Finish machining equipment and method for steam turbine rotor made of ultra-pure material

Abstract

The invention relates to the technical field of steam turbine rotors, in particular to finish machining equipment and method for a steam turbine rotor made of an ultra-pure material, the finish machining equipment comprises a bottom plate, the top of the bottom plate is fixedly connected with connecting equipment, one side of the connecting equipment is provided with a rotor assembly, and the other end of a fixing disc is movably connected with a fixing base. According to the finish machining equipment and method for the steam turbine rotor made of the ultra-pure material, after machining is completed, no defect display with the length larger than 1.5 mm exists on the outer circle surface of the rotor body, meanwhile, when the distance between two defects on the same generatrix is smaller than five times of the length of the larger defect, treatment is conducted according to a continuous defect, and when the rotor body is finally inspected, the defect display is completed. Except for the bearing part, the defect larger than 1.5 mm is found on other parts allowed to be ground, local grinding and polishing can be carried out, the polishing depth does not exceed 1.6 mm, smooth transition between the polishing depth and the peripheral surface should be achieved, the polishing device is used for reasonably polishing and grinding a workpiece, and the ground workpiece can be normally used.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine rotors, and in particular to a finishing device and method for a steam turbine rotor made of ultra-pure material. Background Art

[0002] A steam turbine is a rotary power machine that converts the energy of steam into mechanical work. It has the advantages of high power, high efficiency, and smooth operation. It is widely used in power generation, ship power, industrial drive and other fields. When working, high-temperature and high-pressure steam enters the steam turbine and drives the blades to rotate through impulse or reaction, thereby driving the shaft to rotate and output mechanical energy.

[0003] The processing of turbine rotors made of ultra-pure materials requires not only advanced processing equipment, but also strict processing techniques and technologies. For example, parameters such as temperature and force must be controlled during the processing to avoid damage to the ultra-pure materials.

[0004] During the finishing process of ultra-pure material turbine rotors, ultra-pure materials are usually sensitive to factors such as heat and force during the processing. Excessive heat may cause changes in material properties, and excessive cutting force may cause microstructural damage. At the same time, in order to reduce wear and energy loss during operation, the rotor surface must achieve extremely high smoothness and flatness. Any tiny defects or uneven roughness may affect performance. For this reason, we propose a finishing equipment for pure material turbine rotors. After the processing is completed, the outer circular surface of the rotor body does not have any defects greater than 1.5mm in length. Summary of the invention

[0005] The object of the present invention is to provide a finishing device and method for a turbine rotor made of ultra-pure material, so as to solve the problem mentioned in the above background technology that ultra-pure materials are usually sensitive to factors such as heat and force during the processing process, excessive heat may cause changes in material properties, and excessive cutting force may cause microstructural damage. At the same time, in order to reduce wear and energy loss during operation, the rotor surface must achieve extremely high smoothness and flatness, and any tiny defects or uneven roughness may affect the performance. To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a finishing equipment and method for a steam turbine rotor made of ultra-pure material, comprising a base plate, a connecting device is fixedly connected to the top of the base plate, a rotor assembly is arranged on one side of the connecting device, the rotor assembly comprises a flange, a rotating shaft is fixedly connected to one side of the flange, a plurality of curved toothed discs are sleeved on the side surface of the rotating shaft, a bearing is movably connected to one side of the curved toothed disc, the bearing is sleeved on the side surface of the rotating shaft, the other end of the bearing is fixedly connected to a limiting circular block, one end of the limiting circular block is fixedly connected to the connecting shaft, the other end of the connecting shaft is fixedly connected to a fixed disk, and the other end of the fixed disk is movably connected to a fixed base. First, when using the finishing equipment for the steam turbine rotor, it is necessary to place the workpiece to be polished in a suitable position, and control the movement of the base plate by a numerical control system. , the connecting equipment drives the rotating shaft to drive the workpiece to rotate, and the tool holder moves longitudinally and transversely along the guide rail of the bed. The CNC system accurately controls the relative motion trajectory and speed of the tool and the workpiece according to the pre-set program, thereby realizing the turning of the rotor to achieve the required shape and dimensional accuracy. After the machining is completed, there will be no defects greater than 1.5mm on the outer surface of the rotor body. At the same time, when the distance between two defects on the same busbar is less than five times the length of the larger defect, it is treated as a continuous defect. When the rotor body is finally inspected, except for the bearing part, defects greater than 1.5mm are found in other parts where grinding is allowed. Local grinding and polishing can be performed. The polishing depth should not exceed 1.6mm and should have a smooth transition with the surrounding surface. It is used to reasonably polish and grind the workpiece so that the polished workpiece can be used normally.

[0006] Further preferably, the other end of the fixed base is fixedly connected to one side of the connecting device, and the curved toothed discs are distributed in a linear array on the side surface of the rotating shaft.

[0007] Further preferably, the curved toothed disc is curved and the teeth on the side surface of the curved toothed disc are convex, and a fixing frame is fixedly connected to the top of the bottom plate.

[0008] Further preferably, a turntable is fixedly connected to one side of the fixed frame, the turntable is annular, and a movable roller is sleeved inside the turntable.

[0009] Further preferably, the movable roller is located inside the fixing frame and one end of the movable roller passes through the fixing frame and is fixedly connected to the other side of the flange.

[0010] Further preferably, a control box is fixedly connected to the top of the base plate, and a plurality of control buttons are fixedly connected to the top of the control box.

[0011] Further preferably, a power source is fixedly connected to one side of the control box, the power source is electrically connected to the control box, and the control box is electrically connected to the control buttons and the connection device respectively.

[0012] Further preferably, a plurality of transverse plates are fixedly connected to one side of the connecting device and are distributed in a linear array, the transverse plates are located at the bottom of the rotor assembly, and the workpiece is a curved gear disc, and the curved gear disc is the main body of the overall workpiece. When the machine is started for grinding processing, the workpiece can be ground into a rotor assembly, and the curved gear disc in the rotor assembly is curved and the teeth on the side surface of the curved gear disc are convex. At the same time, a power supply is fixedly connected to one side of the control box, and the power supply is electrically connected to the control box, and the control box is electrically connected to the control buttons and the connecting device respectively. The steam turbine is controlled as a whole through the control box, and appropriate adjustments are made through the control buttons during use.

[0013] A method for using a finishing device for a steam turbine rotor made of ultra-pure material, comprising the following steps;

[0014] S1: First, when using the finishing equipment for the steam turbine rotor, the workpiece to be polished needs to be placed in a suitable position, the movement of the base plate is controlled by the numerical control system, the connecting device drives the rotating shaft to drive the workpiece to rotate, and the tool holder moves longitudinally and transversely along the guide rails of the bed. The numerical control system accurately controls the relative movement trajectory and speed of the tool and the workpiece according to the pre-set program, so as to realize the turning of the rotor to achieve the required shape and size accuracy. At the same time, the workpiece is a curved toothed disc, and the curved toothed disc is the main body of the whole workpiece. When the machine is started for polishing, the workpiece can be polished into a rotor assembly. At the same time, the curved toothed disc in the rotor assembly is curved and the teeth on the side surface of the curved toothed disc are convex;

[0015] S2: At the same time, a power supply is fixedly connected to one side of the control box, the power supply is electrically connected to the control box, and the control box is electrically connected to the control buttons and the connection equipment respectively. The steam turbine is controlled as a whole through the control box, and appropriate adjustments are made through the control buttons during use;

[0016] S3: After machining, no defects greater than 1.5mm in length are allowed on the outer surface of the rotor body. When the distance between two defects on the same busbar is less than five times the length of the larger defect, it shall be treated as a continuous defect. During the final inspection of the rotor body, except for the bearing part, if defects greater than 1.5mm are found in other parts where grinding is allowed, local grinding and polishing are allowed. The polishing depth should not exceed 1.6mm and should have a smooth transition with the surrounding surface.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the present invention, first, when using the finishing equipment of the steam turbine rotor, it is necessary to place the workpiece to be polished in a suitable position, control the movement of the base plate through the numerical control system, connect the equipment to drive the rotating shaft to drive the workpiece to rotate, and at the same time, the tool holder moves longitudinally and transversely along the guide rail of the bed. The numerical control system accurately controls the relative movement trajectory and speed of the tool and the workpiece according to the pre-set program, thereby realizing the turning of the rotor to achieve the required shape and dimensional accuracy. After the machining is completed, there will be no defects greater than 1.5 mm in length on the outer circular surface of the rotor body. At the same time, when the distance between two defects on the same busbar is less than five times the length of the larger defect, it is treated as a continuous defect. When the rotor body is finally inspected, except for the bearing part, defects greater than 1.5 mm are found in other parts where polishing is allowed. Local grinding and polishing can be performed. The polishing depth should not exceed 1.6 mm and should have a smooth transition with the surrounding surface. It is used to reasonably polish and grind the workpiece so that the polished workpiece can be used normally.

[0019] In the present invention, the workpiece is a curved toothed disc, and the curved toothed disc is the main body of the whole workpiece. When the machine is started for grinding processing, the workpiece can be ground into a rotor assembly. At the same time, the curved toothed disc in the rotor assembly is curved and the teeth on the side surface of the curved toothed disc are convex. At the same time, a power supply is fixedly connected to one side of the control box, and the power supply is electrically connected to the control box. The control box is electrically connected to the control buttons and the connecting equipment respectively. The steam turbine is controlled as a whole through the control box, and appropriate adjustments are made through the control buttons during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional main structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall explosion structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the present invention;

[0023] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0024] Figure 5 It is a schematic diagram of the overall three-dimensional structure of the rotor assembly of the present invention;

[0025] Figure 6 It is a schematic diagram of the exploded three-dimensional structure of the rotor assembly of the present invention.

[0026] In the figure: 1, bottom plate; 2, rotor assembly; 3, connecting device; 4, fixed frame; 5, turntable; 6, movable roller; 7, control box; 8, control button; 9, power supply; 10, cross plate; 201, flange; 202, rotating shaft; 203, curved gear plate; 204, bearing; 205, limit circle; 206, connecting shaft; 207, fixed plate; 208, fixed base. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 6 The present invention provides a technical solution: a finishing device for a steam turbine rotor made of ultra-pure material, comprising a bottom plate 1, a connecting device 3 is fixedly connected to the top of the bottom plate 1, a rotor assembly 2 is arranged on one side of the connecting device 3, the rotor assembly 2 comprises a flange 201, a rotating shaft 202 is fixedly connected to one side of the flange 201, a plurality of curved toothed discs 203 are sleeved on the side surface of the rotating shaft 202, a bearing 204 is movably connected to one side of the curved toothed disc 203, the bearing 204 is sleeved on the side surface of the rotating shaft 202, the other end of the bearing 204 is fixedly connected to a limiting circular block 205, and one end of the limiting circular block 205 is fixedly connected to the connecting shaft 206. The other end of the connecting shaft 206 is fixedly connected to a fixed plate 207, and the other end of the fixed plate 207 is movably connected to a fixed base 208. After machining is completed, no defects greater than 1.5 mm in length are allowed to be displayed on the outer surface of the rotor body. At the same time, when the distance between two defects on the same busbar is less than five times the length of the larger defect, it is treated as a continuous defect. During the final inspection of the rotor body, except for the bearing 204, if defects greater than 1.5 mm are found in other parts where grinding is allowed, local grinding and polishing are allowed. The polishing depth should not exceed 1.6 mm and should have a smooth transition with the surrounding surface.

[0029] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the other end of the fixed base 208 is fixedly connected to one side of the connecting device 3, the curved toothed disc 203 is distributed in a linear array on the side surface of the rotating shaft 202, the curved toothed disc 203 is curved and the teeth on the side surface of the curved toothed disc 203 are convex, the top of the bottom plate 1 is fixedly connected to a fixed frame 4, one side of the fixed frame 4 is fixedly connected to a turntable 5, the turntable 5 is annular, and the inside of the turntable 5 is sleeved with a movable roller 6. First, when using the finishing equipment of the turbine rotor, it is necessary to place the workpiece to be polished in a suitable position, control the movement of the bottom plate 1 through the numerical control system, and connect the device 3. The driving rotating shaft 202 drives the workpiece to rotate, and the tool holder moves longitudinally and transversely along the guide rails of the bed. The CNC system accurately controls the relative motion trajectory and speed between the tool and the workpiece according to the pre-set program, thereby realizing the turning of the rotor to achieve the required shape and dimensional accuracy. At the same time, the workpiece is a curved toothed disc 203, and the curved toothed disc 203 is the main body of the entire workpiece. When the machine is started for grinding processing, the workpiece can be ground into a rotor assembly 2. At the same time, the curved toothed disc 203 in the rotor assembly 2 is curved and the teeth on the side surface of the curved toothed disc 203 are convex.

[0030] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the movable roller 6 is located inside the fixed frame 4 and one end of the movable roller 6 passes through the fixed frame 4 and is fixedly connected to the other side of the flange 201, a control box 7 is fixedly connected to the top of the base plate 1, a plurality of control buttons 8 are fixedly connected to the top of the control box 7, a power supply 9 is fixedly connected to one side of the control box 7, the power supply 9 is electrically connected to the control box 7, the control box 7 is electrically connected to the control buttons 8 and the connecting device 3 respectively, a plurality of cross plates 10 are fixedly connected to one side of the connecting device 3 and the cross plates 10 are distributed in a linear array, and the cross plates 10 are located at the bottom of the rotor assembly 2.

[0031] A method for using a finishing device for a steam turbine rotor made of ultra-pure material, comprising the following steps;

[0032] S1: First, when using the finishing equipment for the steam turbine rotor, it is necessary to place the workpiece to be polished in a suitable position, control the movement of the base plate 1 through the numerical control system, and drive the rotating shaft 202 of the connecting device 3 to drive the workpiece to rotate. At the same time, the tool holder moves longitudinally and transversely along the guide rails of the bed. The numerical control system accurately controls the relative movement trajectory and speed of the tool and the workpiece according to the pre-set program, so as to realize the turning of the rotor to achieve the required shape and size accuracy. At the same time, the workpiece is a curved toothed disc 203, and the curved toothed disc 203 is the main body of the whole workpiece. When the machine is started for polishing, the workpiece can be polished into a rotor assembly 2, and the curved toothed disc 203 in the rotor assembly 2 is curved and the teeth on the side surface of the curved toothed disc 203 are convex;

[0033] S2: At the same time, a power source 9 is fixedly connected to one side of the control box 7, the power source 9 is electrically connected to the control box 7, and the control box 7 is electrically connected to the control button 8 and the connection device 3 respectively, and the steam turbine is controlled as a whole through the control box 7, and appropriate adjustments are made through the control button 8 during use;

[0034] S3: After machining is completed, no defects greater than 1.5mm in length are allowed on the outer surface of the rotor body. When the distance between two defects on the same busbar is less than five times the length of the larger defect, it will be treated as a continuous defect. During the final inspection of the rotor body, except for the bearing 204, if defects greater than 1.5mm are found in other parts where grinding is allowed, local grinding and polishing are allowed. The polishing depth should not exceed 1.6mm and should have a smooth transition with the surrounding surface.

[0035] The use method and advantages of the present invention: The ultra-pure material steam turbine rotor finishing equipment and method, when used, the working process is as follows:

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, first, when using the finishing equipment for the steam turbine rotor, it is necessary to place the workpiece to be polished in a suitable position, control the movement of the base plate 1 through the numerical control system, and drive the rotating shaft 202 to drive the workpiece to rotate through the connecting device 3. At the same time, the tool holder moves longitudinally and transversely along the guide rails of the bed. The numerical control system accurately controls the relative movement trajectory and speed of the tool and the workpiece according to the pre-set program, thereby realizing the turning of the rotor to achieve the required shape and size accuracy. At the same time, the workpiece is a curved toothed disc 203, and the curved toothed disc 203 is the main body of the whole workpiece. When the machine is started for polishing, the workpiece can be polished into a rotor assembly 2. At the same time, the curved toothed disc 203 in the rotor assembly 2 is curved and the teeth on the side surface of the curved toothed disc 203 are convex. After the machining is completed, no defects greater than 1.5mm in length are allowed to be displayed on the outer surface of the rotor body. At the same time, when the distance between two defects on the same busbar is less than five times the length of the larger defect, it is treated as a continuous defect. During the final inspection of the rotor body, except for the bearing 204, if defects greater than 1.5mm are found in other parts that are allowed to be polished, local grinding and polishing are allowed. The polishing depth should not exceed 1.6mm and should have a smooth transition with the surrounding surface. At the same time, a power supply 9 is fixedly connected to one side of the control box 7, and the power supply 9 is electrically connected to the control box 7. The control box 7 is electrically connected to the control button 8 and the connection device 3 respectively. The steam turbine is controlled as a whole through the control box 7, and appropriate adjustments are made through the control button 8 during use.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A finishing device for a steam turbine rotor made of ultra-pure material, comprising a base plate (1), characterized in that: A connection device (3) is fixedly connected to the top of the bottom plate (1), a rotor assembly (2) is arranged on one side of the connection device (3), and the rotor assembly (2) comprises a flange (201), a rotating shaft (202) is fixedly connected to one side of the flange (201), a plurality of curved toothed discs (203) are sleeved on the side surface of the rotating shaft (202), a bearing (204) is movably connected to one side of the curved toothed disc (203), the bearing (204) is sleeved on the side surface of the rotating shaft (202), the other end of the bearing (204) is fixedly connected to a limiting circular block (205), one end of the limiting circular block (205) is fixedly connected to a connecting shaft (206), the other end of the connecting shaft (206) is fixedly connected to a fixed disc (207), and the other end of the fixed disc (207) is movably connected to a fixed base (208).

2. The ultra-pure material steam turbine rotor finishing equipment according to claim 1, characterized in that: The other end of the fixed base (208) is fixedly connected to one side of the connecting device (3), and the curved toothed discs (203) are distributed in a linear array on the side surface of the rotating shaft (202).

3. The finishing equipment for a steam turbine rotor made of ultra-pure material according to claim 1, characterized in that: The curved toothed disc (203) is curved and the teeth on the side surface of the curved toothed disc (203) are convex, and the top of the bottom plate (1) is fixedly connected to a fixing frame (4).

4. The finishing equipment for a steam turbine rotor made of ultra-pure material according to claim 3 is characterized by: A rotating disk (5) is fixedly connected to one side of the fixed frame (4); the rotating disk (5) is annular in shape; and a movable roller (6) is sleeved inside the rotating disk (5).

5. The ultra-pure material steam turbine rotor finishing equipment according to claim 4, characterized in that: The movable roller (6) is located inside the fixed frame (4), and one end of the movable roller (6) passes through the fixed frame (4) and is fixedly connected to the other side of the flange (201).

6. The ultra-pure material steam turbine rotor finishing equipment according to claim 5, characterized in that: A control box (7) is fixedly connected to the top of the base plate (1), and a plurality of control buttons (8) are fixedly connected to the top of the control box (7).

7. The ultra-pure material steam turbine rotor finishing equipment according to claim 5, characterized in that: A power source (9) is fixedly connected to one side of the control box (7), the power source (9) is electrically connected to the control box (7), and the control box (7) is electrically connected to the control button (8) and the connection device (3) respectively.

8. The ultra-pure material steam turbine rotor finishing equipment according to claim 5, characterized in that: A plurality of transverse plates (10) are fixedly connected to one side of the connection device (3), and the transverse plates (10) are distributed in a linear array. The transverse plates (10) are located at the bottom of the rotor assembly (2).

9. A method for using a finishing device for a steam turbine rotor made of ultra-pure material, characterized in that: The steps include: S1: First, when using the finishing equipment for the steam turbine rotor, the workpiece to be polished needs to be placed in a suitable position, the movement of the base plate (1) is controlled by the numerical control system, the connecting device (3) drives the rotating shaft (202) to drive the workpiece to rotate, and the tool holder moves longitudinally and transversely along the guide rails of the bed. The numerical control system accurately controls the relative movement trajectory and speed of the tool and the workpiece according to a pre-set program, thereby realizing the turning of the rotor to achieve the required shape and size accuracy. At the same time, the workpiece is a curved toothed disc (203), and the curved toothed disc (203) is the main body of the whole workpiece. When the machine is started to perform the polishing process, the workpiece can be polished into a rotor assembly (2), and the curved toothed disc (203) in the rotor assembly (2) is curved and the teeth on the side surface of the curved toothed disc (203) are convex; S2: At the same time, a power source (9) is fixedly connected to one side of the control box (7), the power source (9) is electrically connected to the control box (7), and the control box (7) is electrically connected to the control button (8) and the connection device (3) respectively, and the steam turbine is controlled as a whole through the control box (7), and appropriate adjustments are made through the control button (8) during use; S3: After machining, no defects greater than 1.5 mm in length are allowed on the outer surface of the rotor body. When the distance between two defects on the same busbar is less than five times the length of the larger defect, it shall be treated as a continuous defect. During the final inspection of the rotor body, except for the bearing (204), if defects greater than 1.5 mm are found in other parts that are allowed to be polished, local grinding and polishing are allowed. The polishing depth should not exceed 1.6 mm and should have a smooth transition with the surrounding surface.

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