A lengthened shaft motor direct drive vertical mill speed reducer structure

Abstract

The utility model discloses a kind of lengthened shaft motor direct-drive vertical mill speed reducer structures, including driving assembly, transmission assembly and helical tooth big gear ring, driving assembly includes motor casing, stator, rotor, bearing and the rotor shaft of rotor integration, transmission assembly includes pinion, bearing tile seat, lengthened shaft, lengthened shaft one end passes through bearing tile seat and is connected with pinion, pinion is engaged with helical tooth big gear ring, the other end of lengthened shaft is fixedly connected with rotor shaft by connecting flange, the front end cover of rotor shaft outer periphery motor casing is set up guide pulley device, guide pulley device includes guide pulley support and guide pulley upper;The shaft end of synchronous motor and transmission assembly share a bearing, avoid the drawbacks that motor sets up three point support, easy to damage bearing, guide pulley device is designed, guide pulley device plays the role of adjusting gap during motor factory test and motor assembly lengthened shaft debugging, guide pulley in guide pulley device plays auxiliary role when motor works.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical mill drive, and specifically relates to a structure of a vertical mill speed reducer directly driven by a motor with an extended shaft. Background Technique

[0002] At the present stage, domestic cement production lines are gradually developing towards large-scale and large-sized, and at the same time, with the continuous improvement of environmental protection requirements, the demand for the treatment of slag, water slag and steel slag grinding powder has also increased accordingly; as an important operating equipment for the grinding powder working condition, vertical mills meet the supporting construction requirements of large-scale dry-process cement production lines and slag grinding lines. In order to install and use a synchronous motor with a relatively high power factor, high efficiency and obvious power saving to drive the vertical mill to work, it is an irresistible trend to adopt a structure of a vertical mill speed reducer directly driven by a motor with an extended shaft.

[0003] The overall external dimension of the speed reducer equipment supporting the vertical mill is relatively large, and the equipment weight is overweight, resulting in great difficulties in operations such as hoisting, transportation, maintenance and spatial layout. During the working process, a large number of manual equipment are required to participate, and the cost is relatively high;

[0004] During the working process of the speed reducer equipment supporting the vertical mill, after the motor is installed, its output shaft is usually horizontally arranged. However, when the vertical mill works, the rotation axis of the grinding table is perpendicular to the horizontal plane. Therefore, a complex transmission structure is required for transmission. During the transmission process, due to the use of multiple transmission structures for transmission, the power loss of the motor will be relatively large, affecting the economy of the vertical mill operation; by adopting a synchronous motor and changing the transmission ratio through a gear structure, the motor specifications required for driving the vertical mill can be greatly reduced, the motor cost can be reduced, and a relatively large torque can be obtained to ensure smooth operation.

[0005] The motor shaft needs to be extended to a certain length to meet the requirements of the installation structure. The continuous extension of the motor shaft results in the deflection and rigidity of the extended shaft not meeting the actual requirements, leading to the occurrence of shaft breakage; some manufacturers add a set of bearings outside the motor body to form a three-point support. The processing accuracy requirements of the three-point support are high, and it is also very difficult to meet the requirements. The bearings are severely worn and easily damaged, and the concentricity is not good, resulting in shaft breakage; it cannot meet the actual use requirements, so there is an urgent need for improved technologies in the market to solve the above problems. Content of the Utility Model

[0006] The technical problem to be solved by the utility model is to overcome the existing defects and provide a structure of a vertical mill speed reducer directly driven by a motor with an extended shaft. The bearing at the load end of the synchronous motor is moved outwards, and the extended shaft is connected through a connecting flange. The extended shaft extends to install the bearing at the bearing seat position of the pinion gear close to the torque output, which can effectively solve the problems in the background technique.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a direct-drive vertical mill reducer structure with an extended shaft motor, comprising a drive assembly, a transmission assembly, and a helical gear ring. The drive assembly includes a motor housing, a stator, a rotor, bearings, and a rotor shaft integrated with the rotor. The transmission assembly includes a pinion, a bearing housing, and an extended shaft. One end of the extended shaft passes through the bearing housing and connects to the pinion. The pinion meshes with the helical gear ring. The other end of the extended shaft is fixedly connected to the rotor shaft via a connecting flange. A guide wheel device is provided on the front end cover of the motor housing on the outer periphery of the rotor shaft. The guide wheel device includes a guide wheel bracket and a guide wheel. The guide wheel bracket is screwed onto the outside of the front end cover, and the guide wheel is movably mounted on the guide wheel bracket via a pin.

[0008] Furthermore, the guide wheel device is set into three groups, which are evenly arranged around the center of the front cover.

[0009] Furthermore, the two bearings in the motor housing are respectively set as a rear bearing and a front bearing. The front bearing is set in the bearing housing near the pinion end, and the rear bearing is set in the bearing chamber of the end cover at the tail end of the motor housing.

[0010] Furthermore, a grinding disc is installed above the reducer housing, a thrust bearing is installed below the grinding disc, a large helical gear ring is installed on the outer periphery of the grinding disc, and the pinion and the large helical gear ring are combined to form bevel teeth or spiral bevel teeth.

[0011] Furthermore, the bearing housing is screwed onto the workbench, the workbench is welded and fixed to the side of the reducer housing, and the motor housing is fixed to the motor base.

[0012] Furthermore, several wing ribs are welded around the circumference of the extended shaft.

[0013] Furthermore, the base, reducer housing, and worktable are respectively bolted to the ground.

[0014] A cover is provided around the large helical gear ring, and the cover is screwed onto the circumference of the reducer housing. Inside the cover are oil injection and oil collection components.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The shaft end of the synchronous motor and the transmission assembly share a single bearing, which avoids the disadvantage of the motor having three-point support, which is prone to bearing damage. A guide wheel device is designed. The guide wheel device plays a role in adjusting the clearance during the motor's factory test and the motor assembly and shaft extension debugging. The guide wheel in the guide wheel device plays an auxiliary role when the motor is working.

[0017] 2. The extended shaft design solves the problem of long-distance driving and also addresses the issue of synchronous motors not being able to be equipped with three-point lubrication support. Opening the connecting flange facilitates the installation, debugging, assembly, and maintenance of the transmission components, thus enabling the widespread application of this technology for direct-drive vertical mills with synchronous motors. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] In the diagram: 1 Motor base, 2 Motor housing, 3 Guide wheel, 4 Guide wheel bracket, 5 Connecting flange, 6 Workbench, 7 Reducer housing, 8 Thrust bearing, 9 Grinding disc, 10 Helical gear ring, 11 Pinion, 12 Bearing housing, 13 Extended shaft, 14 Front end cover, 15 Rotor shaft, 16 Stator, 17 Rotor, 18 Rear bearing, 19 Front bearing. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Please see Figure 1This utility model provides a technical solution: a structure for a direct-drive vertical mill reducer with an extended shaft motor, including a drive assembly, a transmission assembly, and a helical gear ring 10. The drive assembly includes a motor housing 2, a stator 16, a rotor 17, a bearing 18, and a rotor shaft 15 integrated with the rotor 17. The transmission assembly includes a pinion 11, a bearing housing 12, and an extended shaft 13. One end of the extended shaft 13 passes through the bearing housing 12 and connects to the pinion 11. Due to the limited installation height of the vertical mill reducer, and the fact that the synchronous motor has a relatively large diameter and needs to be located away from the center of the vertical mill via the extended shaft 13, the extended shaft 13 solves the problem of long-distance drive and also solves the problem that the synchronous motor cannot be equipped with three-point lubrication support. The extended shaft 13 end of the synchronous motor shares a bearing with the transmission assembly, reducing the cost of setting multiple bearings between the drive assembly and the transmission assembly. Opening the connecting flange 5 facilitates the installation, debugging, assembly, and maintenance of the transmission assembly. This technology for direct-drive vertical mills with synchronous motors has achieved widespread application. The pinion 11 and... The helical gear ring 10 meshes with the extended shaft 13. The other end of the extended shaft 13 is fixedly connected to the rotor shaft 15 via a connecting flange 5. Both the rotor shaft 15 and the extended shaft 13 are provided with flanges that mate with each other. The flanges are perforated on their outer circumference and fixed with bolts. The two flanges have concentric frustum-shaped male and female fasteners. A guide wheel device is provided on the front end cover 14 of the motor housing 2 on the outer circumference of the rotor shaft 15. The guide wheel device plays a role in adjusting the clearance during the motor factory test and the motor assembly and debugging of the extended shaft 13. The guide wheel 3 in the guide wheel device plays a role in the operation of the motor. The auxiliary guide wheel device includes a guide wheel bracket 4 and a guide wheel 3. The guide wheel bracket 4 is screwed onto the outside of the front end cover 14, and the guide wheel 3 is movably mounted on the guide wheel bracket 4 via a pin. Specifically, under the condition of ensuring the natural clearance between the front end cover 14 and the rotor shaft 15, the guide wheel bracket 4 is screwed onto the outside of the rotor shaft 15, and the guide wheel 3 is movably mounted inside the guide wheel bracket 4 via a pin. The guide wheel device 120 degrees can be arranged at three points around the circumference of the front end cover 14. The anti-pin retraction technology is a known technology and will not be described in detail.

[0022] The guide wheel device is set in three groups, and the guide wheel device is evenly arranged around the center of the front cover 14.

[0023] The two bearings in the motor housing 2 are respectively set as rear bearing 18 and front bearing 19. The front bearing 19 is set in the bearing housing 12 near the end of the pinion 11, and the rear bearing 18 is set in the bearing chamber of the end cover at the tail end of the motor housing 2. The shaft end of the synchronous motor and the transmission assembly share a bearing, which avoids the disadvantage of setting the motor with three-point support, which is easy to damage the bearing.

[0024] A grinding disc 9 is installed above the reducer housing 7, and a thrust bearing 8 is installed below the grinding disc 9. A helical gear ring 10 is installed on the outer periphery of the grinding disc 9. The pinion 11 and the helical gear ring 10 are combined to form bevel teeth or spiral bevel teeth. The load of the grinding disc 9 is loaded onto the thrust bearing 8, and the thrust bearing 8 is loaded onto the motor housing 2 of the vertical mill reducer.

[0025] The bearing housing 12 is screwed onto the workbench 6. The workbench 6 is welded and fixed to the side of the reducer housing 7. The motor housing 2 is fixed onto the motor base 1.

[0026] Several ribs are welded around the circumference of the extended shaft 13 to enhance its deflection and rigidity.

[0027] The reducer housing 7 and the worktable 6 are respectively bolted to the ground.

[0028] A cover is provided around the large helical gear ring 10. The cover is screwed onto the circumference of the reducer housing 7. Inside the cover are oil injection and oil collection components.

[0029] The foregoing has shown and described the basic principles, main features and advantages of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A structure for a direct-drive vertical mill reducer with an extended shaft motor, comprising a drive assembly, a transmission assembly, and a helical gear ring (10), characterized in that: The drive assembly includes a motor housing (2), a stator (16), a rotor (17), a bearing (18), and a rotor shaft (15) integral with the rotor (17). The transmission assembly includes a pinion (11), a bearing housing (12), and an extension shaft (13). One end of the extension shaft (13) passes through the bearing housing (12) and is connected to the pinion (11). The pinion (11) meshes with a helical gear ring (10). The other end of the extension shaft (13) is fixedly connected to the rotor shaft (15) through a connecting flange (5). A guide wheel device is provided on the front end cover (14) of the motor housing (2) around the rotor shaft (15). The guide wheel device includes a guide wheel bracket (4) and a guide wheel (3). The guide wheel bracket (4) is screwed onto the outside of the front end cover (14), and the guide wheel (3) is movably mounted on the guide wheel bracket (4) through a pin.

2. The structure of the extended shaft motor direct drive vertical mill reducer according to claim 1, characterized in that: The guide wheel device is set in three groups, and the guide wheel device is evenly arranged around the center of the front cover (14).

3. The structure of the extended shaft motor direct drive vertical mill reducer according to claim 1, characterized in that: The two bearings in the motor housing (2) are respectively set as a rear bearing (18) and a front bearing (19). The front bearing (19) is located in the bearing housing (12) near the pinion (11), and the rear bearing (18) is located in the bearing chamber of the end cover at the tail end of the motor housing (2).

4. The structure of the extended shaft motor direct drive vertical mill reducer according to claim 1, characterized in that: A grinding disc (9) is provided above the reducer housing (7), and a thrust bearing (8) is provided below the grinding disc (9). A helical gear ring (10) is provided on the outer periphery of the grinding disc (9). The pinion (11) and the helical gear ring (10) are combined to form bevel teeth or spiral bevel teeth.

5. The structure of the extended shaft motor direct drive vertical mill reducer according to claim 1, characterized in that: The bearing housing (12) is screwed onto the workbench (6), and the workbench (6) is welded to the side of the reducer housing (7). The motor housing (2) is fixed on the motor base (1).

6. The structure of the extended shaft motor direct drive vertical mill reducer according to claim 1, characterized in that: Several wing ribs are welded around the circumference of the extended shaft (13).

7. The structure of the extended shaft motor direct drive vertical mill reducer according to claim 5, characterized in that: The motor base (1), the reducer housing (7) and the worktable (6) are respectively screwed to the ground.

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