Self-priming pump driven by permanent magnet

Abstract

The utility model discloses a self-priming pump driven by a permanent magnet. The self-priming pump comprises a motor and a self-priming pump body in transmission connection with the motor, the motor comprises a base, a motor outer shell is installed on the base, a containing cavity is formed in the outer shell, a base is arranged at the bottom of the containing cavity, a stator and a rotor are arranged on the base, the stator is distributed along the inner wall of the containing cavity, the rotor is arranged in the middle of the containing cavity, and the outer side face of the rotor is surrounded by the stator. The end part of the rotor is in transmission connection with the self-priming pump body; the self-priming pump body comprises a pump shell, a flow channel cavity is formed in the pump shell, a pump impeller is arranged in the flow channel cavity, a flow channel inlet and a flow channel outlet which are communicated with the flow channel cavity are formed in the pump shell, a connecting flange is arranged at a port of the flow channel outlet, and the connecting flange is integrally connected with the pump shell. When the motor is started, the stator conducts electricity to generate an electromagnetic field, the rotor is driven to rotate, then the transmission shaft and the pump impeller which are arranged on the rotor are driven to rotate, transmission efficiency is high, and energy consumption is low.

Description

Technical Field

[0001] This utility model relates to the field of self-priming pumps, and in particular to a self-priming pump driven by a permanent magnet. Background Technology

[0002] Self-priming pumps offer advantages such as compact structure, convenient operation, stable running, easy maintenance, high efficiency, long service life, and strong self-priming capability. No foot valve is required in the pipeline; only a certain amount of priming liquid needs to be present in the pump body before operation. Different materials can be used for self-priming pumps depending on the liquid. The working principle of a self-priming pump is as follows: before starting the pump, the pump casing is filled with water, or the pump casing itself contains water. After starting, the impeller rotates at high speed, causing the water in the impeller channels to flow towards the volute. At this time, a vacuum is formed at the inlet, opening the inlet check valve and allowing air from the suction pipe to enter the pump and reach the outer edge through the impeller channels.

[0003] For example, patent document No. 202120811193.4 discloses a filter-type self-priming pump with good heat dissipation for self-priming pumps, including a base, a self-priming pump base plate and a connecting column. The self-priming pump is fixedly connected to the upper end of the base, a motor is fixedly connected to the left end of the self-priming pump, a heat dissipation chamber is fixedly connected to the left end of the motor, a cooling fan is movably connected inside the heat dissipation chamber, a filter is connected through one side of the self-priming pump, a dosing pipe is connected through one side of the filter surface, a pipe cover is movably connected to one side of the dosing pipe, a propeller motor is fixedly connected to the other side of the filter surface, a rotating shaft is movably connected to one side of the propeller motor, and a propeller is fixedly connected to the surface of the rotating shaft.

[0004] In the above technical solution, the fixing plate and the motor are integrated, making the connection between the motor and the fixed base plate more stable. The damping plate and the fixing plate are centrally symmetrical, and the screws are sequentially and equidistantly inserted into the surface of the damping plate, which enhances the tightness of the connection between the motor and the motor base plate, resulting in better motor vibration damping. This prevents the motor from vibrating due to excessive power generated when the motor drives the impeller to rotate, avoids the motor from shaking with the connecting seat, and solves the problem of excessive noise generated by the motor during operation, so as not to interfere with the user's hearing and to benefit practical use.

[0005] However, when the motor in the above technical solution starts, it drives the outer magnetic rotor to rotate. This rotating magnetic field is transmitted through the container wall or isolation sleeve and drives the inner magnetic rotor to rotate, which in turn drives the transmission shaft and pump impeller connected to the inner magnetic rotor to rotate. The above transmission structure has low transmission efficiency and high energy consumption.

[0006] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0007] The purpose of this invention is to provide a self-priming pump driven by a permanent magnet to overcome the shortcomings of existing technologies.

[0008] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0009] A self-priming pump driven by a permanent magnet includes a motor and a pump body that is connected to the motor drive.

[0010] The motor includes a base, on which a motor housing is mounted. Inside the housing is a receiving cavity, and at the bottom of the receiving cavity is a base. A stator and a rotor are mounted on the base. The stator is distributed along the inner wall of the receiving cavity, and the rotor is located in the middle of the receiving cavity. The outer side of the rotor is surrounded by the stator, and the end of the rotor is connected to the self-priming pump body for transmission.

[0011] The self-priming pump body includes a pump casing, a flow channel cavity inside the pump casing, a pump impeller inside the flow channel cavity, and a flow channel inlet and a flow channel outlet communicating with the flow channel cavity, respectively, on the pump casing. A connecting flange is provided at the port of the flow channel outlet, and the connecting flange is integrally connected to the pump casing.

[0012] Furthermore, the stator includes a stator frame fixedly mounted along the inner wall of the receiving cavity, and a coil wound on the stator frame.

[0013] Furthermore, the rotor includes a rotor frame disposed within the stator frame, on which a permanent magnet and a drive shaft are disposed. The outer side of the permanent magnet is the stator coil. The permanent magnet is fixed by a limiting member disposed at the end. The end of the drive shaft extends out of the motor housing and is connected to the pump impeller of the self-priming pump body.

[0014] Furthermore, the base is provided with several limiting structures, and the bottoms of the stator frame and the rotor frame are respectively positioned in the receiving cavity by the corresponding limiting structures.

[0015] In summary, this utility model has the following beneficial effects:

[0016] When the motor starts, it generates an electromagnetic field through the conductor of the stator, driving the rotor to rotate. This, in turn, drives the drive shaft and pump impeller mounted on the rotor to rotate. Compared to existing transmission structures, this design offers higher transmission efficiency and lower energy consumption. Furthermore, the pump casing and connecting flange of the self-priming pump are integrated into a single unit, improving sealing performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the self-priming pump driven by a permanent magnet as described in this utility model.

[0018] Figure 2 This is a cross-sectional view of the self-priming pump driven by a permanent magnet as described in this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of the self-priming pump body described in this utility model. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with the illustrations and specific embodiments.

[0021] like Figures 1 to 3 As shown, the present invention proposes a self-priming pump driven by a permanent magnet, which includes a motor 1 and a self-priming pump body 2 that is connected to the motor 1 in a transmission.

[0022] The motor 1 includes a base 11, on which a motor housing is mounted. Inside the housing, there is a receiving cavity 12. At the bottom of the receiving cavity 12, there is a base 13. On the base 13, there is a stator 14 and a rotor 15. The stator 14 is distributed along the inner wall of the receiving cavity 12. The rotor 15 is located in the middle of the receiving cavity 12, and the outer side of the rotor 15 is surrounded by the stator 14. The end of the rotor 15 is connected to the self-priming pump body 2.

[0023] The self-priming pump body 2 includes a pump casing 21, a flow channel cavity 22 is provided inside the pump casing 21, a pump impeller 23 is provided inside the flow channel cavity 22, and a flow channel inlet 24 and a flow channel outlet 25 communicating with the flow channel cavity 22 are respectively provided on the pump casing 21. A connecting flange 26 is provided at the port of the flow channel outlet 25, and the connecting flange 26 is integrally connected to the pump casing 21.

[0024] The stator 14 includes a stator frame 141 fixedly mounted along the inner wall of the receiving cavity 12, and a coil 142 wound on the stator frame 141.

[0025] The rotor 15 includes a rotor frame 151 disposed within a stator frame 141. A permanent magnet 152 and a drive shaft 153 are disposed on the rotor frame 151. The outer side of the permanent magnet 152 is the coil 142 of the stator 14. The permanent magnet 152 is fixed by a limiting member 154 disposed at the end. The end of the drive shaft 153 extends out of the motor housing and is connected to the pump impeller 23 of the self-priming pump body 2.

[0026] The base 13 is provided with several limiting structures, and the bottoms of the stator frame 141 and the rotor frame 151 are respectively positioned in the receiving cavity 12 by the corresponding limiting structures.

[0027] The working principle of this utility model is as follows:

[0028] When the motor starts, it generates an electromagnetic field by conducting electricity through the stator 14, which drives the rotor 15 to rotate. This, in turn, drives the transmission shaft 153 and the pump impeller 23 mounted on the rotor 15 to rotate. Compared with the transmission structure in the prior art, this method has high transmission efficiency and low energy consumption. In addition, the pump casing 21 and the connecting flange 26 of the self-priming pump body 2 are connected in one piece, which improves the sealing performance.

[0029] In this document, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "vertical", and "horizontal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of clarifying the technical solution and for the convenience of description, and therefore should not be construed as limiting the present utility model.

[0030] In this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A self-priming pump driven by a permanent magnet, characterized by, The utility model relates to a self-priming pump motor, including motor (1), and with motor (1) transmission connection's self-priming pump body (2); The motor (1) includes a base (11), a motor outer shell is installed on the base (11), a containing cavity (12) is arranged in the inner part of the outer shell, a base (13) is arranged at the bottom of the containing cavity (12), a stator (14) and a rotor (15) are arranged on the base (13), the stator (14) is distributed along the inner wall of the containing cavity (12), the rotor (15) is arranged at the middle position of the containing cavity (12), and the outer side of the rotor (15) is surrounded by the stator (14), and the end of the rotor (15) is in transmission connection with the self-priming pump body (2); The self-priming pump body (2) includes a pump shell (21), a flow channel cavity (22) is arranged in the inner part of the pump shell (21), a pump impeller (23) is arranged in the inner part of the flow channel cavity (22), a flow channel inlet (24) and a flow channel outlet (25) in communication with the flow channel cavity (22) are arranged on the pump shell (21) respectively, and a connecting flange (26) is arranged at the port of the flow channel outlet (25), and the connecting flange (26) is integrally connected with the pump shell (21).

2. The self-priming pump driven with permanent magnets according to claim 1, characterized in that, The stator (14) includes a stator frame (141) fixedly installed along the inner wall of the containing cavity (12) and a coil (142) wound on the stator frame (141).

3. The self-priming pump driven with permanent magnets according to claim 2, characterized in that, The rotor (15) includes a rotor frame (151) arranged in the stator frame (141), a permanent magnet (152) and a transmission shaft (153) are arranged on the rotor frame (151), the outer side of the permanent magnet (152) is the coil (142) of the stator (14), the permanent magnet (152) is fixed through the limiting piece (154) arranged at the end, the end of the transmission shaft (153) extends out of the motor outer shell and is connected with the pump impeller (23) of the self-priming pump body (2).

4. The self-priming pump driven with permanent magnets according to claim 1, characterized in that, The base (13) is provided with a plurality of limiting structures, and the bottoms of the stator frame (141) and the rotor frame (151) are positioned in the containing cavity (12) through corresponding limiting structures respectively.

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