CN102840142A - Multistage shield pump placed on electric motor - Google Patents
Multistage shield pump placed on electric motor Download PDFInfo
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- CN102840142A CN102840142A CN2012103649984A CN201210364998A CN102840142A CN 102840142 A CN102840142 A CN 102840142A CN 2012103649984 A CN2012103649984 A CN 2012103649984A CN 201210364998 A CN201210364998 A CN 201210364998A CN 102840142 A CN102840142 A CN 102840142A
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Abstract
The invention relates to a multistage shield pump placed on an electric motor. A motor part is placed at the upper part of a shield pump, the pump part is arranged at the bottom of the shield pump, and a middle linking section is arranged between the shield pump and the pump part. The structural design is very beneficial to mount and maintain the shield pump unit; a thrust bearing is arranged between the pump part and the middle linking section. The lower end face of the thrust bearing is connected to a high-pressure water cavity of the pump part, and the upper end face is connected with a low-pressure water cavity chamber encircled by the middle linking section, thereby forming an axial water thrust force pointed to the upper part of the shield pump, the gravity of an axial system of the shield pump unit can be balanced, and the load of the thrust bearing is reduced to the vicinity of zero. A rotor and a stator of the electric motor rotor are sealed by a rotor shield sleeve and a stator shield sleeve, and a gap is reserved between two shield sleeves. According to the multistage shield pump, a few amount of liquid of the thrust bearing pass through gaps of every bearing and shield sleeve in sequence, the action of lubricating the bearing and cooling the electric motor is achieved, therefore, the leakage-free and smooth fluid conveying is guaranteed structurally, and the operation durability of the pump is improved.
Description
Technical field
The present invention relates to a kind of canned motorpump, particularly a kind of have on pump machine twin shaft, the motor put, multi-stage shield pump that axial force is small.This invention can be widely used in the various water-carriage systems in fields such as municipal administration, petrochemical industry.
Background technique
In order to satisfy the high-lift requirement of water-carriage system, adopt multistage centrifugal pump usually as power equipment.But common multistage centrifugal pump uses packing seal or mechanical seal usually, has certain leak of liquid, and especially noise and vibration is big when departing from the optimum operating condition operation, and the load of bearing is very big, the operational reliability variation of pump.Like this, not only influence people's work and living environment, also bring certain potential safety hazard.Also adopt canned motorpump as delivery equipment in some occasion.The technology of existing canned motorpump generally need be provided with special water circulation channel, is used for cooling motor, lubricating bearings.Some canned motorpump has adopted from pump discharge pipe and has got high pressure water, discharges the method for circulating water from the axle center hole to suction eye.The shortcoming of this method is a center hole processing difficulties, and circulating water forms the interference to the impeller inlet current easily.Because the shielding pump shaft is the gravity of component, and the effect that acts on the axial hydraulic thrust on the impeller, makes that bearing load is big, bearing is easy to wearing and tearing, thereby reduced the safety in operation and the durability of pump.In recent years, the designing technique of canned motorpump constantly develops.Adopt the design concept of double shield water band like patent of invention ZL200910135730.1, can reduce the running noises of unit by a relatively large margin, but the structural design more complicated of flow passage components, the flow losses of pump are bigger.Generally, present canned motorpump technology is still waiting to improve.Especially when multi-stage shield pump uses in building water supply system or central air-conditioning system, the technology of existing multistage centrifugal pump and canned motorpump all is difficult to satisfy the demands aspect the durability of bearing, pump operation stable.In order to optimize the waterpower design of multi-stage shield pump; Improve pump structure; Further alleviate the suffered axial hydraulic thrust of pump; Need a kind of new multistage shield pump structure of design, this structure can make canned motorpump have that the axial load of dehvery lift height, bearing is low, fluid does not have characteristics such as leakage, thereby effectively satisfies the requirement of various water-carriage systems to electromechanical equipment.
Summary of the invention
The objective of the invention is to propose the multi-stage shield pump put on a kind of motor, this structure can make canned motorpump have characteristics such as the axial load of dehvery lift height, bearing is low, guarantees to improve the bearing durability, thereby improves the operational reliability of pump.
Technological scheme of the present invention is following:
The multi-stage shield pump of putting on a kind of motor contains pumping intake piping, Pump Suction Nozzle, pump inlet, pump discharge, pump discharge pipe, first stage impeller, chopped-off head spatial guide blade; Secondary impeller, secondary spatial guide blade, pump section shell, pump end connecting section, exhalant canal, middle connecting section, thrust disc; The upper end bearing, motor shaft, middle step bearing, high pressure water chamber, low-pressure water chamber, auxiliary bearing, pump shaft; Bearing support, rotor, stator, motor section shell, circulating water chamber, Rotor can, stator can.Described Pump Suction Nozzle, first stage impeller, the chopped-off head spatial guide blade, secondary impeller, secondary spatial guide blade, exhalant canal and pump section shell are formed the pump part (pump section) of canned motorpump.Described rotor, stator, motor section shell and motor shaft are formed motor part (motor section).Described thrust disc and bearing support are formed the thrust-bearing of canned motorpump, and it is characterized in that: thrust-bearing is installed on the pump end connecting section, and its lower end surface and high pressure water chamber join, and the low-pressure water chamber that its upper-end surface and middle connecting section surround joins.
Another technical characteristics of the present invention is: described pump partly is positioned at the bottom of multi-stage shield pump, and described motor partly is positioned at the top of multi-stage shield pump, and they are separated by middle connecting section, becomes element of construction independent of each other.
Technical characteristics of the present invention also is: motor shaft is by upper end bearing and middle-end bearings, and pump shaft is supported by thrust-bearing and auxiliary bearing.Motor shaft and pump shaft connect through the hitch bar in the connecting section in the middle of being arranged on.
Described rotor is wrapped up by Rotor can fully, and is fixed on the motor shaft.Motor stator is wrapped up by stator can fully, and is fixed in the motor section shell.Rotor, stator, Rotor can, stator can all with the motor shaft coaxial arrangement, and leave the radial clearance of best 0.15～0.5mm between Rotor can and the stator can.
Described pumping intake piping and pump discharge pipe are positioned on the same axis.
The present invention compared with prior art has the following advantages and technique effect: 1. the below of thrust-bearing is the high pressure water chamber, and its top is the low-pressure water chamber.When pump runs well, in the high pressure water chamber, will be full of from the highly pressurised liquid after the pressurization of canned motorpump afterbody impeller.This pressure acts directly on the below of thrust disc; And in the low-pressure water chamber, having only the liquid that partly leaks to middle connecting section from pump, its pressure is far below the pressure of liquid in the high pressure water chamber.Act on axially making a concerted effort up on the thrust disc like this, can offset canned motorpump group (containing motor and pump) axle is the overwhelming majority of gravity, makes the load of thrust-bearing reduce greatly.Thereby prolong the working life of thrust-bearing.2. because the pump part is separated by middle connecting section with the motor part, become element of construction independent of each other.Like this, the overall structure of canned motorpump group is very succinct, make to install, maintenance is all very convenient.3. for the canned motorpump group, motor shaft is by upper end bearing and middle-end bearings, and pump shaft is supported by thrust-bearing and auxiliary bearing.They connect through the hitch bar in the connecting section in the middle of being arranged on.Like this, reduced the installation difficulty of unit greatly, also having reduced axle is the processing request of component.4. pumping intake piping and pump discharge pipe are positioned on the same axis.Be suitable for the on-the-spot pipe line arrangement mode of a lot of operations like this.
Description of drawings
Fig. 1 is the main sectional view of the multi-stage shield pump put on a kind of motor provided by the invention.
Fig. 2 is the sectional view of A-A section among Fig. 1.
Among the figure: the 1-pumping intake piping; The 2-pump inlet; 3-pump section shell; The 4-exhalant canal; 5-pump end connecting section; The 6-thrust disc; Connecting section in the middle of the 7-; 8-motor section shell; The 9-stator; 10-upper end bearing; The 11-circulating pipe; 12-circulating water chamber; The 13-Rotor can; The 14-rotor; The 15-motor shaft; Step bearing among the 16-; 17-high pressure water chamber; 18-level spatial guide blade; 19-level impeller; 20-chopped-off head spatial guide blade; The 21-first stage impeller; The 22-Pump Suction Nozzle; The 23-pump discharge pipe; The 24-pump discharge; The 25-pump-foot; The 26-stator can; The 27-auxiliary bearing; The 28-pump shaft; The 29-bearing support; 30-low-pressure water chamber.
Embodiment
Below in conjunction with accompanying drawing principle of the present invention, structure are further described.
Embodiment
Shown in Fig. 1-2, Fig. 1 contains pumping intake piping 1, pump inlet 2, Pump Suction Nozzle 22 for the main sectional view of the multi-stage shield pump put on a kind of motor provided by the invention; First stage impeller 21, chopped-off head spatial guide blade 20, secondary impeller 19, secondary spatial guide blade 18, high pressure water chamber 17; Exhalant canal 4, pump section shell 3, pump end connecting section 5, pump shaft 28, pump discharge pipe 23; Rotor 14, motor shaft 15, stator 9, motor section shell 8.Wherein Pump Suction Nozzle 22, first stage impeller 21, chopped-off head spatial guide blade 20, secondary impeller 19; Secondary spatial guide blade 18, high pressure water chamber 17, exhalant canal 4, pump section shell 3 partly is the pump section with the pump that pump end connecting section 5 is formed canned motorpump; Pump Suction Nozzle 22 in this pump section, first stage impeller 21, chopped-off head spatial guide blade 20; Secondary impeller 19, secondary spatial guide blade 18 set gradually from down to up and form pump section main body, and this pump section main body top is provided with pump end connecting section 5; 18 of 5 level spatial guide blades of pump end connecting section form high pressure water chamber 17, and pump section main body is wrapped in the pump section shell 3, and between pump section shell 3 and pump section main body, sets out water channel 4; Rotor 14, motor shaft 15, it partly is motor section that stator 9 is formed motor with motor section shell 8.
Connecting section 7 in the middle of the pump part is arranged with motor section makes that the element of construction of canned motorpump is relatively independent.
Be provided with upper end bearing 10 and middle step bearing 16 vertically in the both sides of rotor 14; Thrust disc 6 and bearing support 29 are formed the thrust-bearing of canned motorpumps, it and auxiliary bearing 27 together support pump shafts 28.Motor shaft 15 is connected by the hitch bar in the connecting section in the middle of being arranged on 7 with pump shaft 28.
The working procedure of pump is following:
From the fluid of pump inlet 2, get into first stage impeller 21 through Pump Suction Nozzle 22, the pressurized back of fluid flows into chopped-off head spatial guide blade 20.Afterwards, fluid gets into secondary impeller 19 and secondary spatial guide blade 18, arrives high pressure water chamber 17.The connecting section 7, most fluids will flow to pump discharge 24 via exhalant canal 4 in the middle of small volume of fluid leaks to through thrust-bearing.
Because the two ends up and down of canned motorpump thrust-bearing are respectively low-pressure water chamber 30 and high pressure water chamber 17, formed the pressure reduction at thrust disc 6 two ends like this.Under powerful differential pressure action, small amount of liquid leaks to low-pressure water chamber 30 in high pressure water chamber 17, plays the effect of lubricating thrust bearing.Because there is very big pressure reduction in thrust disc up and down two ends, the gravity that the axial force of formation can basic neutralisation canned motorpump group axle system reaches the effect that alleviates thrust-bearing load, reduces bearing wear.Liquid in middle connecting section 7 will be further along axial flow, one by one through the gap between middle step bearing 16, rotor housing and the stator can, and upper end bearing 10, arrive circulating water chamber 12.This partially liq plays the effect of lubricating bearings on the one hand in movement process, the heat that motor produces when also having taken away canned motorpump work on the one hand.As long as the flow control of this partially liq is suitable, just can extraordinary running environment be provided for the canned motorpump group.
Liquid in the circulating water chamber 12 flows to pumping intake piping 1 through circulating pipe 11 under the residual pressure effect of fluid, come back to pump inlet 2.
Therefore, the design of this canned motorpump can guarantee no liquid leakage operation fully.
For pump part (section), first stage impeller and chopped-off head spatial guide blade are formed a level unit.Afterwards, each grade unit all comprises an impeller and a spatial guide blade.Each grade unit preferred design becomes identical structure.According to the operation lift requirement of canned motorpump, can adopt more level unit.
Pump-foot 25 is installed in the bottommost of canned motorpump, on the one hand as hydraulic part, is pump suction chamber; Also be the base of canned motorpump group on the one hand, play the effect of bearing pump group total weight.
Because connecting section 7 in the middle of the pump part is arranged with motor section makes that the element of construction of canned motorpump is relatively independent.And, because motor shaft 15 supports with different bearing pack respectively with pump shaft 28, can reduce the installation difficulty of axle system and the requirement on machining accuracy of related components greatly.Such structural design is also very favourable for the maintenance of canned motorpump.
Claims (5)
1. the multi-stage shield pump of putting on the motor contains pumping intake piping (1), pump inlet (2), Pump Suction Nozzle (22), first stage impeller (21); Chopped-off head spatial guide blade (20), secondary impeller (19), secondary spatial guide blade (18), pump section shell (3), pump end connecting section (5); Exhalant canal (4), pump discharge (24), pump discharge pipe (23), thrust disc (6), middle connecting section (7); Upper end bearing (10), motor shaft (15), middle step bearing (16), high pressure water chamber (17), low-pressure water chamber (30); Auxiliary bearing (27), pump shaft (28), bearing support (29), rotor (14), stator (9); Motor section shell (8), circulating water chamber (12), Rotor can (13), stator can (26), described Pump Suction Nozzle (22); First stage impeller (21), chopped-off head spatial guide blade (20), secondary impeller (19), secondary spatial guide blade (18), exhalant canal (4); Pump shaft (28) and pump section shell (3) are formed the pump section of canned motorpump, described rotor (14), and stator (9), motor section shell (8) and motor shaft (15) are formed motor section; Described thrust disc (6) and bearing support (29) are formed the thrust-bearing of canned motorpump, and it is characterized in that: thrust-bearing is installed on the pump end connecting section (5), and its lower end surface and high pressure water chamber (17) join, and the low-pressure water chamber (30) that its upper-end surface and middle connecting section (7) surround joins.
2. according to the multi-stage shield pump of putting on the described motor of claim 1; It is characterized in that: described pump section is positioned at the bottom of multi-stage shield pump; Described motor section is positioned at the top of multi-stage shield pump, and they are separated by middle connecting section (7), become element of construction independent of each other.
3. according to the multi-stage shield pump of putting on claim 1 or the 2 described motors, it is characterized in that: described motor shaft (15) is supported by upper end bearing (10) and middle step bearing (16), and pump shaft (28) is supported by thrust-bearing and auxiliary bearing (27); Motor shaft (15) and pump shaft (28) connect through the hitch bar in the connecting section (7) in the middle of being arranged on.
4. according to the multi-stage shield pump of putting on claim 1 or the 2 described motors, it is characterized in that: described rotor (14) is wrapped up by Rotor can (13) fully, and is fixed on the motor shaft (15); The stator of motor (9) is wrapped up by stator can (26) fully, and is fixed in the motor section shell (8); Rotor (14), stator (9), Rotor can (13), stator can (26) all with motor shaft (15) coaxial arrangement, and leave the radial clearance of 0.15～0.5mm between Rotor can (13) and the stator can (26).
5. according to the multi-stage shield pump of putting on the described motor of claim 1, it is characterized in that: described pumping intake piping (1) is positioned on the same axis with pump discharge pipe (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210364998.4A CN102840142B (en) | 2012-09-26 | 2012-09-26 | The multi-stage shield pump that a kind of motor is put |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210364998.4A CN102840142B (en) | 2012-09-26 | 2012-09-26 | The multi-stage shield pump that a kind of motor is put |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102840142A true CN102840142A (en) | 2012-12-26 |
| CN102840142B CN102840142B (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210364998.4A Active CN102840142B (en) | 2012-09-26 | 2012-09-26 | The multi-stage shield pump that a kind of motor is put |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246559A (en) * | 2016-07-27 | 2016-12-21 | 上海创科泵业制造有限公司 | A kind of Double pump body double-suction type canned motor pump |
| CN108457894A (en) * | 2017-06-02 | 2018-08-28 | 沈阳耐蚀合金泵股份有限公司 | Efficient non-leakage canned motor pump |
| CN108730195A (en) * | 2018-06-07 | 2018-11-02 | 浙江华泰电子有限公司 | Wind-force generating converter Special punching welds multi-stage shield pump |
| CN110030193A (en) * | 2019-05-16 | 2019-07-19 | 上海创科泵业制造有限公司 | Multi-stage shield pump and the water-carriage system for applying it |
| CN110230600A (en) * | 2019-07-17 | 2019-09-13 | 上海创科泵业制造有限公司 | Multi-stage shield pump |
| CN112460031A (en) * | 2019-11-28 | 2021-03-09 | 江苏大学 | Impeller built-in high-speed centrifugal pump |
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| CN1274049A (en) * | 1999-05-14 | 2000-11-22 | 李世堃 | Magnetic suspension pump without shaft seal |
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| CN2781036Y (en) * | 2005-04-29 | 2006-05-17 | 上海奥一泵业制造有限公司 | Easy dismounted canned motor multi-stage centrifugal pump |
| CN2793376Y (en) * | 2005-05-20 | 2006-07-05 | 上海奥一泵业制造有限公司 | Vertical shielded multi-stage pipeline pump |
| CN101963155A (en) * | 2009-07-24 | 2011-02-02 | 上海新沪电机厂有限公司 | Magnetic shielding circulating electric pump for bathroom system |
| CN101988511A (en) * | 2009-07-30 | 2011-03-23 | 上海新沪电机厂有限公司 | Pipeline shielding structural electric pump working in manner of internal circulation |
| CN202914322U (en) * | 2012-09-26 | 2013-05-01 | 上海创科泵业制造有限公司 | Multi-stage canned pump with motor arranged on upper portion |
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2012
- 2012-09-26 CN CN201210364998.4A patent/CN102840142B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1274049A (en) * | 1999-05-14 | 2000-11-22 | 李世堃 | Magnetic suspension pump without shaft seal |
| DE10230025A1 (en) * | 2002-07-04 | 2004-02-12 | Hermetic-Pumpen Gmbh | pumping |
| CN2781036Y (en) * | 2005-04-29 | 2006-05-17 | 上海奥一泵业制造有限公司 | Easy dismounted canned motor multi-stage centrifugal pump |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246559A (en) * | 2016-07-27 | 2016-12-21 | 上海创科泵业制造有限公司 | A kind of Double pump body double-suction type canned motor pump |
| CN106246559B (en) * | 2016-07-27 | 2019-09-20 | 上海创科泵业制造有限公司 | A kind of Double pump body double-suction type canned motor pump |
| CN108457894A (en) * | 2017-06-02 | 2018-08-28 | 沈阳耐蚀合金泵股份有限公司 | Efficient non-leakage canned motor pump |
| CN108730195A (en) * | 2018-06-07 | 2018-11-02 | 浙江华泰电子有限公司 | Wind-force generating converter Special punching welds multi-stage shield pump |
| CN108730195B (en) * | 2018-06-07 | 2024-06-04 | 浙江华泰电子有限公司 | Special impact welding multistage shielding pump for wind power generation converter |
| CN110030193A (en) * | 2019-05-16 | 2019-07-19 | 上海创科泵业制造有限公司 | Multi-stage shield pump and the water-carriage system for applying it |
| CN110230600A (en) * | 2019-07-17 | 2019-09-13 | 上海创科泵业制造有限公司 | Multi-stage shield pump |
| CN110230600B (en) * | 2019-07-17 | 2024-06-21 | 上海创科泵业制造有限公司 | Multistage canned motor pump |
| CN112460031A (en) * | 2019-11-28 | 2021-03-09 | 江苏大学 | Impeller built-in high-speed centrifugal pump |
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| CN102840142B (en) | 2015-08-12 |
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