Bearing and centering structure of edge driving millstone of vertical mill

Abstract

The utility model discloses a bearing and centering structure of a vertical mill edge driving millstone, which comprises a millstone, a large gear ring, a base, a mirror plate and a bearing and centering component, the millstone is arranged above the base, the lower surface of the millstone is fixed with the large gear ring in a screw joint manner, the lower surface of the large gear ring is fixed with the mirror plate in a screw joint manner, and an inner support and an outer support are arranged on the base. The bearing centering assembly is arranged between the inner support and the outer support and comprises a radial rectangular pipe and an axial rectangular pipe, the lower end of the runner plate slides on the upper surface of the radial rectangular pipe, the axial rectangular pipe is arranged on the side face of the runner plate, and the side face of the runner plate is in sliding contact with the axial rectangular pipe. Grooves are respectively formed in the upper surface of the radial rectangular pipe and the circumferential surface of the axial rectangular pipe, and the grooves are arranged at intervals; the edge sliding centering can bear larger additional horizontal force, so that radial displacement of the large gear ring can be effectively prevented, and correct meshing of the edge transmission large gear ring and the small gear is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding disc load bearing and centering, in particular to a load bearing and centering structure for an edge-driven grinding disc of a vertical mill. Background Technique

[0002] A vertical mill is a widely used grinding equipment in the building materials industry. It mainly grinds, dries, and separates cement raw meal, clinker, slag, etc. A vertical mill generally includes a grinding disc and a drive system for driving the grinding disc to work. The edge-driven grinding disc of a vertical mill generally includes a grinding disc, a large gear under the grinding disc, and a base. The mirror plate screwed under the large gear slides on the thrust bearing bush, and the thrust bearing bush is fixed on the base. The drive system of the edge-driven vertical mill uses a small helical gear to drive the large gear in a reverse tooth manner. During operation, the small gear drives the large gear ring to rotate, and the large gear ring is connected to the grinding disc to drive the grinding disc body to rotate. Due to the uneven wall thickness in the manufacturing of rotating parts and the uneven thickness of the material layer and the hardness of the material during the operation of the mill, the grinding disc will be subjected to a large horizontal additional force, and the grinding disc will displace horizontally. The horizontal displacement of the grinding disc will cause the large gear ring and the small gear to fail to mesh properly, resulting in unstable transmission, increased impact, and reduced gear life. Therefore, there is an urgent need for improved technology in the market to solve the above problems. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a load bearing and centering structure for an edge-driven grinding disc of a vertical mill. The edge sliding centering can bear a large additional horizontal force, which can effectively prevent the radial displacement of the large gear ring, thus ensuring the correct meshing of the edge-driven large gear ring and the small gear, and being beneficial to improving the service life of the reducer. The problems in the background technique can be effectively solved.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A load bearing and centering structure for an edge-driven grinding disc of a vertical mill, including a grinding disc, a large gear ring, a base, a mirror plate, and a load bearing and centering component. The grinding disc is arranged above the base. The lower surface of the grinding disc is fixedly connected to the large gear ring by screwing. The lower surface of the large gear ring is fixedly connected to the mirror plate by screwing. An inner support and an outer support are arranged on the base. The load bearing and centering component is arranged between the inner support and the outer support. The load bearing and centering component includes a radial rectangular pipe and an axial rectangular pipe. The lower end of the mirror plate slides on the upper surface of the radial rectangular pipe. The axial rectangular pipe is arranged on the side of the mirror plate, and the side surface of the mirror plate is in sliding contact with the axial rectangular pipe. Grooves are respectively arranged on the upper surface of the radial rectangular pipe and the circumferential surface of the axial rectangular pipe, and the grooves are arranged at intervals.

[0005] Further, the inner support and the outer support form an annular oil pool on the base, and the load bearing and centering component is located in the annular oil pool.

[0006] Furthermore, axial rectangular tubes are respectively arranged on the inner and outer sides of the mirror plate, and the axial rectangular tubes are wound around in the circumferential direction in an up-and-down manner.

[0007] Furthermore, a laser cladding wear-resistant metal layer or a babbit alloy layer is provided on the upper surface of the radial rectangular tube and the centripetal outer surface of the axial rectangular tube.

[0008] Furthermore, it also includes a permanent magnet motor and a bearing seat. The rotating shaft of the permanent magnet motor passes through the bearing seat and is connected with a small gear, and the small gear meshes with a large gear ring.

[0009] Furthermore, the inner support is fixed to the axial rectangular tube by welding or screwing, and the bottom of the annular oil sump is fixed to the radial rectangular tube by welding or screwing.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] 1. The edge sliding centering can bear a large additional horizontal force, which can effectively prevent the radial displacement of the large gear ring, thus ensuring the correct meshing of the large gear ring of the edge drive and the small gear, and is beneficial to improving the service life of the speed reducer.

[0012] 2. When the axial rectangular tube and the radial rectangular tube fail, only the large gear ring needs to be lifted out to replace the rectangular tube, and the overhaul, maintenance and replacement are very convenient; therefore, the grinding table centering structure for the edge drive vertical mill can bear a large horizontal component force. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Figure 2 It is a schematic structural diagram of the groove arrangement in the rectangular tube of the present utility model;

[0015] Figure 3 It is a schematic structural diagram of the rectangular tubes arranged on both sides of the mirror plate of the present utility model.

[0016] In the figure: 1 permanent magnet motor, 2 bearing seat, 3 grinding table, 4 large gear ring, 5 radial rectangular tube, 6 axial rectangular tube, 7 base, 8 inner support, 9 mirror plate, 10 outer support, 11 small gear, 12 rotating shaft, 13 groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model, 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.

[0018] Please refer to Figures 1-3 , the present utility model provides a technical solution: a load-bearing and centering structure for the edge drive grinding table of a vertical mill, including a grinding table 3, a large gear ring 4, a base 7, a mirror plate 9, and a load-bearing and centering assembly. The grinding table 3 is arranged above the base 7. The lower surface of the grinding table 3 is fixedly screwed to the large gear ring 4. The lower surface of the large gear ring 4 is fixedly screwed to the mirror plate 9. An inner support 8 and an outer support 10 are arranged on the base 7. The load-bearing and centering assembly is arranged between the inner support 8 and the outer support 10. The load-bearing and centering assembly includes a radial rectangular pipe 5 and an axial rectangular pipe 6. The lower end of the mirror plate 9 slides on the upper surface of the radial rectangular pipe 5. The radial rectangular pipe 5 bears the weight of the grinding table 3 and mainly plays a load-bearing role. The axial rectangular pipe 6 is arranged on the side of the mirror plate 9, and the side of the mirror plate 9 is in sliding contact with the axial rectangular pipe 6. The radial pressure is positioned through the axial rectangular pipe 6. The edge sliding centering can bear a large additional horizontal force, which can effectively prevent the large gear ring 4 from having a radial displacement and ensure the stable rotation of the grinding table 3. Grooves 13 are respectively arranged on the upper surface of the radial rectangular pipe 5 and the circumferential surface of the axial rectangular pipe 6. The grooves 13 are arranged at intervals. The grooves 13 are beneficial for the oil inlet of the annular oil pool. The entire rectangular pipe is immersed in the lubricating oil, and the inside of the rectangular pipe is also filled with cooling oil. The oil cooling systems inside and outside the rectangular pipe lubricate and cool at the same time, ensuring the normal operation of the vertical mill.

[0019] The inner support 8 and the outer support 10 form an annular oil pool on the base 7, and the load-bearing and centering assembly is located in the annular oil pool.

[0020] The axial rectangular pipes 6 are respectively arranged on the inner and outer sides of the mirror plate 9. In this way, when the axial rectangular pipes 6 are arranged both inside and outside, the radial force will be greater. The axial rectangular pipes 6 are arranged in a way of coiling up and down in the circumferential direction. The oil inlet pipe from the cold oil system is connected to one end of the rectangular pipe, and the other end of the rectangular pipe is connected to the oil outlet pipe to return the oil to the oil storage tank outside the box body, realizing the circulation of the cooling oil.

[0021] The mirror plate 9 and the outer periphery of the rectangular pipe are immersed in the lubricating oil. The lubricating oil is cooled by an external cooling system. A seal is arranged between the top of the outer support 10 on the base 7 and the lower part of the large gear ring 4.

[0022] When the material of the rectangular pipe is ordinary material, a laser cladding wear-resistant metal layer or a babbit alloy layer needs to be provided on the upper surface of the radial rectangular pipe 5 and the centripetal outer surface of the axial rectangular pipe 6. The surface in contact with the mirror plate 9 needs to be precision turned and polished by a lathe. When the material of the rectangular pipe is stainless steel, the surface in contact with the mirror plate only needs to be precision turned and polished by a lathe.

[0023] The rotating shaft 12 of the permanent magnet motor 1 passes through the bearing seat 2 and is connected with a small gear 11, and the small gear 11 meshes with the large gear ring 4.

[0024] The inner support 8 is welded or screwed to the axial rectangular pipe 6, and the bottom of the annular oil pool is welded or screwed to the radial rectangular pipe 5.

[0025] The base 7 and the inner support 8 have great rigidity, and the deformation generated under the action of the additional horizontal force is very small, thus ensuring the correct meshing of the edge drive large gear ring 4 and the small gear 11, which is beneficial to improving the service life of the gear. The mirror plate 9 and the rectangular pipe are made of different materials. The hardness of the mirror plate 9 is greater than that of the rectangular pipe. The mirror plate 9 and the rectangular pipe have good wear resistance, which has the effect of reducing friction, long service life, greatly improving the use time, and reducing the use cost; the friction power is reduced; the fixing method of the rectangular pipe can be welding or screwing; the whole rectangular pipe is immersed in the lubricating oil, and the inside of the rectangular pipe is also filled with cooling oil. The oil cooling system inside and outside the rectangular pipe lubricates and cools at the same time, ensuring the normal operation of the vertical mill.

[0026] Adopting the above structure not only ensures the smooth operation of the grinding table 3, but also greatly reduces the size and weight of the edge drive large gear ring 4; adopting the load-bearing and centering assembly of the rectangular pipe can ensure the smooth operation of the grinding table 3, so the original upper centering bearing can be omitted; the height of the vertical mill can also be reduced according to the customer's on-site situation, and the self-weight of the vertical mill is greatly reduced, so that the manufacturing, assembly and installation costs of the vertical mill are greatly reduced.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Without departing from the spirit and scope of the present invention, the present invention has various changes and improvements, and these changes and improvements all fall into the scope of the present invention claimed.

Claims

1. A load-bearing and centering structure for an edge-driven grinding disc of a vertical mill, comprising a grinding disc (3), a large gear ring (4), a base (7), a mirror plate (9) and a load-bearing and centering component, characterized in that: The grinding disc (3) is arranged above the base (7), the lower surface of the grinding disc (3) is screwed and fixed to the large gear ring (4), and the lower surface of the large gear ring (4) is screwed and fixed to the mirror plate (9). The base (7) is provided with an inner support (8) and an outer support (10), and a load-bearing centering component is arranged between the inner support (8) and the outer support (10). The load-bearing centering component comprises a radial rectangular tube (5) and an axial rectangular tube (6). The lower end of the mirror plate (9) slides on the upper surface of the radial rectangular tube (5), the axial rectangular tube (6) is arranged on the side of the mirror plate (9), and the side of the mirror plate (9) is in sliding contact with the axial rectangular tube (6). The upper surface of the radial rectangular tube (5) and the circumferential surface of the axial rectangular tube (6) are respectively provided with grooves (13), and the grooves (13) are arranged at intervals.

2. The load-bearing and centering structure of the edge-driven grinding disc of a vertical mill according to claim 1, characterized in that: The inner support (8) and the outer support (10) form an annular oil pool on the base (7), and the load-bearing centering component is located in the annular oil pool.

3. The load-bearing and centering structure of the edge-driven grinding disc of a vertical mill according to claim 1, characterized in that: The axial rectangular tubes (6) are respectively arranged on the inner and outer sides of the mirror plate (9), and the axial rectangular tubes (6) are wound up and down in a circumferential direction.

4. The load-bearing and centering structure of the edge-driven grinding disc of a vertical mill according to claim 1, characterized in that: The upper surface of the radial rectangular tube (5) and the centripetal outer surface of the axial rectangular tube (6) are provided with a laser cladding wear-resistant metal layer or a babbitt alloy layer.

5. The load-bearing and centering structure of the edge-driven grinding disc of a vertical mill according to claim 1, characterized in that: It also includes a permanent magnet motor (1) and a bearing seat (2). The rotating shaft (12) of the permanent magnet motor (1) passes through the bearing seat (2) and is connected to a small gear (11). The small gear (11) is meshed with a large gear ring (4).

6. The load-bearing and centering structure of the edge-driven grinding disc of a vertical mill according to claim 2, characterized in that: The inner support (8) is welded or screwed to the axial rectangular tube (6), and the bottom of the annular oil pool is welded or screwed to the radial rectangular tube (5).

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