Distance adjusting assembly, rotor assembly and magnetic suspension compressor

Abstract

The utility model discloses a distance adjusting assembly, a rotor assembly and a magnetic suspension compressor, and relates to the technical field of magnetic suspension compressors, the distance adjusting assembly comprises a first adjusting member, a second adjusting member and a support sleeve; the first adjusting piece and the second adjusting piece are coaxially arranged at an interval; the supporting sleeve is arranged between the first adjusting piece and the second adjusting piece, the two ends of the supporting sleeve abut against the first adjusting piece and the second adjusting piece respectively, and the supporting sleeve is used for being sleeved with the protection bearing. Each of the first adjusting piece and the second adjusting piece comprises a main body ring part and a protruding ring part coaxially arranged with the main body ring part, and the protruding ring parts protrude from the end faces of the main body ring parts to the supporting sleeve so as to abut against the supporting sleeve; the diameter of the protruding ring part is smaller than or equal to that of the supporting sleeve. The protection bearing is used for being installed between the two main body ring parts, and the gap between the protection bearing and the main body ring parts is adjusted by replacing the first adjusting piece and the second adjusting piece which are different in size.

Description

Technical Field

[0001] This utility model relates to the field of magnetic levitation compressor technology, and in particular to a distance adjustment component, a rotor component, and a magnetic levitation compressor. Background Technology

[0002] In magnetic levitation compressors, the protective bearing plays a crucial role. When the magnetic levitation bearing is not working or experiences an abnormal power outage, the protective bearing provides radial support to the rotor, preventing the rotor from contacting other stationary components. When the rotor experiences axial movement during operation, the protective bearing can make contact with the rotor first, preventing the high-speed rotor from rubbing against stationary components, thus effectively protecting the critical components of the magnetic levitation compressor.

[0003] Currently, such as Figure 1 As shown, the traditional structure in the market involves fitting a support sleeve A onto the rotor, with two shims B installed at each end of the support sleeve A, and a protective support sleeve fitted onto the collar between the two shims. However, due to the high requirements for the position of the protective bearing, and the existence of manufacturing tolerances in the compressor assembly process, and the need for a gap between the protective bearing and the two shims to achieve axial protection, different sized support sleeves and shims are required to adjust the position of the protective bearing. This adjustment method not only increases the types and number of components, but also requires frequent replacement of support sleeves of different sizes during assembly, leading to increased processing costs, low assembly efficiency, and difficulty in guaranteeing adjustment accuracy. Utility Model Content

[0004] The main purpose of this invention is to propose a distance adjustment component, a rotor component, and a magnetic levitation compressor, aiming to solve the problems of high processing costs and low assembly efficiency caused by adjusting the position of the protective bearing using various sizes of support sleeves and shims in the prior art. By simplifying the adjustment components, the invention improves the adjustment accuracy and assembly efficiency.

[0005] To achieve the above objectives, the present invention proposes a distance adjustment component for use in a magnetic levitation compressor. This component is fitted onto the rotor of the magnetic levitation compressor to protect the bearing. It includes a first adjusting member, a second adjusting member, and a support sleeve. The first adjusting member and the second adjusting member are coaxially spaced apart. The support sleeve is positioned between the first adjusting member and the second adjusting member, with both ends of the support sleeve abutting against the first adjusting member and the second adjusting member, respectively. The support sleeve is used to protect the bearing.

[0006] The first adjusting member and the second adjusting member each include a main ring portion and a protruding ring portion coaxially disposed with the main ring portion. The protruding ring portion protrudes from the end face of the main ring portion to the support sleeve to abut against the support sleeve. The diameter of the protruding ring portion is less than or equal to the diameter of the support sleeve. The protective bearing is used to be installed between the two main ring portions, and the gap between the protective bearing and the main ring portion can be adjusted by replacing the first adjusting member and the second adjusting member of different sizes.

[0007] In one embodiment, the thickness of the protruding ring is less than the thickness of the main ring.

[0008] In one embodiment, the diameter of the protruding ring is equal to the diameter of the support sleeve, and a stepped groove is formed between the protruding ring and the main ring. The two stepped grooves and the support sleeve bracket are used to accommodate the protective bearing.

[0009] In one embodiment, the thickness of the protruding ring is in the range of 1.5-3.5 mm.

[0010] In one embodiment, the difference between the diameter of the protruding ring and the diameter of the main ring is more than 5 mm.

[0011] This utility model also proposes a rotor assembly for use in a magnetic levitation compressor, including a motor rotor, a thrust disk, a protective bearing, and the aforementioned distance adjustment assembly; the motor rotor is used to cooperate with the stator of the magnetic levitation compressor; the thrust disk is sleeved on the motor rotor; the distance adjustment assembly is sleeved on the motor rotor and located outside the thrust disk; the protective bearing is sleeved on the distance adjustment assembly.

[0012] In one embodiment, the rotor assembly further includes an axial sensor detection disk and a pneumatic component sleeved on the motor rotor, the pneumatic component being located outside the axial sensor detection disk.

[0013] In one embodiment, there is a gap between the two ends of the protective bearing and the main ring portion.

[0014] In one embodiment, the rotor assembly further includes two radial bearing assemblies sleeved on the motor rotor.

[0015] This utility model also proposes a magnetic levitation compressor, including the rotor assembly described above.

[0016] The technical solution of this utility model, by setting a protruding ring to abut against the support sleeve, allows the use of a support sleeve of a fixed size, reducing the diversity of support sleeve sizes and saving processing costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a structural diagram of an existing technical solution;

[0019] Figure 2 A schematic diagram of the rotor assembly of a magnetic levitation compressor according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of an embodiment of the distance adjustment component provided by this utility model.

[0021] Explanation of icon numbers:

[0022] 100. Distance adjustment component; 10. First adjustment component; 11. Main body ring; 12. Protruding ring; 20. Second adjustment component; 30. Support sleeve; 200. Protective bearing; 300. Motor rotor; 400. Thrust disc; 500. Axial sensor detection disc; 600. Pneumatic component; 700. Radial bearing assembly.

[0023] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0025] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0026] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0027] Please see Figure 2 and Figure 3 As shown, one embodiment of this utility model proposes a distance adjustment assembly 100, which is used in a magnetic levitation compressor to adjust the position of a protective bearing 200. The distance adjustment assembly 100 is sleeved on the rotor of the magnetic levitation compressor for the protective bearing 200 to be fitted. The distance adjustment assembly 100 includes a first adjusting member 10, a support sleeve 30, and a second adjusting member 20 sequentially sleeved on the rotor. The two ends of the support sleeve 30 abut against the first adjusting member 10 and the second adjusting member 20, respectively. The first adjusting member 10 and the second adjusting member 20 have the same structure and are arranged opposite to each other. Both the first adjusting member 10 and the second adjusting member 20 include a main ring portion 11 and a protruding ring portion 12 coaxially arranged with the main ring portion 11. The protruding ring portion 12 protrudes from the end face of the main ring portion 11 towards the support sleeve 30 to abut against the support sleeve 30. The diameter of the protruding ring portion 12 is less than or equal to the diameter of the support sleeve 30. The protective bearing 200 is sleeved on the support sleeve 30 and is located between the two main ring portions 11. The gap between the protective bearing 200 and the main ring 11 can be adjusted by replacing the first adjusting member 10 and the second adjusting member 20 of different sizes.

[0028] Specifically, both the first adjusting member 10 and the second adjusting member 20 are composed of a main body ring 11 and a protruding ring 12. The main body ring 11 is the basic structure, providing a mounting surface for mating with other components. The protruding ring 12 protrudes from one end of the main body ring 11 towards the support sleeve 30, and its diameter is less than or equal to the diameter of the support sleeve 30. It is mainly used to abut against the support sleeve 30 and plays a key role in adjusting the position of the protective bearing 200. These two adjusting members are coaxially spaced, providing a basis for positioning and adjustment of the support sleeve 30 and the protective bearing 200. The support sleeve 30 is located between the first adjusting member 10 and the second adjusting member 20, with both ends abutting against them respectively. Its function is to provide a carrier for the protective bearing 200, acting as a bridge for connection and support in the entire assembly. Installed between the main body rings 11 of the two adjusting members, it is the core component of the entire distance adjustment assembly 100 protecting the rotor of the magnetic levitation compressor, providing radial and axial protection to the rotor when the magnetic levitation bearing malfunctions. In this embodiment, the gap between the protective bearing 200 and the main ring 11 can be adjusted by replacing the first adjusting component 10 and the second adjusting component 20 of different sizes. This eliminates the need for multiple sizes of support sleeves 30 and shims as in traditional methods, simplifying the adjustment process and improving assembly efficiency. Compared to traditional solutions, only different sizes of the first adjusting component 10 and the second adjusting component 20 are required, while a fixed-size support sleeve 30 can be used, reducing the variety of support sleeve 30 sizes and saving processing costs. Using the same-sized support sleeve 30 with different-sized adjusting components allows for more precise control of the protective bearing 200's position, avoiding errors caused by combinations of multiple component sizes. This ensures that the protective bearing 200 accurately performs radial and axial protection during the operation of the magnetic levitation compressor, improving the stability and reliability of the magnetic levitation compressor's operation.

[0029] Furthermore, the thickness of the protruding ring portion 12 is less than the thickness of the main body ring portion 11.

[0030] Specifically, in this embodiment, in addition to the basic structure of the original main ring 11 and protruding ring 12, the thickness of the protruding ring 12 is reduced to that of the main ring 11. The thicker main ring 11 ensures the overall structural strength of the adjusting component, allowing it to stably withstand forces from various directions when fitted onto the rotor and cooperating with other components, such as the pressure transmitted by the protective bearing 200 and the centrifugal force generated during rotor rotation, without easily deforming. The thicker main ring 11 also provides a more stable foundation for installation and adjustment. The relatively thin protruding ring 12, on the one hand, reduces material usage and lowers production costs; on the other hand, the thinner protruding ring 12 can more flexibly adapt to different size adjustment requirements when abutting against the support sleeve 30. Due to its smaller thickness, the impact on the overall axial dimension of the assembly is relatively small when replacing adjusting components of different sizes, facilitating more precise fine-tuning of the protective bearing 200's position. The thinner protruding ring 12 allows for more precise adjustment of the protective bearing 200's position. In practical applications, the adjustment of the position of the protective bearing 200 often needs to be precise to a small dimensional range. The protruding ring 12 has a small thickness, which can provide more options for different thickness specifications and achieve finer adjustments.

[0031] Furthermore, the diameter of the protruding ring 12 is equal to the diameter of the support sleeve 30, and a stepped groove is formed between the protruding ring and the main ring. The two stepped grooves and the support sleeve 30 bracket are used to accommodate the protective bearing 200.

[0032] Specifically, in this embodiment, the diameter of the protruding ring 12 of the first adjusting member 10 and the second adjusting member 20 is equal to the diameter of the support sleeve 30. This design allows for seamless connection between the protruding ring 12 and the support sleeve 30, providing a more stable support structure for the protective bearing 200. Simultaneously, the stepped groove formed between the protruding ring 12 and the main ring 11 becomes a key structure for accommodating the protective bearing 200. Besides connecting the first adjusting member 10 and the second adjusting member 20, the support sleeve 30, with its diameter equal to the protruding ring 12, provides a continuous and uniform support surface for the protective bearing 200 when engaged with the adjusting member. The length and inner diameter of the support sleeve 30 are matched to the design requirements of the protective bearing 200 and the entire assembly, ensuring both free rotation of the protective bearing 200 and the ability of the support sleeve 30 to withstand corresponding pressure and impact when the protective bearing 200 is in operation. The protective bearing 200 is precisely accommodated within the space formed by the two stepped grooves and the support sleeve 30, achieving better positioning and constraint in both the axial and radial directions. This structural design makes the entire distance adjustment assembly 100 more compact. The protruding ring 12 seamlessly engages with the support sleeve 30, and the stepped groove tightly accommodates the protective bearing 200.

[0033] Furthermore, the thickness of the protruding ring 12 is in the range of 1.5-3.5 mm. The difference between the diameter of the protruding ring 12 and the diameter of the main ring 11 is more than 5 mm.

[0034] Specifically, in this embodiment, the thickness of the protruding ring 12 is limited to 1.5-3.5 mm, a range determined through comprehensive consideration. A thinner protruding ring 12 (close to 1.5 mm) satisfies both connection and positioning functions while minimizing the impact on the axial dimensions of the component, facilitating finer position adjustments, especially suitable for magnetic levitation compressors where the positional accuracy of the protective bearing 200 is extremely high. A thicker protruding ring 12 (close to 3.5 mm) provides better structural strength, ensuring that the contact area between the protruding ring 12 and the support sleeve 30 does not easily deform under high pressure, such as during the start-up, stop, or abnormal operating conditions of the magnetic levitation compressor, thus guaranteeing the reliability of the entire component. The diameter difference between the protruding ring 12 and the main ring 11 is more than 5 mm, forming a distinct stepped structure. This larger diameter difference makes the stepped groove more pronounced, providing a more stable installation space for the protective bearing 200. The main ring 11 has a large diameter, which ensures the stability of the fit between the adjusting component and the rotor, as well as the overall structural strength. It can effectively resist centrifugal force during high-speed rotation, ensuring that the adjusting component will not be deformed or damaged due to centrifugal force.

[0035] This utility model also proposes a rotor assembly for a magnetic levitation compressor. The rotor assembly includes a motor rotor 300, a thrust disk 400, a protective bearing 200, and the aforementioned distance adjustment component 100. The specific structure of the distance adjustment component 100 is as described in the above embodiments. Since the rotor assembly of this embodiment adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. The motor rotor 300 is used to cooperate with the stator of the magnetic levitation compressor. The thrust disk 400 is sleeved on the motor rotor 300. The distance adjustment component 100 is sleeved on the motor rotor 300 and located outside the thrust disk 400. The protective bearing 200 is sleeved on the distance adjustment component 100.

[0036] Specifically, in this embodiment, the motor rotor 300, as the core power component of the magnetic levitation compressor rotor assembly, has a specific shape and structure. The thrust disk 400 has a disc-shaped structure and is fitted onto the motor rotor 300. It is tightly connected to the motor rotor 300, ensuring that the two rotate synchronously when the motor rotor 300 rotates. The thrust disk 400 is mainly used to balance axial forces. During the operation of the magnetic levitation compressor, factors such as gas pressure will generate axial forces. The thrust disk 400 can withstand and disperse these axial forces, preventing excessive displacement of the motor rotor 300 in the axial direction, ensuring the axial stability of the rotor assembly, and thus maintaining the normal operation of the entire magnetic levitation compressor. The protective bearing 200 has good wear resistance and load-bearing capacity. It is fitted onto the distance adjustment assembly 100, specifically located in the space between the support sleeve 30 and the two main rings 11 of the distance adjustment assembly 100. The main function of the protective bearing 200 is to play a key protective role for the motor rotor 300 in special circumstances such as failure of the magnetic levitation bearing, abnormal power failure or axial movement of the rotor, so as to prevent the motor rotor 300 from directly contacting other stationary parts and prevent equipment damage caused by collision and friction.

[0037] This application simplifies the adjustment of the position of the protective bearing 200 through the unique structural design of the distance adjustment component 100. Precise adjustment of the protective bearing 200's position can be achieved simply by replacing the first adjustment component 10 and the second adjustment component 20 with different sizes, eliminating the need for multiple complex parts as in traditional methods. This adjustment method not only improves the efficiency of adjustment during assembly and maintenance but also reduces processing costs and minimizes management and inventory costs associated with a wide variety of components.

[0038] Furthermore, the rotor assembly also includes an axial sensor detection disk 500 and a pneumatic component 600 mounted on the motor rotor 300, with the pneumatic component 600 located outside the axial sensor detection disk 500.

[0039] Specifically, the axial sensor detection disk 500 is mounted on the motor rotor 300, featuring a flat and smooth surface to ensure accurate detection of its relevant parameters. The disk's main function is to work in conjunction with the axial sensor to monitor the position and displacement of the motor rotor 300 in the axial direction in real time, providing crucial data for the magnetic levitation compressor's control system. This allows the system to adjust the working state of the magnetic levitation bearings promptly, ensuring the motor rotor 300 remains in a stable operating position. The pneumatic component 600 is located outside the axial sensor detection disk 500 and is mounted on the motor rotor 300. It typically consists of key components such as an impeller and a diffuser. The impeller, the core of the pneumatic component 600, usually has a special blade shape and structure. Driven by the motor rotor 300, it rotates at high speed, applying force to the gas, giving it kinetic energy and accelerating its flow. The diffuser converts the kinetic energy of the high-speed flowing gas at the impeller outlet into pressure energy, achieving gas compression. This is a crucial step in the magnetic levitation compressor's gas compression function.

[0040] The axial sensor detection disk 500, in conjunction with the axial sensor, enables real-time and precise monitoring of the axial state of the motor rotor 300. By acquiring this data, the magnetic levitation compressor's control system can adjust the magnetic force of the magnetic bearing in a timely manner, precisely controlling the axial position of the motor rotor 300. This prevents axial movement or misalignment of the rotor, improving the stability and control accuracy of the entire rotor assembly. This not only helps improve the working efficiency of the magnetic levitation compressor but also reduces component wear and failures caused by rotor instability, extending the equipment's service life.

[0041] Furthermore, there is a gap between the two ends of the protective bearing 200 and the main body ring 11.

[0042] Specifically, when the magnetic levitation bearing fails and the rotor experiences significant axial movement, the gap between the protective bearing 200 and the main body ring 11 provides a buffer space for the rotor. When the rotor displacement reaches a certain level, the protective bearing 200 can quickly contact the main body ring 11, effectively limiting further rotor displacement and protecting the rotor and other components from damage. This design allows the protective bearing 200 to function more promptly and effectively under abnormal conditions, improving the reliability and safety of the entire magnetic levitation compressor.

[0043] Furthermore, the rotor assembly also includes two radial bearing assemblies 700 mounted on the motor rotor 300.

[0044] Specifically, two radial bearing assemblies 700 are symmetrically mounted on both axial sides of the motor rotor 300. The magnetic field generated by the electromagnetic system of the radial bearing assemblies 700 acts on the motor rotor 300, overcoming its gravity and suspending it. Through precise gravity sensing and electromagnetic force adjustment, the radial bearings ensure stable suspension of the motor rotor 300, effectively reducing mechanical friction and wear. This not only reduces energy loss and improves the efficiency of the magnetic levitation compressor, but also allows the rotor to operate at higher speeds, enhancing gas compression capacity and meeting the industrial demand for efficient and stable compression equipment.

[0045] This utility model also proposes a magnetic levitation compressor, which includes the rotor assembly described above, and the rotor assembly includes the distance adjustment assembly described above. The specific structure of the distance adjustment assembly is as described in the above embodiments. Since the magnetic levitation compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0046] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A distance adjusting assembly for use in a magnetic levitation compressor, which is provided on a rotor of the magnetic levitation compressor for protecting a bearing sleeve, characterized in that, include: A first adjusting member and a second adjusting member are coaxially spaced apart. A support sleeve is disposed between the first adjusting member and the second adjusting member, and the two ends of the support sleeve abut against the first adjusting member and the second adjusting member respectively. The support sleeve is used for the protective bearing to be fitted. The first adjusting member and the second adjusting member each include a main ring portion and a protruding ring portion coaxially disposed with the main ring portion. The protruding ring portion protrudes from the end face of the main ring portion to the support sleeve to abut against the support sleeve. The diameter of the protruding ring portion is less than or equal to the diameter of the support sleeve. The protective bearing is used to be installed between the two main ring portions, and the gap between the protective bearing and the main ring portion can be adjusted by replacing the first adjusting member and the second adjusting member of different sizes.

2. The distance adjustment assembly of claim 1, wherein, The thickness of the protruding ring is less than the thickness of the main ring.

3. The distance adjustment assembly of claim 1, wherein, The diameter of the protruding ring is equal to the diameter of the support sleeve. A stepped groove is formed between the protruding ring and the main ring. The two stepped grooves and the support sleeve bracket are used to accommodate the protective bearing.

4. The distance adjustment assembly of claim 1, wherein, The thickness of the protruding ring is in the range of 1.5-3.5 mm.

5. The distance adjustment assembly of claim 1, wherein, The difference between the diameter of the protruding ring and the diameter of the main ring is more than 5 mm.

6. A rotor assembly for use in a magnetic levitation compressor, characterized by, include: The motor rotor is used to cooperate with the stator of the magnetic levitation compressor; A thrust disc, which is sleeved on the motor rotor; The distance adjustment assembly as described in any one of claims 1-5, wherein the distance adjustment assembly is sleeved on the motor rotor and located outside the thrust disc; A protective bearing is fitted onto the distance adjustment assembly.

7. The rotor assembly of claim 6, wherein The rotor assembly also includes an axial sensor detection disk and a pneumatic component sleeved on the motor rotor, with the pneumatic component located outside the axial sensor detection disk.

8. The rotor assembly of claim 6, wherein There are gaps between the two ends of the protective bearing and the main ring portion.

9. The rotor assembly of claim 6, wherein, The rotor assembly also includes two radial bearing assemblies sleeved on the motor rotor.

10. A magnetic levitation compressor characterized by, Includes the rotor assembly as described in any one of claims 6 to 9.

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