An impeller clamping device

Abstract

This utility model provides an impeller clamping device, which includes a clamping component, a first movable sleeve, a second movable sleeve, and an elastic element. The clamping component includes a body and a plurality of jaws evenly distributed along its circumference. The first movable sleeve and the elastic element are disposed inside the body. The end of the first movable sleeve near the jaws has a first protrusion that gradually expands radially outward. The second movable sleeve is sleeved outside the body and connected to the first movable sleeve through a connector. When an external force is applied to the second movable sleeve, it can drive the first movable sleeve to compress the elastic element and move away from the jaws, and the first protrusion causes the jaws to open radially. After the external force disappears, under the action of the elastic element, the first and second movable sleeves return to their original positions, and the jaws fit against the impeller flow channel to clamp the impeller. In this way, the clamping and release of the impeller can be achieved. During the clamping process, the impeller is subjected to uniform circumferential force, which can avoid impeller deflection or collision caused by magnetic force.

Description

Technical Field

[0001] This application relates to the field of centrifugal pump equipment technology, and in particular to an impeller clamping device. Background Technology

[0002] As a high-efficiency, frictionless fluid transport device, the magnetic levitation bearingless pump uses a core component, the impeller, which contains a permanent magnet. The magnetic coupling between the permanent magnet and the motor stator core enables contactless drive. In actual production and use, there is a need for rapid impeller disassembly and assembly. During this process, the magnetic force between the permanent magnet and the motor stator core causes the impeller to deflect or collide. Furthermore, as the pump power increases, the magnetic force between the permanent magnet and the stator core also increases. Traditional manual disassembly and assembly requires overcoming significant magnetic resistance, easily leading to impeller misalignment and collisions, damaging the pump casing or impeller, and even causing safety accidents. Utility Model Content

[0003] To address the aforementioned technical problems, this application provides an impeller clamping device, comprising a clamping component, a first movable sleeve, a second movable sleeve, and an elastic element; the clamping component includes a body and a plurality of jaws evenly distributed circumferentially thereon; the body is a hollow cylindrical structure; the first movable sleeve and the elastic element are disposed inside the body; a first protrusion that gradually expands radially is formed at one end of the first movable sleeve near the jaws; the second movable sleeve is sleeved outside the body and connected to the first movable sleeve via a connector; when an external force is applied to the second movable sleeve, the first movable sleeve can be driven to compress the elastic element and move away from the jaws, and the first protrusion causes the jaws to open radially.

[0004] In some embodiments of this application, the main body is provided with a sliding groove, the connector passes through the sliding groove and extends out of the outer peripheral surface of the second movable sleeve, and the portion of the connector extending out of the second movable sleeve forms a first gripping part.

[0005] In some embodiments of this application, a second gripping portion is further provided at the end of the body away from the gripper.

[0006] In some embodiments of this application, a second protrusion is formed on the outer periphery of the body near the gripper, and the second protrusion has an inclined guide surface that connects to the outer peripheral surface of the body.

[0007] In some embodiments of this application, the gripper includes a tapered gripper body and a hook-shaped portion extending axially along its end face.

[0008] In some embodiments of this application, the hook-shaped portion includes a first portion and a second portion disposed on the circumferential inner wall of the first portion. The second portion extends toward the gripper body and gradually protrudes from the circumferential inner wall of the first portion. The circumferential inner wall of the first portion and the end face of the second portion enclose a space for accommodating the impeller end cap.

[0009] In some embodiments of this application, the outer peripheral surface of the second movable sleeve is recessed to form an annular anti-slip groove; multiple anti-slip grooves are arranged at intervals along the axial direction.

[0010] In some embodiments of this application, the interior of the first movable sleeve forms a blind hole with an opening facing the first boss; the end face of the first movable sleeve is recessed to form a groove, and the end of the elastic element abuts in the groove.

[0011] In some embodiments of this application, a first hole and a second hole are formed inside the body, the diameter of the first hole is larger than the diameter of the second hole; the first movable sleeve is capable of axial reciprocating within the first hole.

[0012] In some embodiments of this application, the elastic element is a spring.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects: The impeller clamping device of this application includes a clamping component, a first movable sleeve, a second movable sleeve, and an elastic element; the clamping component includes a body and a plurality of jaws evenly distributed along its circumference; the first movable sleeve and the elastic element are disposed inside the body; a first protrusion that gradually expands radially is formed at the end of the first movable sleeve near the jaws; the second movable sleeve is sleeved outside the body and connected to the first movable sleeve through a connector; when an external force is applied to the second movable sleeve, it can drive the first movable sleeve to compress the elastic element and move away from the jaws, and the first protrusion causes the jaws to open radially to cover the impeller; after the external force disappears, under the action of the elastic element, the first and second movable sleeves are reset, and the jaws fit against the impeller flow channel to achieve clamping of the impeller; thus, the clamping device can achieve clamping and releasing of the impeller; the jaws fit against the impeller flow channel to clamp the impeller, and the circumferentially covers the impeller, so that the impeller is subjected to uniform force in the circumferential direction, which can avoid impeller deflection or collision caused by magnetic force.

[0014] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit this document. Attached Figure Description

[0015] The accompanying drawings, which form part of this document, are used to provide a further understanding of the document. The illustrative embodiments and descriptions herein are used to explain the document and do not constitute an undue limitation thereof. In the drawings: Figure 1This is a schematic diagram of the structure of an impeller clamping device provided in an exemplary embodiment of this application; Figure 2 This is a front view of an exemplary embodiment of the impeller gripping device provided in this application; Figure 3 yes Figure 2 Sectional view at point AA; Figure 4 This is a schematic diagram of the structure of an impeller clamping device (impeller clamping device) provided in an exemplary embodiment of this application.

[0016] In the picture: 10A, Impeller; 11, Gripping component; 111, Body; 112, Gripper; 1121, Gripper body; 1122, Hook-shaped part; 1122a, First part; 1122b, Second part; 113, Second boss; 114, First hole; 115, Second hole; 12, Second movable sleeve; 13, First movable sleeve; 131, First boss; 14, Elastic element; 15, Connector; 16, Second gripping part. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0018] As a high-efficiency, frictionless fluid transport device, the magnetic levitation bearingless pump uses a core component, the impeller, which contains a permanent magnet. The magnetic coupling between the permanent magnet and the motor stator core enables contactless drive. In actual production and use, there is a need for rapid impeller disassembly and assembly. During this process, the magnetic force between the permanent magnet and the motor stator core causes the impeller to deflect or collide. Furthermore, as the pump power increases, the magnetic force between the permanent magnet and the stator core also increases. Traditional manual disassembly and assembly requires overcoming significant magnetic resistance, easily leading to impeller misalignment and collisions, damaging the pump casing or impeller, and even causing safety accidents.

[0019] Based on this, an exemplary embodiment of this application provides an impeller clamping device, which includes a clamping component, a first movable sleeve, a second movable sleeve, and an elastic element. The clamping component includes a body and a plurality of jaws evenly distributed circumferentially thereon. The first movable sleeve and the elastic element are disposed inside the body. A first protrusion that gradually expands radially is formed at one end of the first movable sleeve near the jaws. The second movable sleeve is sleeved outside the body and connected to the first movable sleeve by a connector. When an external force is applied to the second movable sleeve, it can drive the first movable sleeve to compress the elastic element and move away from the jaws. The first protrusion causes the jaws to open radially to cover the impeller. After the external force disappears, under the action of the elastic element, the first and second movable sleeves return to their original positions, and the jaws fit against the impeller flow channel to clamp the impeller. Thus, the clamping device can clamp and release the impeller. The jaws fit against the impeller flow channel to clamp the impeller and circumferentially cover the impeller, so that the impeller is subjected to uniform force in the circumferential direction, which can avoid impeller deflection or collision caused by magnetic force.

[0020] An exemplary embodiment of this application provides an impeller clamping device, such as... Figures 1 to 4 As shown, the impeller clamping device includes a clamping component 11, a first movable sleeve 13, a second movable sleeve 12, and an elastic element 14. The clamping component 11 includes a body 111 and a plurality of jaws 112 evenly distributed circumferentially therebetween. A gap is formed between every two jaws 112, and the gap extends toward the body 111 to the middle of the body 111. The body 111 has a hollow columnar structure. A second boss 113 is formed on the outer periphery of the body 111 near the jaws 112. The second boss 113 has an inclined guide surface that connects to the outer peripheral surface of the body 111. Figure 3 As shown, the first movable sleeve 13 is in the initial position, at which time the gripper 112 is in a radially retracted state.

[0021] The first movable sleeve 13 and the elastic element 14 are disposed inside the body 111. For example, the body 111 has a first hole 114 and a second hole 115 that are interconnected. Preferably, the diameter of the first hole 114 is larger than the diameter of the second hole 115. The first movable sleeve 13 is disposed in the first hole 114, and the elastic element 14 is disposed in the second hole 115. The elastic element 14 is a spring. Under the action of external force, the first movable sleeve 13 can reciprocate axially within the first hole 114. When the first movable sleeve 13 moves toward the elastic element 14, it can compress the elastic element 14. After the external force disappears, the first movable sleeve 13 returns to its initial position under the action of the elastic element 14. The second boss 113 cooperates with the first movable sleeve 13 to limit the radial opening of the gripper 112.

[0022] like Figure 3As shown, the first movable sleeve 13 has a first boss 131 that gradually expands radially at one end near the gripper 112. The first boss 131 has an inclined expansion surface that connects to the first movable sleeve 13. Under the action of external force, the expansion surface of the first boss 131 contacts the inner wall of the body 111. As the first movable sleeve 13 continues to move toward the elastic element 14, the expansion surface of the first boss 131 continuously squeezes the inner wall of the body 111, causing the gripper 112 to open radially. At this time, the diameter of the space formed by each gripper 12 is larger than the diameter of the impeller 10A, and can cover one end of the impeller 10A.

[0023] The interior of the first movable sleeve 13 forms a blind hole with an opening facing the first boss 131 to reduce the overall weight of the device; the end face of the first movable sleeve 13 is recessed to form a groove, and the end of the elastic element 14 abuts in the groove.

[0024] The second movable sleeve 12 is fitted outside the main body 111 and connected to the first movable sleeve 13 via a connector 15. The main body 111 has a groove through which the connector 15 passes to connect the first movable sleeve 13 and the second movable sleeve 12. Preferably, the groove communicates with the gap between the gripper 114 and the first movable sleeve 12. When an external force is applied to the second movable sleeve 12, it can drive the first movable sleeve 13 to compress the elastic element 14 and move it away from the gripper 112, causing the first boss 131 to open the gripper 112 radially.

[0025] like Figure 1 and 2 As shown, the gripper 112 includes a conical gripper body 1121 and a hook-shaped portion 1122 extending axially along its end face. The hook-shaped portion 1122 includes a first portion 1122a and a second portion 1122b disposed on the circumferential inner wall of the first portion 1122a. The second portion 1122b extends toward the gripper body 1121 and gradually protrudes beyond the circumferential inner wall of the first portion 1122a. The circumferential inner wall of the first portion 1122a and the end face of the second portion 1122b enclose a space for accommodating the end cap of the impeller 10A. When gripping the impeller 10A, the inner wall of the first portion 1122a can abut against the outer circumferential surface of the end cap of the impeller 10A, and the end of the second portion 1122b can abut against the bottom surface of the end cap of the impeller 10A, thereby achieving the gripping of the impeller 10A.

[0026] In one exemplary embodiment, for ease of operation, the connector 15 passes through a groove and extends out of the outer peripheral surface of the second movable sleeve 12, with the portion of the connector 15 extending out of the second movable sleeve 12 forming a first gripping portion. A second gripping portion 16 is also provided at the end of the body 111 away from the gripper 112. When force is applied, the first gripping portion and the second gripping portion 16 can be gripped simultaneously, causing the first gripping portion to move towards the second gripping portion 16, thereby driving the second movable sleeve 12 and the first movable sleeve 13 to move. The outer peripheral surface of the second movable sleeve 12 is concave to form an annular anti-slip groove; multiple anti-slip grooves are arranged at intervals along the axial direction.

[0027] The operation of using the impeller gripping device of this application to grip the impeller 10A is as follows: Simultaneously grip the first gripping part and the second gripping part 16, apply force to make the first gripping part move towards the second gripping part 16, thereby driving the second movable sleeve 12 and the first movable sleeve 13 to move away from the gripper 112. The second movable sleeve 12 separates from the second boss 113, releasing the radial limit on the gripper 112. The first movable sleeve 13 continues to move, and the expanding surface of the first boss 131 causes the gripper 112 to move in the radial direction, making the diameter of the gripping space formed by the gripper 112 larger. Align the device with the impeller 10A to be gripped, so that the gripper 112 aligns with each flow channel opening of the impeller 10A. Then release the force applied to the first gripping part. Under the action of the elastic element 114, the second movable sleeve 12 and the first movable sleeve 13 return to the initial position, and the gripper 112 fits tightly with the end cap of the impeller 10A, gripping the impeller 10A. At this point, grasp the second gripping part 16 and apply force in the direction of pulling out the impeller 10A, causing the impeller 10A to detach from the motor. After the impeller 10A detaches from the motor, the above process can be repeated to separate the impeller 10A from the device.

[0028] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0029] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0030] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, the intent of this application also includes these modifications and variations.

Claims

1. An impeller clamping device, characterized in that, The device includes a clamping component (11), a first movable sleeve (13), a second movable sleeve (12), and an elastic element (14). The clamping component (11) includes a body (111) and a plurality of claws (112) evenly distributed along its circumference. The body (111) is a hollow columnar structure. The first movable sleeve (13) and the elastic element (14) are disposed inside the body (111). The first movable sleeve (13) has a first boss (131) that gradually expands radially at one end near the claws (112). The second movable sleeve (12) is sleeved on the body (111) and connected to the first movable sleeve (13) through a connector (15). When an external force is applied to the second movable sleeve (12), the first movable sleeve (13) can be driven to compress the elastic element (14) and move away from the claws (112). The first boss (131) causes the claws (112) to open radially.

2. The impeller clamping device according to claim 1, characterized in that, The main body (111) is provided with a sliding groove, and the connector (15) passes through the sliding groove and extends out of the outer peripheral surface of the second movable sleeve (12). The connector (15) extending out of the second movable sleeve (12) forms a first gripping part.

3. The impeller clamping device according to claim 2, characterized in that, The end of the body (111) away from the gripper (112) is also provided with a second gripping part (16).

4. The impeller clamping device according to claim 1, characterized in that, A second boss (113) is formed on the outer periphery of the body (111) near the gripper (112), and the second boss (113) has an inclined guide surface that connects to the outer periphery of the body (111).

5. The impeller clamping device according to claim 1, characterized in that, The gripper (112) includes a tapered gripper body (1121) and a hook-shaped portion (1122) extending axially along its end face.

6. The impeller clamping device according to claim 5, characterized in that, The hook-shaped portion (1122) includes a first portion (1122a) and a second portion (1122b) disposed on the circumferential inner wall of the first portion (1122a). The second portion (1122b) extends toward the gripper body (1121) and gradually protrudes from the circumferential inner wall of the first portion (1122a). The circumferential inner wall of the first portion (1122a) and the end face of the second portion (1122b) enclose a space for accommodating the impeller end cap.

7. The impeller clamping device according to any one of claims 1 to 6, characterized in that, The outer circumferential surface of the second movable sleeve (12) is concave to form an annular anti-slip groove; multiple anti-slip grooves are arranged at intervals along the axial direction.

8. The impeller clamping device according to any one of claims 1 to 6, characterized in that, The interior of the first movable sleeve (13) forms a blind hole with an opening facing the first boss (131); the end face of the first movable sleeve (13) is recessed to form a groove, and the end of the elastic element (14) abuts in the groove.

9. The impeller clamping device according to claim 1, characterized in that, The body (111) has a first hole (114) and a second hole (115) that are interconnected inside. The diameter of the first hole (114) is larger than the diameter of the second hole (115). The first movable sleeve (13) can reciprocate axially within the first hole (114).

10. The impeller clamping device according to claim 1, characterized in that, The elastic element (14) is a spring.

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