CN221058136U - Built-in permanent magnet planetary electric roller - Google Patents

Abstract

A built-in permanent magnet planetary electric roller comprises a large-torque permanent magnet planetary gear motor, a roller support frame and a hollow shaft; the roller is arranged on the roller supporting frame, the hollow shaft is coaxially arranged in the roller, and the high-torque permanent magnet planetary reduction motor is arranged in the hollow shaft; the high-torque permanent magnet planetary reduction motor comprises a motor and a planetary gear reducer, and the output end of the motor is connected with the planetary gear reducer; the motor comprises a motor shell, a stator and a rotor assembly; the stator is arranged inside the motor shell, and the rotor assembly is arranged inside the stator. According to the utility model, the high-speed motor and the planetary reducer with a large reduction ratio are integrated into a whole, so that the high-power-density integrated speed reducing motor with a brand new structure is formed, and the speed reducing motor is integrated with the inside of the roller by utilizing the characteristics of small volume and large torque density of the speed reducing motor, so that the occupied space of the whole roller system is greatly reduced, the space requirement of the electric roller is greatly reduced, and the manufacturing cost is reduced.

Description

Built-in permanent magnet planetary electric roller

Technical Field

The utility model relates to the field of belt conveyors, in particular to a built-in permanent magnet planetary electric roller.

Background

At present, the main driving mode in the field of belt conveyors is that an external three-phase asynchronous motor is decelerated through a cylindrical gear reducer to directly drive a roller to rotate, and the roller drives a belt to move so as to realize the conveying of materials.

Disclosure of utility model

The utility model aims to provide a built-in permanent magnet planetary electric roller, which aims to solve the problems that a three-phase asynchronous motor and a speed reducer are large in size and occupy a large installation space.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

A built-in permanent magnet planetary electric roller comprises a large-torque permanent magnet planetary gear motor, a roller support frame and a hollow shaft; the roller is arranged on the roller supporting frame, the hollow shaft is coaxially arranged in the roller, and the high-torque permanent magnet planetary reduction motor is arranged in the hollow shaft;

The high-torque permanent magnet planetary reduction motor comprises a motor and a planetary gear reducer, and the output end of the motor is connected with the planetary gear reducer;

The motor comprises a motor shell, a stator and a rotor assembly; the stator is arranged inside the motor shell, and the rotor assembly is arranged inside the stator.

Further, two ends of the roller are provided with roller end covers, and the output end of the planetary gear reducer is connected with one of the roller end covers.

Further, the output end of the planetary gear reducer is a supporting shaft, the supporting shaft is connected with the roller supporting frame through a first supporting seat, and a tapered roller bearing is arranged between the supporting shaft and the first supporting seat.

Further, a connecting shaft is connected to the hollow shaft on one side of the other roller end cover, a spherical roller bearing is arranged between the connecting shaft and the other roller end cover, and the connecting shaft is connected with the roller support frame through a second support seat.

Further, the planetary gear reducer comprises a reducer shell, an annular gear, a three-stage reducer assembly and a reducer output shaft; the speed reducer shell is fixedly connected with the motor shell, an inner gear ring is arranged on the inner side face of the speed reducer shell, the three-stage speed reducer assembly is arranged on the inner side of the inner gear ring, one end of the three-stage speed reducer assembly is connected with the rotor assembly, and the other end of the three-stage speed reducer assembly is connected with the speed reducer output shaft.

Further, the rotor assembly comprises a motor output shaft and magnetic steel, the magnetic steel is fixed on the motor output shaft in an embedded mode, and the motor output shaft is supported on two sides through deep groove ball bearings.

Further, the stator is fixed with the motor shell through a stator hot sleeve; the outer circle of the stator heat jacket is provided with a spiral water channel, two ends of the spiral water channel are connected with two water outlets, and the water outlets and the spiral water channel form a passage; two water outlets are arranged on the reducer shell, and water nozzles corresponding to the water outlets are arranged on the water outlets; the spiral water channel is arranged on the reducer shell and is communicated with the water nozzle.

Further, a plurality of cavities are arranged between the hollow shaft and the inner side wall of the roller, and the water outlet and the water nozzle are both positioned in the cavities and connected with the refrigerator.

Further, the three-stage reducer assembly comprises three sun gears, three planet carriers and nine planet gears; the periphery of each sun gear is meshed with three planetary gears to form a gear set, adjacent gear sets are connected through a planet carrier, the planet carrier at the tail end is connected with the output shaft of the speed reducer, and the sun gear at the other end is connected with the motor output shaft of the rotor assembly; the outer sides of the three planetary gears are meshed with the inner gear ring; the bearings used by the planet gears and the planet carrier at the tail end are all ball bearings; bearing raceways are correspondingly processed on the inner gear ring.

Further, the rear end of the motor shell is connected with a rear flange, and the encoder is fixed on the motor output shaft by using a nut.

Compared with the prior art, the utility model has the following technical effects:

According to the utility model, the high-speed motor and the planetary reducer with a large reduction ratio are integrated into a whole, so that the high-power-density integrated speed reducing motor with a brand new structure is formed, and the speed reducing motor is integrated with the inside of the roller by utilizing the characteristics of small volume and large torque density of the speed reducing motor, so that the occupied space of the whole roller system is greatly reduced, the space requirement of the electric roller is greatly reduced, and the manufacturing cost is reduced. Meanwhile, the whole refrigerating system is integrated in one electric cabinet, so that the compactness of the whole structure is ensured, and the temperature of the whole electric roller is ensured to be within a reasonable working range.

Drawings

FIG. 1 is a diagram of the overall structure of the present utility model;

FIG. 2 is an overall cross-sectional view of the present utility model;

FIG. 3 is a diagram of the internal structure of the high torque permanent magnet planetary reduction motor of the present utility model;

FIG. 4 is an external view of the planetary reducer of the present utility model;

Fig. 5 shows an internal structure of the planetary reducer.

Wherein:

The drum 4, the drum end cover 41, the drum support 5, the hollow shaft 6, the support shaft 51, the first support seat 52, the tapered roller bearing 53, the second support seat 54, the spherical roller bearing 61, the motor 1, the planetary gear reducer 2, the motor housing 11, the stator 12, the motor output shaft 13, the stator heat jacket 15, the rear flange 16, the reducer housing 21, the ring gear 24, the reducer output shaft 23, the spiral water channel 26, the water nozzle 25, the sun gear 27, the planet carrier 29, the planet gear 28, the ball bearing 30, the oil drain plug 31, and the oil seal 32.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

Referring to fig. 1 to 5, the device comprises a permanent magnet planetary gear motor with large torque, a built-in electric roller structure, a roller driving system and a roller cooling system.

The high-torque permanent magnet planetary reduction motor is characterized in that a high-speed permanent magnet motor is combined with a planetary reducer with a high reduction ratio, so that low-speed high-torque output is realized, the volume of the motor is greatly reduced, and the manufacturing cost is reduced;

The built-in electric roller structure comprises a steel frame for supporting the roller and the roller, and the whole structure is driven by a large-torque permanent magnet planetary gear motor built in the roller to drive the roller to rotate so as to realize the conveying of materials.

The output shaft of the permanent magnet motor is connected with the input end of the planetary reducer to form a permanent magnet planetary reducer motor, the output of the high-speed permanent magnet motor can be reduced by the planetary reducer with high reduction ratio and then changed into low-speed and high-torque output, the whole permanent magnet planetary reducer motor is arranged in a hollow shaft in the roller, the right end of the whole hollow shaft is fixedly connected with a right supporting seat, and the right supporting seat is fixed on a steel frame, so that the degrees of freedom of the hollow shaft and the whole reducer motor are limited; the permanent magnet planetary gear motor adopts a planet carrier output mode to output, an output disc is arranged at the left end of the speed reducer on the structure, the output disc is fixed with a roller left end cover and a supporting shaft at the same time, the roller left end cover is connected with the roller at the roller end part through a screw, and the supporting shaft is supported at the left end and a left supporting seat through two tapered roller bearings, so that the rotational freedom degree of the output disc is ensured. The inside of the roller is supported by a self-aligning roller bearing between the hollow shaft and the roller, so that the whole rotation freedom degree of the roller is ensured.

When the roller works, the motor drives the speed reducer, and the output disc of the speed reducer drives the whole roller to rotate, so that transmission is realized.

The electric roller control driving system comprises a frequency converter for driving the roller and a motion control board for controlling the roller to work; the control system is used for adjusting the functions of acceleration and deceleration, load starting, zero-speed braking and the like when the roller is started and stopped, and meets the requirements of actual working conditions;

the cooling system of the electric roller comprises a refrigerator and a whole temperature control system, wherein the refrigerator is connected with a heat dissipation pipeline inside the electric roller through a cooling pipeline of the refrigerator, and the temperature data collected by the temperature control system controls the operation of the refrigerator, so that the temperature of the whole electric roller is ensured to be within a reasonable working range.

The high-torque permanent magnet planetary reduction motor comprises a high-speed motor and a planetary gear reducer arranged at the front end of a motor shell.

The motor 1 comprises a motor shell 11, a stator 12, a rotor assembly, a rear flange 14, an encoder and the like which are fixed in the shell and are arranged at the rear end of the motor in a matching way.

The planetary gear reducer 2 comprises a reducer shell 21 fixedly connected with a motor shell, a sun gear 27 connected with a motor output shaft 13, a planetary gear assembly meshed with the sun gear 27, a reducer output shaft 23 connected with the planetary gear assembly, an inner gear ring 24 on the reducer shell meshed with the planetary gear and an output shaft of the reducer.

The bearings used for the planetary gear of the speed reducer and the output disc of the speed reducer are all ball bearings of a self-made rollaway nest;

an inner gear ring which is meshed with the planet gears is machined on the inner cavity wall of the reducer shell, and a bearing rollaway nest is correspondingly machined on the inner gear ring.

The upper part of the reducer housing 21 includes two water outlets, and a water nozzle 25 corresponding thereto can be installed.

The spiral water channel 26 is arranged on the outer circle of the shell of the speed reducer, a water channel passage can be formed between the spiral water channel 26 and the water jacket shell of the speed reducer, and excessive heat is taken away through cooling liquid, so that heat dissipation of the speed reducer is ensured.

The sun gear 27 is fixedly connected with the motor output shaft 13 through double bonds and screws, so that torque transmission is ensured.

The planetary gear assembly comprises three planetary gears 28 surrounding the sun gear 27 and a planetary carrier 29 connected with the planetary gears, and the planetary gears are simultaneously meshed with the sun gear and the internal teeth on the inner cavity wall of the reducer shell.

The related motor comprises a motor shell component, a stator, a rotor component, a rear flange, an electromagnetic brake and an encoder which is arranged at the rear end of the motor in a matching way, wherein the stator, the rotor component and the rear flange are fixed in the shell.

The motor shell 11 assembly consists of a stator and a water jacket which is connected with the stator heat jacket 15, a spiral water channel is reserved on the outer circle of the water jacket, two water outlets are reserved on the outer circle of the water jacket, and a passage is formed between the water outlet and the water channel so as to ensure the passing of cooling liquid and the cooling of the shell.

The stator 12 is composed of a stator core, stator punching sheets, stator coils and the like, and is fixed with the casing 11 through a heat jacket 15.

The rotor assembly comprises a motor output shaft 13, magnetic steel, a balance ring and a rotor core, wherein the magnetic steel adopts an embedded fixing mode, and the rotor assembly is supported on two sides through deep groove ball bearings.

The brake disc of the electromagnetic brake is connected with the output shaft of the motor through a key, so that the transmission of braking torque is ensured.

The encoder is fixed on the motor output shaft by using a nut, and the relative position relation with the encoder stator is ensured.

The rear flange is fixed with the rear end of the motor shell, and the encoder stator is fixed outside the end face of the electromagnetic brake.

The motor outgoing line position is positioned at the position of the outer circle of the motor shell close to the tail part, and the junction box of the motor is connected with the motor shell through the junction box adapter plate.

The motor is a permanent magnet motor. For a common electric excitation motor, the internal rotor of the electric excitation motor has windings, copper loss can be generated in the rotor windings relative to a permanent magnet motor during operation, the improvement of the motor efficiency is influenced, and meanwhile, for the electric excitation motor, under the condition of a certain output rotating speed, the volume of the motor is increased by increasing the output torque, and the improvement of the power density and the torque density is influenced. Compared with the traditional permanent magnet motor in the aspect of motor efficiency, the permanent magnet motor has the following advantages: because the magnetic field of the permanent magnet synchronous motor is generated by the permanent magnet, the excitation loss 2 caused by the magnetic field generated by exciting current is avoided, and compared with an asynchronous motor, the external characteristic efficiency curve of the permanent magnet synchronous motor is much higher in light load time efficiency value, so that the permanent magnet synchronous motor has the advantages of saving energy, compared with the largest asynchronous motor, in 3, because the power factor of the permanent magnet synchronous motor is high, compared with the asynchronous motor, the motor current is smaller, the stator copper loss of the motor is correspondingly smaller, and the efficiency is also higher. And 4, the permanent magnet synchronous motor rotor has no resistance loss, and the stator winding has little reactive current, so the temperature rise of the motor is low. The power of the permanent magnet motor with the same volume and weight can be improved by about 30 percent, and the volume, weight and used materials of the permanent magnet motor with the same power capacity can be reduced by 30 percent.

Examples:

The integrated high-torque planetary reduction motor provided by the example comprises a motor and a planetary gear reducer arranged at the front end of the motor. The planetary reducer comprises a reducer shell, a planetary reduction mechanism arranged in the reducer shell and a reducer output shaft. The motor is provided with a motor output shaft which penetrates through the shell and one end of which extends out to be connected with the planetary gear reducer. When the planetary gear speed reducer works, the output power of the motor is transmitted through the output shaft, and after the planetary gear speed reducer is in speed reduction transmission, the output power of the speed reducer is output outwards. As a preferred embodiment of the present invention, the planetary reducer has a rated rotational speed of 38rpm, a rated torque of 34000n·m, and a maximum output torque 74800n·m.

Referring to the internal structure of the body machine shown in fig. 1, the planetary gear reducer is a three-stage planetary reducer, the input end is a first-stage sun gear (input end sun gear) connected with the output shaft of the motor, and the input end sun gear is meshed with three first-stage planetary gears surrounding the input end sun gear; the back of the first-stage planet carrier fixed with the three first-stage planet gears is fixedly connected with the second-stage sun gear, and the like, so that the three-stage planetary reducer is formed.

In the structure shown, the equidistant setting of three planetary gear, this structure can make each gear atress even, has better stability, and planetary gear is not limited to three, and later stage can increase or reduce according to the required torque demand of output shaft, and size modulus also can change, guarantees output torque serialization.

Furthermore, all gears are made of metal, and the type selection of the metal materials and the corresponding heat treatment modes are optimized, so that the speed reducer has better strength and service life, the noise in the transmission process is reduced, and the transmission is more stable. Meanwhile, the structure, weight and volume of the speed reducer are optimized, and better economic benefit is obtained.

The planetary gear is further connected with the planet carrier through the self-made double-row raceway bearing, compared with the standard bearing, the planetary gear has the advantages that the raceway of the original standard gear is replaced by the base material of the gear, the integral gear of the planetary gear can be greatly reduced, the overall size of the whole speed reducer is more compact, the manufacturing cost is reduced, meanwhile, the number of balls of the self-made bearing is more than that of the standard bearing, and the bearing capacity of the bearing is improved.

Furthermore, the sun gear, the planet gears and the inner gear ring gear all adopt straight tooth profiles, so that axial force can be prevented from being generated during transmission, and meanwhile, the profiles are shifted, and the bearing capacity is enhanced.

The further reduction ratio of the speed reducer is 81, and of course, in actual use, the number of teeth and the modulus of each gear are not limited to given parameters, and different transmission ratios and transmission sizes can be obtained through different number of teeth modulus combinations on the premise of meeting the transmission strength so as to meet different use requirements.

Furthermore, the outer circle of the shell of the speed reducer is provided with a hollowed water channel, and a cooling liquid passage can be formed after the water channel is matched with the water jacket of the speed reducer, so that the redundant heat generated by the speed reducer can be taken away. The cooling medium is water.

Referring to the internal structure, the structure of the motor mainly comprises a motor shell, a stator, a rotor assembly, a rear flange, an encoder, an electromagnetic brake and a junction box which are arranged in the motor shell, wherein the motor is a permanent magnet motor, and as a preferable scheme of the embodiment, the rated rotation speed of the permanent magnet motor is 3000rpm, the rated torque is 410 N.m, and the rated power is 132KW.

Further, the rotor core adopts a sectional structure, after magnetic steel is embedded, the multi-section core is pressed into the rotating shaft, and end plates made of brass are fixed at two ends of the core.

Further motor rotor passes through two deep groove ball bearings and preceding flange and the back flange joint of motor, and wherein install the ripple spring with back flange joint's bearing, can reduce the wearing and tearing improvement life of back flange, noise when reducing the during operation lightens the vibration.

An encoder is fixed to an end of the motor rotor in an axial direction by using a round nut, and the encoder is used for detecting a rotation speed and a position.

Further, a spiral water channel is reserved on the outer circle of the shell, parameters of the water channel are optimized to ensure that heat generated by the motor is taken away in time, two water outlets are reserved on the outer circle of the water jacket, the water outlets are arranged on the side face of the machine body, a passage is formed between the water outlets and the water channel to ensure the passing of cooling liquid, so that the cooling of the shell is ensured, and the cooling medium is water.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. The built-in permanent magnet planetary electric roller is characterized by comprising a high-torque permanent magnet planetary speed reduction motor, a roller (4), a roller support frame (5) and a hollow shaft (6); the roller (4) is arranged on the roller supporting frame (5), the hollow shaft (6) is coaxially arranged inside the roller (4), and the high-torque permanent magnet planetary gear motor is arranged in the hollow shaft (6);

The high-torque permanent magnet planetary reduction motor comprises a motor (1) and a planetary gear reducer (2), wherein the output end of the motor (1) is connected with the planetary gear reducer (2);

The motor (1) comprises a motor shell (11), a stator (12) and a rotor assembly; the stator (12) is arranged inside the motor shell (11), and the rotor assembly is arranged inside the stator (12).

2. An in-built permanent magnet planetary electric roller according to claim 1, characterized in that roller end caps (41) are provided at both ends of the roller (4), and the output end of the planetary gear reducer (2) is connected to one of the roller end caps.

3. The built-in permanent magnet planetary electric roller according to claim 2, wherein the output end of the planetary gear reducer (2) is a supporting shaft (51), the supporting shaft (51) is connected with the roller supporting frame (5) through a first supporting seat (52), and a tapered roller bearing (53) is arranged between the supporting shaft (51) and the first supporting seat (52).

4. An in-built permanent magnet planetary electric roller according to claim 2, characterized in that a hollow shaft (6) at one side of the other roller end cover is connected with a connecting shaft, a spherical roller bearing (61) is arranged between the connecting shaft and the other roller end cover, and the connecting shaft is connected with the roller support frame (5) through a second support seat (54).

5. An internal permanent magnet planetary electric roller according to claim 1, characterized in that the planetary gear reducer (2) comprises a reducer housing (21), an annulus gear (24), a three-stage reducer assembly and a reducer output shaft (23); the speed reducer shell (21) is fixedly connected with the motor shell (11), an inner gear ring (24) is arranged on the inner side surface of the speed reducer shell (21), the three-stage speed reducer assembly is arranged on the inner side of the inner gear ring (24), one end of the three-stage speed reducer assembly is connected with the rotor assembly, and the other end of the three-stage speed reducer assembly is connected with the speed reducer output shaft (23).

6. The built-in permanent magnet planetary electric roller according to claim 1, wherein the rotor assembly comprises a motor output shaft (13) and magnetic steel, the magnetic steel is fixed on the motor output shaft (13) in an embedded mode, and the motor output shaft (13) is supported on two sides through deep groove ball bearings.

7. An internal permanent magnet planetary electric roller according to claim 1, characterized in that the stator (12) is fixed with the motor housing (11) by means of a stator heat jacket (15); the outer circle of the stator thermal sleeve (15) is provided with a spiral water channel, two ends of the spiral water channel are connected with two water outlets, and the water outlets and the spiral water channel form a passage; two water outlets are arranged on the reducer shell (21), and a water nozzle (25) corresponding to the water outlets is arranged on the water outlets; a spiral water channel (26) is arranged on the reducer shell (21), and the spiral water channel (26) is communicated with the water nozzle (25).

8. A built-in permanent magnet planetary electric drum according to claim 7, characterized in that a plurality of cavities are arranged between the hollow shaft (6) and the inner side wall of the drum (4), and the water outlet and the water nozzle (25) are both positioned in the cavities and connected with a refrigerator.

9. An internal permanent magnet planetary electric roller according to claim 5, characterized in that the three-stage reducer assembly comprises three sun gears (27), three planet carriers (29) and nine planet gears (28); three planetary gears (28) are meshed around each sun gear (27) to form a gear set, adjacent gear sets are connected through a planetary carrier (29), the planetary carrier (29) at the tail end is connected with a speed reducer output shaft (23), and the sun gear (27) at the other end is connected with a motor output shaft (13) of a rotor assembly; the outer sides of the three planetary gears (28) are meshed with the inner gear ring (24); the bearings used by the planet gear (28) and the planet carrier (29) at the tail end are ball bearings; bearing raceways are correspondingly processed on the inner gear ring.

10. An in-built permanent magnet planetary electric roller according to claim 1, characterized in that the rear end of the motor housing (11) is connected to a rear flange (16), and the encoder is fixed to the motor output shaft using nuts.