Stationary blade adjusting device based on furnace top pressure control

Abstract

The utility model relates to a static blade adjusting device based on furnace top pressure control. The static blade adjusting device comprises a blade bearing cylinder, a guide ring body, a crank, a sliding block pin shaft, a sliding block, a bearing, a static blade, a servo actuator cylinder, a machine shell, a lug ring, a rocking handle and a seat frame. The fixed blade is connected with the guide ring body through the crank, the sliding block pin shaft and the sliding block in sequence, the servo actuator cylinder is connected with the guide ring body through the lug ring, the rocking handle and the seat frame in sequence, and the servo actuator cylinder and the fixed blade form linkage. Under the thrust effect of power oil, the servo actuator cylinder drives the stationary blade to rotate, the synchronism of stationary blade adjustment is guaranteed, the opening and closing angle of the stationary blade is accurately controlled, and the purpose of controlling the pressure of the furnace top is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of turbine devices, in particular to an adjustable stationary blade device based on controlling furnace top pressure. Background Art

[0002] Blast furnace gas recovery turbine unit (TRT) is a power unit that utilizes the pressure energy and heat energy of blast furnace top gas, a byproduct of blast furnace smelting, to expand the gas through a turbine to do work, convert it into mechanical energy, drive the generator to generate electricity, and recover energy. Its operation premise must ensure that the blast furnace top pressure fluctuates within the allowable range, so as to ensure the normal operation of blast furnace ironmaking. The parameters of the blast furnace fluctuate due to changes in the ironmaking process system. To ensure that the turbine main engine operates in the optimal efficiency area and the blades operate safely, it is necessary to change the flow area by changing the stator opening to adapt to changes in blast furnace parameters; during the startup process, it is necessary to gradually open the stator blades to increase the rotor speed to achieve the grid-connected working speed. Therefore, it is very important to adjust the turbine stator opening.

[0003] The stator blade adjustment mechanism used in the existing blast furnace gas residual pressure turbine has structure one: circumferential adjustment. The adjustment device is arranged on the upper and lower casings, forming an angle with the center dividing plane. The stator blade adjustment servo system pulls or pushes the adjustment mechanism at the same time to rotate, so that the stator blades rotate to achieve the purpose of adjustment. Since the positioning window for installing the adjustment mechanism forms an angle with the center dividing plane, the stator needs to be placed on its side during processing, which poses a safety hazard. Structure two: axial adjustment. The adjustment device is arranged on both sides of the lower casing. The stator blade adjustment servo system is axially displaced, driving the adjustment cylinder to move axially through the crank and slider to rotate, so that the stator blades rotate to achieve the purpose of adjustment. Since the adjustment mechanism drives the axial movement of the adjustment cylinder through the connecting plates and guide rod mechanisms on both sides of the casing, and the stator blades are adjusted through the crank slider structure, there is a phenomenon of asynchronism on both sides. Utility Model Content

[0004] In order to overcome the shortcomings of potential safety hazards and asynchronism between the two sides in the processing of a stationary blade adjusting mechanism, the utility model proposes a stationary blade adjusting device based on controlling the furnace top pressure.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A stationary blade regulating device based on controlling furnace top pressure comprises a blade bearing cylinder, a guide ring body, a crank, a slider pin, a slider mechanism, a bearing, a stationary blade, a servo actuator, a casing, an earring, a crank handle and a seat frame.

[0007] The stationary blade and the bearing are installed on the blade bearing cylinder, the stationary blade can rotate in the bearing, the stationary blade is connected to the guide ring body through the crank, the slider pin, and the slider mechanism in sequence, the guide ring body is connected to the servo actuator cylinder, the guide ring body is connected to the casing, and the guide ring body can rotate in the casing. The servo actuator cylinder is installed on the casing, and the servo actuator cylinder is connected to the guide ring body through the earring, the crank handle, and the seat frame in sequence.

[0008] The above-mentioned stationary blade adjustment device may include multiple groups of roller assemblies, and the roller assemblies include roller pins, rollers, and self-lubricating materials.

[0009] The roller is installed on the guide ring body through the roller pin shaft, and the end surface of the roller is installed with a self-lubricating material, which is in contact with the casing.

[0010] In the above-mentioned stationary blade adjustment device, the roller is installed in a rectangular groove on the outer circle of the guide ring body, the guide ring body can rotate in the casing, and the guide ring body and the casing form rolling friction through the roller pin, roller, and self-lubricating material; the guide ring body and the casing form sliding friction through the self-lubricating material.

[0011] In the above-mentioned stationary blade adjustment device, the servo actuator drives the guide ring body to rotate around the axis, and the guide ring body drives the slider, the slider pin, the crank, and the stationary blade to move in turn, and the servo actuator cylinder and the stationary blade form a linkage.

[0012] In the above-mentioned stationary blade adjustment device, the servo actuator is installed under the square box at the center dividing surface on the left and right sides of the casing, and is connected to the two sides of the guide ring body through earrings, crank handles, and seat frames. When the left servo actuator pushes, the right servo actuator pulls, or when the left servo actuator pulls, the right servo actuator pushes, forming a torque to drive the guide ring body to rotate in a circle around the axis, thereby ensuring the synchronization of the stationary blade adjustment.

[0013] The beneficial effects of the utility model are:

[0014] A stationary blade adjustment device based on controlling furnace top pressure is a linkage device, in which a guide ring body is connected to a servo actuator cylinder. Under the thrust of power oil, the servo actuator cylinder drives the guide ring body to rotate in a circle around an axis.

[0015] A stator blade adjustment device based on controlling the furnace top pressure is installed below the square box at the center dividing surface on the left and right sides of the casing through a servo actuator, and is connected to the two sides of the guide ring body through earrings, a crank handle, and a seat frame. When the left servo actuator pushes (pulls), the right side pulls (pushes), forming a torque that drives the connecting bolts to rotate the synthetic guide ring body in a circle around the axis, thereby ensuring the synchronization of the stator blade adjustment.

[0016] A stator blade adjustment device based on controlling furnace top pressure adopts a roller on the outer circle of the guide ring body installed in the rectangular groove of the guide ring body through a roller pin shaft. The roller converts sliding friction into rolling friction along the circumferential direction of the casing, so that the circumferential resistance between the guide ring body and the casing is reduced during the adjustment process; self-lubricating bearings are installed on both end surfaces to reduce the circumferential resistance between the two end surfaces of the guide ring body and the casing during the adjustment process, so that the flexibility of stator blade angle adjustment is improved and it is not easy to get stuck.

[0017] A stator blade adjustment device based on controlling furnace top pressure, which achieves the purpose of controlling furnace top pressure by accurately controlling the opening and closing angles of the stator blades by matching the distance from the center of the frame to the axis, the radial distance from the center of the slider to the axis, and the distance from the pin hole on the crank to the center of the stator blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of the stationary blade and guide ring body of the utility model device along the central axis;

[0019] Figure 2 This is a cross-sectional view of the installation portion of the servo actuator of the utility model device;

[0020] Figure 3 It is a cross-sectional view of the installation structure of the utility model device.

[0021] In the figure: 1. bearing cylinder; 2. guide ring body; 3. crank; 4. slider pin; 5. slider mechanism; 6. bearing; 7. stationary blade; 8. servo actuator; 9. casing; 10. earring; 11. crank handle; 12. seat frame; 13. roller pin; 14. roller; 15. self-lubricating material. DETAILED DESCRIPTION

[0022] Example 1

[0023] A stationary blade adjustment device based on controlling the furnace top pressure, such as Figure 2 , 3As shown, it includes: the servo actuator 8 is installed under the square box at the middle dividing surface on the left and right sides of the casing 9, and is connected to the two sides of the guide ring body 2 through the earrings 10, the crank 11, and the seat frame 12. When the left servo actuator pushes (pulls) under the thrust of the hydraulic oil, the right side pulls (pushes), forming a torque to drive the guide ring body to rotate around the axis along the circumference. The roller 14 on the outer circle of the guide ring body 2 is installed in the rectangular groove of the guide ring body 2 through the roller pin 13. The roller 14 slides along the circumferential direction of the casing. The self-lubricating material 15 installed on the two end surfaces of the guide ring body 2 slides with the wall of the casing installation groove; the crank group mechanism composed of the crank 3, the slider pin shaft 4, and the slider mechanism 5 embedded in the groove of the guide ring body 2 is adjusted accordingly with the rotation of the guide ring body 2. The crank group is connected to the stator 7 installed in the stator blade bearing 6. The rotation of the guide ring body 2 is converted into the rotation of the stator blade 7 through the crank 3, the slider pin shaft 4, and the slider mechanism 5, so as to achieve the purpose of adjusting the stator blade opening and controlling the furnace top constant pressure.

[0024] A stationary blade adjustment device based on controlling the furnace top pressure, such as Figure 1 As shown. A guide ring body 2 is arranged outside the blade bearing cylinder 1. The guide ring body 2 is connected to the stationary blade 7 installed on the stationary blade bearing 6 through a crank 3, a slider pin shaft 4, and a slider mechanism 5. The rotation of the guide ring body 2 can be converted into the rotation of the stationary blade 7 through the crank 3, the slider pin shaft 4, and the slider mechanism 5. The guide ring body 2 is connected to the servo actuator 8. When working, the servo actuator 8 drives the guide ring body 2 to rotate along the circumference around the axis, and the crank 3, the slider pin shaft 4, and the slider 5 embedded in the groove of the guide ring body 2 make the stationary blade 7 rotate. Through the change of the stationary blade opening, the purpose of controlling the rotation speed, controlling the gas flow, controlling the turbine output, and controlling the blast furnace top pressure is achieved.

[0025] In the above technical scheme, the automatic control system sends out a command signal, and converts the electrical signal into a hydraulic oil flow in a certain proportion to drive the guide ring body 2 to rotate. The servo actuator 8 is installed under the square box at the center dividing surface on the left and right sides of the casing 9, and is connected to the two sides of the guide ring body through earrings 10, crank handles 11, and seat frames 12. When the left servo actuator pushes (pulls), the right side pulls (pushes), forming a torque to drive the guide ring body 2 to rotate circumferentially around the axis. The roller 14 on the outer circle of the guide ring body 2 is installed in the rectangular groove of the guide ring body 2 through the roller pin 13. The roller 14 converts sliding friction into rolling friction along the circumferential direction of the casing, so that the circumferential resistance between the guide ring body 2 and the casing 9 is reduced during the adjustment process; self-lubricating materials 15 are installed on both end faces to reduce the circumferential resistance between the guide ring body 2 and the casing 9 during the adjustment process, so that the flexibility of the stationary blade angle adjustment is improved and it is not easy to get stuck.

Claims

1. A stationary blade adjustment device based on controlling furnace top pressure, characterized in that: It comprises a blade bearing cylinder (1), a guide ring body (2), a crank (3), a slider pin (4), a slider mechanism (5), a bearing (6), a stationary blade (7), a servo actuator (8), an earring (10), a crank handle (11), and a seat frame (12); The stationary blade (7) and the bearing (6) are mounted on the blade bearing cylinder (1); the stationary blade (7) can rotate in the bearing (6); the stationary blade (7) is connected to the guide ring body (2) through the crank (3), the slider pin (4), and the slider mechanism (5) in sequence; the guide ring body (2) is connected to the servo actuator cylinder (8); the guide ring body (2) is connected to the casing (9); the guide ring body (2) can rotate in the casing (9); the servo actuator cylinder (8) is mounted on the casing (9); the servo actuator cylinder (8) is connected to the guide ring body (2) through the earring (10), the crank handle (11), and the seat frame (12) in sequence.

2. The stationary blade adjustment device based on controlling furnace top pressure according to claim 1 is characterized in that: It also includes a plurality of roller assemblies, wherein the roller assemblies include a roller pin (13), a roller (14), and a self-lubricating material (15); The roller (14) is mounted on the guide ring body (2) via a roller pin (13), and a self-lubricating material (15) is mounted on the end surface of the roller (14), and the self-lubricating material (15) is in contact with the casing (9).

3. The stationary blade adjustment device based on controlling furnace top pressure according to claim 2 is characterized in that: The roller (14) is installed in a rectangular groove on the outer circle of the guide ring body (2). The guide ring body (2) can rotate in the casing (9). The guide ring body (2) and the casing (9) form rolling friction through the roller pin (13) and the roller (14); the guide ring body (2) and the casing (9) form sliding friction through the self-lubricating material (15).

4. The stationary blade adjustment device based on controlling furnace top pressure according to claim 1 is characterized in that: The servo actuator (8) drives the guide ring body (2) to rotate around the axis, and the guide ring body (2) sequentially drives the slider mechanism (5), the slider pin shaft (4), the crank (3), and the stationary blade (7) to move, so that the servo actuator (8) and the stationary blade (7) form a linkage.

5. The stationary blade adjustment device based on controlling furnace top pressure according to claim 1 is characterized in that: The servo actuator (8) is installed below the square box at the center dividing surface on the left and right sides of the casing (9), and is connected to the two sides of the guide ring body (2) through earrings (10), a crank handle (11), and a seat frame (12). When the left servo actuator pushes, the right servo actuator pulls, or when the left servo actuator pulls, the right servo actuator pushes, forming a torque to drive the guide ring body (2) to rotate in a circle around the axis, thereby ensuring the synchronization of the stationary blade adjustment.

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