CN102840142B - The multi-stage shield pump that a kind of motor is put - Google Patents
The multi-stage shield pump that a kind of motor is put Download PDFInfo
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- CN102840142B CN102840142B CN201210364998.4A CN201210364998A CN102840142B CN 102840142 B CN102840142 B CN 102840142B CN 201210364998 A CN201210364998 A CN 201210364998A CN 102840142 B CN102840142 B CN 102840142B
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Abstract
The present invention relates to the multi-stage shield pump that a kind of motor is put, motor section is divided the top being arranged on canned motorpump, pumping section divides the bottom being arranged on canned motorpump, is provided with middle connecting section between which.This structural design is very beneficial for the I&M of canned motorpump group; Divide in pumping section and be provided with thrust-bearing between middle connecting section.The high pressure water chamber that lower end surface and the pumping section of this thrust-bearing are divided connects, the low-pressure water chamber that upper-end surface and middle connecting section surround connects, such formation points to the axial hydraulic thrust on canned motorpump top, can the gravity of balance shield pump group axle system, and the load of thrust-bearing is reduced near zero.Rotor and stator are sealed by Rotor can and stator can respectively, between two housings, leave gap.Pass through each bearing, housing gap successively by a small amount of liquid of thrust-bearing, reach the effect of lubricating bearings, cooling motor.Ensure that ne-leakage, fluid conveying smoothly from structure, the running durability of 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, motor put, multi-stage shield pump that axial force is small.This invention can be widely used in the various water-carriage systems in the field such as municipal administration, petrochemical industry.
Background technique
In order to meet the high-lift requirement of water-carriage system, usually adopt multistage centrifugal pump as power equipment.But common multistage centrifugal pump uses packing seal or mechanical seal usually, there is certain leak of liquid, especially when departing from optimum operating condition and running, noise and vibration is large, and the load of bearing operational reliability that is very large, pump is deteriorated.Like this, not only affect work and the living environment of people, also bring certain potential safety hazard.Also adopt canned motorpump as delivery equipment in some occasion.The technology of existing canned motorpump generally needs to arrange special water circulation channel, for cooling motor, lubricating bearings.Some canned motorpump have employed and gets high pressure water from pump discharge pipe, discharge the method for circulating water from axle center hole to suction eye.The shortcoming of this method is axle center hole processing difficulties, and circulating water easily forms the interference to impeller inlet current.Due to the gravity of canned motorpump Axial parts, and act on the effect of the axial hydraulic thrust on impeller, such that bearing load is comparatively large, bearing is easy to wearing and tearing, thus reduces safety in operation and the durability of pump.In recent years, the designing technique development of canned motorpump.As patent of invention ZL200910135730.1 have employed the design concept of double shield water-band, the running noises of unit can be reduced by a relatively large margin, but the structural design more complicated of flow passage components, the flow losses of pump are larger.Generally, current canned motorpump technology need to improve.Especially, when multi-stage shield pump is used in building water supply system or central air-conditioning system, the technology of existing multistage centrifugal pump and canned motorpump is all difficult to satisfy the demands in the stability of the durability of bearing, pump operation.In order to optimize the Hydraulic Design of multi-stage shield pump, improve pump structure, alleviate the axial hydraulic thrust suffered by pump further, need to design a kind of new multistage shield pump structure, the features such as this structure can make canned motorpump have, and dehvery lift is high, the axial load of bearing is low, fluid No leakage, thus effectively meet the requirement of various water-carriage system to electromechanical equipment.
Summary of the invention
The object of the invention is the multi-stage shield pump proposing a kind of motor is put, this structure canned motorpump can be made to have features such as dehvery lift is high, the axial load of bearing is low, ensure to improve bearing durability, thus improve the operational reliability of pump.
Technological scheme of the present invention is as follows:
The multi-stage shield pump that motor is put, containing 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 stator, pump section shell, pump end connecting section, exhalant canal, middle connecting section, thrust disc, 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, chopped-off head spatial guide blade, secondary impeller, secondary spatial stator, the pumping section of exhalant canal and pump section shell composition canned motorpump is divided (pump section).Described rotor, stator, motor section shell and motor shaft composition motor part (motor section).The thrust-bearing of described thrust disc and bearing support composition canned motorpump, it is characterized in that: thrust-bearing is arranged on pump end connecting section, and its lower end surface connects with high pressure water chamber, the low-pressure water chamber that its upper-end surface and middle connecting section surround connects.
Another technical characteristics of the present invention is: described pumping section divides the bottom being positioned at multi-stage shield pump, and described motor part is positioned at the top of multi-stage shield pump, and they are separated by middle connecting section, become element of construction independent of each other.
Technical characteristics of the present invention is also: 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 are connected by the hitch bar be arranged in middle connecting section.
Described rotor is wrapped up completely by Rotor can, and is fixed on motor shaft.Motor stator is wrapped up completely by stator can, and is fixed in motor section shell.Rotor, stator, Rotor can, stator can is all coaxially arranged with motor shaft, and leaves the radial clearance of best 0.15 ~ 0.5mm between Rotor can and stator can.
Described pumping intake piping and pump discharge pipe are positioned on same axis.
The present invention compared with prior art, has the following advantages and technique effect: 1. the below of thrust-bearing is high pressure water chamber, is low-pressure water chamber above it.When pump runs well, the highly pressurised liquid after from the pressurization of canned motorpump afterbody impeller will be full of in high pressure water chamber.This pressure acts directly on the below of thrust disc; And in low-pressure water chamber, only dividing the liquid leaking to middle connecting section from pumping section, its pressure is far below the pressure of liquid in high pressure water chamber.The axis acted on like this on thrust disc is made a concerted effort upward, can offset the overwhelming majority of canned motorpump group (containing motor and pump) axle system gravity, the load of thrust-bearing is reduced greatly.Thus extend the working life of thrust-bearing.2. divide due to pumping section and separated by middle connecting section with motor part, become element of construction independent of each other.Like this, the overall structure of canned motorpump group is very succinct, makes to install, maintenance is all very convenient.3. for 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 are connected by the hitch bar be arranged in middle connecting section.Like this, substantially reduce the installation difficulty of unit, also reduce the processing request of Axial parts.4. pumping intake piping and pump discharge pipe are positioned on same axis.Be suitable for a lot of pipeline arrangement running scene like this.
Accompanying drawing explanation
Fig. 1 is the main sectional view of the multi-stage shield pump that a kind of motor provided by the invention is put.
Fig. 2 is the sectional view of A-A section in Fig. 1.
In figure: 1-pumping intake piping; 2-pump inlet; 3-pump section shell; 4-exhalant canal; 5-pump end connecting section; 6-thrust disc; Connecting section in the middle of 7-; 8-motor section shell; 9-stator; 10-upper end bearing; 11-circulating pipe; 12-circulating water chamber; 13-Rotor can; 14-rotor; 15-motor shaft; Step bearing in 16-; 17-high pressure water chamber; 18-secondary spatial stator; 19-secondary impeller; 20-chopped-off head spatial guide blade; 21-first stage impeller; 22-Pump Suction Nozzle; 23-pump discharge pipe; 24-pump discharge; 25-pump-foot; 26-stator can; 27-auxiliary bearing; 28-pump shaft; 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
As shown in Figure 1-2, Fig. 1 is the main sectional view of the multi-stage shield pump that a kind of motor provided by the invention is put, containing pumping intake piping 1, and pump inlet 2, Pump Suction Nozzle 22, first stage impeller 21, chopped-off head spatial guide blade 20, secondary impeller 19, secondary spatial stator 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 stator 18, high pressure water chamber 17, exhalant canal 4, the pumping section that pump section shell 3 and pump end connecting section 5 form canned motorpump divides i.e. pump section, Pump Suction Nozzle 22 in this pump section, first stage impeller 21, chopped-off head spatial guide blade 20, secondary impeller 19, secondary spatial stator 18 sets gradually from down to up and forms pump section main body, this pump section body top arranges pump end connecting section 5, high pressure water chamber 17 is formed between pump end connecting section 5 secondary spatial stator 18, pump section main body is wrapped in pump section shell 3, and aquaporin-4 is set out between pump section shell 3 and pump section main body, rotor 14, motor shaft 15, stator 9 and motor section shell 8 form motor part and motor section.
Divide in pumping section and be arranged with middle connecting section 7 with motor section, make the element of construction of canned motorpump relatively independent.
Rotor 14 is sealed by Rotor can 13 and is fixed on motor shaft 15; Be furnished with stator 9 at the radial outside of rotor 14, inside it, outside is respectively equipped with stator can 26 and motor section shell 8.Between stator can 26 and Rotor can 13, there is gap runner like this, residing for the bearing of this runner and rotor both sides, space is communicated with, and namely it is communicated with circulating water chamber 12 with low-pressure water chamber 30 indirectly.
Upper end bearing 10 and middle step bearing 16 is provided with vertically in the both sides of rotor 14; Thrust disc 6 and bearing support 29 form the thrust-bearing of canned motorpump, it and auxiliary bearing 27 common support pump shaft 28.Motor shaft 15 is connected by the hitch bar be arranged in middle connecting section 7 with pump shaft 28.
Pumping intake piping 1 and pump discharge pipe 23 are arranged on same axis.Circulating pipe 11 is provided with between circulating water chamber 12 and pumping intake piping 1.
The working procedure of pump is as follows:
From the fluid of pump inlet 2, enter first stage impeller 21 through Pump Suction Nozzle 22, the pressurized rear inflow chopped-off head spatial guide blade 20 of fluid.Afterwards, fluid enters secondary impeller 19 and secondary spatial stator 18, arrives high pressure water chamber 17.Except a small amount of fluid leaks to except middle connecting section 7 by thrust-bearing, most fluid will flow to pump discharge 24 via exhalant canal 4.
Two ends up and down due to canned motorpump thrust-bearing are respectively low-pressure water chamber 30 and high pressure water chamber 17, result in formation of the pressure reduction at thrust disc 6 two ends.Under powerful differential pressure action, in high pressure water chamber 17, a small amount of liquid leaks to low-pressure water chamber 30, plays the effect of lubricating thrust bearing.Because the upper and lower two ends of thrust disc exist very large pressure reduction, the axial force of formation can the gravity of basic neutralisation canned motorpump group axle system, reaches the effect alleviating thrust-bearing load, reduce bearing wear.Liquid in middle connecting section 7 will further along axial flow, successively by middle step bearing 16, gap between rotor housing and stator can, and upper end bearing 10, arrive circulating water chamber 12.This partially liq, in movement process, plays the effect of lubricating bearings on the one hand, has also taken away the heat that when canned motorpump works, motor produces on the one hand.As long as the flow control of this partially liq is suitable, just extraordinary operating conditions can be provided for canned motorpump group.
Liquid in circulating water chamber 12, under the residual pressure effect of fluid, flows to pumping intake piping 1 by circulating pipe 11, comes back to pump inlet 2.
Therefore, the design of this canned motorpump can ensure that no liquid leaks operation completely.
Divide (section) for pumping section, first stage impeller and chopped-off head spatial guide blade form a level unit.Afterwards, each grade of unit comprises an impeller and a spatial guide blade.Each grade of unit is preferably designed to identical structure.According to the operation lift demand of canned motorpump, more level unit can be adopted.
Pump-foot 25 is arranged on 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.
Be arranged with middle connecting section 7 owing to dividing in pumping section with motor section, make the element of construction of canned motorpump relatively independent.And, because motor shaft 15 and pump shaft 28 support by different bearing pack respectively, the installation difficulty of axle system and the requirement on machining accuracy of related components greatly can be reduced.Such structural design is also very favourable for the maintenance of canned motorpump.
Pumping intake piping 1 and pump discharge pipe 23 are arranged on same axis.The pipeline that such layout is suitable for many canned motorpump practice occasions is arranged.
Claims (3)
1. a multi-stage shield pump motor put, containing 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 stator (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 stator (18), exhalant canal (4), the pump section of pump shaft (28) and pump section shell (3) composition canned motorpump, described rotor (14), stator (9), motor section shell (8) and motor shaft (15) composition motor section, the thrust-bearing of described thrust disc (6) and bearing support (29) composition canned motorpump, it is characterized in that: thrust-bearing is arranged on pump end connecting section (5), its lower end surface connects with high pressure water chamber (17), the low-pressure water chamber (30) that its upper-end surface and middle connecting section (7) surround connects,
Described pump section is positioned at the bottom of multi-stage shield pump, and 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;
Described pumping intake piping (1) and pump discharge pipe (23) are positioned on same axis.
2. according to the multi-stage shield pump that motor according to claim 1 is put, it is characterized in that: described motor shaft (15) is supported by upper end bearing (10) and middle step bearing (16), pump shaft (28) is supported by thrust-bearing and auxiliary bearing (27); Motor shaft (15) and pump shaft (28) are connected by the hitch bar be arranged in middle connecting section (7).
3. according to the multi-stage shield pump that motor according to claim 1 is put, it is characterized in that: described rotor (14) is wrapped up completely by Rotor can (13), and be fixed on motor shaft (15); The stator (9) of motor is wrapped up completely by stator can (26), and is fixed in motor section shell (8); Rotor (14), stator (9), Rotor can (13), stator can (26) is all coaxially arranged with motor shaft (15), and leaves the radial clearance of 0.15 ~ 0.5mm between Rotor can (13) and stator can (26).
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 |
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| Publication Number | Publication Date |
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| CN102840142A CN102840142A (en) | 2012-12-26 |
| CN102840142B true 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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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN110230600B (en) * | 2019-07-17 | 2024-06-21 | 上海创科泵业制造有限公司 | Multistage canned motor pump |
| CN110953160A (en) * | 2019-11-28 | 2020-04-03 | 江苏大学 | Impeller built-in high-speed centrifugal pump |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1157542C (en) * | 1999-05-14 | 2004-07-14 | 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 |
| 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 |
| CN101963155B (en) * | 2009-07-24 | 2013-02-20 | 上海新沪电机厂有限公司 | Magnetic shielding circulating electric pump for bathroom system |
| CN101988511B (en) * | 2009-07-30 | 2013-09-11 | 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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