Connecting structure of motor and impeller in magnetic drive pump
By designing the coaxial setting and limiting structure of the impeller and rotor assembly in the magnetic pump, the eddy current problem caused by the gap between the impeller and the inner rotor is solved, the efficiency and assembly convenience of the pump are improved, and the smooth flow of fluid is ensured.
Patent Information
- Application Number
- CN202420403454.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-04
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-03-04
AI Technical Summary
In existing magnetic pumps, there is a gap between the impeller and the inner rotor assembly, causing fluid to flow back to form a eddy current, causing power loss and affecting pump efficiency.
Design a connection structure between the motor and the impeller in a magnetic pump. The impeller is arranged coaxially with the rotor assembly. The rear side of the impeller is closely attached to the front end surface of the rotor assembly. The installation is achieved through the limit structure and the convex columns, through holes and barbs. , avoid the formation of voids and ensure smooth flow of fluid.
Effectively avoiding the reflux of fluid into the formation of vortex between the impeller and the rotor assembly, improving the efficiency of the pump, simplifying the assembly steps and improving the stability of the structure.
Smart Images
Figure CN222228881U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of water pumps and relates to a magnetic pump, in particular to a connection structure between a motor and an impeller in a magnetic pump. Background Art
[0002] The magnetic pump is a new type of seal-free pump that uses the principle of permanent magnetic transmission technology to achieve contactless transmission of torque.
[0003] Existing magnetic pumps, such as a corrosion-resistant fluorine-lined magnetic vortex pump disclosed in the China Patent Library (application number: 202222419129.9), include a pump cover and a pump body that enclose a pump chamber, an isolation sleeve that encloses the outer side of the pump body to form an isolation chamber, a pump shaft that passes through the pump chamber and the isolation chamber, an impeller located in the pump chamber and arranged at one end of the pump shaft, an inner rotor assembly located in the isolation chamber and sleeved on the pump shaft, an outer rotor assembly arranged outside the isolation sleeve and opposite to the inner rotor assembly, and a drive motor drivingly connected to the outer rotor assembly; the inner wall of the pump chamber and the inner wall of the isolation chamber are both provided with fluorine sleeves.
[0004] In the above-mentioned magnetic vortex pump, there is a gap between the impeller and the front end of the inner rotor assembly. In actual use, when the fluid flowing back from the pump body outlet enters the above-mentioned gap, eddy currents will be generated, causing power loss and affecting the efficiency of the magnetic vortex pump. Utility Model Content
[0005] The purpose of the utility model is to solve the above problems in the existing technology and propose a connection structure between a motor and an impeller in a magnetic pump, so as to solve the technical problem of how to improve the efficiency.
[0006] The purpose of the utility model can be achieved through the following technical solutions: a connection structure between a motor and an impeller in a magnetic pump, comprising a motor and an impeller arranged on the front side of the motor, characterized in that the type of the motor is an external rotor motor, the motor comprises a rotor assembly which is cylindrical and is an injection-molded integral part, the impeller and the rotor assembly are coaxially arranged, the impeller is fixed on the rotor assembly, and the rear side surface of the impeller is tightly attached to the front end surface of the rotor assembly.
[0007] The present application only needs to place the rear side of the impeller tightly against the front end surface of the rotor assembly so that no gap is generated between the impeller and the rotor assembly, thereby effectively preventing the fluid from flowing back into the impeller and the rotor assembly to form eddy currents and cause losses. It has the advantages of simple structure and high efficiency.
[0008] In the above-mentioned magnetic pump impeller installation structure, the above-mentioned impeller is fixedly connected to the rotor assembly through a connecting assembly, and the connecting assembly is arranged on the rear side of the impeller to avoid hindering the flow of fluid and further improve efficiency.
[0009] In the connection structure of the motor and the impeller in the magnetic pump, the connection assembly includes a limiting structure and a circle of through holes axially penetrating the front end surface of the rotor assembly, and a convex column matching the through hole is formed on the rear side of the impeller. The number of the convex columns and the through holes is the same, and the convex columns are inserted into the corresponding through holes; the limiting structure is used to limit the forward movement of the impeller. The above design has the advantages of simple structure and convenient processing.
[0010] In the connection structure between the motor and the impeller in the magnetic pump, the limiting structure includes a barb formed on the rear side of the impeller and in a strip shape. The number of the barb is the same as the number of the through holes. The rear end of the barb passes through the corresponding through hole and is buckled on the rear edge of the corresponding through hole. With the cooperation of the convex column, the through hole and the barb, the impeller can be installed by simply pressing the impeller backwards, which effectively simplifies the assembly steps and has the advantages of simple structure and convenient assembly.
[0011] In the connection structure between the motor and the impeller in the above-mentioned magnetic pump, a notch is axially penetrated on one side of the protruding column, and each barb portion is arranged in the corresponding notch, so that the aperture of the through hole can be reduced to ensure the structural strength and stability of the rotor assembly.
[0012] As another solution, in the connection structure between the motor and the impeller in the above-mentioned magnetic pump, the limiting structure includes glue coated on the rear side of the impeller.
[0013] In the connection structure between the motor and the impeller in the above-mentioned magnetic pump, a convex ring is formed at the middle position of the rear side of the impeller, and an annular step matching the convex ring is formed on the front end surface of the rotor assembly, and the convex ring is stuck in the above-mentioned annular step to further enhance the positioning strength and stability of the impeller.
[0014] In the connection structure between the motor and the impeller in the magnetic pump, the protruding column and the barbed hook are both formed on the protruding ring.
[0015] Compared with the prior art, the connection structure between the motor and the impeller in the magnetic pump has the following advantages:
[0016] 1. The present application only needs to place the rear side of the impeller tightly against the front end surface of the rotor assembly so that there is no gap between the impeller and the rotor assembly, thereby effectively preventing the fluid from flowing back into the impeller and the rotor assembly to form eddy currents and cause losses. It has the advantages of simple structure and high efficiency.
[0017] 2. With the cooperation of the boss, the through hole and the barb, the impeller can be installed simply by pressing the impeller backwards, which effectively simplifies the assembly steps and has the advantages of simple structure and easy assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a cross-sectional schematic diagram of a magnetic pump.
[0019] Figure 2 yes Figure 1 A magnified schematic diagram of center A.
[0020] Figure 3 It is a three-dimensional schematic diagram of the connection between the motor and the impeller.
[0021] Figure 4 It is a three-dimensional schematic diagram of the impeller.
[0022] In the figure, 1, motor; 1a, rotor assembly; 1a1, annular step; 1a2, through hole; 2, impeller; 2a, boss; 2a1, notch; 2b, barb; 2c, convex ring. DETAILED DESCRIPTION
[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments. Embodiment 1
[0024] like Figure 1 and Figure 3 As shown, the connection structure between the motor and the impeller in the magnetic pump includes a motor 1 and an impeller 2 arranged at the front side of the motor 1 .
[0025] in,
[0026] The motor 1 is an external rotor motor, and includes a cylindrical rotor assembly 1a which is an injection-molded integral part. The specific structure of the rotor assembly 1a is known and will not be described in detail here. Figures 1 to 3 As shown, the impeller 2 and the rotor assembly 1a are coaxially arranged, the impeller 2 is fixed on the rotor assembly 1a, and the rear side of the impeller 2 is closely attached to the front end surface of the rotor assembly 1a.
[0027] The present application only needs to place the rear side of the impeller 2 tightly against the front end surface of the rotor assembly 1a so that no gap is generated between the impeller 2 and the rotor assembly 1a, thereby effectively preventing the fluid from flowing back into the impeller 2 and the rotor assembly 1a to form eddy currents and cause losses. The application has the advantages of simple structure and high efficiency.
[0028] It is further explained that the impeller 2 is fixedly connected to the rotor assembly 1a via a connecting assembly, and the connecting assembly is arranged on the rear side of the impeller 2 to avoid obstruction of fluid flow and further improve efficiency.
[0029] In this embodiment,
[0030] like Figure 1 , Figure 2 and Figure 4As shown, the connection assembly includes a limiting structure and a circle of through holes 1a2 axially penetrating the front end surface of the rotor assembly 1a. The limiting structure is used to limit the forward movement of the impeller 2; a boss 2a matching the through hole 1a2 is formed on the rear side of the impeller 2, and the axis of the boss 2a extends forward and backward. The number of bosses 2a and through holes 1a2 is the same, and the bosses 2a are inserted into the corresponding through holes 1a2. The above design has the advantages of simple structure and convenient processing.
[0031] The limiting structure includes a barb 2b formed on the rear side of the impeller 2 and in a strip shape, and the barb 2b extends forward and backward. The number of barbs 2b and through holes 1a2 is the same, and the rear end of the barb 2b passes through the corresponding through hole 1a2 and is buckled on the rear edge of the corresponding through hole 1a2. With the cooperation of the boss 2a, the through hole 1a2 and the barb 2b, the impeller 2 can be installed by simply pressing it backward, which effectively simplifies the assembly steps and has the advantages of simple structure and convenient assembly.
[0032] To further explain, a notch 2a1 is axially penetrated on one side of the boss 2a, and each barb portion 2b is disposed in the corresponding notch 2a1, so that the aperture of the through hole 1a2 can be reduced to ensure the structural strength and stability of the rotor assembly 1a.
[0033] like Figure 2 and Figure 4 As shown, a convex ring 2c is formed at the middle of the rear side of the impeller 2, and the convex column 2a and the barb 2b are both formed on the convex ring 2c. An annular step 1a1 matching the convex ring 2c is formed on the front end surface of the rotor assembly 1a, and the convex ring 2c is inserted into the annular step 1a1 to further enhance the positioning strength and stability of the impeller 2.
[0034] In the actual product, the impeller 2 is an injection-molded integral part. Embodiment 2
[0035] The structure and principle of the second embodiment are basically the same as those of the first embodiment, except that the limiting structure includes glue coated on the rear side of the impeller 2 .
[0036] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
Claims
1. A connection structure between a motor and an impeller in a magnetic pump, comprising a motor (1) and an impeller (2) arranged on the front side of the motor (1), characterized in that: The motor (1) is an external rotor motor, comprising a rotor assembly (1a) which is cylindrical and is an integral injection-molded part, an impeller (2) and the rotor assembly (1a) being coaxially arranged, the impeller (2) being fixed on the rotor assembly (1a), and the rear side surface of the impeller (2) being closely attached to the front end surface of the rotor assembly (1a).
2. The connection structure between the motor and the impeller in the magnetic pump according to claim 1, characterized in that: The impeller (2) is fixedly connected to the rotor assembly (1a) via a connecting assembly, and the connecting assembly is arranged on the rear side of the impeller (2).
3. The connection structure between the motor and the impeller in the magnetic pump according to claim 2, characterized in that: The connection assembly comprises a limiting structure and a circle of through holes (1a2) axially penetrating the front end surface of the rotor assembly (1a); a convex column (2a) matching the through holes (1a2) is formed on the rear side surface of the impeller (2); the number of the convex columns (2a) and the number of the through holes (1a2) are the same, and the convex columns (2a) are inserted into the corresponding through holes (1a2); the limiting structure is used to limit the forward movement of the impeller (2).
4. The connection structure between the motor and the impeller in the magnetic pump according to claim 3, characterized in that: The limiting structure comprises a barbed portion (2b) formed on the rear side of the impeller (2) and in a strip shape, the barbed portion (2b) and the through holes (1a2) having the same number, and the rear end of the barbed portion (2b) passes through the corresponding through hole (1a2) and is buckled on the rear hole edge of the corresponding through hole (1a2).
5. The connection structure between the motor and the impeller in the magnetic pump according to claim 4, characterized in that: A notch (2a1) is axially penetrated through one side of the protruding column (2a), and each barb portion (2b) is arranged in a corresponding notch (2a1).
6. The connection structure between the motor and the impeller in the magnetic pump according to claim 3, characterized in that: The limiting structure comprises glue coated on the rear side of the impeller (2).
7. The connection structure between the motor and the impeller in the magnetic pump according to claim 4, characterized in that: A convex ring (2c) is formed at the middle position of the rear side surface of the impeller (2), and an annular step (1a1) matching the convex ring (2c) is formed on the front end surface of the rotor assembly (1a), and the convex ring (2c) is inserted into the annular step (1a1).
8. The connection structure between the motor and the impeller in the magnetic pump according to claim 7, characterized in that: The above-mentioned convex column (2a) and barbed hook portion (2b) are both formed on the convex ring (2c).