Grinding device for mounting hole of moving blade of steam turbine

Abstract

The utility model relates to the technical field of turbine blade production, in particular to a turbine moving blade mounting hole polishing device which comprises a workbench, a motor, clamping equipment, a mounting ring and a leveling device, the motor is mounted on the inner side of the top of the workbench, the clamping equipment is mounted at the output end of the motor, and the mounting ring is mounted on the workbench. The mounting ring is mounted at the top of the clamping equipment, the leveling device is mounted on the upper surface of the workbench, the clamping equipment comprises a rotating disc, a circular truncated cone, a supporting rotary knob, a pressure applying rotary knob and a pressing plate, and the rotating disc is fixedly connected with the output end of a motor; the steam turbine power blade mounting hole grinding device is mainly used for effectively fixing a ground steam turbine rotor impeller, the horizontal fixing state of the rotor impeller is guaranteed, a grinding area is in an overhead state, effective contact between grinding equipment and the grinding area is facilitated, and the grinding efficiency is improved. And the polished mounting ring does not need to be overturned to change the polishing area, and the polishing effect can be better guaranteed through one-time polishing.

Description

Technical Field

[0001] This utility model relates to the field of turbine blade manufacturing technology, and in particular to a device for grinding the mounting holes of turbine blades. Background Technology

[0002] The power blades are key components of a steam turbine, and also one of the most delicate and important components. They withstand the combined effects of high temperature, high pressure, huge centrifugal force, steam force, steam excitation force, corrosion and vibration, and water droplet erosion in the wet steam zone under extremely harsh conditions. Their aerodynamic performance, machining geometry, surface roughness, installation clearance, operating conditions, and scaling all affect the efficiency and output of the steam turbine. Their structural design, vibration intensity, and operating mode have a decisive impact on the safety and reliability of the unit.

[0003] With the development of steam turbines, spliced ​​power blades are widely used. The power blades are installed on the surface of the rotor impeller to complete the installation work. The rotor impeller surface has mounting slots that mate with the blade roots. The inner walls of the machined slots are relatively rough and need to be effectively ground to ensure the fit with the blade roots. When the existing grinding device clamps the rotor impeller, its bottom contacts the clamping equipment, resulting in some areas that cannot be ground and need to be flipped. Therefore, it is necessary to clamp the rotor impeller in the air and effectively ensure that the rotor impeller is set horizontally during clamping to facilitate the grinding work. Utility Model Content

[0004] This utility model addresses the deficiencies in the prior art by providing a grinding device for the mounting holes of steam turbine blades.

[0005] This utility model is achieved through the following technical solution:

[0006] A grinding device for mounting holes of turbine blades includes a worktable, a motor, a clamping device, a mounting ring, and a leveling device. The motor is mounted on the inner side of the top of the worktable, the clamping device is mounted on the output end of the motor, the mounting ring is mounted on the top of the clamping device, and the leveling device is mounted on the upper surface of the worktable. The clamping device includes a turntable, a frustum, a support knob, a pressure knob, and a pressure plate. The turntable is fixedly connected to the output end of the motor, the frustum is fixedly disposed in the middle of the upper surface of the turntable, the support knob is threaded to the bottom edge of the turntable, the pressure knob is threaded to the top edge of the frustum, and the pressure plate is sleeved on the outside of the pressure knob.

[0007] In a preferred embodiment of this utility model, the leveling device includes a slide rail, a slider, an adjusting knob, a screw, a mounting base, and rollers. The slide rail is fixedly disposed on the upper surface of the workbench, the slider is locked inside the slide rail, the adjusting knob is movably connected to the inner side of the slider, the screw is movably connected to the inner side of the adjusting knob, the mounting base is fixedly disposed on the top of the screw, and the rollers are movably connected to the inner side of the bottom of the mounting base.

[0008] The leveling device is mainly used to ensure that the rotor impeller is installed horizontally, thereby ensuring effective contact between the grinding equipment and the mounting holes on its surface, and thus ensuring the grinding effect.

[0009] In a preferred embodiment of this utility model, a limiting groove is vertically formed on the surface of the screw, a locking block is provided on the inner side of the slider to cooperate with it, the bottom end of the screw passes through the slide rail and extends to the top inner side of the worktable, and the bottom of the slide rail and the upper surface of the worktable are provided with waist-shaped holes that cooperate with the screw.

[0010] The screw can be adjusted up and down to ensure the contact effect between the roller and the top of the mounting ring. The oblong holes on the surface of the worktable and the bottom of the slide rail are mainly to prevent the screw from interfering with the worktable and slide rail when the slider is adjusted.

[0011] In a preferred embodiment of this utility model, the mounting ring is sleeved on the outer side of the top of the frustum, the end of the support knob contacts the bottom of the mounting ring, and the bottom of the pressure plate contacts the upper surface of the mounting ring.

[0012] The support knob mainly provides support at the bottom of the mounting ring, and the horizontal state of the mounting ring can be adjusted by adjusting the support knob. The top pressure plate provides pressure and fixation.

[0013] In a preferred embodiment of this utility model, the bottom of the roller is in contact with the upper surface of the mounting ring.

[0014] The beneficial effects of this utility model are:

[0015] This turbine power blade mounting hole grinding device is mainly used to effectively fix the turbine rotor impeller being ground, ensuring the rotor impeller is horizontally fixed and the grinding area is in an air-filled state. This helps the grinding equipment to make effective contact with the grinding area, eliminating the need to flip the grinding mounting ring to change the grinding area. One-time grinding can better guarantee the grinding effect. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the turbine blade mounting hole grinding device of this utility model.

[0017] Figure 2 This is a schematic diagram of the main structure of the turbine blade mounting hole grinding device of this utility model.

[0018] Figure 3 This is a side view of the turbine blade mounting hole grinding device of this utility model.

[0019] Figure 4 This is a schematic diagram of the clamping device structure of the turbine blade mounting hole grinding device of this utility model;

[0020] Figure 5 This is a schematic diagram of the leveling device structure of the turbine blade mounting hole grinding device of this utility model.

[0021] In the diagram: 1. Workbench; 2. Motor; 3. Clamping equipment; 31. Turntable; 32. Frustum; 33. Support knob; 34. Pressure knob; 35. Pressure plate; 4. Mounting ring; 5. Leveling device; 51. Slide rail; 52. Slider; 53. Adjustment knob; 54. Screw; 55. Mounting base; 56. Roller. Detailed Implementation

[0022] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. The directional terms mentioned in this utility model, such as "up," "down," "front," "back," "left," "right," "top," and "bottom," are only for reference to the accompanying drawings. Therefore, the directional terms used are for the purpose of explaining and understanding this utility model, and not for limiting this utility model.

[0023] like Figure 1-5 The device shown is a grinding device for the mounting holes of turbine blades, including a worktable 1, a motor 2, a clamping device 3, a mounting ring 4, and a leveling device 5. The motor 2 is installed on the inner side of the top of the worktable 1, the clamping device 3 is installed at the output end of the motor 2, the mounting ring 4 is installed on the top of the clamping device 3, and the leveling device 5 is installed on the upper surface of the worktable 1. The clamping device 3 includes a turntable 31, a frustum 32, a support knob 33, a pressure knob 34, and a pressure plate 35. The turntable 31 is fixedly connected to the output end of the motor 2, the frustum 32 is fixedly set in the middle of the upper surface of the turntable 31, the support knob 33 is threaded to the bottom edge of the turntable 31, the pressure knob 34 is threaded to the top edge of the frustum 32, and the pressure plate 35 is sleeved on the outside of the pressure knob 34.

[0024] Specifically, the leveling device 5 includes a slide rail 51, a slider 52, an adjusting knob 53, a screw 54, a mounting base 55, and a roller 56. The slide rail 51 is fixedly mounted on the upper surface of the workbench 1. The slider 52 is locked inside the slide rail 51. The adjusting knob 53 is movably connected to the inner side of the slider 52. The screw 54 is movably connected to the inner side of the adjusting knob 53. The mounting base 55 is fixedly mounted on the top of the screw 54. The roller 56 is movably connected to the inner bottom of the mounting base 55. A limit groove is vertically opened on the surface of the screw 54. A locking block that cooperates with the slider 52 is provided on the inner side of the slider 52. The bottom end of the screw 54 passes through the slide rail 51 and extends to the inner top of the workbench 1. The bottom of the slide rail 51 and the upper surface of the workbench 1 have an oblong hole that cooperates with the screw 54. The mounting ring 4 is sleeved on the outer top of the frustum 32. The end of the support knob 33 contacts the bottom of the mounting ring 4. The bottom of the pressure plate 35 contacts the upper surface of the mounting ring 4. The bottom of the roller 56 contacts the upper surface of the mounting ring 4.

[0025] In this embodiment, the pressure plate 35 is first rotated to position it at the top of the frustum 32 to avoid interference when the mounting ring 4 is clamped. Then, the mounting ring 4, which serves as the rotor impeller, is fitted onto the surface of the frustum 32. Since the fitted mounting ring 4 cannot be guaranteed to be horizontal, the leveling device 5 and the support knob 33 are needed to cooperate to level the mounting ring 4. The slider 52 is slid within the slide rail 51 to adjust the roller 56 to the outer top of the mounting ring 4. Then, the adjusting knob 53 is rotated to lower the screw 54 until the roller 56 is aligned with the mounting ring 4. After surface contact, the motor 2 is started to make the clamping device 3 rotate slowly. The roller 56 applies pressure to the mounting ring 4 and the change in the tilt of the mounting ring 4 is observed. The height of the roller 56 is adjusted until the mounting ring 4 is in a horizontal state. When the adjustment knob 53 is rotated, the height of the screw 54 inside the slider 52 is adjusted. The locking block inside the slider 52 is locked in the limiting groove vertically opened on the surface of the screw 54 to ensure the installation position of the roller 56. At this time, the mounting ring 4 can be kept in a horizontal state by adjusting the bottom support height of the mounting ring 4 through the support knob 33.

[0026] Furthermore, the mounting ring 4 is clamped, and the pressure plate 35 is rotated until it is located on the surface of the mounting ring 4. Then, the pressure knob 34 is rotated to screw it into the inside of the frustum 32, so that the pressure plate 35 applies pressure to the top of the mounting ring 4, and the pressure knob 34 and the support knob 33 clamp and fix the mounting ring 4. The edge grinding area of ​​the mounting ring 4 extends to the outside of the worktable 1 to facilitate grinding. The mounting ring 4 is set in a suspended position to facilitate the contact between the grinding device and the inner wall of the mounting hole groove on the edge of the mounting ring 4, ensuring the grinding effect. The rotation of the motor 2 realizes the switching of the grinding area.

[0027] It should be noted that the parts not covered in this utility model are the same as or can be implemented using existing technology; the various drives in this utility model can be implemented by corresponding power structures such as cylinders, oil cylinders, electric cylinders, and motors in conjunction with connecting rods, guide rods, etc., and are not limited to the structures described in the specification and the drawings.

[0028] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," "set up," "equipped with," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A grinding device for a turbine blade mounting hole, comprising a workbench (1), a motor (2), a clamping device (3), a mounting ring (4) and a leveling device (5), characterized in that: The motor (2) is installed on the inner side of the top of the workbench (1), the clamping device (3) is installed on the output end of the motor (2), the mounting ring (4) is installed on the top of the clamping device (3), and the leveling device (5) is installed on the upper surface of the workbench (1); The clamping device (3) comprises a turntable (31), a round table (32), a support knob (33), a pressure knob (34) and a pressure plate (35); the turntable (31) is fixedly connected to the output end of the motor (2); the round table (32) is fixedly arranged in the middle of the upper surface of the turntable (31); the support knob (33) is threadedly connected to the bottom edge of the turntable (31); the pressure knob (34) is threadedly connected to the top edge of the round table (32); and the pressure plate (35) is sleeved on the outside of the pressure knob (34).

2. The grinding device for the installation hole of a turbine rotor blade according to claim 1, characterized in that: The leveling device (5) comprises a slide rail (51), a slider (52), an adjusting knob (53), a screw rod (54), a mounting seat (55) and a roller (56); the slide rail (51) is fixedly arranged on the upper surface of the workbench (1); the slider (52) is clamped inside the slide rail (51); the adjusting knob (53) is movably connected to the inner side of the slider (52); the screw rod (54) is movably connected to the inner side of the adjusting knob (53); the mounting seat (55) is fixedly arranged on the top of the screw rod (54); and the roller (56) is movably connected to the inner side of the bottom of the mounting seat (55).

3. The grinding device for the installation hole of a turbine rotor blade according to claim 2 is characterized in that: A limit slot is vertically provided on the surface of the screw rod (54), a block cooperating with the screw rod (54) is provided on the inner side of the slider (52), the bottom end of the screw rod (54) passes through the slide rail (51) and extends to the inner side of the top of the workbench (1), and a waist-shaped hole cooperating with the screw rod (54) is provided on the bottom of the slide rail (51) and the upper surface of the workbench (1).

4. The grinding device for the installation hole of a turbine rotor blade according to claim 1, characterized in that: The mounting ring (4) is sleeved on the outside of the top of the truncated cone (32), the end of the supporting knob (33) contacts the bottom of the mounting ring (4), and the bottom of the pressing plate (35) contacts the upper surface of the mounting ring (4).

5. The grinding device for the installation hole of a turbine rotor blade according to claim 2, characterized in that: The bottom of the roller (56) contacts the upper surface of the mounting ring (4).

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