A water-cooled motor

Abstract

The present application relates to a water-cooled motor, which is applied in the field of motors, and includes a motor rotor; an armature, which is arranged inside or around the motor rotor; a casing, which is arranged around the motor rotor and the armature; a front cover and a rear cover, which are respectively arranged at both ends of the casing; a water-cooling structure, which is arranged inside the casing; a control system, wherein the control system is configured with an algorithm for increasing the water-cooling width, which is used to control the water-cooling width of the water-cooling structure, and the water-cooling structure realizes effective cooling of the motor rotor and the armature through a specific layout in the casing. When the motor is running, the armature and the rotor generate heat, and the coolant is introduced through the water pipe system of the water-cooling structure to realize effective transfer and dissipation of heat. The water pipe flange and the water pipe sealing ring ensure that the cooling system remains sealed and stable under high temperature and high pressure, and avoids leakage of coolant, thereby ensuring cooling efficiency. The control system dynamically adjusts the water flow speed and path by monitoring the real-time temperature of the motor and adjusting the algorithm of the water-cooling width to adapt to different operating conditions and cooling requirements.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a water-cooled motor. Background Art

[0002] Motor overheating is a key issue that limits the thrust density output of the motor, threatens the safe operation of the motor, and restricts the application scenarios of the motor. The motor needs to meet the application requirements of different working conditions such as wide load changes, short-term high overload, and long-term operation. Under different performance requirements, the temperature rise of the motor varies greatly. At the same time, the relationship between the electric, magnetic, and thermal inside the motor affects and restricts each other, which is very complicated. Especially when the linear motor is running in the overloaded state, if the motor has no effective cooling measures, it can only run in short-term or periodic operation conditions, which greatly limits the application scenarios of linear motors.

[0003] The heating parts of the motor that need attention under different operating conditions are different. When the motor is running in normal stroke, generally only the heating condition of the primary side of the motor is concerned. When the motor is running in short stroke, it is equivalent to the heating coil heating the corresponding permanent magnet for a long time. The heating condition of the secondary permanent magnet needs to be considered at the same time. If the temperature rise of the permanent magnet is too high, it will inevitably affect the air gap magnetic flux density of the motor, thereby affecting the electromagnetic performance of the motor. Summary of the invention

[0004] The purpose of the present invention is to provide a water-cooled motor to solve the above-mentioned technical problems.

[0005] Technical solution: A water-cooled motor, the motor comprising:

[0006] Motor rotor;

[0007] An armature, arranged inside or around the motor rotor;

[0008] A casing, the casing being arranged around the motor rotor and the armature;

[0009] A front cover and a rear cover, wherein the front cover and the rear cover are respectively arranged at two ends of the housing;

[0010] A water cooling structure, wherein the water cooling structure is arranged inside the casing;

[0011] A water pipe is arranged on the water cooling structure;

[0012] A water pipe flange and a water pipe sealing ring, wherein the water pipe flange is connected to the water pipe, and the water pipe sealing ring is used to ensure the seal between the water pipe and the water pipe flange;

[0013] A control system is provided with an algorithm for increasing the water cooling width, and is used for controlling the water cooling width of the water cooling structure.

[0014] In a specific possible implementation manner, the control system includes a temperature sensor, which is used to monitor the temperature of the water cooling structure and adjust the water cooling width according to the monitored temperature data.

[0015] In a specific possible implementation scheme, the algorithm for increasing the water cooling width adjusts the water flow rate based on feedback from a temperature sensor, and the temperature sensor is arranged near the motor rotor and armature;

[0016] The formula for increasing the water cooling width to improve the motor cooling effect is as follows:

[0017]

[0018] Where: The energy taken away by the coolant (W);

[0019] is the flow coefficient (W / K* )

[0020] is the heat dissipation area ( );

[0021] is the temperature difference between the coolant and the inner wall of the casing (°C).

[0022] In a specific embodiment,

[0023] The control system includes a processor and a storage device, wherein the storage device stores a program for executing the algorithm.

[0024] In a specific possible implementation scheme, the water cooling structure is an axial Z-shaped water channel;

[0025] The relationship between the heat dissipation area and the width of the axial Z-shaped water channel is:

[0026]

[0027] Where: n is the number of waterways; is the axial length of a single waterway; is the total length of the waterway (m); is the average diameter of the waterway;

[0028] L* ;

[0029] When the height b of the water channel is greater than the width m of the water barrier, the heat dissipation area A of the water channel is inversely proportional to the width a of the water channel;

[0030] When the height b of the water channel is less than the width m of the water barrier, the heat dissipation area A of the water channel is proportional to the width a of the water channel;

[0031] When the height b of the water channel is equal to the width m of the water barrier, the heat dissipation area A of the water channel has nothing to do with the width a of the water channel.

[0032] In a specific possible implementation, the water cooling plate is made of aluminum alloy material to improve heat conduction performance.

[0033] In a specific possible implementation scheme, the housing includes a housing body, a cooling chamber and a fixing portion arranged on the housing body;

[0034] The cooling chamber is used to cool the casing;

[0035] The fixing parts are located at two ends of the housing;

[0036] The fixing part is respectively fixed to the front cover and the rear cover;

[0037] A heat insulation layer is disposed outside the casing, wherein the heat insulation layer is used to reduce heat exchange between the casing and the external environment.

[0038] In a specific possible implementation scheme, the water pipe flange has a quick connection feature to facilitate quick installation and removal and maintenance of the water pipe; and a heat insulation layer is provided between the motor rotor and the armature to reduce heat conduction to the casing.

[0039] In a specific embodiment, the front end cover includes a plurality of radially arranged ventilation slots, the ventilation slots extending outward from the center of the front end cover to the edge, for enhancing air flow;

[0040] The front end cover is made of a thermally conductive material to facilitate heat transfer from the inside of the motor to the outside;

[0041] An integrated radiator and a heat conduction enhancement module are provided inside the rear end cover. The radiator includes a plurality of aluminum fins for removing heat from the inside of the motor by natural convection and radiation. At the same time, the outer surface of the rear end cover is designed to increase the heat dissipation area.

[0042] The heat conduction enhancement module is in close contact with the motor stator through the inner side of the rear end cover;

[0043] wherein the front end cover has a plurality of convection holes and a central cooling channel, the central cooling channel being designed to direct the cooling fluid to flow directly through the hot spot area of ​​the motor;

[0044] The edge portions of the front cover and the rear cover are provided with heat dissipation fins for increasing the surface area in contact with the ambient air.

[0045] In summary, the present application has the following beneficial technical effects: The water-cooled motor design of the present application makes the cooling of the motor more efficient and controllable. Through the built-in water cooling structure and intelligent control system, the cooling demand can be dynamically adjusted according to the actual operating state of the motor, thereby optimizing the performance of the motor and extending its service life. In addition, through effective thermal management, energy consumption is reduced and overall energy efficiency is improved, which is particularly suitable for industrial applications that require long-term operation and high load. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the structure of the present invention;

[0047] Figure 2 It is the relationship curve between the convective heat transfer coefficient h and the water channel width a;

[0048] Figure 3 It is a front view of the present invention;

[0049] Figure 4 for Figure 3 Cross-sectional view at AA in the middle.

[0050] Figure numerals: 1. motor rotor; 2. armature; 3. housing; 4. front cover; 5. rear cover; 6. water cooling structure; 7. water pipe. DETAILED DESCRIPTION

[0051] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0052] Reference Figure 1 A water-cooled motor includes a motor rotor, an armature, a casing, a front cover, a rear cover, and a water-cooling structure. The armature is arranged inside or around the motor rotor, the casing is arranged around the motor rotor and the armature, and the front cover and the rear cover are respectively arranged at both ends of the casing. The water-cooling structure is arranged inside the casing and is equipped with a water pipe, a water pipe flange and a water pipe sealing ring arranged thereon to ensure the sealing between the water pipe and the water pipe flange. In addition, the motor also includes a control system, which is configured with an algorithm for increasing the water-cooling width, and is used to control the water-cooling width of the water-cooling structure as needed.

[0053] In one embodiment, the casing includes a casing body, on which a plurality of cooling chambers and fixing parts are provided. These cooling chambers are designed to cool the casing, and effectively help dissipate the heat generated from the motor or other internal components by increasing the air circulation inside the casing body or introducing a cooling medium, such as a coolant. The fixing parts are located at both ends of the casing, and are connected to the front cover and the rear cover respectively. The fixing parts use bolts, welding or other mechanical fastening techniques to ensure a firm connection between the casing and the end cover, while providing structural support to ensure the stability and durability of the entire device. The design of the fixing part may also take into account the ease of assembly and maintenance, allowing the end cover to be quickly disassembled for the inspection or replacement of internal components. The outside of the casing is provided with an insulation layer, and this insulation material is added to reduce the heat exchange between the casing and the external environment. The insulation layer is made of a highly efficient insulation material, using reflective metal foil, ceramic fiber or high-performance plastic, which can effectively block heat flow and help keep the temperature inside the casing stable. In this way, the insulation not only protects the internal components from damage due to excessive temperatures, but also helps improve energy efficiency because the cooling system inside the housing does not have to work overtime to resist the thermal effects of the external environment. The design of the housing of the present application fully considers thermal management and structural stability, enabling it to maintain excellent performance and reliability under various operating conditions. The motor can operate safely in a wider range of ambient temperatures while reducing energy consumption and maintenance costs.

[0054] Specifically, the water pipe flange has a quick connection feature to facilitate the rapid loading and unloading and maintenance of the water pipe. The present application adopts a quick connection flange design to utilize a convenient mechanical interface, using a snap, a spring device or a rotary locking mechanism, so that the water pipe can be quickly and easily connected or separated from the corresponding connection part. The quick connection flange is usually made of corrosion-resistant and high-strength materials, which not only provides structural stability but also ensures safe contact with various types of fluids. The design of the flange allows it to withstand a certain pressure without leakage, which is crucial for maintaining the sealing of the system. In addition, the design of the flange of the present application may also include a sealing ring or gasket to enhance the sealing effect during the connection process and prevent water or other fluids from leaking. The sealing ring is made of rubber, silicone or other flexible materials to adapt to different temperatures and chemical properties. The use of quick connection flanges greatly simplifies the installation and maintenance process of the pipeline system, allowing operators to quickly complete the loading and unloading of the pipeline without using tools.

[0055] Specifically, a heat insulating layer is provided between the motor rotor and the armature to reduce heat conduction to the casing; the motor rotor is provided with a slot structure to facilitate installation of insulating materials, thereby reducing heat loss during operation of the motor.

[0056] The water cooling structure of the present application is arranged inside the casing, and its main function is to remove the heat generated by the motor through water flow to maintain the working temperature of the motor within an ideal range. Water pipes are arranged on the water cooling structure, and the water flow circulating through the water pipes can effectively absorb and remove heat. The water pipes are connected to the water cooling structure through water pipe flanges, and are equipped with water pipe sealing rings to ensure the sealing of the connection to prevent cooling water leakage from affecting the normal operation of the motor.

[0057] The control system is equipped with an algorithm to increase the water cooling width. The algorithm can dynamically adjust the water cooling width of the water cooling structure according to the working status and cooling requirements of the motor, thereby optimizing the cooling effect. Specifically, the control system includes a temperature sensor, which is installed near the motor rotor and armature to monitor the temperature of the water cooling structure. Based on the monitored temperature data, the control system can adjust the water flow rate and calculate the required water cooling width according to the following formula:

[0058]

[0059] Where: The energy taken away by the coolant (W);

[0060] is the flow coefficient (W / K* )

[0061] is the heat dissipation area ( );

[0062] is the temperature difference between the coolant and the inner wall of the casing (°C).

[0063] The control system of the present application includes a processor and a storage device, wherein the storage device stores a program for executing the algorithm. The water cooling structure is an axial Z-shaped water channel; the relationship between the heat dissipation area and the water channel width of the axial Z-shaped water channel is:

[0064]

[0065] Where: n is the number of waterways; is the axial length of a single waterway; is the total length of the waterway (m); is the average diameter of the waterway;

[0066] L* ;

[0067] When the height b of the water channel is greater than the width m of the water barrier, the heat dissipation area A of the water channel is inversely proportional to the width a of the water channel; when the height b of the water channel is less than the width m of the water barrier, the heat dissipation area A of the water channel is directly proportional to the width a of the water channel; when the height b of the water channel is equal to the width m of the water barrier, the heat dissipation area A of the water channel has nothing to do with the width a of the water channel. In engineering practice, the height b of the water channel and the width m of the water barrier are usually nearly equal, and the axial length of the motor and the average diameter of the water channel have been determined by the electromagnetic calculation scheme, so the heat dissipation area of ​​the water channel is a fixed value. When the flow rate Q is constant, it can be deduced according to the fluid similarity criterion;

[0068]

[0069] Where: α — thermal conductivity of water (W / (Km));

[0070] Nu—is the Nusselt number, which can be obtained according to the Mikheev formula:

[0071] =0.021* ;

[0072] Pr is the Brank constant of water, with the unit of 1; is the Blanc constant at the water channel wall temperature;

[0073] is the Blanc constant for the water at the chosen temperature; usually these two values ​​are close, so = ;

[0074] =0.021*

[0075] is the characteristic size of the waterway. When the waterway is a non-circular pipe, the equivalent diameter calculation formula of the waterway is:

[0076] =4 ;

[0077] Where: S is the cross-sectional area of ​​the waterway (m), and the calculation formula is S=a*b

[0078] P is the circumference of the waterway section (m), and the calculation formula is P=2(a+b);

[0079] is the fluid Reynolds number, and the calculation formula is = , where is the fluid velocity (m / s);

[0080] The calculation formula is: = , where τ is the kinematic viscosity coefficient of water;

[0081] Substituting into the above formula, we can deduce that the relationship between the convective heat transfer coefficient h and the water channel width a is:

[0082] ;

[0083] The convective heat transfer coefficient and the change of the width of the water channel are obtained. The convective heat transfer coefficient h of the axial Z-shaped water channel water-cooled motor housing water channel is inversely proportional to the water channel width. The water channel width a is inversely proportional to the water channel width. As the number of water channels increases, the width of the water channel becomes narrower, the convective heat transfer coefficient of the water channel increases, and the heat dissipation capacity of the water channel is enhanced. Figure 2 shown.

[0084] In addition, the control system also includes a processor and a storage device, and the storage device stores a program for executing the above algorithm to achieve intelligent control of the water cooling width.

[0085] As a preferred case, the water cooling structure presents an axial Z-shaped water channel. This design helps to increase the surface area of ​​contact between the water flow and the casing, thereby improving the heat exchange efficiency. The design of the Z-shaped water channel makes the relationship between the heat dissipation area and the width of the water channel vary according to the height of the water channel. If the water channel height is greater than the width of the water barrier, the heat dissipation area is inversely proportional to the width of the water channel; if it is less than the width of the water barrier, it is directly proportional; if it is equal to the width of the water barrier, the two are unrelated. This design allows the water channel size to be adjusted according to actual cooling needs, achieving more efficient thermal management.

[0086] The front cover of the present application includes a plurality of radially arranged ventilation slots extending outward from the center of the front cover to the edge to enhance air flow. This design utilizes the layout of the ventilation slots to promote air flow through the motor, thereby helping to dissipate heat and reduce internal temperature. The front cover is made of thermally conductive materials, such as aluminum or copper, which can effectively absorb heat from the inside of the motor and transfer it to the outside, thereby reducing the operating temperature of the motor.

[0087] In addition, an integrated heat sink and heat conduction enhancement module are provided inside the rear end cover. The heat sink includes a plurality of aluminum fins, which take away heat from the inside of the motor by natural convection and radiation. These fins are designed to increase the surface area to improve the heat dissipation efficiency. The outer surface of the rear end cover is specially designed to increase the heat dissipation area, for example, by adding protrusions or fins, which can increase the contact area with the ambient air, thereby dissipating heat more effectively.

[0088] The heat conduction enhancement module is realized by closely contacting the motor stator on the inner side of the rear end cover. This design ensures that the heat transfer from the stator to the rear end cover is more direct and efficient, thereby further improving the heat dissipation performance. The front end cover also has several convection holes and a central cooling channel, which is designed to guide the cooling fluid to flow directly through the hot spot area of ​​the motor. The present application allows cooling fluids such as water or other cooling media to directly reach the hottest parts of the motor, effectively controlling the temperature of these areas. In addition, the edge portions of the front end cover and the rear end cover are provided with special heat dissipation fins, which further enhance the heat dissipation function by increasing the contact surface area with the ambient air. To optimize air flow and maximize heat exchange efficiency. The present application adopts a comprehensive heat dissipation design that not only effectively manages the thermal load of the motor, but also improves the reliability and performance of the overall equipment and extends the service life of the motor. Through these design improvements, the present application significantly improves the operating safety and efficiency of the motor under high load or high temperature environments.

[0089] Working principle: The water cooling structure achieves effective cooling of the motor rotor and armature through a specific layout inside the casing. When the motor is running, the armature and rotor generate heat, and the coolant is introduced through the water pipe system of the water cooling structure to achieve effective heat transfer and dissipation. The water pipe flange and water pipe sealing ring ensure that the cooling system remains sealed and stable under high temperature and high pressure, avoiding coolant leakage, thereby ensuring cooling efficiency. The control system dynamically adjusts the water flow speed and path to adapt to different operating conditions and cooling requirements by monitoring the real-time temperature of the motor and adjusting the algorithm of the water cooling width.

[0090] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and details may be made without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A water-cooled motor, characterized in that: The motor comprises: Motor rotor; An armature, arranged inside or around the motor rotor; A casing, the casing being arranged around the motor rotor and the armature; A front cover and a rear cover, wherein the front cover and the rear cover are respectively arranged at two ends of the housing; A water cooling structure, wherein the water cooling structure is arranged inside the casing; A water pipe is arranged on the water cooling structure; A water pipe flange and a water pipe sealing ring, wherein the water pipe flange is connected to the water pipe, and the water pipe sealing ring is used to ensure the seal between the water pipe and the water pipe flange; A control system, wherein the control system is configured with an algorithm for increasing the water cooling width and is used to control the water cooling width of the water cooling structure; The control system includes a temperature sensor, which is used to monitor the temperature of the water cooling structure and adjust the water cooling width according to the monitored temperature data; the water cooling width includes the width a of the water channel and the width m of the water barrier; The algorithm for increasing the water cooling width adjusts the water flow rate based on feedback from a temperature sensor, the temperature sensor being arranged near the motor rotor and armature; The formula for the effect of increasing the water cooling width on the motor cooling effect is as follows: Where: The energy taken away by the coolant (W); is the flow coefficient (W / (K ) is the heat dissipation area ( ); is the temperature difference between the coolant and the inner wall of the casing (°C); The control system includes a processor and a storage device, wherein the storage device stores a program for executing the algorithm; The water cooling structure is an axial Z-shaped water channel; The relationship between the heat dissipation area and the width of the axial Z-shaped water channel is: Where: n is the number of waterways; is the axial length of a single waterway; is the total length of the waterway (m); is the average diameter of the waterway; L ； When the height b of the water channel is greater than the width m of the water barrier, the heat dissipation area A of the water channel is inversely proportional to the width a of the water channel; When the height b of the water channel is less than the width m of the water barrier, the heat dissipation area A of the water channel is proportional to the width a of the water channel; When the height b of the water channel is equal to the width m of the water barrier, the heat dissipation area A of the water channel has nothing to do with the width a of the water channel.

2. The water-cooled motor according to claim 1, characterized in that: The housing comprises a housing body, a plurality of cooling chambers and a fixing portion arranged on the housing body; The cooling chamber is used to cool the casing; The fixing parts are located at two ends of the housing; The fixing part is respectively fixed to the front cover and the rear cover; A heat insulation layer is disposed outside the casing, wherein the heat insulation layer is used to reduce heat exchange between the casing and the external environment.

3. The water-cooled motor according to claim 1, characterized in that: The water pipe flange has a quick connection feature to facilitate quick assembly and disassembly and maintenance of the water pipe; a heat insulation layer is provided between the motor rotor and the armature to reduce heat conduction to the casing.

4. The water-cooled motor according to claim 1, characterized in that: The front end cover includes a plurality of radially arranged ventilation slots extending outwardly from the center of the front end cover to the edge for enhancing air flow; The front end cover is made of a thermally conductive material to facilitate heat transfer from the inside of the motor to the outside; An integrated radiator and a heat conduction enhancement module are provided inside the rear end cover. The radiator includes a plurality of aluminum fins for removing heat from the inside of the motor by natural convection and radiation. At the same time, the outer surface of the rear end cover is designed to increase the heat dissipation area. The heat conduction enhancement module is in close contact with the motor stator at the inner side of the rear end cover; wherein the front end cover has a plurality of convection holes and a central cooling channel, the central cooling channel being designed to direct the cooling fluid to flow directly through the hot spot area of ​​the motor; The edge portions of the front cover and the rear cover are provided with heat dissipation fins for increasing the surface area in contact with the ambient air.

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