Submerged magnetic pump

Abstract

The utility model relates to a kind of liquid below magnetic force pump, including by upper sequentially arranged tray, bracket, motor and magnetic force pump body;Magnetic force pump body includes pump body;Pump cover is arranged on the upper end of pump body, and pump cover and pump body form pump cavity;With the side of pump body away from pump cover and form the isolating chamber of isolating sleeve that encloses;Pump shaft is penetrated through pump cavity and isolating chamber;Impeller is located in pump cavity and is arranged at one end of pump shaft;Inner rotor is located in isolating chamber and is set on pump shaft;Outer rotor is located outside isolating chamber and is oppositely arranged with inner rotor;Connection frame is arranged on the periphery of outer rotor, and one end of connection frame is in abutment with pump body, and the other end is in abutment with motor, and the output end of motor is connected with outer rotor;Outlet pipe, one end of outlet pipe is arranged in pump body outlet, and the other end passes through tray.The utility model places motor directly below baffle, and rotor of motor is directly connected with outer rotor in pump, without using long shaft to transmit torque, there is no flexing, and it can be operated under liquid at any depth.

Description

TECHNICAL FIELD

[0001] The utility model relates to magnetic force pump technical field, concretely relates to a liquid below magnetic force pump. BACKGROUND

[0002] Pump is a kind of liquid energy conversion machinery, commonly used to increase the potential energy, pressure energy, kinetic energy etc. of liquid.Centrifugal pump utilizes prime mover to drive impeller to work on liquid by pump shaft high-speed rotation, to generate pressure head.

[0003] The installation position of centrifugal pump generally has two ways, 1, utilizes liquid self-weight and flows into pump, 2, utilizes pump and absorbs liquid below pump inlet, common pump is self-priming pump.

[0004] Liquid below pump is a kind of centrifugal pump with pump body diving into liquid inside, can effectively solve the problem of insufficient self-priming pump suction capacity, but liquid below depth cannot exceed 3m, when exceeding 3m, liquid below long shaft causes bearing and mechanical seal damage due to deflection, so that material will leak to external environment.Liquid below pump with mechanical seal, liquid below pump with packing seal has poor sealing performance, is easy to damage, is frequently maintained, has security risk, and production efficiency is low. CONTENT OF UTILITY MODEL

[0005] The utility model aims at overcoming at least one of the defects of the prior art and provides a liquid below magnetic force pump.

[0006] The purpose of the utility model can be realized by the following technical schemes: A liquid below magnetic force pump, comprising from top to bottom in sequence arranged supporting plate, bracket, motor and magnetic force pump body; The magnetic force pump body includes Pump body; Pump cover arranged on the upper end of pump body, the pump cover and the pump body form pump cavity; Isolation sleeve that forms isolation cavity with the side of pump body away from the pump cover; Pump shaft that penetrates pump cavity and isolation cavity; Impeller located in pump cavity and arranged at one end of pump shaft; Inner rotor located in isolation cavity and sleeved on pump shaft; Outer rotor located outside isolation cavity and arranged opposite to inner rotor; Connecting frame arranged on the periphery of outer rotor, one end of the connecting frame is in abutment with the pump body, the other end is in abutment with motor, and the output end of the motor is connected with the outer rotor; Outlet pipe, one end of the outlet pipe is arranged in pump body outlet, and the other end penetrates the supporting plate.

[0007] Further, the motor includes: Stator shell; An upper bearing end cover and a lower bearing end cover are respectively arranged at two ends of the stator casing, the upper bearing end cover is abutted with the bracket, and the lower bearing end cover is abutted with the connecting frame; A rotor is arranged in the stator casing, two ends of the rotor are respectively rotationally connected with the upper bearing end cover and the lower bearing end cover, and the periphery of the rotor is provided with a stator.

[0008] Further, a fifth sealing gasket is arranged at the abutting position of the upper bearing end cover and the bracket, and a fourth sealing gasket is arranged at the abutting position of the upper bearing end cover and the stator casing.

[0009] Further, a third sealing gasket is arranged at the abutting position of the lower bearing end cover and the stator casing, and a second sealing gasket is arranged at the abutting position of the lower bearing end cover and the connecting frame.

[0010] Further, rolling bearings are arranged at the connecting positions of the two ends of the rotor and the upper bearing end cover and the lower bearing end cover.

[0011] Further, a bearing assembly is further arranged on the pump shaft, the bearing assembly comprises a pair of shaft sleeves arranged on the pump shaft, a blocking sleeve arranged on the pump shaft and between the pair of shaft sleeves, a pair of sliding bearings arranged at the periphery of the pair of shaft sleeves, and a bearing seat arranged at the periphery of the pair of sliding bearings.

[0012] Further, a pair of thrust discs are arranged on the pump shaft, and the pair of thrust discs are arranged at two sides of the bearing seat.

[0013] Further, a first sealing gasket is arranged at the abutting position of the pump body and the pump cover.

[0014] Further, a vane nut is arranged between the pump shaft and the impeller for connecting the pump shaft and the impeller.

[0015] Further, a terminal box is arranged on the upper end surface of the supporting plate, the bracket is provided with a terminal pipe penetrating through two ends of the bracket, and the motor and the terminal box are electrically connected through a wire arranged in the terminal pipe.

[0016] Compared with the prior art, the liquid-submerged magnetic pump has the following advantages: (1) The liquid-submerged magnetic pump directly places the motor below the baffle and directly connects the rotor of the motor with the outer rotor in the pump, without using a long shaft to transmit torque, without deflection, and can be operated under liquid at any depth, thereby expanding the use range of the pump.

[0017] (2) The utility model provides a kind of under liquid magnetic pump, the magnetic coupling principle is used to the magnetic pump, torque is transmitted by the magnetic attraction between inner rotor and outer rotor, outer rotor is connected motor, inner rotor is connected pump shaft, without the physical rigid connection of traditional mechanical shaft, so pump shaft does not need to penetrate the isolation cavity to realize power transmission, there is no dynamic seal on pump shaft, safe and reliable, the service life of pump is greatly improved, and maintenance cost is reduced.

[0018] (3) The utility model provides a kind of under liquid magnetic pump, motor of the magnetic pump is submerged in medium, heat generated by motor is taken away using medium, without increasing fan blade in motor tail, reduce the energy consumption of motor, the efficiency of whole pump is higher, and energy-saving effect is remarkable. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the schematic diagram of under liquid magnetic pump in embodiment; Figure 2 It is Figure 1 One of partial enlarged view in Figure 3 It is Figure 1 Second partial enlarged view in Figure 4 It is Figure 1 Third partial enlarged view in Marked in figure: 1-pump body;2-impeller;3-pump shaft;4-pump cover;5-bearing seat;6-thrust disc;7-sliding bearing;8-shaft sleeve;9-retaining sleeve;10-inner rotor;11-isolation sleeve;12-outer rotor;13-connection frame;14-lower bearing end cover;15-rolling bearing;16-rotor;17-stator;18-stator casing;19-upper bearing end cover;20-carriage;21-wiring tube;22-wiring box;23-outlet pipe;24- support plate;101-first sealing gasket;102-second sealing gasket;103-third sealing gasket;104-fourth sealing gasket;105-fifth sealing gasket. DETAILED DESCRIPTION

[0020] The utility model will be explained in detail in combination with the drawings and specific embodiment. This embodiment is implemented under the premise of the technical scheme of the utility model, and detailed implementation mode and specific operation process are given, but the protection scope of the utility model is not limited to the following examples.

[0021] EMBODIMENT This embodiment provides a kind of under liquid magnetic pump, see Figures 1-4 Specific structure, including by the support plate 24, carriage 20, motor and magnetic pump body sequentially arranged from top to bottom; The magnetic pump body includes pump body 1, pump cover 4, isolation sleeve 11, pump shaft 3, impeller 2, inner rotor 10, outer rotor 12, connection frame 13 and outlet pipe 23; The pump cover 4 is arranged on the upper end of the pump body 1, and forms a pump cavity together with the pump body 1; The isolation sleeve 11 forms an isolation cavity together with the pump body 1 away from the pump cover 4; The pump shaft 3 penetrates the pump cavity and the isolation cavity; The impeller 2 is located in the pump cavity and arranged at one end of the pump shaft 3; The inner rotor 10 is located in the isolation cavity and sleeved on the pump shaft 3; The outer rotor 12 is located outside the isolation cavity and arranged opposite to the inner rotor 10; The outer rotor 12 is arranged on the periphery of the outer rotor 12, one end of which abuts against the pump body 1, and the other end abuts against the motor, the output end of the motor is connected with the outer rotor 12, without using a long shaft to transmit torque, without deflection, and can be operated at any depth of liquid, expanding the use range of the pump.

[0022] One end of the outlet pipe 23 is arranged at the outlet of the pump body 1, and the other end penetrates the supporting plate 24.

[0023] In the embodiment, the motor includes a stator shell 18, an upper bearing end cover 19, a lower bearing end cover 14, and a rotor 16; the upper bearing end cover 19 and the lower bearing end cover 14 are respectively arranged at two ends of the stator shell 18, the upper bearing end cover 19 abuts against the bracket 20, and the lower bearing end cover 14 abuts against the connecting frame 13; the rotor 16 is arranged in the stator shell 18, two ends of the rotor 16 are respectively rotationally connected with the upper bearing end cover 19 and the lower bearing end cover 14, and the periphery of the rotor 16 is provided with a stator 17; wherein the rotor 16 is coaxially connected with the outer rotor 12 directly, In the embodiment, the fifth sealing gasket 105 is arranged at the abutting position of the upper bearing end cover 19 and the bracket 20; and the fourth sealing gasket 104 is arranged at the abutting position of the upper bearing end cover 19 and the stator shell 18.

[0024] In the embodiment, the third sealing gasket 103 is arranged at the abutting position of the lower bearing end cover 14 and the stator shell 18, and the second sealing gasket 102 is arranged at the abutting position of the lower bearing end cover 14 and the connecting frame 13.

[0025] In the embodiment, the rolling bearings 15 are arranged at the connection positions of the two ends of the rotor 16 and the upper bearing end cover 19 and the lower bearing end cover 14 respectively.

[0026] In the embodiment, the pump shaft 3 is further provided with a bearing assembly, the bearing assembly includes a pair of shaft sleeves 8 sleeved on the pump shaft 3, a blocking sleeve 9 sleeved on the pump shaft 3 and arranged between the pair of shaft sleeves 8, a pair of sliding bearings 7 arranged at the periphery of the pair of shaft sleeves 8 respectively, and a bearing seat 5 arranged at the periphery of the pair of sliding bearings 7.

[0027] In this embodiment, a pair of thrust discs 6 are also fitted on the pump shaft 3, and the pair of thrust discs 6 are located on both sides of the bearing seat 5.

[0028] In this embodiment, a first sealing gasket 101 is provided at the abutment of the pump body 1 and the pump cover 4.

[0029] In this embodiment, an impeller nut is provided between the pump shaft 3 and the impeller 1 to connect the two.

[0030] In this embodiment, a junction box 22 is provided on the upper surface of the tray 24, and a wiring pipe 21 is provided on the bracket 20 through both ends of the bracket. The motor is electrically connected to the junction box 22 through a line provided in the wiring pipe 21.

[0031] Working principle: When using this submersible magnetic pump, it is first installed in the tower reactor via the support plate 24. The motor is connected and fixed to the support frame 20 via the upper bearing end cover 19 and placed inside the tower reactor together, directly contacting the conveying medium. The lower bearing end cover 14 of the motor is then connected to the connecting frame 13, and the connecting frame 13 is sequentially connected to the pump body 1 as a whole. During this process, the fifth sealing gasket 105 located where the upper bearing end cover 19 abuts against the support frame 20, the fourth sealing gasket 104 located where the upper bearing end cover 19 abuts against the stator housing 18, the third sealing gasket 103 located where the lower bearing end cover 14 abuts against the stator housing 18, and the second sealing gasket 102 located where the lower bearing end cover 14 abuts against the connecting frame 13 together seal the conveying medium outside the motor, ensuring that the medium does not enter the motor cavity inside the stator housing 18. At the same time, the first sealing gasket 101 located where the pump body 1 abuts against the pump cover 4 seals the liquid inside the pump cavity. The seal prevents the conveyed medium from leaking into the environment or seeping into the motor. When the external power supply is connected to the terminal block 22 on the upper end of the tray 24 and powered, the motor starts running. The motor rotor 16 rotates at high speed and drives the outer rotor 12 to rotate synchronously. The outer rotor 12 drives the inner rotor 10 in the cavity of the isolation sleeve 11 to rotate through magnetic coupling. The inner rotor 10 drives the pump shaft 3 connected to it. The pump shaft 3 rotates stably under the auxiliary support of the bearing assembly composed of the shaft sleeve 8, the retaining sleeve 9, the sliding bearing 7, and the bearing seat 5, as well as the thrust discs 6 on both sides. This drives the impeller 2 connected to one end of the pump shaft 3 in the pump cavity to rotate synchronously. The rotation of the impeller 2 generates a pressure head, which transports the liquid in the pump cavity to the process requirement position through the outlet pipe 23 set at the outlet of the pump body 1. There is no dynamic sealing structure on the pump shaft 3 during the whole process, which fundamentally avoids the leakage problem of the conveyed medium.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A submersible magnetic pump, characterized in that, It includes a tray (24), a bracket (20), a motor, and a magnetic pump body arranged sequentially from top to bottom; The magnetic pump body includes Pump body (1); A pump cover (4) is provided at the upper end of the pump body (1), and the pump cover (4) and the pump body (1) together form a pump cavity; An isolation sleeve (11) is formed by enclosing the side of the pump body (1) away from the pump cover (4) to form an isolation cavity. Pump shaft (3) that runs through the pump chamber and the isolation chamber; An impeller (2) is located inside the pump chamber and is installed at one end of the pump shaft (3); An inner rotor (10) is located inside the isolation chamber and sleeved on the pump shaft (3). An outer rotor (12) is located outside the isolation chamber and is positioned opposite to the inner rotor (10); A connecting frame (13) is provided around the outer rotor (12). One end of the connecting frame (13) abuts against the pump body (1), and the other end abuts against the motor. The output end of the motor is connected to the outer rotor (12). The outlet pipe (23) has one end located at the outlet of the pump body (1) and the other end passing through the tray (24).

2. The submersible magnetic pump according to claim 1, characterized in that, The motor includes: Stator housing (18); The upper bearing end cover (19) and the lower bearing end cover (14) are respectively provided at both ends of the stator housing (18). The upper bearing end cover (19) abuts against the bracket (20), and the lower bearing end cover (14) abuts against the connecting frame (13). The rotor (16) is disposed on the stator housing (18). The two ends of the rotor (16) are rotatably connected to the upper bearing end cover (19) and the lower bearing end cover (14) respectively. The stator (17) is disposed around the rotor (16).

3. A submersible magnetic pump according to claim 2, characterized in that, A fifth sealing gasket (105) is provided at the point where the upper bearing end cover (19) abuts against the bracket (20); a fourth sealing gasket (104) is provided at the point where the upper bearing end cover (19) abuts against the stator housing (18).

4. A submersible magnetic pump according to claim 2, characterized in that, A third sealing gasket (103) is provided at the abutment of the lower bearing end cover (14) and the stator housing (18), and a second sealing gasket (102) is provided at the abutment of the lower bearing end cover (14) and the connecting frame (13).

5. A submersible magnetic pump according to claim 2, characterized in that, Rolling bearings (15) are provided at the connection points of the rotor (16) with the upper bearing end cover (19) and the lower bearing end cover (14), respectively.

6. A submersible magnetic pump according to claim 1, characterized in that, The pump shaft (3) is also provided with a bearing assembly, which includes a pair of bushings (8) sleeved on the pump shaft (3), a retainer (9) sleeved on the pump shaft (3) and located between the pair of bushings (8), a pair of sliding bearings (7) respectively disposed around the pair of bushings (8), and a bearing seat (5) disposed around the pair of sliding bearings (7).

7. A submersible magnetic pump according to claim 6, characterized in that, A pair of thrust discs (6) are also fitted on the pump shaft (3), and the pair of thrust discs (6) are located on both sides of the bearing seat (5).

8. A submersible magnetic pump according to claim 1, characterized in that, A first sealing gasket (101) is provided at the point where the pump body (1) and the pump cover (4) meet.

9. A submersible magnetic pump according to claim 1, characterized in that, An impeller nut is provided between the pump shaft (3) and the impeller (2) for connecting the two.

10. A submersible magnetic pump according to claim 1, characterized in that, A junction box (22) is provided on the upper surface of the tray (24), and a wiring pipe (21) is provided on the bracket (20) through both ends. The motor is electrically connected to the junction box (22) through a line provided in the wiring pipe (21).

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