A polishing tool for an oversize rotor end face

Abstract

The utility model discloses a kind of polishing frock of super large rotor end face, it is related to end face polishing technical field, including rotor shield ring, the bottom bracket body is equipped in the lower rotor shield ring, fixed mounting is equipped with side bracket body on the bottom bracket body, connecting piece is installed on the side bracket body and the bottom bracket body, polishing mechanism is installed on the side bracket body, the polishing mechanism includes fixed mounting on the hydraulic oil cylinder of side bracket body, the output end of the hydraulic oil cylinder is connected with positioning bracket body, fixed mounting is equipped with servo turntable in the middle position of positioning bracket body, the output end fixed mounting of servo turntable has rotary arm, dust prevention mechanism is installed in the rotor shield ring, sliding block is slidably installed in the end of rotary arm, locking screw is fixedly installed on the sliding block with screw thread. The polishing frock of this super large rotor end face, polishing mechanism can polish the rotor shield ring of different diameters, dust prevention mechanism can prevent debris into rotor shield ring.

Description

Technical Field

[0001] This utility model relates to the field of end face grinding technology, specifically a grinding fixture for the end face of an ultra-large rotor. Background Technology

[0002] Rotor retaining rings are key components of turbine generator or large motor rotors. They are usually forged from high-strength alloy steel and installed at both ends of the rotor to constrain the ends of the rotor windings during high-speed rotation, preventing them from deforming or being thrown out due to centrifugal force.

[0003] In the prior art, patent announcement number CN208596975U discloses a generator rotor retaining ring. The generator rotor retaining ring includes a rotor body and two retaining rings sleeved at both ends of the rotor body. The rotor body has two sets of rotor lower wire slots, each set of rotor lower wire slots being separated by large teeth on the rotor body. The large teeth on the rotor body also have fastening grooves.

[0004] To ensure the end face of the large rotor retainer remains perpendicular to the axis, its features must be finely ground. During grinding, a large amount of debris and grinding powder are generated, and these fine particles can easily enter the internal structure of the rotor retainer. This not only affects the internal cleanliness of the rotor retainer but may also pose a potential threat to its normal operation. Therefore, after grinding, specialized workers need to thoroughly clean the rotor retainer. Workers must use specialized tools and equipment to patiently and meticulously clean every corner of the retainer's interior to ensure all debris and grinding powder are completely removed. This is not only a time-consuming and labor-intensive task but also requires workers to possess certain professional skills and experience to guarantee the quality and efficiency of the cleaning work. Therefore, a grinding fixture for the end face of an ultra-large rotor is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a grinding fixture for the end face of an ultra-large rotor to solve the problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a grinding fixture for an ultra-large rotor end face, including a rotor retaining ring, a base frame below the rotor retaining ring, a side frame fixedly mounted on the base frame, a connecting piece mounted on the side frame and the base frame, a grinding mechanism mounted on the side frame, the grinding mechanism including a hydraulic cylinder fixedly mounted on the side frame, a positioning frame connected to the output end of the hydraulic cylinder, a servo turntable fixedly mounted in the middle of the positioning frame, a rotating arm fixedly mounted at the output end of the servo turntable, and a dust-blocking mechanism installed inside the rotor retaining ring.

[0007] Preferably, a sliding block is slidably mounted at the end of the rotating arm, a locking screw is threadedly fixedly mounted on the sliding block, and a grinder is fixedly mounted on the sliding block.

[0008] Preferably, slide rails are installed on both sides of the rotating arm, and the sliding block is slidably mounted on the rotating arm via the slide rails.

[0009] Preferably, the positioning frame is mounted on one side of the side frame via a hydraulic cylinder, the rotating arm is rotatably mounted on one side of the side frame via a servo turntable, and the grinder is movably mounted at the end of the rotating arm via a sliding block, which is restrained on the rotating arm by a locking screw.

[0010] Preferably, the dust-blocking mechanism includes a dust-blocking circular plate disposed inside the rotor guard ring, a silicone scraper ring and an annular airbag fixedly installed on the outer side of the dust-blocking circular plate, a cylinder fixedly installed in the middle of the dust-blocking circular plate, a threaded sleeve fixedly installed on the cylinder, a piston plate slidably installed inside the cylinder, and an adjusting screw threadedly installed inside the threaded sleeve, with the end of the adjusting screw rotatably mounted on the piston plate.

[0011] Preferably, a connecting pipe is installed inside the dust-blocking circular plate, with one end of the connecting pipe connected to the cylinder body and the other end connected to the annular airbag. An installation groove is provided on the dust-blocking circular plate, and the dust-blocking circular plate is installed on the dust-blocking circular plate through the installation groove.

[0012] Preferably, the adjusting screw is mounted on the cylinder body via a threaded sleeve, and the piston plate is provided with a rotary connector, wherein the end of the adjusting screw is rotatably mounted on the piston plate via the rotary connector.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. In this application, the grinding machine can be started after the dust-blocking circular plate is fixed inside the rotor retaining ring. After the grinding machine is started, the rotating arm is driven to rotate by a servo turntable. During the rotation of the rotating arm, it will drive the grinding machine head to make a circular motion around the rotor retaining ring port, thereby realizing rapid grinding of the rotor retaining ring port. In addition, after loosening the locking screw, the extension length of the sliding block can be adjusted to meet the grinding requirements of rotor retaining rings of different diameters.

[0014] 2. In this application, when the adjusting screw rotates forward, it drives the piston plate to move forward, thereby forcing the gas in the cylinder into the annular airbag. The annular airbag then expands, filling the gap between the dust-blocking disc and the rotor retaining ring to prevent debris generated during grinding from entering the rotor retaining ring. After the grinding operation is completed, the adjusting screw can be rotated in the reverse direction, causing some of the gas in the annular airbag to be drawn into the cylinder, resulting in the dust-blocking disc loosening. Once the dust-blocking disc is loosened, it can be pulled out of the rotor retaining ring. During this process, the silicone scraper ring cleans away the debris accumulated at the port of the rotor retaining ring. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the grinding mechanism of this utility model; Figure 4 This is a schematic diagram of the dust-blocking mechanism of this utility model; Figure 5 This utility model Figure 4 Enlarged view of point A in the middle.

[0016] The markings in the diagram are: 1. Base frame; 2. Connector; 3. Side frame; 4. Rotor retaining ring; 5. Grinding mechanism; 501. Hydraulic cylinder; 502. Positioning frame; 503. Servo turntable; 504. Rotating arm; 505. Locking screw; 506. Sliding block; 507. Grinding machine; 6. Dustproof mechanism; 601. Dustproof circular plate; 602. Silicone scraper ring; 603. Annular airbag; 604. Cylinder body; 605. Threaded sleeve; 606. Adjusting screw; 607. Piston plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1 and Figure 2 As shown, this utility model provides a technical solution for a grinding fixture for an ultra-large rotor end face, including a rotor retaining ring 4, a base frame 1 below the rotor retaining ring 4, a side frame 3 fixedly installed on the base frame 1, a connecting piece 2 installed on the side frame 3 and the base frame 1, a grinding mechanism 5 installed on the side frame 3, and a dust blocking mechanism 6 installed inside the rotor retaining ring 4. The grinding mechanism 5 can grind rotor retaining rings 4 of different diameters, and the dust blocking mechanism 6 can prevent debris from entering the rotor retaining ring 4.

[0019] like Figure 2 and Figure 3As shown, the grinding mechanism 5 includes a hydraulic cylinder 501 fixedly mounted on the side frame 3. The output end of the hydraulic cylinder 501 is connected to a positioning frame 502. A servo turntable 503 is fixedly mounted in the middle of the positioning frame 502. A rotating arm 504 is fixedly mounted at the output end of the servo turntable 503. A sliding block 506 is slidably mounted at the end of the rotating arm 504. A locking screw 505 is threadedly fixedly mounted on the sliding block 506. A grinding machine 507 is fixedly mounted on the sliding block 506. Slide rails are installed on both sides of the rotating arm 504. The sliding block 506 is slidably mounted on the rotating arm 504 through the slide rails.

[0020] Specifically, after fixing the dust-blocking circular plate 601 inside the rotor retaining ring 4, the grinder 507 can be started. Once started, the grinder 507 can drive the rotating arm 504 to rotate via the servo turntable 503. During the rotation of the rotating arm 504, it causes the head of the grinder 507 to rotate around the port of the rotor retaining ring 4, thereby quickly grinding the port of the rotor retaining ring 4. Furthermore, after loosening the locking screw 505, the extension length of the sliding block 506 can be adjusted to grind rotor retaining rings 4 of different diameters.

[0021] like Figure 2 and Figure 4 As shown, the dust-blocking mechanism 6 includes a dust-blocking circular plate 601 disposed inside the rotor guard ring 4. A silicone scraper ring 602 and an annular airbag 603 are fixedly installed on the outer side of the dust-blocking circular plate 601. A cylinder 604 is fixedly installed in the middle of the dust-blocking circular plate 601. A threaded sleeve 605 is fixedly installed on the cylinder 604. A piston plate 607 is slidably installed inside the cylinder 604. An adjusting screw 606 is threadedly installed inside the threaded sleeve 605, and the end of the adjusting screw 606 is rotatably installed on the piston plate 607. A connecting pipe is installed inside the dust-blocking circular plate 601, with one end connected to the cylinder 604 and the other end connected to the annular airbag 603. An installation groove is provided on the dust-blocking circular plate 601, and the dust-blocking circular plate 601 is installed on the dust-blocking circular plate 601 through the installation groove.

[0022] Specifically, after rotating the adjusting screw 606 forward, it will drive the piston plate 607 to move forward, thereby forcing the gas in the cylinder 604 into the annular air bag 603, causing the annular air bag 603 to expand. The expanded annular air bag 603 will fill the gap between the dust-blocking circular plate 601 and the rotor retaining ring 4, preventing the grinding debris from entering the rotor retaining ring 4.

[0023] After polishing, the adjusting screw 606 can be rotated backward to draw some of the gas from the annular airbag 603 into the cylinder 604, loosening the dust-blocking disc 601. Once loosened, the dust-blocking disc 601 can be pulled out of the rotor retaining ring 4. During the extraction of the dust-blocking disc 601, the silicone scraper ring 602 will clean away the debris accumulated at the port of the rotor retaining ring 4.

[0024] Working principle: First, place the dust-blocking disc 601 inside the rotor retaining ring 4. Then, rotate the adjusting screw 606 forward. This rotation drives the piston plate 607 forward, forcing the gas in the cylinder 604 into the annular air bladder 603, causing it to expand and fill the gap between the dust-blocking disc 601 and the rotor retaining ring 4, preventing grinding debris from entering the rotor retaining ring 4. After grinding, rotate the adjusting screw 606 backward to draw some gas from the annular air bladder 603 into the cylinder 604, loosening the dust-blocking disc 601. Once loosened, the dust-blocking disc 601 can be pulled out of the rotor retaining ring 4. During this process, the silicone scraper ring 602 cleans away any accumulated debris at the port of the rotor retaining ring 4. After the dust-blocking circular plate 601 is fixed inside the rotor retaining ring 4, the grinder 507 can be started. After the grinder 507 is started, the rotating arm 504 can be driven to rotate by the servo turntable 503. During the rotation of the rotating arm 504, it will drive the head of the grinder 507 to rotate around the port of the rotor retaining ring 4, thereby quickly grinding the port of the rotor retaining ring 4. After loosening the locking screw 505, the extension length of the sliding block 506 can be adjusted so as to grind rotor retaining rings 4 of different diameters.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A grinding fixture for the end face of an ultra-large rotor, comprising a rotor retaining ring (4), a base frame (1) provided below the rotor retaining ring (4), a side frame (3) fixedly installed on the base frame (1), and a connecting piece (2) installed on the side frame (3) and the base frame (1), characterized in that: A grinding mechanism (5) is installed on the side frame (3). The grinding mechanism (5) includes a hydraulic cylinder (501) fixedly installed on the side frame (3). The output end of the hydraulic cylinder (501) is connected to a positioning frame (502). A servo turntable (503) is fixedly installed in the middle of the positioning frame (502). A rotating arm (504) is fixedly installed at the output end of the servo turntable (503). A dust-blocking mechanism (6) is installed inside the rotor guard ring (4).

2. The grinding fixture for the end face of an ultra-large rotor according to claim 1, characterized in that: A sliding block (506) is slidably mounted on the end of the rotating arm (504), a locking screw (505) is threadedly fixed on the sliding block (506), and a grinder (507) is fixedly mounted on the sliding block (506).

3. The grinding fixture for the end face of an ultra-large rotor according to claim 2, characterized in that: The rotating arm (504) is equipped with slide rails on both sides, and the sliding block (506) is slidably mounted on the rotating arm (504) via the slide rails.

4. The grinding fixture for the end face of an ultra-large rotor according to claim 3, characterized in that: The positioning frame (502) is mounted on one side of the side frame (3) via a hydraulic cylinder (501). The rotating arm (504) is rotatably mounted on one side of the side frame (3) via a servo turntable (503). The grinder (507) is movably mounted at the end of the rotating arm (504) via a sliding block (506). The sliding block (506) is restricted on the rotating arm (504) by a locking screw (505).

5. The grinding fixture for the end face of an ultra-large rotor according to claim 4, characterized in that: The dust-blocking mechanism (6) includes a dust-blocking circular plate (601) disposed inside the rotor guard ring (4). A silicone scraper ring (602) and an annular airbag (603) are fixedly installed on the outer side of the dust-blocking circular plate (601). A cylinder body (604) is fixedly installed in the middle of the dust-blocking circular plate (601). A threaded sleeve (605) is fixedly installed on the cylinder body (604). A piston plate (607) is slidably installed inside the cylinder body (604). An adjusting screw (606) is threadedly installed inside the threaded sleeve (605), and the end of the adjusting screw (606) is rotatably installed on the piston plate (607).

6. The grinding fixture for the end face of an ultra-large rotor according to claim 5, characterized in that: A connecting pipe is installed inside the dust-blocking circular plate (601), with one end of the connecting pipe connected to the cylinder body (604) and the other end connected to the annular airbag (603). An installation groove is provided on the dust-blocking circular plate (601), and the dust-blocking circular plate (601) is installed on the dust-blocking circular plate (601) through the installation groove.

7. The grinding fixture for an ultra-large rotor end face according to claim 6, characterized in that: The adjusting screw (606) is mounted on the cylinder (604) via a threaded sleeve (605), and a rotary connector is provided on the piston plate (607). The end of the adjusting screw (606) is rotatably mounted on the piston plate (607) via the rotary connector.

Images