Centrifugal compressor performance testing device and testing method

Abstract

The centrifugal compressor performance testing device comprises an air inlet pipeline, a measuring mechanism and a to-be-tested compressor structure, the air inlet pipeline is connected with the to-be-tested compressor structure, the measuring mechanism is arranged on the air inlet pipeline, the to-be-tested compressor structure comprises an impeller and a guide vane, the impeller is connected with one end of the air inlet pipeline, and the other end of the air inlet pipeline is connected with the guide vane. The guide vane is arranged in the air inlet pipeline, the measuring mechanism comprises a probe and a circumferential adjusting mechanism, a ball head of the probe is located in a flow field of the air inlet pipeline, located between the impeller and the guide vane and used for measuring the measuring section of the flow field, and the circumferential adjusting mechanism drives the guide vane to move in the circumferential direction. The guide vane is driven by the circumferential adjusting mechanism to move circumferentially, the position of the guide vane relative to the probe can be adjusted, the circumferential adjusting mechanism and the axial space of the guide vane are highly overlapped, the distance between the impeller and the guide vane is reduced, the distance between the impeller and the probe is reduced, the measurement error is reduced, and the measurement precision is improved. And the real flow field condition of the impeller inlet can be obtained more accurately.

Description

Technical Field

[0001] The present invention relates to the technical field of flow field testing, and specifically relates to a centrifugal compressor performance testing device and a testing method. Background Art

[0002] Centrifugal compressors usually use guide vanes to adjust the flow rate. The guide vanes are located upstream of the impeller and are used to change the angle of the airflow entering the impeller. When studying the adjustment law of the guide vanes, it is necessary to measure the flow field at the inlet of the impeller behind the guide vanes. Usually, a probe is used to measure the flow field at the inlet of the impeller. Measuring the flow field at the inlet of the impeller requires the spherical head of the probe to sweep across the entire flow field, but to sweep across the entire flow field, circumferential rotation around the axis of the impeller needs to be achieved. To achieve this function, a corresponding circumferential adjustment mechanism needs to be set to drive the coordinate frame to rotate so that the probe can rotate circumferentially around the axis of the impeller. Due to the limitations of the structure of the circumferential adjustment mechanism, the distance between the probe and the impeller is too large, and the measurement section is far from the inlet of the impeller. The farther the measurement point is, the more necessary it is to deduce the flow field parameters through the flow law, and the error increases significantly, making it difficult to measure the true flow field situation at the inlet of the impeller, and further resulting in too large a distance between the impeller and the guide vanes, weakening the adjustment effect of the guide vanes.

[0003] In the study of the adjustment law of the guide vanes, the flow field at the inlet of the impeller is a very important research parameter and needs to be measured at a position very close to the impeller. However, such circumferential adjustment mechanisms usually require a large amount of space, resulting in an increase in the distance between the probe and the impeller, making the measurement section far from the impeller, seriously affecting the study of the adjustment law of the guide vanes, unable to obtain the true flow field situation at the inlet of the impeller, and further unable to accurately study the adjustment law of the guide vanes, affecting the flow rate adjustment and performance matching of the centrifugal compressor. Summary of the Invention

[0004] In order to overcome at least one of the above-mentioned disadvantages, the present invention provides a centrifugal compressor performance testing device and a testing method. The object of the present invention can be achieved by adopting the following technical solutions:

[0005] In a first aspect of the present application, a centrifugal compressor performance testing device is provided, including an intake pipeline, a measuring mechanism, and a compressor structure to be tested. The intake pipeline is connected to the compressor structure to be tested, and the measuring mechanism is arranged on the intake pipeline;

[0006] The compressor structure to be tested includes an impeller and guide vanes. The impeller is connected to one end of the intake pipeline, and the guide vanes are arranged in the intake pipeline;

[0007] The measuring mechanism includes a probe and a circumferential adjustment mechanism. The spherical head of the probe is located in the flow field of the intake pipeline and is located between the impeller and the guide vanes for measuring the measurement section of the flow field. The circumferential adjustment mechanism drives the guide vanes to move to adjust the position of the guide vanes relative to the probe.

[0008] In an implementable manner, the circumferential adjustment mechanism includes a fixed part and a rotating part. The fixed part is arranged on the stator part of the intake pipeline. The rotating part is movably connected to the fixed part. The rotating part can rotate circumferentially with the axis of the impeller as the rotation center. The rotating part is connected to the guide vane to drive the guide vane to move circumferentially.

[0009] In an implementable manner, the centrifugal compressor performance testing device includes:

[0010] An installation part, the installation part and the intake pipeline enclose to form the flow field. The installation part is connected to the rotating part and the installation part is connected to the guide vane. The circumferential adjustment mechanism drives the guide vane to rotate through the installation part.

[0011] In an implementable manner, the rotating part is located on the outer peripheral side of the installation part.

[0012] In an implementable manner, the circumferential adjustment mechanism further includes a bearing assembly. The fixed part is rotationally connected to the rotating part through the bearing assembly.

[0013] In an implementable manner, the fixed part includes a first fixing piece and a second fixing piece. The bearing assembly includes a first bearing and a second bearing arranged coaxially with the impeller. The first fixing piece is rotationally connected to the first end of the rotating part through the first bearing. The second fixing piece is rotationally connected to the second end of the rotating part through the second bearing.

[0014] In an implementable manner, the circumferential adjustment mechanism further includes a motor and a transmission mechanism. The motor is connected to the fixed part. The first end of the transmission mechanism is power-connected to the output end of the motor. The second end of the transmission mechanism is power-connected to the rotating part. The motor drives the rotating part to rotate through the transmission mechanism.

[0015] In an implementable manner, the transmission mechanism includes a first gear and a second gear in meshing connection. The first gear is connected to the output shaft of the motor. The second gear is connected to the rotating part.

[0016] In an implementable manner, sealing members are provided between the rotating part and the fixed part, and between the fixed part and the stator part.

[0017] In an implementable manner, the centrifugal compressor performance testing device includes:

[0018] A coordinate frame, the coordinate frame is arranged on the stator part close to the impeller. The probe is inserted into the through holes of the coordinate frame and the stator part.

[0019] In one implementable manner, a position adjustment mechanism is provided on the coordinate frame, and the position adjustment mechanism is connected to the probe for driving the probe to move radially along the impeller.

[0020] In a second aspect of the present application, a testing method is provided, which is applied to any centrifugal compressor performance testing device in the first aspect. The steps of the testing method include:

[0021] The position of the probe is adjusted by moving the probe radially along the impeller;

[0022] The circumferential adjustment mechanism drives the guide vane to move circumferentially along the impeller to adjust the position of the guide vane.

[0023] Advantageous technical effects of the present invention: According to the present disclosure, the centrifugal compressor performance testing device drives the guide vane to move circumferentially along the impeller through the circumferential adjustment mechanism, and can adjust the position of the guide vane relative to the probe. The guide vane realizes the rotation function around the impeller axis through the circumferential adjustment mechanism. The axial space occupied by the circumferential adjustment mechanism and the guide vane overlaps, reducing the distance between the impeller and the guide vane, improving the adjustment effect of the guide vane, making the structure more compact, reducing the cost, and being applicable to the testing of high-compact centrifugal compressors; the probe can be arranged on the stator part close to the impeller, reducing the distance between the impeller and the probe, reducing the measurement error, improving the measurement accuracy, being able to more accurately obtain the true flow field situation at the impeller inlet, and further being able to more accurately study the adjustment law of the guide vane, improving the flow regulation and performance matching of the centrifugal compressor. Description of the Drawings

[0024] In the drawings, the following content is given by way of example and not by way of limitation:

[0025] Figure 1 A partial structural cross-sectional view of the testing device of the present invention is shown;

[0026] Figure 2 A structural cross-sectional view of the circumferential adjustment mechanism of the present invention is shown;

[0027] Figure 3 A structural cross-sectional view of a traditional testing device is shown.

[0028] In the figure:

[0029] 1. Impeller; 2. Probe; 3. Coordinate frame; 4. Guide vane; 5. Installation part; 6. Circumferential adjustment mechanism; 7. Stator part;

[0030] 61. Fixed part; 62. Rotating part; 63. Bearing; 64. Motor; 65. First gear; 66. Second gear. Detailed Embodiments

[0031] In the following detailed disclosure, reference is made to the accompanying drawings, and these embodiments are fully described to enable those skilled in the art to more clearly and specifically understand the technical solutions of the present invention. The described embodiments are not limited thereto. The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings.

[0032] In the present invention, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "connected", "fixed" should all be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. 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.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation of the present invention.

[0034] As Figure 3 shown, the fixed part of the traditional circumferential adjustment mechanism 6 is usually installed on the stator member 7 close to the impeller 1. The rotating part of the circumferential adjustment mechanism 6 drives the coordinate frame 3 to rotate. The probe 2 realizes the rotation function around the axis of the impeller 1 through the circumferential adjustment mechanism 6. Due to the limitation of the width of the rotating part itself, the distance between the probe 2 and the impeller 1 is too large. The circumferential adjustment mechanism 6 and the guide vane 4 need to be installed independently, and both need to occupy the axial space. The distance between the guide vane 4 and the impeller 1 is too large, affecting the flow rate adjustment and performance matching of the compressor.

[0035] In the first aspect of the present application, as Figure 1 and Figure 2 shown, a centrifugal compressor performance test device is provided, including an air inlet pipeline, a measuring mechanism and a compressor structure to be tested. The air inlet pipeline is connected to the compressor structure to be tested, and the measuring mechanism is arranged on the air inlet pipeline; the compressor structure to be tested includes an impeller 1 and a guide vane 4. The impeller 1 is connected to one end of the air inlet pipeline, and the guide vane 4 is arranged in the air inlet pipeline; the measuring mechanism includes a probe 2 and a circumferential adjustment mechanism 6. The spherical head of the probe 2 is located in the flow field of the air inlet pipeline and is located between the impeller 1 and the guide vane 4 for measuring the measurement section of the flow field. The circumferential adjustment mechanism 6 drives the guide vane 4 to move to adjust the position of the guide vane 4 relative to the probe 2.

[0036] The centrifugal compressor performance testing device provided by this embodiment is connected to the guide vane 4 through a circumferential adjustment mechanism to drive the guide vane 4 to move circumferentially along the impeller 1, which can adjust the position of the guide vane 4 relative to the probe 2. The guide vane 4 realizes the rotation function around the axis of the impeller 1 through the circumferential adjustment mechanism. The axial space occupied by the circumferential adjustment mechanism and the guide vane 4 overlaps, reducing the distance between the impeller 1 and the guide vane 4, improving the adjustment effect of the guide vane 4, making the structure more compact, reducing costs, and being applicable to the testing of high-compact centrifugal compressors.

[0037] The centrifugal compressor performance testing device provided by this embodiment arranges the probe 2 on the stator part 7 close to the impeller 1, reducing the distance between the impeller 1 and the probe 2, reducing the measurement error, improving the measurement accuracy, being able to more accurately obtain the real flow field condition at the inlet of the impeller 1, and thus more accurately studying the adjustment law of the guide vane 4, improving the flow regulation and performance matching of the centrifugal compressor.

[0038] In an implementable manner, as Figure 1 and Figure 2 shown, the circumferential adjustment mechanism 6 includes a fixed part 61 and a rotating part 62. The fixed part 61 is arranged on the stator part 7 of the intake pipeline. The rotating part 62 is movably connected to the fixed part 61. The rotating part 62 can rotate circumferentially with the axis of the impeller 1 as the rotation center. The rotating part 62 is connected to the guide vane 4 to drive the guide vane 4 to move circumferentially.

[0039] Among them, the coordinate frame 3 is installed on the stator part 7 close to the impeller 1. The fixed part 61 is respectively installed on the stator parts 7 at both ends. The rotating part 62 is rotationally connected to the fixed part 61, and the rotating part 62 is power-connected to the guide vane 4. Driving the guide vane 4 to move circumferentially through the circumferential adjustment mechanism 6 replaces the traditional way of driving the coordinate frame 3 and the probe 2 to move circumferentially, which can reduce the space occupation problem caused by the width limitation of the rotating part 62 itself in the traditional device. This layout not only allows the probe 2 to be closer to the impeller 1, reducing the measurement error, but also reduces the distance between the guide vane 4 and the impeller 1, thereby optimizing the flow regulation and performance matching of the compressor.

[0040] In an implementable manner, as Figure 1 and Figure 2 shown, the centrifugal compressor performance testing device includes an installation part 5. The installation part 5 and the intake pipeline enclose a flow field. The installation part 5 is connected to the rotating part 62 and the installation part 5 is connected to the guide vane 4. The circumferential adjustment mechanism 6 drives the guide vane 4 to rotate through the installation part 5.

[0041] Among them, the installation part 5 is annular and enclosed by the pipe wall of the intake pipe to form a flow field. The circumferential adjustment mechanism 6 drives the installation part 5 to rotate through the rotating part 62, driving the guide vane 4 in the flow field to rotate circumferentially, thereby changing the relative position of the guide vane 4 and the probe 2 in the circumferential direction, enabling the probe 2 to measure the flow field conditions at different circumferential positions. The position and angle of the guide vane 4 can be adjusted according to the test requirements to achieve a comprehensive test of the compressor flow field.

[0042] Among them, as Figure 2 shown, the rotating part 62 is located on the outer peripheral side of the installation part 5, avoiding the problem of space occupation caused by the limited width of the rotating part 62 itself in the traditional device. It also enables the axial space of the circumferential adjustment mechanism 6 and the installation part 5 to be highly overlapped, reducing the distance between the impeller 1 and the guide vane 4, improving the adjustment effect of the guide vane 4, optimizing the layout, reducing space occupation, making the structure more compact, improving the reliability and stability of the test device, and also reducing the manufacturing cost and maintenance cost, meeting the test requirements of the highly compact centrifugal compressor.

[0043] In an implementable embodiment, the circumferential adjustment mechanism 6 further includes a bearing 63 assembly, and the fixing part 61 is rotatably connected to the rotating part 62 through the bearing 63 assembly.

[0044] Among them, the circumferential adjustment mechanism 6 is used to drive the guide vane 4 to rotate circumferentially. The circumferential adjustment mechanism 6 generally includes a fixing part 61, a rotating part 62, and a bearing 63 assembly connecting the two. The fixing part is used to connect to the stator part 7, the rotating part 62 is used to connect the installation part 5 and the guide vane 4, and the bearing 63 assembly is arranged between the fixing part 61 and the rotating part 62 to provide a stable connection between the two, ensuring that the rotating part 62 can rotate smoothly and precisely around the fixing part 61, thereby realizing the function of driving the installation part 5 and the guide vane 4 to rotate circumferentially.

[0045] In an implementable embodiment, as Figure 2 shown, the fixing part 61 includes a first fixing piece and a second fixing piece. The bearing 63 assembly includes a first bearing 63 and a second bearing 63 coaxially arranged with the impeller 1. The first fixing piece is rotatably connected to the first end of the rotating part 62 through the first bearing 63, and the second fixing piece is rotatably connected to the second end of the rotating part 62 through the second bearing 63.

[0046] Among them, the first fixing piece is connected to the stator part 7 close to the impeller 1, and the second fixing piece is connected to the stator part 7 far from the impeller 1, ensuring that the rotating part 62 can rotate stably between the two fixing pieces, and at the same time facilitating the connection to the stator part 7, improving the utilization rate of the space on the outer peripheral side of the intake pipe.

[0047] Among them, the first fixing member is rotatably connected to the first end of the rotating part 62 through the first bearing 63, and the second fixing member is rotatably connected to the second end of the rotating part 62 through the second bearing 63. The first bearing 63 and the second bearing 63 can adopt thin-walled bearings 63, ensuring the smooth rotation of the rotating part 62 and improving the reliability and durability of the entire device.

[0048] In an implementable manner, the circumferential adjustment mechanism 6 further includes a motor 64 and a transmission mechanism. The motor 64 is connected to the fixing part 61, the first end of the transmission mechanism is power-connected to the output end of the motor 64, and the second end of the transmission mechanism is power-connected to the rotating part 62. The motor 64 drives the rotating part 62 to rotate through the transmission mechanism.

[0049] Among them, the motor 64 can be arranged on a part of the fixing part 61 close to the impeller 1, that is, the motor 64 is arranged on the first fixing member, and the coordinate frame 3 should be avoided during the installation process.

[0050] Among them, the motor 64 can be arranged on a part of the fixing part 61 far from the impeller 1, that is, the motor 64 is arranged on the second fixing member. The outer peripheral side of the second fixing member provides sufficient space for installing the motor 64.

[0051] Among them, the motor 64 is set as the power source of the circumferential adjustment mechanism 6 on the fixing part 61, and provides power for the transmission mechanism through the rotational movement of the output end. The selection of the motor 64 needs to be reasonably matched according to parameters such as the power and speed of the compressor to ensure that it can provide sufficient torque and speed to meet the rotation requirements of the rotating part 62.

[0052] Among them, the transmission mechanism is used to connect the output end of the motor 64 and the rotating part 62, and transmit the rotational movement of the motor 64 to the rotating part 62 to drive its rotation. Through the transmission of the transmission mechanism, it can be ensured that the rotating part 62 can rotate smoothly and accurately, realizing the precise adjustment of the guide vane 4. The transmission mechanism can include transmission elements such as gears, belts, and chains, and the specific form needs to be designed according to requirements such as the structure, speed, and torque of the compressor.

[0053] In an implementable manner, the transmission mechanism includes a meshing first gear 65 and second gear 66. The first gear 65 is connected to the output shaft of the motor 64. When the motor 64 starts, its output shaft drives the first gear 65 to rotate. The rotational movement of the first gear 65 will be used as the input power of the transmission mechanism. The second gear 66 is connected to the rotating part 62 and transmits the rotational movement through meshing with the first gear 65. When the first gear 65 rotates, it drives the second gear 66 to rotate at a certain speed ratio, and the second gear 66 transmits the rotational movement to the rotating part 62, thereby driving the transmission part to rotate. Through the meshing of the first gear 65 and the second gear 66, the transmission mechanism can ensure that the rotational movement of the motor 64 is transmitted to the rotating part 62 smoothly and accurately.

[0054] Furthermore, the transmission mechanism is not limited to the direct meshing of the first gear 65 and the second gear 66, and other gears can be added, which mesh with the first gear 65 or the second gear 66 to form a more complex gear transmission system for precise adjustment of rotational speed or torque.

[0055] In an implementable embodiment, seals are provided between the rotating part 62 and the fixed part 61, and between the fixed part 61 and the stator member 7.

[0056] Among them, the seal can be an OR type PTFE rotary seal. The OR seal, with its unique dual-action design, can provide effective sealing force in two directions, thus greatly reducing the possibility of leakage. The PTFE (polytetrafluoroethylene) material itself has excellent corrosion resistance, high temperature resistance and low friction coefficient, which enables the OR seal to maintain stable sealing performance in harsh working environments. It can significantly improve the sealing performance of the circumferential adjustment mechanism on the basis of ensuring normal operation, thereby improving the operating efficiency and stability of the entire device.

[0057] In an implementable embodiment, as Figure 1 shown, the centrifugal compressor performance test device includes a coordinate frame 3, and the coordinate frame 3 is arranged on the stator member 7 close to the impeller 1. The probe 2 is inserted into the through holes of the coordinate frame 3 and the stator member 7.

[0058] Among them, the coordinate frame 3 is arranged on the outer peripheral side of the stator member 7 close to the impeller 1. Through holes corresponding to the coordinate frame 3 are provided on the stator member 7 close to the impeller 1. The probe 2 passes through the through hole so that the ball head is inserted into the flow field. Since the coordinate frame 3 and the stator member 7 close to the impeller 1 are located in the same cross section, the axial space occupation heights of the coordinate frame 3 and the stator member 7 close to the impeller 1 overlap, which not only reduces the distance between the measuring point of the probe 2 and the impeller 1, but also reduces the distance between the guide vane 4 and the impeller 1.

[0059] Among them, the shank of the probe 2 is very thin and the five-hole ball head has a small volume, so its influence on the flow in the flow field is very small and can be basically ignored. Generally, the guide vane 4 has a certain angle with the intake direction, which can cause airflow distortion and thus affect the flow uniformity.

[0060] In an implementable embodiment, a position adjustment mechanism is provided on the coordinate frame 3. The position adjustment mechanism is connected to the probe 2 and is used to drive the probe 2 to move radially along the impeller 1.

[0061] Among them, in order to achieve precise measurement of the probe 2 at different positions, a position adjustment mechanism is provided on the coordinate frame 3. This mechanism can accurately drive the probe 2 to move along the radial direction of the impeller 1 through mechanical transmission or electronic control, etc., so that the probe 2 measures at different radius positions of the impeller 1, thereby obtaining more comprehensive parameter information.

[0062] It can be understood that between the coordinate frame 3 and the stator member 7, between the stator member 7 and the fixing portion 61, between the transmission mechanism and the stator member 7, and between the transmission mechanism and the mounting portion 5 can all be connected by bolts. The bolt structure is simple, the connection is reliable, and it is easy to disassemble, which can ensure the relative position and stability between each component, thereby ensuring the normal operation of the entire device.

[0063] In the second aspect of the present application, a testing method is provided, which is applied to any centrifugal compressor performance testing device in the first aspect. The steps of the testing method include that the probe 2 moves along the radial direction of the impeller 1 to adjust the position of the probe 2, and the circumferential adjustment mechanism 6 drives the guide vane 4 to move along the circumferential direction of the impeller 1 to adjust the position of the guide vane 4.

[0064] In the flow field of the centrifugal compressor performance testing device, only the guide vane 4 has a greater impact on the flow uniformity. Adjusting the position of the guide vane 4 in the flow field is essentially to adjust the relative position between the guide vane 4 and the probe 2. The circumferential adjustment mechanism drives the guide vane 4 to rotate circumferentially, which can make the probe 2 installed at a position closer to the impeller 1, so that the true flow field situation at the inlet of the impeller 1 can be measured, making the flow regulation of the centrifugal compressor more accurate and efficient.

[0065] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0066] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0067] In view of the foregoing detailed description, these and other changes may be made to these embodiments, and this written description discloses the invention including the best mode of the embodiments. The scope of the patent obtained for the invention is defined by the claims, and the claims are not limited by this disclosure. The scope of protection of the invention is not limited thereto. Any person skilled in the art within the scope disclosed by the invention, making equivalent substitutions or changes according to the technical solution and concept of the invention, is within the scope of protection of the invention.

Claims

1. A centrifugal compressor performance testing device, characterized in that, It includes an intake pipeline, a measuring mechanism and a compressor structure to be measured. The intake pipeline is connected to the compressor structure to be measured, and the measuring mechanism is arranged on the intake pipeline; The compressor structure to be measured includes an impeller (1) and a guide vane (4). The impeller (1) is connected to one end of the intake pipeline, and the guide vane (4) is arranged in the intake pipeline; The measuring mechanism includes a probe (2) and a circumferential adjustment mechanism (6). The spherical head of the probe (2) is located in the flow field of the intake pipeline and between the impeller (1) and the guide vane (4) for measuring the measurement section of the flow field. The circumferential adjustment mechanism (6) drives the guide vane (4) to move to adjust the position of the guide vane (4) relative to the probe (2).

2. The centrifugal compressor performance testing device according to claim 1, characterized in that, The circumferential adjustment mechanism (6) includes a fixed part (61) and a rotating part (62). The fixed part (61) is arranged on the stator part (7) of the intake pipeline. The rotating part (62) is movably connected to the fixed part (61). The rotating part (62) can circumferentially rotate around the axis of the impeller (1), and the rotating part (62) is connected to the guide vane (4) to drive the guide vane (4) to move circumferentially.

3. The centrifugal compressor performance testing device according to claim 2, characterized in that, The centrifugal compressor performance test device includes: An installation part (5). The installation part (5) and the intake pipeline enclose the flow field. The installation part (5) is connected to the rotating part (62), the installation part (5) is connected to the guide vane (4), and the circumferential adjustment mechanism (6) drives the guide vane (4) to rotate through the installation part (5).

4. The centrifugal compressor performance testing device according to claim 3, characterized in that, The circumferential adjustment mechanism (6) further includes a bearing (63) assembly. The fixed part (61) is rotationally connected to the rotating part (62) through the bearing (63) assembly.

5. The centrifugal compressor performance testing device according to claim 4, wherein The fixed part (61) includes a first fixing part and a second fixing part. The bearing (63) assembly includes a first bearing (63) and a second bearing (63) coaxially arranged with the impeller (1). The first fixing part is rotationally connected to the first end of the rotating part (62) through the first bearing (63), and the second fixing part is rotationally connected to the second end of the rotating part (62) through the second bearing (63).

6. The centrifugal compressor performance testing device according to claim 1, characterized in that, The circumferential adjustment mechanism (6) further includes a motor (64) and a transmission mechanism. The motor (64) is connected to the fixed part (61). The first end of the transmission mechanism is power-connected to the output end of the motor (64), and the second end of the transmission mechanism is power-connected to the rotating part (62). The motor (64) drives the rotating part (62) to rotate through the transmission mechanism.

7. The centrifugal compressor performance testing device according to claim 6, characterized in that, The transmission mechanism includes a meshing first gear (65) and second gear (66). The first gear (65) is connected to the output shaft of the motor (64), and the second gear (66) is connected to the rotating part (62).

8. The centrifugal compressor performance testing device according to claim 1, characterized in that, Sealing members are provided between the rotating part (62) and the fixed part (61), and between the fixed part (61) and the stator part (7).

9. The centrifugal compressor performance testing device according to claim 1, characterized in that, The centrifugal compressor performance test device includes: A coordinate frame (3), the coordinate frame (3) is arranged on a stator member (7) close to the impeller, the probe (2) is inserted into through holes of the coordinate frame (3) and the stator member (7), a position adjusting mechanism is arranged on the coordinate frame (3), and the position adjusting mechanism is connected to the probe (2) and is used for driving the probe (2) to move radially along the impeller (1).

10. A testing method, characterized in that, Applied to the centrifugal compressor performance testing device according to any one of claims 1-9, the steps of the testing method include: moving the probe radially along the impeller to adjust the position of the probe; The circumferential adjusting mechanism drives the guide vane to move circumferentially along the impeller to adjust the position of the guide vane.

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