Axial force self-balancing compressor test bench device and use method thereof

Abstract

The present invention discloses an axial force self-balancing compressor test bench device and a method for using the same. The device includes a housing, a compressor rotor, a rotating shaft, a bearing, and a mixing chamber. The housing has a balancing chamber, a first opening, and a second opening. The compressor rotor and the rotating shaft are both disposed within the housing. The compressor rotor is rotatably disposed on the rotating shaft via the bearing. The compressor rotor can generate an axial force in the direction in which the rotating shaft extends. The compressor rotor is rotatable relative to the housing. The balancing chamber is located downstream of the compressor rotor. The mixing chamber is connected to the first opening and the second opening. The airflow between the compressor stages can enter the mixing chamber through the first opening, and the exhaust gas from the compressor can enter the mixing chamber through the second opening. The two airflows can be mixed in the mixing chamber. The mixing chamber is connected to the balancing chamber, and the mixed airflow in the mixing chamber can enter the balancing chamber. The axial force of the axial force self-balancing compressor test bench device of the embodiment of the present invention can be automatically adjusted, and the operation is simple and the safety is high.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbine and aircraft engine testing, and in particular to an axial force self-balancing compressor test bench device and a method for using the same. Background Art

[0002] Compressor test benches are crucial testing facilities for gas turbine and aircraft engine compressor components. During compressor component testing, the pressure differential between the front and rear blade rows generates significant axial forces on the compressor rotor. These forces are then transferred to the stator components and the test bench via the bearing supports. However, these significant axial forces often exceed the load-bearing capacity of the test specimen's bearing supports, leading to bearing support failure and compromising the safe operation of the compressor components and the test bench. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, an embodiment of the present invention provides an axial force self-balancing compressor test bench device and a method for using the same.

[0004] The axial force self-balancing compressor test bench device according to an embodiment of the present invention comprises:

[0005] a housing, the housing having a balancing cavity, a first opening, and a second opening;

[0006] a compressor rotor, a rotating shaft, and a bearing, wherein the compressor rotor and the rotating shaft are both disposed within the housing, the compressor rotor being rotatably mounted on the rotating shaft via the bearing, the compressor rotor being capable of generating an axial force in an extending direction of the rotating shaft, the compressor rotor being rotatable relative to the housing, and the balance chamber being located downstream of the compressor rotor;

[0007] A mixing chamber, wherein the mixing chamber is connected to the first opening and the second opening, the airflow in the compressor interstage can enter the mixing chamber through the first opening, and the exhaust gas of the compressor can enter the mixing chamber through the second opening, the two airflows can be mixed in the mixing chamber, and the mixing chamber is connected to the balancing chamber, and the mixed airflow in the mixing chamber can enter the balancing chamber and generate a force in the balancing chamber that can offset the axial force.

[0008] Furthermore, the axial force self-balancing compressor test bench device also includes:

[0009] a first pipeline and a first control valve, wherein the first pipeline communicates with the first opening and the mixing chamber, and the first control valve is provided at one end of the first pipeline, and the first control valve is used to adjust the flow rate of the airflow flowing into the first pipeline through the first opening;

[0010] A second pipeline and a second control valve, the second pipeline connects the second opening and the mixing chamber, the second control valve is arranged at one end of the second pipeline, and the second control valve is used to adjust the flow rate of the airflow flowing into the second pipeline through the second opening.

[0011] Furthermore, the axial force self-balancing compressor test bench device also includes:

[0012] a first branch and a third control valve, wherein the first branch is connected to the first pipeline and the mixing chamber, and the third control valve is provided on the first branch, and the third control valve is used to adjust the flow rate of the airflow flowing from the first pipeline into the first branch;

[0013] The second branch and the fourth control valve, the second branch connects the second pipeline and the mixing chamber, the fourth control valve is arranged on the second branch, and the fourth control valve is used to adjust the flow rate of the airflow flowing from the second pipeline into the second branch.

[0014] Furthermore, the axial force self-balancing compressor test bench device also includes:

[0015] a first cavity, the first cavity being in communication with the compressor rotor, the first opening being in communication with the first cavity, and the airflow in the compressor interstage being able to flow into the first cavity;

[0016] a first flow meter, the first flow meter being provided in the first branch, and the first flow meter being used to measure the flow rate of the air flow in the first branch;

[0017] A second flow meter is provided in the second branch, and is used for measuring the flow rate of the air flow in the second branch.

[0018] Furthermore, the axial force self-balancing compressor test bench device also includes:

[0019] a first bypass, wherein one end of the first bypass is connected to one end of the second branch adjacent to the second pipeline, and the other end of the first bypass is connected to the other end of the second pipeline;

[0020] A fifth control valve is provided in the first bypass, and is used to control the flow rate of the airflow flowing from the second branch into the second pipeline.

[0021] Furthermore, the axial force self-balancing compressor test bench device also includes:

[0022] a third pipeline and a sixth control valve, wherein the third pipeline is connected to the mixing chamber and the balancing chamber, and the mixed airflow in the mixing chamber can flow into the balancing chamber through the third pipeline; and the sixth control valve is provided in the third pipeline, and is used to control the flow rate of the airflow flowing from the mixing chamber into the balancing chamber;

[0023] A fourth pipeline and a seventh control valve, one end of the fourth pipeline is connected to the mixing chamber, and the mixed air flow in the mixing chamber can flow into the fourth pipeline. The seventh control valve is arranged in the fourth pipeline, and the seventh control valve is used to control the flow rate of the air flow flowing from the mixing chamber into the fourth pipeline.

[0024] Furthermore, the axial force self-balancing compressor test bench device also includes:

[0025] a control member connected to the third control valve and the fourth control valve;

[0026] A sensor is provided in the balancing chamber, wherein the sensor can detect the pressure and temperature of the airflow in the balancing chamber and transmit the detected signal to the control component, and the control component controls the opening of the third control valve and the fourth control valve through the detection signal.

[0027] Furthermore, the axial force self-balancing compressor test bench device also includes:

[0028] a balancing disk, the balancing disk being disposed within the housing and downstream of the compressor rotor; a sealing ring being provided on the inner circumferential surface of the housing; the sealing ring being located between the compressor rotor and the balancing disk and spaced apart from the balancing disk; and a balancing cavity being formed between the sealing ring and the balancing disk;

[0029] A measuring member is provided in the housing and downstream of the balancing disc, and is used to measure the axial force F of the compressor rotor. 测量 The data acquisition frequency of the measuring element (94) is proportional to the speed change rate of the compressor rotor (2).

[0030] Furthermore, the maximum axial force that the bearing can withstand is F 限制 , F 限制 =k×F 允许 , k is the safety factor, 0<k<1 and is inversely proportional to the rate of change of the compressor speed, F 允许 The maximum axial force allowed to be generated by the compressor;

[0031] The balanced axial force is F 测量’ , F 测量’ =F 测量-p1×A, p1 is the pressure of the air flow in the balance chamber (11), p1=(F 测量 -F 测量’ ) / A>(F 测量 -k×F 允许 ) / A, where A is the projected area of ​​the balancing disc (92) in the axial direction.

[0032] A method for using an axial force self-balancing compressor test bench device according to an embodiment of the present invention, wherein the axial force self-balancing compressor test bench device is the axial force self-balancing compressor test bench device described in any of the above embodiments, comprises:

[0033] S1. Before the compressor rotor starts, the axial force F of the bearing is configured 限制 ;

[0034] S2. Compare the axial force F of the compressor rotor 测量 and F 限制 , F 测量 ≤F 限制 When F 测量 >F 限制 When the axial force self-balancing system is activated.

[0035] The beneficial effects of this application are:

[0036] 1. In the axial force self-balancing compressor test bench device of the embodiment of the present invention, the airflow generated by the compressor itself is mixed in the mixing chamber to adjust the pressure of the mixed airflow. The mixed airflow enters the mixing chamber to generate a force opposite to the axial force of the compressor rotor to balance the axial force generated by the compressor rotor, thereby ensuring that the axial force of the compressor rotor can be maintained within the allowable range of the test piece bearing support point, ensuring the safety of the compressor components and the test bench, and moreover, through the rational use of the airflow in the compressor, the investment in air supply equipment is reduced, saving costs. In addition, the airflow and axial force in the compressor can change with the rotation speed of the compressor rotor, and the force generated by the mixed airflow in the mixing chamber also changes with the rotation speed of the compressor rotor, thereby realizing automatic adjustment of the compressor axial force and reducing the number of test operation steps.

[0037] 2. The method for using the axial force self-balancing compressor test bench device according to the embodiment of the present invention is simple to operate and can effectively balance the axial force generated by the compressor rotor, ensuring that the axial force of the compressor rotor remains within the allowable range of the bearing support of the test piece, thereby ensuring the safety of the compressor components and the test bench. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Schematic diagram of an axial force self-balancing compressor test bench device according to an embodiment of the present invention.

[0039] Figure 2 The figure is a schematic diagram of the process of using the axial force self-balancing compressor test bench device according to an embodiment of the present invention.

[0040] Figure numerals: 1. casing; 11. balancing chamber; 12. first opening; 13. second opening; 2. compressor rotor; 3. rotating shaft; 4. mixing chamber; 51. first pipeline; 52. first control valve; 53. second pipeline; 54. second control valve; 55. first measuring point; 56. second measuring point; 61. first branch; 62. third control valve; 63. second branch; 64. fourth control valve; 65. third measuring point; 71. first chamber; 72. first flowmeter; 73. second flowmeter; 81. first bypass; 82. fifth control valve; 83. third pipeline; 84. sixth control valve; 85. fourth pipeline; 86. seventh control valve; 91. sensor; 92. balancing disk; 93. sealing ring; 94. measuring part. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0042] like Figure 1 and Figure 2 As shown, an axial force self-balancing compressor test bench apparatus according to an embodiment of the present invention includes a housing 1, a compressor rotor 2, a rotating shaft 3, bearings (not shown), and a mixing chamber 4. The housing 1 has a balancing chamber 11, a first opening 12, and a second opening 13. The compressor rotor 2 and the rotating shaft 3 are both disposed within the housing 1. The compressor rotor 2 is rotatably mounted on the rotating shaft 3 via a bearing. The compressor rotor 2 can generate an axial force in the direction of extension of the rotating shaft 3. The compressor rotor 2 is rotatable relative to the housing 1. The balancing chamber 11 is located downstream of the compressor rotor 2. The mixing chamber 4 communicates with the first opening 12 and the second opening 13. The airflow within the compressor interstage can enter the mixing chamber 4 through the first opening 12, and the airflow within the housing 1 can enter the mixing chamber 4 through the second opening 13. The two airflows can mix within the mixing chamber 4. The mixing chamber 4 is connected to the balancing chamber 11. The mixed airflow within the mixing chamber 4 can enter the balancing chamber 11 and generate a force within the balancing chamber 11 that can offset the axial force.

[0043] In the axial force self-balancing compressor test bench device of the embodiment of the present invention, the airflow generated by the compressor itself is mixed in the mixing chamber 4 to adjust the pressure of the mixed airflow. The mixed airflow enters the mixing chamber 4 to generate a force opposite to the axial force of the compressor rotor 2 to balance the axial force generated by the compressor rotor 2, ensuring that the axial force of the compressor rotor 2 can be maintained within the allowable range of the test piece bearing support, ensuring the safety of the compressor components and the test bench, and moreover, through the rational use of the airflow in the compressor, the investment in the air supply equipment is reduced, saving costs. In addition, the airflow and axial force in the compressor can change with the rotation speed of the compressor rotor 2, and the force generated by the mixed airflow in the mixing chamber 4 also changes with the rotation speed of the compressor rotor 2, thereby realizing automatic adjustment of the compressor axial force and reducing the test operation steps.

[0044] Specifically, the axial force of the compressor rotor 2 can transfer the load to the stator components and the test bench through the bearing fulcrum. The force generated by the mixed gas in the mixing chamber 4 can balance the axial force, ensuring that the load borne by the bearing is within the allowable range.

[0045] Specifically, the first opening 12 and the second opening 13 are arranged at intervals. The pressure of the bleed air and the bleed air in the compressor interstage is appropriate but the temperature is low and they can enter the mixing chamber 4 through the first opening 12. The pressure and temperature of the exhaust gas in the compressor are both high and can enter the mixing chamber 4 through the second opening 13. The two air flows are mixed in the mixing chamber 4 into air with a specific temperature and pressure to balance the axial force of the compressor.

[0046] Furthermore, the axial force self-balancing compressor test bench apparatus also includes a first pipeline 51, a first control valve 52, a second pipeline 53, and a second control valve 54. The first pipeline 51 connects the first opening 12 and the mixing chamber 4. The first control valve 52 is disposed at one end of the first pipeline 51 and is used to adjust the flow rate of the airflow flowing into the first pipeline 51 through the first opening 12. The second pipeline 53 connects the second opening 13 and the mixing chamber 4. The second control valve 54 is disposed at one end of the second pipeline 53 and is used to adjust the flow rate of the airflow flowing into the second pipeline 53 through the second opening 13.

[0047] Specifically, the bleed air and the bleed air in the compressor interstage enter the first pipeline 51 through the first opening 12, and the flow rate of the bleed air and the bleed air entering the mixing chamber 4 can be adjusted by the first control valve 52; the exhaust gas in the compressor enters the second pipeline 53 through the second opening 13, and the flow rate of the exhaust gas entering the mixing chamber 4 can be adjusted by the second control valve 54, so that the air pressure and temperature in the mixing chamber 4 can meet the requirements of axial force regulation and structural safety.

[0048] Specifically, a first measuring point 55 is provided in the first pipeline 51 and downstream of the first control valve 52 for measuring the pressure and temperature of the gas in the first pipeline 51. A second measuring point 56 is provided in the second pipeline 53 and downstream of the second control valve 54 for measuring the pressure and temperature of the gas in the second pipeline 53.

[0049] Specifically, the first pipeline 51 can be a separately controlled bleed air pipeline or a separately controlled bleed air pipeline. Usually, during the startup phase of the compressor, the bleed air flow is large, and the use of bleed air flow into the mixing chamber 4 does not affect the startup of the compressor; during the stable operation phase of the compressor, the bleed air flow is relatively stable, and the use of bleed air flow into the mixing chamber 4 does not affect the operation of the compressor.

[0050] Furthermore, the axial force self-balancing compressor test bench apparatus also includes a first branch 61, a third control valve 62, a second branch 63, and a fourth control valve 64. The first branch 61 connects the first pipeline 51 and the mixing chamber 4. The third control valve 62 is disposed on the first branch 61 and is used to regulate the flow rate of the airflow flowing from the first pipeline 51 into the first branch 61. The second branch 63 connects the second pipeline 53 and the mixing chamber 4. The fourth control valve 64 is disposed on the second branch 63 and is used to regulate the flow rate of the airflow flowing from the second pipeline 53 into the second branch 63.

[0051] Specifically, a portion of the gas in the first pipeline 51 can enter the mixing chamber 4 through the first branch 61, and the remaining gas in the first pipeline 51 can be discharged into the exhaust tower through the other end of the first pipeline 51. The flow rate of air entering the mixing chamber 4 is regulated by the third control valve 62. A portion of the gas in the second pipeline 53 can enter the mixing chamber 4 through the second branch 63, and the remaining gas in the second pipeline 53 can be discharged into the exhaust tower through the other end of the second pipeline 53. The fourth control valve 64 is a pressure reducing valve, and the air pressure and flow rate in the second branch 63 are regulated by the fourth control valve 64.

[0052] Specifically, depending on the need for balancing air, the fourth control valve 64 can be closed, using only the compressor's bleed and bleed air as balancing air. Alternatively, the third control valve 62 can be closed, using only the compressor's exhaust as balancing air. Alternatively, the bleed and bleed air from the compressor and the exhaust air from the compressor can be used simultaneously as balancing air, with the pressure and temperature of the interstage bleed and exhaust air entering the mixing chamber 4 for adjustment. A third measuring point 65 is provided within the mixing chamber 4 for measuring the pressure and temperature of the gas within the mixing chamber 4.

[0053] Furthermore, the axial force self-balancing compressor test bench apparatus also includes a first chamber 71 and a first flowmeter 72. The first chamber 71 is connected to the compressor rotor 2, and the first opening 12 is connected to the first chamber 71, allowing the airflow within the compressor interstage to flow into the first chamber 71. The first flowmeter 72 is disposed in the first branch 61 and is used to measure the flow rate of the airflow within the first branch 61.

[0054] Specifically, the first chamber 71 serves as an inter-stage compressor intake and exhaust chamber. There are at least two first chambers 71, and at least two first chambers 71 are arranged along the extension direction of the rotating shaft 3. The third control valve 62 can adjust the flow rate of air in the first branch 61 according to the first flowmeter 72 to improve accuracy.

[0055] Furthermore, the axial force self-balancing compressor test bench device also includes a second flow meter 73 , which is provided in the second branch 63 and is used to measure the flow rate of the airflow in the second branch 63 .

[0056] Specifically, the fourth control valve 64 can adjust the flow of air in the second branch 63 according to the second flow meter 73 to improve accuracy.

[0057] Furthermore, the axial force self-balancing compressor test bench apparatus also includes a first bypass 81 and a fifth control valve 82. One end of the first bypass 81 is connected to an end of the second branch 63 adjacent to the second pipeline 53, and the other end of the first bypass 81 is connected to the other end of the second pipeline 53. The fifth control valve 82 is disposed in the first bypass 81 and is used to control the flow rate of the airflow flowing from the second branch 63 into the second pipeline 53.

[0058] Specifically, the fifth control valve 82 and the fourth control valve 64 cooperate to control the air pressure entering the mixing chamber 4. The fourth control valve 64 and the fifth control valve 82 are arranged downstream of the second control valve 54 to avoid the regulation of the fourth control valve 64 and the fifth control valve 82 from adversely affecting the regulation of the second control valve 54.

[0059] Furthermore, the axial force self-balancing compressor test bench device also includes a third pipeline 83, a sixth control valve 84, a fourth pipeline 85, and a seventh control valve 86. The third pipeline 83 connects the mixing chamber 4 and the balancing chamber 11, and the mixed air flow in the mixing chamber 4 can flow into the balancing chamber 11 through the third pipeline 83. The sixth control valve 84 is disposed in the third pipeline 83 and is used to control the flow rate of the air flow from the mixing chamber 4 to the balancing chamber 11. One end of the fourth pipeline 85 is connected to the mixing chamber 4, and the mixed air flow in the mixing chamber 4 can flow into the fourth pipeline 85. The seventh control valve 86 is disposed in the fourth pipeline 85 and is used to control the flow rate of the air flow from the mixing chamber 4 to the fourth pipeline 85.

[0060] Specifically, a portion of the pressure- and temperature-regulated air in mixing chamber 4 enters balancing chamber 11 through third pipeline 83. The remaining portion, based on the air volume required for axial force balancing, is discharged to the test bench exhaust tower through fourth pipeline 85. The air pressure passing through fourth control valve 64 is higher than that passing through second control valve 54. To ensure smooth entry of both air streams into mixing chamber 4, seventh control valve 86 must be maintained at a constant opening.

[0061] Furthermore, the axial force self-balancing compressor test bench apparatus also includes a control unit (not shown) and a sensor 91. The control unit is connected to the third control valve 62 and the fourth control valve 64. Sensor 91 is located in the balancing chamber 11. Sensor 91 detects the pressure and temperature of the airflow within the balancing chamber 11 and transmits the detected signals to the control unit. The control unit then controls the opening of the third control valve 62 and the fourth control valve 64 based on the detected signals.

[0062] Specifically, the control component controls the pressure and temperature of the gas in the mixing chamber 4 by controlling the opening of the third control valve 62 and the fourth control valve 64, thereby controlling the gas and pressure of the air in the balancing chamber 11, and then controlling the force generated by the air in the balancing chamber 11, thereby realizing automatic control of the axial force balance, reducing the test operation steps, ensuring that the compressor support load is within the allowable range, and ensuring structural safety.

[0063] Furthermore, the axial force self-balancing compressor test bench apparatus also includes a balancing disc 92, which is disposed within the casing 1 and downstream of the compressor rotor 2. The inner circumference of the casing 1 is provided with a sealing ring 93, which is located between the compressor rotor 2 and the balancing disc 92 and is spaced apart from the balancing disc 92. The balancing chamber 11 is formed between the sealing ring 93 and the balancing disc 92.

[0064] Furthermore, the axial force self-balancing compressor test bench device also includes a measuring piece 94, which is arranged in the housing 1 and located downstream of the balancing disc 92. The measuring piece 94 is used to measure the axial force F of the compressor rotor 2. 测量 The data acquisition frequency of the measuring component 94 is proportional to the speed change rate of the compressor rotor 2.

[0065] Specifically, the faster the rotation speed of the compressor rotor 2 is, the greater the axial force F of the compressor rotor 2 measured by the measuring member 94 is. 测量 The larger the value is, the slower the rotation speed of the compressor rotor 2 is, and the axial force F of the compressor rotor 2 measured by the measuring element 94 is 测量 The measuring member 94 is a sensor for measuring force, and has various types, such as a thrust sensor.

[0066] Specifically, the opening of the third control valve 62 and the fourth control valve 64 is controlled by the pressure of the air flow in the balance chamber 11 detected by the sensor 91, so as to automatically adjust the pressure p1 of the air flow in the balance chamber 11, thereby achieving the axial force F 测量 Automatic adjustment reduces the test operation steps, ensures that the compressor support load is within the allowable range, and ensures the safety of the compressor and test structure.

[0067] Furthermore, the maximum axial force that the shaft can withstand is F 限制 , F 限制 =k×F 允许 , k value is the safety factor, 0<k<1 and is inversely proportional to the rate of change of the compressor speed.

[0068] Specifically, F 限制 is the maximum load capacity of the bearing, preferably, 0.8<k<0.9. 允许 The maximum value of the axial force allowed to be generated by the compressor. 测量 Greater than F 限制 When the sixth control valve 84 is opened, the air in the mixing chamber 4 flows into the balance chamber 11 to reduce the axial force F of the compressor rotor 2. 测量 Offset to ensure that the bearing support load is within the required range.

[0069] Furthermore, the balanced axial force is F 测量’ , F 测量’ =F 测量 -p1×A, p1 is the pressure of the air flow in the balance chamber 11, p1=(F 测量 -F 测量’ ) / A>(F 测量 -k×F 允许 ) / A, where A is the projected area of ​​the balancing disc 92 in the axial direction.

[0070] Specifically, p1=(F 测量 -F 测量’ ) / A>(F 测量 -k×F 允许 ) / A,F 测量 Greater than F 限制 When the airflow is introduced into the balance chamber 11 through the mixing chamber 4, the size of the airflow is adjusted by adjusting the opening of the sixth control valve 84. The greater the speed of the compressor rotor 2, the greater the axial force F generated. 测量 The larger the value, the greater the air flow required in the balance chamber 11; the smaller the speed of the compressor rotor 2, the greater the axial force F generated. 测量 The smaller it is, the smaller the air flow required in the balancing chamber 11 is.

[0071] Specifically, the air pressure in the mixing chamber 4 is p2, where p2 = p1. The magnitude of pressure p2 is controlled by the third control valve 62, the fourth control valve 64, the fifth control valve 82, and the seventh control valve 86. This establishes a relationship between the openings of the third control valve 62, the fourth control valve 64, the fifth control valve 82, and the seventh control valve 86 and the rate of change of the compressor rotor 2's speed. The seventh control valve 86 is a normally open valve, and in this embodiment, its initial opening is 50%. The third control valve 62 is also a normally open valve, and in this embodiment, its initial opening is 50%. The fourth control valve 64 and the fifth control valve 82 act as main regulating valves, adjusting their valve openings based on the pressure p2 requirement.

[0072] The method for using the axial force self-balancing compressor test bench device according to the embodiment of the present invention includes:

[0073] S1. Before the compressor rotor starts, the axial force F of the bearing is configured 限制 .

[0074] Specifically, the method for using the axial force self-balancing compressor test bench device according to the embodiment of the present invention further includes S11:

[0075] S11. Set up the measuring piece 94 and measure the axial force F generated by the compressor rotor through the measuring piece. 测量 .

[0076] S2. Compare the axial force F of the compressor rotor 测量 and F 限制 , F 测量 ≤F 限制 When the axial force self-balancing system is not started, the measuring component continues to collect axial force data according to the speed change rate of the compressor rotor. 测量 >F 允许 When the axial force self-balancing system is activated.

[0077] The method for using the axial force self-balancing compressor test bench device in an embodiment of the present invention is simple to operate and can effectively balance the axial force generated by the compressor rotor, ensuring that the axial force of the compressor rotor remains within the allowable range of the test piece bearing support point, thereby ensuring the safety of the compressor components and the test bench.

[0078] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0080] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0081] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0082] In the present invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations 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 any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless they are mutually inconsistent.

[0083] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present invention.

Claims

1. An axial force self-balancing compressor test bench device, characterized in that: include: A housing (1), the housing (1) having a balancing chamber (11), a first opening (12) and a second opening (13); A compressor rotor (2), a rotating shaft (3) and a bearing, wherein the compressor rotor (2) and the rotating shaft (3) are both arranged in the housing (1), the compressor rotor (2) is rotatably arranged on the rotating shaft (3) via the bearing, the compressor rotor (2) can generate an axial force in the extending direction of the rotating shaft (3), the compressor rotor (2) is rotatable relative to the housing (1), and the balance chamber (11) is located downstream of the compressor rotor (2); A mixing chamber (4), wherein the mixing chamber (4) is connected to the first opening (12) and the second opening (13), the airflow in the compressor interstage can enter the mixing chamber (4) through the first opening (12), and the exhaust gas of the compressor can enter the mixing chamber (4) through the second opening (13), and the two airflows can be mixed in the mixing chamber (4), and the mixing chamber (4) is connected to the balancing chamber (11), and the mixed airflow in the mixing chamber (4) can enter the balancing chamber (11) and generate a force in the balancing chamber (11) that can offset the axial force.

2. The axial force self-balancing compressor test bench device according to claim 1 is characterized in that: Also includes: a first pipeline (51) and a first control valve (52), wherein the first pipeline (51) is connected to the first opening (12) and the mixing chamber (4), and the first control valve (52) is provided at one end of the first pipeline (51), and the first control valve (52) is used to adjust the flow rate of the airflow flowing into the first pipeline (51) through the first opening (12); A second pipeline (53) and a second control valve (54), wherein the second pipeline (53) is connected to the second opening (13) and the mixing chamber (4), and the second control valve (54) is arranged at one end of the second pipeline (53), and the second control valve (54) is used to adjust the flow rate of the airflow flowing into the second pipeline (53) through the second opening (13).

3. The axial force self-balancing compressor test bench device according to claim 2 is characterized in that: Also includes: a first branch (61) and a third control valve (62), wherein the first branch (61) is connected to the first pipeline (51) and the mixing chamber (4), and the third control valve (62) is provided on the first branch (61), and the third control valve (62) is used to adjust the flow rate of the airflow flowing from the first pipeline (51) into the first branch (61); A second branch (63) and a fourth control valve (64), wherein the second branch (63) is connected to the second pipeline (53) and the mixing chamber (4), and the fourth control valve (64) is arranged on the second branch (63), and the fourth control valve (64) is used to adjust the flow rate of the airflow flowing from the second pipeline (53) into the second branch (63).

4. The axial force self-balancing compressor test bench device according to claim 3 is characterized in that: Also includes: a first cavity (71), the first cavity (71) being in communication with the compressor rotor (2), the first opening (12) being in communication with the first cavity (71), and the airflow in the compressor interstage being able to flow into the first cavity (71); a first flow meter (72), the first flow meter (72) being provided in the first branch (61), the first flow meter (72) being used to measure the flow rate of the airflow in the first branch (61); A second flow meter (73) is provided in the second branch (63), and the second flow meter (73) is used to measure the flow rate of the air flow in the second branch (63).

5. The axial force self-balancing compressor test bench device according to claim 3 is characterized in that: Also includes: a first bypass (81), one end of the first bypass (81) being in communication with one end of the second branch (63) adjacent to the second pipeline (53), and the other end of the first bypass (81) being in communication with the other end of the second pipeline (53); A fifth control valve (82) is provided in the first bypass (81), and the fifth control valve (82) is used to control the flow rate of the airflow flowing from the second branch (63) into the second pipeline (53).

6. The axial force self-balancing compressor test bench device according to claim 1, characterized in that: Also includes: a third pipeline (83) and a sixth control valve (84), wherein the third pipeline (83) is connected to the mixing chamber (4) and the balancing chamber (11), and the mixed airflow in the mixing chamber (4) can flow into the balancing chamber (11) through the third pipeline (83); and the sixth control valve (84) is provided in the third pipeline (83), and is used to control the flow rate of the airflow flowing from the mixing chamber (4) into the balancing chamber (11); A fourth pipeline (85) and a seventh control valve (86), one end of the fourth pipeline (85) is communicated with the mixing chamber (4), and the other end of the fourth pipeline (85) is communicated with the test bench exhaust tower, and the mixed air flow in the mixing chamber (4) can flow into the fourth pipeline (85), and the seventh control valve (86) is provided in the fourth pipeline (85), and the seventh control valve (86) is used to control the flow rate of the air flow flowing from the mixing chamber (4) into the fourth pipeline (85).

7. The axial force self-balancing compressor test bench device according to claim 3 is characterized in that: Also includes: a control member connected to the third control valve (62) and the fourth control valve (64); A sensor (91) is provided in the balancing chamber (11). The sensor (91) can detect the pressure and temperature of the airflow in the balancing chamber (11) and transmit the detected signal to the control element. The control element controls the opening of the third control valve (62) and the fourth control valve (64) according to the detection signal.

8. The axial force self-balancing compressor test bench device according to claim 7, characterized in that: Also includes: A balancing disc (92), the balancing disc (92) being arranged in the housing (1) and downstream of the compressor rotor (2), the inner circumferential surface of the housing (1) being provided with a sealing ring (93), the sealing ring (93) being located between the compressor rotor (2) and the balancing disc (92) and spaced apart from the balancing disc (92), the balancing cavity (11) being formed between the sealing ring (93) and the balancing disc (92); A measuring member (94) is provided in the housing (1) and is located downstream of the balancing disc (92). The measuring member (94) is used to measure the axial force F of the compressor rotor (2). 测量 The data acquisition frequency of the measuring element (94) is proportional to the speed change rate of the compressor rotor (2).

9. The axial force self-balancing compressor test bench device according to claim 8, characterized in that: The maximum axial force that the bearing can withstand is F 限制 , F 限制 =k×F 允许 , k is the safety factor, 0<k<1 and is inversely proportional to the rate of change of the compressor speed, F 允许 The maximum axial force allowed to be generated by the compressor; The balanced axial force is F 测量’ , F 测量’ =F 测量 -p1×A, p1 is the pressure of the air flow in the balance chamber (11), p1=(F 测量 -F 测量’ ) / A>(F 测量 -k×F 允许 ) / A, where A is the projected area of ​​the balancing disc (92) in the axial direction.

10. A method for using an axial force self-balancing compressor test bench device, characterized in that: The axial force self-balancing compressor test bench device is the axial force self-balancing compressor test bench device described in any one of claims 1 to 9, comprising: S1. Before the compressor rotor starts, the axial force F of the bearing is configured 限制 , F 限制 is the maximum axial force that the bearing can withstand, F 限制 =k×F 允许 , k is the safety factor, 0<k<1 and is inversely proportional to the rate of change of the compressor speed, F 允许 The maximum axial force allowed to be generated by the compressor; S2. Compare the axial force F of the compressor rotor 测量 and F 限制 , F 测量 ≤F 允许 When F 测量 >F 允许 When the axial force self-balancing system is activated.

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