Improved structure of bull gear in speed reducer of vertical mill

Abstract

The utility model discloses an improved structure of a bull gear in a vertical mill speed reducer, which comprises a lower box body, an upper box body, a bearing positioning support frame, a bull gear, a bevel gear and a bull gear shaft, the upper end of the lower box body is connected with the lower end of the upper box body through a flange, the bearing positioning support frame is fixed in the upper box body, the bull gear is arranged below the bearing positioning support frame, and the bevel gear is arranged on the bull gear shaft. The bevel gear is meshed with the large gear in the horizontal direction, one end face of the bevel gear is connected with a bevel gear shaft, the bevel gear shaft penetrates to the outer side of the lower box body, a gap is reserved between the large gear and the inner wall of the lower box body, and the large gear is arranged on the large gear shaft. A flange, extending out of the upper box body, of the bearing positioning support frame in a circumferential expanding manner is in threaded connection with a flange, extending out of the box body, at the top end of the lower box body; the improved structural layout of the bull gear is reasonable, the working condition requirements of high-strength vertical mill operation can be fully met, and matched parts do not need to be subjected to large-scale design, so that related operations such as overall storage, transportation and maintenance of equipment are simple, convenient and feasible.

Description

Technical Field

[0001] The utility model relates to the technical field of supporting power systems of vertical mill reducers, in particular to an improved structure of a large gear in a vertical mill reducer. Background Art

[0002] At present, domestic cement production lines are gradually developing towards scale and large-scale. At the same time, with the continuous improvement of environmental protection requirements, the demand for slag, water slag and steel slag grinding has also increased accordingly; as important operating equipment for the above-mentioned grinding conditions, vertical mill system-related equipment is also developing towards large-scale and ultra-large-scale to improve the power performance and working condition processing capacity of vertical mill equipment, so as to adapt to the supporting construction needs of large-scale dry cement production lines and slag grinding lines; Chinese patent application No. 202110134305.5 discloses a vertical mill reducer drive structure , including a box body and a plurality of driving gear train components uniformly distributed on the outer periphery of the box body along the circumferential direction, the output end of the box body is coaxially provided with an output flange, and the interior of the box body is provided with a driving gear train component that is transmission-connected between the driving gear train component and the output flange; the driving gear train component includes a motor, a torsion shaft, a pinion and a support seat, the motor is arranged on the side of the box body, the support seat is aligned with the motor, the pinion is supported on the support seat by a bearing, one end of the torsion shaft is linked to the motor shaft of the motor, and the other end of the torsion shaft is linked to the pinion; the driving gear train component includes a large gear The gear, the large gear seat, the internal gear sleeve, the drum gear shaft, the sun gear, the planet gear, the internal gear ring, the planet gear shaft and the planet carrier, the large gear and the small gear meshing match, the large gear seat is respectively connected with the large gear and the internal gear sleeve, one end of the drum gear shaft meshes with the internal gear sleeve, and the other end of the drum gear shaft meshes with the sun gear; the component structure layout of the drive system is relatively reasonable, which can fully meet the working conditions of high-intensity vertical mill operations, and its supporting components do not need to be large-scaled, so that the overall storage, transportation and maintenance of the equipment and other related operations are relatively simple and easy; but the patent There are also the following defects: 1. The large gear inside the reducer is not maximized, the reduction ratio is increased, and the motor cost is high; 2. The internal gear sleeve, drum gear shaft, sun gear, planetary gear, planetary gear shaft, planetary carrier, and bearings are wearing parts, the cost of the reducer is high, and the maintenance cost is also high; 3. There is a secondary thrust bearing, and there will be a force contradiction between the secondary thrust bearing and the primary thrust bearing; 4. The transmission structure is complex, the motor is difficult to manufacture, and the motor installation and subsequent maintenance are inconvenient; In response to the above problems, an improved structure of the large gear inside the vertical mill reducer is proposed. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide an improved structure of the large gear in the vertical mill reducer. The improved structure of the large gear is novel in layout and can fully meet the working conditions of high-intensity vertical mill operations, and its supporting components do not need to be large-scaled, thereby making the overall storage, transportation and maintenance of the equipment and other related operations relatively simple and easy; it can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an improved structure of a large gear in a vertical mill reducer, comprising a lower box body, an upper box body, a bearing positioning support frame, a large gear, a bevel gear and a large gear shaft, the upper end of the lower box body is connected to the lower end of the upper box body by a flange, the bearing positioning support frame is fixed in the upper box body, the large gear is located below the bearing positioning support frame, the bevel gear is meshed with the large gear in the horizontal direction, one end face of the bevel gear is connected to the bevel gear shaft, the bevel gear shaft passes through the outside of the lower box body, a gap is left between the large gear and the inner wall of the lower box body, and the large gear is arranged on the large gear shaft.

[0005] Furthermore, the flange of the bearing positioning support frame extending out of the upper box body and extending out of the box body at the top end of the lower box body is screwed to each other.

[0006] Furthermore, an upper bearing is provided between the large gear shaft and the bearing positioning support frame, a lower bearing is provided between the lower end of the large gear shaft and the bottom plate of the lower box body, and the upper end of the large gear shaft is connected to the grinding disc through a plurality of pins.

[0007] Furthermore, a support bearing is provided on the outer side of the lower box body, and the bevel gear shaft passes through the support bearing and is connected to the bevel gear through a spline. A motor is provided on the outer side of the lower box body, and the output shaft of the motor is connected to one end of the bevel gear shaft through a spline.

[0008] Furthermore, the large gear is configured as an upper geared gear or a lower geared gear.

[0009] Furthermore, a thrust bearing is provided between the grinding disc and the bearing positioning support frame.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. The large gear inside the reducer is maximized, the reduction ratio is increased, the motor cost is greatly reduced, the transmission structure of the tooth power is changed, and the motor manufacturing, motor installation and subsequent maintenance are convenient; the change of the tooth angle and the gear clearance adjustment can be completed in advance before leaving the factory, which makes on-site matching of the motor and reducer much more convenient, and the elimination of the secondary thrust bearing reduces the force conflict with the primary thrust bearing.

[0012] 2. The improved structural layout of the large gear is more reasonable, which can fully meet the working conditions of high-intensity vertical mill operations, and its supporting components do not need to be large-scaled, making the overall storage, transportation and maintenance of the equipment relatively simple and easy. This structure can also be applied to vertical mill reducers. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the lower toothed gear of the utility model.

[0015] In the figure: 1 lower housing, 2 lower bearing, 3 bottom plate, 4 bevel gear, 5 support bearing, 6 bevel gear shaft, 7 upper housing, 8 bearing positioning support frame, 9 large gear, 10 upper bearing, 11 large gear shaft, 12 grinding disc, 13 thrust bearing, 14 motor. DETAILED DESCRIPTION

[0016] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0017] See also Figure 1-2 The utility model provides a technical solution: an improved structure of a large gear in a vertical mill reducer, comprising a lower box body 1, an upper box body 7, a bearing positioning support frame 8, a large gear 9, a bevel gear 4 and a large gear shaft 11. The upper end of the lower box body 1 is connected to the lower end of the upper box body 7 by a flange. The interior of the box body composed of the lower box body 1 and the upper box body 7 and the interior of the gear assembly are provided with an oil chamber capable of containing lubricating oil. The bearing positioning support frame 8 is fixed in the upper box body 7. The large gear 9 is located below the bearing positioning support frame 8. The bevel gear 4 meshes with the large gear 9 in the horizontal direction. One end face of the bevel gear 4 is connected with the bevel gear shaft 6, which passes through the outside of the lower box body 1. A gap is left between the large gear 9 and the inner wall of the lower box body 1. The gap is not more than 20 mm, and the diameter of the large gear 9 is maximized as much as possible, thereby increasing the reduction ratio of the large gear 9 and the bevel gear 4, reducing the manufacturing cost of the motor 14, and the large gear 9 is arranged on the large gear shaft 11.

[0018] The flange of the bearing positioning support frame 8 extending circumferentially out of the upper box body 7 is screwed to the flange of the top of the lower box body 1 extending out of the box body. The bearing positioning support frame 8, the upper box body 7 and the lower box body 1 jointly support all the weight of the vertical mill reducer.

[0019] When inspecting the large gear 9, bevel gear 4 and bearings, it is necessary to open the screws on the outer peripheral flange of the vertical grinding reducer housing, lift out the upper housing 7, and the large gear 9 is also lifted out for maintenance. Vertical wing ribs are installed on the inside and outside of the lower housing 1 of the reducer to enhance the support strength. The external support of the bearing at the bottom of the housing is designed and manufactured according to conventional theory.

[0020] An upper bearing 10 is arranged between the large gear shaft 11 and the bearing positioning support frame 8, and a lower bearing 2 is arranged between the lower end of the large gear shaft 11 and the bottom plate 3 of the lower box body 1. The upper end of the large gear shaft 11 is connected to the grinding disc 12 through a number of pins, and the torque is transmitted through a number of pins. The rotating shaft is hoisted by screwing the cover plate through-hole set at the upper end of the center of the grinding disc 12 and the axial end screw hole of the large gear shaft 11, eliminating the need to repeatedly set up a secondary thrust bearing device under the large gear 9, and a labyrinth seal is set between the lower periphery of the grinding disc 12 and the upper part of the outer peripheral oil baffle of the upper box body 7.

[0021] A support bearing 5 is provided on the outer side of the lower housing 1, and the bevel gear shaft 6 passes through the support bearing 5 and is connected to the bevel gear 4 by a spline. A motor 14 is provided on the outer side of the lower housing 1. The motor 14 is preferably a nepheline iron boron permanent magnet motor. Other types of permanent magnet motors can also be selected based on actual working conditions, comprehensive equipment cost and other factors. In principle, as long as it can meet the actual application needs of the drive system, the output shaft of the motor 14 is connected to one end of the bevel gear shaft 6 by a spline. The spline connection structure is simple and the transmission is smooth and efficient, which can fully ensure the transmission efficiency and torque transmission stability between the torsion shaft and the transmission linkage parts such as the motor 14 and the bevel gear 4. Of course, the transmission connection between the torsion shaft and the motor 14 and the bevel gear 4 is not limited to being achieved by the above-mentioned spline structure, but can also be achieved by other functional components that can achieve stable linkage, such as locking pin keys and slots. Those skilled in the art can flexibly select and adjust the specific connection method between the torsion shaft and its related transmission adapter according to actual working conditions. In principle, as long as it can ensure the linkage transmission effect of the torsion shaft related transmission parts and meet the actual application needs of the drive system, it can be achieved.

[0022] The large gear 9 is set as the upper gear or the lower gear. When it is set in reverse, the bevel gear shaft 6 needs to be adjusted up and down on the lower box 1 of the vertical mill reducer.

[0023] A thrust bearing bush 13 is provided between the grinding disc 12 and the bearing positioning support frame 8 .

[0024] During operation, the driving wheel train components uniformly distributed around the box body are used to work together to drive the output flange to rotate synchronously through the transmission wheel train component, thereby completing the overall power output of the drive system. Alternatively, a system operation mode can be adopted in which one driving wheel train component cooperates with the transmission wheel train component to drive the output flange to rotate. As long as stable and powerful power output is achieved and the power output provided at the output flange can meet the corresponding high-intensity vertical mill operation requirements, the output power and operating efficiency of the vertical mill reducer can be fully guaranteed without the need for large-scale component design. The entire component structure of the drive system is relatively sophisticated and compact, and the equipment lifting, storage, transportation, installation, layout, inspection and maintenance are simple and easy.

[0025] The bolts and pins mentioned above can be replaced by other types of linkage connectors such as locks or hooks; in principle, as long as they can ensure a reliable transmission connection between two adjacent adapters and meet the actual working conditions and application requirements of the drive system.

[0026] 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 may also have various changes and improvements, which fall within the scope of the present invention to be protected.

Claims

1. An improved structure of a large gear in a vertical mill reducer, comprising a lower housing (1), an upper housing (7), a bearing positioning support frame (8), a large gear (9), a bevel gear (4) and a large gear shaft (11), characterized in that: The upper end of the lower box body (1) is connected to the lower end of the upper box body (7) through a flange, the bearing positioning support frame (8) is fixed in the upper box body (7), the large gear (9) is located below the bearing positioning support frame (8), the bevel gear (4) is engaged with the large gear (9) in the horizontal direction, one end face of the bevel gear (4) is connected to the bevel gear shaft (6), the bevel gear shaft (6) passes through the outer side of the lower box body (1), a gap is left between the large gear (9) and the inner wall of the lower box body (1), and the large gear (9) is set on the large gear shaft (11).

2. The improved structure of the large gear inside the vertical mill reducer according to claim 1, characterized in that: The flange of the bearing positioning support frame (8) extending out of the upper box body (7) and extending out of the box body at the top end of the lower box body (1) is screwed to each other.

3. The improved structure of the large gear in the vertical mill reducer according to claim 1, characterized in that: An upper bearing (10) is provided between the large gear shaft (11) and the bearing positioning support frame (8), a lower bearing (2) is provided between the lower end of the large gear shaft (11) and the bottom plate (3) of the lower box (1), and the upper end of the large gear shaft (11) is connected to the grinding disc (12) through a plurality of pins.

4. The improved structure of the large gear in the vertical mill reducer according to claim 1, characterized in that: A support bearing (5) is provided on the outer side of the lower box body (1), and the bevel gear shaft (6) passes through the support bearing (5) and is connected to the bevel gear (4) through a spline. A motor (14) is provided on the outer side of the lower box body (1), and an output shaft of the motor (14) is connected to one end of the bevel gear shaft (6) through a spline.

5. The improved structure of the large gear inside the vertical mill reducer according to claim 1, characterized in that: The large gear (9) is configured as an upper gear or a lower gear.

6. The improved structure of the large gear inside the vertical mill reducer according to claim 3, characterized in that: A thrust bearing bush (13) is provided between the grinding disc (12) and the bearing positioning support frame (8).

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