A vertical mill drive system and a vertical mill

Abstract

The present invention relates to the technical field of vertical mills, and discloses a vertical mill drive system and a vertical mill. The vertical mill drive system includes a motor, an internal gear sleeve, a sun gear, and a shaft end pressing plate. The motor is provided with a motor shaft; one end of the internal gear sleeve is connected to the motor shaft through a flat key; part of the sun gear extends into the other end of the internal gear sleeve and is meshed and connected with the internal gear sleeve; an annular fixing table is arranged on the inner wall of the internal gear sleeve, and the annular fixing table is located between the sun gear and the motor shaft. The shaft end pressing plate is hermetically installed on the annular fixing table, and a sealing ring is arranged between the shaft end pressing plate and the annular fixing table. The present invention improves the efficiency of the drive system, increases the torque transmission capacity, reduces the occupied space and the overall weight; the flat key does not need to be lubricated, realizes the seal between the sun gear and the motor shaft, prevents the lubricating oil of the sun gear from entering the motor shaft, can avoid the adverse effects of the lubricating fluid on the motor, and improves the service life of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of vertical mills, and particularly to a vertical mill drive system and a vertical mill. Background Art

[0002] The vertical mill drive system is a core component of the vertical mill system and is widely used in grinding systems such as raw material vertical mills, cement vertical mills, coal vertical mills, and slag vertical mills in the building materials, power, and metallurgy industries. The original vertical mill drive system is configured with an asynchronous motor + reducer and is connected by a coupling. When the mill operates at low speed, it relies on an auxiliary transmission mechanism. The entire drive system has multiple transmission stages, low efficiency, high energy consumption, and a large volume. With the increasing market demand for high-efficiency energy-saving and automated production line configurations, the original drive system needs to be further improved and optimized. Moreover, the motor and the gearbox are connected by a spline, and the spline needs to be lubricated, resulting in difficulty in sealing between the motor and the gearbox. The lubricating oil inside the gearbox is extremely likely to leak from the connection part between the motor shaft and the planetary gear into the motor, causing damage to the motor. Therefore, under the premise of ensuring the torque transmission strength, the design of the sealing structure at this point is very important and is a key point affecting the performance of the entire system.

[0003] Based on this, there is an urgent need for a vertical mill drive system and a vertical mill to solve the above-mentioned existing problems. Summary of the Invention

[0004] Based on the above, the purpose of the present invention is to provide a vertical mill drive system and a vertical mill, which improve the efficiency of the drive system, increase the torque transmission force, reduce the occupied space and the overall weight; the flat key does not need to be lubricated, realizing the sealing between the sun gear and the motor shaft, preventing the lubricating oil of the sun gear from entering the motor shaft, and being able to avoid the adverse effects of the lubricating fluid on the motor, and improving the service life of the motor.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] On the one hand, a vertical mill drive system is provided, including:

[0007] A motor, the motor is provided with a motor shaft;

[0008] An inner gear sleeve, one end of the inner gear sleeve is connected to the motor shaft by a flat key;

[0009] A sun gear, part of the sun gear extends into the other end of the inner gear sleeve and is meshed and connected with the inner gear sleeve;

[0010] An end plate, a circular fixing platform is arranged on the inner wall of the inner gear sleeve, the circular fixing platform is located between the sun gear and the motor shaft, the end plate is sealed and installed on the circular fixing platform, and a sealing ring is arranged between the end plate and the circular fixing platform.

[0011] As a preferred technical solution of a vertical mill drive system, a gap is provided between the sun gear and the annular fixed table, and a plurality of oil leakage holes are annularly arranged on the side wall of the gap.

[0012] As a preferred technical solution of a vertical mill drive system, it further includes an oil seal pressing plate which is installed on the outer wall of the internal gear sleeve. The oil seal pressing plate is located below the oil leakage holes, and the cross section of the outer wall of the oil seal pressing plate is J-shaped and extends away from the internal gear sleeve.

[0013] As a preferred technical solution of a vertical mill drive system, a stepped surface is provided on the outer wall of the internal gear sleeve, and the oil seal pressing plate is press-fitted on the stepped surface.

[0014] As a preferred technical solution of a vertical mill drive system, it further includes a support frame. A receiving groove is provided at the bottom of the oil seal pressing plate. The support frame is fixed in the box body and annularly arranged outside the internal gear sleeve. The support frame covers the upper part of the motor, the top of the support frame extends into the receiving groove, and an oil seal is provided between the support frame and the internal gear sleeve.

[0015] As a preferred technical solution of a vertical mill drive system, the annular fixed table is provided with a mounting groove, and the shaft end pressing plate is embedded in the mounting groove. The shaft end pressing plate is connected to the annular fixed table by screws.

[0016] As a preferred technical solution of a vertical mill drive system, it further includes an upper box body. A thrust bearing and a first meshing gear pair located between the planetary gear and the internal gear ring are provided in the upper box body. A first lubricating oil path is provided in the upper box body, and the first lubricating oil path includes:

[0017] A first branch. A first oil port is provided on the outer wall of the upper box body. One end of the first branch is connected to the main branch outside the upper box body, and the other end is connected to the first oil port;

[0018] A first annular oil path is arranged inside the upper box body, and the first branch is connected to the first annular oil path;

[0019] A plurality of second branches. The plurality of second branches correspond to the plurality of thrust bearings one by one. The plurality of second branches are annularly arranged on the first annular oil path. An oil injection port is provided on the second branch, and the second branch can lubricate the thrust bearing and the first meshing gear pair.

[0020] As a preferred technical solution of a vertical mill drive system, it further includes a lower box body. A rolling bearing, a roller bearing of the planetary gear and a second meshing gear pair located between the sun gear (3) and the planetary gear are provided in the lower box body. A second lubricating oil path is provided in the upper box body, and the second lubricating oil path includes:

[0021] The third branch, a second oil port is provided on the outer wall of the lower box body, one end of the third branch is connected to the main branch, and the other end is connected to the second oil port;

[0022] The second annular oil circuit is arranged inside the lower box body, and the third branch is connected to the second annular oil circuit;

[0023] A plurality of fourth branches are arranged around the second annular oil circuit and are connected to a fifth branch inside the rolling bearing;

[0024] The fifth branch sequentially passes through the rolling bearing and the pin shaft of the planet gear, and the fifth branch can lubricate the rolling bearing, the roller bearing and the second meshing gear pair.

[0025] As a preferred technical solution of a vertical mill drive system, a third oil port is further provided on the outer wall of the upper box body, a fourth oil port and a fifth oil port are provided on the outer wall of the lower box body, the third oil port is higher than the first oil port, one end of a sixth branch is connected to the third oil port, and the other end is connected to the fourth oil port, and the fifth oil port is used for oil return.

[0026] On the other hand, a vertical mill is provided, including the vertical mill drive system described above.

[0027] The beneficial effects of the present invention are as follows:

[0028] The present invention provides a vertical mill drive system and a vertical mill. In the vertical mill drive system, the motor shaft of the motor is connected to the internal gear sleeve through a flat key, the internal gear sleeve is meshed and connected with the sun gear, and the motor directly drives the sun gear to rotate through the internal gear sleeve, improving the efficiency of the drive system, increasing the torque transmission capacity, and reducing the occupied space and the overall weight. Moreover, the motor shaft of the motor and the internal gear sleeve are connected through a flat key, and the flat key does not need to be lubricated. The shaft end pressing plate is installed on the annular fixing table inside the internal gear sleeve, and through the sealing ring, the seal between the shaft end pressing plate and the annular fixing table is realized, and then the seal between the sun gear and the motor shaft is realized, preventing the lubricating oil of the sun gear from entering the motor shaft, and avoiding the adverse effects of the lubricating liquid on the motor, and improving the service life of the motor. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the description of the embodiments of the present invention. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present invention and these drawings.

[0030] Figure 1It is a partial cross-sectional view of the vertical mill drive system provided by the specific embodiment of the present invention;

[0031] Figure 2 It is Figure 1 an enlarged view at A;

[0032] Figure 3 It is a schematic structural diagram of the vertical mill drive system provided by the specific embodiment of the present invention;

[0033] Figure 4 It is a cross-sectional view of the first lubricating oil path provided by the specific embodiment of the present invention;

[0034] Figure 5 It is a cross-sectional view of the second lubricating oil path provided by the specific embodiment of the present invention.

[0035] The markings in the figure are as follows:

[0036] 1. Motor; 11. Motor shaft; 12. Flat key; 2. Internal gear sleeve; 21. Ring-shaped fixed table; 22. Oil leakage hole; 3. Sun gear; 4. Shaft end pressing plate; 41. Sealing ring; 5. Oil seal pressing plate; 6. Support frame; 7. Oil seal; 8. Upper box body; 81. First oil port; 82. Third oil port; 83. First lubricating oil path; 831. First branch; 832. First annular oil path; 833. Second branch; 9. Lower box body; 91. Second oil port; 92. Fourth oil port; 93. Fifth oil port; 94. Second lubricating oil path; 941. Third branch; 942. Second annular oil path; 943. Fourth branch; 944. Fifth branch. Specific embodiment

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention are shown in the drawings, rather than all the structures.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0039] In the present invention, unless otherwise clearly specified or limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0040] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left" and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, 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, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] As Figure 1 and Figure 2 shown, this embodiment provides a vertical mill, which includes a vertical mill drive system. The vertical mill drive system includes a motor 1, an internal gear sleeve 2, a sun gear 3 and a shaft end pressing plate 4.

[0042] Specifically, the motor 1 is provided with a motor shaft 11; one end of the internal gear sleeve 2 is connected to the motor shaft 11 through a flat key 12; a part of the sun gear 3 extends into the other end of the internal gear sleeve 2 and is meshed and connected with the internal gear sleeve 2; an annular fixing table 21 is arranged on the inner wall of the internal gear sleeve 2, and the annular fixing table 21 is located between the sun gear 3 and the motor shaft 11. The shaft end pressing plate 4 is hermetically installed on the annular fixing table 21, and a sealing ring 41 is arranged between the shaft end pressing plate 4 and the annular fixing table 21. In the vertical mill drive system, the motor shaft 11 of the motor 1 is connected to the internal gear sleeve 2 through a flat key 12, and the torque that can be transmitted is large. The internal gear sleeve 2 is meshed and connected with the sun gear 3, and the motor 1 directly drives the sun gear 3 to rotate through the internal gear sleeve 2, improving the efficiency of the drive system, increasing the transmitted torque, and reducing the occupied space and the overall weight. Moreover, the motor shaft 11 of the motor 1 is connected to the internal gear sleeve 2 through a flat key 12, and the flat key 12 does not need lubrication. The shaft end pressing plate 4 is installed on the annular fixing table 21 inside the internal gear sleeve 2, and through the sealing ring 41, the seal between the shaft end pressing plate 4 and the annular fixing table 21 is realized, and further the seal between the sun gear 3 and the motor shaft 11 is realized, preventing the lubricating oil of the sun gear 3 from entering the motor shaft 11, being able to avoid the adverse effects of the lubricating fluid on the motor 1, and improving the service life of the motor 1.

[0043] In this embodiment, the annular fixing platform 21 is provided with a mounting groove, and the shaft end pressing plate 4 is embedded in the mounting groove. The mounting groove provides positioning for the installation of the shaft end pressing plate 4. The shaft end pressing plate 4 and the annular fixing platform 21 are connected by screws to achieve detachable connection between the two.

[0044] Preferably, a gap is provided between the sun gear 3 and the annular fixing platform 21, and a plurality of oil leakage holes 22 are annularly arranged on the side wall of the gap. The part where the sun gear 3 meshes with the internal gear sleeve 2 is located inside the gearbox. After the lubricating oil meshes with the part where the sun gear 3 meshes with the internal gear sleeve 2, it flows into the gap, and then through the centrifugal force during rotation, the lubricating oil in the gap is discharged from the internal gear sleeve 2 through the oil leakage holes 22 to prevent the accumulation of lubricating oil in the gap.

[0045] This embodiment also provides an external lubrication solution for the internal gear sleeve 2. The vertical mill drive system further includes an oil seal pressing plate 5. The oil seal pressing plate 5 is installed on the outer wall of the internal gear sleeve 2. The oil seal pressing plate 5 is located below the oil leakage holes 22. The cross-section of the outer wall of the oil seal pressing plate 5 is J-shaped and extends away from the internal gear sleeve 2. The J-shaped outer wall can divert the lubricating oil above the oil seal pressing plate 5 away from the central axis of the motor 1 to prevent the lubricating oil from flowing into the motor 1 along the outer wall of the internal gear sleeve 2. Preferably, a stepped surface is provided on the outer wall of the internal gear sleeve 2, and the oil seal pressing plate 5 is press-fitted on the stepped surface to prevent the oil seal pressing plate 5 from moving downward, and the stepped surface provides positioning for the installation of the oil seal pressing plate 5.

[0046] Furthermore, the vertical mill drive system further includes a support frame 6. A receiving groove is provided at the bottom of the oil seal pressing plate 5. The support frame 6 is fixed inside the box and annularly arranged outside the internal gear sleeve 2. The support frame 6 covers the upper part of the motor 1, and the top of the support frame 6 extends into the receiving groove. An oil seal 7 is provided between the support frame 6 and the internal gear sleeve 2 to achieve sealing between the support frame 6 and the internal gear sleeve 2. The support frame 6 can isolate the motor 1 and the gearbox. The provision of the receiving groove can prevent the lubricating oil above and on the side of the support frame 6 from flowing into the inner wall side of the support frame 6, achieving a primary isolation. The provision of the oil seal 7 achieves a secondary isolation to prevent the lubricating oil in the gearbox from flowing into the motor 1.

[0047] Even further, as Figure 3 and Figure 4As shown, the vertical mill drive system further includes an upper housing 8. Inside the upper housing 8, there are multiple thrust bearings and a first meshing gear pair located between the planetary gear and the internal gear ring. A first lubricating oil path 83 is provided inside the upper housing 8. The first lubricating oil path 83 includes a first branch 831, a first annular oil path 832, and a second branch 833. An first oil port 81 is provided on the outer wall of the upper housing 8. One end of the first branch 831 is connected to the main branch outside the upper housing 8, and the other end is connected to the first oil port 81; the first annular oil path 832 is arranged inside the upper housing 8, and the first branch 831 is connected to the first annular oil path 832; multiple second branches 833 correspond to the multiple thrust bearings one by one. The multiple second branches 833 are arranged around the first annular oil path 832. An oil injection port is provided on the second branch 833. The second branch 833 can lubricate the thrust bearing and the first meshing gear pair. The lubricating oil enters the first branch 831 through the main branch, then flows through the first annular oil path 832 and the second branch 833, and finally the lubricating oil is sprayed out through the oil injection port of the second branch 833 to achieve lubrication of the thrust bearing and the first meshing gear pair.

[0048] As Figure 1 , Figure 3 and Figure 5 shown, the vertical mill drive system further includes a lower housing 9. Inside the lower housing 9, there are rolling bearings, roller bearings of the planetary gear, and a second meshing gear pair located between the sun gear 3 and the planetary gear. A second lubricating oil path 94 is provided inside the upper housing 8. The second lubricating oil path 94 includes a third branch 941, a second annular oil path 942, a fourth branch 943, and a fifth branch 944. A second oil port 91 is provided on the outer wall of the lower housing 9. One end of the third branch 941 is connected to the main branch, and the other end is connected to the second oil port 91; the second annular oil path 942 is arranged inside the lower housing 9, and the third branch 941 is connected to the second annular oil path 942; multiple fourth branches 943 are arranged around the second annular oil path 942 and are connected to the fifth branch 944 inside the rolling bearing; the fifth branch 944 sequentially passes through the rolling bearing and the pin shaft of the planetary gear. The fifth branch 944 can lubricate the rolling bearing, the roller bearing, and the second meshing gear pair. The lubricating oil enters the third branch 941 through the main branch, then flows through the second annular oil path 942, the fourth branch 943, and the fifth branch 944, and finally the lubricating oil is sprayed out through the fifth branch 944 to achieve lubrication of the rolling bearing, the roller bearing, and the second meshing gear pair.

[0049] Preferably, a third oil port 82 is further provided on the outer wall of the upper box body 8, and a fourth oil port 92 and a fifth oil port 93 are provided on the outer wall of the lower box body 9. The third oil port 82 is higher than the first oil port 81. One end of the sixth branch is connected to the third oil port 82, and the other end is connected to the fourth oil port 92. The fifth oil port 93 is used for oil return. When there is more lubricating oil in the upper box body 8, it can overflow through the third oil port 82, flow back into the lower box body 9 through the sixth branch, and finally the lower box body 9 returns oil through the fifth oil port 93.

[0050] Note that the above is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A vertical mill drive system, characterized in that, it includes: a motor (1), and a motor shaft (11) is provided on the motor (1); an internal gear sleeve (2), one end of the internal gear sleeve (2) is connected to the motor shaft (11) through a flat key (12); a sun gear (3), a part of the sun gear (3) extends into the other end of the internal gear sleeve (2) and is meshed and connected with the internal gear sleeve (2); a shaft end pressing plate (4), an annular fixing platform (21) is provided on the inner wall of the internal gear sleeve (2), the annular fixing platform (21) is located between the sun gear (3) and the motor shaft (11), the shaft end pressing plate (4) is sealed and installed on the annular fixing platform (21), and a sealing ring (41) is provided between the shaft end pressing plate (4) and the annular fixing platform (21); a gap is provided between the sun gear (3) and the annular fixing platform (21), and a plurality of oil leakage holes (22) are annularly arranged on the side wall of the gap; an oil seal pressing plate (5), the oil seal pressing plate (5) is installed on the outer wall of the internal gear sleeve (2), the oil seal pressing plate (5) is located below the oil leakage holes (22), and the cross section of the outer wall of the oil seal pressing plate (5) is J-shaped and extends away from the internal gear sleeve (2); an upper box body (8), a plurality of thrust bearings and a first meshing gear pair located between the planet gear and the internal gear ring are provided in the upper box body (8), and a first lubricating oil path (83) is provided in the upper box body (8), and the first lubricating oil path (83) includes: a first branch (831), a first oil port (81) is provided on the outer wall of the upper box body (8), one end of the first branch (831) is connected to the main branch outside the upper box body (8), and the other end is connected to the first oil port (81); a first annular oil path (832), which is arranged inside the upper box body (8), and the first branch (831) is connected to the first annular oil path (832); a plurality of second branches (833), the plurality of second branches (833) correspond to the plurality of thrust bearings one by one, the plurality of second branches (833) are annularly arranged on the first annular oil path (832), an oil injection port is provided on the second branch (833), and the second branch (833) can lubricate the thrust bearing and the first meshing gear pair.

2. The vertical mill drive system according to claim 1, characterized in that, a stepped surface is provided on the outer wall of the internal gear sleeve (2), and the oil seal pressing plate (5) is installed on the stepped surface by interference fit.

3. The vertical mill drive system according to claim 1, characterized in that, it further includes a support frame (6), a receiving groove is provided at the bottom of the oil seal pressing plate (5), the support frame (6) is fixed in the box body and is annularly arranged outside the internal gear sleeve (2), the support frame (6) covers the upper part of the motor (1), the top of the support frame (6) extends into the receiving groove, and an oil seal (7) is provided between the support frame (6) and the internal gear sleeve (2).

4. The vertical mill drive system according to claim 1, characterized in that, The annular fixing table (21) is provided with a mounting groove, the shaft end pressing plate (4) is embedded in the mounting groove, and the shaft end pressing plate (4) is connected to the annular fixing table (21) by screws.

5. The vertical mill drive system according to claim 1, characterized in that it further comprises a lower box body (9), a rolling bearing, a roller bearing of the planetary gear and a second meshing gear pair located between the sun gear (3) and the planetary gear are arranged in the lower box body (9), and a second lubricating oil path (94) is arranged in the upper box body (8), and the second lubricating oil path (94) comprises: a third branch (941), a second oil port (91) is arranged on the outer wall of the lower box body (9), one end of the third branch (941) is connected to the main branch, and the other end is connected to the second oil port (91); a second annular oil path (942), which is arranged inside the lower box body (9), and the third branch (941) is connected to the second annular oil path (942); a plurality of fourth branches (943), the plurality of fourth branches (943) are arranged around the second annular oil path (942) and are connected to a fifth branch (944) inside the rolling bearing; the fifth branch (944) sequentially passes through the rolling bearing and the pin shaft of the planetary gear, and the fifth branch (944) can lubricate the rolling bearing, the roller bearing and the second meshing gear pair.

6. The vertical mill drive system according to claim 5, characterized in that a third oil port (82) is further arranged on the outer wall of the upper box body (8), a fourth oil port (92) and a fifth oil port (93) are arranged on the outer wall of the lower box body (9), the third oil port (82) is higher than the first oil port (81), one end of a sixth branch is connected to the third oil port (82), and the other end is connected to the fourth oil port (92), and the fifth oil port (93) is used for oil return.

7. A vertical mill, characterized in that it comprises the vertical mill drive system according to any one of claims 1-6.

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