Direct drive motor for stirrer

Abstract

The utility model discloses a direct drive motor for a stirrer, relates to the technical field of stirring, and mainly solves the technical problems that in the prior art, the temperature rise is caused by poor heat dissipation of a motor, and a bearing is easy to damage due to high temperature and oil shortage, the motor comprises a shell, a stator assembly, a rotor assembly, an output shaft, a bearing and a fixed flange, and the stator assembly is fixed in the shell; the rotor assembly is rotatably arranged in the shell through a bearing; the output shaft is fixedly connected with the rotor assembly and extends out of the shell to be directly driven, and the core improvement is that the outer wall of the shell is provided with heat dissipation fins, a cavity layer is arranged between the outer wall and the inner wall of the shell, and a heat-conducting medium is introduced to form an efficient heat dissipation path; by means of the collaborative design, heat inside the motor can be quickly led out, lubricating guarantee of the working environment of the bearing is achieved, and therefore the reliability and durability of the motor are remarkably improved, and the service life of the motor is remarkably prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stirring, and particularly relates to a direct drive motor for a stirrer. BACKGROUND

[0002] When the stirrer is working, the motor needs to operate under high speed and high torque and bear frequent load impact, which will cause a large amount of heat to be generated in the motor, so that the temperature of the motor rises significantly. The existing stirrer motor, especially the direct drive motor, mainly faces the following problems: the traditional motor has insufficient heat dissipation design, and the heat accumulates in the stator winding and the internal iron core and cannot be quickly dissipated, resulting in a sharp rise in the temperature of the motor; the excessively high temperature accelerates the aging of the insulation material and reduces the performance of the magnetic steel, ultimately leading to a decrease in the efficiency of the motor, power attenuation, and even burning of the motor, which seriously restricts the continuous working ability and service life of the motor; the high-temperature environment in the motor is directly transmitted to the bearing, which on the one hand accelerates the evaporation and oxidation of the lubricating grease of the bearing itself, resulting in lubrication failure, and on the other hand may reduce the viscosity of the lubricating grease or even cause the lubricating grease to flow out of the sealing element, causing the bearing to dry grind due to lack of oil, resulting in intensified bearing wear, abnormal noise, jamming, and even seizure, which are common faults of the direct drive motor; therefore, it is necessary to provide a direct drive motor for a stirrer that can effectively solve the internal heat dissipation of the motor and has an efficient external oil injection mode to ensure stable operation of the bearing in a good lubrication environment. SUMMARY

[0003] The utility model aims at overcoming the insufficient of prior art, provide a kind of compact structure, transmission efficiency is high, it is stable in operation, heat dissipation performance is good and long life's direct drive motor special for stirrer.

[0004] To achieve the above object, the utility model adopts the following technical scheme: a kind of direct drive motor for stirrer, including shell, stator assembly, rotor assembly, output shaft, bearing and fixed flange, the stator assembly is fixed in shell, the rotor assembly is rotatably arranged in shell by bearing and is coaxially arranged with stator assembly, the output shaft is fixedly connected with rotor assembly and extends out of shell, characterized by: the shell is metal shell, and the outer wall of the shell is provided with heat dissipation fins;The rotor assembly includes rotor iron core and permanent magnet, the permanent magnet is arranged in the rotor iron core in segmented skew pole mode, the bearing is communicated with the shell by oil injection pipe, the output shaft is divided into front end and rear end, and the fixed flange is bolted and fixed on the front end of the output shaft and the shell.

[0005] Preferably, the output shaft is supported by two bearings, and a pre-tightening spring is arranged between the two bearings;The fan blade is located at the rear end of the output shaft and is connected by a key groove.

[0006] Preferably, at least one rotating shaft lip seal ring is arranged at the position where the output shaft extends out of the shell.

[0007] Preferably, the inner wall of the shell is circular in cross section, and a cavity layer is arranged between the inner wall and the outer wall of the shell, the cavity layer is arranged in 3 to 6 groups along the inner wall of the shell and is distributed in a circle, and the cavity layers are connected in series; the cavity layer is filled with a heat-conducting medium, and the heat-conducting medium is heat-conducting silicone grease or cooling water.

[0008] Preferably, the coil of the stator assembly is wound by flat copper wire.

[0009] Preferably, the shell is made of aluminum alloy.

[0010] Preferably, the fixing flange is provided with a matched stopper and a bolt hole.

[0011] The utility model provides a direct drive motor for stirrer, has following beneficial effect: first, the utility model discloses through metal casing, external heat dissipation fin and inside excellent heat conduction design, can spread the heat generated when the motor runs to the environment quickly, effectively prevent the motor from burning because of temperature rise too high, prolong the motor life.

[0012] Second, the utility model discloses through the oil injection structure design to bearing outside, avoided the mechanical error accumulation and artificial cost waste caused by the disassembly motor, ensured that bearing is always in good lubrication state in long -term use, thoroughly solved the damage problem because of high temperature oil shortage.

[0013] Third, the utility model discloses the motor temperature is effectively controlled, and the durability and reliability of motor get qualitative leap, especially suitable for needing long time high strength work. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the cross section structure schematic drawing of example.

[0015] Fig. 2 It is the plane structure schematic drawing of rotor assembly of example.

[0016] Fig. 3 It is the cross section view of shell of example.

[0017] The figure mark is: 1, shell;2, stator assembly;3, rotor assembly;31, rotor core;32, permanent magnet;4, output shaft;5, bearing;6, fixed flange;7, rotary shaft lip seal ring;8, fan blade;9, oil injection pipe;10, pre-tightening spring;11, heat dissipation fin;12, cavity layer. DETAILED DESCRIPTION

[0018] The utility model will be further explained in detail in combination with the drawings and specific embodiment, and the embodiment of the utility model is given for example and description, and is not exhaustive or limit the utility model to the disclosed form.

[0019] Please refer to Figs. 1-2 The utility model provides a technical scheme: a direct drive motor for stirrer, including casing 1, stator assembly 2, rotor assembly 3, output shaft 4, bearing 5 and fixed flange 6, stator assembly 2 is fixed in casing 1, rotor assembly 3 is rotatably arranged in casing 1 through bearing 5 and is coaxial with stator assembly 2, output shaft 4 is fixedly connected with rotor assembly 3 and extends casing 1, casing 1 is metal casing, and its outer wall is equipped with heat dissipation fin 11;Rotor assembly 3 includes rotor iron core 31 and permanent magnet 32, permanent magnet 32 is arranged in rotor iron core 31 in segmented skew pole mode, bearing 5 is communicated with casing 1 and has oil injection pipe 9, output shaft 4 divides front end and rear end, and fixed flange 6 is bolted with casing 1 at the front end of output shaft 4.

[0020] Oil injection pipe 9 leads to the outside of casing 1, which can directly avoid disassembling the motor, so that the lubricating oil is injected into bearing 5 from the outside of the motor through oil injection pipe 9, and bearing 5 can be fully lubricated.

[0021] Output shaft 4 is supported by two bearings 5, and a pre-tightening spring 10 is arranged between the two bearings 5;Blade 8 is located at the rear end of output shaft 4 and is connected through a key groove.

[0022] Bearing 5 has an inner ring and an outer ring, the inner ring can rotate coaxially relative to the outer ring, the outer ring of bearing 5 is fixed relative to casing 1, and output shaft 4 is fixed on the inner ring of bearing 5 and can rotate coaxially relative to casing 1.

[0023] The position of output shaft 4 extending out of casing 1 is provided with at least one rotating shaft lip seal ring 7.

[0024] Please refer to Fig. 3 The inner wall of casing 1 is circular in cross-section, and a cavity layer 12 is arranged between the inner wall and the outer wall of casing 1, the cavity layer 12 is arranged in 3 to 6 groups along the inner wall of casing 1 and is distributed in a circular manner, and the cavity layers 12 are connected in series;The cavity layer 12 is filled with a heat-conducting medium, which is heat-conducting silicone grease or cooling water.

[0025] An inlet pipe and an outlet pipe are arranged outside the casing 1, the inlet pipe communicates with the cavity layers 12 in the casing 1, the cavity layers 12 are connected in series between the groups, and the last cavity layer 12 in the series communicates with the outlet pipe, so that the inlet pipe and the outlet pipe are connected end to end, thereby realizing the circulation of the heat-conducting medium in the casing 1 and reducing the temperature of the motor.

[0026] The coil of stator assembly 2 is wound with flat copper wire.

[0027] The casing 1 is made of aluminum alloy.

[0028] The fixed flange 6 is provided with a mating stop and a bolt hole.

[0029] Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments, based on the embodiments in the present application, all other embodiments obtained by the ordinary skilled in the art and related fields without creative labor should belong to the protection scope of the present application.

Claims

1. A direct drive motor for a mixer, comprising a housing (1), a stator assembly (2), a rotor assembly (3), an output shaft (4), a bearing (5) and a fixing flange (6), the stator assembly (2) being fixed in the housing (1), the rotor assembly (3) being rotatably arranged in the housing (1) by the bearing (5) and coaxial with the stator assembly (2), the output shaft (4) being fixedly connected with the rotor assembly (3) and extending out of the housing (1), characterized in that: The shell (1) is a metal shell, and the outer wall of the shell is provided with heat dissipation fins (11); the rotor assembly (3) comprises a rotor core (31) and a permanent magnet (32), the permanent magnet (32) is arranged in the rotor core (31) in a segmented skew pole manner, the bearing (5) is communicated with the shell (1) through an oil injection pipe (9), the output shaft (4) is divided into a front end and a rear end, and the fixed flange (6) is bolted to the front end of the output shaft (4) and the shell (1).

2. A direct drive motor for a blender as claimed in claim 1, characterized in that: The output shaft (4) is supported by two bearings (5), and a pre-tightening spring (10) is arranged between the two bearings (5); the fan blade (8) is located at the rear end of the output shaft (4) and is connected through a key groove.

3. A direct drive motor for a blender as defined in claim 1, wherein: At least one rotary shaft lip seal ring (7) is arranged at the position where the output shaft (4) extends out of the shell (1).

4. The direct drive motor for a blender of claim 1, wherein: The inner wall of the shell (1) is circular in cross section, and a cavity layer (12) is arranged between the inner wall and the outer wall of the shell (1), the cavity layer (12) is arranged in 3 to 6 groups along the inner wall of the shell (1) and is distributed in a circular manner, and the cavity layers (12) are connected in series; the cavity layer (12) is filled with a heat conducting medium, and the heat conducting medium is heat conducting silicone grease or cooling water.

5. The direct drive motor for a blender of claim 1, wherein: The coil of the stator assembly (2) is wound by flat copper wire.

6. A direct drive motor for a blender as defined in claim 1, wherein: The shell (1) is made of aluminum alloy.

7. A direct drive motor for a blender as defined in claim 1, wherein: The fixed flange (6) is provided with a matched stop opening and a bolt hole.

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