A scroll pump and a scroll plate

Abstract

The application relates to the technical field of scroll pumps, in particular to a movable scroll disc and a scroll pump. The movable scroll disc comprises a disc body, the center of the disc body is provided with a hub, the hub is provided with a connecting part used for interference fit with a bearing, and a stress release structure is arranged on the radial outer side of the connecting part. Through arrangement of the stress release structure on the radial outer side of the connecting part, assembly stress can be effectively absorbed and isolated, most of the deformation energy can be concentrated in the stress release structure area, so that stress transmission to the main part of the disc body is blocked, and the disc body is prevented from being twisted and deformed.

Description

Technical Field

[0001] This utility model relates to the field of vortex pump technology, and in particular to a moving vortex disk and a vortex pump. Background Technology

[0002] A vortex pump is mainly composed of a moving vortex disk, a stationary vortex disk, a crankshaft, an anti-rotation mechanism, and a drive motor. It is a type of pump that relies on the relative motion of the moving and stationary vortex disks to achieve the processes of air intake, compression, and exhaust. It features a compact structure, stable operation, high efficiency, and high cleanliness, and is widely used in vacuum acquisition, fluid transportation, and other fields.

[0003] The moving and stationary scroll plates are the core components, their profiles are conjugate and they are assembled in an interlaced manner to form the working chamber. Driven by the crankshaft, the moving scroll plate performs a translational rotation around the stationary scroll plate. The scroll profiles of the moving and stationary plates mesh with each other, forming a series of crescent-shaped closed spaces. Gas enters through the intake port, and as the moving plate moves, the volume of the closed space gradually decreases, and the gas is continuously compressed. When the pressure reaches the exhaust pressure, the gas is discharged through the exhaust port.

[0004] The moving scroll plate is typically designed as an eccentrically arranged disc-shaped structure with grooves formed by scroll profiles along its edges. This disc rotates eccentrically within the stationary disc, and the two work together to form a sealed cavity, propelling the fluid from the suction side to the discharge side. The moving scroll plate is supported by bearings, which provide rigid support to ensure stability during high-speed operation, preventing tilting, shifting, or vibration.

[0005] Currently, bearings and moving scroll plates are mostly connected using an interference fit. During assembly, the moving scroll plate is usually heated to expand its bore diameter, and then cooled after the bearing is installed to achieve a tight fit. However, some moving scroll plates cannot fully return to their original dimensions after cooling, resulting in deformation after the fit. Utility Model Content

[0006] This disclosure addresses the technical problem that existing moving scroll disks are prone to deformation when assembled with bearings using an interference fit, and proposes a novel moving scroll disk that can effectively suppress or avoid deformation during the interference fit process.

[0007] The technical solution adopted by this disclosure to solve the above-mentioned technical problem is as follows: a dynamic scroll disk, including a disk body, a hub is provided at the center of the disk body, a connecting part for interference fit with a bearing is provided on the hub, and a stress relief structure is provided on the radial outer side of the connecting part.

[0008] In a preferred embodiment, the stress relief structure is arranged around the wheel hub.

[0009] In a preferred embodiment, an annular protrusion is provided on the outer periphery of the wheel hub, the annular protrusion extending circumferentially around the wheel hub, and the stress relief structure includes a plurality of thinning grooves, the thinning grooves being evenly spaced along the circumferential direction of the annular protrusion.

[0010] In a preferred embodiment, the thinning groove is a strip-shaped groove, and one sidewall of the strip-shaped groove is defined by the sidewall of the hub.

[0011] In a preferred embodiment, the connecting part includes a plurality of connecting grooves, which are evenly spaced along the circumference of the hub.

[0012] Another objective of this application is to provide a vortex pump, including a pump body, wherein the pump body is provided with a stationary vortex disk and a moving vortex disk as described above, the stationary vortex disk is provided with a first vortex tooth, the moving vortex disk is provided with a second vortex tooth, and the first vortex tooth and the second vortex tooth mesh to form a working cavity.

[0013] In a preferred embodiment, the hub is located on the first side of the disc body, and the second spiral tooth is located on the second side of the disc body.

[0014] In a preferred embodiment, the moving scroll disk is connected to a driving component and an anti-rotation component. The driving component is used to drive the moving scroll disk to perform eccentric rotational motion, and the anti-rotation component is used to limit the rotational degrees of freedom of the moving scroll disk.

[0015] In a preferred embodiment, the anti-rotation component is a cross-slip ring assembly, a ball joint assembly, or a double crank assembly.

[0016] In a preferred embodiment, the driving component is a motor, and the output shaft of the motor is connected to the moving scroll plate.

[0017] Compared with the prior art, the beneficial effects of this utility model are: by setting a stress relief structure on the radially outer side of the connection part, the assembly stress is effectively absorbed and isolated, so that most of the deformation energy is concentrated in the stress relief structure area, thereby blocking the stress from being transmitted to the main body of the disc and preventing the disc from twisting and deforming. Attached Figure Description

[0018] Figure 1 This is one of the structural schematic diagrams of a moving vortex disk according to this application; Figure 2 For this application Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is the second schematic diagram of the structure of a moving vortex disk according to this application; Figure 4 This is the third schematic diagram of the structure of a moving vortex disk according to this application.

[0019] In the diagram: 1. Disc body; 2. Hub; 3. Connecting groove; 4. Thinning groove; 5. Second volute tooth. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0021] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0022] Please refer to Figures 1-4 As shown, this application discloses a moving scroll disk, including a disk body 1. A hub 2 protruding to one side is provided at the geometric center of the disk body 1. A connecting part for interference fit with a bearing is provided on the hub 2, and a stress relief structure is provided on the radially outer side of the connecting part. The radial assembly stress generated by the interference fit between the hub 2 and the bearing is transmitted to the entire disk body 1 through the hub 2, causing the disk body 1 to deform. By providing the stress relief structure, a "buffer zone" is formed between the hub 2 and the base of the disk body 1. This "buffer zone" can effectively absorb and isolate the assembly stress, so that most of the deformation can be concentrated in this area, thereby preventing the stress from being transmitted to the main body of the disk body 1 and preventing the disk body 1 from twisting and deforming. This ensures that the scroll teeth of the moving scroll disk can still maintain extremely high geometric accuracy after the bearing is pressed in or heat-fitted. This is the basis for ensuring efficient sealing and meshing of the moving and stationary scroll disks and preventing gas leakage.

[0023] Please continue reading. Figure 2 and Figure 3As shown, the connecting part further includes multiple connecting grooves 3, which are evenly spaced along the circumference of the hub 2. A stress-relieving structure is arranged around the hub 2 to absorb and isolate the large radial stress generated on the hub 2 during the interference fit process, preventing this stress from being transmitted to the main body of the disc 1 and causing warping or twisting deformation, thereby ensuring the accuracy of the spiral teeth. Specifically, an annular protrusion is provided on the outer periphery of the hub 2, extending circumferentially around the hub 2. The annular protrusion itself increases the local stiffness of the root of the hub 2, providing stronger support. The stress-relieving structure includes several thinning grooves 4, which are evenly spaced along the circumference of the annular protrusion. These thinning grooves 4 are formed by machining methods, such as milling. The evenly spaced layout ensures the balance of stress relief and avoids the generation of new unbalanced stresses.

[0024] Preferably, the thinning groove 4 is a strip groove with a U-shaped cross-section, and one sidewall of the strip groove is defined by the sidewall of the hub 2. This arrangement ensures that the stress generated by the interference fit is first concentrated in the mechanically weak area formed by the sidewall of the hub 2 and the thinning groove 4, and is released and buffered by the slight elastic deformation of the thinning groove 4, thereby effectively blocking the stress propagation path to the disc 1.

[0025] Another embodiment of this application provides a vortex pump, including a pump body. A stationary vortex disk and a moving vortex disk are disposed within the pump body. The stationary vortex disk is provided with first vortex teeth, and the moving vortex disk is provided with second vortex teeth 5. The first and second vortex teeth 5 mesh to form a series of crescent-shaped, sealed working chambers for completing the gas intake, compression, and discharge processes. Specifically, a hub 2 is disposed on the first side of the disk body 1, and the second vortex teeth 5 are disposed on the second side of the disk body 1.

[0026] Understandably, the moving scroll plate is connected to a driving component, which drives the moving scroll plate to perform eccentric rotational motion. Preferably, the driving component is a motor, and the output shaft of the motor is connected to the moving scroll plate.

[0027] To prevent the moving scroll disk from rotating on its own axis during its revolution, an anti-rotation component is connected to the moving scroll disk to restrict its rotational degrees of freedom. The anti-rotation component can be a cross-slip ring assembly, a ball joint assembly, or a double-crank assembly. Preferably, the anti-rotation component is a cross-slip ring assembly, which includes a frame and a cross-slip ring connected to the back of the moving scroll disk. Through the orthogonal keyway engagement, the rotational degrees of freedom of the moving scroll disk are constrained, causing it to perform only a specified translational rotational motion.

[0028] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A moving scroll disk, characterized in that, It includes a disc body (1), a hub (2) is provided at the center of the disc body (1), and a connecting part for interference fit with the bearing is provided on the hub (2), and a stress relief structure is provided on the radial outer side of the connecting part.

2. The moving scroll disk according to claim 1, characterized in that, The stress relief structure is arranged around the hub (2).

3. The moving scroll disk according to claim 2, characterized in that, The outer periphery of the hub (2) is provided with an annular protrusion, which extends circumferentially around the hub (2). The stress relief structure includes several thinning grooves (4), which are evenly spaced along the annular protrusion.

4. The moving scroll disk according to claim 3, characterized in that, The thinning groove (4) is a strip groove, and one sidewall of the strip groove is defined by the sidewall of the hub (2).

5. The moving scroll disk according to claim 1, characterized in that, The connecting part includes multiple connecting grooves (3), which are evenly spaced along the circumference of the hub (2).

6. A vortex pump, characterized in that, The pump body includes a stationary vortex disk and a moving vortex disk as described in any one of claims 1 to 5. The stationary vortex disk is provided with a first vortex tooth, and the moving vortex disk is provided with a second vortex tooth (5). The first vortex tooth and the second vortex tooth (5) mesh to form a working cavity.

7. The vortex pump according to claim 6, characterized in that, The hub (2) is located on the first side of the disc body (1), and the second spiral tooth (5) is located on the second side of the disc body (1).

8. The vortex pump according to claim 6, characterized in that, The moving scroll disk is connected to a driving component and an anti-rotation component. The driving component is used to drive the moving scroll disk to perform eccentric rotational motion, and the anti-rotation component is used to limit the rotational degrees of freedom of the moving scroll disk.

9. The vortex pump according to claim 8, characterized in that, The anti-rotation component is a cross-slip ring assembly, a ball joint assembly, or a double crank assembly.

10. The vortex pump according to claim 8, characterized in that, The driving component is a motor, and the output shaft of the motor is connected to the moving scroll plate.

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