Anti-surge structure and compressor

Abstract

The application provides an anti-surge structure and a compressor, and belongs to the technical field of compressors. The anti-surge structure comprises a body, the body is an air inlet branch plate or a stator blade, the body has a side wall and a top wall, the top wall is used for being connected with a casing, the body has an air guide channel inside, and the air guide channel is used for being communicated with an air source; a plurality of air guide holes are arranged on the side wall in a spaced manner along the height direction of the side wall, the air guide holes are communicated with the air guide channel, and the axis of the air guide hole is at a set angle with the side wall; the airflow after passing through the air guide channel and the air guide hole blows to the air inlet main flow path of the compressor, so as to adjust the air inlet attack angle of the rotor blade in the compressor. The anti-surge structure provided by the application plays a regulating role on the air inlet attack angle of the rotor blade, makes the air inlet more smooth, improves the working characteristics, expands the stable working range, and realizes the anti-surge of the compressor.

Description

An anti-surge structure and compressor Technical Field

[0001] This invention relates to the field of air compressor technology, specifically to an anti-surge structure and an air compressor. Background Technology

[0002] The compressor of an aero-engine is an important component of the core engine. Air enters the compressor impeller at a certain initial velocity through the compressor intake duct. It absorbs mechanical energy in the impeller passage, which greatly increases the pressure and velocity. After entering the diffuser, the pressure is further increased, achieving the purpose of pressurization.

[0003] Surge in the compressor during operation can cause a rapid deterioration in engine characteristics, or even engine shutdown or blade breakage, resulting in severe damage to the entire engine. Therefore, widening the stable operating range of the compressor, delaying the occurrence of unstable flow phenomena, and preventing compressor surge are among the key issues in compressor design.

[0004] Currently, the commonly used compressor surge prevention measures mainly include intermediate stage bleed method, self-circulation bleed method, and adjustable guide vane method. Conventional intermediate stage bleed method and self-circulation bleed method have a certain impact on the efficiency and loss of the compressor. The adjustable guide vane method changes the outlet angle by rotating the first few stages of blades, thereby widening the stable operating range of the compressor and preventing compressor surge. However, the traditional adjustable guide vane surge prevention measure requires the design of adjustable guide vanes, rocker arms, linkage rings, control levers, etc., resulting in a large number of parts and a complex structure. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the traditional anti-surge measures such as adjustable guide vanes in the prior art, which require the design of adjustable guide vanes, rocker arms, linkage rings, control levers, etc., resulting in a large number of parts and a complex structure. The present invention provides an anti-surge structure and compressor.

[0006] To solve the above-mentioned technical problems, the present invention provides an anti-surge structure, comprising:

[0007] The body is an intake support plate or a stator blade, and the body has a side wall and a top wall, the top wall being used to connect with the casing.

[0008] The body has an internal air intake channel for communicating with an air source; the side wall has a plurality of air intake holes spaced apart along its height direction, the air intake holes are communicating with the air intake channel, and the axis of the air intake holes is at a set angle to the side wall.

[0009] After passing through the air intake channel and the air intake hole, the airflow is blown towards the main intake path of the compressor to adjust the intake angle of the rotor blades in the compressor.

[0010] Optionally, the body has a plurality of components evenly distributed along the circumferential direction of the compressor.

[0011] Optionally, the air intake holes are arranged in multiple rows, with the multiple rows of air intake holes arranged alternately.

[0012] Optionally, the equivalent diameter of the air vent gradually decreases along the direction away from the top wall.

[0013] Optionally, the air intake channel is connected to the top wall.

[0014] Optionally, by controlling the flow rate of the airflow entering the air intake channel, different intake angles of attack of the rotor blades can be achieved.

[0015] The present invention also provides a compressor, comprising:

[0016] Casing;

[0017] The hub is located at the central shaft position inside the casing;

[0018] The stator blade and the air intake support plate are connected to the inner side wall of the casing. The air intake support plate or the stator blade is an anti-surge structure as described above. The anti-surge structure includes a body, and the body has an air intake channel inside.

[0019] Rotor blades are disposed on the outer wall of the hub.

[0020] Optionally, a vent is provided on the inner wall of the casing near the high-pressure stage outlet of the compressor, and the vent is connected to the bleed air channel through a guide air channel.

[0021] Optionally, a control element is provided on the air guide channel, which is used to control the opening and closing of the air guide channel and the flow rate of the airflow through the air guide channel.

[0022] Optionally, the housing includes:

[0023] shell;

[0024] An inner shell is disposed inside the outer shell, and the air guiding channel is formed between the inner shell and the outer shell. A partition plate is disposed in the air guiding channel, and the partition plate divides the air guiding channel into an air collecting chamber and an air drawing chamber. The air collecting chamber is connected to the air vent, and the air drawing chamber is connected to the air drawing channel. The control component is disposed on the partition plate.

[0025] The technical solution of this invention has the following advantages:

[0026] 1. The anti-surge structure provided by the present invention includes a body, which is an intake support plate or a stator blade. The body has an air intake channel inside, which is used to communicate with an air source. The side wall has a plurality of air intake holes spaced apart along its height direction. The axis of the air intake holes forms a set angle with the side wall. By setting the set angle, the airflow after passing through the air intake channel and the air intake holes is blown towards the main intake path of the compressor, so as to adjust the intake angle of attack of the rotor blades in the compressor.

[0027] By adjusting the inlet angle of attack of the rotor blades, the compressor intake is made smoother, improving operating characteristics, expanding the stable operating range, and preventing compressor surge. The structure is simple, requiring no complex design. It achieves the effect of traditional adjustable guide vanes by changing the angle of attack of the main intake path of the rotor blades through airflow. Furthermore, compared to traditional adjustable guide vane surge prevention methods, the rotor blade inlet angle of attack along the blade span can be precisely controlled by rationally arranging the air vents on the stator blades or support plate surfaces.

[0028] 2. The anti-surge structure provided by the present invention, through multiple bodies evenly distributed along the circumferential direction of the compressor, can simultaneously change the angle of all airflow between any two adjacent stator blades or two adjacent intake support plates entering the compressor. The synchronous adjustment of the airflow and the synchronous expansion of the working position ensure the anti-surge effect and the stability of the compressor.

[0029] 3. The anti-surge structure provided by the present invention has multiple rows of air intake holes, which are arranged in an alternating pattern. This arrangement reduces the requirements for space size and allows for more choices in the arrangement of air intake holes without being limited by height.

[0030] 4. The anti-surge structure provided by the present invention has an equivalent diameter of the air intake hole that gradually decreases in the direction away from the top wall. Since stall is more likely to occur at the blade tip, a larger air intake hole is set at that location to facilitate the adjustment of the rotor blade intake angle of attack and expand the working range of the compressor.

[0031] 5. The anti-surge structure provided by the present invention has an air intake channel connected to the top wall, and by sending air from the top wall into the air intake channel, it avoids sending air from the side wall from affecting the normal main airflow of the compressor.

[0032] 6. The anti-surge structure provided by the present invention controls the flow rate of the airflow entering the intake channel to achieve different intake angles of attack of the rotor blades. Different flow rates can be adjusted according to the actual operating conditions of the compressor to achieve different intake angles of attack of the rotor blades.

[0033] 7. The compressor provided by the present invention includes a casing, a hub, stator blades, an inlet support plate, and rotor blades. The inlet support plate or stator blades are anti-surge structures. The anti-surge structure adjusts the inlet angle of attack of the rotor blades, making the inlet flow smoother, improving the working characteristics, expanding the stable working range, and achieving anti-surge of the compressor. Moreover, the structure is simple and does not require complex structures. By changing the angle of the main inlet flow path through airflow, it achieves the effect of traditional adjustable guide vanes.

[0034] 8. The compressor provided by the present invention has an exhaust port on the inner wall of the casing near the high-pressure stage outlet of the compressor. The exhaust port is connected to the induced draft channel through the induced draft channel. The gas in the induced draft channel is introduced from the high-pressure stage outlet of the compressor, which utilizes the gas inside the compressor itself. This increases the airflow through the rotor blades of this stage and decreases the airflow through the blades of the subsequent compressor stages, further improving the working characteristics and expanding the stable working range.

[0035] Furthermore, by drawing out the gas from the high-pressure stage, the problem of reduced air utilization caused by releasing the gas into the atmosphere, which is a common method for preventing gas surge in intermediate stages, is avoided.

[0036] 9. The compressor provided by the present invention has a control component on the air guide channel. The control component is used to control the opening and closing of the air guide channel and the flow rate of the airflow through the air guide channel. When the compressor is in a low speed state, in order to solve the surge problem, the control component controls the air guide channel to be in an open state, so as to introduce high-pressure gas into the air intake port to adjust the intake angle of attack. When the compressor starts successfully and enters the high speed state (design operating condition), the control component controls the air guide channel to be closed, and the airflow only flows in the main path, so it will not affect the efficiency of the compressor.

[0037] 10. The compressor provided by the present invention includes a casing comprising an outer shell and an inner shell, with an air guide channel formed between the inner shell and the outer shell. A partition plate divides the air guide channel into an air collecting chamber and an air venting chamber. The air collecting chamber is connected to the air vent, and the air venting chamber is connected to the air venting channel. The control components are mounted on the partition plate. It is not necessary to install additional pipes outside the casing to form an air guide channel, and the arrangement of the chambers makes the introduction of gas smoother. Attached Figure Description

[0038] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 is a schematic diagram of a specific embodiment of the anti-asthma structure provided in the embodiments of the present invention;

[0040] Figure 2 is a schematic diagram of the airflow direction change in the working state of the anti-surge structure in Figure 1;

[0041] Figure 3 is a structural schematic diagram of a specific embodiment of the compressor provided in the present invention.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Body; 2. Side wall; 3. Top wall; 4. Casing; 5. Air intake channel; 6. Air intake hole; 7. Rotor blade; 8. Air intake chamber; 9. Hub; 10. Air collection chamber; 11. Air outlet; 12. Air guide channel; 13. Control components; 14. Outer shell; 15. Inner shell; 16. Divider plate. Detailed Implementation

[0044] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0048] Currently, the most commonly used compressor anti-surge measures at home and abroad mainly include intermediate stage bleed, self-circulating bleed, and adjustable guide vanes.

[0049] Intermediate-stage bleed method: Generally, one or more rings of holes are made on the flow channel surface of the casing inside a multi-stage compressor. A bleed mechanism is used to control the bleed switch, allowing some air to flow into the atmosphere. This increases the airflow in the first few stages of the compressor and decreases the airflow in the later stages, thus widening the stable operating range of the compressor and preventing compressor surge. However, this method of preventing surge by bleeding out the air that has already been compressed in the earlier stages of the compressor. This portion of gas is not utilized, which reduces energy utilization and compressor efficiency.

[0050] Self-circulating bleed air method: Generally, vent holes are designed on the inner casing flow channel surface at the end of the axial stage of a multi-stage compressor, and the airflow released at the end of the axial stage is reintroduced into the compressor inlet by designing bleed air channels to form self-circulation, which widens the stable operating range of the compressor and prevents compressor surge. Although it can solve the aerodynamic problems of the compressor at low speeds, it increases the compressor losses at high speeds (design conditions).

[0051] Adjustable guide vane method: By rotating the first few stages of blades, the outlet angle is changed. By controlling the size and direction of the outlet angle of the blades, the angle of attack of the airflow flowing into the moving blades can be kept in the normal position, thus widening the stable operating range of the compressor and preventing compressor surge. This anti-surge measure of adjustable guide vanes requires the design of adjustable guide vanes, rocker arms, linkage rings, control levers, etc., resulting in a large number of parts and a complex structure.

[0052] The anti-surge structure provided in this embodiment is suitable for use in compressors, where the angle of attack of the rotor blades is adjusted by the ejection of airflow.

[0053] As shown in Figures 1 to 3, this embodiment provides a specific implementation of the anti-surge structure, including a body 1, which is an intake support plate or stator blade. The body 1 has a side wall 2 and a top wall 3, and the top wall 3 is used to connect with the casing 4. The body 1 has an air intake channel 5 inside, which is used to communicate with an air source. The side wall 2 has a plurality of air intake holes 6 spaced apart along its height direction. The air intake holes 6 communicate with the air intake channel 5, and the axis of the air intake holes 6 forms a set angle with the side wall 2. The airflow after passing through the air intake channel 5 and the air intake holes 6 is blown towards the main intake path of the compressor to adjust the intake angle of attack of the rotor blades 7 in the compressor.

[0054] Figure 2 shows the change in the direction of the main flow path under the influence of the airflow path. Figure a shows the state of the main flow path without the airflow path, and figure b shows the direction of the airflow path when the airflow path is added. The change of the main flow path under the influence of the airflow path is shown in Figure c. Figure d shows a schematic diagram of the direction of the airflow path, the initial main flow path, and the changed main flow path.

[0055] By adjusting the inlet angle of attack of the rotor blades 7, the compressor intake becomes smoother, improving operating characteristics, expanding the stable operating range, and preventing compressor surge. The structure is simple, requiring no complex design. By changing the angle of the main inlet path of the rotor blades through airflow, it achieves the effect of traditional adjustable guide vanes. Furthermore, compared to traditional adjustable guide vane surge prevention methods, by rationally arranging the stator blades or the air vents 6 on the surface of the inlet support plate, precise control of the rotor blade inlet angle of attack along the blade span direction can be achieved.

[0056] Specifically, the body 1 has two sidewalls 2 arranged opposite to each other. Taking the body 1 as a stator blade as an example, one sidewall 2 is a pressure surface and the other sidewall 2 is a suction surface. The air vent 6 can be set on either the pressure surface or the suction surface, without limitation. The outlet position of the air vent 6 must meet the structural, strength and space requirements. The air source can be an external air source or the gas at the high-pressure stage outlet of the compressor. The axis of the air vent 6 forms a set angle with the sidewall 2, and the set angle matches the aerodynamic design of the compressor. The description of the height direction is interpreted as follows: if it is an inlet support plate, then it is its height direction; if it is a stator blade, then its height direction is its blade span direction.

[0057] The cross-section of the air intake channel 5 can be rectangular or waist-shaped with rounded ends. The rounded ends make the airflow more stable. The air intake channel 5 covers all the air intake holes 6.

[0058] The air vent 6 may be circular or elliptical.

[0059] In one specific embodiment, the stator blades are selected as either stage 0 or stage 1 stator blades, which has a better effect on improving the compressor's operating characteristics. Alternatively, as an alternative embodiment, stator blades can also be selected from non-inlet stator blades, which also have the function of adjusting the angle of attack of the subsequent rotor blades. This embodiment provides an anti-surge structure. The main body 1 has multiple stator blades evenly distributed along the circumferential direction of the compressor, which allows all airflow between any two adjacent stator blades or two adjacent inlet support plates entering the compressor to simultaneously change angle. This synchronous adjustment of the airflow and synchronous expansion of the working direction ensures the anti-surge effect and the stability of the compressor. The arrangement and size of the air vents 6 on each main body 1 are all equal.

[0060] As shown in Figure 1, this embodiment provides an anti-surge structure. The air intake holes 6 have multiple rows, which are staggered and spaced apart. This arrangement reduces the space requirements and allows for more selective arrangement of the air intake holes 6, without being limited by height. By rationally arranging the air intake holes 6 on the sidewall 2, the angle of attack of the rotor blades along the blade span direction can be precisely controlled. Regarding this precise control: because the wind speed varies at different positions of the stator blades, the noise, surge, and stability conditions differ. By adjusting the position and size of each air intake hole 6, different air intake volumes at different positions can be achieved. The required airflow intensity and size can be adjusted to achieve more precise control. In one specific embodiment, the air intake holes 6 have two rows. Alternatively, as an alternative embodiment, the air intake holes 6 can have one row or other numbers of rows.

[0061] As shown in Figure 1, this embodiment provides an anti-surge structure. Along the direction away from the top wall 3, the equivalent diameter of the air intake hole 6 gradually decreases. Since stall is more likely to occur at the blade tip, a larger air intake hole 6 is provided at this location to allow for better adjustment of the intake angle of the rotor blade 7 and expand the working range of the compressor.

[0062] As shown in Figure 1, this embodiment provides an anti-surge structure. The air intake channel 5 is connected to the top wall 3. By sending air from the top wall 3 into the air intake channel 5, the normal main airflow of the compressor is avoided from being affected by the air intake from the side wall 2.

[0063] This embodiment provides an anti-surge structure. By controlling the flow rate of the airflow entering the bleed air channel 5, different inlet angles of attack of the rotor blades 7 can be achieved. Different flow rates can be adjusted according to the actual operating conditions of the compressor to achieve different inlet angles of attack of the rotor blades 7. Specifically, a flow rate regulator can be installed on the channel connecting the bleed air channel 5 to the air source to achieve this adjustment.

[0064] As shown in Figures 2 and 3, this embodiment also provides a compressor, including a casing 4, a hub 9, stator blades and an inlet support plate, and rotor blades 7. The hub 9 is located at the central axis position inside the casing 4. The stator blades and the inlet support plate are connected to the inner side wall of the casing 4. The inlet support plate or the stator blades are anti-surge structures as described in any of the above embodiments. The anti-surge structure includes a body 1, and the body 1 has an air intake channel 5 inside. The rotor blades 7 are located on the outer side wall of the hub 9.

[0065] The anti-surge structure adjusts the intake angle of the rotor blades 7, making the intake smoother, improving operating characteristics, expanding the stable operating range, and achieving compressor surge prevention. Its simple structure eliminates the need for complex configurations, achieving the effect of traditional adjustable guide vanes by changing the angle of the main intake path through airflow. Furthermore, compared to traditional adjustable guide vane anti-surge methods, the stator blades or intake support plate surface vents 6 allow for precise control of the rotor blades' intake angle along the blade span direction, a feature not found in traditional guide vane adjustment mechanisms.

[0066] As shown in Figure 3, the compressor provided in this embodiment has a vent 11 on the inner wall of the casing 4 near the high-pressure stage outlet. The vent 11 is connected to the induced draft channel 5 via an induced draft channel 12. The gas in the induced draft channel 5 is introduced from the high-pressure stage outlet of the compressor, utilizing the gas inside the compressor itself. This increases the airflow through the rotor blades 7 of this stage and decreases the airflow through the blades of subsequent compressor stages, further improving the operating characteristics and expanding the stable operating range. Furthermore, by venting the gas from the high-pressure stage, the problem of reduced air utilization caused by releasing gas into the atmosphere in intermediate stage venting and anti-surge methods is avoided.

[0067] As shown in Figure 3, the compressor provided in this embodiment has a control component 13 on the air guide channel 12. The control component 13 is used to control the opening and closing of the air guide channel 12 and the flow rate of the airflow through the air guide channel 12. When the compressor is in a low-speed pneumatic state, in order to solve the surge problem, the control component 13 controls the air guide channel 12 to be in an open state, introducing high-pressure gas into the intake port 6 to adjust the intake angle of attack. When the compressor starts successfully and enters the high-speed state (design operating condition), the control component 13 controls the air guide channel 12 to be closed, and the airflow only flows in the main flow path, so it will not affect the efficiency of the compressor.

[0068] Specifically, the control element 13 can be an electrically controlled venting valve or a pneumatically controlled venting valve.

[0069] As shown in Figure 3, the compressor provided in this embodiment includes a casing 4 comprising an outer shell 14 and an inner shell 15. The inner shell 15 is disposed inside the outer shell 14, and an air guide channel 12 is formed between the inner shell 15 and the outer shell 14. A partition plate 16 is disposed within the air guide channel 12, dividing the air guide channel 12 into an air collecting chamber 10 and an air ducting chamber 8. The air collecting chamber 10 is connected to the air vent 11, and the air ducting chamber 8 is connected to the air ducting channel 5. A control component 13 is disposed on the partition plate 16. The control component 13 being disposed on the partition plate 16 eliminates the need for additional piping outside the casing 4 to form the air guide channel 12, and the cavity design facilitates smoother gas introduction.

[0070] Specifically, the top wall 3 is connected to the air guide channel 12, the gas collecting chamber 10 and the air duct 8 are annular cavity structures, the partition plate 16 is annular plate, the partition plate 16 is provided with mounting holes, the control component 13 is installed in the mounting holes, and the multiple top walls 3 evenly distributed in the circumferential direction are all connected to the gas collecting chamber 10. The communication with the gas collecting chamber 10 is achieved through the through hole provided in the inner shell 15 of the casing 4. After the gas enters the gas collecting chamber 10 from the air duct 8, it then enters the multiple air ducts 5 simultaneously.

[0071] Specific working process: The airflow direction during operation is shown in Figure 3. When the compressor starts (i.e., at low speed), the compressor may experience surge. At this time, the control component 13 is activated. The airflow flowing from the vent 11 into the gas collecting chamber 10 flows into the bleed chamber 8 after passing through the control component 13. Then, it returns to the compressor working flow channel through the bleed channel 5 and bleed hole 6 inside the stator blades or support plates. At this time, the airflow flowing out from the bleed channel 5 inside the stator blades or support plates blows towards the main flow path at a certain angle along the circumference, which plays a role in adjusting the intake angle of attack of the rotor blades 7, improving the working characteristics, and expanding the range of motion. The system maintains a stable operating range. Furthermore, the airflow within the gas collecting chamber 10 returns to the rotor blade 7 inlet via the bleed-in channels 5 and bleed-in holes 6 inside the stator blades or support plates. This increases the airflow through the rotor blades of this stage and decreases the airflow through the subsequent compressor blades, further improving operating characteristics and expanding the stable operating range. When the compressor starts successfully and enters a high-speed state (design condition), the control unit 13 is closed, and the airflow only flows in the main flow path, thus not affecting the compressor efficiency. This design is simple in structure and possesses both self-circulating bleed-in air and adjustable guide vanes to adjust the inlet angle. This embodiment has been applied to compressor test pieces and can effectively solve the start-up problem of compressors in low-temperature conditions.

[0072] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An anti-asthmatic structure, characterized in that, include: The body (1) is an intake support plate or stator blade. The body (1) has a side wall (2) and a top wall (3). The top wall (3) is used to connect with the casing (4). The body (1) has an air intake channel (5) inside. The air intake channel (5) is used to communicate with the air source. The side wall (2) has a plurality of air intake holes (6) spaced apart along its height direction. The air intake holes (6) are connected to the air intake channel (5). The axis of the air intake holes (6) is at a set angle with the side wall (2). The air intake holes (6) have multiple rows. The multiple rows of air intake holes (6) are staggered and spaced apart. Along the direction away from the top wall (3), the equivalent diameter of the air intake holes (6) gradually decreases. The airflow after passing through the air intake channel (5) and the air intake holes (6) is blown towards the main intake path of the compressor to adjust the intake angle of the rotor blades (7) in the compressor.

2. The anti-surge structure according to claim 1, characterized in that, The main body (1) has a plurality of components evenly distributed along the circumferential direction of the compressor.

3. The anti-surge structure according to claim 1, characterized in that, The air intake channel (5) is connected to the top wall (3).

4. The anti-surge structure according to any one of claims 1-3, characterized in that, By controlling the flow rate of the airflow entering the air intake channel (5), different intake angles of attack of the rotor blades (7) can be achieved.

5. A compressor, characterized in that, include: Casing (4); Hub (9) is located at the central shaft position inside the casing (4); stator blades and air intake support plate are connected to the inner side wall of the casing (4), the air intake support plate or the stator blade is an anti-surge structure according to any one of claims 1-4, the anti-surge structure includes a body (1), the body (1) has an air intake channel (5) inside; rotor blades (7) are located on the outer side wall of the hub (9).

6. The compressor according to claim 5, characterized in that, An air vent (11) is provided on the inner wall of the casing (4) near the high-pressure stage outlet of the compressor. The air vent (11) is connected to the induced air channel (5) through the air guide channel (12).

7. The compressor according to claim 6, characterized in that, A control element (13) is provided on the air guide channel (12), and the control element (13) is used to control the opening and closing of the air guide channel (12) and the flow rate of the airflow through the air guide channel (12).

8. The compressor according to claim 7, characterized in that, The casing (4) includes: an outer shell (14); an inner shell (15) disposed inside the outer shell (14), the inner shell (15) and the outer shell (14) forming the air guide channel (12), a partition plate (16) is disposed in the air guide channel (12), the partition plate (16) divides the air guide channel (12) into an air collecting chamber (10) and an air venting chamber (8), the air collecting chamber (10) is connected to the air vent (11), the air venting chamber (8) is connected to the air venting channel (5), and the control element (13) is disposed on the partition plate (16).

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