Sealing device and sealing method for rotary air preheater

Abstract

The present invention relates to a sealing device for a rotary air preheater and a sealing method thereof, comprising a frame, a central rotating shaft, a sector plate, a rotor assembly, a hydraulic push rod assembly, a radial partition plate, and a radial sealing plate assembly. The rotor assembly is arranged on the frame, and the sector plate is provided on the frame. A hydraulic push rod assembly is provided in the middle of the rotor assembly, and a plurality of sensors are evenly distributed around the outer arc surface of the rotor assembly. A plurality of radial partition plates are evenly distributed on the rotor assembly, and a radial sealing plate assembly is provided on the radial partition plate. By providing the hydraulic push rod assembly, the radial sealing plate assembly, and the sensor, the present invention can obtain the displacement change value and the angular offset value of the rotor assembly caused by thermal deformation in real time during operation. At the same time, the control system of the air preheater is used to adjust the hydraulic push rod in real time to meet the minimum gap between the radial sealing plate assembly and the sector plate, thereby effectively reducing the high air leakage rate problem caused by thermal deformation of the rotor assembly.

Description

Technical Field

[0001] The present invention belongs to the technical field of air preheater sealing, and in particular relates to a sealing device and a sealing method for a rotary air preheater. Background Art

[0002] Air leakage is a key indicator for rotary air preheaters. Excessively high leakage not only increases fan power consumption but also reduces primary and secondary air temperatures, lowering boiler thermal efficiency. Air leakage in rotary air preheaters is primarily divided into two categories: structural leakage and direct leakage. Structural leakage primarily results from carryover of air from the air preheater rotor during rotation, accounting for approximately 10% of total leakage. Direct leakage includes radial leakage, axial leakage, bypass leakage, and central tube leakage, with radial leakage accounting for the majority of direct leakage. The primary cause of radial leakage is the temperature difference between the hot and cold ends of the hot rotor during air preheater operation. The temperature gradient along the rotor's height causes the hot end to expand radially more than the cold end, resulting in a "mushroom-shaped" deformation. This creates a larger gap between the radial seal and the sector plate, increasing leakage. Currently, attempts to reduce air leakage have focused on designing new radial seals, but existing radial seals are insufficient to address radial leakage caused by rotor thermal deformation. Therefore, a novel sealing device is proposed to mitigate the high air leakage caused by rotor thermal deformation. Summary of the Invention

[0003] In response to the problems existing in the prior art, the present invention provides a sealing device and a sealing method for a rotary air preheater. By arranging a hydraulic push rod assembly at the center of the rotary air preheater, and arranging multiple groups of radial sealing plate assemblies on the radial partition plate on the upper part of the rotor assembly, and arranging multiple vertical sensors and displacement sensors on the outside of the rotor assembly, the displacement change value and the angular offset value of the rotor assembly caused by thermal deformation can be obtained in real time during operation. At the same time, the control system of the air preheater is used to adjust the hydraulic push rod in real time to meet the minimum gap between the rotor radial sealing plate assembly and the fan plate, thereby effectively reducing the high air leakage rate problem caused by thermal deformation of the rotor assembly.

[0004] The technical solution adopted by the present invention is a sealing device for a rotary air preheater, which includes a frame, a central rotating shaft, a fan-shaped plate, a rotor assembly, a hydraulic push rod assembly, a radial partition and a radial sealing plate assembly, wherein the rotor assembly is arranged on the frame, and the fan-shaped plate is provided on the frame, the rotor assembly includes a plurality of rotor chambers arranged around, and the middle of the rotor assembly is provided with the hydraulic push rod assembly, the hydraulic push rod assembly includes an upper hydraulic push rod, a connecting bracket and a lower hydraulic push rod, the upper hydraulic push rods are evenly distributed around the outer arc surface of the upper end of the connecting bracket, and the first end of the upper hydraulic push rod is fixedly connected to the connecting bracket, the second end of the upper hydraulic push rod is fixedly connected to the inner arc surface of the rotor chamber in the rotor assembly, and the lower hydraulic push rods are evenly distributed around the outer arc surface of the lower end of the connecting bracket, the first end of the lower hydraulic push rod is fixedly connected to the connecting bracket, and the second end of the lower hydraulic push rod is fixedly connected to the inner arc surface of the rotor chamber in the rotor assembly; the central rotating shaft is provided on the hydraulic The connecting bracket of the push rod assembly is arranged on the center of the center shaft, and the axis of the central rotating shaft coincides with the axis of the connecting bracket. The outer arc surface of the rotor assembly is evenly distributed with a plurality of displacement sensors and vertical sensors, and the displacement sensor is arranged at the upper end of the outer arc surface of the rotor assembly, and the vertical sensor is arranged at the center of the height direction of the outer arc surface of the rotor assembly. The rotor assembly is evenly distributed with the plurality of radial partitions, and the radial partitions are provided with the radial sealing plate assembly, and the radial sealing plate assembly includes a moving plate, a plurality of leaf springs, A fixed plate and a sealing shaft, and the fixed plate is fixedly connected to the radial partition plate, the lower end of the movable plate and the upper end of the fixed plate are rotatably connected through the sealing shaft, the movable plate is provided with a movable plate support plate, and a plurality of fixed plate support plates are evenly distributed on the fixed plate, the plurality of leaf springs are all distributed between the movable plate and the fixed plate, and the upper end of each leaf spring is fixedly connected to the movable plate support plate, the lower end of the leaf spring is fixedly connected to the fixed plate support plate, and the upper end of the movable plate is in contact with the bottom of the fan-shaped plate.

[0005] Preferably, a movable plate sleeve is provided at the lower end of the movable plate, a fixed plate sleeve is provided at the upper end of the fixed plate, and both the movable plate sleeve and the fixed plate sleeve are sleeved on the sealing shaft.

[0006] A second aspect of the present invention provides a sealing method for a sealing device of a rotary air preheater, comprising the following steps:

[0007] S1. Install the hydraulic push rod assembly, radial sealing plate assembly, displacement sensor and vertical sensor on the rotor assembly respectively;

[0008] S2. Calculating the radial air leakage of the air preheater in an initial state, and transmitting the obtained radial air leakage and various sensor parameters in the initial state to a control system of the air preheater;

[0009] S3, reading the values of the displacement sensor and the vertical sensor in the air preheater under normal operating conditions, thereby obtaining the displacement change value and the angular offset value of the rotor assembly during operation in real time, and calculating the gap area change value caused by thermal deformation of the rotor assembly, thereby obtaining the radial air leakage during the operation of the air preheater;

[0010] S4. Based on reasonable thresholds set in the control system of the air preheater, determine whether the radial air leakage, the displacement change value of the rotor assembly, and the angular offset value during the operation of the air preheater are greater than the set thresholds. If the radial air leakage, the displacement change value of the rotor assembly, and the angular offset value during the operation of the air preheater are greater than the set thresholds, execute step S5. If the radial air leakage, the displacement change value of the rotor assembly, and the angular offset value during the operation of the air preheater are not greater than the set thresholds, the air preheater continues to operate without adjusting the hydraulic push rod assembly of the air preheater.

[0011] S5. Transmitting a control signal to the upper hydraulic push rod and the lower hydraulic push rod in the hydraulic push rod assembly to control the upper hydraulic push rod and the lower hydraulic push rod to offset and lift the rotor assembly, thereby adjusting the radial air leakage of the air preheater.

[0012] Preferably, in step S2, the expression of the radial air leakage is:

[0013]

[0014] Where W is the radial air leakage; K is the leakage coefficient; A is the gap area between the radial sealing plate assembly and the sector plate; ΔP is the pressure difference between the air side and the flue gas side; ρ is the gas density.

[0015] Preferably, in step S2, the sensor parameters in the initial state include displacement sensor data and vertical sensor data of the air preheater and pressure difference data between the air side and the flue gas side of the air preheater in the initial state.

[0016] Preferably, in step S3, the expression for the gap area caused by thermal deformation of the rotor assembly is:

[0017]

[0018] Where c is the thermal deformation correction coefficient of the air preheater; L is the thermal deformation displacement of the rotor assembly; θ is the thermal deformation angle of the rotor assembly; and d is the radial distance of the sector plate.

[0019] Preferably, in step S4, the reasonable threshold values include the axial displacement threshold value, the angular deviation threshold value and the radial air leakage threshold value of the rotor assembly, and the radial air leakage during the operation of the air preheater is greater than the radial air leakage threshold value, or the displacement change value of the rotor assembly is greater than the axial displacement threshold value, or the angular deviation value of the rotor assembly is greater than the angular deviation threshold value, a control signal can be transmitted to the hydraulic push rod assembly to control the hydraulic push rod assembly to perform position offset lifting on the rotor assembly.

[0020] The characteristics and beneficial effects of the present invention are:

[0021] 1. The present invention provides a sealing device and sealing method for a rotary air preheater. By providing a hydraulic push rod assembly, a displacement sensor, a vertical sensor, and a radial sealing plate assembly, the position and angle of the air preheater rotor assembly can be adjusted in real time during operation, thereby eliminating the increase in radial clearance caused by thermal deformation and improving the radial air leakage of the rotary air preheater.

[0022] 2. The present invention provides a sealing device and sealing method for a rotary air preheater. The radial sealing sheet assembly is arranged at the outermost edge of the rotor assembly starting from the center of the rotor assembly, and the strength of the leaf spring in the radial sealing sheet assembly is gradually increased to ensure that during the process of the hydraulic push rod adjusting the thermal deformation of the rotor assembly, the bottom of the sector plate and the radial sealing sheet assembly are tightly fitted. Compared with the failure of traditional radial sealing devices, the radial sealing sheet assembly in the present invention can be reused multiple times and quickly replaced and maintained by simply replacing the leaf spring.

[0023] 3. The present invention provides a sealing device and sealing method for a rotary air preheater. First, information from a displacement sensor and a vertical sensor is collected and fed back to the control system of the air preheater. At the same time, an axial displacement threshold, an angular deviation threshold, and a radial air leakage threshold are set. When any value during operation exceeds the corresponding threshold, the control system transmits a signal to the hydraulic push rod assembly, which controls the hydraulic push rod assembly to offset and lift the rotor assembly, thereby ensuring in real time that the bottom of the sector plate and the radial sealing plate assembly are tightly fitted under thermal deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the connection of the hydraulic push rod assembly in the middle of the rotor assembly of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the hydraulic jack assembly of the present invention;

[0027] Figure 4 It is a schematic structural diagram of the radial sealing sheet assembly of the present invention;

[0028] Figure 5 Schematic diagram of the installation of the radial sealing plate assembly of the present invention on the rotor assembly;

[0029] Figure 6 Schematic diagram of the rotor assembly of the present invention before and after thermal deformation;

[0030] Figure 7 It is a workflow diagram of the sealing method of the present invention.

[0031] Main reference numerals:

[0032] Frame 1; central shaft 2; sector plate 3; rotor assembly 4; rotor chamber 41; hydraulic push rod assembly 5; upper hydraulic push rod 51; connecting bracket 52; lower hydraulic push rod 53; radial partition plate 6; radial sealing plate assembly 7; moving plate 71; moving plate support plate 711; leaf spring 72; fixed plate 73; fixed plate support plate 731; sealing shaft 74; radial sealing plate sleeve 75; fixed plate sleeve 76; displacement sensor 8; vertical sensor 9. DETAILED DESCRIPTION

[0033] To fully describe the technical content, structural features, objectives and effects of the present invention, the following is a detailed description with reference to the accompanying drawings.

[0034] The present invention provides a sealing device for a rotary air preheater, such as Figure 1 As shown, it includes a frame 1, a central rotating shaft 2, a sector plate 3, a rotor assembly 4, a hydraulic push rod assembly 5, a radial partition plate 6 and a radial sealing plate assembly 7.

[0035] like Figure 2 and Figure 3As shown, the rotor assembly 4 is arranged on the frame 1, and the frame 1 is provided with a fan-shaped plate 3, the rotor assembly 4 includes a plurality of rotor chambers 41 arranged around, and a hydraulic push rod assembly 5 is provided in the middle of the rotor assembly 4, the hydraulic push rod assembly 5 includes an upper hydraulic push rod 51, a connecting bracket 52 and a lower hydraulic push rod 53, the upper hydraulic push rod 51 is evenly distributed around the outer arc surface of the upper end of the connecting bracket 52, and the first end of the upper hydraulic push rod 51 is fixedly connected to the connecting bracket 52, the second end of the upper hydraulic push rod 51 is fixedly connected to the inner arc surface of the rotor chamber 41 in the rotor assembly 4, and the lower hydraulic push rod 53 is evenly distributed around the outer arc surface of the lower end of the connecting bracket 52, the first end of the lower hydraulic push rod 53 is fixedly connected to the connecting bracket 52, and the second end of the lower hydraulic push rod 53 is fixedly connected to the inner arc surface of the rotor chamber 41 in the rotor assembly 4, the upper hydraulic push rod 51 and the lower hydraulic push rod 53 are used to support the rotor chamber 41.

[0036] like Figure 4 and Figure 5 As shown, the central rotating shaft 2 is arranged on the connecting bracket 52 of the hydraulic jack assembly 5, which changes the previous method of directly welding the central rotating shaft 2 to the rotor assembly 4 to avoid weld cracking, and the axis of the central rotating shaft 2 coincides with the axis of the connecting bracket 52. A plurality of displacement sensors 8 and vertical sensors 9 are evenly distributed around the outer arc surface of the rotor assembly 4, and the displacement sensor 8 is arranged at the upper end of the outer arc surface of the rotor assembly 4 to detect the displacement change caused by thermal deformation of the rotor assembly 4. The vertical sensor 9 is arranged at the center of the height direction of the outer arc surface of the rotor assembly 4 to detect the angle change caused by thermal deformation of the rotor assembly 4. A plurality of radial partitions 6 are evenly distributed on the rotor assembly 4, and the radial partitions 6 are provided There is a radial sealing plate assembly 7, which includes a moving plate 71, multiple leaf springs 72, a fixed plate 73 and a sealing shaft 74, and the fixed plate 73 is fixedly connected to the radial partition 6, and the lower end of the moving plate 71 is rotatably connected to the upper end of the fixed plate 73 through the sealing shaft 74. A moving plate support plate 711 is provided on the moving plate 71, and a plurality of fixed plate support plates 731 are evenly distributed on the fixed plate 73. Multiple leaf springs 72 are evenly distributed between the moving plate 71 and the fixed plate 73, and the upper end of each leaf spring 72 is fixedly connected to the moving plate support plate 711, the lower end of the leaf spring 72 is fixedly connected to the fixed plate support plate 731, and the upper end of the moving plate 71 is in contact with the bottom of the fan-shaped plate 3.

[0037] In a preferred embodiment, the radial sealing plate assembly 7 is arranged at the outermost edge of the rotor assembly 4 starting from the center of the rotor assembly 4, and the strength of the leaf spring 72 in the radial sealing plate assembly 7 gradually increases. The lower end of the moving plate 71 is provided with a moving plate sleeve 75, and the upper end of the fixed plate 73 is provided with a fixed plate sleeve 76, and the moving plate sleeve 75 and the fixed plate sleeve 76 are both sleeved on the sealing shaft 74.

[0038] A second aspect of the present invention provides a sealing method for a sealing device of a rotary air preheater, such as Figure 6 and Figure 7 As shown, it includes the following steps:

[0039] S1. Install the hydraulic push rod assembly 5, radial sealing plate assembly 7, displacement sensor 8 and vertical sensor 9 on the rotor assembly 4 respectively;

[0040] S2. Calculate the radial air leakage of the air preheater in the initial state, and transmit the obtained radial air leakage W and the sensor parameters in the initial state to the control system of the air preheater;

[0041] S3. Read the values of the displacement sensor 8 and the vertical sensor 9 in the air preheater under normal operating conditions, thereby obtaining the displacement change value L and the angular offset value θ of the rotor assembly 4 during operation in real time, and calculating the change value of the gap area A caused by thermal deformation of the rotor assembly 4, thereby obtaining the radial air leakage during operation of the air preheater;

[0042] S4. Based on reasonable thresholds set in the control system of the air preheater, determine whether the radial air leakage W, the displacement change value L of the rotor assembly 4, and the angular offset value θ during the operation of the air preheater are greater than the set thresholds. If the radial air leakage W, the displacement change value L of the rotor assembly, and the angular offset value θ during the operation of the air preheater are greater than the set thresholds, execute step S5. If the radial air leakage W, the displacement change value L of the rotor assembly 4, and the angular offset value θ during the operation of the air preheater are not greater than the set thresholds, the air preheater continues to operate without adjusting the hydraulic push rod assembly 5 of the air preheater.

[0043] S5, transmitting a control signal to the upper hydraulic push rod 51 and the lower hydraulic push rod 53, controlling the upper hydraulic push rod 51 and the lower hydraulic push rod 53 to offset and lift the rotor assembly 4, thereby adjusting the radial air leakage W of the air preheater.

[0044] In a preferred embodiment, in step S2, the radial air leakage W is expressed as:

[0045]

[0046] Where W is the radial air leakage; K is the leakage coefficient; A is the gap area between the radial sealing plate assembly and the sector plate; ΔP is the pressure difference between the air side and the flue gas side; ρ is the gas density.

[0047] In a preferred embodiment, in step S2, the sensor parameters in the initial state include displacement sensor data and vertical sensor data of the air preheater and pressure difference data between the air side and the flue gas side of the air preheater in the initial state.

[0048] In a preferred embodiment, in step S3, the expression for the clearance area A caused by thermal deformation of the rotor assembly 4 is:

[0049]

[0050] Where c is the thermal deformation correction coefficient of the air preheater; L is the thermal deformation displacement of the rotor assembly; θ is the thermal deformation angle of the rotor assembly; and d is the radial distance of the sector plate.

[0051] In a preferred embodiment, in step S4, reasonable thresholds include the axial displacement threshold, the angular deviation threshold, and the radial leakage threshold of the rotor assembly, and the radial leakage W during the operation of the air preheater is greater than the radial leakage threshold, or the displacement change value L of the rotor assembly 4 is greater than the axial displacement threshold, or the angular deviation value θ of the rotor assembly 4 is greater than the angular deviation threshold, a control signal can be transmitted to the hydraulic push rod assembly 5 to control the hydraulic push rod assembly 5 to lift the rotor assembly 4 by position offset.

[0052] The present invention arranges a hydraulic push rod assembly at the center of the rotary air preheater, arranges multiple groups of radial sealing plate assemblies on the radial partition plate on the upper part of the rotor assembly, and arranges multiple vertical sensors and displacement sensors on the outer side of the rotor assembly. During operation, the displacement change value and angular offset value of the rotor assembly caused by thermal deformation can be obtained in real time. At the same time, the control system of the air preheater is used to adjust the hydraulic push rod in real time to meet the minimum gap between the sector plate and the radial sealing plate assembly, thereby effectively reducing the high air leakage rate problem caused by thermal deformation of the rotor assembly.

[0053] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A sealing device for a rotary air preheater, characterized in that: It includes a frame, a central shaft, a sector plate, a rotor assembly, a hydraulic push rod assembly, a radial partition plate and a radial sealing plate assembly. The rotor assembly is arranged on the frame, and the fan-shaped plate is provided on the frame, the rotor assembly includes a plurality of rotor chambers arranged around, and the hydraulic push rod assembly is provided in the middle of the rotor assembly, the hydraulic push rod assembly includes an upper hydraulic push rod, a connecting bracket and a lower hydraulic push rod, the upper hydraulic push rod is evenly distributed around the outer arc surface of the upper end of the connecting bracket, and the first end of the upper hydraulic push rod is fixedly connected to the connecting bracket, the second end of the upper hydraulic push rod is fixedly connected to the inner arc surface of the rotor chamber in the rotor assembly, and the lower hydraulic push rod is evenly distributed around the outer arc surface of the lower end of the connecting bracket, the first end of the lower hydraulic push rod is fixedly connected to the connecting bracket, and the second end of the lower hydraulic push rod is fixedly connected to the inner arc surface of the rotor chamber in the rotor assembly; The central rotating shaft is arranged on the connecting bracket of the hydraulic jack assembly, and the axis of the central rotating shaft coincides with the axis of the connecting bracket. The outer arc surface of the rotor assembly is evenly surrounded by a plurality of displacement sensors and vertical sensors, and the displacement sensor is arranged at the upper end of the outer arc surface of the rotor assembly, and the vertical sensor is arranged at the center of the height direction of the outer arc surface of the rotor assembly. The rotor assembly is evenly provided with the plurality of radial partitions, and the radial partitions are provided with the radial sealing plate assembly, and the radial sealing plate assembly includes a moving plate, a plurality of A leaf spring, a fixed plate and a sealing shaft, and the fixed plate is fixedly connected to the radial partition plate, the lower end of the movable plate and the upper end of the fixed plate are rotatably connected through the sealing shaft, the movable plate is provided with a movable plate support plate, and a plurality of fixed plate support plates are evenly distributed on the fixed plate, the plurality of leaf springs are all distributed between the movable plate and the fixed plate, and the upper end of each leaf spring is fixedly connected to the movable plate support plate, the lower end of the leaf spring is fixedly connected to the fixed plate support plate, and the upper end of the movable plate is in contact with the bottom of the fan-shaped plate.

2. The sealing device for a rotary air preheater according to claim 1, characterized in that: The lower end of the movable plate is provided with a movable plate shaft sleeve, the upper end of the fixed plate is provided with a fixed plate shaft sleeve, and the movable plate shaft sleeve and the fixed plate shaft sleeve are both sleeved on the sealing rotating shaft.

3. A sealing method for a rotary air preheater sealing device according to any one of claims 1 to 2, characterized in that: It includes the following steps: S1. Install the hydraulic push rod assembly, radial sealing plate assembly, displacement sensor and vertical sensor on the rotor assembly respectively; S2. Calculating the radial air leakage of the air preheater in an initial state, and transmitting the obtained radial air leakage and various sensor parameters in the initial state to a control system of the air preheater; S3, reading the values of the displacement sensor and the vertical sensor in the air preheater under normal operating conditions, thereby obtaining the displacement change value and the angular offset value of the rotor assembly during operation in real time, and calculating the gap area change value caused by thermal deformation of the rotor assembly, thereby obtaining the radial air leakage during the operation of the air preheater; S4. Based on reasonable thresholds set in the control system of the air preheater, determine whether the radial air leakage, the displacement change value of the rotor assembly, and the angular offset value during the operation of the air preheater are greater than the set thresholds. If the radial air leakage, the displacement change value of the rotor assembly, and the angular offset value during the operation of the air preheater are greater than the set thresholds, execute step S5. If the radial air leakage, the displacement change value of the rotor assembly, and the angular offset value during the operation of the air preheater are not greater than the set thresholds, the air preheater continues to operate without adjusting the hydraulic push rod assembly of the air preheater. S5. Transmitting a control signal to the upper hydraulic push rod and the lower hydraulic push rod in the hydraulic push rod assembly to control the upper hydraulic push rod and the lower hydraulic push rod to offset and lift the rotor assembly, thereby adjusting the radial air leakage of the air preheater.

4. The sealing method for a sealing device of a rotary air preheater according to claim 3, characterized in that: In step S2, the radial air leakage is expressed as: Where W is the radial air leakage; K is the leakage coefficient; A is the gap area between the radial sealing plate assembly and the sector plate; ΔP is the pressure difference between the air side and the flue gas side; ρ is the gas density.

5. The sealing method for a sealing device of a rotary air preheater according to claim 4, characterized in that: In step S2, the sensor parameters in the initial state include displacement sensor data and vertical sensor data of the air preheater and pressure difference data between the air side and the flue gas side of the air preheater in the initial state.

6. The sealing method for a sealing device of a rotary air preheater according to claim 5, characterized in that: In step S3, the gap area expression caused by thermal deformation of the rotor assembly is: Where c is the thermal deformation correction coefficient of the air preheater; L is the thermal deformation displacement of the rotor assembly; θ is the thermal deformation angle of the rotor assembly; and d is the radial distance of the sector plate.

7. The sealing method for a sealing device of a rotary air preheater according to claim 6, characterized in that: In step S4, the reasonable threshold values include the axial displacement threshold value, the angular deviation threshold value, and the radial air leakage threshold value of the rotor assembly, and the radial air leakage during the operation of the air preheater is greater than the radial air leakage threshold value, or the displacement change value of the rotor assembly is greater than the axial displacement threshold value, or the angular deviation value of the rotor assembly is greater than the angular deviation threshold value, a control signal can be transmitted to the hydraulic push rod assembly to control the hydraulic push rod assembly to perform position offset lifting on the rotor assembly.

Images