Double-support heat compensation reverse planetary roller screw servo electric cylinder

Abstract

This invention relates to the field of servo cylinder technology, specifically disclosing a dual-support thermally compensated reverse planetary roller screw servo cylinder, comprising: a cylinder body, a cooling water channel system, and a circulation device. The cylinder body has, along its axial direction, a front functional area, a motor area, a rear functional area, a functional cavity, and an electronic control cavity. The cooling water channel system is located within the cylinder body and distributed across the front, motor, and rear functional areas. The circulation device is located within the functional cavity, which is connected to the cooling water channel system. This invention achieves zoned thermal management of different areas by setting up a cooling water channel system within the cylinder body and distributing it across the front, motor, and rear functional areas. The motor area serves as the main heat exchange area, while the front and rear functional areas serve as localized temperature regulation areas, clearly defining the thermal management path.

Description

Technical Field

[0001] This invention relates to the field of servo electric cylinder technology, specifically a dual-support thermally compensated reverse planetary roller screw servo electric cylinder. Background Technology

[0002] As an actuator that converts rotary motion into linear motion, the reverse planetary roller screw servo electric cylinder has the advantages of high transmission efficiency, large load capacity, high positioning accuracy and fast response speed, and has been widely used in automated equipment, precision actuators and high load drive scenarios. In existing reverse planetary roller screw servo cylinders, the motor area is typically the main heat-generating region during operation, easily generating high levels of heat. Simultaneously, the guiding, sealing, and support components in the front and rear functional areas are also highly sensitive to temperature changes. Under high-temperature conditions, localized heat accumulation may affect the overall thermal balance and operational stability of the machine; under low-temperature conditions, the front and rear functional areas may experience insufficient temperature rise and slow recovery from operational issues, thus impacting the overall starting performance and operational consistency of the machine. In existing technologies, some solutions mainly focus on heat dissipation under high-temperature conditions, relying more on a single cooling method, making it difficult to meet the heating and temperature equalization requirements under low-temperature conditions. At the same time, existing technologies rarely integrate the liquid circulation structure, the shear heating structure in the functional cavity, and the flow path switching structure under different operating conditions into a single design, resulting in a lack of effective adaptive switching capability between high-temperature heat dissipation and low-temperature heating. Therefore, it is necessary to provide a dual-support thermally compensated reverse planetary roller screw servo cylinder to achieve priority heat dissipation of the motor area, temperature regulation of the front and rear functional areas, and switching of liquid circulation modes under different temperature conditions, thereby improving the adaptability and operational stability of the whole machine. Summary of the Invention

[0003] The purpose of this invention is to provide a dual-support thermally compensated reverse planetary roller screw servo electric cylinder to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a dual-support thermally compensated reverse planetary roller screw servo electric cylinder, comprising: an electric cylinder body, a cooling water channel system and a circulation device, wherein the electric cylinder body is provided with a front functional area, a motor area, a rear functional area, a functional cavity and an electronic control cavity in sequence along the axial direction, the cooling water channel system is disposed in the electric cylinder body and distributed in the front functional area, the motor area and the rear functional area, the circulation device is disposed in the functional cavity and the functional cavity is connected to the cooling water channel system.

[0005] Preferably, the circulation device includes: a housing, a motor, a countershaft, a moving plate, at least one fixed plate, a limiting slide rod, a first reset member, and at least one drive assembly. The housing is disposed within the functional cavity, the motor is disposed outside the housing, the countershaft is connected to the motor and extends into the housing, the moving plate is disposed on the countershaft and located inside the housing, at least one fixed plate is slidably disposed on the countershaft and located on one side of the moving plate, the limiting slide rod is disposed between the inner wall of the housing and at least one fixed plate and is arranged along the axial direction of the countershaft, the first reset member is disposed on the limiting slide rod and connected to at least one fixed plate, and at least one drive assembly is disposed inside the housing and corresponds to and cooperates with at least one fixed plate.

[0006] Preferably, the drive assembly includes: a first drive disk, a second drive disk, a connecting ring, a swing arm, and a second reset member. The first drive disk is connected to at least one fixed disk, the second drive disk is connected to the housing and is disposed opposite to the first drive disk, the connecting ring is disposed on the secondary shaft, one end of the swing arm is hinged to the connecting ring, and the second reset member is connected between the swing arm and the connecting ring.

[0007] Preferably, at least one fixed plate is provided with a limiting ring on the side facing the moving plate.

[0008] Preferably, the outer wall of the housing is provided with an inlet pipe and a return pipe, and the outer periphery of the moving disk is provided with blades. The inlet pipe is arranged in correspondence with the low-pressure liquid absorption area formed by the rotation of the moving disk, and the return pipe is arranged in correspondence with the high-pressure liquid discharge area formed by the rotation of the moving disk. The inlet pipe and the return pipe are arranged tangentially along the outer periphery of the moving disk and are spaced apart by a predetermined angle along the circumference.

[0009] Preferably, at least one of the fixed disks and the moving disks has a flow guiding structure or a flow turbulence structure on its surface to enhance the shearing effect of the liquid. The flow guiding structure or flow turbulence structure is at least one of the following: annular shallow groove, concentric flow guiding groove, micro-protrusion rib, shear rib, or roughened working surface.

[0010] Preferably, the relative force-bearing positions of the first drive disc and the second drive disc are provided with an inlet ramp, and the end of the swing arm facing the first drive disc and the second drive disc is provided with a wedge-shaped structure adapted to the inlet ramp.

[0011] Preferably, the end face of the swing arm that contacts the first drive disc and the second drive disc is provided with a rolling contact element, which is at least one of a ball, a roller or a needle roller.

[0012] Preferably, the first reset component is a compression spring, wave spring, or butterfly spring assembly sleeved on the outer periphery of the limiting slide bar, and the second reset component is a tension spring, torsion spring, or spring sheet. The second reset component is connected between the swing arm and the connecting ring.

[0013] Preferably, the outer side of the housing is provided with a heat dissipation area, the heat dissipation area is provided with swingable fins, at least one fixed plate is provided with a driving magnet on its outer periphery, and a first driven magnet and a second driven magnet are provided on the inner side of the swingable fins. The magnetic pole of the first driven magnet pointing to the inner end face of the housing is opposite to the magnetic pole of the second driven magnet pointing to the inner end face of the housing.

[0014] The present invention proposes a dual-support thermally compensated reverse planetary roller screw servo cylinder, the advantages of which are: 1. This invention achieves zoned thermal management of different areas by setting up a cooling water channel system in the main body of the electric cylinder and distributing it in the front functional area, the motor area and the rear functional area. The motor area serves as the main heat exchange area, while the front and rear functional areas serve as local temperature regulation areas, and the thermal management path is clear.

[0015] 2. By setting up a moving plate, at least one fixed plate, and a driving component, the present invention can reduce the non-contact working gap between the fixed plate and the moving plate under low temperature conditions, so that the liquid generates shear heat within the working gap, thereby increasing the liquid temperature, and using the heated liquid to preferentially equalize the temperature of the front and rear functional areas.

[0016] 3. By setting a first thermal valve and a second thermal valve, and cooperating with a third connecting path and a fourth connecting path, the present invention can switch the distribution relationship of liquid between the main cooling path and the front and rear functional area branches according to temperature changes, thereby realizing automatic switching between high temperature heat dissipation mode and low temperature heating mode.

[0017] 4. By setting up heat dissipation zones and swingable fins, and using the correspondence between the driving magnet and the first and second driven magnets to control the opening and closing of the fins, the heat dissipation area can be increased under high-temperature conditions and the heat loss can be reduced under low-temperature conditions, thereby further improving the liquid thermal management effect.

[0018] 5. This invention integrates the cooling water system, circulation device, thermal valve, drive components and fin adjustment structure into a single design, which can achieve priority heat dissipation in the motor area and priority heating in the front and rear functional areas, taking into account both high and low temperature operating conditions, and has good engineering applicability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front view of the structure of the present invention; Figure 3 This is a schematic diagram of the circulation device of the present invention; Figure 4 This is a schematic diagram of the driving component of the present invention; Figure 5 This is the main view of the driving component of the present invention; Figure 6This is a partial schematic diagram of the circulation device of the present invention; Figure 7 This is a partially enlarged schematic diagram of the circulation device of the present invention.

[0020] In the diagram: 1. Electric cylinder body; 11. Front functional area; 12. Motor area; 13. Rear functional area; 14. Functional cavity; 15. Electrical control cavity; 2. Cooling water system; 201. Upper cooling channel; 202. Front upper branch; 203. Front lower branch; 204. First connecting path; 205. Lower cooling channel; 206. Rear lower branch; 207. Rear upper branch; 208. Second connecting path; 209. Liquid inlet channel; 210. Liquid return channel; 211. Third connecting path; 212. Fourth connecting path; 213. First thermal valve; 214. Second thermal valve; 215. Check valve; 3. 301. Circulation device; 302. Housing; 303. Heat dissipation area; 304. Liquid inlet pipe; 305. Liquid return pipe; 306. Motor; 307. Countershaft; 308. Moving plate; 309. Fixed plate; 310. Limiting slide bar; 311. First reset component; 311. Drive assembly; 3111. First drive plate; 3112. Second drive plate; 3113. Connecting ring; 3114. Swing arm; 3115. Second reset component; 3116. Rolling contact component; 312. Fin; 313. Drive magnet; 314. First driven magnet; 315. Second driven magnet; 316. Limiting ring. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-7 This invention provides a technical solution for a dual-support thermally compensated reverse planetary roller screw servo electric cylinder. Its detailed connection method is a well-known technology in the field. The working principle and process are mainly described below. The specific work is as follows.

[0023] This embodiment uses a reverse planetary roller screw servo electric cylinder as the basic actuator. The original screw transmission output structure can adopt the existing reverse planetary roller screw structure. The improvement of this embodiment is mainly in the liquid thermal management structure set in the electric cylinder body 1 and the circulation device 3 set in the functional cavity 14.

[0024] The electric cylinder body 1 is provided with a front functional area 11, a motor area 12, a rear functional area 13, a functional cavity 14 and an electronic control cavity 15 in sequence along the axial direction; the electric cylinder body 1 is also provided with a cooling water channel system 2, which is distributed in the front functional area 11, the motor area 12 and the rear functional area 13, and a circulation device 3 is provided in the functional cavity 14, which is connected to the cooling water channel system 2.

[0025] The front functional area 11 is located at the front of the electric cylinder body 1 and is used to arrange functional components closely related to the operating state of the output end. The front functional area 11 can accommodate guide components, sealing components and front support components to ensure the guiding stability, sealing and support stability of the output end during the extension and retraction process. The motor area 12 is located between the front functional area 11 and the rear functional area 13 and is the middle area of ​​the electric cylinder body 1. The motor area 12 corresponds to one of the main heat-generating areas of the whole machine and is also the main heat exchange coverage area of ​​the cooling water channel system 2. The rear functional area 13 is located between the motor area 12 and the functional cavity 14 and is used to arrange the rear support, transition connection and related structures connected to the functional cavity 14. The rear functional area 13 is also equipped with the cooling water channel system 2 for temperature regulation of the components in the rear functional area 13. The functional cavity 14 is located after the rear functional area 13 and is used to accommodate the circulation device 3. The electrical control cavity 15 is located at the very end and is used to accommodate the control circuit board and related electrical connectors.

[0026] The cooling water channel system 2 forms flow channels on the inner wall of the electric cylinder body 1 or the corresponding mounting wall, and forms a closed liquid flow path in conjunction with the closed structure. Specifically, the cooling water channel system 2 includes an upper cooling channel 201, a front upper branch 202, a front lower branch 203, a first connecting channel 204, a lower cooling channel 205, a rear lower branch 206, a rear upper branch 207, a second connecting channel 208, a liquid inlet channel 209, a liquid return channel 210, a third connecting channel 211, a fourth connecting channel 212, a first thermal valve 213, a second thermal valve 214, and a one-way valve 215.

[0027] The liquid inlet pipe 303 is connected to the liquid inlet channel 209, the liquid inlet channel 209 is connected to the upper cooling channel 201, one side of the upper cooling channel 201 is connected to the front upper branch 202, and the other side is connected to the rear upper branch 207. The front upper branch 202 is connected to the front lower branch 203 through the first connecting road 204. The front lower branch 203 is connected to the lower cooling channel 205. The lower cooling channel 205 is connected to the rear lower branch 206. The rear lower branch 206 is connected to the rear upper branch 207 through the second connecting road 208. The liquid return channel 210 is connected to the lower cooling channel 205, and the liquid return pipe 304 is connected to the liquid return channel 210, which is used to guide the liquid back to the functional chamber 14.

[0028] In terms of spatial coverage, the upper cooling channel 201 and the lower cooling channel 205 cover the motor area 12, the front upper branch 202, the front lower branch 203 and the first connecting road 204 cover the front functional area 11, and the rear upper branch 207, the rear lower branch 206 and the second connecting road 208 cover the rear functional area 13. Thus, the motor area 12 forms the main heat exchange channel in the middle, and the front functional area 11 and the rear functional area 13 respectively form local circulating heat exchange channels on both sides.

[0029] In order to restrict the reverse flow of liquid and ensure that the liquid flows into the lower cooling channel 205 in a predetermined direction, a one-way valve 215 is provided between the front lower branch 203 and the lower cooling channel 205, and another one-way valve 215 is provided between the rear lower branch 206 and the lower cooling channel 205.

[0030] A third connecting passage 211 is provided between the front upper branch 202, the upper cooling channel 201, the front lower branch 203, and the lower cooling channel 205. The connection between the third connecting passage 211 and the front lower branch 203 and the lower cooling channel 205 is located between the one-way valve 215 and the lower cooling channel 205. A fourth connecting passage 212 is provided between the rear upper branch 207, the upper cooling channel 201, the rear lower branch 206, and the lower cooling channel 205. The connection between the fourth connecting passage 212 and the rear lower branch 206 and the lower cooling channel 205 is located between another one-way valve 215 and the lower cooling channel 205. With the above arrangement, in addition to forming the main branch circulation of the front functional area 11 and the rear functional area 13 through the first connecting passage 204 and the second connecting passage 208, the liquid can also form a bypass adjustment path connected to the upper cooling channel 201 and the lower cooling channel 205 through the third connecting passage 211 and the fourth connecting passage 212.

[0031] A first thermal valve 213 is provided between the front upper branch 202, the upper cooling channel 201 and the third connecting channel 211, and a second thermal valve 214 is provided between the rear upper branch 207, the upper cooling channel 201 and the fourth connecting channel 212. The first thermal valve 213 is used to adjust the distribution relationship of liquid between the front upper branch 202 and the third connecting channel 211, and the second thermal valve 214 is used to adjust the distribution relationship of liquid between the rear upper branch 207 and the fourth connecting channel 212.

[0032] In order for the first thermal valve 213 and the second thermal valve 214 to reflect the actual temperature state of the front functional area 11 and the rear functional area 13, both the first thermal valve 213 and the second thermal valve 214 are provided with temperature sensing parts. The temperature sensing part of the first thermal valve 213 is preferably in thermal contact with the liquid in the front lower branch 203. Specifically, it can be set on the flow channel wall of the front lower branch 203 near the one-way valve 215, or connected to the return section of the front lower branch 203 and the first connecting channel 204 through a heat-conducting connection structure, so that it can sense the temperature of the liquid after flowing through the front functional area 11. The temperature sensing part of the second thermal valve 214 is preferably in thermal contact with the liquid in the rear lower branch 206. Specifically, it can be set on the flow channel wall of the rear lower branch 206 near the other one-way valve 215, or connected to the return section of the rear lower branch 206 and the second connecting channel 208 through a heat-conducting connection structure, so that it can sense the temperature of the liquid after flowing through the rear functional area 13.

[0033] With the above arrangement, the first thermal valve 213 is mainly adjusted to open and close based on the temperature change of the return liquid in the front functional area 11, and the second thermal valve 214 is mainly adjusted to open and close based on the temperature change of the return liquid in the rear functional area 13. Since the liquid in the front lower branch 203 and the rear lower branch 206 has flowed through the front functional area 11 and the rear functional area 13 respectively, this position can more accurately reflect whether the front functional area 11 and the rear functional area 13 have reached the set working temperature.

[0034] The circulation device 3 is disposed in the functional cavity 14 and is connected to the cooling water system 2. The circulation device 3 includes a housing 301, a heat dissipation area 302, an inlet pipe 303, a return pipe 304, a motor 305, a countershaft 306, a moving plate 307, at least one fixed plate 308, a limiting slide bar 309, a first reset member 310, at least one drive assembly 311, a fin 312, a drive magnet 313, a first driven magnet 314, a second driven magnet 315, and a limiting ring 316.

[0035] The housing 301 is located inside the functional cavity 14, providing an installation base and liquid circulation space for the circulation device 3. The motor 305 is located outside the housing 301. The secondary shaft 306 is connected to the motor 305 and extends into the housing 301. The moving disk 307 is located on the secondary shaft 306 and inside the housing 301, and can rotate under the drive of the secondary shaft 306. In order to enhance the ability of liquid to enter the cooling water system 2 from the functional cavity 14 and return to the functional cavity 14 from the cooling water system 2, the moving disk 307 is provided with blades on its outer periphery. The liquid inlet pipe 303 is correspondingly arranged with the low-pressure liquid suction area formed by the rotation of the moving disk 307, and the liquid return pipe 304 is correspondingly arranged with the high-pressure liquid discharge area formed by the rotation of the moving disk 307, so as to improve the stability of liquid entering and leaving the functional cavity 14. The liquid inlet pipe 303 and the liquid return pipe 304 are preferably arranged tangentially along the outer periphery of the moving disk 307 and are spaced apart by a predetermined angle in the circumferential direction.

[0036] At least one fixed plate 308 is slidably disposed on the secondary shaft 306 and located on one side of the moving plate 307. Preferably, the at least one fixed plate 308 may be two fixed plates 308 located on both sides of the moving plate 307, so that the liquid forms working gaps on both sides of the moving plate 307. The limiting slide rod 309 is disposed between the inner wall of the housing 301 and the at least one fixed plate 308 and is arranged axially along the secondary shaft 306. The first reset member 310 is disposed on the limiting slide rod 309 and connected to the at least one fixed plate 308. The first reset member 310 is preferably a compression spring, wave spring or butterfly spring assembly sleeved on the outer periphery of the limiting slide rod 309, used to reset the at least one fixed plate 308 away from the moving plate 307 after the driving force is released.

[0037] In order to limit the minimum distance between the fixed plate 308 and the moving plate 307, at least one fixed plate 308 is provided with a limiting ring 316 on the side facing the moving plate 307. The limiting ring 316 is used to limit the maximum travel of at least one fixed plate 308 in the direction of the moving plate 307, so as to ensure that a preset non-contact working gap is always maintained between at least one fixed plate 308 and the moving plate 307.

[0038] To enhance the shearing effect of the liquid in the working gap, at least one fixed plate 308 is provided with a flow guiding structure or a flow turbulence structure on the plate surface opposite to the moving plate 307 to enhance the shearing effect of the liquid. The flow guiding structure or flow turbulence structure can be at least one of annular shallow groove, concentric flow guiding groove, micro-protrusion rib, shear rib or roughened working surface. By forming the above structure on the plate surface opposite to the moving plate 307 and the fixed plate 308, the shearing effect and heat generation efficiency of the liquid can be improved without rigid contact.

[0039] At least one drive component 311 is disposed within the housing 301 and corresponds to and cooperates with at least one fixed plate 308. The drive component 311 includes a first drive plate 3111, a second drive plate 3112, a connecting ring 3113, a swing arm 3114, a second reset member 3115, and a rolling contact member 3116.

[0040] The first drive disk 3111 is connected to at least one fixed disk 308, the second drive disk 3112 is connected to the housing 301 and is disposed opposite to the first drive disk 3111, the connecting ring 3113 is disposed on the secondary shaft 306, one end of the swing arm 3114 is hinged to the connecting ring 3113, and the second reset member 3115 is connected between the swing arm 3114 and the connecting ring 3113. The second reset member 3115 is preferably a tension spring, a torsion spring or a spring sheet, used to reset the swing arm 3114 toward the connecting ring 3113 when the speed of the secondary shaft 306 decreases.

[0041] In order to convert the radial swing of the swing arm 3114 into the axial displacement of the first drive disk 3111, the relative force-bearing positions of the first drive disk 3111 and the second drive disk 3112 are provided with guide slopes. One end of the swing arm 3114 facing the first drive disk 3111 and the second drive disk 3112 is provided with a wedge structure adapted to the guide slope. When the rotational speed of the sub-shaft 306 increases, the swing arm 3114 swings outward around the hinge point with the connecting ring 3113 under the action of centrifugal force, and the wedge structure enters between the first drive disk 3111 and the second drive disk 3112. Through the cooperation of the wedge structure and the guide slope, the radial swing of the swing arm 3114 is converted into the axial displacement of the first drive disk 3111 towards the moving disk 307, thereby pushing at least one fixed disk 308 closer to the moving disk 307.

[0042] In order to reduce the frictional resistance and wear when the swing arm 3114 contacts the first drive disk 3111 and the second drive disk 3112, the end face of the swing arm 3114 that contacts the first drive disk 3111 and the second drive disk 3112 is provided with a rolling contact element 3116, which is at least one of a ball, a roller or a needle roller.

[0043] The outer side of the housing 301 is provided with a heat dissipation area 302, and the heat dissipation area 302 is provided with a swingable fin 312. At least one fixed plate 308 is provided with a driving magnet 313 on its outer periphery. The inner side of the swingable fin 312 is provided with a first driven magnet 314 and a second driven magnet 315. The magnetic pole of the first driven magnet 314 pointing to the inner end face of the housing 301 is opposite to the magnetic pole of the second driven magnet 315 pointing to the inner end face of the housing 301. By changing the relative position between the driving magnet 313 and the first driven magnet 314 and the second driven magnet 315, the opening and closing switching of the swingable fin 312 can be realized.

[0044] In the high-temperature heat dissipation mode, the front functional area 11 and the rear functional area 13 are not the main heat dissipation targets. The liquid is mainly used to dissipate heat from the motor area 12. At this time, the first thermal valve 213 and the second thermal valve 214 control the liquid not to enter the main branch path of the front functional area 11 and the rear functional area 13 formed by the front upper branch 202, the front lower branch 203, the first connecting path 204, the rear upper branch 207, the rear lower branch 206, and the second connecting path 208. Instead, the liquid is allowed to enter the lower cooling channel 205 directly through the upper cooling channel 201, the third connecting path 211, and the fourth connecting path 212, and then return to the functional cavity 14 through the return channel 210 and the return pipe 304.

[0045] At this time, the main flow path of the liquid is: functional chamber 14 → liquid inlet pipe 303 → liquid inlet channel 209 → upper cooling channel 201 → third connecting channel 211 and / or fourth connecting channel 212 → lower cooling channel 205 → liquid return channel 210 → liquid return pipe 304 → functional chamber 14.

[0046] In this flow path, the upper cooling channel 201 and the lower cooling channel 205 together cover the motor area 12. The liquid flows preferentially through the motor area 12, thereby providing the main heat dissipation for the motor area 12. Since the branches of the front functional area 11 and the rear functional area 13 do not bear the main flow under this operating condition, the front functional area 11 and the rear functional area 13 do not receive the main heat dissipation.

[0047] Under this operating condition, the motor 305 rotates at a low speed, and the secondary shaft 306 drives the moving disk 307 to rotate at a low speed. The swing arm 3114 is kept close to the connecting ring 3113 under the action of the second reset member 3115 and does not enter between the first drive disk 3111 and the second drive disk 3112. At least one fixed disk 308 is moved away from the moving disk 307 under the action of the first reset member 310. At least one fixed disk 308 and the moving disk 307 maintain a large non-contact working gap. At this time, the moving disk 307 only undertakes the function of promoting liquid flow and maintaining liquid circulation, without generating significant shear heat.

[0048] At the same time, at least one driving magnet 313 disposed on the outer periphery of the fixed plate 308 corresponds to the second driven magnet 315 disposed on the inner side of the swingable fin 312, causing the swingable fin 312 to swing in the opening direction, thereby increasing the external heat dissipation area of ​​the heat dissipation zone 302 and improving the heat dissipation effect.

[0049] In the low-temperature heating mode, the front functional area 11 and the rear functional area 13 need to be heated first. At this time, the speed of the motor 305 increases, and the secondary shaft 306 accelerates its rotation accordingly. The swing arm 3114 swings outward around the hinge point with the connecting ring 3113 under the action of centrifugal force. The second reset member 3115 is stretched. The swing arm 3114 enters between the first drive disk 3111 and the second drive disk 3112. Through the cooperation of the wedge structure and the guide slope, the first drive disk 3111 moves towards the moving disk 307, thereby pushing at least one fixed disk 308 to move towards the moving disk 307. The first reset member 310 is stretched.

[0050] As at least one fixed plate 308 moves toward the moving plate 307, the non-contact working gap between the at least one fixed plate 308 and the moving plate 307 decreases, and a strong relative shear flow is formed between the moving plate 307 and the at least one fixed plate 308. The liquid undergoes cutting and heat generation in the gap, thereby increasing the temperature of the liquid in the functional cavity 14.

[0051] Under this condition, at least one driving magnet 313 disposed on the outer periphery of the fixed plate 308 corresponds to the first driven magnet 314 disposed on the inner side of the swingable fin 312, causing the swingable fin 312 to swing in the closing direction, thereby reducing the heat dissipation area of ​​the heat dissipation zone 302 to the outside, so as to ensure that the liquid temperature is not easily lost.

[0052] Simultaneously, the first thermal valve 213 and the second thermal valve 214 control the liquid connection to the front upper branch 202, the front lower branch 203, the first connecting path 204, the rear upper branch 207, the rear lower branch 206, and the second connecting path 208, and close the third connecting path 211 and the fourth connecting path 212, so that the liquid heated by the circulation device 3 in the functional chamber 14 flows preferentially into the front functional area 11 and the rear functional area 13 to raise and equalize the temperature of the front functional area 11 and the rear functional area 13.

[0053] Under this operating condition, the main flow path of the liquid is: functional chamber 14 → liquid inlet pipe 303 → liquid inlet channel 209 → upper cooling channel 201 → front upper branch 202 and / or rear upper branch 207 → first connecting channel 204 and / or second connecting channel 208 → front lower branch 203 and / or rear lower branch 206 → lower cooling channel 205 → return channel 210 → return pipe 304 → functional chamber 14.

[0054] When the temperature of the liquid flowing through the front functional zone 11 and the rear functional zone 13 reaches the set operating temperature, the temperature sensing parts of the first thermal valve 213 and the second thermal valve 214 sense the corresponding temperature change and control the third connecting path 211 and the fourth connecting path 212 to open, and gradually close the main branch path formed by the front upper branch 202, the front lower branch 203, the first connecting path 204, the rear upper branch 207, the rear lower branch 206, and the second connecting path 208, so that the liquid recirculates through the upper cooling channel 201, the third connecting path 211, and the fourth connecting path 212 into the lower cooling channel 205.

[0055] At the same time, the speed of motor 305 decreases, and the swing arm 3114 disengages from the first drive disk 3111 and the second drive disk 3112 under the action of the second reset member 3115. At least one fixed disk 308 moves away from the moving disk 307 under the action of the first reset member 310. A large non-contact working gap is restored between the moving disk 307 and at least one fixed disk 308. At this time, the moving disk 307 resumes to only drive the flow of liquid and no longer undertakes the main shearing and heating function. The swingable fins 312 also switch back to the open state to enhance the heat dissipation effect of the heat dissipation area 302.

[0056] In this embodiment, the liquid in the functional cavity 14 is preferably a heat-conducting liquid. In the high-temperature heat dissipation mode, the heat-conducting liquid mainly undertakes the functions of heat transfer and circulating cooling. In the low-temperature heating mode, it mainly undertakes the functions of heat generation, heat carrying and temperature equalization. After the liquid is driven by the moving plate 307 to form a circulating flow in the functional cavity 14, it can not only be transported to the cooling water channel system 2, but also be subjected to shearing action and heated in the working gap between the moving plate 307 and at least one fixed plate 308. The heated liquid then enters the upper cooling channel 201 through the liquid inlet pipe 303 and the liquid inlet channel 209, and flows between the front functional area 11, the rear functional area 13 or the motor area 12 according to the path controlled by the first thermal valve 213 and the second thermal valve 214 to achieve heat dissipation or heating of different areas.

[0057] It should be noted that this embodiment may also include auxiliary components such as a liquid replenishment port, a liquid drain port, a vent, a control circuit board, an electrical connection structure, a wiring sealing structure, a filter structure, a buffer compensation structure, an isolation sealing structure, and an assembly and maintenance structure, to realize functions such as liquid replenishment, liquid discharge, gas discharge, electrical control, electrical connection sealing, liquid filtration, volume compensation, cavity isolation, and assembly and maintenance. All of the above structures can be implemented using conventional structures in the art, and since they are not the focus of improvement in this embodiment, they are not shown separately in the accompanying drawings and will not be described further here.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-support thermally compensated reverse planetary roller screw servo cylinder, characterized in that, include: The electric cylinder body (1) has a front functional area (11), a motor area (12), a rear functional area (13), a functional cavity (14) and an electric control cavity (15) arranged sequentially along the axial direction. Cooling water channel system (2), the cooling water channel system (2) is set in the electric cylinder body (1) and distributed in the front functional area (11), motor area (12) and rear functional area (13). A circulation device (3) is disposed in a functional cavity (14) and the functional cavity (14) is connected to a cooling water system (2); The circulation device (3) includes: The housing (301) is disposed within the functional cavity (14); The motor (305) is disposed outside the housing (301); A secondary shaft (306) is connected to the motor (305) and extends into the housing (301); The moving disk (307) is disposed on the secondary shaft (306) and located inside the housing (301); At least one fixed plate (308) is slidably disposed on the secondary shaft (306) and located on one side of the moving plate (307); A limiting slide bar (309) is disposed between the inner wall of the housing (301) and at least one fixed plate (308), and is arranged axially along the secondary shaft (306); The first reset component (310) is disposed on the limiting slide bar (309) and connected to at least one fixed plate (308); At least one drive component (311) is disposed within the housing (301) and corresponds to and cooperates with at least one fixed plate (308).

2. The dual-support thermally compensated reverse planetary roller screw servo cylinder according to claim 1, characterized in that, The drive component (311) includes: The first drive disk (3111) is connected to at least one of the fixed disks (308); The second drive disk (3112) is connected to the housing (301) and is disposed opposite to the first drive disk (3111); A connecting ring (3113) is disposed on the secondary shaft (306); The swing arm (3114) is hinged at one end to the connecting ring (3113); The second reset component (3115) is connected between the swing arm (3114) and the connecting ring (3113).

3. A dual-support thermally compensated reverse planetary roller screw servo cylinder according to claim 2, characterized in that, At least one of the fixed plates (308) is provided with a limiting ring (316) on the side facing the moving plate (307).

4. A dual-support thermally compensated reverse planetary roller screw servo cylinder according to claim 3, characterized in that, The outer wall of the housing (301) is provided with an inlet pipe (303) and a return pipe (304). The outer periphery of the moving disk (307) is provided with blades. The inlet pipe (303) is arranged in correspondence with the low-pressure liquid absorption area formed by the rotation of the moving disk (307). The return pipe (304) is arranged in correspondence with the high-pressure liquid discharge area formed by the rotation of the moving disk (307). The inlet pipe (303) and the return pipe (304) are arranged tangentially along the outer periphery of the moving disk (307) and are spaced apart by a predetermined angle along the circumference.

5. A dual-support thermally compensated reverse planetary roller screw servo cylinder according to claim 4, characterized in that, At least one of the fixed disks (308) and the moving disks (307) has a flow guiding structure or a flow turbulence structure on the disk surface opposite to the moving disk (307) for enhancing the liquid shearing effect. The flow guiding structure or flow turbulence structure is at least one of annular shallow groove, concentric flow guiding groove, micro-protrusion rib, shearing rib or roughened working surface.

6. A dual-support thermally compensated reverse planetary roller screw servo cylinder according to claim 5, characterized in that, The first drive disk (3111) and the second drive disk (3112) are provided with an inlet ramp at their relative force-bearing positions, and the swing arm (3114) is provided with a wedge-shaped structure that matches the inlet ramp at one end facing the first drive disk (3111) and the second drive disk (3112).

7. A dual-support thermally compensated reverse planetary roller screw servo cylinder according to claim 6, characterized in that, The end face of the swing arm (3114) that contacts the first drive disk (3111) and the second drive disk (3112) is provided with a rolling contact element (3116), which is at least one of a ball, a roller or a needle roller.

8. A dual-support thermally compensated reverse planetary roller screw servo cylinder according to claim 7, characterized in that, The first reset component (310) is a compression spring, wave spring or butterfly spring assembly sleeved on the outer periphery of the limiting slide bar (309), and the second reset component (3115) is a tension spring, torsion spring or spring sheet. The second reset component (3115) is connected between the swing arm (3114) and the connecting ring (3113).

9. A dual-support thermally compensated reverse planetary roller screw servo cylinder according to claim 8, characterized in that, The outer side of the housing (301) is provided with a heat dissipation area (302), the heat dissipation area (302) is provided with a swingable fin (312), at least one of the fixed plates (308) is provided with a driving magnet (313) on its outer periphery, the inner side of the swingable fin (312) is provided with a first driven magnet (314) and a second driven magnet (315), the magnetic pole of the first driven magnet (314) pointing to the inner end face of the housing (301) is opposite to the magnetic pole of the second driven magnet (315) pointing to the inner end face of the housing (301).

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