CN214755934U

CN214755934U - Centrifugal pump driven by squirrel-cage surface-mounted self-starting permanent magnet synchronous motor

Info

Publication number: CN214755934U
Application number: CN202120232824.7U
Authority: CN
Inventors: 黄诚; 周磊
Original assignee: Huanyi Electromagnetic Technology Yichang Co ltd
Current assignee: Huanyi Electromagnetic Technology Yichang Co ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-11-16
Anticipated expiration: 2031-01-26

Abstract

The utility model discloses a centrifugal pump driven by a squirrel-cage surface-mounted self-starting permanent magnet synchronous motor, which comprises a motor and a pump body, wherein the motor is connected with the pump body through an integrated driving shaft; the motor is provided with a support frame, and the support frame is fixed above the pump body; the pump body is internally provided with an impeller, a cover body and a pressing plate, the cover body is arranged above the impeller, the pressing plate is arranged above the cover body and is fixedly connected with the supporting frame, and the driving shaft penetrates through the centers of the cover body and the pressing plate and is connected with the impeller; and a sealing element is arranged at the position of the driving shaft above the impeller, and a water retaining ring is arranged above the sealing element. The utility model discloses pass through the drive shaft integral type with the motor and be connected with the pump body, the motor setting is little in pump body top and occupation space, and the motor effect is good, rotates through the impeller in the drive shaft drive pump body to provide more stable motor drive function for the centrifugal pump.

Description

Centrifugal pump driven by squirrel-cage surface-mounted self-starting permanent magnet synchronous motor

Technical Field

The utility model relates to a centrifugal pump device, concretely relates to squirrel cage table pastes formula self-starting PMSM driven centrifugal pump.

Background

The centrifugal pump has the widest application range in various pumps, the overall efficiency of the common centrifugal pump is only 50% -60%, the running efficiency of the centrifugal pump in China is averagely 10% -30% lower than that of the centrifugal pump in China, and the electricity-saving potential is about 300-400 hundred million kilowatt hours, so that the improvement of the performance and the efficiency of the pump is very important. Therefore, research work in the aspect is urgently needed to be carried out, the existing direct-drive technology is fully utilized, a new centrifugal pump directly driven by the permanent magnet synchronous motor is researched, the efficiency of the pump is further improved, and the cost performance of the centrifugal pump is integrally improved.

Most of the existing centrifugal pumps are motors which drive impellers through couplings or belts, and have the defects of complex structure, inconvenient maintenance, low transmission efficiency, high energy consumption and the like. China specially adapted for 2017, 9, 12 and publication No. CN107152405A discloses a centrifugal pump directly driven by a frameless permanent magnet synchronous motor, which comprises a pump body, wherein an impeller chamber is formed in an inner cavity of the pump body, an exhaust valve is arranged at a water inlet of the pump body, and an integrated seat is fixedly arranged above the pump body; a circulating water chamber and a bearing chamber are formed in the inner cavity of the connected seat, a cooling water pipe is arranged on the outer circumference of the connected seat, a frameless permanent magnet synchronous motor is arranged above the connected seat, and a dustproof cover plate is arranged at the upper part of the frameless permanent magnet synchronous motor; the middle parts of the pump body and the coupling seat are provided with power shafts, a pump cover is arranged between the pump body and the coupling seat, and the power shafts are fixed on the coupling seat through bearings; the top end of the power shaft is provided with an encoder; an impeller is arranged in the impeller chamber and is fixed on the power shaft through an impeller nut; mechanical seals are arranged among the impeller chamber, the circulating water chamber and the bearing chamber. This patent application has reduced the driving chain through frameless formula PMSM rotor direct drive power shaft and impeller rotation, but motor work efficiency remains to be improved.

The permanent magnet synchronous motor has the advantages of simple structure, small size, light weight, small loss, high efficiency, high power factor and the like, is mainly used for replacing motors of high-performance servo transmission systems and direct current motors which require quick response, wide speed regulation range and accurate positioning, and is widely applied to the permanent magnet synchronous motor in order to save energy, reduce emission and improve the energy efficiency of the motor at present because the efficiency of the permanent magnet synchronous motor is higher than that of other types of motors. Therefore, it is necessary to design a new centrifugal pump driven by a self-starting permanent magnet synchronous motor to solve the above-mentioned deficiencies in the prior art.

Disclosure of Invention

Problem to prior art existence, the utility model provides a squirrel cage table pastes formula self-starting PMSM driven centrifugal pump through squirrel cage table pastes formula self-starting PMSM drive centrifugal pump, improves work efficiency.

The utility model discloses a realize through following technical scheme:

the squirrel-cage surface-mounted self-starting permanent magnet synchronous motor driven centrifugal pump comprises a motor and a pump body, wherein the motor is connected with the pump body through an integrated driving shaft; the motor is provided with a support frame, and the support frame is fixed above the pump body; the pump body is internally provided with an impeller, a cover body and a pressing plate, the cover body is arranged above the impeller, the pressing plate is arranged above the cover body and is fixedly connected with the supporting frame, and the driving shaft penetrates through the centers of the cover body and the pressing plate and is connected with the impeller; a sealing element is arranged at the position of the driving shaft above the impeller, and a water retaining ring is arranged above the sealing element; the motor is a squirrel-cage surface-mounted self-starting permanent magnet synchronous motor and comprises a rotor core, a squirrel cage is arranged on the outer side of the rotor core, magnetic shoes are fixed on the outer side of the squirrel cage, and magnetic shoe hoops are fixed on the outer side of the magnetic shoes.

Among the above-mentioned technical scheme, the motor passes through the drive shaft integral type with the pump body and is connected, and the motor setting is little in pump body top and occupation space, and the motor effect is good, through the impeller rotation in the drive shaft drive pump body to provide more stable motor drive function for the centrifugal pump. After the magnetic shoe is fixed on the outer side of the squirrel cage in the modes of gluing and the like, the magnetic shoe is fixed through the magnetic shoe hoop, the magnetic shoe is prevented from falling off, and the working performance of the motor is improved.

As a further technical solution, the lower end of the driving shaft passes through the center of the impeller and is fixed on the lower end surface of the impeller by bolts.

As a further technical scheme, the motor is fixed in the support frame, bearings are arranged at the top and the bottom of the support frame, and the bearings are connected with the driving shaft.

As a further technical scheme, the supporting frame is fixedly connected with the pressing plate through bolts.

As a further technical scheme, the water retaining ring is fixed on the driving shaft and is positioned in the cover body.

As a further technical solution, the sealing member is disposed around the drive shaft; one end of the sealing element is connected with the impeller, and the other end of the sealing element penetrates into the cover body.

As a further technical scheme, the positions of a water inlet and a water outlet of the centrifugal pump are mutually vertical.

As a further technical scheme, the squirrel cage is provided with a plurality of squirrel cage guide rails along the circumferential direction, an accommodating groove is formed between every two adjacent squirrel cage guide rails, and a magnetic tile is placed in the accommodating groove.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model discloses a motor passes through the drive shaft integral type with the pump body and is connected, and the motor setting is little in pump body top and occupation space, and the motor effect is good, through the impeller rotation in the drive shaft drive pump body to provide more stable motor drive function for the centrifugal pump. And simultaneously, the utility model discloses be fixed in the squirrel cage outside back through modes such as sticky with the magnetic shoe, rethread magnetic shoe staple bolt is fixed the magnetic shoe, avoids the magnetic shoe to drop, improves the working property of motor.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a centrifugal pump driven by a squirrel-cage surface-mounted self-starting permanent magnet synchronous motor according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a squirrel cage surface-mounted self-starting permanent magnet synchronous motor according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a rotor of the squirrel-cage surface-mount self-starting permanent magnet synchronous motor according to the embodiment of the present invention;

in the figure: 1. a motor; 101. a housing; 102. an end cap; 103. a stator winding; 104. a magnetic shoe; 105. a stator core; 106. a bearing; 107. a mouse cage; 108. a rotor core; 109. a magnetic shoe hoop; 2. a pump body; 3. a drive shaft; 4. a support frame; 5. pressing a plate; 6. a cover body; 7. an impeller; 8. a seal member; 9. a water retaining ring.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1, the utility model provides a centrifugal pump driven by a squirrel-cage surface-mounted self-starting permanent magnet synchronous motor, which comprises a motor 1 and a pump body 2, wherein the motor 1 is connected with the pump body 2 through an integrated driving shaft 3; the motor 1 is arranged above the pump body 2, and drives the impeller 7 in the pump body 2 to rotate through the driving shaft 3, so that a more stable motor driving function is provided for the centrifugal pump.

An impeller 7, a cover body 6 and a pressing plate 5 are arranged in the pump body 2, the cover body 6 is arranged above the impeller 7, the pressing plate 5 is arranged above the cover body 6 and is fixedly connected with the support frame 4, and the driving shaft 3 penetrates through the centers of the cover body 6 and the pressing plate 5 to be connected with the impeller 7; and a sealing element 8 is arranged at the position of the driving shaft 3 above the impeller 7, and a water retaining ring 9 is arranged above the sealing element 8.

The motor 1 is provided with a support frame 4, and the support frame 4 is fixed above the pump body 2; the support frame 4 is fixedly connected with the pressure plate 5 through bolts. The motor 1 is fixed in the support frame 4, the top and the bottom of the support frame 4 are both provided with bearings, and the bearings are connected with the driving shaft 3.

The lower end part of the driving shaft 3 passes through the center of the impeller 7 and is fixed on the lower end surface of the impeller 7 through a bolt.

The water retaining ring 9 is fixed on the driving shaft 3 and is positioned in the cover body 6. The arrangement is that water brought out by the rotation of the impeller 7 enters the motor 1, so that the motor is protected better.

Said seal 8 is arranged around the drive shaft 3; one end of the sealing element 8 is connected with the impeller 7, and the other end penetrates into the cover body 6. The sealing member 8 is a mechanical sealing member for preventing pumped water from entering the motor through the driving shaft, and plays a role in protecting the motor.

The water inlet and the water outlet of the centrifugal pump are vertical to each other. The water inlet and the water outlet are respectively positioned in the vertical direction and the horizontal direction.

As shown in fig. 2-3, the motor 1 is a squirrel-cage surface-mount self-starting permanent magnet synchronous motor, and includes a rotor core 108, a squirrel cage 107 is disposed outside the rotor core 108, magnetic shoes 104 are fixed outside the squirrel cage 107, and magnetic shoe hoops 109 are fixed outside the magnetic shoes 104. After the magnetic shoe 104 is fixed on the outer side of the squirrel cage 107 in a gluing mode and the like, the magnetic shoe 104 is fixed through the magnetic shoe hoop 109, the magnetic shoe 104 is prevented from falling off, and the working performance of the motor is improved.

The squirrel cage 107 is provided with a plurality of squirrel cage guide rails along the circumferential direction, an accommodating groove is formed between every two adjacent squirrel cage guide rails, and a magnetic tile 104 is arranged in the accommodating groove.

The outer side of the rotor is provided with a stator core 105, and the outer side of the stator core 105 is wound with a stator winding 103. The rotor and the stator are both arranged in a motor shell 101, end covers 102 are welded and fixed at two ends of the motor shell 101, and the centers of the end covers 102 are connected with the driving shaft 3 through bearings 106.

The squirrel cage 107 comprises a first cover ring, a second cover ring and a squirrel cage guide rail positioned between the two end covers, and a containing groove 11 is formed between every two adjacent squirrel cage guide rails. The radial depth of the squirrel cage guide rail is smaller than that of the accommodating groove, and a certain clamping and fixing space is reserved for the magnetic tile hoop 109.

A plurality of accommodating grooves are formed on the outer side of the rotor and are respectively used for accommodating the magnetic shoes 104. The magnetic shoes 104 are fixed to the outside of the rotor by gluing or other means. The radial depth of the accommodating groove is larger than the thickness of the magnetic shoe 104, and the arrangement is to reserve a clamping and fixing space for the magnetic shoe hoop 109.

The middle parts of the two side walls of the containing groove are provided with grooves, the grooves form clamping grooves in the periphery of the rotor, and the clamping grooves are fixedly connected with the magnetic tile hoop 109 in a clamping mode. After the magnetic shoe 104 is fixed on the outer side of the rotor in a gluing mode and the like, the magnetic shoe anchor ear 109 is clamped into the clamping groove to further fix the magnetic shoe 104, and the falling risk of the magnetic shoe is avoided.

The radial depth between the groove bottom of the groove and the groove bottom of the accommodating groove is matched with the thickness of the magnetic shoe, so that the magnetic shoe hoop can be fixed to be close to the surface of the magnetic shoe, and the stabilizing effect of the magnetic shoe is improved.

The axial width of the groove is matched with the axial width of the magnetic shoe hoop 109. The arrangement is to ensure that the magnetic shoe anchor ear 109 can be just clamped into the clamping groove formed by the grooves so as not to axially slide, and the fixing effect on the magnetic shoe is enhanced.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not depart from the essence of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The squirrel-cage surface-mounted self-starting centrifugal pump driven by the permanent magnet synchronous motor is characterized by comprising a motor and a pump body, wherein the motor is connected with the pump body through an integrated driving shaft; the motor is provided with a support frame, and the support frame is fixed above the pump body; the pump body is internally provided with an impeller, a cover body and a pressing plate, the cover body is arranged above the impeller, the pressing plate is arranged above the cover body and is fixedly connected with the supporting frame, and the driving shaft penetrates through the centers of the cover body and the pressing plate and is connected with the impeller; a sealing element is arranged at the position of the driving shaft above the impeller, and a water retaining ring is arranged above the sealing element; the motor is a squirrel-cage surface-mounted self-starting permanent magnet synchronous motor and comprises a rotor core, a squirrel cage is arranged on the outer side of the rotor core, magnetic shoes are fixed on the outer side of the squirrel cage, and magnetic shoe hoops are fixed on the outer side of the magnetic shoes.

2. The centrifugal pump driven by the squirrel-cage surface-mounted self-starting permanent magnet synchronous motor as claimed in claim 1, wherein the lower end part of the driving shaft penetrates through the center of the impeller and is fixed on the lower end surface of the impeller through a bolt.

3. The centrifugal pump driven by the squirrel-cage surface-mounted self-starting permanent magnet synchronous motor as claimed in claim 1, wherein the motor is fixed in a support frame, bearings are arranged at the top and the bottom of the support frame, and the bearings are connected with a driving shaft.

4. The centrifugal pump driven by the squirrel-cage surface-mounted self-starting permanent magnet synchronous motor as claimed in claim 1, wherein the support frame is fixedly connected with the pressure plate through bolts.

5. The centrifugal pump driven by the squirrel-cage surface-mounted self-starting permanent magnet synchronous motor as claimed in claim 1, wherein the water retaining ring is fixed on the driving shaft and is positioned in the cover body.

6. The centrifugal pump driven by the squirrel cage surface-mounted self-starting permanent magnet synchronous motor of claim 1, wherein the seal is disposed around a drive shaft; one end of the sealing element is connected with the impeller, and the other end of the sealing element penetrates into the cover body.

7. The centrifugal pump driven by the squirrel-cage surface-mounted self-starting permanent magnet synchronous motor according to claim 1, wherein the water inlet and the water outlet of the centrifugal pump are positioned perpendicular to each other.

8. The centrifugal pump driven by the squirrel-cage surface-mounted self-starting permanent magnet synchronous motor as claimed in claim 1, wherein a plurality of squirrel-cage guide rails are arranged along the circumferential direction of the squirrel-cage, a containing groove is arranged between every two adjacent squirrel-cage guide rails, and a magnetic tile is placed in the containing groove.