CN215566661U

CN215566661U - Shielding permanent magnet frequency conversion multistage pump

Info

Publication number: CN215566661U
Application number: CN202121054325.XU
Authority: CN
Inventors: 赵仙岳
Original assignee: Zhejiang Yaobin Electromechanical Co ltd
Current assignee: Zhejiang Yaobin Electromechanical Co ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2022-01-18
Anticipated expiration: 2031-05-14

Abstract

The utility model discloses a shielding type permanent magnet variable frequency multistage pump, which belongs to the technical field of water pumps and solves the problems of larger noise vibration, high working energy consumption and short service life of the existing water pump structure.

Description

Shielding permanent magnet frequency conversion multistage pump

Technical Field

The utility model relates to the field of water pumps, which are mainly used for pumping water and supplying water for household deep wells, in particular to a shielding type permanent magnet variable-frequency multistage pump.

Background

Generally speaking, in the domestic water pump field, the influence of vibration and noise is not considered because structural design to most water pumps for the water pump noise is great when work, and the vibration influences life, and the power consumption also improves after long-term the use, and the stability of structure remains to be solved.

For the shielded multistage pump, the known prior art discloses an amphibious shielded permanent magnet high-speed multistage pump which has the advantages of good heat dissipation, high lift and high efficiency of a motor, can realize multiple purposes under water and on land, the technical proposal is that the pump comprises a pump shell, a motor component and an impeller, wherein the motor component comprises a motor cylinder, a stator, a rotor and a rotor shaft, the pump case overlaps in the motor barrel outside, is equipped with last connecting seat and the lower connecting seat that is used for fixed motor barrel in the pump case, forms the water cavity between pump case and the motor barrel, is equipped with the shaft on the lower extreme of rotor shaft, and the impeller is multi-stage structure and all installs on the lower extreme of rotor shaft, and the upper end of pump case is equipped with the extrusion room, and the lower extreme of pump case is the water inlet, and the water inlet, cross the water cavity and the extrusion room and communicate in proper order, is equipped with the bottom connecting seat on the water inlet, and the bottom connecting seat includes the axle sleeve portion with the shaft adaptation and is used for external threaded connection mouth.

The motor assembly with the structure forms shielding through the motor barrel and forms the water cavity for heat dissipation, but the heat dissipation contact effect of the motor assembly is not ideal enough, and needs to be further improved. The design of a rotor shaft or other water pumps generally needs to be provided with a bearing, and the bearing is easy to cause lubricating oil leakage and bearing vibration. In considering the design of the structural space compactness, the whole length of the existing design scheme is large, an additional water passing cavity needs to be arranged, and the cooling effect is not high enough due to the limitation of the design of the water passing space.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, at least solves the technical problems in the related art to a certain extent, and provides a shielding type permanent magnet variable frequency multistage pump so as to achieve the aims of reducing vibration, reducing noise, saving energy, improving heat dissipation and miniaturizing the structure without bearing assembly.

In order to solve the technical problems, the technical scheme of the utility model is as follows: a shielding type permanent magnet variable frequency multistage pump comprises a pump head assembly and a motor assembly, wherein the motor assembly comprises a water pump shell, a motor shell, an inner shielding sleeve, a stator assembly, a rotor assembly, a front end cover and a rear end cover; the stator assembly is fixed in a closed space formed between the motor shell and the inner shielding sleeve and is filled and packaged by epoxy resin, two ends of the inner shielding sleeve and the motor shell are fixed in the water pump shell through fixing rings, and a front end cover and a rear end cover are fixedly assembled at two ends of the water pump shell respectively;

the rotor assembly comprises a main shaft, a permanent magnet rotor, an aluminum ring, an upper grinding disc and a thrust grinding disc, wherein the permanent magnet rotor is fixed on the main shaft through the aluminum ring, and the upper grinding disc and the thrust grinding disc are respectively assembled at two ends of the aluminum ring;

the front end cover and the rear end cover are both provided with graphite shaft sleeves, the main shaft penetrates through the two graphite shaft sleeves, the front end cover is provided with a water through hole, and the water through hole is communicated with an inner cavity space formed by the inner shielding sleeve, the motor shell and the water pump shell.

As specific embodiments of the present invention, the following may be preferred: the rear end of the thrust grinding disc is connected with a thrust grinding disc in an abutting mode.

As specific embodiments of the present invention, the following may be preferred: the center of the rear end cover is provided with a micro air bag.

As specific embodiments of the present invention, the following may be preferred: the pump head assembly comprises a pump head main body, a multistage pump body assembled in the pump head main body, a five-way joint fixed on the pump head main body and a pressure tank assembled on the five-way joint, wherein the multistage pump body is assembled on a main shaft and driven by the main shaft, a water discharging bolt, a water inlet interface and a water adding bolt are arranged on the pump head main body, a sensor and a plug are further installed on the five-way joint, a controller is installed on a water pump shell, the sensor is connected to the controller through a lead, and a frequency converter is installed in the controller.

As specific embodiments of the present invention, the following may be preferred: the multistage pump body comprises a guide shell, a plurality of guide vanes and an impeller, wherein the guide vanes and the impeller are assembled in the guide shell, and the impeller is fixed at the position of a shaft head of the main shaft.

As specific embodiments of the present invention, the following may be preferred: the pump head main part and the water pump shell are provided with a support, and a shockproof pad is fixed at the bottom of the support.

As specific embodiments of the present invention, the following may be preferred: the pump head main part and the water pump shell are assembled in a sealing mode through a sealing groove structure and are fixed with each other through a flange plate structure.

The technical effects of the utility model are mainly reflected in the following aspects: 1. the structure is compact and miniaturized, a horizontal structure is adopted, the driving principle of a permanent magnet motor is utilized, and the energy is saved by combining with the control of a frequency converter; 2. the mechanical bearing is not used, the graphite shaft sleeves are adopted for matching, vibration and noise are reduced, and the support and the anti-vibration pad are utilized for greatly reducing the noise; 3. the rotor is a permanent magnet which can contact water and is filled with water in the environment, the stator is encapsulated by epoxy resin, is not easy to leak electricity, is insulated and isolated, is shielded and isolated by using a shielding sleeve, increases the volume of a space for containing water, and can be filled with water for efficient cooling; 4. the service life of the device is greatly prolonged.

Drawings

FIG. 1 is a schematic view of the overall structure of the embodiment;

FIG. 2 is a schematic side view of a pump head body according to an embodiment;

FIG. 3 is a schematic front view of a pump head body according to an embodiment;

FIG. 4 is a structural diagram illustrating a disassembled state of the motor assembly according to the embodiment.

Reference numerals: 1. a water pump housing; 2. a motor housing; 3. an inner shielding sleeve; 4. a stator assembly; 41. an epoxy resin; 42. a fixing ring; 5. a rotor assembly; 51. a main shaft; 52. a permanent magnet rotor; 53. an aluminum ring; 61. a front end cover; 62. a rear end cap; 63. a graphite shaft sleeve; 64. water passing holes; 71. an upper grinding disc; 72. a thrust grinding disc; 73. grinding the sheet by thrust; 8. a micro air bag; 91. a pump head main body; 911. a water discharging bolt; 912. a water inlet interface; 913. adding water into the bolt; 92. a multi-stage pump body; 921. a guide shell; 922. a guide vane; 923. an impeller; 93. a five-way joint; 94. a pressure tank; 95. a sensor; 96. a plug; 97. a controller; 98. a wire; 10. a crash pad; 11. a seal groove structure; 12. and (4) a bracket.

Detailed Description

The embodiments of the present invention will be described in detail below, examples of which are illustrated in the accompanying drawings, and the embodiments described below by referring to the drawings are exemplary and intended to explain the present invention so that the technical aspects of the present invention can be more easily understood and appreciated, and are not to be construed as limiting the present invention.

Example (b):

a shielded permanent magnet variable frequency multistage pump, as shown in fig. 1 and 4, comprising a pump head assembly and a motor assembly.

As shown in fig. 1, 2, and 3, the pump head assembly includes a pump head main body 91, a multistage pump body 92 fitted inside the pump head main body 91, a five-way joint 93 fixed to the pump head main body 91, and a pressure tank 94 fitted on the five-way joint 93. The pump head main body 91 is provided with a water discharging bolt 911, a water inlet connector 912 and a water adding bolt 913, and a top water outlet of the pump head main body 91 is connected with a five-way joint 93. The five-way joint 93 is also provided with a sensor 95 and a plug 96, and the five-way joint 93 is also used for connecting an external water supply pipeline. The sensor 95 is a pressure sensor 95, the sensor 95 is connected to a controller 97 through a lead 98, and a frequency converter is installed in the controller 97. The controller 97 is installed on the water pump housing 1, and the controller 97 is arranged above the water pump housing 1. The rear of the controller 97 is connected with an external cable through an aviation plug for connecting with a mains supply. The multistage pump body 92 is fitted on the main shaft 51 and is driven by the main shaft 51 of the motor assembly.

Referring to fig. 1 and 4, the multistage pump body 92 includes a guide shell 921, a plurality of guide vanes 922 assembled in the guide shell 921, and an impeller 923 fixed at a spindle head position of the main shaft 51. The impeller 923 rotates, and water pumping is achieved through the guide vane 922 and the guide shell 921 in a matched mode. The multi-stage pump body 92 is installed in the pump head main body 91, and the pump head main body 91 and the front end cover 61 are fixed by a flange structure and bolts. In addition, the pump head main body 91 and the water pump housing 1 are provided with a bracket 12, and a crash pad 10 is fixed to the bottom of the bracket 12. The pump head main body 91 and the water pump housing 1 are hermetically fitted through a seal groove structure 11 and fixed to each other through a flange structure.

It can be seen that the motor assembly and the pump head assembly of the above structure are designed in a horizontal type, and the main shaft 51 is in a horizontal direction. This operation reduces vibration through the crash pad 10.

As can be understood from fig. 4, the motor assembly includes a water pump housing 1, a motor housing 2, an inner shield 3, a stator assembly 4, a rotor assembly 5, a front end cover 61, and a rear end cover 62.

The stator assembly 4 is fixed in a closed space formed between the motor housing 2 and the inner shield 3 and is filled and encapsulated by an epoxy resin 41. The stator assembly 4 is provided with a copper coil winding, the inner side and the outer side of the stator assembly 4 are respectively provided with the inner shielding sleeve 3 and the motor shell 2, so that the coil winding is protected, and the end part is filled and sealed through epoxy resin 41 to play triple roles of water resistance, isolation and sealing. When the cooling water tank works, the outside of the cooling water tank is completely filled with water, so that the storage space and storage capacity of the cooling water are greatly improved, and the heat dissipation effect is improved.

At the both ends of interior shield sleeve 3 and motor housing 2 through solid fixed ring 42 fix in water pump housing 1, through solid fixed ring 42, improve stator module 4's stability and concentricity. A front cover 61 and a rear cover 62 are fixedly assembled at both ends of the water pump housing 1, respectively. Graphite shaft sleeves 63 are arranged on the front end cover 61 and the rear end cover 62, the main shaft 51 penetrates through the two graphite shaft sleeves 63, a water through hole 64 is arranged on the front end cover 61, and the water through hole 64 is communicated with an inner cavity space formed by the inner shielding sleeve 3, the motor shell 2 and the water pump shell 1. The function of the water through holes 64 is to allow part of the pumped water to fill the inner cavity space for cooling the stator and rotor.

The rotor assembly 5 comprises a main shaft 51, a permanent magnet rotor 52, an aluminum ring 53, an upper grinding disc 71 and a thrust grinding disc 72, wherein the permanent magnet rotor 52 is fixed on the main shaft 51 through the aluminum ring 53, and the upper grinding disc 71 and the thrust grinding disc 72 are respectively assembled at two ends of the aluminum ring 53; the rear end of the thrust grinding disc 72 is abutted with a thrust grinding disc 73. By using the structure, a mechanical bearing is cancelled, thereby reducing vibration and noise. In addition, the structure tightness and the working stability are improved by using the thrust grinding disc 72.

Finally, a micro-balloon 8 is mounted in the center of the rear end cap 62. The micro air bag 8 can buffer and absorb shock during the whole working or using process.

The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.

Claims

1. A shielding type permanent magnet variable frequency multistage pump comprises a pump head assembly and a motor assembly, and is characterized in that the motor assembly comprises a water pump shell (1), a motor shell (2), an inner shielding sleeve (3), a stator assembly (4), a rotor assembly (5), a front end cover (61) and a rear end cover (62); the stator assembly (4) is fixed in a closed space formed between the motor shell (2) and the inner shielding sleeve (3) and is filled and encapsulated by epoxy resin (41), two ends of the inner shielding sleeve (3) and the motor shell (2) are fixed in the water pump shell (1) through fixing rings (42), and a front end cover (61) and a rear end cover (62) are fixedly assembled at two ends of the water pump shell (1) respectively;

the rotor assembly (5) comprises a main shaft (51), a permanent magnet rotor (52), an aluminum ring (53), an upper grinding disc (71) and a thrust grinding disc (72), wherein the permanent magnet rotor (52) is fixed on the main shaft (51) through the aluminum ring (53), and the upper grinding disc (71) and the thrust grinding disc (72) are respectively assembled at two ends of the aluminum ring (53);

graphite shaft sleeves (63) are arranged on the front end cover (61) and the rear end cover (62), the main shaft (51) penetrates through the two graphite shaft sleeves (63), a water passing hole (64) is formed in the front end cover (61), and the water passing hole (64) is communicated with an inner cavity space formed by the inner shielding sleeve (3), the motor shell (2) and the water pump shell (1).

2. The shielded permanent magnet variable frequency multistage pump of claim 1, wherein: the rear end of the thrust grinding disc (72) is abutted with a thrust grinding disc (73).

3. The shielded permanent magnet variable frequency multistage pump of claim 1, wherein: the center of the rear end cover (62) is provided with a micro air bag (8).

4. The shielded permanent magnet variable frequency multistage pump of claim 1, wherein: the pump head assembly comprises a pump head main body (91), a multistage pump body (92) assembled in the pump head main body (91), a five-way joint (93) fixed on the pump head main body (91), and a pressure tank (94) assembled on the five-way joint (93), the multistage pump body (92) is assembled on a main shaft (51) and driven by the main shaft (51), a water drainage bolt (911) is arranged on the pump head main body (91), a water inlet interface (912) and a water addition bolt (913) are arranged, a sensor (95) and a plug (96) are further installed on the five-way joint (93), a controller (97) is installed on a water pump shell (1), the sensor (95) is connected to the controller (97) through a lead (98), and a frequency converter is installed in the controller (97).

5. The shielded permanent magnet variable frequency multistage pump according to claim 4, characterized in that: the multistage pump body (92) includes kuppe (921), a plurality of stator (922) and impeller (923) of assembly in kuppe (921), and spindle nose position at main shaft (51) is fixed in impeller (923).

6. The shielded permanent magnet variable frequency multistage pump according to claim 4, characterized in that: the pump head main body (91) and the water pump shell (1) are provided with a support (12), and a shockproof pad (10) is fixed at the bottom of the support (12).

7. The shielded permanent magnet variable frequency multistage pump according to claim 4, characterized in that: the pump head main body (91) and the water pump shell (1) are assembled in a sealing mode through a sealing groove structure (11) and are fixed to each other through a flange structure.