Structure of helical tooth gear-driven vertical mill bull gear for obliquely installing motor

Abstract

The utility model discloses a helical-tooth gear-driven vertical mill bull gear structure for obliquely installing a motor, which comprises a vertical mill speed reducer, a small bearing support seat, a large bearing support seat, a lengthened conical barrel, a small helical gear, a bearing support seat and a permanent magnet motor, and the permanent magnet motor is arranged on an inclined surface of a motor seat on the side surface of the vertical mill speed reducer. A motor front end cover and a motor rear end cover are arranged at the two ends of a permanent magnet motor shell respectively, the motor front end cover is independently fixed to a motor base, the motor front end cover is in threaded connection with the motor shell, one end of a lengthened conical barrel is fixedly connected with the motor front end cover through a flange, and the other end of the lengthened conical barrel is fixedly connected with a small bearing supporting seat. The small bearing supporting seat is welded and fixed with the outer support of the bearing supporting seat; the small bevel gear is mounted obliquely above the large gear ring, the height point of the small bevel gear is lower than the horizontal plane of the speed reducer millstone, mounting of components above the speed reducer millstone and peripheral baffles is not affected, vibration force is small during starting, and noise is low.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical mill driving, in particular to a structure of a helical gear vertical mill gear for tilted installation of a motor. Background Art

[0002] As an important operating equipment for grinding conditions, the vertical mill reducer adapts to the supporting construction needs of large-scale dry cement production lines and slag grinding lines. A structure with a large gear ring embedded in the circumference of the grinding disc at the top of the vertical mill reducer has emerged. This large gear ring is installed with a small cone gear on the shaft of the synchronous motor and is suitable for vertical mills of different powers.

[0003] The method of installing a small bevel gear on the shaft of the synchronous motor. During the operation of the reducer equipment, after the motor is installed, its output shaft is usually set horizontally. Due to the limited upper and lower space inside the vertical mill support structure, the synchronous motor is generally designed with a motor housing diameter that is too high and cannot be installed horizontally. The shaft needs to be extended to extend outside the vertical mill support structure to install the synchronous motor. The blind lengthening of the motor shaft causes the deflection and rigidity of the extended shaft to fail to meet the actual requirements, resulting in the occurrence of shaft breakage. Due to the limited installation height, the traditional small gear ring gearing method of the large gear ring is to install a small gear under the large gear ring. The small gear is easy to cause the reducer grinding disc tooth to vibrate upward at the driving moment of the gearing large gear ring.

[0004] The bearings installed in the conventional motor end cover are subject to little force, and are far away from the gear meshing force point, so the torque of the shaft is obviously insufficient; it cannot meet the needs of actual use, so there is an urgent need for improved technology in the market to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide a structure of a large gear of a helical geared vertical mill for tilted installation of a motor. The permanent magnet motor and the vertical mill reducer are tilted and installed in close proximity, occupying a small area. Affected by the space, the highest point of the gear after installation does not exceed the plane of the reducer grinding disc. The small helical gear-driven large gear ring installed on the motor shaft drives the reducer grinding disc to rotate, and the tooth force is downward. The vibration force and noise are small during startup. The front end cover of the motor is a permanent magnet motor and a small helical gear combined base using an extended cone barrel design. The combined bearing support seat is screwed to the large bearing support seat and then to the motor seat. The improved combined base has enhanced torque and a strong structure, which can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a structure of a helical gear vertical mill large gear for inclined installation of a motor, comprising a vertical mill reducer, a small bearing support seat, a large bearing support seat, an extended cone barrel, a small helical gear, a bearing support seat and a permanent magnet motor, the permanent magnet motor being installed on the inclined surface of the motor seat on the side of the vertical mill reducer, a motor front end cover and a motor rear end cover being respectively provided at both ends of a motor housing of the permanent magnet motor, the motor front end cover being independently fixed to the motor seat, the motor front end cover being screwed to the motor housing, one end of the extended cone barrel being fixedly connected to the motor front end cover through a flange, the other end of the extended cone barrel being fixedly connected to the small bearing support seat, the small bearing support seat being fixedly welded to the outer support of the bearing support seat, the lower end of the small bearing support seat being fixed to the upper end of the large bearing support seat, the large bearing support seat being fixedly connected to the motor seat, the output shaft of the permanent magnet motor passing through the extended cone barrel and the bearing support seat, and being connected with a small helical gear.

[0007] Furthermore, the large bearing support seat is threadedly connected to the small bearing support seat, and an adjustment gasket is arranged between the large bearing support seat and the small bearing support seat.

[0008] Furthermore, the rear end cover of the motor is screwed to the motor housing, the rear end cover of the motor is screwed to the motor seat, a thrust bearing is arranged inside the rear end cover of the motor, and a bearing outer end cover is arranged outside the thrust bearing.

[0009] Furthermore, the thrust bearing may also be a four-point contact ball bearing, and cylindrical roller bearings are respectively arranged in the rear end cover and the front end cover of the motor.

[0010] Furthermore, a reducer grinding disc is arranged on the vertical mill reducer, a large gear ring is arranged in the outer circumferential direction of the reducer grinding disc, and the large gear ring is meshed with the small helical gear.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. A small helical gear is installed obliquely above the large gear ring. The height of the small helical gear is lower than the horizontal plane of the reducer grinding disc, which does not affect the installation of the components above the reducer grinding disc and the peripheral stopper. The tooth force of the small helical gear is downward, and the vibration force and noise are low during starting.

[0013] 2. A small helical gear is installed on the shaft of the permanent magnet motor. The permanent magnet motor must bear both axial force and radial force. The front end cover of the motor is designed as a thickened and weighted base for the permanent magnet motor and the small helical gear, and is screwed to the motor seat. The bearing support system of the small helical gear is combined with the bearing system of the permanent magnet motor, avoiding the problem of easy shaft breakage due to three-point support. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2It is a right side structural schematic diagram of the permanent magnet motor of the utility model.

[0016] In the figure: 1 vertical mill reducer, 2 large gear ring, 3 reducer grinding disc, 4 small bevel gear, 5 bearing support seat, 6 extended cone barrel, 7 motor housing, 8 motor rear end cover, 9 thrust bearing, 10 bearing outer end cover, 11 motor seat, 12 motor front end cover, 13 large bearing support seat, 14 small bearing support seat, 15 adjustment gasket. DETAILED DESCRIPTION

[0017] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships 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, and therefore should not be understood as a limitation on the present invention.

[0018] See also Figure 1-2The utility model provides a technical solution: a structure of a helical gear driven vertical mill large gear for tilting installation of a motor, comprising a vertical mill reducer (1), a small bearing support seat (14), a large bearing support seat (13), an extended cone barrel (6), a small helical gear (4), a bearing support seat (5) and a permanent magnet motor. The permanent magnet motor is installed on the inclined surface of the motor seat (11) on the side of the vertical mill reducer (1). The permanent magnet motor and the vertical mill reducer are installed in a close distance and tilted, so that the occupied area is small. Due to the influence of space, the highest point of the gear after installation does not exceed the grinding disc plane. The small helical bevel gear driven large gear ring installed at the end of the motor shaft drives the reducer grinding disc to rotate, and the tooth force is downward, so the vibration force is small when starting. , low noise, the two ends of the permanent magnet motor housing (7) are respectively provided with a motor front cover (12) and a motor rear cover (8), the motor front cover (12) is independently fixed to the motor base (11), the motor front cover (12) and the motor housing (7) are screwed, the number of screws should be set at multiple points, the steel screws should have a certain strength to prevent the screws from breaking or the flange from deforming, one end of the extended cone barrel (6) is fixedly connected to the motor front cover (12) through a flange, and the other end of the extended cone barrel (6) is fixedly connected to the small bearing support seat (14) by welding or bolting, and the outer periphery of the extended cone barrel (6) is welded with wing ribs to strengthen the strength, the small bearing The support seat (14) is welded and fixed to the outer support of the bearing support seat (5), the lower end of the small bearing support seat (14) is fixed to the upper end of the large bearing support seat (13), the large bearing support seat (13) is fixedly connected to the motor seat (11), the large bearing support seat (13) can be welded to the motor seat (11), or can be independently cast and screwed to the motor seat (11), the output shaft of the permanent magnet motor passes through the extended cone barrel (6) and the bearing support seat (5), and is connected with a small bevel gear (4), the small bevel gear (4) can be connected to the motor shaft through a spline, the spline transmission efficiency and torque transmission are stable, of course, the transmission connection is not limited to the spline structure The bearing in the front end cover (12) of the motor bears both the radial force of the permanent magnet motor and the tooth force of the gear. The front end cover (12) of the motor, as the base for the permanent magnet motor and the small helical gear (4), needs to be thickened and weighted and screwed to the motor seat (11). Of course, the screw connection structure with the housing should also be strengthened. The bearing support system of the small helical gear (4) is combined with the bearing system of the permanent magnet motor, avoiding the problem of easy shaft breakage due to three-point support. The conventional motor end cover is provided with a bearing which is first screwed to the motor housing (7) and then screwed to the inclined motor seat (11) at the base screw through hole of the motor housing (7). This is an inferior design and is generally not adopted.

[0019] A permanent magnet motor is installed on the side wall of the body of the vertical mill reducer (1). When the capacity is too large, a second permanent magnet motor can be installed on the other side. A slideway hole is excavated on the inclined surface of the motor seat (11). After the gear clearance is adjusted, it is screwed and fixed to the permanent magnet motor by screws. In order to prevent the permanent magnet motor from sliding down on the inclined surface due to its weight, a stop block is installed under the tail base of the permanent magnet motor.

[0020] The large bearing support seat (13) and the small bearing support seat (14) are screwed together, and an adjustment gasket (15) is arranged between the large bearing support seat (13) and the small bearing support seat (14). When the gear clearance is adjusted, the adjustment is made by adding the adjustment gasket (15) and the screw connection is fixed after confirmation.

[0021] The rear end cover (8) of the motor is screwed to the motor housing (7), and the rear end cover (8) of the motor is screwed to the motor seat (11). A thrust bearing (9) is arranged inside the rear end cover (8) of the motor, and a bearing outer end cover (10) is arranged outside the thrust bearing (9). The thrust bearing (9) bears the axial pressure of the rotor as well as the axial positioning accuracy and stability, and the transmission torque is more stable and uniform.

[0022] The thrust bearing (9) may also be a four-point contact ball bearing, which can bear radial loads and bidirectional axial loads. A single bearing can replace two angular contact bearings for paired installation, and is suitable for bearing pure axial loads or composite loads with a large axial load component, thereby meeting the axial positioning and axial bearing requirements of the rotating shaft. The motor rear end cover (8) and the motor front end cover (12) are respectively provided with cylindrical roller bearings. The cylindrical roller bearings effectively ensure the positioning accuracy and radial force stability between the small helical gear (4) and the large gear ring (2) and between the motor stator and the rotor, thereby achieving torque transmission stability and uniformity, thereby improving the transmission efficiency and transmission effect between the large and small gears. The thrust bearing (9) cooperates with the cylindrical roller bearing to further meet the radial bearing requirements of the rotating shaft, and can meet the load-bearing capacity requirements when the axially inclined installation is met, and the defects of the existing axially inclined installation motors that are prone to bearing failure or difficult to meet the minimum preload requirements of the paired bearings will not occur.

[0023] A reducer grinding disc (3) is arranged on the vertical mill reducer (1), and a large gear ring (2) is arranged on the outer circumferential direction of the reducer grinding disc (3). The large gear ring (2) meshes with a small helical gear (4). The permanent magnet motor and the vertical mill reducer (1) are installed at a close distance and tilted, occupying a small area. Due to the influence of space, the highest point of the small helical gear (4) after installation does not exceed the plane of the reducer grinding disc (3). The small helical gear (4) installed at the motor shaft extension end drives the large gear ring (2) to drive the reducer grinding disc (3) to rotate, and the tooth force is downward. When starting, the vibration force is small and the noise is low. A cover is arranged on the side of the vertical mill reducer (1). When the equipment is running, the cover can provide appropriate structural protection for the gear, prevent the permanent magnet motor torque shaft and gears and other main functional components from being disturbed and adversely affected by the external environment, and ensure the stable and efficient operation of the permanent magnet motor, torque shaft and gears and other action components.

[0024] The basic principles, main features and advantages of the present invention are shown and described above. Without departing from the spirit and scope of the present invention, the present invention may also be subject to various changes and improvements, which are all within the scope of the present invention to be protected.

Claims

1. A structure of a helical gear vertical mill large gear for tilting a motor, comprising a vertical mill reducer (1), a small bearing support seat (14), a large bearing support seat (13), an extended cone barrel (6), a small helical gear (4), a bearing support seat (5) and a permanent magnet motor, characterized in that: The permanent magnet motor is mounted on an inclined surface of a motor seat (11) on the side of a vertical mill reducer (1). A motor front end cover (12) and a motor rear end cover (8) are respectively arranged at two ends of a motor housing (7) of the permanent magnet motor. The motor front end cover (12) is independently fixed to the motor seat (11). The motor front end cover (12) is screwed to the motor housing (7). One end of the extended cone barrel (6) is fixedly connected to the motor front end cover (12) via a flange. The other end of the extended cone barrel (6) is fixedly connected to a small bearing support seat (14). The small bearing support seat (14) is fixedly welded to an outer support of the bearing support seat (5). The lower end of the small bearing support seat (14) is fixed to the upper end of the large bearing support seat (13). The large bearing support seat (13) is fixedly connected to the motor seat (11). The output shaft of the permanent magnet motor passes through the extended cone barrel (6) and the bearing support seat (5) and is connected to a small helical gear (4).

2. The structure of a helical gear dynamic vertical grinding mill large gear for tilted motor installation according to claim 1, characterized in that: The large bearing support seat (13) is threadedly connected to the small bearing support seat (14), and an adjustment gasket (15) is provided between the large bearing support seat (13) and the small bearing support seat (14).

3. The structure of a helical gear dynamic vertical grinding mill large gear for tilted motor installation according to claim 1, characterized in that: The rear end cover (8) of the motor is screwed to the motor housing (7), and the rear end cover (8) of the motor is screwed to the motor seat (11). A thrust bearing (9) is arranged inside the rear end cover (8) of the motor, and a bearing outer end cover (10) is arranged outside the thrust bearing (9).

4. The structure of a helical gear dynamic vertical grinding mill large gear for tilted motor installation according to claim 1, characterized in that: The thrust bearing (9) may also be a four-point contact ball bearing, and cylindrical roller bearings are respectively arranged in the motor rear end cover (8) and the motor front end cover (12).

5. The structure of a helical gear dynamic vertical grinding mill large gear for tilted motor installation according to claim 1, characterized in that: A reducer grinding disc (3) is arranged on the vertical mill reducer (1), a large gear ring (2) is arranged in the outer circumferential direction of the reducer grinding disc (3), and the large gear ring (2) is meshed with a small helical gear (4).

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