Flow regulation device and compressor

Abstract

The invention relates to a flow adjusting device and a compressor, and the flow adjusting device comprises a fixed disc which is provided with an air inlet; the multiple adjusting units are sequentially arranged in the circumferential direction of the air inlet and connected with the fixing disc, the multiple adjusting units jointly define a barrel-shaped structure, and the barrel-shaped structure is provided with an air inlet channel communicated with the air inlet; the driving assembly is installed on the fixing disc and comprises an adjusting ring capable of moving in the axial direction of the air inlet channel relative to the fixing disc, the adjusting ring is arranged on the peripheral surface of the cylindrical structure in a sleeving mode, and in the axial direction of the air inlet channel, the inner ring face of the adjusting ring is in sliding fit with the side face, away from the air inlet channel, of each adjusting unit; wherein the adjusting unit is an elastic piece, and the inner diameter of the adjusting ring is smaller than that of the air inlet. According to the flow adjusting device, all the adjusting units can move synchronously, it is guaranteed that the air inlet channel is always kept to be close to a circle, pressure loss is low, the structure is simple, and operation and control are easy and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor equipment, and in particular, to a flow regulating device and a compressor. Background Art

[0002] Surge is an inherent characteristic of centrifugal compressors, which limits the operating range of air compressors and poses a threat to the stable operation and safety of equipment. For centrifugal water-cooled units, the constant temperature unloading capacity is an important indicator to measure their performance, and the surge margin is the key factor determining their unloading capacity.

[0003] Currently, the most common methods for expanding and stabilizing the surge margin of centrifugal air compressors are inlet throttling and inlet guide vanes. The former throttles the flow by placing a valve in the compressor inlet duct to adjust the flow rate, but this method has a large throttling loss and low energy efficiency. The variable inlet guide vane (VIGV) sets a series of rotatable blades at the inlet, and pre-rotates the incoming flow at different angles according to the flow rate demand to improve the inlet attack angle of the centrifugal impeller at low flow rates and delay the occurrence of separation and surge.

[0004] However, the variable inlet guide vane has problems such as a small flow regulation range, large frictional surface area and frictional loss due to the narrow flow channels divided by the blades, poor flow regulation effect, and complex operation and control. Summary of the Invention

[0005] The object of the present invention is to at least solve the problems in the prior art such as small flow regulation range, large loss, and complex operation and control. This object is achieved in the following ways:

[0006] A first aspect of the present invention provides a flow regulating device, which includes: a fixed disk provided with an air inlet; a plurality of regulating units sequentially arranged circumferentially around the air inlet and respectively connected to the fixed disk, and the plurality of regulating units together enclose a cylindrical structure having an air inlet passage communicating with the air inlet; a driving assembly installed on the fixed disk, the driving assembly including an adjusting ring capable of axially moving along the air inlet passage relative to the fixed disk, the adjusting ring being sleeved on the outer peripheral surface of the cylindrical structure, and along the axial direction of the air inlet passage, the inner ring surface of the adjusting ring is in sliding fit with the side surface of each regulating unit facing away from the air inlet passage; wherein, the regulating unit is an elastic member, and the regulating unit is configured to be in an elastically deformed state, and the resilience of the regulating unit drives the regulating unit to abut against the inner ring surface, and the inner diameter size of the adjusting ring is smaller than the inner diameter size of the air inlet.

[0007] According to the flow regulating device of the present invention, by means of driving all the regulating units through the regulating ring, each regulating unit can move synchronously, ensuring that the shape of the air inlet passage always remains close to a circular shape, with low pressure loss, and the structure is simple, and the operation and control are convenient.

[0008] In addition, the flow regulating device according to the present invention may further have the following additional technical features:

[0009] In some embodiments of the present invention, along the circumferential direction of the air inlet passage, partial regions of any two adjacent regulating units overlap.

[0010] In some embodiments of the present invention, the regulating unit includes a regulating piece and a sealing member. Among all the regulating units, all the regulating pieces are sequentially arranged at intervals along the circumferential direction of the air inlet passage, and the regulating pieces and the sealing members are alternately arranged in sequence along the circumferential direction of the air inlet passage. Any sealing member is respectively connected to two adjacent regulating pieces adjacent to the sealing member to seal the gap between two adjacent regulating pieces.

[0011] In some embodiments of the present invention, the sealing member includes a sealing piece. Along the circumferential direction of the air inlet passage, among one sealing piece and two adjacent regulating pieces adjacent to the sealing piece, one side edge of the sealing piece overlaps with one regulating piece, and the other side edge of the sealing piece overlaps with the other regulating piece.

[0012] In some embodiments of the present invention, along the axial direction of the air inlet passage, the end of the regulating piece facing away from the fixed disk is provided with a flanging structure, and the flanging structure has a first sliding groove extending along the circumferential direction of the air inlet passage;

[0013] Along the radial direction of the air inlet passage, the sealing piece is arranged on the side of the regulating piece facing away from the air inlet passage and is in contact with the regulating piece, and along the axial direction of the air inlet passage, the end of the sealing piece facing away from the fixed disk is in sliding fit with the first sliding groove.

[0014] In some embodiments of the present invention, along the circumferential direction of the air inlet passage, one sealing piece is in sliding fit with the first sliding grooves on two adjacent regulating pieces adjacent to the sealing piece.

[0015] In some embodiments of the present invention, along the air flow direction of the air inlet passage, the width dimension of the regulating piece gradually decreases, and the width dimension of the sealing piece gradually increases, where the width dimension refers to the dimension of the regulating piece or the sealing piece along the circumferential direction of the air inlet passage.

[0016] In some embodiments of the present invention, both the regulating piece and the sealing piece are shape memory alloy parts.

[0017] In some embodiments of the present invention, the adjusting piece includes an adjusting main body and an adjusting connecting body that are connected and arranged at an angle, and the adjusting connecting body is connected to the fixed disk; the sealing piece includes a sealing main body and a sealing connecting body that are connected and arranged at an angle, and the sealing connecting body is connected to the sealing main body; wherein, all the adjusting main bodies and the sealing main bodies jointly enclose and define the intake air passage, and along the axial direction of the intake air passage, the inner ring surface of the adjusting ring is in sliding fit with the adjusting main body, and / or, the inner ring surface of the adjusting ring is in sliding fit with the sealing main body.

[0018] In some embodiments of the present invention, along the air flow direction in the intake air passage, the inner diameter of the adjusting ring gradually decreases.

[0019] In some embodiments of the present invention, along the air flow direction in the intake air passage, the inner diameter of the adjusting ring remains unchanged, and the value range of the ratio R1 / R2 of the inner diameter R1 of the adjusting ring to the inner diameter R2 of the air inlet is 0.5 to 0.9;

[0020] Or, along the air flow direction in the intake air passage, the inner diameter of the adjusting ring gradually decreases, and the value range of the ratio R1 / R2 of the minimum inner diameter R1 of the adjusting ring to the inner diameter R2 of the air inlet is 0.5 to 0.9.

[0021] In some embodiments of the present invention, the driving assembly further includes a linkage unit installed on the fixed disk, and the linkage unit includes at least one driving member that can move relative to the fixed disk along the axial direction of the intake air passage, and the driving member is connected to the adjusting ring.

[0022] In some embodiments of the present invention, the linkage unit includes a plurality of driving members, and the driving members are configured as rod-shaped driving rods, and each driving rod is respectively hinged to the adjusting ring.

[0023] According to the second aspect of the present invention, a compressor is further proposed, including the flow rate adjusting device as described in the first aspect; the compressor further includes a volute and an impeller arranged in the volute, the fixed disk is fixedly installed on the volute, and along the axial direction of the intake air passage, the air outlet of the intake air passage is oppositely arranged with the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. Among them:

[0025] Figure 1 It is a schematic structural diagram of the flow rate adjusting device from the front view perspective of an embodiment of the present invention;

[0026] Figure 2 Structural schematic diagram of the regulating piece according to an embodiment of the present invention;

[0027] Figure 3 Structural schematic diagram of the sealing piece according to an embodiment of the present invention;

[0028] Figure 4 Structural schematic diagram of the fixed disk according to an embodiment of the present invention;

[0029] Figure 5 Structural schematic diagram of the adjusting ring according to an embodiment of the present invention;

[0030] Figure 6 Partial structural schematic diagram of the compressor according to an embodiment of the present invention;

[0031] Figure 7 is Figure 6 Cross-sectional structural schematic diagram of part B-B in

[0032] Figure 8 Curve graph of pressure ratio and relative flow rate when the compressor according to an embodiment of the present invention operates;

[0033] Figure 9 Partial cross-sectional structural schematic diagram of the compressor according to another embodiment of the present invention.

[0034] Each label in the drawings represents as follows:

[0035] 62, Flow regulating device;

[0036] 621, Fixed disk; 6211, Air inlet; 6218, Through hole; 6219, Boss structure; 6210, First sliding hole;

[0037] 622, Adjusting unit; 6220, Air inlet channel; 6221, Regulating piece; 62219, Flanging structure; 622191, First sliding groove; 62216, Adjusting main body; 62217, Adjusting connecting body; 62201, Air outlet port;

[0038] 6222, Sealing member; 62221, Sealing piece; 622216, Sealing main body; 622217, Sealing connecting body;

[0039] 623, Driving assembly; 6232, Linkage unit; 62321, Adjusting ring; 62322, Driving rod;

[0040] 1, Compressor;

[0041] 210, Volute; 2101, Installation cavity; 2102, Compression cavity; 2103, Installation groove; 2104, Connection hole; 510, Impeller; 2105, Second sliding hole. Detailed implementation manners

[0042] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0043] It should be understood that the terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing" and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0044] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms do not imply an order or sequence when used herein. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0045] In this application, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure relative to another element or feature. These relative relationship terms are, for example, "inner", "outer", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation other than the orientations depicted in the figure. For example, if the device in the figure rotates, an element described as "below" or "beneath" other elements or features will subsequently be oriented as "above" or "over" other elements or features. Therefore, the exemplary term "below" may include both upper and lower orientations.

[0047] According to an embodiment of the present invention, a flow rate regulating device is provided. Please refer to Figure 1 , Figure 4 and Figure 7 . As shown, the flow rate regulating device 62 includes a fixed disk 621, a plurality of regulating units 622, and a driving assembly 623.

[0048] Specifically, the fixed disk 621 has an annular plate-like structure. The fixed disk 621 is the basic supporting component of the entire flow rate regulating device 62, providing an installation carrier for the regulating units 622 and the driving assembly 623. The inner ring contour of the fixed disk 621 encloses an air inlet 6211. The fixed disk 621 is used to be installed on the volute 210 of the compressor 1, and the air inlet 6211 is the suction inlet of the compressor 1. A plurality of regulating units 622 are sequentially arranged circumferentially around the air inlet 6211. Each regulating unit 622 is respectively connected to the fixed disk 621, and all the regulating units 622 enclose and define an air inlet passage 6220 that communicates with the air inlet 6211. The shape and structure of the regulating unit 622 can be set as a fan-shaped plate-like structure or a plate-like member with a certain bending curvature. The bending direction of the regulating unit 622 is bent in the circumferential direction around the air inlet 6211, so that all the regulating units 622 form an approximately cylindrical structure, thereby defining the air inlet passage 6220 located inside the cylindrical structure, and the regulating ring 62321 is sleeved on the outer peripheral surface of the cylindrical structure.

[0049] The air inlet passage 6220 communicates with the inner cavity of the volute 210. An impeller 510 is installed in the inner cavity of the volute 210, and the impeller 510 is used to compress the air in the inner cavity of the volute 210. Among them, the axis of the air inlet passage 6220 is parallel to the axis of the impeller 510, or the axis of the air inlet passage 6220 coincides with the axis of the impeller 510. Along the axis of the air inlet passage 6220, the air outlet of the air inlet passage 6220 is oppositely arranged with the impeller 510, ensuring that air can smoothly flow from the air inlet passage 6220 into the inner cavity of the volute 210 where the impeller 510 is located for compression processing.

[0050] AsFigure 1 , Figure 4 and Figure 5 As shown in Figure 1 , Figure 4 and Figure 5 , the driving component 623 is installed on the fixed disk 621. The driving component 623 includes an adjusting ring 62321. The adjusting ring 62321 is disposed around all the adjusting units 622. The adjusting ring 62321 can move axially along the intake passage 6220 relative to the fixed disk 621. And the inner ring surface of the adjusting ring 62321 is slidably abutted against the side surface of each adjusting unit 622 facing away from the intake passage 6220. The inner ring surface of the adjusting ring 62321 can be configured as a smooth curved surface to facilitate the sliding contact with the adjusting unit 622. The inner diameter dimension of the adjusting ring 62321 is smaller than the inner diameter dimension of the air inlet 6211, and can exert a radial extrusion effect on the adjusting unit 622. The adjusting unit 622 is an elastic member. The adjusting unit 622 is configured to be in an elastically deformed state, and the resilience of the adjusting unit 622 drives the adjusting unit 622 to abut against the inner ring surface of the adjusting ring 62321.

[0051] When the driving component 623 works, it drives the adjusting ring 62321 to move axially along the intake passage 6220. Since the inner diameter of the adjusting ring 62321 is smaller than the inner diameter of the air inlet 6211 and the inner ring surface abuts against the adjusting unit 622, when the adjusting ring 62321 moves upstream of the intake passage 6220 (i.e., the end close to the fixed disk 621), it will exert a radial extrusion on the adjusting unit 622, causing the adjusting unit 622 to undergo elastic deformation, and further causing the outlet port 62201 of the intake passage 6220 to shrink, reducing the air inflow; when the adjusting ring 62321 moves downstream of the intake passage 6220 (i.e., the end close to the impeller 510), the extrusion effect on the adjusting unit 622 weakens, and the adjusting unit 622 resets under its own elastic restoring force or the action of the air flow pressure, and the outlet port 62201 expands, increasing the air inflow. By precisely controlling the axial movement distance of the adjusting ring 62321, continuous and precise adjustment of the size of the outlet port 62201 of the intake passage 6220 is achieved, meeting the requirements for the intake air flow under different working conditions.

[0052] Compared with the traditional intake throttling or adjustable inlet guide vane (VIGV) adjustment method, the flow rate adjustment device 62 proposed by the present invention can achieve fine adjustment of the intake air flow through the axial movement of the adjusting ring, can realize the change of the effective aerodynamic throat area of the impeller 510, thereby providing a wider flow rate adjustment ability, precisely controlling the intake air flow within a large range, meeting the operation requirements of the compressor 1 under different working conditions, and improving the operation stability and adaptability of the compressor 1.

[0053] Moreover, compared with the complex variable inlet guide vane (VIGV) system, the flow regulating device 62 of the present invention has a simpler structure. Each blade of the VIGV requires special processing, and the system has many components, high costs, and a high failure rate. The regulating unit 622 of the flow regulating device 62 of the present invention has a regular shape, a simple manufacturing process, and a compact drive assembly 623, reducing the number of components and the manufacturing difficulty, lowering the manufacturing cost and maintenance cost of the equipment, while improving the reliability of the equipment and reducing the failure rate.

[0054] By means of driving all the regulating units 622 to bend and deform radially along the air inlet passage through the adjusting ring, each regulating unit 622 can bend and deform synchronously, and ensure that the shape of the air inlet passage 6220 always remains close to a circle, with low pressure loss: the throat cross-sectional shape of the adjusted air inlet passage 6220 is circular, without narrow channels, reducing the friction area and friction loss, thereby reducing the pressure loss and improving the efficiency of the system.

[0055] Moreover, the flow regulating device 62 proposed by the present invention can directly affect the throat of the air outlet port of the air inlet passage 6220, improving the flow regulation effect: the throat surface connection of the impeller 510 is the key factor affecting the flow range. The present invention directly affects the actual effective aerodynamic throat area of the centrifugal impeller 510, making the map move approximately proportionally left and right, with good regulation effect.

[0056] Among them, "map" refers to the operating characteristic diagram of a centrifugal compressor, also known as a performance map. It shows the operating performance of the centrifugal compressor under different working conditions. By measuring and plotting the operating map of the centrifugal compressor at different opening angles, the performance of the compressor under various working conditions can be comprehensively understood, and then the laws can be analyzed and extracted to achieve precise control of the centrifugal compressor.

[0057] The flow regulating device 62 proposed by the present invention adjusts the flow rate by changing the throat area of the air inlet passage 6220. The flow range has an approximately simple linear relationship with the throat area. The theory is clear and concise, the control logic is simple, and it is easy to operate and control. As shown in the attached Figure 8 figure, X represents the relative flow rate, Y represents the pressure ratio, a represents the pressure ratio - flow rate curve of the flow regulating device at 60% opening, b represents the pressure ratio - flow rate curve of the flow regulating device at 70% opening, c represents the pressure ratio - flow rate curve of the flow regulating device at 80% opening, d represents the pressure ratio - flow rate curve of the flow regulating device at 90% opening, e represents the pressure ratio - flow rate curve of the compressor proposed by the present invention without the flow regulating device; the dotted line indicated by f is the surge line of the compressor without the flow regulating device. It can be Figure 8 seen that the flow regulating device proposed by the present invention can expand the surge line towards a small flow rate by about 40% at 60% opening.

[0058] In some embodiments, please refer toFigure 1 , Figure 4 , Figure 6 and Figure 7 As shown in Figure 6 and Figure 7 , along the circumferential direction of the intake passage 6220, partial regions of any two adjacent adjustment units 622 overlap. Specifically, the overlapping manner can be in various forms. For example, the edge portions of adjacent adjustment units 622 overlap each other, the edge of one adjustment unit 622 covers the edge of another adjustment unit 622, and the overlapping portion of the two adjustment units 622 can be of equal width or gradually changing. The overlapping manner of two adjacent adjustment units 622 can ensure that when adjusting the size of the air outlet port, adjacent adjustment units 622 can cooperate closely with each other, playing a good sealing role and preventing air leakage from the gap between adjacent adjustment units 622.

[0059] In this embodiment, when it is necessary to increase the air outlet port, the adjusting ring is driven to move axially along the intake passage away from the fixed disk. During this process, two adjacent adjustment units 622 will gradually separate along the circumferential direction of the intake passage 6220, and the overlapping area between them will gradually decrease, but still maintain a certain degree of overlap to prevent air leakage from the gap. When it is necessary to decrease the air outlet port, the adjusting ring is driven to move towards the fixed disk. At this time, two adjacent adjustment units 622 will approach each other along the circumferential direction of the intake passage 6220, and the overlapping area will gradually increase, thereby effectively reducing the area of the air outlet port and precisely controlling the air flow rate entering the inner cavity of the volute 210.

[0060] Among them, the adjustment unit 622 can only include a plate-like member (not shown in the figure), or can be a component composed of two or more plate-like members. When the adjustment unit 622 only includes a plate-like member (not shown in the figure), multiple adjustment units 622 are arranged in sequence along the circumferential direction of the air inlet. Along the circumferential direction of the air inlet, there is an overlapping area between any two adjacent adjustment units 622 along the radial direction of the air inlet, so that in the process of either decreasing or increasing the air outlet port, the edges of two adjacent adjustment units 622 along the circumferential direction of the intake passage 6220 always overlap, preventing air leakage from the gap between adjacent adjustment units 622.

[0061] In some embodiments, as shown in Figure 1 , Figure 4 and Figure 7 , the adjustment unit 622 includes an adjustment piece 6221 and a sealing member 6222. The adjustment piece 6221 is connected to the fixed disk 621, so that the connection end of the adjustment piece 6221 and the fixed disk 621 can always remain fixed relative to the fixed disk, ensuring the stability of the cylindrical structure formed by enclosing multiple adjustment units 622.

[0062] ​​​​​​Among all the adjusting units 622, all the adjusting vanes 6221 are arranged at intervals in sequence along the circumferential direction of the air inlet passage 6220, and the adjusting vanes 6221 and the seals 6222 are arranged alternately in sequence along the circumferential direction of the air inlet passage 6220. Any seal 6222 is connected to two adjacent adjusting vanes 6221 adjacent to the seal 6222 to seal the gap between two adjacent adjusting vanes 6221.

[0063] Among them, the material of the seal 6222 is the same as or different from that of the adjusting vane 6221.

[0064] For example, in some embodiments, both the adjusting vane 6221 and the seal 6222 are metal parts.

[0065] Again, in some other embodiments, the adjusting vane 6221 is a metal part, and the seal 6222 is a device with certain elastic deformation ability and high strength. For example, a rubber part or a composite material seal 6222, etc. The two side edges of the seal 6222 along the circumferential direction of the air inlet passage 6220 are respectively fixedly connected to two adjusting vanes 6221 (not shown in the figure), for example, by bonding or bolt connection, etc., to ensure that the seal 6222 can be firmly connected between two adjusting vanes 6221. When adjusting the size of the air outlet port of the air inlet passage 6220, the elastic deformation of the seal 6222 itself is utilized to adapt to the change of the gap size between two adjacent adjusting vanes 6221, so as to ensure that the seal 6222 can always seal the gap between two adjacent adjusting vanes 6221. Among them, the composite material can be made by compounding a variety of materials. For example, fiber reinforcing materials are added to a rubber matrix, or a composite structure of metal and rubber is adopted, which has both good elasticity and sealing performance, and high strength and durability.

[0066] In some embodiments, please refer to Figure 1 、 Figure 4 and Figure 7 As shown, the seal 6222 includes a sealing piece 62221. Both the sealing piece 62221 and the adjusting vane 6221 are metal parts. The adjusting vane 6221 and the sealing piece 62221 are arranged alternately in sequence along the circumferential direction of the air inlet 6211. The sealing piece 62221 is located between two adjacent adjusting vanes 6221. All the adjusting vanes 6221 and the sealing pieces 62221 form a continuous cylindrical structure along the circumferential direction of the air inlet 6211 to define the air inlet passage 6220.

[0067] Circumferentially along the intake passage 6220, for a sealing piece 62221 and its two adjacent adjusting pieces 6221, the sealing piece 62221 is located between the two adjusting pieces 6221, and one side edge of the sealing piece 62221 overlaps with one adjusting piece 6221, and the other side edge overlaps with the other adjusting piece 6221, so that the sealing piece 62221 can form a tight connection between the adjacent adjusting pieces 6221, and at the same time, it also ensures that the sealing piece 62221 can always maintain the sealing function during the process of changing the size of the air outlet port.

[0068] In some embodiments, please refer to Figure 1 、 Figure 2 and Figure 3 As shown, a flanging structure 62219 is provided at the end of the adjusting piece 6221 facing away from the fixed disk 621. The end of the adjusting piece 6221 facing away from the fixed disk 621 is folded 180 degrees towards the fixed disk 621 to form a flanging structure 62219 similar to a "U" shape. The end of the flanging structure 62219 facing the fixed disk 621 is open, so that the space defined inside the flanging structure 62219 is the first sliding groove 622191. Such a setting enables the adjusting piece 6221 to integrate the first sliding groove 622191 structure while having the basic adjusting function, simplifying the overall structural design.

[0069] The sealing piece 62221 is a sheet-like component. The shape and size of the sealing piece 62221 are adapted to the adjusting piece 6221. Radially along the intake passage 6220, the sealing piece 62221 is arranged on the side of the adjusting piece 6221 facing away from the intake passage 6220 and is in contact with the adjusting piece 6221. Axially along the intake passage 6220, the end of the sealing piece 62221 facing away from the fixed disk 621 is slidably inserted into the first sliding groove 622191. While realizing the sealing function, it does not affect the rotational adjustment of the adjusting piece 6221. When the adjusting piece 6221 rotates in the direction of increasing the air outlet port 62201, the sealing piece 62221 slides circumferentially in the first sliding groove 622191 while maintaining contact with the adjusting piece 6221 to maintain the sealing of the gap between the two. When the adjusting piece 6221 rotates in the direction of decreasing the air outlet port 62201, the sealing piece 62221 also slides correspondingly in the first sliding groove 622191 and always closely adheres to the adjusting piece 6221, ensuring that the gap between adjacent adjusting pieces 6221 can be effectively sealed during the entire adjustment process, preventing air leakage and ensuring the precise adjustment of the intake air flow.

[0070] The way that the sealing piece 62221 is in sliding fit with the first sliding groove 622191 provides a certain guiding and constraining effect on the relative movement between the adjusting piece 6221 and the sealing piece 62221, making the adjusting piece 6221 more stable during rotation, reducing shaking and deviation, ensuring the accuracy of the adjusting action, and thus enabling more precise control of the size of the air outlet port 62201 to meet the strict requirements for the intake air flow under different working conditions.

[0071] Furthermore, along the circumferential direction of the intake passage 6220, one sealing piece 62221 is respectively slidably inserted into the first sliding grooves 622191 on two adjacent adjusting pieces 6221 to the sealing piece 62221. That is, along the circumferential direction of the intake passage 6220, the sealing piece 62221 is connected to two adjacent adjusting pieces 6221. When the adjusting piece 6221 rotates to adjust the size of the air outlet port 62201, the sealing piece 62221 can play a certain restraining role on the two adjacent adjusting pieces 6221, making their rotation more synchronous and stable. This helps to reduce the shaking and deviation between the adjusting pieces 6221, improve the smoothness and accuracy of the entire adjustment process, ensure that the intake air flow can be accurately adjusted as expected, and meet the strict requirements for the intake air volume of the compressor 1 under different working conditions.

[0072] Moreover, the connection between the sealing piece 62221 and the two adjusting pieces 6221 increases the integrity and stability of the entire cylindrical structure. During the operation of the compressor 1, when subjected to air flow impact or other external forces, it can better disperse the acting force, reduce the stress borne by a single adjusting piece 6221 or sealing piece 62221, lower the risk of component damage, thereby improving the structural strength and reliability of the entire flow regulating device 62, extending its service life, and reducing the frequency and cost of equipment maintenance and component replacement.

[0073] In this embodiment, please refer to Figure 1 、 Figure 4 and Figure 7As shown, along the air flow direction of the intake passage 6220, the width dimension of the adjusting vane 6221 gradually decreases. Since all the adjusting vanes 6221 are arranged at intervals in sequence along the circumferential direction of the air inlet 6211, and the through direction of the air inlet 6211 is parallel to the axial direction of the intake passage 6220, there is a certain interval distance along the circumferential direction of the air inlet 6211 between any two adjacent adjusting vanes 6221. Also, when adjusting the size of the outlet port of the intake passage 6220, the respective adjusting vanes 6221 approach or move away from each other. Therefore, the end of the adjusting vane 6221 facing away from the fixed disk 621 has a larger range of movement compared to the end of the adjusting vane 6221 close to the fixed disk 621. Setting the width dimension of the adjusting vane 6221 to gradually decrease along the air flow direction of the intake passage 6220 enables a larger spacing dimension between the ends of two adjacent adjusting vanes 6221 facing away from the fixed disk 621, avoiding mutual contact between two adjacent adjusting vanes 6221 during the adjustment process and ensuring a smoother process of adjusting the size of the outlet port.

[0074] Furthermore, the width dimension of the sealing vane 62221 gradually increases. As the width of the adjusting vane 6221 decreases, the width of the sealing vane 62221 increases. During the process of adjusting the size of the outlet port, the sealing vane 62221 can better fill the gap changes generated due to the rotation between adjacent adjusting vanes 6221. Especially in the case of a reduced throat, the wider part of the sealing vane 62221 can better cover the gap between the adjusting vanes 6221 to prevent air leakage. Moreover, this gradually changing width setting enables the sealing vane 62221 to maintain good fit with the adjusting vane 6221 at different adjustment angles, further improving the sealing performance and ensuring that the compression efficiency of the compressor 1 is not affected.

[0075] Among them, the width dimension refers to the dimension of the adjusting vane 6221 or the sealing vane 62221 along the circumferential direction of the intake passage 6220.

[0076] In this embodiment, the adjusting piece 6221 and the sealing piece 62221 are shape memory alloy components. The shape recovery characteristic of the shape memory alloy enables the sealing piece 62221 to always fit tightly with the adjusting piece 6221 under different working conditions, and can automatically adjust the sealing position and method according to the rotation and deformation of the adjusting piece 6221. Even when the adjusting piece 6221 is deformed to a certain extent due to long-term use or force, the sealing piece 62221 can also adaptively maintain a good sealing state through the shape memory effect, effectively preventing air leakage and improving the compression efficiency and energy utilization rate of the compressor 1. Moreover, since the shape memory alloy component can automatically adjust its shape according to environmental conditions, there is no need for an additional complex mechanical transmission device or control system to drive the actions of the adjusting piece 6221 and the sealing piece 62221. This simplifies the structural design of the air inlet 6220 of the compressor 1, reduces the number of components, lowers the complexity and cost of the equipment, and at the same time improves the stability and maintainability of the system.

[0077] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 3As shown, the adjustment sheet 6221 includes an adjustment body 62216 and an adjustment connecting body 62217 which are connected and set at an angle. The adjustment body 62216 and the adjustment connecting body 62217 are both plate-like structures. The end surface of the fixed disk 621 facing the downstream of the air inlet duct 6220 is attached to and connected to the adjustment connecting body 62217. The adjustment body 62216 is folded relative to the adjustment connecting body 62217 toward the side away from the fixed disk 621. The adjustment body 62216 and the adjustment connecting body 62217 are an integrated structure. The sealing sheet 62221 includes a sealing body 622216 and a sealing connector 622217 which are connected and arranged at an angle. The sealing body 622216 and the sealing connector 622217 are both plate-shaped structures. The sealing connector 622217 is fitted with a side of the adjusting connector 62217 which faces away from the fixed plate 621. The sealing body 622216 is fitted with a side of the adjusting body 62216 which faces away from the air inlet 6220. All the adjusting bodies 62216 and the sealing body 622216 together enclose and define the air inlet 6220. The inner annular surface of the adjusting ring 62321 and the side of the adjusting body 62216 which faces away from the air inlet 6220 can slide and abut against each other. Alternatively, in other embodiments, the inner annular surface of the adjusting ring 62321 and the side of the sealing body 622216 which faces away from the air inlet 6220 can slide and abut against each other. Alternatively, in some other embodiments, the inner ring surface of the adjustment ring 62321 includes a plurality of first butt joint surfaces and a plurality of second butt joint surfaces, the number of the first butt joint surfaces is equal to the number of the second butt joint surfaces and they are arranged alternately in sequence along the circumference of the adjustment ring 62321. The number of the first butt joint surfaces is also equal to the number of the adjustment sheets 6221, and the first butt joint surfaces correspond one-to-one with the adjustment body 62216 and can slide against the side of the adjustment body 62216 away from the air inlet 6220. The second butt joint surfaces correspond one-to-one with the sealing body 622216, and the second butt joint surfaces correspond one-to-one with the sealing body 622216 and can slide against the side of the sealing body 622216 away from the air inlet 6220.

[0078] When the adjustment ring 62321 moves axially along the air inlet 6220, the adjustment ring 62321 applies radial pressure to the adjustment plate 6221 or the sealing plate 62221 through the inner ring surface, and the sealing body 622216 is bent and deformed relative to the sealing connector 622217 along the radial direction of the air inlet 6220 under the action of the radial pressure. At the same time, the adjustment body 62216 is bent and deformed relative to the adjustment connector 62217 along the radial direction of the air inlet 6220 under the action of the radial pressure, so that the sealing body 622216 and the adjustment body 62216 are rotated as a whole toward the center of the air inlet 6220, or the sealing body 622216 and the adjustment body 62216 are rotated as a whole toward the center of the air inlet 6220, thereby changing the size of the air outlet port 62201 of the air inlet 6220.

[0079] In this embodiment, the folding structure is provided at one end of the adjustment main body 62216 away from the adjustment connecting body 62217.

[0080] In some embodiments, please refer to Figure 1 , Figure 5 and Figure 7 As shown, along the air flow direction in the air inlet passage 6220, the inner diameter of the adjustment ring 62321 gradually decreases. The adjustment ring 62321 intercepts a first cross-section of the adjustment ring 62321 along its own axis. The contour of the first cross-section is a right trapezoid, and the hypotenuse of the right trapezoid is the contour line of the inner ring surface of the adjustment ring 62321 on the first cross-section. Such a setting is beneficial to increasing the contact area between the inner ring surface of the adjustment ring 62321 and the sealing piece 62221 or the adjustment piece 6221. A larger contact area makes the force transmission more uniform and stable when the adjustment ring 62321 pushes the sealing piece 62221 or the adjustment piece 6221. Moreover, the inclined setting of the inner ring surface of the adjustment ring 62321 also has a guiding effect, making the movement of the adjustment ring 62321 relative to the adjustment piece 6221 and the sealing piece 62221 smoother.

[0081] In this embodiment, as Figure 7 shown, the value range of the ratio R1 / R2 of the minimum inner diameter R1 of the adjustment ring 62321 to the inner diameter R2 of the air inlet 6211 is 0.5 - 0.9. For example, R1 / R2 can be 0.5, 0.6, 0.7, 0.8, 0.9, etc. By reasonably adjusting the intake air flow, the compressor 1 can accurately inhale an appropriate amount of air according to the actual working requirements, avoiding excessive compression or insufficient compression of the air, thereby improving the energy utilization efficiency of the compressor 1.

[0082] In some other embodiments, the inner diameter of the adjustment ring is an equal-diameter structure. Along the air flow direction in the air inlet passage, the inner diameter of the adjustment ring 62321 remains unchanged. The value range of the ratio R1 / R2 of the inner diameter R1 of the adjustment ring 62321 to the inner diameter R2 of the air inlet 6211 is 0.5 - 0.9. For example, R1 / R2 can be 0.5, 0.6, 0.7, 0.8, 0.9, etc. By reasonably adjusting the intake air flow, the compressor 1 can accurately inhale an appropriate amount of air according to the actual working requirements, avoiding excessive compression or insufficient compression of the air, thereby improving the energy utilization efficiency of the compressor 1.

[0083] In some embodiments, please refer to Figure 1 , Figure 4 and Figure 7As shown, the driving component 623 further includes a linkage unit 6232. The linkage unit 6232 is installed on the fixed disk 621. The linkage unit includes at least one driving member that can move relative to the fixed disk along the axial direction of the air inlet passage. The driving member is connected to the adjusting ring. When the driving member moves axially along the air inlet passage 6220, it drives the adjusting ring to move at the same time, and drives the adjusting body and the sealing body to rotate relative to the fixed disk 621 along the radial direction of the air inlet passage 6220 through the adjusting ring, so as to realize the adjustment of the size of the air outlet port of the air inlet passage 6220. The driving member and the adjusting ring can play a role in overall coordination of multiple adjusting units 622, ensuring that all adjusting units 622 can move synchronously to achieve the purpose of accurately adjusting the air intake flow rate.

[0084] Specifically, the linkage unit 6232 can be set in a variety of different structural forms. For example, in some exemplary embodiments, the main body of the driving member is a slider structure (not shown in the figure). The linkage unit 6232 further includes a guide rail provided on the fixed disk 621 and parallel to the axial direction of the air inlet passage 6220. The slider cooperates with the guide rail, and the slider is driven to slide on the guide rail by a power source such as a motor or a cylinder, and then the slider drives the adjusting ring to move. The structure of the slide rail and slider can withstand a large lateral force. In other exemplary embodiments, the linkage unit 6232 is set as a lead screw and nut mechanism (not shown in the figure), that is, the linkage unit 6232 includes a plurality of lead screws (not shown in the figure) and a plurality of nuts (not shown in the figure). The driving member is the nut, the adjusting ring is fixedly connected to the nut, the lead screw is rotatably installed on the fixed disk 621, and the nut moves linearly along the axis direction of the lead screw (that is, the axial direction of the air inlet passage 6220). The lead screw and nut mechanism has high transmission accuracy and can achieve precise displacement control, so as to accurately adjust the size of the air outlet port. At the same time, the lead screw and nut mechanism has a certain self-locking performance. After being adjusted to the appropriate position, it can remain stable and prevent the position of the adjusting unit 622 from changing due to external force interference.

[0085] In some embodiments, please refer to Figure 1 、 Figure 6 and Figure 7 As shown, the linkage unit 6232 includes a plurality of driving members. The driving members are configured as rod-shaped driving rods 62322. Each driving rod 62322 is respectively hinged to the adjusting ring 62321. The driving rod 62322 extends along the axial direction of the air inlet passage 6220 and passes through the air inlet 6211. One end of the driving rod 62322 is located outside the air inlet 6211, and the other end of the driving rod 62322 sequentially passes through part of the air inlet passage 6220 and the sealing piece 62221 and is hinged to the adjusting ring 62321.

[0086] In this embodiment, the driving rod 62322 is connected to the power source by transmission, and the power source can be a driving motor or multiple driving motors. Driven by the power source, the driving rod 62322 moves, thereby driving the adjustment ring 62321 to slide along the axial direction of the air inlet 6220, and the power of the adjustment ring 62321 is transmitted to each adjustment unit 622, so that the adjustment unit 622 rotates relative to the fixed disk 621 along the radial direction of the air inlet 6220, thereby adjusting the size of the air outlet port of the air inlet 6220. Among them, the adjustment ring 62321 is a core component that evenly distributes power to each adjustment unit 622 to ensure that all adjustment units 622 act synchronously.

[0087] In this embodiment, compared with controlling each regulating unit 622 individually, the structure in which the regulating ring 62321 controls the actions of all regulating units greatly improves the consistency and accuracy of regulation, avoids the problem of unstable intake flow caused by asynchronous regulation, and enables the compressor 1 to more accurately adapt to intake requirements under different working conditions. In addition, the structural composition is relatively simple, and the connection method between the components is clear.

[0088] In other embodiments, Figure 9 As shown, the compression chamber 2102 of the volute 210 is arranged in a stepped structure in the area of the air inlet duct to provide an accommodation space for the adjustment ring 62321, and the fixed disk 621 is provided with a first sliding hole 6210, and the volute 210 is provided with a second sliding hole 2105 corresponding to the first sliding hole 6210, and the extension direction of the first sliding hole 6210 and the second sliding hole 2105 is parallel to the axial direction of the air inlet duct 6220, and the driving rod 62322 is slidably arranged in the first sliding hole 6210 and the second sliding hole 2105 in turn and is hinged to the adjustment ring 62321, and the adjustment ring 62321 is controlled to move up and down by controlling the driving rod 62322 to slide back and forth along the axial direction of the first sliding hole 6210 and the second sliding hole 2105, so as to adjust the size of the air outlet port of the air inlet duct 6220. In this embodiment, the sliding process of the driving rod 62322 relative to the volute does not interfere with the adjusting plate 6221 and the sealing plate 6222, and the inner wall of the air inlet formed by the volute slides with the outer peripheral surface of the adjusting ring 62321, so that the moving trajectory of the adjusting ring 62321 remains stable, making the adjustment process smoother.

[0089] According to an embodiment of the present invention, a compressor 1 is also provided. Figure 1 , Figure 6 and Figure 7 As shown, the compressor 1 includes a flow regulating device 62 , a volute 210 and an impeller 510 . The fixed disk 621 is installed on the volute 210 . The impeller 510 is installed in the inner cavity of the volute 210 . The impeller 510 is used to compress the air in the inner cavity of the volute 210 .

[0090] Among them, the inner cavity of the volute 210 includes a communicated installation cavity 2101 and a compression cavity 2102. The impeller 510 is installed in the compression cavity 2102, the fixed disk 621 is installed at the opening of the installation cavity 2101 and seals the installation cavity 2101, and the flow rate regulating device 62 is received in the installation cavity 2101. The axis of the air inlet passage 6220 is parallel to the axis of the impeller 510, or the axis of the air inlet passage 6220 coincides with the axis of the impeller 510, and along the axis of the air inlet passage 6220, the air outlet of the air inlet passage 6220 is arranged opposite to the impeller 510, ensuring that air can smoothly flow from the air inlet passage 6220 into the inner cavity of the volute 210 where the impeller 510 is located for compression treatment. For the compressor 1 proposed by the present invention, through the collaborative work of multiple regulating units 622, the throat size of the air inlet passage 6220 can be accurately adjusted according to actual needs, so as to precisely control the air flow rate entering the compressor 1. Since the air outlet of the air inlet passage 6220 is arranged opposite to the impeller 510, and the flow rate regulating device 62 can ensure that air smoothly flows from the air inlet passage 6220 into the inner cavity of the volute 210 where the impeller 510 is located, the air flow field entering the impeller 510 is more uniform and stable. The uniform and stable air flow helps the impeller 510 compress air more efficiently, reduces air flow disorder and energy loss, and thus improves the overall compression efficiency of the compressor 1 and reduces the energy consumption during the compression process.

[0091] By adjusting the throat size of the air inlet passage 6220, the compressor 1 can maintain good performance, meet the diverse requirements of different users for the flow rate and pressure of compressed air, and expand the application range of the compressor 1.

[0092] Furthermore, an installation groove 2103 is further provided on one end face of the volute 210 facing the fixed disk 621, and the installation groove 2103 is arranged around the opening of the installation cavity 2101. Specifically, a convex platform structure 6219 is provided on the end face of the fixed disk 621 facing the volute 210 and is matched with the installation groove 2103. A plurality of connection holes 2104 are further provided on the outer peripheral side of the volute 210 around the installation groove 2103, and the connection holes 2104 extend along the axis of the air inlet passage 6220. The fixed disk 621 is also provided with a plurality of through holes 6218, and the through holes 6218 correspond to the connection holes 2104 one by one. By passing bolts and other connecting pieces through the through holes 6218 and connecting them into the connection holes 2104, the fixed disk 621 is fixedly connected to the volute 210. When the fixed disk 621 is fixed to the volute 210, the convex platform structure 6219 is located in the installation groove 2103, and the adjusting connection body 62217 of the adjusting piece 6221 and the sealing connection body 622217 of the sealing piece 62221 are arranged in the installation groove 2103 and are clamped and fixed between the convex platform structure 6219 and the bottom surface of the installation groove 2103.

[0093] The compressor 1 proposed by the present invention is a centrifugal air compressor, which can be a single-stage centrifugal air compressor, a multi-stage centrifugal air compressor, or a magnetic levitation centrifugal air compressor. Among them, the compressor 1 further includes structures such as a vaneless diffuser and a gas collector. The compressor 1 can also be a centrifuge used in a refrigeration system, that is, a centrifugal compressor.

[0094] As described above, the above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A flow regulating device, characterized in that, The flow rate regulating device includes: A fixed disk, which is provided with an air inlet; A plurality of regulating units, which are sequentially arranged circumferentially around the air inlet and are respectively connected to the fixed disk. The plurality of regulating units jointly enclose a cylindrical structure, and the cylindrical structure has an air inlet passage communicating with the air inlet; A driving assembly, which is installed on the fixed disk. The driving assembly includes an adjusting ring that can move axially along the air inlet passage relative to the fixed disk. The adjusting ring is sleeved on the outer peripheral surface of the cylindrical structure. Along the axial direction of the air inlet passage, the inner ring surface of the adjusting ring is in sliding fit with the side surface of each regulating unit facing away from the air inlet passage; Wherein, the regulating unit is an elastic member, and the regulating unit is configured to be in an elastic deformation state. The resilience of the regulating unit drives the regulating unit to abut against the inner ring surface, and the inner diameter dimension of the adjusting ring is smaller than the inner diameter dimension of the air inlet.

2. The flow rate regulating device according to claim 1, characterized in that, Along the circumferential direction of the air inlet passage, partial regions of any two adjacent regulating units overlap.

3. The flow rate regulating device according to claim 1, characterized in that The regulating unit includes a regulating piece and a sealing member. Among all the regulating units, all the regulating pieces are sequentially arranged at intervals along the circumferential direction of the air inlet passage, and the regulating pieces and the sealing members are alternately arranged along the circumferential direction of the air inlet passage. Any sealing member is respectively connected to two adjacent regulating pieces to seal the gap between two adjacent regulating pieces.

4. The flow rate regulating device according to claim 3, characterized in that, The sealing member includes a sealing piece. Along the circumferential direction of the air inlet passage, among one sealing piece and two adjacent regulating pieces to this sealing piece, one side edge of the sealing piece overlaps with one regulating piece, and the other side edge of the sealing piece overlaps with the other regulating piece.

5. The flow rate regulating device according to claim 4, characterized in that, Along the axial direction of the air inlet passage, one end of the regulating piece facing away from the fixed disk is provided with a flanging structure, and the flanging structure has a first chute extending along the circumferential direction of the air inlet passage; Along the radial direction of the air inlet passage, the sealing piece is arranged on the side of the regulating piece facing away from the air inlet passage and is in fit with the regulating piece. Along the axial direction of the air inlet passage and along the circumferential direction of the air inlet passage, one end of the sealing piece facing away from the fixed disk is in sliding fit with the first chute.

6. The flow rate regulating device according to claim 5, wherein Along the circumferential direction of the air inlet passage, one sealing piece is in sliding fit with the first chutes on two adjacent regulating pieces to this sealing piece.

7. The flow rate regulating device according to claim 4, characterized in that Along the air flow direction of the air inlet passage, the width dimension of the regulating piece gradually decreases, and the width dimension of the sealing piece gradually increases, wherein the width dimension refers to the dimension of the regulating piece or the sealing piece along the circumferential direction of the air inlet passage.

8. The flow rate regulating device according to claim 4, wherein Both the regulating piece and the sealing piece are shape memory alloy members.

9. The flow rate regulating device according to any one of claims 4 to 8, wherein The regulating piece includes a regulating main body and a regulating connecting body that are connected and arranged at an angle, and the regulating connecting body is connected to the fixed disk; The sealing piece includes a sealing main body and a sealing connecting body that are connected and arranged at an angle, and the sealing connecting body is connected to the sealing main body; Wherein, all of the adjusting body and the sealing body jointly enclose and define the air inlet passage. Along the axial direction of the air inlet passage, the inner ring surface of the adjusting ring is in sliding fit with the adjusting body, and / or the inner ring surface of the adjusting ring is in sliding fit with the sealing body.

10. The flow rate regulating device according to any one of claims 1 to 8, characterized in that, Along the air flow direction in the air inlet passage, the inner diameter of the adjusting ring gradually decreases.

11. The flow rate regulating device according to any one of claims 1 to 8, characterized in that Along the air flow direction in the air inlet passage, the inner diameter of the adjusting ring remains unchanged, and the value range of the ratio R1 / R2 of the inner diameter R1 of the adjusting ring to the inner diameter R2 of the air inlet is 0.5 to 0.

9. Alternatively, along the air flow direction in the air inlet passage, the inner diameter of the adjusting ring gradually decreases, and the value range of the ratio R1 / R2 of the minimum inner diameter R1 of the adjusting ring to the inner diameter R2 of the air inlet is 0.5 to 0.

9.

12. The flow rate adjusting device according to any one of claims 1 to 8, characterized in that The driving assembly further includes a linkage unit installed on the fixed disk. The linkage unit includes at least one driving member that can move relative to the fixed disk along the axial direction of the air inlet passage, and the driving member is connected to the adjusting ring.

13. The flow rate regulating device according to claim 12, characterized in that, The linkage unit includes a plurality of driving members, and the driving members are configured as rod-shaped driving rods, and each driving rod is respectively hinged to the adjusting ring.

14. A compressor, characterized in that It includes the flow rate adjusting device according to any one of claims 1 to 13. The compressor further includes a volute and an impeller disposed in the volute. The fixed disk is fixedly installed on the volute, and along the axial direction of the air inlet passage, the air outlet of the air inlet passage is disposed opposite to the impeller.

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