Gap-adjustable magnetic suspension centrifugal blower
By setting adjustable thickness and number of adjustable gaskets in the magnetic levitation centrifugal blower, the problem of cumbersome gap adjustment in the prior art is solved, and the effect of simplifying adjustment and improving assembly efficiency is achieved.
Patent Information
- Application Number
- CN202422441299.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-10-10
AI Technical Summary
The existing magnetic levitation centrifugal blowers need to disassemble and assemble the volutes multiple times when adjusting the blade top clearance, resulting in cumbersome process and inconvenient operation.
A magnetic levitation centrifugal blower with adjustable gap is designed. By setting adjustable thickness and number of adjustment gaskets between the volute shell and the current collector, and connecting threaded fasteners, axial adjustment between the volute shell and the current collector is achieved, avoiding the removal of the volute shell and directly adjusting the blade top gap.
The adjustment process of the blade top clearance is simplified, the workload is reduced, the assembly efficiency is improved, the aerodynamic performance of the blower is ensured, and the cumbersome operation of repeated disassembly of the volute shell is avoided.
Smart Images
Figure CN223282241U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of refrigeration, in particular to a magnetic suspension centrifugal blower with adjustable gap. Background Art
[0002] The tip clearance of a semi-open impeller directly impacts its efficiency and operational reliability. Excessive tip clearance significantly reduces impeller efficiency, making operation uneconomical. If the tip clearance is too small, axial movement of the shaft can cause friction between the impeller blades and the collector, damaging the blades or collector, or even causing downtime. Due to inevitable machining errors, the tip clearance can deviate from the designed value during assembly. Therefore, tip clearance adjustment is required during assembly by axially moving the collector.
[0003] The collector of existing blowers is usually positioned with the volute by a stopper, and the collector is moved by inserting a gasket between the volute and the cylinder. However, the volute is generally heavy, so this adjustment method is time-consuming and labor-intensive, and the assembly efficiency is low.
[0004] Since the magnetic levitation centrifugal blower in the prior art has technical problems such as requiring multiple disassembly and assembly of the volute when adjusting the blade tip clearance, resulting in a cumbersome process and inconvenient operation, the utility model studies and designs a magnetic levitation centrifugal blower with adjustable clearance. Utility Model Content
[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the magnetic levitation centrifugal blower in the prior art that when adjusting the blade tip clearance, the volute needs to be disassembled and assembled multiple times, resulting in a cumbersome process and inconvenient operation, thereby providing a magnetic levitation centrifugal blower with adjustable clearance.
[0006] In order to solve the above problems, the utility model provides a magnetic suspension centrifugal blower with adjustable gap, which includes:
[0007] The collector, the volute and the adjustment gasket, the magnetic levitation centrifugal blower has an axial direction, the volute has a first connection part protruding and extending toward the axial direction, the collector has a second connection part connected to the first connection part in the axial direction, and adjustment gaskets of different thicknesses and / or adjustment gaskets of different layers can be arranged between the first connection part and the second connection part, the adjustment gasket includes a gasket body and an operating part, the gasket body is located between the first connection part and the second connection part and is respectively connected to the first connection part and the second connection part, the operating part is connected to the outer periphery of the gasket body and is arranged to protrude outward.
[0008] In some embodiments,
[0009] The adjusting gasket comprises a multi-segmented structure spaced apart in the circumferential direction, and each layer of the adjusting gasket is divided into 2 to 4 segments in the circumferential direction; the number of layers of the adjusting gasket is 3 to 8; and the thickness of each layer of the adjusting gasket ranges from 0.1 to 0.6 mm.
[0010] In some embodiments,
[0011] The adjustment gasket of the multi-segmented structure includes adjustment gasket one, adjustment gasket two, adjustment gasket three and adjustment gasket four in the circumferential direction. The adjustment gasket one, the adjustment gasket two, the adjustment gasket three and the adjustment gasket four are arranged in sequence at intervals in the circumferential direction, and the adjustment gasket one, the adjustment gasket two, the adjustment gasket three and the adjustment gasket four all include a gasket body and an operating part.
[0012] In some embodiments,
[0013] In the projection plane in the axial direction, the gasket body of each segmented adjustment gasket is an arc-shaped ring structure, the radial inner end of the operating part is connected to the outer periphery of the gasket body, the radial outer end of the operating part protrudes radially outward, and the operating part is triangular in shape.
[0014] In some embodiments,
[0015] The operating portion is not opposite to the first connection portion in the axial direction, nor is it opposite to the second connection portion in the axial direction. In the projection plane in the axial direction, the operating portion is located on the radial outer periphery of the first connection portion and also on the radial outer periphery of the second connection portion.
[0016] In some embodiments,
[0017] The first connecting portion and the second connecting portion are connected by a first threaded fastener. A screw hole is provided on the gasket body opposite to the first threaded fastener. The first threaded fastener is provided through the screw hole. The screw hole is a groove structure opened from the inner circumferential wall of the gasket body toward the radial outward direction.
[0018] In some embodiments,
[0019] The screw hole is opposite to the operating part in the radial direction and is located radially inside the operating part. The radial outer end of the screw hole is spaced from the radial inner end of the operating part by a preset distance greater than 0, so that the screw hole is formed as a blind groove that is open at the radial inner end and closed at the radial outer end.
[0020] In some embodiments,
[0021] There are at least two screw holes, and at least two of the screw holes are spaced apart in the circumferential direction of the gasket body, one of the screw holes is opposite to the operating part in the radial direction and is located radially inside the operating part, and the radial outer end of the screw hole is spaced apart from the radial inner end of the operating part by a preset distance greater than 0, so that the screw hole is formed as a blind groove that is open at the radial inner end and closed at the radial outer end; the other screw holes are not opposite to the operating part in the radial direction, and are all blind groove structures in the radial direction.
[0022] In some embodiments,
[0023] It also includes an impeller, and the collector also includes a mating section arranged radially inwardly of the first connecting portion, at least part of the structure of the impeller is also arranged radially inwardly of the mating section, and the mating section cooperates with the impeller to drive and pressurize the airflow.
[0024] In some embodiments,
[0025] It also includes a cylinder and a rotor. The volute also includes a diffuser section located at the radial outer end. The diffuser section has an internal diffuser cavity. The airflow compressed by the impeller can enter the internal diffuser cavity. The diffuser section is connected to the cylinder in the axial direction. The two are fastened by a second threaded fastener. The rotor is arranged inside the cylinder.
[0026] The utility model provides a magnetic suspension centrifugal blower with adjustable gap, which has the following beneficial effects:
[0027] 1. The utility model provides a volute of the magnetic levitation centrifugal blower with a first connection portion extending in the axial direction, and a collector with a second connection portion docked with the first connection portion in the axial direction. Adjustment gaskets of different thicknesses and / or different numbers of layers of adjustment gaskets can be provided between the first connection portion and the second connection portion. Therefore, adjustment gaskets of different thicknesses and / or different numbers of layers can be provided as needed, so that the axial gap between the volute and the throttle can be adjusted to a desired range. Since the volute is fixedly connected to the cylinder, the collector can be adjusted to be relatively far away from or relatively close to the volute in the axial direction through the above-mentioned adjustment method. The impeller is provided inside the collector, and the tip clearance can be adjusted by replacing or adding or removing gaskets without disassembling the volute. That is, the impeller tip clearance can be adjusted more conveniently without disassembling the volute. The tip clearance can be adjusted simply by replacing or adding or removing gaskets, that is, the impeller tip clearance can be adjusted more conveniently, which is beneficial to reducing workload and meeting the demand for simpler adjustment of the impeller tip clearance. There is an operating part on the adjusting gasket, which can protrude from the gasket body, which is convenient for users to operate and conveniently remove or install the adjusting gasket, solving the cumbersome problem of the existing magnetic levitation centrifugal blower requiring multiple disassembly and assembly of the volute when adjusting the tip clearance. This method is suitable for the initial stage of performance testing of the magnetic levitation centrifugal blower, which can avoid repeated disassembly of the blower volute and reduce the weight of the parts that need to be moved when adjusting the gap. The tip clearance of the impeller and the collector can be adjusted by increasing or decreasing the thickness of the adjusting gasket between the collector volute, thereby changing the performance of the blower, and ultimately accurately controlling the tip clearance of the impeller and the blower to ensure the aerodynamic performance of the blower.
[0028] 2. The application field of the present invention is magnetic levitation centrifugal blower. Different from centrifugal pumps, the adjustment gasket of the present invention is a multi-segmented structure in the circumferential direction, and the number is preferably 2 to 4 pieces, so that the adjustment gasket can be installed or removed by inserting and pulling the adjustment gasket in the radial direction, and the operation of adjusting the gap is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 This is a partial cross-sectional view of the impeller portion of the magnetic suspension centrifugal blower with adjustable clearance of the utility model;
[0030] Figure 2 The utility model is an axial top view of an adjusting gasket of a magnetic suspension centrifugal blower with adjustable gap.
[0031] The reference numerals indicate:
[0032] 1. Collector; 12. Second connection part; 13. First threaded fastener; 2. Adjusting gasket; 21. Gasket body; 22. Operating part; 3. Volute; 31. First connection part; 32. Diffuser section; 33. Internal diffuser cavity; 4. Cylinder; 5. Impeller; 6. Rotor; 7. Adjusting gasket 1; 8. Adjusting gasket 2; 9. Adjusting gasket 3; 10. Adjusting gasket 4; 11. Screw hole; 14. Fitting section; 15. Second threaded fastener. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.
[0035] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.
[0036] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.
[0037] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0038] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.
[0039] like Figure 1-2 As shown, the utility model provides a magnetic suspension centrifugal blower with adjustable gap, which includes:
[0040] The collector 1, the volute 3 and the adjustment gasket 2, the magnetic levitation centrifugal blower has an axial direction, the volute 3 has a first connection part 31 protruding and extending in the axial direction, the collector 1 has a second connection part 12 connected to the first connection part 31 in the axial direction, and adjustment gaskets 2 of different thicknesses and / or adjustment gaskets 2 of different layers can be arranged between the first connection part 31 and the second connection part 12, the adjustment gasket 2 includes a gasket body 21 and an operating part 22, the gasket body 21 is located between the first connection part 31 and the second connection part 12 and is respectively connected to the first connection part 31 and the second connection part 12, the operating part 22 is connected to the outer periphery of the gasket body 21 and is arranged to protrude outward.
[0041] The utility model provides a volute of a magnetic levitation centrifugal blower with a first connecting portion extending in an axial direction, and a collector with a second connecting portion docked with the first connecting portion in an axial direction, and adjustment gaskets of different thicknesses and / or different numbers of layers can be provided between the first connecting portion and the second connecting portion. Therefore, adjustment gaskets of different thicknesses and / or different numbers of layers can be provided as needed, so that the axial gap between the volute and the throttle can be adjusted to within a desired range. Since the volute is fixedly connected to the cylinder, the collector can be adjusted to be relatively far away from or relatively close to the volute in the axial direction through the above-mentioned adjustment method, and the impeller is provided inside the collector, so that the gap between the impeller blade tip and the collector can be effectively adjusted, and this can be achieved by replacing or adding or removing gaskets without disassembling the volute. The adjustment of the blade tip clearance can more conveniently adjust the impeller blade tip clearance, which is beneficial to reducing workload and meeting the demand for simpler adjustment of the impeller blade tip clearance. There is an operating part on the adjustment gasket, which can protrude from the gasket body, which is convenient for users to operate and conveniently remove or install the adjustment gasket, solving the cumbersome problem of the existing magnetic levitation centrifugal blower requiring multiple disassembly and assembly of the volute when adjusting the blade tip clearance. This method is suitable for the initial stage of performance testing of the magnetic levitation centrifugal blower, which can avoid repeated disassembly of the blower volute and reduce the weight of parts that need to be moved when adjusting the gap. The blade tip clearance of the impeller and the collector can be adjusted by increasing or decreasing the thickness of the adjustment gasket between the collector volute, thereby changing the performance of the blower, and ultimately accurately controlling the blade tip clearance of the impeller and the blower to ensure the aerodynamic performance of the blower.
[0042] In some embodiments,
[0043] The adjusting gasket 2 includes a multi-segmented structure spaced apart in the circumferential direction, and each layer of the adjusting gasket 2 is divided into 2 to 4 segments in the circumferential direction; the number of layers of the adjusting gasket 2 is 3 to 8 layers; and the thickness of each layer of the adjusting gasket 2 ranges from 0.1 to 0.6 mm.
[0044] The adjusting gasket of the present invention is preferably a multi-segmented structure in the circumferential direction, and the number is preferably 2 to 4 pieces, so that the adjusting gasket can be installed or removed by inserting and pulling the adjusting gasket in the radial direction. Compared with the gasket of a full circle of rings, there is no need to insert or remove it from the axial direction, and the operation of adjusting the gap is more convenient.
[0045] In some embodiments,
[0046] The adjustment gasket 2 of the multi-segmented structure includes an adjustment gasket 1 7, an adjustment gasket 2 8, an adjustment gasket 3 9 and an adjustment gasket 4 10 in the circumferential direction. The adjustment gasket 1 7, the adjustment gasket 2 8, the adjustment gasket 3 9 and the adjustment gasket 4 10 are arranged in sequence at intervals in the circumferential direction, and the adjustment gasket 1 7, the adjustment gasket 2 8, the adjustment gasket 3 9 and the adjustment gasket 4 10 all include a gasket body 21 and an operating part 22.
[0047] This is a further preferred structural form of the adjustment gasket of the multi-segmented structure of the utility model, that is, a gasket segment structure including four segments in the circumferential direction, and the four segments are approximately 360° in the circumferential direction, so that they can form spacing and support effects on the entire circumferential direction of the contact surface of the collector and the volute, and have a better and more stable support effect. Each gasket segment includes a gasket body and an operating part, and can operate each segment structure separately, and the execution process is more convenient and efficient.
[0048] like Figure 1 As shown, the utility model provides a magnetic levitation centrifugal blower with adjustable blade tip clearance, comprising a collector 1, an adjustment gasket 2, a volute 3, a barrel 4, an impeller 5 and a rotor 6 (driving source). The collector 1 and the volute 3 are connected by bolts, and 3 to 8 layers of adjustment gaskets 2 are installed between the connection between the collector 1 and the volute 3. The number of adjustment gaskets 2 in each layer is preferably 2 to 4. The volute 3 and the barrel 4 are preferably positioned and connected by a stop. When changing the number of adjustment gaskets 2, it is only necessary to remove the collector 1 from the volute 3 without removing the volute 3 from the barrel 4, thereby improving the efficiency of disassembly and assembly. A rotor 6 is provided in the barrel 4, and the impeller 5 is coaxially connected to the rotor 6. The rotor 6 is preferably driven by a magnetic levitation motor, and the impeller 5 is directly connected to the rotor shaft of the magnetic levitation motor.
[0049] When the tip clearance needs to be increased, the bolts (first threaded fasteners) between the collector 1 and the volute 3 are removed. It is preferred to increase the number of adjustment gaskets 2 between the collector 1 and the volute 3. When the tip clearance needs to be reduced, it is preferred to reduce the number of adjustment gaskets 2 between the collector 1 and the volute 3. This can improve assembly efficiency and make adjusting the tip clearance more time-saving and labor-saving. When there is no device such as an adjustment gasket 2 between the collector 1 and the volute 3, changing the tip clearance requires lifting the volute 3 and removing it from the cylinder 4, which is time-consuming and labor-intensive.
[0050] As a preferred solution, Figure 2 As shown, the adjusting gasket 2 preferably includes adjusting gasket 1 7, adjusting gasket 2 8, adjusting gasket 3 9, and adjusting gasket 4 10. The four adjusting gaskets are arranged in a circle and installed between the assembly surfaces of the collector 1 and the volute 3. The adjusting gaskets 2 are provided with screw holes 11 through which bolts are passed to connect the collector 1 and the volute 3.
[0051] As a preferred solution, the adjustment gasket 2 is set to various thicknesses that meet the test performance requirements according to thickness specifications, preferably in the range of 0.1 to 0.6 mm.
[0052] In some embodiments,
[0053] In the projection plane in the axial direction, the gasket body 21 of each segmented adjustment gasket is an arc-shaped ring structure, the radial inner end of the operating part 22 is connected to the outer periphery of the gasket body 21, and the radial outer end of the operating part 22 protrudes radially outward, and the operating part 22 is triangular in shape.
[0054] This is a further preferred structural form of the adjustment gasket and operating part of the segmented structure of the utility model. Each segmented structure is preferably an arc-shaped ring structure, which can enable multiple segmented structures to be spliced into a gasket structure that is roughly in the shape of a circular ring in the circumferential direction, thereby forming a spacing and supporting effect on the entire circumferential direction of the contact surface of the collector and the volute, thereby improving the stability of the support effect; the operating part of the utility model is preferably a triangular structure protruding toward the radial outer end, which can be convenient for user operation and improve the efficiency of disassembly and assembly of the gasket.
[0055] In some embodiments,
[0056] In the axial direction, the operating part 22 is not opposite to the first connecting part 31, and in the axial direction, the operating part 22 is not opposite to the second connecting part 12. In the projection plane in the axial direction, the operating part 22 is located on the radial outer periphery of the first connecting part 31 and also on the radial outer periphery of the second connecting part 12.
[0057] The utility model ensures that the operating part is not opposite to the first and second connecting parts in the axial direction, especially the operating part is located on the radial outer periphery of the first and second connecting parts in the axial projection plane, so that the first and second connecting parts will not block the operating part, thereby facilitating the user to access the operating part and improving the efficiency of disassembling and assembling the gasket.
[0058] In some embodiments,
[0059] The first connecting portion 31 and the second connecting portion 12 are connected by a first threaded fastener 13. A screw hole 11 is provided on the gasket body 21 opposite to the first threaded fastener 13. The first threaded fastener 13 is provided through the screw hole 11. The screw hole 11 is a groove structure opened from the inner peripheral wall of the gasket body 21 toward the radial outward direction.
[0060] The utility model preferably fixes the first and second connecting parts together by a first threaded fastener, and the first threaded fastener is arranged through a screw hole on the gasket body, so as to fix the gasket. At the same time, the screw hole is a blind groove structure opened outward from the inner peripheral wall of the gasket body, and the gasket can be inserted between the first and second connecting parts from the radial outside to the radial inside, and the screw hole is inserted until the first threaded fastener extends into the screw hole, thereby effectively fixing the gasket structure.
[0061] In some embodiments,
[0062] The screw hole 11 is opposite to the operating part 22 in the radial direction and is located radially inside the operating part 22. The radial outer end of the screw hole 11 is spaced from the radial inner end of the operating part 22 by a preset distance greater than 0, so that the screw hole 11 is formed as a blind groove that is open at the radial inner end and closed at the radial outer end.
[0063] This is the preferred structural form of the screw hole of the utility model, that is, it is arranged on the radial inner side opposite to the operating part, and forms a blind groove with an open radial inner end and a closed radial outer end. By inserting the gasket between the first and second connecting parts from the radial outer side toward the radial inner side, and inserting the screw hole until the first threaded fastener extends into the screw hole, the gasket structure is effectively fixed. When disassembling, the gasket can be taken out in the radial outer direction, which makes disassembly and assembly more convenient. Moreover, the relative arrangement of the screw hole and the operating part can effectively extend the radial length of the screw hole, so that the first threaded fastener can be inserted deeper into the screw hole, further improving the stability of the fastening.
[0064] In some embodiments,
[0065] There are at least two screw holes 11, and at least two of the screw holes 11 are spaced apart in the circumferential direction of the gasket body 21. One of the screw holes 11 is opposite to the operating part 22 in the radial direction and is located radially inside the operating part 22. The radial outer end of the screw hole 11 is spaced apart from the radial inner end of the operating part 22 by a preset distance greater than 0, so that the screw hole 11 is formed as a blind groove that is open at the radial inner end and closed at the radial outer end; the other screw holes 11 are not opposite to the operating part 22 in the radial direction, and are all blind groove structures in the radial direction.
[0066] This is the preferred structural form of the screw hole of the utility model, that is, it is formed into a plurality of screw holes spaced apart in the circumferential direction, one of the screw holes is arranged on the radial inner side opposite to the operating part, and forms a blind groove with a radial inner end open and a radial outer end closed, so that the gasket structure can be effectively fixed by inserting the gasket from the radial outer side toward the radial inner side between the first and second connecting parts, and inserting the screw hole until the first threaded fastener extends into the screw hole. When disassembling, the gasket can be taken out in the radial outer direction, which makes disassembly and assembly more convenient; and the relative arrangement of the screw hole and the operating part can effectively extend the radial length of the screw hole, so that the first threaded fastener is inserted into the screw hole deeper, further improving the stability of the fastening; the other screw holes are not opposite to the operating part, and multiple screw holes can be arranged one by one in coordination with the first threaded fastener, further improving the fastening between the volute and the collector.
[0067] In some embodiments,
[0068] It also includes an impeller 5, and the collector 1 also includes a mating section 14 arranged on the radial inner side of the first connecting portion 31. At least part of the structure of the impeller 5 is also arranged on the radial inner side of the mating section 14. The mating section 14 cooperates with the impeller 5 to drive and pressurize the airflow.
[0069] The present invention also sets the mating section of the collector to the radial outer side of the impeller, which can define the path and channel of the air flow together with the impeller, thereby pressurizing and / or accelerating the air flow, and realizing the effect of impeller rotation on air flow pressurization and / or speed increase.
[0070] In some embodiments,
[0071] It also includes a cylinder 4 and a rotor 6. The volute 3 also includes a diffuser section 32 located at the radial outer end. The diffuser section 32 has an internal diffuser cavity 33. The airflow compressed by the impeller 5 can enter the internal diffuser cavity 33. The diffuser section 32 is connected to the cylinder 4 in the axial direction. The two are fastened by a second threaded fastener 15. The rotor 6 is arranged inside the cylinder 4.
[0072] The utility model can also connect with the expansion section of the volute through the cylinder to fix the volute. The expansion section of the volute is connected to the impeller, so that the airflow compressed or accelerated by the impeller can be expanded. The second threaded fastener realizes the fastening connection between the cylinder and the expansion section of the volute.
[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. Such improvements and variations shall also be considered within the scope of protection of the present invention.
Claims
1. A magnetic suspension centrifugal blower with adjustable gap, characterized in that: include: A collector (1), a volute (3) and an adjustment gasket (2), wherein the magnetic levitation centrifugal blower has an axial direction, the volute (3) has a first connection portion (31) protruding and extending in the axial direction, the collector (1) has a second connection portion (12) connected to the first connection portion (31) in the axial direction, and adjustment gaskets (2) of different thicknesses and / or different numbers of layers of adjustment gaskets (2) can be arranged between the first connection portion (31) and the second connection portion (12), the adjustment gasket (2) comprises a gasket body (21) and an operating portion (22), the gasket body (21) is located between the first connection portion (31) and the second connection portion (12) and is respectively connected to the first connection portion (31) and the second connection portion (12), and the operating portion (22) is connected to the outer periphery of the gasket body (21) and is arranged to protrude outward.
2. The magnetic suspension centrifugal blower with adjustable gap according to claim 1, characterized in that: The adjusting gasket (2) comprises a multi-segmented structure spaced apart in the circumferential direction, and each layer of the adjusting gasket (2) is divided into 2 to 4 segments in the circumferential direction; the number of layers of the adjusting gasket (2) is 3 to 8; and the thickness of each layer of the adjusting gasket (2) is in the range of 0.1 to 0.6 mm.
3. The magnetic suspension centrifugal blower with adjustable gap according to claim 2, characterized in that: The adjusting gasket (2) of the multi-segmented structure comprises an adjusting gasket 1 (7), an adjusting gasket 2 (8), an adjusting gasket 3 (9) and an adjusting gasket 4 (10) in the circumferential direction, wherein the adjusting gasket 1 (7), the adjusting gasket 2 (8), the adjusting gasket 3 (9) and the adjusting gasket 4 (10) are sequentially spaced in the circumferential direction, and the adjusting gasket 1 (7), the adjusting gasket 2 (8), the adjusting gasket 3 (9) and the adjusting gasket 4 (10) all comprise a gasket body (21) and an operating portion (22).
4. The magnetic suspension centrifugal blower with adjustable gap according to claim 2, characterized in that: In the projection plane in the axial direction, the gasket body (21) of each segmented adjustment gasket is an arc-shaped ring structure, the radial inner end of the operating portion (22) is connected to the outer periphery of the gasket body (21), the radial outer end of the operating portion (22) protrudes radially outward, and the operating portion (22) is triangular in shape.
5. The magnetic suspension centrifugal blower with adjustable gap according to claim 1, characterized in that: The operating portion (22) is not opposite to the first connecting portion (31) in the axial direction, and the operating portion (22) is not opposite to the second connecting portion (12) in the axial direction. In the projection plane in the axial direction, the operating portion (22) is located on the radial outer periphery of the first connecting portion (31) and also on the radial outer periphery of the second connecting portion (12).
6. The magnetic suspension centrifugal blower with adjustable gap according to claim 1, characterized in that: The first connecting portion (31) and the second connecting portion (12) are connected via a first threaded fastener (13); a screw hole (11) is provided on the gasket body (21) opposite to the first threaded fastener (13); the first threaded fastener (13) is provided through the screw hole (11); and the screw hole (11) is a groove structure opened from the inner peripheral wall of the gasket body (21) toward the radial outer side.
7. The magnetic suspension centrifugal blower with adjustable gap according to claim 6, characterized in that: The screw hole (11) is opposite to the operating portion (22) in the radial direction and is located radially inside the operating portion (22). The radial outer end of the screw hole (11) is spaced from the radial inner end of the operating portion (22) by a preset distance greater than 0, so that the screw hole (11) is formed as a blind groove that is open at the radial inner end and closed at the radial outer end.
8. The magnetic suspension centrifugal blower with adjustable gap according to claim 6, characterized in that: There are at least two screw holes (11), and at least two of the screw holes (11) are spaced apart in the circumferential direction of the gasket body (21), one of the screw holes (11) is opposite to the operating portion (22) in the radial direction and is located radially inside the operating portion (22), and the radial outer end of the screw hole (11) is spaced apart from the radial inner end of the operating portion (22) by a preset distance greater than 0, so that the screw hole (11) is formed into a blind groove that is open at the radial inner end and closed at the radial outer end; the other screw holes (11) are not opposite to the operating portion (22) in the radial direction, and all are blind groove structures in the radial direction.
9. The magnetic suspension centrifugal blower with adjustable gap according to claim 1, characterized in that: The impeller (5) is also included, and the collector (1) further includes a matching section (14) arranged radially inwardly of the first connecting portion (31), at least a portion of the structure of the impeller (5) is also arranged radially inwardly of the matching section (14), and the matching section (14) cooperates with the impeller (5) to drive, pressurize and / or accelerate the airflow.
10. The magnetic suspension centrifugal blower with adjustable gap according to claim 9, characterized in that: The volute (3) further comprises a cylinder (4) and a rotor (6), the volute (3) further comprising a diffuser section (32) located at the radial outer end, the diffuser section (32) having an internal diffuser cavity (33), the airflow compressed by the impeller (5) can enter the internal diffuser cavity (33), the diffuser section (32) is connected to the cylinder (4) in the axial direction, and the two are fastened by a second threaded fastener (15), and the rotor (6) is arranged inside the cylinder (4).