Permanent magnet driving system of integrated roller press

Abstract

The utility model discloses an integrated roller press permanent magnet driving system in the field of roller press driving systems, which comprises a permanent magnet motor shell, a reduction gearbox body, a permanent magnet motor arranged in the permanent magnet motor shell and a planetary reduction structure arranged in the reduction gearbox body, the permanent magnet motor shell and the reduction gearbox body are both of a cylindrical structure and are coaxially and fixedly connected, one end of the reduction gearbox body is provided with a bearing installation base, the bearing installation base is located in the permanent magnet motor shell, and an input shaft of the planetary speed reduction structure coaxially penetrates through the bearing installation base and is rotationally connected to the bearing installation base through a first rolling bearing. A motor rotor of the permanent magnet motor is fixedly connected to the input shaft. The permanent magnet motor, the planetary gear box and the frequency converter are highly integrated into an integral transmission system structure, energy is saved, consumption is reduced, the structure is compact, the installation space is saved, and the efficiency of the system is effectively improved.

Description

Technical Field

[0001] This utility model relates to the technical field of roller press drive systems, and in particular to an integrated permanent magnet drive system for roller presses. Background Technology

[0002] Roller presses are high-efficiency grinding equipment with significant energy-saving and production-increasing effects. They are widely used in mining, building materials, and other fields. Their working principle involves using two grinding rollers rotating at equal speeds but relatively slow to apply pressure to the material, crushing and pulverizing it. Due to their working characteristics, the requirements for the transmission system are quite stringent. Traditional roller press power transmission systems consist of four parts: a high-voltage asynchronous motor, a coupling, a roller press gearbox, and a lubrication device. The entire system is relatively complex and suffers from problems such as a high failure rate, low system efficiency, and high maintenance costs.

[0003] Currently, the roller press transmission industry has begun to use permanent magnet motor drive solutions. Based on the original transmission system, the high-voltage asynchronous motor is replaced with a permanent magnet motor, and the number of transmission stages in the gearbox is reduced. However, this permanent magnet motor drive solution has a low degree of integration, large installation space, and poor system stability, resulting in insufficient core technological competitiveness. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a highly integrated permanent magnet drive system for a roller press.

[0005] To solve the above-mentioned technical problems, the integrated permanent magnet drive system for the roller press provided by this utility model adopts the following technical solution:

[0006] An integrated permanent magnet drive system for a roller press includes a permanent magnet motor housing, a gearbox housing, a permanent magnet motor disposed within the permanent magnet motor housing, and a planetary reduction gear structure disposed within the gearbox housing. Both the permanent magnet motor housing and the gearbox housing are cylindrical structures and are coaxially fixedly connected. One end of the gearbox housing is a bearing mounting seat, which is located inside the permanent magnet motor housing. The input shaft of the planetary reduction gear structure coaxially passes through the bearing mounting seat and is rotatably connected to the bearing mounting seat via a first rolling bearing. The motor rotor of the permanent magnet motor is fixedly connected to the input shaft.

[0007] By adopting the above technical solution, the input shaft is rotatably connected to the bearing mounting seat. After the bearing mounting seat, input shaft, and motor rotor are connected, they form a cantilever support structure. The bearing mounting seat can provide axial support and radial fixation for the input shaft and motor rotor, making full use of the motor's internal space, reducing the overall system length, and bringing the system's center of gravity closer to the roller press. The entire machine can be directly cantilevered onto the roller press shaft. Compared with traditional roller press gearboxes, this integrated design uses a shared housing for the permanent magnet motor and gearbox, and eliminates the need for traditional couplings. The entire machine can be directly cantilevered onto the roller press shaft, saving installation space and resulting in a more compact structure. It also eliminates the need for the original motor foundation, allowing for the replacement of the original foundation of the traditional roller press drive system and saving installation space.

[0008] By integrating the permanent magnet motor and planetary gearbox into a single transmission system structure, the collaborative work between various components of the drive system is optimized, system redundancy is reduced, system efficiency is improved, and system stability is enhanced. Furthermore, by using a permanent magnet synchronous motor instead of a traditional high-voltage asynchronous motor, the gear transmission structure reduces one stage of parallel transmission compared to the traditional roller press gearbox, resulting in higher transmission efficiency and an overall energy saving rate of 5-15%.

[0009] Optionally, the motor rotor is fixedly provided with a mounting bracket, which is then fitted and fixedly installed on the input shaft. The motor rotor, the mounting bracket, and the input shaft are all arranged along the same central axis.

[0010] By adopting the above technical solution, the motor rotor and input shaft can be stably connected and fixed by the mounting bracket, and a cantilever support structure can be formed between the motor rotor and input shaft, so that the transmission between the motor rotor and output shaft is more stable and reliable.

[0011] Optionally, the input shaft is provided with a boss in the circumferential direction, and the mounting bracket and the boss are positioned by a stop.

[0012] By adopting the above technical solution, the radial positioning of the mounting bracket on the input shaft is achieved through the stop fit between the mounting bracket and the boss.

[0013] Optionally, there are two first rolling bearings, both of which are sleeved on the input shaft. The inner wall of the bearing mounting seat is provided with a protrusion. The input shaft is sleeved and threaded with a nut. One of the first rolling bearings is clamped between the boss and the protrusion, and the other first rolling bearing is clamped between the protrusion and the nut.

[0014] By adopting the above technical solution, one of the first rolling bearings is limited and supported by the boss and the protrusion, and the other first rolling bearing is limited and supported by the protrusion and the nut, so that the two first rolling bearings can stably support the rotation of the input shaft; at the same time, it makes the installation and removal of the first rolling bearings relative to the bearing mounting part more convenient, so as to facilitate processing.

[0015] Optionally, the planetary reduction structure is a two-stage planetary reduction structure, wherein both the first-stage internal gear ring and the second-stage internal gear ring of the planetary reduction structure are fixed to the gearbox housing, the first-stage sun gear of the planetary reduction structure is fixedly mounted on the input shaft, and the second-stage sun gear of the planetary reduction structure is fixedly mounted on the first-stage planetary shaft.

[0016] By adopting the above technical solution, power is input through a first-stage sun gear, and after passing through two stages of planetary deceleration and torque amplification, power is output through a second-stage planetary carrier to achieve a sufficient reduction ratio.

[0017] Optionally, the gearbox housing includes a front housing, a middle housing, and a rear housing that are fixedly arranged in sequence. The front housing is fixed to the permanent magnet motor housing, the bearing mounting seat is arranged in the front housing, the first-stage internal gear ring is fixedly arranged between the front housing and the middle housing, the second-stage internal gear ring is fixedly arranged between the middle housing and the rear housing, and the second-stage planetary carrier of the planetary reduction structure is rotatably connected to both the middle housing and the rear housing.

[0018] By adopting the above technical solution, compared to machining the primary and secondary internal gear rings into the interior of the overall gearbox, dividing the gearbox into a front, middle, and rear housing, and clamping and fixing the primary and secondary internal gear rings using the front, middle, and rear housings, the convenience of fixing and installing the internal gear rings can be improved. Furthermore, the outer diameter of the gearbox housing can be further reduced, making the drive system structure more compact and reducing its weight, thus further saving installation space.

[0019] Optionally, an output sealing component is provided between the secondary planetary carrier and the rear housing.

[0020] By adopting the above technical solution, the output sealing component can seal the lubricating medium inside the gearbox housing and prevent external dust from entering the gearbox housing and damaging the planetary reduction structure.

[0021] Optionally, an input sealing component is provided between the bearing mounting base and the input shaft, the input sealing component being used to prevent the lubricating medium inside the gearbox from flowing into the permanent magnet motor housing.

[0022] By adopting the above technical solution, the input sealing component can prevent the lubricating medium inside the gearbox from leaking into the permanent magnet motor, thus avoiding operational problems of the permanent magnet motor.

[0023] Optionally, a fan blade is provided circumferentially at the end of the input shaft away from the gearbox.

[0024] By adopting the above technical solution, as the motor rotor rotates, the fan blades can generate circulating air inside the permanent magnet motor housing, thereby improving the cooling conditions of the permanent magnet motor.

[0025] Optionally, a frequency converter is integrated outside the housing of the permanent magnet motor, and the frequency converter is electrically connected to the control terminal of the permanent magnet motor.

[0026] By adopting the above technical solution, the permanent magnet motor, planetary gearbox, and frequency converter are highly integrated into a single transmission system structure, resulting in energy saving, reduced consumption, and a compact structure. Using frequency converter drive, smooth transmission remains possible even under low load and large load fluctuation conditions, and intelligent control can adjust the output speed to a reasonable range according to changes in load and output.

[0027] Optionally, the outer peripheral wall of the bearing mounting base is provided with reinforcing ribs.

[0028] In summary, this utility model has at least one of the following beneficial technical effects:

[0029] 1. Compared with the traditional roller press gearbox, it adopts an integrated design, with the permanent magnet motor and gearbox sharing part of the housing, and does not require a traditional coupling. The whole machine can be directly cantilevered on the roller press shaft, saving installation space. The structure is more compact, and the original motor foundation is no longer required. It can replace the original foundation of the traditional roller press drive system, saving installation space.

[0030] 2. By integrating the permanent magnet motor, planetary gearbox, and frequency converter into a single transmission system structure, the coordinated operation between the various components of the drive system is optimized, system redundancy is reduced, system efficiency is improved, and system stability is enhanced.

[0031] 3. Furthermore, a permanent magnet synchronous motor is used instead of the traditional high-voltage asynchronous motor. Compared with the traditional roller press gearbox, the gear transmission structure reduces one stage of parallel transmission, resulting in higher transmission efficiency and an overall energy saving rate of 5-15%. Attached Figure Description

[0032] Figure 1 This is a structural schematic diagram of the integrated permanent magnet drive system for a roller press, which is used to demonstrate the structure of the system.

[0033] Explanation of reference numerals in the attached drawings: 1. Inverter; 2. Permanent magnet motor housing; 3. Motor stator; 4. Motor rotor; 5. Mounting bracket; 6. Heat sink; 7. Input shaft; 8. Input sealing component; 9. First rolling bearing; 10. Round nut; 11. Front housing; 12. Middle housing; 13. Second rolling bearing; 14. Rear housing; 15. Third rolling bearing; 16. Output sealing component; 17. Locking disc; 18. Second-stage planetary carrier; 19. Second-stage planetary shaft; 20. Fourth rolling bearing; 21. Second-stage planetary gear; 22. Second-stage internal gear ring; 23. Second-stage sun gear; 24. First-stage planetary carrier; 25. First-stage planetary shaft; 26. First-stage sun gear; 27. Fifth rolling bearing; 28. First-stage planetary gear; 29. ​​First-stage internal gear ring. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1 The present invention will be described in further detail below.

[0035] This utility model discloses an integrated permanent magnet drive system for a roller press. (Refer to...) Figure 1 The integrated permanent magnet drive system of the roller press includes a permanent magnet motor housing 2, a gearbox housing, a permanent magnet motor and a planetary reduction structure. The permanent magnet motor is installed inside the permanent magnet motor housing 2, and the planetary reduction structure is installed inside the gearbox housing.

[0036] Reference Figure 1 Both the permanent magnet motor housing 2 and the gearbox housing are cylindrical structures and coaxially fixedly connected. A mounting position for the frequency converter 1 is provided on the outside of the permanent magnet motor housing 2, allowing for integrated installation of the frequency converter 1. The frequency converter 1 is electrically connected to the control terminal of the permanent magnet motor. Driven by the frequency converter 1, smooth transmission is maintained even under low load and large load fluctuation conditions. Intelligent control adjusts the output speed to a reasonable range according to changes in load output. A bearing mounting seat is provided along the edge of the opening at the end of the gearbox housing facing the permanent magnet motor housing 2. The bearing mounting seat is coaxial with the gearbox housing. Reinforcing ribs are provided on the outer peripheral wall of the bearing mounting seat.

[0037] Reference Figure 1 The permanent magnet motor includes a motor stator 3 and a motor rotor 4. The motor stator 3 is fixedly installed on the inner wall of the permanent magnet motor housing 2 and is arranged on the same central axis as the permanent magnet motor housing 2. The motor rotor 4 is located inside the motor stator 3 and is arranged on the same central axis as the motor stator 3.

[0038] Reference Figure 1The planetary reduction structure is a two-stage planetary reduction structure, comprising an input shaft 7, a first-stage internal gear ring 29, a first-stage planetary carrier 24, a first-stage planetary gear 28, a first-stage planetary shaft 25, a first-stage sun gear 26, a second-stage internal gear ring 22, a second-stage planetary carrier 18, a second-stage planetary gear 21, a second-stage planetary shaft 19, and a second-stage sun gear 23. The input shaft 7 passes through a bearing mounting seat and is coaxially aligned with it. A first rolling bearing 9 is installed between the input shaft 7 and the bearing mounting seat, allowing the input shaft 7 to rotate relative to the bearing mounting seat. The motor rotor 4 is sleeved and fixedly mounted on the input shaft 7, and the motor rotor 4 is aligned with the central axis of the input shaft 7. One end of the input shaft 7 within the gearbox housing is an internal spline end, and one end of the first-stage sun gear 26 is an external spline end. The external spline end of the first-stage sun gear 26 is inserted into and meshes with the internal spline end of the input shaft 7.

[0039] Reference Figure 1 The first-stage internal gear ring 29 and the second-stage internal gear ring 22 are fixedly installed on the inner wall of the gearbox housing and are arranged on the same central axis as the gearbox housing. The first-stage sun gear 26 is coaxially inserted through the first-stage gear ring. The first-stage planetary gear 28 meshes with both the first-stage sun gear 26 and the first-stage internal gear ring 29. The first-stage planetary gear 28 is coaxially inserted through the first-stage planetary gear 28 and is rotatably connected to the first-stage planetary gear 28 through the fifth rolling bearing 27. The first-stage planetary carrier 24 is fixedly connected to the first-stage planetary shaft 25 and is coaxially inserted with the first-stage internal gear ring 29. The secondary sun gear 23 is connected to the primary planetary carrier 24 via a spline and is aligned with the same central axis. The secondary sun gear 23 passes through the secondary gear ring along the same central axis. The secondary planetary gear 21 meshes with both the primary sun gear 26 and the secondary internal gear ring 22. The secondary planetary gear 21 passes coaxially through the secondary planetary gear 26 and is rotatably connected to the secondary planetary gear 26 via the fifth rolling bearing 27. The secondary planetary carrier 18 is fixedly connected to the secondary planetary shaft 19 and is aligned with the secondary internal gear ring 22 along the same central axis. The secondary planetary carrier 18 is rotatably connected to the gearbox housing via the second rolling bearing 13 and the third rolling bearing 15. The meshing method of the above gear system is NGW type. Power is input through the primary sun gear 26, and after torque amplification through two stages of planetary reduction, power is output through the secondary planetary carrier 18. A locking disc 17 is provided on the secondary planetary carrier 18 for fixing the secondary planetary carrier 18 to the roller shaft of the roller press.

[0040] The input shaft 7 is rotatably connected to the bearing mounting seat via the first rolling bearing 9. The bearing mounting seat, input shaft 7, and motor rotor 4, when connected, form a cantilever support structure. The bearing mounting seat provides axial support and radial fixation for the input shaft 7 and motor rotor 4, fully utilizing the internal space of the motor, reducing the overall system length, and bringing the system's center of gravity closer to the roller press. The entire machine can be directly cantilevered onto the roller press shaft. Compared to traditional roller press gearboxes, this integrated design uses a shared housing for the permanent magnet motor and gearbox, eliminating the need for traditional couplings. The entire machine can be directly cantilevered onto the roller press shaft, saving installation space and resulting in a more compact structure. It also eliminates the need for the original motor foundation, allowing for the replacement of the original foundation of the traditional roller press drive system and saving installation space.

[0041] By integrating the permanent magnet motor and planetary gearbox into a single transmission system structure, the collaborative work between various components of the drive system is optimized, system redundancy is reduced, system efficiency is improved, and system stability is enhanced. Furthermore, by using a permanent magnet synchronous motor instead of a traditional high-voltage asynchronous motor, the gear transmission structure reduces one stage of parallel transmission compared to the traditional roller press gearbox, resulting in higher transmission efficiency and an overall energy saving rate of 5-15%.

[0042] Reference Figure 1 The gearbox housing includes a front housing 11, a middle housing 12, and a rear housing 14. The front housing 11 is fixed to the permanent magnet motor housing 2, and a bearing mounting seat is located at the end of the front housing 11 facing the permanent magnet motor housing 2. A primary internal gear ring 29 is bolted to the end of the front housing 11 away from the permanent magnet motor housing 2. The middle housing 12 is bolted to the end of the primary internal gear ring 29 away from the front housing 11. A secondary internal gear ring 22 is bolted to the middle housing 12, and the rear housing 14 is bolted to the secondary internal gear ring 22. The front housing 11, primary internal gear ring 29, middle housing 12, secondary internal gear ring 22, and rear housing 14 are all arranged along the same central axis. A secondary planetary carrier 18 is rotatably connected to the middle housing 12 via a second rolling bearing 13 and rotatably connected to the rear housing 14 via a third rolling bearing 15.

[0043] Compared to machining the primary internal gear ring 29 and the secondary internal gear into the interior of the overall gearbox, dividing the gearbox housing into a front housing 11, a middle housing 12, and a rear housing 14, and clamping and fixing the primary internal gear ring 29 and the secondary internal gear ring 22 through the front housing 11, the middle housing 12, and the rear housing 14, can improve the convenience of fixing and installing the internal gear ring, and can further reduce the outer diameter of the gearbox housing, making the drive system structure more compact and reducing its weight, thus further saving installation space.

[0044] Reference Figure 1To better seal the lubricating oil inside the gearbox, an output sealing component 16 is provided between the secondary planetary carrier 18 and the rear housing 14. The output sealing component 16 includes an end cap and a skeleton oil seal. The output sealing component 16 can seal the lubricating medium inside the gearbox and prevent external dust from entering the gearbox and damaging the planetary reduction structure. An input sealing component 8 is provided between the bearing mounting seat and the input shaft 7. The input sealing component 8 includes an end cap and a skeleton oil seal. The input sealing component 8 can prevent the lubricating medium inside the gearbox from leaking into the permanent magnet motor, avoiding operational problems of the permanent magnet motor.

[0045] Reference Figure 1 To ensure a more stable fixation of the motor rotor 4 to the input shaft 7, a mounting bracket 5 is fixedly installed on the motor rotor 4. The mounting bracket 5 is fitted onto and bolted to the input shaft 7. The motor rotor 4, mounting bracket 5, and input shaft 7 are all aligned with the same central axis. A boss is provided circumferentially on the input shaft 7, and the mounting bracket 5 and the boss are positioned using a stop.

[0046] The mounting bracket 5 and the boss's stop fit together to achieve radial positioning of the mounting bracket 5 on the input shaft 7; the mounting bracket 5 can stably connect and fix the motor rotor 4 and the input shaft 7, and can form a cantilever support structure between the motor rotor 4 and the input shaft 7, so that the transmission between the motor rotor 4 and the output shaft is more stable and reliable.

[0047] Reference Figure 1 There are two first rolling bearings 9, both of which are fitted onto the input shaft 7. The inner wall of the bearing mounting base has a protrusion. A nut is threaded onto the outer sleeve of the input shaft 7. One first rolling bearing 9 is clamped between the boss and the protrusion, and the other is clamped between the protrusion and the nut. The boss and protrusion limit and support one first rolling bearing 9, and the protrusion and nut limit and support the other first rolling bearing 9, allowing the two first rolling bearings 9 to stably support the rotation of the input shaft 7. This also makes the installation and removal of the first rolling bearings 9 relative to the bearing mounting base more convenient, facilitating machining.

[0048] Reference Figure 1 The input shaft 7 is circumferentially equipped with fan blades at the end away from the gearbox. As the motor rotor 4 rotates, the fan blades can generate circulating air inside the permanent magnet motor housing 2, improving the cooling conditions of the permanent magnet motor.

[0049] The implementation principle of the integrated permanent magnet drive system for a roller press according to this utility model embodiment is as follows: The input shaft 7 is rotatably connected to the bearing mounting seat through the first rolling bearing 9. After the bearing mounting seat, the input shaft 7, and the motor rotor 4 are connected, they form a cantilever support structure. The bearing mounting seat can provide axial support and radial fixation for the input shaft 7 and the motor rotor 4, making full use of the internal space of the motor, reducing the overall system length, and bringing the system center of gravity closer to the roller press. The whole machine can be directly cantilevered and installed on the roller press shaft. Compared with the traditional roller press gearbox, the integrated design, with the permanent magnet motor and gearbox sharing part of the housing, eliminates the need for a traditional coupling. The whole machine can be directly cantilevered and installed on the roller press shaft, saving installation space, making the structure more compact, and eliminating the need for the original motor foundation. This allows for the replacement of the original foundation of the traditional roller press drive system, saving installation space.

[0050] By integrating the permanent magnet motor, planetary gearbox, and frequency converter into a single transmission system structure, the collaborative work between the various components of the drive system is optimized, system redundancy is reduced, system efficiency is improved, and system stability is enhanced. Furthermore, by using a permanent magnet synchronous motor instead of a traditional high-voltage asynchronous motor, the gear transmission structure reduces the number of parallel transmission stages compared to the traditional roller press gearbox, resulting in higher transmission efficiency and an overall energy saving rate of 5-15%.

[0051] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. An integrated permanent magnet drive system for a roller press, characterized in that: The device includes a permanent magnet motor housing (2), a gearbox housing, a permanent magnet motor housed in the permanent magnet motor housing (2), and a planetary reduction gear structure housed in the gearbox housing. The permanent magnet motor housing (2) and the gearbox housing are both cylindrical structures and are coaxially fixedly connected. One end of the gearbox housing is a bearing mounting seat, which is located inside the permanent magnet motor housing (2). The input shaft (7) of the planetary reduction gear structure coaxially passes through the bearing mounting seat and is rotatably connected to the bearing mounting seat through a first rolling bearing (9). The motor rotor (4) of the permanent magnet motor is fixedly connected to the input shaft (7).

2. The integrated permanent magnet drive system for a roller press according to claim 1, characterized in that: The motor rotor (4) is fixedly provided with a mounting bracket (5), which is sleeved and fixedly installed on the input shaft (7). The motor rotor (4), the mounting bracket (5) and the input shaft (7) are all arranged on the same central axis.

3. The integrated permanent magnet drive system for a roller press according to claim 2, characterized in that: The input shaft (7) is provided with a boss in the circumferential direction, and the mounting bracket (5) is positioned with the boss by a stop.

4. The integrated permanent magnet drive system for a roller press according to claim 3, characterized in that: There are two first rolling bearings (9). Both first rolling bearings (9) are sleeved on the input shaft (7). The inner wall of the bearing mounting seat is provided with a protrusion. The input shaft (7) is sleeved and threaded with a nut. One of the first rolling bearings (9) is clamped between the boss and the protrusion, and the other first rolling bearing (9) is clamped between the protrusion and the nut.

5. The integrated permanent magnet drive system for a roller press according to claim 1, characterized in that: The planetary reduction structure is a two-stage planetary reduction structure. The first-stage internal gear ring (29) and the second-stage internal gear ring (22) of the planetary reduction structure are both fixed to the gearbox housing. The first-stage sun gear (26) of the planetary reduction structure is fixedly installed on the input shaft (7), and the second-stage sun gear (23) of the planetary reduction structure is fixedly installed on the first-stage planetary shaft (25).

6. The integrated permanent magnet drive system for a roller press according to claim 5, characterized in that: The gearbox housing includes a front housing (11), a middle housing (12), and a rear housing (14) that are fixedly arranged in sequence. The front housing (11) is fixed to the permanent magnet motor housing (2). The bearing mounting seat is arranged in the front housing (11). The first-stage internal gear ring (29) is fixedly arranged between the front housing (11) and the middle housing (12). The second-stage internal gear ring (22) is fixedly arranged between the middle housing (12) and the rear housing (14). The second-stage planetary carrier (18) of the planetary reduction structure is rotatably connected to both the middle housing (12) and the rear housing (14).

7. The integrated permanent magnet drive system for a roller press according to claim 6, characterized in that: An output sealing component (16) is provided between the secondary planetary carrier (18) and the rear housing (14).

8. The integrated permanent magnet drive system for a roller press according to claim 1, characterized in that: An input sealing component (8) is provided between the bearing mounting base and the input shaft (7). The input sealing component (8) is used to prevent the lubricating medium in the gearbox housing from flowing into the permanent magnet motor housing (2).

9. The integrated permanent magnet drive system for a roller press according to claim 1, characterized in that: The input shaft (7) has fan blades arranged circumferentially at the end away from the gearbox.

10. The integrated permanent magnet drive system for a roller press according to claim 1, characterized in that: The permanent magnet motor housing (2) is equipped with an integrated frequency converter (1), which is electrically connected to the control terminal of the permanent magnet motor.

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