Rotor shaft large-length-diameter-ratio deep blind hole polishing and grinding device

Abstract

The utility model provides a rotor shaft large length-diameter ratio deep blind hole polishing and burnishing device, which belongs to the deep blind hole processing and manufacturing field, and comprises a first joint, an extension rod, a second joint, a collet chuck and a flap wheel, one end of the first joint is a solid connecting rod, the other end of the first joint is provided with an inward thread, the two ends of the extension rod are provided with threads along the circumferential direction, and the second joint is provided with an inward thread. One end of the second connector is provided with inward threads, the other end of the second connector is fixedly connected with the collet chuck, and a connecting rod is perpendicularly arranged in the center of the side face of the flap wheel and connected with the collet chuck. Deep blind hole polishing and grinding can be conducted on a workpiece without being placed on a machine tool, the nylon supporting sleeve ensures that the rotating posture of the extension rod is stable, polishing and grinding quality is ensured, and good practicability is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of deep blind hole processing and manufacturing, and specifically relates to a polishing and grinding device for deep blind holes of a rotor shaft with a large length-diameter ratio. Background Art

[0002] The rotor shaft is a core component of power generation equipment and one of the core devices for converting mechanical energy into electrical energy. It is usually made of a cylindrical metal material, and its structure includes a shaft body and shaft ends; the shaft body is the central part, and the shaft ends are the two ends connecting the shaft body and other components, and usually require components such as bearings and couplings to cooperate. The rotor shaft is related to rotational motion and needs to withstand huge torques and speeds to rotate the rotor shaft, thereby driving other components to move. Therefore, the selected materials and processing technologies must be excellent.

[0003] The diameter of the central hole of the rotor shaft is generally 60 mm, the depth reaches 1815 mm, the length-diameter ratio reaches 30:1, the coaxiality and straightness requirements of the hole diameter are relatively high, and it is a blind hole. During rough drilling, the use of a floating boring tool can meet the requirements. In the later stage of reaming and improving the surface roughness of the hole diameter, due to the relatively deep hole, the iron chips at the deep part are not easy to return, resulting in grooves on the hole wall. In particular, the processing of the hole bottom cannot meet the requirements. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is the drawbacks that the ultra-deep blind hole of the rotor shaft of the power generation equipment with a length-diameter ratio of 30:1 is not easy to discharge chips during the processing, the surface finish of the inner wall of the hole is poor, the production efficiency is low, and the coaxiality, straightness and accuracy of the processed hole are not easy to guarantee. In view of the deficiencies of the prior art, a polishing and grinding device for deep blind holes of a rotor shaft with a large length-diameter ratio is provided.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0006] The polishing and grinding device for deep blind holes of a rotor shaft with a large length-diameter ratio includes a first joint, an extension rod, a second joint, a collet and a hundred-leaf wheel. One end of the first joint is a solid connecting rod, and the other end has an internally threaded opening. Threads are arranged circumferentially at both ends of the extension rod. One end of the second joint has an internally threaded opening, and the other end is fixedly connected to the collet. A connecting rod is vertically arranged at the center of the side surface of the hundred-leaf wheel, and the connecting rod is connected to the collet.

[0007] Further, a plurality of support sleeves are sleeved on the outer surface of the extension rod.

[0008] Further, the support sleeve is made of nylon material.

[0009] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0010] 1) The flap wheel rotates to timely clean the debris generated by polishing along the gaps between the wheels, ensuring that the hole wall and hole bottom are not scratched by iron filings and improving the surface finish of the hole.

[0011] 2) The nylon material has excellent hardness and wear resistance. The nylon support sleeve supports the extension rod, ensuring the straightness and coaxiality of the ultra-deep hole, and improving the processing efficiency and polishing quality.

[0012] 3) The structure is simple, the operation is convenient, and the cost is low. The workpiece does not need to be placed on the machine tool. After being placed stably on the ground, the hole wall and hole bottom can be polished by the polishing device. There is no need to customize special processing tools and equipment, which greatly saves the tool cost and the cost of ordering tooling. It can be adapted to deep hole drilling and boring machines and various boring and milling machines. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the electric drill in Embodiment 1 of the present utility model;

[0014] Figure 2 It is a schematic structural diagram of the polishing device in Embodiment 1 of the present utility model;

[0015] Figure 3 It is a side view of the structural diagram of the polishing device in Embodiment 1 of the present utility model.

[0016] Among them, 1 - hand-held electric drill, 2 - drill chuck, 3 - first joint, 4 - support sleeve, 5 - extension rod, 6 - second joint, 7 - collet, 8 - flap wheel. Detailed Embodiments

[0017] To make the objectives, technical solutions, and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] In the description of the present utility model, it should be noted that the orientation or positional relationships indicated by the terms "upper", "lower", "horizontal", "top", "side", "far", "near", "inner", and "outer" are all based on the orientation or positional relationships shown in the drawings. They are 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, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0019] In the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0020] Embodiment 1

[0021] Refer to Figures 1 - 3 , the rotor shaft deep blind hole polishing device with a large length-diameter ratio is mainly divided into three parts, namely a hand-held electric drill 1, an extension rod 5, and a hundred-leaf wheel 8. A drill chuck 2 is installed at the front end of the hand-held electric drill 1. One end of the first joint 3 is a solid connecting rod, and the other end has an internally threaded opening. The drill chuck 2 is connected to the solid fixed rod of the first joint 3. Threads are circumferentially arranged at both ends of the extension rod 5, and a plurality of support sleeves 4 are sleeved on the outer surface of the extension rod 5. One end of the second joint 6 has an internally threaded opening, and the other end is fixedly connected to a collet 7. The hundred-leaf wheel 8 is provided with a connecting rod along the direction perpendicular to the side plane from the center of the side plane, and the connecting rod is connected to the collet 7.

[0022] When using the rotor shaft deep blind hole polishing device with a large length-diameter ratio, connect the drill chuck 2, the first joint 3, the extension rod 5, the second joint 6, and the hundred-leaf wheel 8 in sequence, and the torsional force of the hand-held electric drill 1 can be transmitted to the hundred-leaf wheel 8. The extension rod 5 with different length specifications and the hundred-leaf wheel 7 with different rotation radii can be replaced according to actual operation requirements.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not restrictive. Other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present utility model should be covered within the scope of the claims of the present utility model as long as they do not depart from the spirit and scope of the technical solutions of the present utility model.

[0024] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rotor shaft deep blind hole polishing device with a large length-diameter ratio, characterized in that: It includes a first joint (3), an extension rod (5), a second joint (6), a collet (7) and an abrasive disc (8). One end of the first joint (3) is a solid connecting rod, and the other end has an internally threaded opening. Threads are circumferentially provided at both ends of the extension rod (5). One end of the second joint (6) has an internally threaded opening, and the other end is fixedly connected to the collet (7). A connecting rod is vertically provided at the center of the side surface of the abrasive disc (8), and the connecting rod is connected to the collet (7).

2. The deep blind hole polishing device for a rotor shaft with a large length-diameter ratio according to claim 1, characterized in that: A plurality of support sleeves (4) are sleeved on the outer surface of the extension rod (5).

3. The deep blind hole polishing device for a rotor shaft with a large length-diameter ratio according to claim 2, characterized in that: The support sleeve (4) is made of nylon material.

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