CN205478374U - Long and thin type low -speed submerged motor pump - Google Patents

Long and thin type low -speed submerged motor pump Download PDF

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Publication number
CN205478374U
CN205478374U CN201620271497.5U CN201620271497U CN205478374U CN 205478374 U CN205478374 U CN 205478374U CN 201620271497 U CN201620271497 U CN 201620271497U CN 205478374 U CN205478374 U CN 205478374U
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China
Prior art keywords
pump
motor
submersible
impeller
submersible motor
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CN201620271497.5U
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Chinese (zh)
Inventor
胡薇
金雷
宋飞
荚小健
王诚成
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Hefei Hengda Jianghai Pump Co Ltd
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Hefei Hengda Jianghai Pump Co Ltd
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Abstract

The utility model relates to an inside medium is the long and thin type low -speed submerged motor pump that air, rotational speed are less than 600 revolutions per minutes. Including dive motor, pump body two parts, the configuration mode of dive motor and water pump same axis. The pivot runs through bearing, rotor, thrust bearing, impeller in proper order. The dive motor adopts slots per pole per phase q for being less than 2 fractional slot winding electromagnetic design method. Is submerged motor pump stator diffusion angle alpha 5 10 the degree. Dive motor external diameter D0 equals 0.5~0.7 with comparing of submerged motor pump impeller outer diameter dp to improve submerged motor pump's unit efficiency, simultaneously for guaranteeing submerged motor pump machinery group stability, with its draw ratio, promptly dive motor external diameter D0 and the submerged motor pump of adapted high H compare control 0.12~0.18. The utility model discloses compact structure saves raw and other materials, reduces the fault point of unit simultaneously. Dive motor unit 's stability has been strengthened. Submerged motor pump's unit performance has been improved. Reduce the loss of streaming of rivers, improved the performance of unit. Reduce the diameter of pit shaft simultaneously, reduced the work load of civil engineering and installation.

Description

A kind of slender type low speed submersible pump
Technical field
This utility model belongs to submersible pump technical field, and being specifically related to interior media is that air, rotating speed are less than 600 revs/min The design of submersible pump.
Background technology
Submersible pump is all using submersible motor as power source, and wherein interior media is the supporting diving electricity of submersible pump of air Machine mostly designs in the outlet passage being in pumping current.To irrigation and drainage or be typically for pump works, the selection of pumps design parameter Efficiency to be taken into account and two aspects of cavitation.To this, the most more common way is: first select Determine speed V before impeller inlet, then calculate the impeller diameter D of pump, and select the rotating speed of pump by the cavitation permissive condition of pump N, both product nD are not to be exceeded a certain zone of reasonableness.
The design of submersible pump is also such, and linear velocity based on above-mentioned water pump vane periphery must keep a specific constant This design principle, in submersible pump keeps the large-scale development, along with the impeller diameter of water pump is increasing, required diving electricity The rotating speed of machine is more and more lower.By the volume of motor:
Wherein n motor speed;F supply frequency;P motor pole number.
It can thus be appreciated that: motor speed is the lowest, and motor pole number is the most.Simultaneously:
Wherein q--MgO-ZrO_2 brick;Q1Number of stator slots;The m number of phases;P motor pole number.
For adapted submersible motor, in traditional Electromagnetic Design, general employing MgO-ZrO_2 brick q is the whole of integer Number groove winding distribution.It can be seen that number of poles is the most from formula, the number of stator slots that MgO-ZrO_2 brick q is required when being integer Q1The most.Simultaneously in the integer groove winding that MgO-ZrO_2 brick is integer, every the most extremely under groove distribution in magnetic field with Other extremely under distribution identical, therefore at each higher hamonic wave electromotive force to extremely descending winding to produce with algebraic method superposition.May Causing some higher hamonic wave electromotive force greatly to weaken, some is the most not all right, so that the potential waveform of submersible motor is deteriorated, brings latent The problems such as the unit vibration of water power pump, noise.Meanwhile, multi-pole low speed submersible motor can be because of its number of stator slots Q1Increase, Whole stator punching diameter is strengthened accordingly, causes the outward appearance diameter of slow-speed of revolution submersible motor to increase substantially.This diving electricity Machine not only ties up the runner pumping current between its outside and pit shaft in diametric increase, also makes submersible pump bulb ratio (latent Hydroelectric machine outer diameter D0/ electric submersible pump impeller outer diameter DP) well beyond rational design load 0.7, even up to more than 0.9, because of In this design, the stator angle of flare α of water pump guide vane body increases, and adds the divergence loss of submersible pump, reduces the effect of unit Rate.Comparing the diametric increase of submersible pump, its axial size lengthens the overall hydraulic performance to submersible pump and will not make Becoming impact, because it does not block runner, not only will not so increasing the gusset consistent with fluid flow direction on hydraulic part Reduce passages losses, fluid flowing can be made on the contrary more smooth and easy.The diametric(al) of unit strengthens, and corresponding volume, weight also can Strengthen, add the cost of manufacture and workload, increase the workload of supporting civil engineering, transported, lift by crane, pacify Dress has also accordingly increased difficulty.
Summary of the invention
In order to make up the deficiency of prior art, the diameter solving low speed submersible pump adapted submersible motor is excessive, hinders pumping water The problem of stream runner, the increase simultaneously taking account of submersible pump axial length does not interferes with the feature of hydraulic performance, and this practicality is new Type is improved by structure and proposes a kind of slender type low speed submersible pump.
A kind of slender type low speed submersible pump includes submersible motor 1 and immersible pump 2, and the stator casing 8 of submersible motor 1 is with latent The diffuser 13 of water pump 2 by connect end cap 10 connect make submersible motor 1 coaxially connected with immersible pump 2 become an entirety; Submersible motor outer diameter D0Less than impeller outer diameter DP, make submersible motor 1 be axially located the impeller 13 water outlet side pumping of immersible pump 2 In the runner of current;
The armature spindle of submersible motor 1 and the pump shaft of immersible pump 2 are same rotating shaft 5;Outlet is passed through in one end of described rotating shaft 5 Side journal bearing 4 is fixed in submersible motor outgoing line side end cap 3, and the middle part of rotating shaft 5 is solid by connecting side journal bearing 9 Surely it is located on connection end cap 10;The other end of rotating shaft 5 extends outside diffuser 13, outside rotating shaft 5 through connecting end cap 10 Stretching and be provided with impeller 14 on end, the outer cup of impeller 14 is provided with impeller housing 15, is positioned in the rotating shaft 5 of diffuser 13 It is provided with thrust bearing 11;
The bulb ratio of described submersible pump is 0.5~0.7;
The angle of flare α of described diffuser 13 is 5~10 degree;
Described submersible motor outer diameter D0It is 0.12~0.18 with the ratio of the entire length of described submersible pump.
Described submersible motor 1 uses MgO-ZrO_2 brick to be the fractional-slot winding less than 2.
Advantageous Effects of the present utility model is embodied in following aspect:
1, this utility model is in the design of 700ZDB (50kW, 14p, 380V) submersible pump, with traditional design pair Such as table 1 below:
From table 1 it follows that the stator punching external diameter of a kind of slender type low speed submersible pump design decreases 29.2%, so that The bulb ratio of submersible pump drops to rational scope of design 0.6, and the angle of flare of diffuser also drops to 5 ° from 17 °.Join Submersible motor outer diameter D0With the ratio 0.132 of the height H of submersible pump, unit operation is stable, and substantially improves stator Streamline line style, improves the whole efficiency of submersible pump unit.These have obtained good validation the most.
2, this utility model is in the design of 900ZDB (160kW, 18p, 380V) submersible pump, with traditional design Contrast is such as table 2 below:
From table 1 it follows that the stator punching external diameter of a kind of slender type low speed submersible pump design decreases 29.7%, so that The bulb ratio of submersible pump drops to rational scope of design 0.625, and the angle of flare of diffuser also drops to 7 ° from 22 °. The submersible motor outer diameter D of adapted0With the ratio 0.175 of the height H of submersible pump, unit operation is stable, and substantially improves and lead Leaf streamline line style, improves the whole efficiency of submersible pump unit.
3, fractional-slot winding is so that designing the selection of motor time slot number relatively flexibly, can be with less groove number, relatively The stator punching of minor diameter carries out multi-pole, the design of slow-revving motor electromagnetic.Alternative design increases the most accordingly.
4, the diameter of this utility model slender type low speed submersible pump is greatly reduced, and the diameter that can reduce adapted civil engineering is opened The amount of digging, reduces workload.
5, adapted submersible motor uses fractional-slot winding design, and its MgO-ZrO_2 brick is mark, and advantage has: 1. can be with relatively Few groove number obtains the breadth coefficient of suitable multiple-grooved;2. the produced higher hamonic wave electromotive force of magnetic pole and magnetic field non-sine distribution can be weakened; 3. can effectively weaken the amplitude of tooth-harmonic emf, improve the waveform of electromotive force;4. reduce because air-gap permeance change causes The pulsating amplitude of every pole magnetic flux, decreases the pulsation loss of magnetic pole surfaces.5. effectively reduce motor torque ripple, reduce winding Tip lengths.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation;
Fig. 2 is the I partial enlarged drawing of Fig. 1;
Sequence number in upper figure: submersible motor 1, immersible pump 2, outgoing line side end cap 3, outgoing line side journal bearing 4, rotating shaft 5, electricity Machine rotor 6, motor stator 7, stator casing 8, connection side journal bearing 9, connection end cap 10, thrust bearing 11, machinery Sealing 12, diffuser 13, impeller 14, impeller housing 15, pit shaft 16.Submersible motor outer diameter D0, impeller outer diameter DP、 The angle of flare α of diffuser.
Detailed description of the invention
Below in conjunction with the accompanying drawings, by embodiment, the utility model is further described.
Seeing accompanying drawing, a kind of slender type low speed submersible pump, including submersible motor 1, the pump housing 2 two large divisions, the axle of the two It is provided with same rotating shaft 5 to middle part, rotating shaft 5 is installed with rotatable parts, from the beginning of submersible motor 1 end, rotation section In the middle part of part, rotating shaft sequentially passes through outgoing line side journal bearing 4, rotor 6, motor and is connected side journal bearing 9, thrust axis with pump Hold 11, mechanical seal 12, impeller 14.Submersible motor has two radially fulcrums, and one is that outgoing line side journal bearing 4 is fixed In submersible motor outgoing line side end cap 3, another be motor be connected with pump side journal bearing 9 be fixed on connect side end cap 10 In.Between two end cap, i.e. the outer cover of rotor 6 is provided with motor stator 7.Motor stator 7 is fixedly installed on outside stator In shell 8, stator casing 8 two ends are connected side end cap 10 with submersible motor outgoing line side end cap 3, motor with pump respectively and fix connection. Thrust bearing 11 is fixedly installed on diffuser 13 inner chamber.The outside of impeller 14 is provided with impeller housing 15.Impeller 14 is outside Monolateral gap 0.5-1.0mm between diameter and impeller housing 15 inside diameter.Submersible motor is positioned at the impeller 14 of submersible pump In water outlet side pumping water flow passage.Pumping water flow passage between submersible motor outer dia and outside pit shaft 16 is a ring Shape region.
During work, Environmental Water enters from impeller housing 15, after impeller 14 supercharging, by diffuser 13, by diffuser 13 Between outlet hypotenuse 131 and shaft in wall 161, folded acute angle, i.e. the stator angle of flare of 5-10 degree, enter outside submersible motor 1 Pumping water flow passage between portion's diameter and outside pit shaft 16 is an annular region.Because submersible motor 1 uses every extremely every phase Groove number q is the fractional-slot winding design less than 2 so that its outer dia is less, and the diffusion angle α of its diffuser 13 can Control in the range of 5-10 degree.This utility model is by ensureing bulb ratio (the submersible motor outer diameter D of submersible pump0/ submersible pump Impeller outer diameter DP) equal to 0.5-0.7, reach to reduce the purpose of passages losses.By by submersible pump draw ratio (submersible motor Outer diameter D0/ submersible pump height H) equal to 0.12-0.18, reach unit operation safety and stability.

Claims (2)

1. a slender type low speed submersible pump, including submersible motor (1) and immersible pump (2), the stator casing (8) of submersible motor (1) and the diffuser of immersible pump (2) (13) by connect end cap (10) connect make submersible motor (1) coaxially connected with immersible pump (2) become an entirety;Submersible motor outer diameter D0Less than impeller outer diameter DP, make submersible motor (1) be axially located in the runner of impeller (14) water outlet side pumping current of immersible pump (2);It is characterized in that:
The armature spindle of submersible motor (1) and the pump shaft of immersible pump (2) are same rotating shaft (5);One end of described rotating shaft (5) is fixed in submersible motor outgoing line side end cap (3) by outgoing line side journal bearing (4), and the middle part of rotating shaft (5) is fixed in connection end cap (10) by connecting side journal bearing (9);The other end of rotating shaft (5) extends diffuser (13) outward through connecting end cap (10), impeller (14) is installed on the overhanging end of rotating shaft (5), the outer cup of impeller (14) is provided with impeller housing (15), and the rotating shaft (5) being positioned at diffuser (13) is provided with thrust bearing (11);
The bulb ratio of described submersible pump is 0.5~0.7;
The angle of flare α of described diffuser (13) is 5~10 degree;
Described submersible motor outer diameter D0It is 0.12~0.18 with the ratio of the entire length of described submersible pump.
A kind of slender type low speed submersible pump the most according to claim 1, it is characterised in that: described submersible motor (1) uses MgO-ZrO_2 brick to be the fractional-slot winding less than 2.
CN201620271497.5U 2016-03-31 2016-03-31 Long and thin type low -speed submerged motor pump Active CN205478374U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620271497.5U CN205478374U (en) 2016-03-31 2016-03-31 Long and thin type low -speed submerged motor pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620271497.5U CN205478374U (en) 2016-03-31 2016-03-31 Long and thin type low -speed submerged motor pump

Publications (1)

Publication Number Publication Date
CN205478374U true CN205478374U (en) 2016-08-17

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105697391A (en) * 2016-03-31 2016-06-22 合肥恒大江海泵业股份有限公司 Slender low-speed submersible electric pump
CN109474122A (en) * 2018-12-14 2019-03-15 哈尔滨理工大学 A kind of latent liquid type LNG pump low-temperature and high-speed motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105697391A (en) * 2016-03-31 2016-06-22 合肥恒大江海泵业股份有限公司 Slender low-speed submersible electric pump
CN109474122A (en) * 2018-12-14 2019-03-15 哈尔滨理工大学 A kind of latent liquid type LNG pump low-temperature and high-speed motor

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