Magnetic drive pump impeller mounting structure

Abstract

The utility model provides a magnetic drive pump impeller mounting structure, and belongs to the technical field of water pumps. The problem that an existing magnetic pump impeller is inconvenient to install is solved. The magnetic drive pump comprises a motor, an impeller is elastic and arranged on the front side of the motor, the installation structure comprises a connecting pipe formed on the rear side face of the impeller, and the connecting pipe and an inlet of the impeller are coaxially arranged. The impeller sleeves the front end of a rotor of the motor, a key groove is axially formed in the outer wall of the front end of the rotor, a key block matched with the key groove is formed on the inner wall of the connecting pipe, and the key block is inserted into the key groove; an annular clamping groove is further coaxially formed in the outer wall of the front end of the rotor, buckles matched with the annular clamping groove are further formed on the inner wall of the connecting pipe, the number of the buckles is at least two, the buckles are evenly distributed in the circumferential direction of the impeller, and the buckles are buckled in the annular clamping groove. The magnetic drive pump impeller installation structure facilitates impeller installation.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps and relates to a magnetic pump, in particular to an impeller installation structure of a magnetic pump. Background Art

[0002] A magnetic pump is a pump that uses magnetic transmission technology to achieve contactless torque transmission. It has a wide range of applications and is mainly suitable for conveying flammable, explosive, volatile, toxic, corrosive and precious liquids. It is particularly suitable for situations where the pump is required to have only slight leakage or even no leakage, as well as high vacuum situations where mechanical seals are difficult to handle.

[0003] Existing magnetic pumps, such as a magnetic pump disclosed in the Chinese Patent Library (application number: 202310798539.5), include a pump body and a drive motor, the pump body includes a pump casing, the inner cavity of the pump casing is a pump cavity, the axial direction of the pump cavity is defined as the front-to-back direction, and the drive motor is connected to the front end of the pump body, and an external magnetic rotor, an isolation cover, a positioning pump shaft and a composite impeller are arranged in the pump casing; the isolation cover is fixedly arranged in the pump cavity, and a sealing ring is arranged at the gap between the isolation cover and the pump casing, a circular groove is arranged at the center of the rear end surface of the isolation cover, and the rear end of the pump casing is liquid inlet. A bracket is arranged at the opening, and a circular hole is opened in the bracket. The front end limit of the positioning pump shaft is installed in the circular groove, and the rear end limit is installed in the circular hole to form a simply supported beam structure, and the central axis of the positioning pump shaft is colinear with the central axis of the pump chamber; the outer magnetic rotor and the composite impeller are respectively located on the front and rear sides of the isolation cover, and the output shaft of the drive motor is fixedly connected to the outer magnetic rotor; the rear end of the outer magnetic rotor is provided with an outer magnetic ring, the front end of the composite impeller is provided with an inner magnetic ring corresponding to the outer magnetic ring, and the composite impeller is installed on the positioning pump shaft through the bearing.

[0004] In the above-mentioned magnetic pump, the impeller is ring-shaped and is inserted into the rotor, and the impeller is locked by screws, which causes problems such as complicated and inconvenient assembly. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a magnetic pump impeller installation structure which is convenient for impeller installation.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a magnetic pump impeller mounting structure, the magnetic pump includes a motor, the impeller is elastic and is arranged on the front side of the motor, and is characterized in that the mounting structure includes a connecting pipe formed on the rear side of the impeller, and the connecting pipe is coaxially arranged with the impeller inlet; the impeller is sleeved on the front end of the rotor of the motor, a key slot is axially opened on the outer wall of the front end of the rotor, a key block matching the key slot is formed on the inner wall of the connecting pipe, and the key block is inserted in the key slot; an annular groove is also coaxially provided on the outer wall of the front end of the rotor, and a buckle matching the annular groove is also formed on the inner wall of the connecting pipe, there are at least two buckles and they are evenly distributed along the circumference of the impeller, and the buckle is buckled in the annular groove.

[0007] During installation, press the impeller firmly along the rotor axis so that the buckle fits into the annular groove to stably connect the rotor and impeller.

[0008] With the cooperation of the buckle and the annular groove as well as the key block and the key groove, the impeller can be stably connected to the rotor by simply pressing it in hard. Not only is it easy to install, but the above-mentioned parts are all directly formed on the impeller or rotor, without the need for other parts, and the structure is relatively simple.

[0009] In the above-mentioned magnetic pump impeller installation structure, the above-mentioned rotor is formed into a whole by injection molding, which is convenient for processing and assembly.

[0010] In the above-mentioned magnetic pump impeller installation structure, there are two keyways which are symmetrically arranged along the center of the rotor, and the above-mentioned key block is inserted into each keyway to enhance the circumferential matching strength between the impeller and the rotor, so that the impeller rotates more stably.

[0011] In the above-mentioned magnetic pump impeller mounting structure, the rear end of the keyway passes through the annular clamping groove to divide the annular clamping groove into two arc segments, and at least one of the above-mentioned buckles is buckled in each of the two arc segments. In this way, in actual design, the key block and the keyway cooperate to achieve the circumferential connection between the impeller and the rotor, and serve as an impeller insertion guide, which is convenient for assembly.

[0012] In the above-mentioned magnetic pump impeller installation structure, both ends of the connecting pipe are open, and an escape groove is axially penetrated on the inner wall of the connecting pipe. The buckle is formed on the inner wall of the escape groove, and the number of the buckle and the escape groove are the same and the positions correspond one to one. The escape groove provides a larger deformation space for the buckle, making it easier to press the impeller in.

[0013] In the above-mentioned magnetic pump impeller mounting structure, the buckle and the avoidance groove are both in the shape of an arc coaxial with the rotor, and the arc length of the buckle is smaller than the arc length of the avoidance groove, so as to greatly increase the contact area between the buckle and the annular buckle groove and form a stronger axial limit.

[0014] In the above-mentioned magnetic pump impeller mounting structure, an arc strip is coaxially formed in the avoidance groove, and the two ends of the arc strip extend to the two end surfaces of the avoidance groove respectively. There is a gap between the outer side surface of the arc strip and the bottom surface of the avoidance groove, and the buckle is formed on the inner side surface of the corresponding arc strip. This not only makes it easier for the buckle to deform and fit into the annular groove, which is conducive to assembly, but also provides better support for the buckle, allowing it to be more stably stuck in the annular groove.

[0015] In the above-mentioned magnetic pump impeller installation structure, the impeller is made of plastic material.

[0016] In the above-mentioned magnetic pump impeller installation structure, the connecting pipe and the impeller are integrally formed by injection molding.

[0017] Compared with the prior art, the magnetic pump impeller installation structure has the following advantages:

[0018] 1. With the cooperation of the buckle, the annular groove, the key block and the key groove, the impeller can be stably connected to the rotor by simply pressing it hard. It is not only easy to install, but the above-mentioned parts are directly formed on the impeller or rotor, without the need for other parts, and the structure is relatively simple.

[0019] 2. The key block and keyway cooperate to realize the circumferential connection between the impeller and the rotor, and also serve as a guide for the impeller insertion, which not only further simplifies the structure but also facilitates assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the connection between the motor and the impeller.

[0021] Figure 2 It is a cross-sectional diagram of the connection between the motor and the impeller.

[0022] Figure 3 It is a three-dimensional schematic diagram of the rotor.

[0023] Figure 4 It is a three-dimensional schematic diagram of the impeller.

[0024] Figure 5 It is a cross-sectional schematic diagram of the impeller.

[0025] In the figure, 1, motor; 1a, rotor; 1a1, keyway; 1a2, annular groove; 1b, limit surface; 2, impeller; 2a, key block; 2b, buckle; 2c, avoidance groove; 2d, arc strip; 2e, connecting pipe. DETAILED DESCRIPTION

[0026] 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.

[0027] like Figure 1As shown, the magnetic pump includes a motor 1, and the motor 1 includes a rotor 1a.

[0028] As Figure 1 , Figure 2 and Figure 3 shown, the impeller 2 is elastic and is generally made of plastic material. The impeller 2 is arranged on the front side of the motor 1. The impeller mounting structure of this magnetic pump includes a connecting pipe 2e formed on the rear side surface of the impeller 2, and the connecting pipe 2e is coaxially arranged with the inlet of the impeller 2. The impeller 2 is sleeved on the front end of the rotor 1a of the motor 1. An axial keyway 1a1 is formed on the outer wall of the front end of the rotor 1a, and the front end of the keyway 1a1 is open. A key block 2a matching the keyway 1a1 is formed on the inner wall of the connecting pipe 2e, and the key block 2a is inserted into the keyway 1a1. An annular clamping groove 1a2 is also coaxially arranged on the outer wall of the front end of the rotor 1a, and the axial cross-section of the annular clamping groove 1a2 is generally U-shaped. A clamping buckle 2b matching the annular clamping groove 1a2 is also formed on the inner wall of the connecting pipe 2e. There are at least two clamping buckles 2b and they are evenly distributed along the circumferential direction of the impeller 2, and the clamping buckle 2b is buckled in the annular clamping groove 1a2. During installation, press the impeller 2 axially along the rotor 1a with force to make the clamping buckle 2b buckle into the annular clamping groove 1a2, so as to stably connect the rotor 1a and the impeller 2.

[0029] With the cooperation of the clamping buckle 2b and the annular clamping groove 1a2 and the key block 2a and the keyway 1a1, the impeller 2 can be stably connected to the rotor 1a by simply pressing it in with force. It is not only convenient for installation, but also the above-mentioned components are directly formed on the impeller 2 or the rotor 1a, without the need to rely on other components, and the structure is relatively simple.

[0030] In this embodiment,

[0031] the rotor 1a is formed as a whole by injection molding; the connecting pipe 2e and the impeller 2 are integrally formed by injection molding.

[0032] The number of keyways 1a1 is 2 and they are symmetrically arranged along the center of the rotor 1a. Each keyway 1a1 is inserted with the above-mentioned key block 2a to strengthen the circumferential cooperation strength between the impeller 2 and the rotor 1a and make the impeller 2 rotate more stably.

[0033] Furthermore, the rear end of the keyway 1a1 passes through the annular clamping groove 1a2 to divide the annular clamping groove 1a2 into two arc segments. That is, at this time, the arc segments and the keyway 1a1 are alternately distributed along the circumferential direction of the rotor 1a. At least one of the above-mentioned clamping buckles 2b is buckled in each of the two arc segments. In actual design, the cooperation of the key block 2a and the keyway 1a1 not only realizes the circumferential connection between the impeller 2 and the rotor 1a, but also plays a role in guiding the insertion of the impeller 2, which is beneficial to assembly. In actual products, the number of clamping buckles 2b is also 2.

[0034] Furthermore, as Figures 3 to 5As shown, both ends of the connecting pipe 2e are open, and an avoidance groove 2c is axially penetrated on the inner wall of the connecting pipe 2e. The buckle 2b is formed on the inner wall of the avoidance groove 2c, and the buckle 2b and the avoidance groove 2c are the same in number and the positions correspond one to one. The avoidance groove 2c provides a larger deformation space for the buckle 2b, so that the impeller 2 is easier to press in. Preferably, the buckle 2b and the avoidance groove 2c are both in the shape of a circular arc coaxial with the rotor 1a, and the arc length of the buckle 2b is smaller than the arc length of the avoidance groove 2c, so as to greatly increase the contact area between the buckle 2b and the annular groove 1a2, forming a stronger axial limit.

[0035] like Figure 4 and Figure 5 As shown, an arc strip 2d is coaxially formed in the avoidance groove 2c, and the two ends of the arc strip 2d extend to the two end surfaces of the avoidance groove 2c respectively. There is a gap between the outer side surface of the arc strip 2d and the bottom surface of the avoidance groove 2c, and the buckle 2b is formed on the inner side surface of the corresponding arc strip 2d. This not only makes it easier for the buckle 2b to deform and fit into the annular groove 1a2, which is conducive to assembly, but also provides better support for the buckle 2b, allowing it to be more stably stuck in the annular groove 1a2.

[0036] In the actual product, an annular limiting surface 1b is formed on the front end side wall of the rotor 1a. The limiting surface 1b is coaxially arranged with the rotating shaft, and the rear end surface of the connecting pipe 2e is pressed on the limiting surface 1b, which is used for limiting the installation of the impeller 2, further facilitating assembly.

[0037] 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 magnetic pump impeller mounting structure, the magnetic pump comprising a motor (1), an impeller (2) having elasticity and arranged on the front side of the motor (1), characterized in that: The installation structure comprises a connecting pipe (2e) formed on the rear side of the impeller (2), and the connecting pipe (2e) is coaxially arranged with the inlet of the impeller (2); the impeller (2) is sleeved on the front end of the rotor (1a) of the motor (1), a keyway (1a1) is axially opened on the outer wall of the front end of the rotor (1a), a key block (2a) matching the keyway (1a1) is formed on the inner wall of the connecting pipe (2e), and the key block (2a) is inserted into the keyway (1a1); an annular groove (1a2) is coaxially provided on the outer wall of the front end of the rotor (1a), and a buckle (2b) matching the annular groove (1a2) is formed on the inner wall of the connecting pipe (2e), there are at least two buckles (2b) and they are evenly distributed along the circumference of the impeller (2), and the buckle (2b) is buckled in the annular groove (1a2).

2. The magnetic pump impeller installation structure according to claim 1, characterized in that: The rotor (1a) is formed as a whole by injection molding.

3. The magnetic pump impeller installation structure according to claim 1 or 2, characterized in that: There are two key slots (1a1) which are symmetrically arranged along the center of the rotor (1a), and the key block (2a) is inserted into each key slot (1a1).

4. The magnetic pump impeller installation structure according to claim 3, characterized in that: The rear end of the keyway (1a1) passes through the annular clamping groove (1a2) to divide the annular clamping groove (1a2) into two arc segments, and at least one of the above-mentioned clamps (2b) is buckled in each of the two arc segments.

5. The magnetic pump impeller installation structure according to claim 4, characterized in that: Both ends of the connecting pipe (2e) are open, an avoidance groove (2c) is axially penetrated on the inner wall of the connecting pipe (2e), the buckle (2b) is formed on the inner wall of the avoidance groove (2c), and the buckle (2b) and the avoidance groove (2c) are the same in number and have one-to-one corresponding positions.

6. The magnetic pump impeller installation structure according to claim 5, characterized in that: The buckle (2b) and the avoidance groove (2c) are both in the shape of an arc coaxial with the rotor (1a), and the arc length of the buckle (2b) is smaller than the arc length of the avoidance groove (2c).

7. The magnetic pump impeller installation structure according to claim 6, characterized in that: An arc strip (2d) is coaxially formed in the avoidance groove (2c), and two ends of the arc strip (2d) extend to two end surfaces of the avoidance groove (2c) respectively, a gap exists between the outer side surface of the arc strip (2d) and the bottom surface of the avoidance groove (2c), and the buckle (2b) is formed on the inner side surface of the corresponding arc strip (2d).

8. The magnetic pump impeller installation structure according to claim 1, characterized in that: The impeller (2) is made of plastic material.

9. The magnetic pump impeller installation structure according to claim 8, characterized in that: The connecting pipe (2e) and the impeller (2) are integrally formed by injection molding.

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