 | 徐州潜龙泵业有限公司 | Cavitation-preventive canned motor pump |
-
2010
- 2010-01-29 CN CN2010201037246U patent/CN201650761U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775347A (en) * | 2012-10-22 | 2014-05-07 | 中国核动力研究设计院 | Full-sealed pump having dynamic exhaust function |
| CN103775347B (en) * | 2012-10-22 | 2016-12-07 | 中国核动力研究设计院 | There is the glandless motor pump of dynamic exhaust function |
| CN103727055A (en) * | 2013-12-13 | 2014-04-16 | 山西临龙泵业有限公司 | Single-pole single-suction double-blade high-pressure pump |
| CN103727055B (en) * | 2013-12-13 | 2016-06-22 | 山西临龙泵业有限公司 | Single-pole single-suction double-blade high-pressure pump |
| CN106194768A (en) * | 2016-08-31 | 2016-12-07 | 徐州潜龙泵业有限公司 | Cavitation-preventive canned motor pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101124 |
|
| CX01 | Expiry of patent term |