Rotary motor and installation method thereof

Abstract

According to the rotating motor and the installation method thereof, an air floating structure is adopted between a rotor and a stator, gas lubrication is adopted between relative movement parts, abrasion is extremely small, the service life is long, and the manufacturing precision can be kept for a long time; the gas film has an error homogenization effect, so that the overall motion precision can be improved; and a cooling part is added, so that the temperature rise of the motor can be further reduced, and the thrust density of the motor is increased. The problems of large friction, poor shock resistance, unstable movement, poor precision, short service life and the like caused by a mechanical rolling bearing structure can be avoided, and meanwhile the situation that the running precision of a product is affected by too high motor temperature can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of rotating motors, and in particular to a rotating motor and an installation method thereof. Background Art

[0002] Traditional rotating motors are usually driven through connecting mechanisms such as speed reducers, gearboxes, and pulleys. Since there are many intermediate mechanisms, backlash, mechanical losses, and noise are likely to occur, which will reduce the machine performance, increase the machine size and weight. A direct drive rotating motor can be directly installed on the load, so there is no need for a mechanical transmission device, which can greatly improve the reliability. The use of mechanical transmission components that are prone to wear greatly reduces the system maintenance workload, thus significantly increasing the mean time between failures. At the same time, the load acceleration is optimized, the power consumption is reduced, the system inertia is reduced, and the accuracy is improved.

[0003] At present, most rotating motors use mechanical rolling bearings for transmission on the one hand, resulting in large friction and large running fluctuations, which affect the service life and accuracy of the motor. On the other hand, natural cooling is adopted, which makes the temperature rise of the motor relatively high, easily causes deformation of the workpiece, and leads to a relatively reduced rotational accuracy of the motor. Summary of the Invention

[0004] The purpose of the present invention is to provide a rotating motor and an installation method thereof. By adopting an air-floating structure between the rotor and the stator, gas lubrication exists between the relatively moving parts, with extremely small wear and long service life, and the manufacturing accuracy can be maintained for a long time. Through the error averaging effect of the air film, the overall motion accuracy can be improved. The cooling part is added, which can further reduce the temperature rise of the motor and increase the thrust density of the motor, solving the above-mentioned defects in the prior art.

[0005] A rotating motor includes a base 1, a housing 2, and a support part 3: a position feedback mounting plate 11 is provided on the base 1, and the housing 2 is fixedly arranged on the base 1; the housing 2 includes an outer cover 23 and a cooler 22 and a motor stator 21 are arranged inside the housing 2; the support part 3 includes a fixing member 32 and a support rotating member 33. There is a gap between the fixing member 32 and the support rotating member 33, and a plurality of throttle holes are provided at the contact part. Air flows in through the pipeline joint 321, passes through the throttle holes, and then discharges from the exhaust hole 322, forming an air film between the fixing member 32 and the support rotating member 33 for floating up the support rotating member 32.

[0006] In one embodiment, a sealing cover 12 is further provided on the base 1, and a position feedback sensor 111 is fixedly arranged on the feedback mounting plate 11.

[0007] In one embodiment, the cooler 22 and the outer shroud 23 form a sealed cavity, and the motor stator 21 is installed inside the cooler 22.

[0008] In one embodiment, the cooler 22 is provided with a serpentine cooling pipeline and pipeline inlet and outlet connectors 231, and the pipeline inlet and outlet connectors 231 are connected to the sealed cavity.

[0009] In one embodiment, the support portion 3 is further provided with a motor rotor 31. The yoke of the motor rotor 31 is fixedly arranged on the support rotating member 33, and the permanent magnet 311 is installed and fixed on the yoke.

[0010] In one embodiment, the yoke has a cylindrical structure, and a position feedback unit 312 is provided at the end of the yoke, which cooperates with the position feedback sensor 111 to real-time feedback position data.

[0011] An installation method of a rotating electric machine for the rotating electric machine described in any one of the above, comprising:

[0012] Step S1, install the base. The base is provided with a sealing cover and a position feedback mounting plate;

[0013] Step S2, install the housing. The housing is arranged on the base. The housing is provided with an outer shroud, a cooler and a motor stator;

[0014] Step S3, install the support portion. The support portion is arranged on the housing. The support portion is provided with a support fixing member, a support rotating member and a motor rotor.

[0015] In one embodiment, the step S1 includes fixing the position feedback sensor on the position feedback mounting plate.

[0016] In one embodiment, the step S2 includes:

[0017] Step S21, fix the outer shroud and the cooler, and arrange them on the base to form a sealed cavity;

[0018] Step S22, conduct the sealed cavity with the pipeline inlet and outlet connectors;

[0019] Step S23, closely fit the outer surface of the motor stator with the inner surface of the cooler.

[0020] In one embodiment, the step S3 includes:

[0021] Step S31: Install and fix the support fixing member and the support rotating member. There is a gap between the support fixing member and the support rotating member, and multiple throttle orifices are provided at the contact part. After the airflow passes through the throttle orifices, it is discharged from the exhaust holes, and an air film is formed between the fixing member and the support rotating member, and the air film floats up the support rotating member.

[0022] Step S32: Install the yoke of the rotor on the support rotating member. The yoke has a cylindrical structure, and the permanent magnets are installed and fixed on the yoke.

[0023] Step S33: Install and fix the support fixing member on the outer shroud.

[0024] Step S34: Install the motor rotor on the support rotating member.

[0025] Step S35: Install the position feedback unit on the yoke of the motor rotor and connect it to the position feedback sensor in a signal manner.

[0026] The above technical solution has the following advantages or beneficial effects:

[0027] In this rotary motor and its installation method of the present invention, an air-floating structure is adopted between the rotor and the stator, and gas lubrication is used between the relatively moving parts, with extremely small wear and long service life, and the manufacturing accuracy can be maintained for a long time; due to the error averaging effect of the air film, the overall motion accuracy can be improved; a cooling part is added, which can further reduce the temperature rise of the motor and increase the thrust density of the motor. It can avoid problems such as large friction, poor seismic resistance, unstable motion, poor accuracy, and low service life caused by the mechanical rolling bearing structure. At the same time, it can avoid the influence of too high motor temperature on the operation accuracy of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of a rotary motor according to an embodiment of the present invention;

[0029] Figure 2 is a schematic cross-sectional structural diagram of a rotary motor according to an embodiment of the present invention;

[0030] Figure 3 is a schematic cross-sectional structural diagram of another embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention is provided in conjunction with the accompanying drawings.

[0032] Combined with Figure 1 — Figure 3As shown in the figure, a rotary motor provided by the present invention aims to solve the problems of high temperature rise, large friction, poor seismic resistance, unstable movement, low life, and poor accuracy in the prior art.

[0033] A rotary motor includes a base 1, a housing 2, and a support part 3: A position feedback mounting plate 11 is provided on the base 1, and the housing 2 is fixedly arranged on the base 1; The housing 2 includes an outer cover 23, and a cooler 22 and a motor stator 21 are arranged inside the housing 2; The support part 3 includes a fixing part 32 and a support rotating part 33. There is a gap between the fixing part 32 and the support rotating part 33, and a plurality of throttle holes are provided at the contact part. Air flows in through the pipeline joint 321, passes through the throttle holes, and then discharges from the exhaust hole 322, forming an air film between the fixing part 32 and the support rotating part 33 for floating up the support rotating part 32.

[0034] Further, in a preferred embodiment of the rotary motor of the present invention, a sealing cover 12 is further provided on the base 1, and a position feedback sensor 111 is fixedly arranged on the feedback mounting plate 11.

[0035] Further, in a preferred embodiment of the rotary motor of the present invention, the cooler 22 and the outer cover 23 form a sealed cavity, and the motor stator 21 is installed inside the cooler 22.

[0036] Further, in a preferred embodiment of the rotary motor of the present invention, the cooler 22 is provided with a serpentine cooling pipeline and pipeline inlet and outlet joints 231, and the pipeline inlet and outlet joints 231 are connected to the sealed cavity.

[0037] Further, in a preferred embodiment of the rotary motor of the present invention, the support part 3 is further provided with a motor rotor 31. The yoke of the motor rotor 31 is fixedly arranged on the support rotating part 33, and the permanent magnet 311 is installed and fixed on the yoke.

[0038] Further, in a preferred embodiment of the rotary motor of the present invention, the yoke has a cylindrical structure, and a position feedback unit 312 is provided at the end of the yoke, which cooperates with the position feedback sensor 111 to feedback position data in real time.

[0039] The motor includes, but is not limited to, other types of motors such as coreless linear motors and iron-core linear motors.

[0040] The rotating electric machine of the present invention includes a base 1, a housing 2, and a support portion 3. The base 1 is provided with a position feedback mounting plate 11 and a sealing cover 12. The position feedback sensor 111 is installed and fixed on the position feedback mounting plate 11. The housing 2 is installed and fixed on the base 1 and mainly consists of an outer shield 23, a cooler 22, and a motor stator 21. The cooler 22 is provided with a serpentine cooling pipeline and pipeline inlet and outlet joints 231. The cooler 22 and the outer shield 23 form a sealed cavity, and the pipeline inlet and outlet joints 231 are connected to the sealed cavity for the circulating flow of the cooling medium. The motor stator 21 is installed and solidified on the inner surface of the cooler 22, which can effectively reduce the temperature rise of the motor. The support portion 3 consists of a support fixing member 32, a support rotating member 33, and a motor rotor 31. The support fixing member 32 is installed and fixed on the outer shield 23. There is a gap between the support fixing member 32 and the support rotating member 33, and a plurality of dense throttle holes are provided at the contact places. The air flows in through the pipeline joint 321, passes through the throttle holes, and then discharges from the exhaust hole 322. Thus, an air film will be formed between the support fixing member 32 and the support rotating member 33. This air film floats up the support rotating member 32. The relative moving parts are lubricated by gas, with extremely small wear, long service life, and can maintain the manufacturing accuracy for a long time. Moreover, the air film has an error averaging effect, which can improve the overall motion accuracy. The air floating structure between the support fixing member 32 and the support rotating member 33 includes but is not limited to the hydrostatic support method, and other air floating methods such as hydrodynamic support can also be adopted. It can avoid problems such as large friction, poor seismic resistance, unstable motion, poor accuracy, and low service life caused by the mechanical rolling bearing structure. At the same time, it can avoid the high temperature of the motor from affecting the operation accuracy of the product. The yoke of the motor rotor 31 is installed and fixed on the support rotating member 33. The yoke has a cylindrical structure, and the permanent magnet 311 is installed and fixed on the yoke. A position feedback unit 312 is provided at the end of the yoke. The position feedback unit 312 cooperates with the position feedback sensor 111 to real-time feedback position data. It can effectively solve the problems of high temperature rise, large friction, poor seismic resistance, unstable motion, low service life, and poor accuracy of the rotating electric machine.

[0041] Among them, the position sensor 111 includes but is not limited to a grating, a magnetic grating, or other rotary position sensors.

[0042] In another embodiment of the present invention, for some light-load working conditions, the cooler accessories can be not selected, and the cooler 22 is changed to a throttle 24, where the throttle 24 includes but is not limited to the structures described in the text. The housing 2 includes an outer shield 23, a throttle 24, and a motor stator 21. The throttle 24 and the outer shield 23 form a sealed cavity, and the motor stator 21 is installed on the inner surface of the throttle 24.

[0043] The present invention also provides an installation method for a rotating electric machine to solve the problems of high temperature rise, large friction, poor seismic resistance, unstable motion, low service life, and poor accuracy of the rotating electric machine. The steps of the method are as follows:

[0044] An installation method for a rotating electrical machine, for a rotating electrical machine described in any one of the above, comprising:

[0045] Step S1, installing a base, on which a sealing cover and a position feedback mounting plate are provided;

[0046] Step S2, installing a housing, arranging the housing on the base, the housing being provided with an outer shield, a cooler and a motor stator;

[0047] Step S3, installing a support part, arranging the support part on the housing, the support part being provided with a support fixing member, a support rotating member and a motor rotor.

[0048] Further, in a preferred embodiment of the installation method for a rotating electrical machine of the present invention, step S1 includes fixing a position feedback sensor on the position feedback mounting plate.

[0049] Further, in a preferred embodiment of the installation method for a rotating electrical machine of the present invention, step S2 includes:

[0050] Step S21, fixing the outer shield and the cooler, arranging them on the base to form a sealed cavity;

[0051] Step S22, conducting the sealed cavity with a pipeline inlet and outlet joint;

[0052] Step S23, closely fitting the outer surface of the motor stator with the inner surface of the cooler.

[0053] Further, in a preferred embodiment of the installation method for a rotating electrical machine of the present invention, step S3 includes:

[0054] Step S31, installing and fixing the support fixing member and the support rotating member, there is a gap between the support fixing member and the support rotating member and there are a plurality of throttle holes at the contact part, after the air flow passes through the throttle holes, it is discharged from the exhaust hole, and an air film is formed between the fixing member and the support rotating member, and the air film floats up the support rotating member;

[0055] Step S32, installing the yoke of the rotor on the support rotating member, the yoke is in a cylindrical structure, and permanent magnets are installed and fixed on the yoke;

[0056] Step S33, installing and fixing the support fixing member on the outer shield;

[0057] Step S34, installing the motor rotor on the support rotating member;

[0058] Step S35: Install the position feedback unit on the yoke of the motor rotor and connect it to the position feedback sensor in signal connection.

[0059] In the installation method of the present invention, a sealing cover and a position feedback mounting plate are provided on the base, and the position feedback sensor is fixedly installed on the position feedback mounting plate:

[0060] First, fix the outer cover and the cooler together, install and fix them on the base to form a sealed cavity. The outer cover is provided with pipeline inlet and outlet joints, and the sealed cavity is communicated with the pipeline inlet and outlet joints. The outer surface of the motor stator is closely attached to the inner surface of the cooler;

[0061] The housing is composed of an outer cover, a cooler, and a motor stator:

[0062] First, fix the outer cover and the cooler together, install and fix them on the base to form a sealed cavity. The outer cover is provided with pipeline inlet and outlet joints, and the sealed cavity is communicated with the pipeline inlet and outlet joints. The outer surface of the motor stator is closely attached to the inner surface of the cooler;

[0063] The support part is composed of a support fixing member, a support rotating member, and a motor rotor:

[0064] First, install and fix the support fixing member and the support rotating member together. There is a gap between the support fixing member and the support rotating member, and there are multiple dense throttling small holes at the contact place. The air flow flows in through the pipeline joint, passes through the throttling small holes and then discharges from the exhaust hole. Thus, an air film will be formed between the fixing member and the support rotating member, and this air film will float up the support rotating member. The rotor yoke is installed and fixed on the support rotating member, and the yoke is in a cylindrical structure. The permanent magnet is installed and fixed on the yoke. To form the motor rotor, install and fix the support fixing member on the outer cover, install and fix the motor rotor on the support rotating member, install and fix the position feedback unit on the motor rotor yoke, and cooperate with the position feedback sensor to real-time feedback the position data. It can effectively solve the problems of high temperature rise, large friction, poor seismic resistance, unstable movement, low life, and poor accuracy of the rotating motor.

[0065] In summary, for this rotating motor and its installation method of the present invention, by adopting an air-floating structure between the rotor and the stator, the relative moving parts are lubricated by gas, with extremely small wear and long life, and can maintain the manufacturing accuracy for a long time; through the error averaging effect of the air film, the overall movement accuracy can be improved; the cooling part is added, which can further reduce the temperature rise of the motor and increase the thrust density of the motor. It can avoid problems such as large friction, poor seismic resistance, unstable movement, poor accuracy, and low life caused by the mechanical rolling bearing structure. At the same time, it can avoid the influence of too high motor temperature on the operation accuracy of the product.

[0066] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be realized that all the equivalent substitutions and obvious changes made by using the description and illustrations of the present invention should be included in the protection scope of the present invention.

[0067] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0068] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the drawings.

[0069] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0070] The terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one of such features.

Claims

1. A rotating electrical machine, characterized in that, It includes a base (1), a housing (2) and a support part (3): The support part (3) includes a fixing part (32) and a support rotating part (33). There is a gap between the fixing part (32) and the support rotating part (33), and multiple throttle orifices are provided at the contact part. Air flows in through the pipeline joint (321), passes through the throttle orifices and is discharged from the exhaust hole (322), forming an air film between the fixing part (32) and the support rotating part (33) to float the support rotating part (32).

2. A rotating electrical machine according to claim 1, characterized in that, A position feedback mounting plate (11) is provided on the base (1), and the housing (2) is fixedly arranged on the base (1); A sealing cover (12) is also provided on the base (1), and a position feedback sensor (111) is fixedly arranged on the feedback mounting plate (11).

3. A rotating electrical machine according to claim 1, characterized in that, The housing (2) includes an outer cover (23), and a cooler (22) and a motor stator (21) are arranged inside the housing (2); The cooler (22) and the outer cover (23) form a sealed cavity, and the motor stator (21) is installed inside the cooler (22).

4. A rotating electrical machine according to claim 3, characterized in that, The cooler (22) is provided with a serpentine cooling pipeline and pipeline inlet and outlet joints (231), and the pipeline inlet and outlet joints (231) are connected to the sealed cavity.

5. A rotating electrical machine according to claim 1, characterized in that, The support part (3) is also provided with a motor rotor (31). The yoke of the motor rotor (31) is fixedly arranged on the support rotating part (33), and a permanent magnet (311) is installed and fixed on the yoke.

6. A rotating electrical machine according to claim 2 or claim 5, characterized in that, The yoke is in a cylindrical structure, and a position feedback unit (312) is provided at the end of the yoke, which cooperates with the position feedback sensor (111) to feedback position data in real time.

7. An installation method for a rotating electrical machine, for a rotating electrical machine according to any one of claims 1 - 6, characterized in that, It includes: Step S1, install the base. A sealing cover and a position feedback mounting plate are provided on the base; Step S2, install the housing. Set the housing on the base. The housing is provided with an outer cover, a cooler and a motor stator; Step S3, install the support part. Set the support part on the housing. The support part is provided with a support fixing part, a support rotating part and a motor rotor.

8. An installation method for a rotating electrical machine according to claim 7, characterized in that, The step S1 includes fixing the position feedback sensor on the position feedback mounting plate.

9. An installation method for a rotating electrical machine according to claim 7, characterized in that, The step S2 includes: Step S21, fix the outer cover and the cooler, set them on the base to form a sealed cavity; Step S22, conduct the sealed cavity with the pipeline inlet and outlet joints; Step S23, closely fit the outer surface of the motor stator with the inner surface of the cooler.

10. An installation method for a rotating electrical machine according to claim 7, characterized in that, The step S3 includes: Step S31, install and fix the support fixing part and the support rotating part. There is a gap between the support fixing part and the support rotating part, and multiple throttle orifices are provided at the contact part. Air flows through the throttle orifices and is discharged from the exhaust hole, forming an air film between the fixing part and the support rotating part. The air film floats the support rotating part; Step S32, install the yoke of the rotor on the support rotating part. The yoke is in a cylindrical structure, and the permanent magnet is installed and fixed on the yoke; Step S33, install and fix the support fixing part on the outer cover; Step S34, mounting the motor rotor on the support rotating member; Step S35, mounting the position feedback unit on the yoke of the motor rotor and connecting it to the position feedback sensor in signal.

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