阅读说明：本技术 一种耐高温耐辐照的步进电机 (High-temperature-resistant and irradiation-resistant stepping motor ) 是由 刘磊 张金山 范月容 袁建东 刘天才 毕可明 郭志家 彭朝晖 衣大勇 刘孟茜 冯 于 2020-12-11 设计创作，主要内容包括：本发明属于电动机技术领域,具体涉及一种耐高温耐辐照的步进电机,包括设有两个串联的转子(12)的不导磁转轴(3),位于所述转子(12)外围的定子(1),缠绕在所述定子(1)上的绕组线圈(7),分别设置在所述不导磁转轴(3)前端和后端的前端轴承(5)和后端轴承(6),位于两个所述转子(12)之间的永磁磁钢(2),所述永磁磁钢(2)的材质为钐钴磁铁,化学成分为SmCo28,耐热温度为300度。本发明所提供的步进电机能够耐高温、耐中子/γ辐照,具有体积小、重量轻、转矩大、控制精度高和响应速度快的优点,能够用于航天航空及核工业中。(The invention belongs to the technical field of motors, and particularly relates to a high-temperature-resistant and radiation-resistant stepping motor which comprises a non-magnetic-conductive rotating shaft (3) provided with two rotors (12) connected in series, a stator (1) positioned on the periphery of the rotors (12), a winding coil (7) wound on the stator (1), a front-end bearing (5) and a rear-end bearing (6) which are respectively arranged at the front end and the rear end of the non-magnetic-conductive rotating shaft (3), and permanent magnetic steel (2) positioned between the two rotors (12), wherein the permanent magnetic steel (2) is made of samarium cobalt magnet, has a chemical composition of SmCo28, and has a heat-resistant temperature of 300 ℃. The stepping motor provided by the invention can resist high temperature and neutron/gamma irradiation, has the advantages of small volume, light weight, large torque, high control precision and high response speed, and can be used in aerospace and nuclear industries.)

1. The utility model provides a step motor of high temperature resistant radiation which characterized by: including being equipped with non-magnetic conduction pivot (3) of rotor (12) of two series connections, be located rotor (12) outlying stator (1), the winding on winding coil (7) on stator (1) set up respectively front end bearing (5) and rear end bearing (6) of non-magnetic conduction pivot (3) front end and rear end are located two permanent magnet steel (2) between rotor (12), the material of permanent magnet steel (2) is samarium cobalt magnet, and the chemical composition is SmCo28, and the high temperature resistance is 300 degrees.

2. The stepping motor with high temperature resistance and radiation resistance as claimed in claim 1, wherein: the rotor (12) and the stator (1) are made of silicon steel, and the heat-resisting temperature is greater than 300 ℃.

3. The stepping motor with high temperature resistance and radiation resistance as claimed in claim 1, wherein: the non-magnetic rotating shaft (3) is made of stainless steel, the type of the stainless steel is 440, and the heat-resisting temperature is 300 ℃.

4. The stepping motor with high temperature resistance and radiation resistance as claimed in claim 1, wherein: the front end bearing (5) and the rear end bearing (6) are made of stainless steel, the type of the stainless steel is 440, and the heat-resistant temperature is 300 ℃.

5. The stepping motor with high temperature resistance and radiation resistance as claimed in claim 1, wherein: the stepping motor is characterized by further comprising a front end cover (4) arranged on the front end bearing (5), a rear end cover (8) arranged on the rear end bearing (6), and a shell (9) arranged between the front end cover (4) and the rear end cover (8), wherein the front end cover (4) and the rear end cover (8) are connected with the shell (9) to form an external structure of the stepping motor.

6. The stepping motor with high temperature resistance and radiation resistance as claimed in claim 5, wherein: the front end cover (4), the rear end cover (8) and the shell (9) are all made of stainless steel, the type of the stainless steel is 316, and the heat-resisting temperature is greater than 300 ℃.

7. The stepping motor with high temperature resistance and radiation resistance as claimed in claim 1, wherein: the winding coil is characterized by further comprising a motor outgoing line (10) connected with the winding coil (7), wherein the motor outgoing line (10) is made of high-temperature radiation-resistant polyimide, and the heat-resistant temperature is 440 ℃; the enameled wire of the motor outgoing line (10) is made of polyimide and is subjected to ceramic modification treatment, and the heat-resistant temperature is 260 ℃.

8. The stepping motor with high temperature resistance and radiation resistance as claimed in claim 7, wherein: still include the sleeve and be used for supporting the skeleton of winding coil (7), still include the motor is qualified for the next round of competitions (10) around the package material, the motor be qualified for the next round of competitions (10) around the package material with the sleeve with the material of skeleton is PTFE, and heat-resisting temperature is 300 degrees.

9. The stepping motor with high temperature resistance and radiation resistance as claimed in claim 7, wherein: the binding belt is made of glass fiber, the glass fiber is made of SiO2, and the heat-resistant temperature is higher than 300 ℃; still including being used for pasting the ligature area winding coil (7) with the glue of motor play line (10), the composition of glue contains ceramic epoxy material, ceramic epoxy material's material is SiO2, and heat-resisting temperature is 300 degrees.

10. The stepping motor with high temperature resistance and radiation resistance as claimed in claim 1, wherein: the coating also comprises fluorine grease which plays a role of grease, wherein the fluorine grease comprises nano fluorine particles and high-temperature oil, and the heat-resistant temperature is 280 ℃.

Technical Field

The invention belongs to the technical field of motors, and particularly relates to a high-temperature-resistant and radiation-resistant stepping motor.

Background

The step motor is an open-loop control element which converts an electric pulse signal into angular displacement or linear displacement, the step pulse signal and the angular displacement are in a linear relation, and the angular displacement output has no accumulated error. The temperature resistance of a common stepping motor is usually below 130 ℃, and when the temperature is exceeded, the motor can generate torque reduction, wire softening and demagnetization of permanent magnet materials, so that irreversible damage is caused. The stepping motor has the advantages of reliable work, high control precision, no accumulated error, no brush, no relation between the rotating speed and the load, and the like. However, the further application of the stepping motor is restricted by the defects of large volume and weight, limited working environment and the like.

With the development of aerospace and nuclear industries, the demand for stepping motors is increasing, the use environment is deteriorated and complicated, and the reliability is high. Therefore, the stepping motor which is resistant to high temperature, neutron/gamma radiation, small in size, light in weight, large in torque, high in control precision and high in response speed is developed, and the performance, reliability, application range and the like of the stepping motor can be improved.

Disclosure of Invention

The invention aims to provide a stepping motor which has the advantages of high temperature resistance of 200 ℃, neutron/gamma irradiation resistance, small volume, light weight, large torque, high control precision and high response speed, and can be used in the aerospace and nuclear industries.

In order to achieve the purpose, the invention adopts the technical scheme that the stepping motor is high-temperature (200 ℃) and radiation resistant, wherein the stepping motor comprises a non-magnetic rotating shaft provided with two serially-connected rotors, a stator positioned on the periphery of the rotors, a winding coil wound on the stator, a front end bearing and a rear end bearing which are respectively arranged at the front end and the rear end of the non-magnetic rotating shaft, and permanent magnet steel positioned between the two rotors, wherein the permanent magnet steel is made of samarium cobalt magnet, has the chemical composition of SmCo28, and has the heat-resistant temperature of 300 ℃.

Further, the rotor and the stator are made of silicon steel, and the heat-resisting temperature is greater than 300 ℃.

Further, the material of the non-magnetic rotating shaft is stainless steel, the type of the stainless steel is 440, and the heat-resisting temperature is 300 ℃.

Further, the front end bearing and the rear end bearing are made of stainless steel, the type of the stainless steel is 440, and the heat-resistant temperature is 300 ℃.

The stepping motor further comprises a front end cover arranged on the front end bearing, a rear end cover arranged on the rear end bearing and a shell arranged between the front end cover and the rear end cover, wherein the front end cover and the rear end cover are connected with the shell to jointly form an external structure of the stepping motor.

Further, the front end cover, the rear end cover and the shell are all made of stainless steel, the type of the stainless steel is 316, and the heat-resisting temperature is higher than 300 ℃.

Further, the winding device also comprises a motor outgoing line connected with the winding coil, wherein the motor outgoing line is made of high-temperature radiation-resistant polyimide, and the heat-resistant temperature is 440 ℃; the enameled wire for motor outgoing is made of polyimide, and is subjected to ceramic modification treatment, so that the heat-resistant temperature is 260 ℃.

Further, still include the sleeve and be used for supporting the skeleton of winding coil still includes the motor is qualified for the next round of competitions the package material, the motor is qualified for the next round of competitions the package material with the sleeve with the material of skeleton is PTFE, and heat-resisting temperature is 300 degrees.

The winding coil is characterized by further comprising a binding belt for binding the winding coil, wherein the binding belt is made of glass fiber, the glass fiber is made of SiO2, and the heat-resistant temperature is higher than 300 ℃; still including being used for pasting the ligature area the winding coil with the glue of motor outgoing line, the composition of glue contains ceramic epoxy material, ceramic epoxy material's material is SiO2, and the heatproof temperature is 300 degrees.

Further, the coating also comprises fluorine grease which plays a role of grease, wherein the fluorine grease comprises nano fluorine particles and high-temperature oil, and the heat-resistant temperature is 280 ℃.

The invention has the beneficial effects that: the stepping motor provided by the invention can resist high temperature and neutron/gamma irradiation, has the advantages of small volume, light weight, large torque, high control precision and high response speed, and can be used in aerospace and nuclear industries.

Drawings

FIG. 1 is a schematic diagram of a high temperature and radiation resistant stepper motor according to an embodiment of the present invention;

FIG. 2 is a view in the direction A of FIG. 1;

FIG. 3 is a schematic perspective view of a high temperature and radiation resistant stepper motor according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of an internal structure of a high temperature and radiation resistant stepping motor according to an embodiment of the present invention;

in the figure: 1-stator, 2-permanent magnet steel, 3-non-magnetic-conductive rotating shaft, 4-front end cover, 5-front end bearing, 6-rear end bearing, 7-winding coil, 8-rear end cover, 9-shell, 10-motor outlet, 11-screw and 12-rotor.

Detailed Description

The invention is further described below with reference to the figures and examples.

As shown in fig. 1 to 4, the high temperature (200 ℃) and radiation resistant stepping motor provided by the invention comprises a non-magnetic rotating shaft 3 provided with two rotors 12 connected in series, a stator 1 located at the periphery of the rotors 12, a winding coil 7 wound on the stator 1, a front end bearing 5 and a rear end bearing 6 respectively arranged at the front end and the rear end of the non-magnetic rotating shaft 3, and permanent magnet steel 2 located between the two rotors 12, wherein the permanent magnet steel 2 is made of samarium cobalt magnet, the chemical component is SmCo28, and the heat resistance temperature is 300 ℃.

The rotor 12 and the stator 1 are made of silicon steel, and the heat-resisting temperature is more than 300 ℃.

The material of the non-magnetic rotating shaft 3 is stainless steel, the type of the stainless steel is 440, and the heat-resisting temperature is 300 ℃.

The front end bearing 5 and the rear end bearing 6 are made of stainless steel, the type of the stainless steel is 440, and the heat-resistant temperature is 300 ℃.

The stepping motor further comprises a front end cover 4 arranged on the front end bearing 5, a rear end cover 8 arranged on the rear end bearing 6 and a shell 9 arranged between the front end cover 4 and the rear end cover 8, wherein the front end cover 4 and the rear end cover 8 are connected with the shell 9 to jointly form an external structure of the stepping motor.

The front end cover 4, the rear end cover 8 and the shell 9 are all made of stainless steel, the type of the stainless steel is 316, and the heat-resistant temperature is more than 300 ℃.

The motor coil is characterized by further comprising a motor outgoing line 10 connected with the winding coil 7, wherein the motor outgoing line 10 is made of high-temperature radiation-resistant polyimide, and the heat-resistant temperature is 440 ℃; the enameled wire of the motor outgoing line 10 is made of polyimide, and is subjected to ceramic modification treatment, so that the heat-resistant temperature is 260 ℃.

The winding device further comprises a sleeve and a framework for supporting the winding coil 7, and further comprises a winding material of the motor outgoing line 10, the winding material of the motor outgoing line 10 and the materials of the sleeve and the framework are PTFE, and the heat-resistant temperature is 300 ℃.

The binding belt is made of glass fiber, the glass fiber is made of SiO2, and the heat-resistant temperature is higher than 300 ℃; the winding coil is characterized by further comprising glue for adhering the binding tape, the winding coil 7 and the motor outgoing line 10, wherein the glue comprises a ceramic epoxy material, the ceramic epoxy material is made of SiO2, and the heat-resistant temperature is 300 ℃.

The coating also comprises fluorine grease which plays a role of grease, wherein the fluorine grease comprises nano fluorine particles and high-temperature oil, and the heat-resistant temperature is 280 ℃.

The working principle of the high-temperature-resistant and radiation-resistant stepping motor provided by the invention is as follows:

if the permanent magnet steel 2 is not arranged between the two sections of the rotors 12 or the winding coil 7 on the magnetic pole of the stator 1 is not electrified, the motor basically cannot generate torque and certainly cannot rotate; when the magnetic potential generated by the permanent magnetic steel 2 and the magnetic potential generated by the winding coil 7 interact, the rotor 12 can rotate under the action of the rotating electromagnetic torque. One end of the iron core of the rotor 12 is in an N polarity and the other end is in an S polarity because of the influence of the permanent magnet steel 2; when the winding coil 7 is electrified, the magnetic pole also presents N polarity or S polarity according to the difference between the current direction and the winding direction of the coil; the position where the magnetic conduction is the largest under the magnetic poles with different polarities of the stator and the rotor and the magnetic conduction is the smallest under the poles with the same polarity is the balance position of the hybrid stepping motor.

The performance indexes of the high-temperature-resistant and radiation-resistant stepping motor provided by the invention are as follows:

excitation voltage: 28 VDC;

rated phase current: less than or equal to 0.6A;

phase number: 2, phase;

step angle: 1.8 degrees;

power-off holding torque: more than 0.35 N.m;

moment of inertia: greater than 68g cm

Insulation resistance: 100M Ω (500VDC 1 Min);

weight: < 400 g;

temperature rise: not more than 50k (normal temperature and pressure);

ambient temperature: -10 ℃ to 300 ℃;

radiation resistance level:

thermal neutron fluence (n/cm 2): 2.5E +17

Epithermal neutron fluence (n/cm 2): 2.2E +18

Fast neutron fluence (n/cm 2): 9.0E +17

Gamma absorbed dose (Gy): 2.0E + 07.

The device according to the present invention is not limited to the embodiments described in the specific embodiments, and those skilled in the art can derive other embodiments according to the technical solutions of the present invention, and also belong to the technical innovation scope of the present invention.