Tile grinding device of large rotating equipment

Abstract

The utility model discloses a tile grinding device of large-scale rotating equipment, which belongs to the technical field of tile grinding, is used for replacing a rotor shaft of the large-scale rotating equipment to be placed in a bearing during tile grinding, and comprises a tile grinding shaft, a rotary shaft and a rotary shaft, the outer diameter of the tile grinding shaft is equal to the sum of the size of the bearing position of the rotor shaft and the gap between the rotor shaft and the bearing. The bearing bush grinding shaft with the outer diameter equal to the sum of the size of the bearing position of the rotor shaft and the gap between the rotor shaft and the sliding bearing is arranged and used for replacing the rotor shaft of large rotating equipment to be placed in the bearing (bearing bush) during bearing bush grinding, the bearing bush gap is guaranteed, original shaft (namely the rotor shaft) bearing bush grinding is not needed, and even if the rotor shaft goes out for inspection and overhaul, the bearing bush grinding efficiency is greatly improved. And the tile grinding work is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of grinding tile, and relates to a large -scale rotary equipment grinding tile device. BACKGROUND

[0002] In the metallurgical, chemical and other industries, there are many large rotary mechanical equipment, such as air separation air compressor, steam turbine for power generation, blast furnace blower and the like, these large equipment because of large volume, heavy weight, heavy load, so its core component-rotor shaft, it is supported by sliding bearing (commonly known as 'tile'), and the gap size, precision of sliding bearing and rotor shaft contact directly concerns the temperature and vibration of sliding bearing, thereby affecting the safe and stable operation of the whole equipment.

[0003] At present, the domestic large -scale rotary equipment maintenance usually adopts 'original rotor shaft grinding tile' technology to ensure the contact precision and gap of sliding bearing and rotor shaft.'Grinding tile' work is a delicate process, which needs to be repeated for 6, 7 times or more, and some even reach 15 times or more, and the repeated lifting of rotor shaft is inevitable due to its large weight and danger.

[0004] Specifically, the'sliding bearing and original rotor shaft grinding tile' technology mainly has the following deficiencies:

[0005] 1. Poor safety. Because the rotor shaft is heavy, usually more than 5 tons, the blades and impellers thereof are precision core components, and the 'grinding tile' work is a repeated delicate process, which causes the rotor shaft to be repeatedly lifted and lowered in the air, which is extremely unsafe.

[0006] 2. Low efficiency. The original rotor shaft is used for grinding tile, and the lifting time is consumed, usually by means of the original shell, and the maintenance worker holds the tile up and down, which also consumes time, so the efficiency is low. Especially when the rotor is returned to the factory or sent out for inspection and maintenance, at this time, the grinding tile work cannot be carried out, and the rotor shaft can only be waited for, which is extremely inconsistent with the high efficiency requirement of the times.

[0007] 3. Energy consumption. The original rotor shaft is used for grinding tile, and the maintenance worker needs to hold the tile up and down the equipment without stopping, and a tile is at least more than 50 Jin, which consumes a lot of physical energy.

[0008] Therefore, it is necessary to provide a new type of light, practical large -scale rotary equipment grinding tile device. CONTENT OF THE UTILITY MODEL

[0009] In order to at least solve the problem that the rotor is returned to the factory or sent out for inspection and maintenance in the prior art, and the grinding tile work cannot be carried out due to the lack of rotor shaft, the utility model provides the following technical scheme: a large -scale rotary equipment grinding tile device is used to replace the rotor shaft of the large -scale rotary equipment in the bearing during grinding tile, and the grinding tile device comprises:

[0010] The outer diameter of the bearing shaft is equal to the sum of the bearing position size of the rotor shaft and the gap between the rotor shaft and the bearing.

[0011] Optionally, in the bearing bushing device for large rotating equipment, the length of the bearing shaft is greater than the height of the bearing, and the length of the bearing shaft is less than the length of the rotor shaft.

[0012] Optionally, in the bearing bushing device for large rotating equipment, a notch is formed in the middle of the bearing shaft for fixing the bearing during bearing bushing to prevent the bearing from moving axially.

[0013] Optionally, in the bearing bushing device for large rotating equipment, the outer wall of the bearing shaft is longitudinally cut to form the notch, and the height of the notch is equal to the height of the bearing.

[0014] Optionally, in the bearing bushing device for large rotating equipment, the depth of the notch is less than the radius of the bearing shaft.

[0015] Optionally, in the bearing bushing device for large rotating equipment, the gap between the side of the bearing shaft without the notch and the bearing is not more than 0.02mm.

[0016] Optionally, in the bearing bushing device for large rotating equipment, the bearing shaft is a hollow shaft.

[0017] Optionally, in the bearing bushing device for large rotating equipment, the surface finish of the bearing shaft is not less than 3.2 levels.

[0018] Optionally, in the bearing bushing device for large rotating equipment, the length of the bearing shaft is 300-500mm; and

[0019] The outer diameter of the bearing shaft is 100-300mm.

[0020] Optionally, in the bearing bushing device for large rotating equipment, the bearing is a sliding bearing; and

[0021] The surface of the bearing shaft is coated with a corrosion-resistant coating.

[0022] The technical scheme provided by the embodiments of the present application has the following beneficial effects:

[0023] The bearing shaft with an outer diameter equal to the sum of the bearing position size of the rotor shaft and the gap between the rotor shaft and the sliding bearing is used to replace the rotor shaft of the large rotating equipment in the bearing bushing device, which ensures the bearing gap and does not need to bush the original shaft (rotor shaft), even if the rotor shaft is taken out for inspection and repair, it does not affect the bearing bushing work. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A longitudinal sectional structure schematic view of a large-scale rotary equipment tile grinding device provided by the embodiment of the present application;

[0025] Figure 2 For Figure 1 A-A cross-sectional structure schematic view;

[0026] Figure 3 A working principle schematic view of a large-scale rotary equipment tile grinding device provided by the embodiment of the present application;

[0027] In the figure: 1, tile grinding shaft; 101, inner cavity; 2, notch; 3, bearing. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will make further detailed description on the embodiment of the present application in combination with the drawings.

[0029] In the description of the present application, the orientation or position relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" and the like is the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and does not require the present application to be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application. The terms "connected", "connected", "provided" used in the present application should be understood broadly, for example, it can be fixed connection, or detachable connection; it can be directly connected, or indirectly connected through intermediate components; it can be wired electrical connection, wireless electrical connection, or wireless communication signal connection, and the specific meaning of the above terms can be understood by those skilled in the art according to the specific circumstances.

[0030] Please refer to Figures 1-3 The present application provides the following technical scheme: a large-scale rotary equipment tile grinding device, which is used for replacing the rotor shaft of a large-scale rotary equipment in tile grinding, and is placed in a bearing 3 (commonly known as tile, generally a sliding bearing), so we also call the present tile grinding device as "dummy shaft". The tile grinding device comprises: a tile grinding shaft 1. Specifically, the outer diameter of the tile grinding shaft 1 is equal to the bearing position of the rotor shaft (that is, the height of the bearing 3, which is generally equal to the length of the tile grinding shaft 1), so that the tile grinding shaft 1 can be placed in the bearing 3, and the tile grinding shaft 1 is used to replace the rotor shaft of the large-scale rotary equipment in tile grinding. Figure 3The distance shown in the image (from bottom to top) is the sum of the distance between the bottom and top of bearing 3 and the contact clearance between bearing 3 and rotor shaft. This ensures the bearing clearance without requiring the original shaft (rotor shaft) to be ground. Even if the rotor shaft is out for inspection or maintenance, it will not affect the grinding operation, and it can be used permanently. It should be noted that the diameter tolerance range of the grinding shaft 1 can be designed according to the bearing 3 clearance dimension given by the equipment manufacturer. In addition, the grinding shaft 1 can be either a solid or hollow shaft; this embodiment does not limit its specific shape.

[0031] The length of the bearing shaft 1 is greater than the height of the bearing 3 (in Figure 3 In the diagram, the height of bearing 3 refers to the distance between the bottom and top of bearing 3 in the vertical direction, and the width of bearing 3 refers to the distance between one end and the other in the horizontal direction. Simultaneously, the length of the grinding shaft 1 is less than the length of the rotor shaft (not shown in the diagram). This reduces the weight of the grinding shaft 1 while ensuring normal operation, making it more labor-saving. Preferably, after use, an anti-corrosion coating, such as oil or rust inhibitor, is applied to the surface of the grinding shaft 1 for preservation and future use.

[0032] Reference Figure 1 As shown, a notch 2 is provided in the middle of the grinding shaft 1. If a section of the outer wall of the grinding shaft 1 is longitudinally cut (i.e., along the length of the grinding shaft 1), notch 2 is formed. The height of notch 2 is equal to the height of the bearing 3. This notch 2 is used to fix (engage) the bearing 3 during grinding, preventing axial movement of the bearing 3. During grinding, the grinding shaft 1 fixes the bearing 3 in a small space. Preferably, the depth of notch 2 is less than the radius of the grinding shaft 1. See also... Figure 3 As shown, the grinding shaft 1 is placed inside the bearing 3, and then the bearing 3 is pushed into the notch 2 of the grinding shaft 1. The grinding shaft 1 is rotated to perform grinding work (which can also be simply understood as polishing). The maintenance worker does not need to constantly carry the bearing 3 (commonly known as the bearing) up and down the equipment, saving time, effort, and safety. It should be noted that the actual weight of the bearing 3 in this article is not less than 25 kg, and the gap between the side of the grinding shaft 1 without the notch and the bearing 3 does not exceed two-thousandths of a millimeter.

[0033] As an advantage of the above embodiment, in this embodiment, the surface finish of the grinding bearing 1 is not less than grade 3.2, which can ensure the contact accuracy between the bearing 3 and the rotor shaft. At the same time, the grinding bearing contact points are uniform, and the gap directly meets the design value, avoiding scratches on the bearing surface caused by insufficient surface finish, which would affect the contact of the bearing surface.

[0034] This application boasts low manufacturing costs, utilizing steel bars with a length of 300-500 mm and a diameter of 100-300 mm. The bars are manufactured one-to-one using turning, tailored to the bearing position dimensions of the rotor shaft of large rotating equipment. The resulting grinding shaft 1 is small in size, easy to store, and highly specific. Preferably, for greater labor savings, the grinding shaft 1 can be made into a hollow shaft, such as... Figure 2 As shown, the grinding shaft 1 has an inner cavity 101, and the maximum depth of the notch 2 is less than the wall thickness of the grinding shaft 1.

[0035] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. A grinding device for large rotating equipment, used to replace the rotor shaft of the large rotating equipment within a bearing during grinding, characterized in that, The grinding device includes: The outer diameter of the grinding bearing shaft is equal to the sum of the bearing position size of the rotor shaft and the clearance between the rotor shaft and the bearing; The grinding shaft has a notch in the middle to fix the bearing during grinding and prevent the bearing from moving axially. The notch is formed by longitudinally cutting a section of the outer wall of the bearing shaft, and the height of the notch is equal to the height of the bearing.

2. The large rotating equipment grinding device according to claim 1, characterized in that, The length of the grinding wheel shaft is greater than the height of the bearing, and the length of the grinding wheel shaft is less than the length of the rotor shaft.

3. The large rotating equipment grinding device according to claim 1, characterized in that, The depth of the notch is less than the radius of the grinding wheel shaft.

4. The large rotating equipment grinding device according to claim 1, characterized in that, The gap between the side of the grinding shaft without the notch and the bearing shall not exceed two-thousandths of a millimeter.

5. The large rotating equipment grinding device according to claim 1, characterized in that, The grinding shaft is a hollow shaft.

6. The large rotating equipment grinding device according to claim 1, characterized in that, The surface finish of the grinding wheel shaft is not less than grade 3.

2.

7. The large rotating equipment grinding device according to claim 1, characterized in that, The length of the grinding shaft is 300–500 mm; and The outer diameter of the grinding wheel shaft is 100-300 mm.

8. The large rotating equipment grinding device according to claim 1, characterized in that, The bearing is a sliding bearing; and The surface of the grinding shaft is coated with an anti-corrosion coating.

Images