Grinding and positioning tool for high-speed shaft sealing inner ring

Abstract

The utility model discloses a high-speed shaft sealing inner ring grinding and positioning tool, which belongs to the technical field of sealing inner rings and comprises a pull disc, a mounting disc is arranged on the pull disc, a plurality of elastic inner support parts are slidably connected onto the mounting disc, gap notches are formed among the plurality of elastic inner support parts, and conical shaft mounting parts are slidably connected into the gap notches. A threaded hole is formed in the conical shaft mounting piece, a threaded pull rod is rotated in the threaded hole, and the outer walls of the elastic inner supporting pieces are sleeved with workpieces to be ground, so that clearance fit between the workpieces and the tool can be achieved, the workpieces are not prone to distortion after being ground, taking and placing are convenient, the cylindricity and coaxiality of the workpieces cannot be affected, and the machining efficiency is improved. And the form and location tolerance meets the production requirement.

Description

Technical Field

[0001] The utility model belongs to the technical field of the sealing inner ring, and specifically relates to a grinding positioning tooling for the sealing inner ring of a high-speed shaft. Background Technique

[0002] The labyrinth sealing inner ring of the high-speed shaft is one of the key components in the wind power project, and is used for the sealing and protection of high-speed rotating components. In a wind turbine, the labyrinth sealing inner ring of the high-speed shaft needs to withstand high rotational speeds and complex working conditions, so extremely high requirements are imposed on its machining accuracy. In order to ensure the sealing performance and stability of the inner ring under high-speed rotation, it is necessary to ensure that geometric tolerances such as cylindricity and coaxiality meet strict standards. Through the grinding process, tiny defects on the material surface can be eliminated, high-precision dimensional control can be achieved, enabling the inner ring to meet the sealing requirements under high rotational speeds, and at the same time ensuring its surface finish and geometric accuracy.

[0003] At present, the grinding process of the labyrinth sealing inner ring of the high-speed shaft usually relies on auxiliary tooling for simple positioning and fixing. These auxiliary tooling mainly fix the inner ring on the grinding machine through mechanical jigs or supports, and then use equipment such as external cylindrical grinding machines and centerless grinding machines for external cylindrical grinding. Although these methods can position the workpiece to a certain extent, during the grinding process, an interference fit is often used between the workpiece and the tooling to increase the fixing stability. However, due to the existence of friction and vibration during the grinding process, the interference fit easily causes the workpiece to undergo small displacements under high pressure, increasing the complexity of the grinding operation.

[0004] Although the existing grinding methods can achieve the positioning and machining of the labyrinth sealing inner ring of the high-speed shaft to a certain extent, due to the interference fit between the workpiece and the tooling, the workpiece is prone to distortion after grinding. This distortion not only affects the cylindricity and coaxiality of the workpiece, resulting in geometric tolerances not meeting the production requirements, but also may damage the overall sealing performance of the inner ring. In addition, the additional stress suffered by the workpiece during the grinding process will also reduce the fatigue strength of the material, further affecting the service life of the product. Content of the Utility Model

[0005] The purpose of the utility model is to provide a grinding positioning tooling for the sealing inner ring of a high-speed shaft, which can achieve a clearance fit between the workpiece and the tooling. The workpiece is not easily distorted after grinding, and it is convenient to pick up and place, without affecting the cylindricity and coaxiality of the workpiece, ensuring that the geometric tolerances meet the production requirements, so as to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A high-speed shaft seal inner ring grinding and positioning tool comprises a pulling plate, a mounting plate is arranged on the pulling plate, a plurality of elastic inner support members are slidably connected to the mounting plate, gap slots are formed between the plurality of elastic inner support members, a tapered shaft mounting member is slidably connected in the gap slots, a threaded hole is arranged on the tapered shaft mounting member, a threaded pull rod is rotated in the threaded hole, and workpieces to be ground are sleeved on the outer walls of the plurality of elastic inner support members.

[0008] Further solution: A mounting hole is provided at the bottom of the pulling disc, which is connected to the rotating shaft of the grinder through the mounting hole, thereby ensuring that the pulling disc is accurately mounted on the rotating shaft or workbench of the grinder, avoiding processing errors caused by movement or sliding of the tooling during the grinding process.

[0009] A further solution is as follows: a plurality of slide grooves are evenly arranged along the circumferential direction inside the mounting plate, and connecting blocks are slidably connected in each of the slide grooves. An elastic inner support piece is fixedly connected to the connecting block. Under the extrusion of the tapered shaft mounting piece, the elastic inner support piece slides outward in the slide groove through the connecting block, and the connecting block drives the elastic inner support piece to slide outward until the elastic inner support piece fits with the inner wall of the workpiece to be ground and is evenly tightened. After a clearance fit is formed between the elastic inner support piece and the workpiece, the workpiece is ensured to be stably and accurately fixed during the entire process.

[0010] Further solution: An anti-slip layer is provided on the outer wall of the elastic inner support member, which can protect the workpiece surface while ensuring the fixing effect. The anti-slip layer can enhance the contact stability between the elastic inner support member and the inner wall of the workpiece, ensuring that the workpiece to be ground does not move or rotate under the action of the grinding force.

[0011] Further solution: the tapered shaft mounting part includes a first tapered shaft part and a second tapered shaft part, the diameter of the second tapered shaft part is larger than that of the first tapered shaft part, the first tapered shaft part has a smaller diameter, so that the tapered shaft mounting part can freely enter and exit the gap slot when in the initial position, the second tapered shaft part is tapered, and the radius gradually increases, so that when the tapered shaft mounting part moves downward, the extrusion force on the elastic inner support part can be gradually increased, thereby pushing the elastic inner support part to slide radially, and the tapered design of the second tapered shaft part allows the extrusion process to proceed step by step, and can accurately control the degree of tension of the elastic inner support part, thereby avoiding deformation of the workpiece caused by sudden increase in force.

[0012] Further solution: the threaded pull rods are all provided with hexagonal holes, through which the staff can rotate the threaded pull rods conveniently, thereby ensuring that the downward or upward movement distance of the tapered shaft mounting part can be accurately controlled, thereby improving the fixing effect of the workpiece.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] Install the pull - disk on the grinding machine rotating shaft, sleuth the workpiece to be ground on the outer walls of several elastic inner supports, install one end of the taper - shaft installation piece in the clearance notch, rotate the pull - rod, so that the taper - shaft installation piece moves down a certain distance in the clearance notch. The downward movement of the taper - shaft installation piece squeezes several elastic inner supports, making several elastic inner supports slide a certain distance, and finally fitting and tightening the inner wall of the workpiece to be ground. At this time, there is a clearance fit between several elastic inner supports and the workpiece to be ground. Then, supply it to the grinding machine for grinding. After grinding, just rotate the pull - rod again, so that the taper - shaft installation piece no longer squeezes several elastic inner supports, and several elastic inner supports no longer tighten the workpiece to be ground. Then take out the ground workpiece. The disassembly and installation are convenient, which can realize the clearance fit between the workpiece and the tooling. The workpiece is not easy to be distorted and deformed after grinding, and it is convenient to take and place, without affecting the cylindricity and coaxiality of the workpiece, ensuring that the geometric tolerance meets the production requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] For the convenience of those skilled in the art to understand, the following further describes the present invention in conjunction with the drawings.

[0016] Figure 1 It is an exploded structural schematic diagram of a high - speed shaft seal inner - ring grinding positioning tooling;

[0017] Figure 2 It is an overall sectional structural schematic diagram of the installation disk provided by the present invention;

[0018] Figure 3 It is a structural schematic diagram in the assembled state provided by the present invention.

[0019] In the figure: 1. Pull - disk; 11. Installation hole; 2. Installation disk; 21. Slide groove; 22. Connecting block; 3. Elastic inner support; 31. Clearance notch; 4. Taper - shaft installation piece; 411. Threaded hole; 41. First taper - shaft part; 42. Second taper - shaft part; 5. Threaded pull - rod; 51. Hexagonal socket; 6. Workpiece to be ground. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following details the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0021] In the description of the present utility model, it should be understood that with respect to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0022] In the description of the present utility model, the meaning of several is one or more, the meaning of a plurality is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, above, below, within, etc. are understood as including the present number. If the first and second are described, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0023] In the description of the present utility model, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0024] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the detailed description of the embodiments of the present utility model provided in the drawings below is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0026] Please refer to Figures 1 to 3, in the embodiment of the present utility model, a grinding positioning tooling for the inner ring of a high-speed shaft seal includes a pull disc 1. The pull disc 1 is used to connect the rotating shaft of a grinding machine, providing support and rotational force during grinding. An installation disc 2 is arranged on the pull disc 1. The pull disc 1 is embedded in the installation disc 2 and fixedly connected to the installation disc surface 2. A plurality of elastic inner support members 3 are slidably connected to the installation disc 2. The plurality of elastic inner support members are arranged in a ring to support the inner wall of the workpiece to be ground. A gap notch 31 is formed between the plurality of elastic inner support members 3. The gap notch 31 is used for the insertion and up-and-down sliding of a taper shaft installation member 4. A taper shaft installation member 4 is slidably connected in the gap notch 31. A threaded hole 411 is arranged on the taper shaft installation member 4. A threaded pull rod 5 is rotated in the threaded hole 411. Rotating the threaded pull rod 5 drives the taper shaft installation member 4 to move up and down, adjusting the tension degree of the plurality of elastic inner support members 3. A workpiece to be ground 6 is sleeved on the outer walls of the plurality of elastic inner support members 3;

[0027] During the tooling process, the pull disc 1 is installed on the rotating shaft of the grinding machine. The workpiece 6 to be ground is sleeved on the outer walls of the plurality of elastic inner support members 3. One end of the taper shaft installation member 4 is inserted into the gap notch 31. By rotating the threaded pull rod 5, the taper shaft installation member 4 moves downward. The downward movement of the taper shaft installation member 4 presses the plurality of elastic inner support members 3, causing the plurality of elastic inner support members 3 to slide a certain distance and finally fitting and tightening the inner wall of the workpiece 6 to be ground until it fits and tightens with the workpiece 6 to be ground. After a clearance fit is formed between the elastic inner support member 3 and the workpiece 6 to be ground, the grinding operation is carried out. After grinding, the threaded pull rod 5 is rotated in the reverse direction, so that the taper shaft installation member 4 no longer presses the elastic inner support member 3, and the workpiece is loosened and easy to take out. The elastic inner support member 3 can be dynamically adjusted through the movement of the taper shaft installation member 4, forming a clearance fit with the workpiece 6 to be ground, avoiding the problems of uneven force and distortion of the workpiece during grinding caused by interference fit. The installation and disassembly of the workpiece only require simple rotation of the threaded pull rod 5, without complex tools or operations, simplifying the process of using the tooling. It can achieve a clearance fit between the workpiece and the tooling. The workpiece is not easily distorted after grinding, and it is convenient to take and place, without affecting the cylindricity and coaxiality of the workpiece, ensuring that the geometric tolerance meets the production requirements.

[0028] In one embodiment, please refer to Figure 1 and Figure 3 As shown, an installation hole 11 is arranged at the bottom of the pull disc 1. The pull disc 1 is connected to the rotating shaft of the grinding machine through the installation hole 11, which can ensure that the pull disc 1 is accurately installed on the rotating shaft or workbench of the grinding machine, avoiding machining errors caused by the movement or sliding of the tooling during grinding. The installation hole 11 provides a firm connection point, helping to resist the vibration generated by high-speed rotation during grinding, thereby improving the stability and precision of machining.

[0029] In one embodiment, please refer to Figure 1 and Figure 2As shown in the figure, a plurality of sliding grooves 21 are uniformly arranged along the circumferential direction inside the mounting disk 2. A connecting block 22 is slidably connected in each of the plurality of sliding grooves 21. An elastic inner support member 3 is fixedly connected to the connecting block 22. Under the extrusion of the tapered shaft mounting member 4, the elastic inner support member 3 slides outward in the sliding groove 21 through the connecting block 22. The connecting block 22 drives the elastic inner support member 3 to slide outward until the elastic inner support member 3 abuts against the inner wall of the workpiece to be ground 6 and is evenly tightened. After a clearance fit is formed between the elastic inner support member 3 and the workpiece to be ground 6, a grinding operation is performed to ensure that the workpiece is stably and precisely fixed throughout the process.

[0030] In one embodiment, please refer to Figure 1 and Figure 2 As shown in the figure, anti-slip layers are provided on the outer walls of the elastic inner support members 3. The anti-slip layers are made of high-friction coefficient materials such as rubber and silica gel. The anti-slip layers are coated on the outer surfaces of the elastic inner support members 3 to increase the friction force between the elastic inner support members 3 and the surfaces of the workpieces to be ground 6. The anti-slip layers can protect the workpiece surfaces while ensuring the fixing effect. The anti-slip layers can enhance the contact stability between the elastic inner support members 3 and the inner walls of the workpieces to be ground 6, ensuring that the workpieces to be ground 6 do not displace or rotate under the action of the grinding force.

[0031] In one embodiment, please refer to Figure 1 As shown in the figure, the tapered shaft mounting member 4 includes a first tapered shaft portion 41 and a second tapered shaft portion 42. The diameter of the second tapered shaft portion 42 is larger than that of the second tapered shaft portion 42. The first tapered shaft portion 41 has a smaller diameter, which facilitates the free entry and exit of the tapered shaft mounting member 4 from the clearance notch 31 in the initial position, reducing the resistance of initial installation and adjustment. The first tapered shaft portion 41 realizes the preliminary positioning of the tapered shaft mounting member 4 through matching with the clearance groove and guides the second tapered shaft portion 42 to gradually enter the working position. The second tapered shaft portion 42 is conical with a gradually increasing radius. When the tapered shaft mounting member 4 moves downward, the extrusion force on the elastic inner support member 3 can be gradually increased, thereby pushing the elastic inner support member 3 to slide radially. The larger diameter portion of the second tapered shaft portion 42 increases the contact area between the tapered shaft mounting member 4 and the elastic inner support member 3, enabling sufficient extrusion force to be generated within a limited moving distance. As the tapered shaft mounting member 4 moves downward, the conical portion of the second tapered shaft portion 42 gradually enters the clearance notch 31, contacts the elastic inner support member 3 and applies a gradually increasing radial extrusion force. The conical design of the second tapered shaft portion 42 makes the extrusion force gradually increase, pushing the elastic inner support member 3 to slide outward along the sliding groove 21 until it abuts against and tightens the inner wall of the workpiece to be ground 6. In addition, the conical design of the second tapered shaft portion 42 enables the extrusion process to be carried out step by step, enabling precise control of the tightening degree of the elastic inner support member 3 and avoiding workpiece deformation caused by suddenly increasing the force.

[0032] In one embodiment, please refer to Figure 1As shown, internal hexagonal holes 51 are provided on the threaded tie rod 5, which facilitate the staff to rotate the threaded tie rod 5, ensuring that the distance of the taper shaft mounting part 4 moving down or up can be accurately controlled, and improving the fixing effect of the workpiece.

[0033] The above content is only an example and description of the structure of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution. As long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should all belong to the protection scope of the present invention.

Claims

1. A high-speed shaft seal inner ring grinding and positioning tool, comprising a pull plate (1), characterized in that: The pulling plate (1) is provided with a mounting plate (2), and a plurality of elastic inner support members (3) are slidably connected to the mounting plate (2), and gap notches (31) are formed between the plurality of elastic inner support members (3). A tapered shaft mounting member (4) is slidably connected in the gap notches (31), and a threaded hole (411) is provided in the tapered shaft mounting member (4), and a threaded pull rod (5) is rotated in the threaded hole (411). A workpiece to be ground (6) is sleeved on the outer wall of the plurality of elastic inner support members (3).

2. A high-speed shaft seal inner ring grinding and positioning tool according to claim 1, characterized in that: The bottom of the pull plate (1) is provided with a mounting hole (11).

3. A high-speed shaft seal inner ring grinding and positioning tool according to claim 2, characterized in that: A plurality of slide grooves (21) are evenly arranged inside the installation plate (2) along the circumferential direction, and a connection block (22) is slidably connected inside each of the slide grooves (21), and an elastic inner support member (3) is fixedly connected to the connection block (22).

4. A high-speed shaft seal inner ring grinding and positioning tool according to claim 3, characterized in that: The outer walls of the elastic inner support members (3) are all provided with anti-slip layers.

5. The high-speed shaft seal inner ring grinding and positioning tool according to claim 1, characterized in that: The tapered shaft mounting member (4) comprises a first tapered shaft portion (41) and a second tapered shaft portion (42), wherein the diameter of the second tapered shaft portion (42) is greater than that of the second tapered shaft portion (42).

6. The high-speed shaft seal inner ring grinding and positioning tool according to claim 1, characterized in that: The threaded pull rods (5) are all provided with hexagonal holes (51).

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