Axial flow compressor thrust clearance adjusting device and measuring method

Abstract

The invention provides an axial flow compressor thrust clearance adjusting device and a measuring method, belongs to the technical field of compressors, and is used for solving the problem that thrust clearance adjustment has certain difficulty. The axial flow compressor thrust clearance adjusting device comprises an adjusting pressing plate, a connector and an adjusting bolt. The adjusting pressing plate is arranged on the tail portion of a machine shell of the axial flow compressor. A center hole is formed in the adjusting pressing plate. The connector is arranged on the end face of the end, facing the adjusting pressing plate, of the rotor, and the position of the connector corresponds to the center hole. One end of the adjusting bolt penetrates through the center hole and is connected to the connector. And a first nut and a second nut are arranged on the adjusting bolt. The first nut and the second nut are located on the two sides of the adjusting pressing plate respectively. By adjusting the first nut and the second nut, the adjusting bolt can be driven to move on the adjusting pressing plate, and then the rotor is driven to move in the axial direction so as to adjust the thrust clearance. The accuracy of thrust clearance adjustment and measurement is improved, and the operation difficulty is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of compressors, and in particular relates to a thrust clearance adjustment device and a measurement method for an axial flow compressor. Background Art

[0002] The thrust clearance of an axial compressor refers to the clearance between the thrust pad and the thrust plate in the axial direction of the rotor. During the operation of the axial compressor, due to the inconsistent gas forces on both sides of each stage of the impeller, the rotor will be subjected to a combined force directed to the low-pressure end, which is called the axial force. The axial force is not conducive to the normal operation of the compressor. It causes the rotor to move toward one end. Therefore, there needs to be a strict thrust clearance between the thrust plate and the thrust pad to ensure that a strong oil film is established between the thrust plate and the thrust pad, so that the rotor has enough room for movement during high-speed operation. The size of the thrust clearance will change during the operation of the axial compressor. The size of the thrust clearance is particularly important for the normal operation of the axial compressor. If the thrust clearance is too small, the friction loss between the thrust pad and the thrust plate will increase, resulting in an increase in the temperature of the thrust pad and easy wear; if the thrust clearance is too large, when the thrust changes suddenly, the thrust pad will be subjected to excessive impact, and may cause excessive changes in the clearance between the moving and static parts, causing axial friction collision. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide an axial flow compressor thrust clearance adjustment device and a measurement method, which can adjust and measure the thrust clearance of the axial flow compressor.

[0004] In a first aspect, the present invention provides a thrust clearance adjustment device for an axial compressor, comprising: an adjustment pressure plate, a joint and an adjustment bolt. The adjustment pressure plate is arranged on the rear part of the casing of the axial compressor. A center hole is provided on the adjustment pressure plate. The joint is arranged on the end face of the rotor facing the adjustment pressure plate, and the position of the joint corresponds to the center hole. One end of the adjustment bolt passes through the center hole and is connected to the joint. A first nut and a second nut are provided on the adjustment bolt. The first nut and the second nut are respectively located on both sides of the adjustment pressure plate. By adjusting the first nut and the second nut, the adjustment bolt can be driven to move on the adjustment pressure plate, thereby driving the rotor to move axially to adjust the thrust clearance.

[0005] Optionally, the thrust clearance adjustment device of the axial compressor further comprises a displacement detection device, which is arranged on the casing and is used to detect the displacement of the rotor in the axial direction.

[0006] Optionally, the rear portion of the housing includes a stator and a protective cover. The rotor is rotatably arranged on the stator. The protective cover is arranged on the stator and buckles the rear portion of the rotor therein. The upper portion of the adjustment plate is connected to the protective cover by a pair of first bolt assemblies. The lower portion of the adjustment plate is connected to the stator by a pair of second bolt assemblies.

[0007] Optionally, the upper portion of the adjustment plate includes a pair of first elongated holes. Each first bolt assembly fixes the adjustment plate to the protective cover through a first elongated hole. The lower portion of the adjustment plate includes a pair of second elongated holes. Each second bolt assembly fixes the adjustment plate to the stator through a second elongated hole. The extension lines of the pair of first elongated holes and the extension lines of the pair of second elongated holes intersect on the axis of the center hole.

[0008] Optionally, the first bolt assembly includes a first bolt and a first pad. The first pad is arranged between the adjustment plate and the protective cover. The rod of the first bolt passes through the adjustment plate and the first pad in sequence, and is connected to the protective cover. The second bolt assembly includes a second bolt and a second pad. The second pad is arranged between the adjustment plate and the stator. The rod of the second bolt passes through the adjustment plate and the second pad in sequence, and is connected to the stator.

[0009] Optionally, the joint includes a first end and a second end. The first end is provided with an external thread. The joint is connected to the threaded hole on the rotor end surface through the external thread. The second end is provided with an internal thread. The adjusting bolt is connected to the joint through the internal thread.

[0010] Optionally, there are multiple connectors, and the external thread specifications of the multiple connectors are different.

[0011] Optionally, the adjusting bolt includes a rod, a head and a connecting portion. The head and the connecting portion are respectively arranged at two ends of the rod. The rod is provided with an external thread. The first nut and the second nut are arranged on the rod and connected to the rod through the external thread. The connecting portion is connected to the joint through threaded cooperation. The head is prismatic.

[0012] Optionally, the rod portion, the head portion and the connecting portion are integrally formed.

[0013] In a second aspect, the present invention provides a method for measuring the thrust clearance of an axial flow compressor, using the above-mentioned thrust clearance adjustment device for an axial flow compressor, the measuring method comprises the following steps:

[0014] The displacement detection device is arranged on the housing, and the detection end of the displacement detection device is directed toward the rotor;

[0015] Adjust the first nut and the second nut so that the adjusting bolt moves toward the side where the first nut is located, thereby driving the rotor to move;

[0016] When the reading of the displacement detection device no longer changes, stop adjusting the first nut and the second nut, and record the reading X1 of the displacement detection device;

[0017] Adjust the first nut and the second nut in the opposite direction, so that the adjusting bolt moves toward the side where the second nut is located, thereby driving the rotor to move in the opposite direction;

[0018] When the reading of the displacement detection device no longer changes, stop reversely adjusting the first nut and the second nut, and record the reading X2 of the displacement detection device;

[0019] Obtain thrust clearance B = |X1-X2|.

[0020] Beneficial Effects

[0021] The thrust clearance adjustment device and measurement method of the axial flow compressor provided by the present invention utilize the cooperation of the adjusting pressure plate, the joint and the adjusting bolt to drive the rotor to move, thereby adjusting the thrust clearance between the thrust plate and the thrust washer, and can measure the thrust clearance, thereby improving the accuracy of the thrust clearance adjustment and measurement, reducing the difficulty of operation, and there is no need to disassemble the internal structure of the rotor and the stator, and has a large scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of an axial flow compressor thrust clearance adjustment device according to an embodiment of the present invention;

[0023] Figure 2 A schematic structural diagram of an adjustment pressure plate provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the structure of a connector according to an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the structure of an adjusting bolt according to an embodiment of the present invention;

[0026] Figure 5 A flow chart of a method for measuring thrust clearance of an axial compressor according to an embodiment of the present invention.

[0027] The reference numerals are as follows:

[0028] 1. Adjusting plate; 2. Joint; 3. Adjusting bolt; 4. First bolt assembly; 5. Second bolt assembly; 6. Casing; 7. Rotor; 8. Thrust plate; 9. Thrust washer;

[0029] 11. Center hole; 12. First long hole; 13. Second long hole;

[0030] 21. first end; 22. second end; 23. first external thread; 24. internal thread;

[0031] 31. first nut; 32. second nut; 33. rod; 34. head; 35. connecting portion; 36. second external thread; 37. third external thread;

[0032] 41. a first bolt; 42. a first pad;

[0033] 51. second bolt; 52. second pad;

[0034] 61. stator; 62. protective cover. DETAILED DESCRIPTION

[0035] 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" and the like 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0039] In a first aspect, this embodiment provides a thrust clearance adjustment device for an axial compressor. Figure 1 A schematic structural diagram of a thrust clearance adjustment device for an axial compressor provided in this embodiment.

[0040] like Figure 1As shown, the thrust clearance adjustment device of the axial flow compressor of this embodiment includes: an adjustment pressure plate 1, a joint 2 and an adjustment bolt 3. The adjustment pressure plate 1 is arranged on the rear part of the casing 6 of the axial flow compressor. A center hole 11 is provided on the adjustment pressure plate 1. The joint 2 is arranged on the end surface of the rotor 7 facing the adjustment pressure plate 1, and the position of the joint 2 corresponds to the center hole 11. One end of the adjustment bolt 3 passes through the center hole 11 and is connected to the joint 2. A first nut 31 and a second nut 32 are provided on the adjustment bolt 3. The first nut 31 and the second nut 32 are respectively located on both sides of the adjustment pressure plate 1. By adjusting the first nut 31 and the second nut 32, the adjustment bolt 3 can be driven to move on the adjustment pressure plate 1, and then the rotor 7 can be driven to move axially to adjust the thrust clearance.

[0041] When the thrust clearance adjustment device of this embodiment is in use, the movement of the rotor 7 is achieved by adjusting the first nut 31 and the second nut 32. Specifically: when the rotor 7 needs to be moved axially toward the inside of the housing 6, the second nut 32 is first unscrewed to make the second nut 32 away from the adjustment plate 1; then the first nut 31 is tightened to press the first nut 31 on the adjustment plate 1, thereby pushing the rotor 7 to move toward the inside of the housing 6, that is, achieving the axial movement of the rotor 7 to the left. When the rotor 7 needs to be moved axially toward the outside of the housing 6, the first nut 31 is first unscrewed to make the first nut 31 away from the adjustment plate 1; then the second nut 32 is tightened to press the second nut 32 on the adjustment plate 1, thereby pulling the rotor 7 to move toward the outside of the housing 6, that is, achieving the axial movement of the rotor 7 to the right.

[0042] The thrust clearance adjustment device of the axial flow compressor of this embodiment utilizes the cooperation of the adjusting pressure plate 1, the joint 2 and the adjusting bolt 3 to drive the rotor 7 to move, and then adjusts the thrust clearance between the thrust plate 8 and the thrust washer 9, thereby improving the accuracy of the thrust clearance adjustment, reducing the difficulty of operation, and eliminating the need to disassemble the internal structure of the rotor 7 and the casing 6, and has a large scope of application.

[0043] In some embodiments, see Figure 1 The thrust clearance adjustment device of the axial flow compressor further comprises a displacement detection device. The displacement detection device is arranged on the casing 6. The displacement detection device is used to detect the displacement of the rotor 7 in the axial direction.

[0044] The displacement detection device of this embodiment includes a dial gauge, a micrometer, and a linear displacement sensor. If a dial gauge or a micrometer is used, the dial gauge or the micrometer base needs to be adsorbed on the housing 6, and the pointer of the dial gauge or the micrometer needs to be supported on the axial end face of the rotor 7. If a linear displacement sensor is used, the linear displacement sensor can be installed on the rotor 7.

[0045] The thrust clearance adjustment device of the axial flow compressor of this embodiment also includes a displacement detection device, which can measure the axial displacement of the rotor 7, and can be used to feedback the adjustment amount of the thrust clearance to improve the accuracy of the thrust clearance adjustment, and can also be used to measure the thrust clearance.

[0046] In some embodiments, Figure 1 As shown, the rear part of the housing 6 includes a stator 61 and a protective cover 62. The rotor 7 is rotatably arranged on the stator 62. The protective cover 61 is arranged on the stator 62 and buckles the rear part of the rotor 7 therein. The upper part of the adjustment plate 1 is connected to the protective cover 61 through a pair of first bolt assemblies 4. The lower part of the adjustment plate 1 is connected to the stator 62 through a pair of second bolt assemblies 5.

[0047] The adjusting pressure plate 1 of this embodiment is the main body of the axial thrust clearance adjustment device of the axial flow compressor, so the adjusting pressure plate 1 is set between the stator 62 and the protective cover 61 through the first bolt assembly 4 and the second bolt assembly 5, and the upper and lower parts are fixed together to realize the connection and fixation of the adjusting pressure plate 1 and the casing 6 of the axial flow compressor, which can ensure that the adjusting pressure plate 1 has sufficient supporting force. At the same time, the first bolt assembly 4 and the second bolt assembly 5 are used to fix the adjusting pressure plate 1, which is convenient for the installation and removal of the adjusting pressure plate 1 and more convenient to use.

[0048] Figure 2 A schematic diagram of the structure of an adjustment plate provided in this embodiment. Figure 1 and Figure 2 As shown, the upper portion of the adjustment platen 1 includes a pair of first elongated holes 12. Each first bolt assembly 4 fixes the adjustment platen 1 to the protective cover 61 through a first elongated hole 12. The lower portion of the adjustment platen 1 includes a pair of second elongated holes 13. Each second bolt assembly 5 fixes the adjustment platen 1 to the stator 61 through a second elongated hole 13. The extension lines of the pair of first elongated holes 12 and the extension lines of the pair of second elongated holes 13 intersect on the axis of the center hole 11.

[0049] like Figure 2 As shown, both ends of the length direction of the first elongated hole 12 and the second elongated hole 13 of this embodiment adopt a U-shaped structure, which can facilitate the installation of the first bolt assembly 4 and the second bolt assembly 5, and at the same time avoid stress concentration caused by the angle between the hole walls of the first elongated hole 12 or the second elongated hole 13, which is beneficial to improving the structural strength of the adjustment pressure plate 1.

[0050] The adjustment pressure plate 1 of this embodiment adopts the first elongated hole 12 and the second elongated hole 13 to cooperate with the first bolt assembly 4 and the second bolt assembly 5 to achieve fixation, and the extension lines of a pair of first elongated holes 12 and the extension lines of a pair of second elongated holes 13 intersect on the axis of the center hole 11. It can be suitable for installation at the rear of a variety of different specifications of casings 6, has a wide range of applications, and has good versatility.

[0051] In some embodiments, Figure 1 As shown, the first bolt assembly 4 includes a first bolt 41 and a first pad 42. The first pad 42 is arranged between the adjustment plate 1 and the protective cover 61. The rod of the first bolt 41 passes through the adjustment plate 1 and the first pad 42 in sequence, and is connected to the protective cover 61. The second bolt assembly 5 includes a second bolt 51 and a second pad 52. The second pad 52 is arranged between the adjustment plate 1 and the stator 62. The rod of the second bolt 51 passes through the adjustment plate 1 and the second pad 52 in sequence, and is connected to the stator 62.

[0052] The first bolt assembly 4 of the present embodiment includes a first bolt 41 and a first pad 42. The first pad 42 is arranged between the adjustment pressure plate 1 and the protective cover 61 to protect the protective cover 61 and avoid the protective cover 61 from being indented during the thrust clearance adjustment process, thereby affecting the installation of the rear end cover of the housing 6. Figure 1 As shown, the rod of the first bolt 41 passes through the adjustment plate 1, the first pad 42, the protective cover 61 in sequence and is connected to the nut. A gasket is provided between the head of the first bolt 41 and the adjustment plate 1 to protect the adjustment plate 1.

[0053] The second bolt assembly 5 of this embodiment includes a second bolt 51 and a second pad 52. The second pad 52 is arranged between the adjustment pressure plate 1 and the stator 62 to protect the stator 62 and prevent the stator 62 from being indented during the thrust clearance adjustment process, thereby affecting the installation of the rear end cover of the housing 6. Figure 1 As shown, the rod of the second bolt 51 passes through the adjustment plate 1 and the second pad 52 in sequence, and is connected to the stator 61. A gasket is also provided between the head of the second bolt 51 and the adjustment plate 1 to protect the adjustment plate 1.

[0054] Figure 3 A schematic diagram of the structure of a connector provided in this embodiment. Figure 3 As shown, the joint 2 includes a first end 21 and a second end 22. The first end 21 is provided with a first external thread 23. The joint 2 is connected to the threaded hole on the end surface of the rotor 7 through the first external thread 23. The second end 22 is provided with an internal thread 24. The adjusting bolt 3 is connected to the joint 2 through the internal thread 24.

[0055] The first end 21 of the joint 2 of this embodiment is provided with a first external thread 23, which is connected to the threaded hole on the end surface of the rotor 7 through the first external thread 23, so as to facilitate the installation and removal of the joint 2. The adjusting bolt 3 is matched with the joint 2 through the internal thread 24, so as to facilitate the assembly of the joint 2 and the adjusting bolt 3.

[0056] In some embodiments, see Figure 3 There are multiple connectors 2, and the first external thread 23 of each connector 2 has different specifications.

[0057] The number of connectors 2 in this embodiment is multiple, and the first external thread 23 of each connector 2 has different specifications, and has a certain degree of interchangeability. According to the specifications of the internal thread of the shaft head of different rotors 7, the adaptable connector 2 can be replaced to achieve a universal design of the connector 2, improve applicability, and reduce waste of materials and processing costs.

[0058] Figure 4 Schematic diagram of the structure of an adjustment bolt 3 provided in this embodiment. In some embodiments, Figure 4 As shown, the adjusting bolt 3 includes a rod 33, a head 34 and a connecting portion 35. The head 34 and the connecting portion 35 are respectively arranged at both ends of the rod 33. The rod 33 is provided with a second external thread 36. The first nut 31 and the second nut 32 are arranged on the rod 33 and are connected to the rod 33 through the second external thread 36. The connecting portion 35 is connected to the joint 2 through threaded cooperation. The head 34 is prismatic.

[0059] In this embodiment, if Figure 4 As shown, the connecting portion 35 is provided with a third external thread 37 , and the connecting portion 35 can be connected to the internal thread 24 of the connector 2 through the third external thread 37 .

[0060] The head 34 of the adjusting bolt 3 of the present embodiment is in the shape of a prism, which facilitates the rotation of the adjusting bolt 3 and further facilitates the connection of the adjusting bolt 3 to the joint 2 or removal from the joint.

[0061] In some embodiments, Figure 4 As shown, the rod portion 33, the head portion 34 and the connecting portion 35 are integrally formed.

[0062] The rod portion 33, the head portion 34 and the connecting portion 35 of this embodiment are integrally formed, which is easy to process and has good structural strength.

[0063] In a second aspect, this embodiment provides a method for measuring the thrust clearance of an axial flow compressor, utilizing the above-mentioned thrust clearance adjustment device of the axial flow compressor. Figure 5 A flow chart of a method for measuring thrust clearance of an axial compressor provided in this embodiment.

[0064] like Figure 5As shown, the axial flow compressor thrust clearance measurement method of this embodiment includes the following steps:

[0065] S1. The displacement detection device is disposed on the housing 6, and the detection end of the displacement detection device is directed toward the rotor 7;

[0066] Specifically, in this embodiment, the displacement detection device adopts a dial indicator, the dial indicator seat is adsorbed on the middle surface of the housing 6, and the dial indicator pointer is supported on the axial end surface of the rotor 7.

[0067] S2. Adjust the first nut 31 and the second nut 32 so that the adjusting bolt 3 moves toward the side where the first nut 31 is located, thereby driving the rotor 7 to move;

[0068] Specifically, unscrew the second nut 32 to move the second nut 32 away from the adjustment plate 1; then tighten the first nut 31 to press the first nut 31 against the adjustment plate 1, thereby pushing the rotor 7 to move toward the inside of the casing 6, that is, realizing the movement of the rotor 7 toward the side where the first nut 31 is located.

[0069] S3. When the reading of the displacement detection device no longer changes, stop adjusting the first nut 31 and the second nut 32, and record the reading X1 of the displacement detection device;

[0070] Specifically, when the reading of the displacement detection device no longer changes, it means that the end face of one side of the thrust plate 8 is tightly against the thrust washer 9, and even if the first nut 31 is adjusted again, the reading of the dial indicator no longer changes, that is, the rotor 7 is considered to have been adjusted in place. At this time, the dial indicator can also be reset to zero, and the reading X1 recorded at this time is 0.

[0071] S4. Reversely adjust the first nut 31 and the second nut 32 so that the adjustment bolt 3 moves toward the side where the second nut 32 is located, thereby driving the rotor 7 to move in the opposite direction;

[0072] Specifically, first unscrew the first nut 31 to move the first nut 31 away from the adjustment plate 1; then tighten the second nut 32 to press the second nut 2 against the adjustment plate 1, thereby pulling the rotor 7 to move toward the outside 6 of the casing, that is, realizing the reverse movement of the rotor 7.

[0073] S5. When the reading of the displacement detection device no longer changes, stop reversely adjusting the first nut 31 and the second nut 32, and record the reading X2 of the displacement detection device;

[0074] Specifically, when the reading of the displacement detection device no longer changes, it means that the other end face of the thrust plate 8 is tightly against the other thrust washer 9. Even if the second nut 32 is adjusted again, the dial indicator reading no longer changes, which means that the rotor 7 has been reversely adjusted into place.

[0075] S6. Obtain thrust clearance B = |X1-X2|.

[0076] Before step S1, the thrust clearance adjustment device of the axial compressor of the above embodiment needs to be installed. Figure 1 First, install the joint 2 on the end face of the rotor 7, and then install the adjusting pressure plate 1 at the tail of the casing 6, so that one end of the adjusting bolt 3 passes through the second nut 32, the adjusting pressure plate 1, and the first nut 31 in sequence and is connected to the joint 2, thus completing the installation of the thrust clearance adjustment device of the axial flow compressor.

[0077] The thrust clearance measurement method of the axial flow compressor of the present embodiment utilizes the cooperation of the adjusting pressure plate 1, the joint 2 and the adjusting bolt 3 to drive the rotor 7 to move, thereby adjusting the thrust clearance between the thrust plate 8 and the thrust washer 9, and can measure the thrust clearance, thereby improving the accuracy of the thrust clearance adjustment and measurement, reducing the difficulty of operation, and there is no need to disassemble the internal structure of the rotor 7 and the stator 62, and has a large scope of application.

[0078] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed. In addition, it can be understood that the thrust clearance adjustment device and measurement method of the axial flow compressor of the present embodiment are not limited to the thrust clearance adjustment and measurement of the axial flow compressor, and the clearances of other similar structures can also be adjusted by the thrust clearance adjustment device and measurement method of the axial flow compressor of the present embodiment.

[0079] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A thrust clearance adjustment device for an axial flow compressor, characterized in that: include: An adjusting pressure plate is arranged on the rear part of the casing of the axial flow compressor; a center hole is arranged on the adjusting pressure plate; A joint is arranged on an end surface of the rotor facing the adjusting pressure plate, and the position of the joint corresponds to the center hole; an adjusting bolt, one end of which passes through the central hole and is connected to the joint; a first nut and a second nut are provided on the adjusting bolt; the first nut and the second nut are respectively located on two sides of the adjusting pressure plate; By adjusting the first nut and the second nut, the adjusting bolt can be driven to move on the adjusting pressure plate, thereby driving the rotor to move axially to adjust the thrust clearance.

2. The axial flow compressor thrust clearance adjustment device according to claim 1, characterized in that: Also includes: A displacement detection device is arranged on the housing; the displacement detection device is used to detect the axial displacement of the rotor.

3. The thrust clearance adjustment device for an axial flow compressor according to claim 1, characterized in that: The rear part of the housing includes a stator and a protective cover; the rotor is rotatably arranged on the stator; the protective cover is arranged on the stator and buckles the rear part of the rotor inside; The upper portion of the adjustment pressure plate is connected to the protection cover through a pair of first bolt assemblies; The lower part of the adjustment pressure plate is connected to the stator through a pair of second bolt assemblies.

4. The axial flow compressor thrust clearance adjustment device according to claim 3, characterized in that: The upper portion of the adjustment pressure plate includes a pair of first elongated holes; each of the first bolt assemblies fixes the adjustment pressure plate to the protective cover through one of the first elongated holes; The lower part of the adjusting pressure plate includes a pair of second elongated holes; each of the second bolt assemblies fixes the adjusting pressure plate to the stator through one of the second elongated holes; The extension lines of the pair of first elongated holes and the extension lines of the pair of second elongated holes intersect on the axis of the central hole.

5. The axial flow compressor thrust clearance adjustment device according to claim 3 or 4, characterized in that: The first bolt assembly includes a first bolt and a first pad; the first pad is disposed between the adjustment pressure plate and the protective cover; the rod of the first bolt passes through the adjustment pressure plate and the first pad in sequence, and is connected to the protective cover; The second bolt assembly includes a second bolt and a second pad; the second pad is disposed between the adjustment pressure plate and the stator; the rod of the second bolt passes through the adjustment pressure plate and the second pad in sequence and is connected to the stator.

6. The thrust clearance adjustment device for an axial flow compressor according to claim 1, characterized in that: The connector includes a first end and a second end; The first end is provided with an external thread; the joint is connected to the threaded hole on the end surface of the rotor through the external thread; The second end is provided with an internal thread; the adjusting bolt is connected to the joint through the internal thread.

7. The axial flow compressor thrust clearance adjustment device according to claim 6, characterized in that: There are multiple connectors, and the external thread specifications of the multiple connectors are different.

8. The thrust clearance adjustment device for an axial flow compressor according to claim 1, characterized in that: The adjusting bolt comprises a rod, a head and a connecting portion; the head and the connecting portion are respectively arranged at two ends of the rod; The rod portion is provided with an external thread; the first nut and the second nut are arranged on the rod portion and are connected with the rod portion through the external thread; The connecting portion is connected to the joint by threaded fitting; The head is prismatic.

9. The thrust clearance adjustment device for an axial flow compressor according to claim 8, characterized in that: The rod portion, the head portion and the connecting portion are integrally formed.

10. A method for measuring thrust clearance of an axial flow compressor, using the thrust clearance adjustment device for an axial flow compressor according to any one of claims 1 to 9, characterized in that: The measuring method comprises the following steps: The displacement detection device is arranged on the housing, and the detection end of the displacement detection device is directed toward the rotor; Adjusting the first nut and the second nut so that the adjusting bolt moves toward the side where the first nut is located, thereby driving the rotor to move; When the reading of the displacement detection device no longer changes, stop adjusting the first nut and the second nut, and record the reading X1 of the displacement detection device; Reversely adjust the first nut and the second nut to move the adjusting bolt toward the side where the second nut is located, thereby driving the rotor to move in the reverse direction; When the reading of the displacement detection device no longer changes, stop reversely adjusting the first nut and the second nut, and record the reading X2 of the displacement detection device; Obtain thrust clearance B = |X1-X2|.

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