Shell structure for permanent magnet semi-direct driving force transmission system of vertical mill

Abstract

The utility model discloses a shell structure for a permanent magnet semi-direct driving force transmission system of a vertical mill, which comprises a shell, an inner cavity of the shell is provided with an integrated seat, the upper end of the integrated seat is provided with an annular groove for mounting a planetary gear reducer, the lower end of the integrated seat is provided with an annular convex groove for mounting a rotor, and the annular groove is communicated with the annular convex groove. A stator matched with the rotor in an electromagnetic induction mode is installed on the inner wall, close to the annular convex groove, of the shell. According to the vertical mill, the permanent magnet motor and the planetary gear speed reducer can be integrally installed in the same shell, namely, the permanent magnet motor and the planetary gear speed reducer are compactly arranged to improve the integration level, so that the installation space of a power transmission system is saved, and then the installation space of the whole vertical mill is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical mills, and more specifically to a shell structure for a permanent magnet semi-direct drive power transmission system of a vertical mill. Background Art

[0002] Vertical roller mill, also known as vertical mill, is a kind of equipment used for grinding cement raw materials, cement clinker, slag and coal cinder.

[0003] The existing vertical mill permanent magnet semi-direct drive power transmission system is mainly composed of a permanent magnet motor and a few-stage planetary gear reducer, and the two are respectively assembled in two independent housings. The rotor in the permanent magnet motor passes through the opposite end walls of the two housings in turn to connect the planetary gear reducer. The rotor needs to be longer, resulting in a non-compact structure of the permanent magnet motor and the planetary gear reducer, which also makes the power transmission system structure non-compact, resulting in a larger installation space for the power transmission system.

[0004] In summary, how to solve the problem that the existing vertical mill power transmission system has a non-compact structure and a large installation space is an urgent problem to be solved by technical personnel in this field. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a housing structure for a permanent magnet semi-direct drive power transmission system of a vertical mill, wherein the housing structure can integrate a permanent magnet motor and a planetary gear reducer to save installation space of the power transmission system.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A housing structure for a permanent magnet semi-direct drive power transmission system of a vertical mill comprises a housing, an inner cavity of the housing is provided with an integrated seat, an upper end of the integrated seat is provided with an annular groove for mounting a planetary gear reducer, and a lower end is provided with an annular convex groove for mounting a rotor, and the annular groove is communicated with the annular convex groove, and an inner wall of the housing adjacent to the annular convex groove is used for mounting a stator that cooperates with the rotor through electromagnetic induction.

[0008] Preferably, the annular groove and the annular convex groove are coaxially arranged with the shell.

[0009] Preferably, the shell includes an upper shell and a lower shell with openings at both ends, the two are coaxially arranged up and down, and the integrated seat is connected between the opposite ends of the upper shell and the lower shell to form an integrated structure.

[0010] Preferably, the lower end of the upper shell is integrally formed with the integrated seat, and the upper end of the lower shell is detachably connected to the integrated seat, or the upper end of the lower shell is welded to the integrated seat.

[0011] Preferably, the outer diameters of the upper shell and the integrated seat are consistent, and the outer diameters of both are larger than the outer diameter of the lower shell.

[0012] Preferably, an oil storage cylinder is nested inside the upper shell, and the oil storage cylinder and the integrated seat form a sealed lubricating oil cavity;

[0013] The first side end of the integrated seat is provided with an oil supply hole, and the second side end of the integrated seat is provided with an oil return hole, and the oil supply hole and the oil return hole are both used to connect the lubricating oil cavity with the oil supply device;

[0014] A main oil supply passage is provided at the first side end of the integrated seat, and the oil supply hole is connected to the annular groove and the annular convex groove through the main oil supply passage;

[0015] A main oil return passage is provided at the second side end of the integrated seat, and the oil return hole is connected with the annular groove and the annular convex groove through the main oil return passage.

[0016] Preferably, the main oil supply channel includes a first oil supply channel and a second oil supply channel arranged vertically, the first oil supply channel is placed in the integrated seat and connects the oil supply hole and the annular groove, the second oil supply channel is bent, and its two parts are respectively placed in the groove walls of the integrated seat and the annular convex groove and connect the oil supply hole and the annular convex groove.

[0017] Preferably, the main oil return channel is bent, and its two parts are respectively placed in the groove walls of the integrated seat and the annular convex groove and connect the oil return hole and the annular convex groove, and the bending part of the main oil return channel is connected to the groove bottom of the annular groove.

[0018] Preferably, the inner wall of the lower shell is provided with a cooling water channel arranged around its circumference, a spiral baffle is provided in the cooling water channel, and the upper shell is provided with a cooling water inlet flange and a cooling water outlet flange in sequence from top to bottom, both of which are connected to the cooling water channel.

[0019] Preferably, the outer wall of the lower shell is provided with a plurality of hanging plates evenly arranged around the outer wall of the lower shell.

[0020] The utility model provides a shell structure for a permanent magnet semi-direct drive power transmission system of a vertical mill, wherein an integrated seat is arranged in the inner cavity of the shell, and an annular groove and an annular convex groove are arranged at the upper end and the lower end of the integrated seat respectively, which are interconnected, so that the planetary gear reducer can be installed in the annular groove, and the rotor of the permanent magnet motor is installed in the annular convex groove, one end of the rotor extends into the annular groove to be connected to the planetary gear reducer, and the other end cooperates with the electromagnetic induction of the stator located on the inner wall of the shell. It can be seen that the rotor of the permanent magnet motor and the planetary gear reducer are integrated and placed on the integrated seat of the same shell, which can reduce the length of the rotor to improve the integration of the planetary gear reducer and the permanent magnet motor, thereby saving the installation space of the power transmission system, and further saving the installation space of the vertical mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of a housing structure for a permanent magnet semi-direct drive power transmission system of a vertical mill provided by the utility model;

[0023] Figure 2 The utility model provides a schematic diagram of the assembly of a housing structure and power transmission components for a permanent magnet semi-direct drive power transmission system of a vertical mill.

[0024] Reference numerals:

[0025] 1-upper shell; 2-lower shell; 3-integrated seat; 4-annular groove; 5-annular convex groove; 6-oil storage cylinder; 7-sealing ring; 8-observation hole; 9-oil supply hole; 10-oil return hole; 11-first oil supply channel; 12-second oil supply channel; 13-main oil return channel; 14-connecting flange; 15-support rib plate; 16-cooling water channel; 17-spiral baffle; 18-mounting flange plate; 19-cooling water inlet flange; 20-cooling water outlet flange; 21-hanging plate; 22-planetary gear reducer; 23-stator; 24-rotor; 25-rotor bearing; 26-axial vibration sensor; 27-platinum thermal resistor; 28-radial vibration sensor. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The core of the utility model is to provide a shell structure for a permanent magnet semi-direct drive power transmission system of a vertical mill, and the shell structure can integrate a permanent magnet motor and a planetary gear reducer to save the installation space of the power transmission system.

[0028] It should be noted that, in the present embodiment, the directions or positional relationships indicated by “upper”, “lower”, “front”, “back”, etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application.

[0029] Please refer to Figure 1 and Figure 2 The present application provides a shell structure for a permanent magnet semi-direct drive power transmission system of a vertical mill, including a shell, an inner cavity of the shell is provided with an integrated seat 3, the upper end of the integrated seat 3 is provided with an annular groove 4 for installing a planetary gear reducer 22, and the lower end is provided with an annular convex groove 5 for installing a rotor 24, and the annular groove 4 is connected to the annular convex groove 5, and the inner wall of the shell adjacent to the annular convex groove 5 is used to install a stator 23 that cooperates with the rotor 24 for electromagnetic induction.

[0030] It should be noted that the integrated seat 3 is arranged in the inner cavity of the shell, and a downwardly recessed annular groove 4 is arranged at the upper end of the integrated seat 3. The bottom of the planetary gear reducer 22 is fixed in the annular groove 4. The lower end of the integrated seat 3 is provided with a downwardly protruding annular convex groove 5. A rotor bearing 25 is generally arranged in the annular convex groove 5. One end of the rotor 24 can be rotatably inserted into the rotor bearing 25, and the relative groove bottoms of the annular groove 4 and the annular convex groove 5 are both open and interconnected, so that the rotor 24 passes through the annular convex groove 5 and the groove bottom of the annular groove 4 to be transmission-connected with the planetary gear reducer 22, and the other end of the rotor 24 extends out of the notch of the annular convex groove 5 to cooperate with the stator 23 located on the inner wall of the shell for electromagnetic induction.

[0031] Therefore, compared with the existing two independent shells in which the permanent magnet motor and the planetary gear reducer 22 are respectively set, the present application can integrate the permanent magnet motor and the planetary gear reducer 22 into the same shell, that is, the permanent magnet motor and the planetary gear reducer 22 are compactly arranged to improve the integration, thereby saving the installation space of the power transmission system, and further saving the installation space of the vertical mill.

[0032] Preferably, a mounting groove for mounting the stator 23 is provided on the inner wall of the housing adjacent to and below the annular convex groove 5, so that the stator 23 and the rotor 24 of the permanent magnet motor are compactly arranged, which can further save the installation space of the power transmission system.

[0033] Based on the above examples, please refer to Figure 1 , the annular groove 4 and the annular convex groove 5 are coaxially arranged with the housing. It can be understood that the planetary gear reducer 22 is installed in the annular groove 4, the rotor 24 of the permanent magnet motor is installed in the annular convex groove 5, and the stator 23 is installed on the inner wall of the housing around the circumference of the housing. The annular groove 4, the annular convex groove 5 and the housing are coaxial, even if the planetary gear reducer 22, the rotor 24 and the stator 23 run coaxially, it is beneficial to improve the transmission efficiency, operation accuracy and reliability of the power transmission system.

[0034] Considering the specific structure of the housing, based on the above embodiments, please refer to Figure 1 The shell includes an upper shell 1 and a lower shell 2 with openings at both ends. The two are coaxially arranged up and down, and an integrated seat 3 is connected between the opposite ends of the upper shell 1 and the lower shell 2 to form an integrated structure.

[0035] Specifically, the upper shell 1 and the lower shell 2 are both annular ribs with sufficient structural strength. The integrated seat 3 is connected between the opposite open ends of the upper shell 1 and the lower shell 2 to form an integrated shell, thereby ensuring the strength of the shell to stably support the planetary gear reducer 22 and the permanent magnet motor.

[0036] Taking into account the specific connection method between the upper shell 1 and the lower shell 2, on the basis of the above embodiment, the lower end of the upper shell 1 is integrally formed with the integrated seat 3, and the upper end of the lower shell 2 is detachably connected to the integrated seat 3, or the upper end of the lower shell 2 is welded to the integrated seat 3.

[0037] Specifically, the lower end of the upper shell 1 is integrally formed with the integrated seat 3, which can improve the structural stability of the integrated seat 3. In one embodiment, the upper end of the lower shell 2 is welded to the integrated seat 3 as a whole, so that the integrated seat 3 can be firmly installed on the lower shell 2, which can further improve the structural stability of the integrated seat 3, and greatly ensure that the planetary gear reducer 22 and the permanent magnet motor are stably installed in the shell; in another embodiment, the upper end of the lower shell 2 is detachably connected to the lower end of the integrated seat 3 through the connecting flange 14, which can facilitate the installation and removal of the parts inside the shell. It should be noted that the parts installed inside the shell include, in addition to the rotor 24 and the stator 23 of the permanent magnet motor, a platinum thermal resistor 27 and a radial vibration sensor 28 both placed on the outer groove wall of the annular convex groove 5. The platinum thermal resistor 27 is used to detect the temperature of the rotor 24, and the radial vibration sensor 28 is used to detect the radial vibration amplitude of the integrated seat 3. In addition, an axial vibration sensor 26 is set at the side end of the integrated seat 3 located outside the shell to detect the axial vibration amplitude of the integrated seat 3, so as to know the operation of the equipment.

[0038] Optionally, a supporting rib 15 is provided between the lower end of the integrated seat 3 and the outer groove wall of the annular convex groove 5 to further enhance the structural stability of the integrated seat 3 .

[0039] In addition, the integrated seat 3, the upper shell 1 and the lower shell 2 can be coaxially arranged, which can prevent the integrated seat 3 from being tilted on the upper shell 1 and the lower shell 2 brackets, thereby facilitating the integrated seat 3 and the upper shell 1 The integrated structure formed by the structure is smoothly installed on the lower shell 2.

[0040] It should be noted that, in addition to the planetary gear reducer 22 , the upper housing 1 also has a power output component and a lubricating oil assembly that are transmission-connected to the planetary gear reducer 22 . Therefore, compared with the lower housing 2 , the upper housing 1 requires a larger radial space.

[0041] In order to make the upper shell 1 have a larger radial space than the lower shell 2, based on the above embodiment, please refer to Figure 1 The outer diameters of the upper shell 1 and the integrated seat 3 are consistent, and the outer diameters of the two are larger than the outer diameter of the lower shell 2.

[0042] To ensure the smooth operation of the power transmission system, please refer to the Figure 1 and Figure 2An oil storage cylinder 6 is nested inside the upper shell 1, and the oil storage cylinder 6 and the integrated seat 3 form a sealed lubricating oil cavity; an oil supply hole 9 is provided at the first side end of the integrated seat 3, and an oil return hole 10 is provided at the second side end of the integrated seat 3, and the oil supply hole 9 and the oil return hole 10 are both used to connect the lubricating oil cavity with the oil supply device; a main oil supply channel is provided at the first side end of the integrated seat 3, and the oil supply hole 9 connects the annular groove 4 and the annular convex groove 5 through the main oil supply channel; a main oil return channel 13 is provided at the second side end of the integrated seat 3, and the oil return hole 10 connects the annular groove 4 and the annular convex groove 5 through the main oil return channel 13.

[0043] It should be noted that the lower end of the oil storage cylinder 6 is installed on the upper end of the integrated seat 3, and a sealing ring 7 is provided on the upper end of the oil storage cylinder 6. The sealing ring 7 is sealed with the power output component, so that a lubricating oil cavity is formed between the side wall of the oil storage cylinder 6, the sealing ring 7 and the integrated seat 3. The oil supply hole 9 is connected to the oil outlet end of the oil supply device, and the oil return hole 10 is connected to the oil return end of the oil supply device, and the oil return end of the oil supply device is provided with a filter for filtering the refluxed lubricating oil.

[0044] In this way, the oil supply device pumps the lubricating oil to the oil supply hole 9, part of the lubricating oil enters the annular groove 4 and the annular convex groove 5 through the main oil supply channel to lubricate the gear and the rotor bearing 25, and the other part of the lubricating oil directly enters the lubricating oil cavity to lubricate the power output components, thereby reducing the transmission friction of the power transmission system and ensuring the smooth and stable operation of the power transmission system. The oil supply device provides suction force to the main oil return channel 13 through the oil return hole 10, so that the lubricating oil in the annular groove 4 and the annular convex groove 5 flows back to the oil supply device through the main oil return channel 13 and the oil return hole 10 in turn, and also makes the lubricating oil in the lubricating oil cavity flow back to the oil supply device through the oil return hole 10. The refluxed lubricating oil is filtered and cooled by the oil supply device and can be used for subsequent lubrication.

[0045] Optionally, since the annular groove 4 and the annular convex groove 5 are connected, the two can share a main oil supply passage for oil inlet, and the main oil supply passage is arranged in the integrated seat 3, one end of which is connected to the oil supply hole 9, and the other end extends to the junction of the annular groove 4 and the annular convex groove 5, that is, the two opposite groove bottom openings of the annular groove 4 and the annular convex groove 5 and is connected, so as to lubricate the gear and the rotor bearing 25. The main oil supply passage arranged with the above structure is simple in structure and easy to process.

[0046] The structure of the main oil supply passage is further optimized to improve the oil immersion lubrication degree of the gear and the rotor 24. On the basis of the above embodiment, the main oil supply passage includes a first oil supply passage 11 and a second oil supply passage 12 arranged up and down. The first oil supply passage 11 is placed in the integrated seat 3 and connects the oil supply hole 9 with the annular groove 4. The second oil supply passage 12 is bent, and its two parts are respectively placed in the groove walls of the integrated seat 3 and the annular convex groove 5 and connect the oil supply hole 9 with the annular convex groove 5.

[0047] Specifically, Figure 2 As shown, the main oil supply passage is composed of two oil passages, namely the first oil supply passage 11 and the second oil supply passage 12. One end of the first oil supply passage 11 is connected to the oil supply hole 9, and the other end extends along the radial direction of the integrated seat 3, that is, the radial direction of the shell to the groove wall of the annular groove 4 and communicates with the inside of the annular groove 4, thereby realizing the internal communication between the oil supply hole 9 and the annular groove 4. The second oil supply passage 12 is located below the first oil supply passage 11. The second oil supply passage 12 is composed of a cross pipe section and a vertical pipe section that intersect each other. One end of the cross pipe section is connected to the oil supply hole 9, and the other end extends along the radial direction of the integrated seat 3 to the groove wall of the annular convex groove 5. The vertical pipe section is L-shaped and placed in the groove wall of the annular convex groove 5. The upper part of the vertical pipe section is connected to the other end of the cross pipe section, and the lower part is connected to the inside of the annular convex groove 5, thereby realizing the internal communication between the oil supply hole 9 and the annular convex groove 5. In this way, the lubricating oil in the oil supply hole 9 flows through three flow paths. The first flow path is that the lubricating oil directly enters the lubricating oil cavity to lubricate the power output components with oil. The second flow path is that the lubricating oil enters the annular groove 4 with the planetary gear reducer 22 through the first oil supply passage 11 to lubricate the gears of the planetary gear reducer 22 with oil. The third flow path is that the lubricating oil enters the annular groove 4 with the rotor bearing 25 through the second oil supply passage 12 to lubricate the rotor bearing 25 with oil. Therefore, the use of the above two oil passages to form the main oil supply passage can ensure that sufficient lubricating oil is supplied to the annular groove 4 and the annular convex groove 5 to fully lubricate the gears and the rotor 24, thereby further ensuring the smooth operation of the power transmission system.

[0048] Preferably, Figure 2 As shown, the bending part of the second oil supply passage 12 is connected with the bottom of the annular groove 4. Specifically, the vertical pipe section of the second oil supply passage 12 extends upward to the bottom of the annular groove 4 and is connected with the interior of the annular groove 4, so that after the lubricating oil flowing into the annular groove 4 wets the gear to form an oil film, the excess lubricating oil will pass through the vertical pipe section of the second oil passage into the annular convex groove 5 to wet the rotor bearing 25, so as to make full use of the lubricating oil.

[0049] The structure of the main oil return channel 13 is further optimized to achieve a reasonable and ingenious oil circuit layout and facilitate processing. On the basis of the above embodiment, the main oil return channel 13 is bent, and its two parts are respectively placed in the groove walls of the integrated seat 3 and the annular convex groove 5 and connect the oil return hole 10 with the annular convex groove 5, and the bending part of the main oil return channel 13 is connected to the groove bottom of the annular groove 4.

[0050] Specifically, Figure 2As shown, the main oil return channel 13 is also composed of a cross pipe section and a vertical pipe section that intersect each other. One end of the cross pipe section is connected to the oil return hole 10, and the other end extends to the groove wall of the annular convex groove 5 along the radial direction of the integrated seat 3. The vertical pipe section is L-shaped and is placed in the groove wall of the annular convex groove 5. The upper part of the vertical pipe section is connected to the other end of the cross pipe section, and the lower part is connected to the inside of the annular convex groove 5, so as to realize the internal connection between the oil return hole 10 and the annular convex groove 5. In addition, the vertical pipe section extends upward to the groove bottom of the annular groove 4 and is connected to the inside of the annular groove 4. In this way, the lubricating oil in the annular groove 4 and the annular convex groove 5 are all collected in the oil return hole 10 through the main oil return channel 13, and then the lubricating oil containing impurities that has been heated is returned to the oil supply device through the oil return hole 10 for filtering and cooling treatment. As can be seen from the above, by reasonably arranging the main oil return channel 13, the lubricating oil in the annular convex groove 5 and the annular groove 4 is fully returned to the oil supply device, which not only realizes the full recycling of the lubricating oil, but also reduces the processing of the oil channel.

[0051] Optionally, an observation hole 8 is provided on the side wall of the upper shell 1, and the observation hole 8 is covered with a transparent plate to achieve sealing of the upper shell 1 while facilitating observation of the operation of the planetary gear reducer 22 inside the shell.

[0052] To achieve cooling of the permanent magnet motor, based on the above embodiments, please refer to Figure 1 The inner wall of the lower shell 2 is provided with a cooling water channel 16 arranged around its circumference, a spiral stopper 17 is provided in the cooling water channel 16, and the upper shell 1 is provided with a cooling water inlet flange 19 and a cooling water outlet flange 20 in sequence from top to bottom, both of which are connected to the cooling water channel 16.

[0053] Specifically, the upper end of the lower shell 2 is provided with a connecting flange 14, and the lower end is provided with a mounting flange plate 18. The cooling water channel 16 is placed between the connecting flange 14 and the mounting flange plate 18, and is arranged around the circumference of the lower shell 2 and close to the inner wall of the lower shell 2. The cooling water channel 16 is composed of two layers of steel cylinders with different diameters, and a spiral stopper 17 is welded in the inner cavity of the cooling water channel 16 to guide the reciprocating flow of cooling water to take away the heat generated by the permanent magnet motor. The upper part of the lower shell 2 is provided with a cooling water inlet flange 19, and the lower part is provided with a cooling water outlet flange 20. The cooling water inlet flange 19 and the cooling water outlet flange 20 are connected to the cooling system through pipelines, and are used to circulate cooling water to the cooling water channel 16.

[0054] Preferably, the outer wall of the lower shell 2 is provided with a plurality of hanging plates 21 evenly arranged around the circumference thereof to facilitate hanging of the shell structure.

[0055] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0056] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0057] The above is a detailed introduction to the shell structure of the permanent magnet semi-direct drive power transmission system for the vertical mill provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A housing structure for a vertical mill permanent magnet semi-direct drive power transmission system, characterized in that: The invention comprises a shell, wherein an inner cavity of the shell is provided with an integrated seat (3), an upper end of the integrated seat (3) is provided with an annular groove (4) for mounting a planetary gear reducer (22), and a lower end of the integrated seat (3) is provided with an annular convex groove (5) for mounting a rotor (24), wherein the annular groove (4) is communicated with the annular convex groove (5), and an inner wall of the shell adjacent to the annular convex groove (5) is used for mounting a stator (23) that cooperates with the rotor (24) by electromagnetic induction.

2. The housing structure for the permanent magnet semi-direct drive power transmission system of a vertical mill according to claim 1 is characterized in that: The annular groove (4) and the annular convex groove (5) are coaxially arranged with the housing.

3. The housing structure for the permanent magnet semi-direct drive power transmission system of a vertical mill according to claim 1 is characterized in that: The shell comprises an upper shell (1) and a lower shell (2) both ends of which are open, the two being coaxially arranged up and down, and the integrated seat (3) is connected between the opposite ends of the upper shell (1) and the lower shell (2) to form an integrated structure.

4. The housing structure for the vertical mill permanent magnet semi-direct drive power transmission system according to claim 3 is characterized in that: The lower end of the upper shell (1) is integrally formed with the integrated seat (3), and the upper end of the lower shell (2) is detachably connected to the integrated seat (3), or the upper end of the lower shell (2) is welded to the integrated seat (3).

5. The housing structure for the permanent magnet semi-direct drive power transmission system of a vertical mill according to claim 4 is characterized in that: The outer diameters of the upper shell (1) and the integrated seat (3) are consistent, and the outer diameters of both are greater than the outer diameter of the lower shell (2).

6. The housing structure for the vertical mill permanent magnet semi-direct drive power transmission system according to claim 5 is characterized in that: An oil storage cylinder (6) is nested inside the upper shell (1), and the oil storage cylinder (6) and the integrated seat (3) form a sealed lubricating oil cavity; An oil supply hole (9) is provided at a first side end of the integrated seat (3), and an oil return hole (10) is provided at a second side end of the integrated seat (3), wherein the oil supply hole (9) and the oil return hole (10) are both used to connect the lubricating oil cavity with the oil supply device; A main oil supply passage is provided at the first side end of the integrated seat (3), and the oil supply hole (9) is connected to the annular groove (4) and the annular convex groove (5) through the main oil supply passage; A main oil return passage (13) is provided at the second side end of the integrated seat (3), and the oil return hole (10) is connected to the annular groove (4) and the annular convex groove (5) through the main oil return passage (13).

7. The housing structure for the vertical mill permanent magnet semi-direct drive power transmission system according to claim 6, characterized in that: The main oil supply passage comprises a first oil supply passage (11) and a second oil supply passage (12) arranged in an upper and lower manner, wherein the first oil supply passage (11) is disposed in the integrated seat (3) and communicates with the oil supply hole (9) and the annular groove (4), and the second oil supply passage (12) is in a bent shape, and two parts thereof are respectively disposed in the groove wall of the integrated seat (3) and the annular convex groove (5) and communicate with the oil supply hole (9) and the annular convex groove (5).

8. The housing structure for the vertical mill permanent magnet semi-direct drive power transmission system according to claim 6, characterized in that: The main oil return passage (13) is in a bent shape, and its two parts are respectively placed in the groove wall of the integrated seat (3) and the annular convex groove (5) and communicate with the oil return hole (10) and the annular convex groove (5), and the bent part of the main oil return passage (13) is communicated with the groove bottom of the annular groove (4).

9. The housing structure for the vertical mill permanent magnet semi-direct drive power transmission system according to claim 3, characterized in that: The inner wall of the lower shell (2) is provided with a cooling water channel (16) arranged around the circumference thereof, a spiral stopper (17) is provided in the cooling water channel (16), and the upper shell (1) is provided with a cooling water inlet flange (19) and a cooling water outlet flange (20) in sequence from top to bottom, both of which are connected to the cooling water channel (16).

10. The housing structure for the vertical mill permanent magnet semi-direct drive power transmission system according to any one of claims 3 to 9, characterized in that: The outer wall of the lower shell (2) is provided with a plurality of hanging plates (21) evenly arranged around the circumference thereof.

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