Direct drive torque motor

Abstract

The utility model provides a kind of direct drive torque motor, the direct drive torque motor includes motor casing, is arranged in the motor casing one end and is fixed with the motor casing base, with the base fixed end cover, the motor casing is provided with cooling flow channel, the axial of the end cover is provided with flow channel entrance and / or flow channel exit, the axial of the end cover, the base is provided with through entering flow channel and discharge flow channel, the flow channel entrance, the entering flow channel, the cooling flow channel, the discharge flow channel and the flow channel exit are connected to form communication passage.The direct drive torque motor of the utility model, by setting flow channel entrance and / or flow channel exit on end cover, thereby as far as possible reduce the radial space occupation of load end and direct drive torque motor, and have more direct more efficient heat dissipation path.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor housing and a direct-drive torque motor. Background Technology

[0002] A direct-drive torque motor is a rotary motor that directly drives the load without intermediate transmission structures. It boasts advantages such as fast response speed, high positioning accuracy, compact structure, and a large hollow shaft. The heat dissipation effect of a direct-drive torque motor directly affects its continuous operating capability; good heat dissipation can improve the continuous operating torque. Currently, the overall heat dissipation of internal rotor direct-drive torque motors mainly focuses on stator cooling, using methods such as passive natural cooling, external active air cooling, internal flow channel air cooling, and internal flow channel water cooling. Different cooling methods have different heat dissipation effects and applicable scenarios. However, existing cooling methods suffer from various problems such as large footprint and poor heat dissipation effect, especially since the cooling devices occupy the radial space of the direct-drive torque motor.

[0003] In view of this, it is necessary to improve the existing direct drive torque motors to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a direct-drive torque motor, which aims to achieve axial conduction of the direct-drive torque motor, shorten the heat dissipation path, reduce the volume of the direct-drive torque motor, and avoid occupying radial space.

[0005] This utility model provides a direct drive torque motor, which includes a motor housing, a base disposed at one end of the motor housing and fixed to the motor housing, and an end cover fixed to the base. A cooling channel is provided inside the motor housing. An inlet and / or an outlet of the channel are provided axially on the end cover. An inlet channel and an outlet channel are provided axially in the end cover and the base. The inlet channel, the inlet channel, the cooling channel, the outlet channel and the outlet channel are connected to form a connecting passage.

[0006] As a further improvement of this utility model, the motor housing is provided with at least two independent cooling channels.

[0007] As a further improvement of this utility model, each of the cooling channels is connected to a channel inlet and a channel outlet.

[0008] As a further improvement of this utility model, the flow channel inlet and / or the flow channel outlet are arranged axially at the other end of the direct drive torque motor.

[0009] As a further improvement of this utility model, the base is provided with a base inlet channel connected to one end of the cooling channel and a base outlet channel connected to the other end of the cooling channel, and the end cover is provided with an end cover inlet channel communicating with the base inlet channel and an end cover outlet channel communicating with the base outlet channel.

[0010] As a further improvement of this utility model, the flow channel inlet is the opening on the side of the end cap entering the flow channel away from the base, and the flow channel outlet is the opening on the side of the end cap exiting the flow channel away from the base.

[0011] As a further improvement of this utility model, the number of the base inlet channel, the base outlet channel, the end cover inlet channel, and the end cover outlet channel are all equal to the number of the cooling channels.

[0012] As a further improvement of this utility model, the number of the base inlet channel, the base outlet channel, the end cover inlet channel, and the end cover outlet channel is one, and the base inlet channel and the base outlet channel are respectively connected to the multiple cooling channels.

[0013] As a further improvement of this utility model, the motor housing is further provided with a housing inlet connecting channel and a housing outlet connecting channel. The housing inlet connecting channel is axially connected to one end of the base inlet channel and the cooling channel, and the housing outlet connecting channel is axially connected to the other end of the base outlet channel and the cooling channel.

[0014] As a further improvement of this utility model, multiple sets of cooling channels are arranged in a circular array along the axis of the motor housing.

[0015] As a further improvement of this utility model, the direct drive torque motor further includes a first sealing element disposed axially between the motor housing and the base.

[0016] As a further improvement of this utility model, the direct drive torque motor further includes a second sealing element disposed axially between the base and the end cover.

[0017] As a further improvement of this utility model, each of the cooling channels includes a plurality of axial channels extending along the axial direction of the motor housing and spaced apart in the circumferential direction, and a plurality of circumferential channels connecting the ends of two adjacent axial channels and extending in the circumferential direction.

[0018] As a further improvement of this utility model, the axial flow channel and the circumferential flow channel are connected in sequence to form an arc-shaped cooling flow channel.

[0019] The beneficial effects of this utility model are as follows: The direct-drive torque motor of this utility model, by setting the flow channel inlet and / or flow channel outlet on the end cover, and utilizing the motor base, end cover, and other components for flow channel design, achieves axial flow of the entire machine. It also boasts advantages such as small size, low environmental impact, and easy material selection. It avoids occupying the radial space of the direct-drive torque motor and provides a more direct and efficient heat dissipation path. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a three-dimensional structural diagram of the direct-drive torque motor of this utility model;

[0022] Figure 2 This is a perspective structural diagram of the direct-drive torque motor of this utility model;

[0023] Figure 3 This is a cross-sectional structural diagram of the direct-drive torque motor of this utility model;

[0024] Figure 4 yes Figure 3 A magnified structural diagram of region A in the middle;

[0025] Figure 5 This is a schematic diagram of the structure of the motor housing of this utility model. Detailed Implementation

[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] like Figures 1 to 5 As shown, the direct-drive torque motor 100 of this utility model includes a motor housing 1, a rotor and a stator disposed within the motor housing 1, a base 2 disposed at one end of the motor housing 1 and fixed to the motor housing 1, an end cover 3 fixed to the end of the base 2 away from the motor housing 1, a first sealing element 4, and a second sealing element 5. An axially penetrating inlet channel and an outlet channel are provided within the end cover 3 and the base 2. An axially arranged channel inlet 6 and / or channel outlet 7 are provided on the end cover 3.

[0030] In this embodiment, the motor housing 1 is columnar, and includes an inner wall 12 and an outer wall 13 arranged axially on the outside of the inner wall 12. A cooling channel 11 is provided inside the motor housing 1. The channel inlet 6, the inlet channel, the cooling channel 11, the outlet channel, and the channel outlet 7 are connected to form a connecting passage.

[0031] In this embodiment, heat dissipation is achieved by introducing gas or coolant into the cooling channel 11 to the motor housing 1 and the stator inside the motor housing 1. Hereinafter, gas and coolant are collectively referred to as fluids. Figure 1 , Figure 2 and Figure 5 The outer wall structure was omitted.

[0032] In this embodiment, the cooling channel 11 is formed between the inner wall 12 and the outer wall 13. In this embodiment, the inner wall 12 and the outer wall 13 can be separately fixedly connected or integrally formed. In a specific embodiment, the cooling channel 11 is formed by a radial inward recess from the outer surface of the inner wall 12.

[0033] By setting the cooling channel 11 inside the motor housing 1, and the cooling channel 11 being realized through the processing of the motor housing 1, if gas is introduced, the gas flow space is all inside the motor housing 1, the flow direction is controllable, and the impact on the external air environment is small.

[0034] The number of cooling channels 11 is at least two, and they are independent of each other. At least two cooling channels 11 are arranged circumferentially at intervals or staggered. By setting multiple cooling channels 11, the distance between each cooling channel 11 is relatively short, and the gas flows through each cooling channel 11. When the temperature is high in the later stage, it can be discharged through the channel outlet 7. Compared with a single channel design, the heat dissipation efficiency can be improved, and the flow resistance of the fluid can be reduced. This significantly reduces the thermal steady-state temperature of the direct drive torque motor 100 under continuous operating torque, greatly improves the electrical insulation life of the motor under continuous operating torque, and reduces the risk of performance degradation caused by high temperature delamination of the rotor magnets of the direct drive torque motor 100. Alternatively, the magnet grade can be reduced to lower the cost under certain performance conditions. This makes the direct drive torque motor 100 applicable to a wider range of scenarios, including high cleanliness and low humidity requirements.

[0035] At least two cooling channels 11 are arranged in a circular array along the axis of the motor housing 1. In this embodiment, there are six cooling channels 11 arranged in a circular array to cover the circumference of the motor housing 1 as much as possible, thereby improving the uniformity of heat dissipation. The multiple cooling channels 11 can be selected to flow independently or in a concentrated manner.

[0036] The number of cooling channels 11 should not be too large. The number of cooling channels 11 needs to take into account both the cooling effect and the complexity of the connection.

[0037] like Figure 5 As shown, in this embodiment, the cooling channel 11 includes at least two axial channels 111 extending axially along the motor housing 1 and spaced apart circumferentially, and a circumferential channel 112 connecting the ends of two adjacent axial channels 111 and extending circumferentially. In this embodiment, by providing at least two circumferentially spaced axial channels 111 in each cooling channel 11, the circumferential coverage area of ​​the motor housing 1 is further increased, thereby improving heat dissipation efficiency.

[0038] The axial flow channel 111 can cover the stator along the axial direction, improving heat dissipation from the stator.

[0039] The circumferential flow channels 112 are alternately arranged at both ends of the axial flow channel 111. In this embodiment, the circumferential flow channels 112 are mainly used to connect the axial flow channels 111. That is, the circumferential flow channels 112 are located on opposite sides of the motor housing 1 along the axial direction. A rounded chamfer is provided at the circumferential flow channels 112 to reduce flow resistance. The shorter cooling flow channel 11 itself can also reduce flow resistance.

[0040] Each cooling channel 11 has a channel inlet end 113 and a channel outlet end 114 at its two ends. The channel inlet end 113 and the channel outlet end 114 are both located at the ends of the axial channel 111 and are located on the same side of the motor housing 1 along the axial direction.

[0041] In this embodiment, the inlet end 113 and the outlet end 114 of the flow channel are located on the same side of the motor housing 1. Therefore, external equipment can be located on the same side of the motor housing 1 without occupying the load end and the radial space of the direct drive torque motor 100. The external equipment can be a gas supply device and a gas return device, or a liquid supply device and a liquid return device.

[0042] In this embodiment, each cooling channel 11 is connected to a channel inlet 6 and a channel outlet 7.

[0043] In one specific embodiment, the flow channel inlet 6 and the flow channel outlet 7 are located at the same end of the direct drive torque motor 100. In this embodiment, the number of axial flow channels 111 of the cooling flow channel 11 is even, and the number of circumferential flow channels 112 is odd. The circumferential flow channels 112 are alternately arranged on both sides of the motor housing 1 in the axial direction. If there are two axial flow channels 111, the cooling flow channel 11 is U-shaped; if there are four axial flow channels 111, the cooling flow channel 11 is bow-shaped. The number of axial flow channels 111 in each cooling flow channel 11 should not be too large to avoid affecting the heat dissipation effect.

[0044] In this embodiment, there are four axial flow channels 111 and three circumferential flow channels 112, forming an overall bow shape.

[0045] In other embodiments, the external devices are not limited to being located at the same end of the direct-drive torque motor 100. For example, they can be located at both ends of the direct-drive torque motor 100, allowing for a wider variety of cooling channel forms 11, such as S-shaped, straight, or spiral or double-spiral shapes surrounding the housing, as long as multiple cooling channels 11 can cover the motor housing 1 as much as possible. Alternatively, the external devices can be located radially from the direct-drive torque motor 100, in which case the channel inlet 6 and channel outlet 7 are exposed radially. In one embodiment, the end cover 3 may only have one of the channel inlets 6 or 7, while the other is located at the other end of the direct-drive torque motor 100 or in the radial direction.

[0046] By placing the flow channel inlet 6 and / or flow channel outlet 7 on the end cover 3, the radial space occupied by the load end and the direct drive torque motor 100 is minimized as much as possible.

[0047] In this embodiment, the motor housing 1 is further provided with a housing inlet connecting channel 14 and a housing outlet connecting channel 15.

[0048] The housing inlet connecting channel 14 extends axially and one end is connected to the channel inlet end 113. The housing outlet connecting channel 15 extends axially and one end is connected to the channel outlet end 114. In this embodiment, the number of housing inlet connecting channels 14 and housing outlet connecting channels 15 is equal to the number of cooling channels 11, and they are respectively connected to the cooling channels 11. In some embodiments, only one housing inlet connecting channel 14 and one housing outlet connecting channel 15 are provided to connect multiple cooling channels 11 circumferentially, so that liquid or gas can be supplied to multiple cooling channels 11 in a centralized manner.

[0049] The specific implementation scheme of setting up a housing inlet connecting flow channel 14 is as follows: the housing inlet connecting flow channel 14 includes an annular flow channel and a direct flow channel that is axially connected to the annular flow channel. The inlet ends 113 of the multiple cooling flow channels 11 are connected to the annular flow channel, and the direct flow channel is used to send fluid into the annular flow channel and then into the cooling flow channel 11. The scheme of setting up a housing outlet connecting flow channel 15 is similar to that of the housing inlet connecting flow channel 14. The annular flow channels of both can be arranged radially at intervals. The implementation scheme of the housing inlet connecting flow channel 14 is not limited to this, as long as it can ensure that one housing inlet connecting flow channel 14 connects multiple cooling flow channels 11. In this embodiment, the housing inlet connecting flow channel 14 and the housing outlet connecting flow channel 15 are located at one end of the cooling flow channel 11. The axial flow channel 111 of the cooling flow channel 11 does not cover the entire axial length of the motor housing 1. The width of the housing inlet connecting flow channel 14 and the housing outlet connecting flow channel 15 is smaller than the width of the axial flow channel 111 to avoid reducing the mechanical strength of the motor housing 1.

[0050] like Figures 2 to 4 As shown, the base 2 has an inlet channel 21 and an outlet channel 22 extending through it along the axial direction. The inlet channel 21 and the outlet channel 22 are respectively connected to the two ends of the cooling channel 11.

[0051] In this embodiment, the base inlet channel 21 is connected to the channel inlet end 113, and the base outlet channel 22 is connected to the channel outlet end 114. More specifically, the housing inlet connecting channel 14 is axially connected to one end of the base inlet channel 21 and the cooling channel 11, and the housing outlet connecting channel 15 is axially connected to the other end of the base outlet channel 22 and the cooling channel 11.

[0052] When there is only one housing inlet connecting channel 14 and one housing outlet connecting channel 15, there is also only one base inlet channel 21 and one base outlet channel 22. However, when there are multiple housing inlet connecting channels 14 and multiple housing outlet connecting channels 15, the number of base inlet channels 21 and multiple base outlet channels 22 can be provided, or each can be set to one. This allows one base inlet channel 21 and one base outlet channel 22 to connect to multiple housing inlet connecting channels 14 and multiple housing outlet connecting channels 15. The form of one base inlet channel 21 or one base outlet channel 22 can be referred to the form of one housing inlet connecting channel 14 described above.

[0053] The first sealing element 4 is arranged axially between the motor housing 1 and the base 2 to seal the base inlet channel 21 and the base outlet channel 22.

[0054] The end cap 3 is provided with an end cap inlet channel 31 and an end cap outlet channel 32 through it along the axial direction. The end cap inlet channel 31 is connected to the base inlet channel 21, and the end cap outlet channel 32 is connected to the base outlet channel 22.

[0055] In this embodiment, the flow channel inlet 6 and the flow channel outlet 7 are used to connect the cooling flow channel 11 with external equipment, and the flow channel inlet 6 and the flow channel outlet 7 are disposed on the end cover 3. In other embodiments, the flow channel inlet 6 and the flow channel outlet 7 may also be disposed on the motor housing 1 or the base 2.

[0056] In this embodiment, the flow channel inlet 6 and the flow channel outlet 7 are axially arranged at the end of the direct drive torque motor 100. Specifically, the flow channel inlet 6 is an opening in the end cover into the flow channel 31 on the side away from the base 2, and the flow channel outlet 7 is an opening in the end cover out of the flow channel 32 on the side away from the base 2. This allows external equipment to be placed on the same side of the direct drive torque motor 100 without occupying the load end or the radial space of the direct drive torque motor 100.

[0057] In this embodiment, there are multiple flow channel inlets 6 and outlets 7. Each cooling flow channel 11 is connected to one flow channel inlet 6 and one flow channel outlet 7. In this embodiment, the number of base inlet flow channel 21, base outlet flow channel 22, end cover inlet flow channel 31, and end cover outlet flow channel 32 are all equal to the number of cooling flow channels. In other embodiments, one flow channel inlet 6 and one flow channel outlet 7 can be configured to simultaneously connect to multiple cooling flow channels 11. For example, if the number of base inlet flow channel 21, base outlet flow channel 22, end cover inlet flow channel 31, and end cover outlet flow channel 32 is one, then the number of flow channel inlets 6 and one flow channel outlet 7 is one. This scheme is convenient for manufacturing. The form of one end cover inlet flow channel 31 or one end cover outlet flow channel 32 can be referred to the form of one housing inlet connecting flow channel 14 described above.

[0058] The second sealing element 5 is arranged axially between the base 2 and the end cover 3 to seal the end cover inlet channel 31 and the end cover outlet channel 32.

[0059] In this embodiment, the first sealing element 4 and the second sealing element 5 can achieve sealing between the motor housing 1, the base 2 and the end cover 3, so as to achieve fluid conduction while avoiding fluid leakage, ensuring airtightness and improving heat dissipation.

[0060] The housing inlet connecting channel 14, the housing outlet connecting channel 15, the base inlet channel 21, the base outlet channel 22, the end cover inlet channel 31, and the end cover outlet channel 32 are all arranged axially, further ensuring that the external equipment is located on one side of the axial direction of the motor housing 1, without occupying the load end and the radial space of the direct drive torque motor 100.

[0061] This utility model discloses a direct-drive torque motor 100. By placing the flow channel inlet 6 and / or flow channel outlet 7 on the end cover 3, and by utilizing the motor base, end cover, and other components for flow channel design, the entire flow channel achieves axial conduction. This design offers advantages such as small size, low environmental impact, and easy material selection. It avoids occupying the radial space of the direct-drive torque motor and provides a more direct and efficient heat dissipation path.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A direct-drive torque motor, characterized in that: The direct-drive torque motor includes a motor housing, a base disposed at one end of the motor housing and fixed to the motor housing, and an end cover fixed to the base. A cooling channel is provided inside the motor housing. An inlet and / or an outlet of the channel are provided axially on the end cover. An inlet channel and an outlet channel are provided axially in the end cover and the base. The inlet channel, the inlet channel, the cooling channel, the outlet channel and the outlet channel are connected to form a connecting passage.

2. The direct-drive torque motor according to claim 1, characterized in that: The motor housing is provided with at least two independent cooling channels.

3. The direct-drive torque motor according to claim 2, characterized in that: Each of the cooling channels is connected to a channel inlet and a channel outlet.

4. The direct-drive torque motor according to claim 2, characterized in that: The flow channel inlet and / or the flow channel outlet are axially disposed at the other end of the direct drive torque motor.

5. The direct-drive torque motor according to claim 3, characterized in that: The base has a base inlet channel connected to one end of the cooling channel and a base outlet channel connected to the other end of the cooling channel. The end cover has an end cover inlet channel communicating with the base inlet channel and an end cover outlet channel communicating with the base outlet channel.

6. The direct-drive torque motor according to claim 5, characterized in that: The flow channel inlet is the opening on the side of the end cap that enters the flow channel away from the base, and the flow channel outlet is the opening on the side of the end cap that exits the flow channel away from the base.

7. The direct-drive torque motor according to claim 5, characterized in that: The number of base inlet channels, base outlet channels, end cover inlet channels, and end cover outlet channels is equal to the number of cooling channels.

8. The direct-drive torque motor according to claim 5, characterized in that: The motor housing is further provided with a housing inlet connecting channel and a housing outlet connecting channel. The housing inlet connecting channel is axially connected to one end of the base inlet channel and the cooling channel, and the housing outlet connecting channel is axially connected to the other end of the base outlet channel and the cooling channel.

9. The direct-drive torque motor according to claim 1, characterized in that: Multiple sets of cooling channels are arranged in a circular array along the axis of the motor housing.

10. The direct-drive torque motor according to claim 1, characterized in that: The direct-drive torque motor further includes a first seal axially disposed between the motor housing and the base, and / or, The direct-drive torque motor also includes a second seal disposed axially between the base and the end cover.

11. The direct-drive torque motor according to claim 1, characterized in that: Each of the cooling channels includes a plurality of axial channels extending axially along the motor housing and spaced apart circumferentially, and a plurality of circumferential channels connecting the ends of two adjacent axial channels and extending circumferentially.

12. The direct-drive torque motor according to claim 11, characterized in that: The axial flow channel and the circumferential flow channel are connected in sequence to form an arc-shaped cooling flow channel.

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