Speed reducer of intelligent actuator of valve

Abstract

The invention relates to the technical field of valve actuators, in particular to a speed reducer of an intelligent valve actuator, which comprises an actuator body, a speed reducer body and a lubricating medium circulating mechanism, the speed reducer body is integrated in the actuator body, and the speed reducer body is fixedly connected between the actuator upper shell and the actuator lower shell; a speed reduction cavity is formed in the speed reducer upper shell and the speed reducer lower shell, and a speed reduction gear set is arranged in the speed reduction cavity. An output shaft of the driving piece is in transmission connection with the reduction gear set which is in transmission connection with a valve element. The lubricating medium circulating mechanism is communicated with the speed reducing cavity; the speed reducer upper shell or the speed reducer lower shell is fixedly connected with a temperature sensor; and the lubricating medium circulating mechanism is used for circulating and / or supplementing the lubricating medium in the speed reduction cavity. According to the actual running state of the speed reducer, circulating flowing of the lubricating medium is autonomously promoted, the lubricating medium mass is adjusted, and flowing of the lubricating medium and the lubricating medium mass are dynamically matched with the working condition of the speed reducer.

Description

Technical Field

[0001] This invention relates to the field of valve actuator technology, and more specifically to a deceleration device for an intelligent valve actuator. Background Technology

[0002] As a core execution unit in industrial automation control, the valve electric actuator converts motor power into precise torque output through a reducer, realizing the valve opening, closing, and regulation functions. Its operational stability directly determines the safety and process accuracy of the fluid control system. As the core component of power transmission, the reducer relies on lubricating media (mainly grease) for friction reduction, wear resistance, heat dissipation, and sealing protection for the meshing motion of the internal transmission pairs and the rotation of the bearings. The quantity and effectiveness matching of the lubricating media is a key factor in ensuring the life of the reducer and the reliability of the actuator.

[0003] Currently, the lubrication method for valve actuator reducers generally adopts a passive mode of fixed-volume filling and periodic maintenance replenishment. This means that a fixed amount of grease is filled at the factory according to theoretical operating conditions, and manual replenishment or grease replacement is performed at preset intervals during use. To adapt to different operating conditions, the industry has established technical specifications for selecting grease based on conditions such as temperature and load. For example, polyurea-based grease is used for high-temperature conditions, while low-temperature special grease is used for cold regions, to improve the environmental adaptability of the lubricating medium itself. Meanwhile, some large industrial equipment reducers have adopted adaptive lubrication systems based on a temperature-flow dual closed-loop system, which uses a variable frequency oil pump to adjust the lubricating oil flow to match changes in load power.

[0004] However, for the specific application scenarios of valve actuator reducers, existing technologies still have insurmountable shortcomings. The core problem lies in the lack of autonomous adjustment capability of the lubricating medium quantity, making it impossible to dynamically adapt to the actual operating needs of the reducer. This lack of autonomous adjustment capability makes it difficult to dynamically adapt to changes in lubrication requirements caused by fluctuations in operating conditions, leading to shortened reducer lifespan, increased actuator failure rate, and seriously affecting the stability and safety of industrial fluid control systems. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a speed reduction device for a smart valve actuator, which autonomously adjusts the amount of lubricating medium according to the actual operating state of the actuator's speed reducer, so that the amount of lubricating medium dynamically adapts to the operating conditions of the actuator's speed reducer.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a deceleration device for a valve intelligent actuator, comprising an actuator body and a reducer body, wherein the reducer body is integrated into the actuator body, and a lubricating medium circulation mechanism is integrated within the actuator body;

[0007] The actuator body includes an upper actuator housing and a lower actuator housing, which are fixedly connected. The upper actuator housing is provided with a driving component, and the reducer body is fixedly connected between the upper actuator housing and the lower actuator housing.

[0008] The reducer body includes an upper reducer housing and a lower reducer housing, which are fixedly connected. The upper and lower reducer housings form a reduction chamber, and a reduction gear set is installed inside the reduction chamber. The output shaft of the drive unit is driven by the reduction gear set, and a valve core is driven by the reduction gear set. The lubricating medium circulation mechanism is connected to the reduction chamber. A temperature sensor is fixedly connected to either the upper or lower reducer housing, and the detection end of the temperature sensor extends into the reduction chamber.

[0009] The lubricating medium circulation mechanism is used to circulate and / or replenish the lubricating medium in the deceleration chamber based on the temperature change collected by the temperature sensor after the drive unit is started.

[0010] The technical principles of the above solution are as follows:

[0011] The valve actuator housing is constructed by an upper and lower actuator housing. The reducer body is fixedly connected between the upper and lower actuator housings. The reduction gear set of the reducer body is located in the reduction chamber formed inside the upper and lower actuator housings. The reduction gear set is the core mechanical mechanism for transmitting the torque of the driving component, converting the valve opening, closing, or opening degree signal into the driving component's operating signal. When the driving component is running, the torque is transmitted to the valve spindle through the reduction gear set, causing the valve spindle to rotate, thereby realizing the valve opening, closing, or opening degree control. Besides the influence of external environmental factors, the temperature change in the reduction chamber mainly originates from the operation of the reduction gear set during the driving component's operation. When the lubricating medium filling the reduction chamber has poor flow or a low amount of lubricating medium, the temperature rise in the reduction chamber is usually greater than the temperature rise when the lubricating medium flows normally or the amount of lubricating medium is sufficient. By setting a preset temperature change gradient threshold, when the temperature rise in the reduction chamber reaches the preset temperature change gradient threshold, the lubricating medium in the reduction chamber is circulated and / or replenished to ensure that the lubricating medium is in full contact with the reduction gear set and meets the lubrication requirements of the reduction gear set.

[0012] The above approach has the following beneficial effects:

[0013] Compared to existing methods of quantitative filling and periodic replenishment of lubricating medium, this solution autonomously promotes the circulation of lubricating medium and adjusts the amount of lubricating medium based on the actual operating state of the actuator's reducer (the core being the temperature change within the reduction chamber), so that the flow and amount of lubricating medium dynamically adapt to the operating conditions of the actuator's reducer.

[0014] Furthermore, the actuator upper housing is provided with a mounting groove, the drive component is fixedly connected in the mounting groove, and the actuator upper housing is provided with an actuator connector; a control unit is provided inside the actuator upper housing, the control unit is electrically connected to the actuator connector, the drive component and the temperature sensor, the control unit is used to acquire the temperature signal collected by the temperature sensor and control the operation of the drive component and the lubricating medium circulation mechanism;

[0015] The lower housing of the actuator is rotatably connected to the actuator output shaft. One end of the actuator output shaft is connected to the reduction gear set for transmission, and the other end of the actuator output shaft is fixedly connected to the valve core.

[0016] Beneficial effects: The mounting slot provides a stable installation space for the drive components; the actuator connector provides power and data transmission to the electrical components inside the actuator; and the actuator output shaft transmits the torque output by the actuator to the valve core, accurately adjusting the valve core opening.

[0017] Furthermore, the upper housing of the reducer is rotatably connected to an input shaft, which is coaxially and fixedly connected to the output shaft of the drive component;

[0018] The reduction gear set includes a sun gear fixedly connected to the input shaft on the same axis and a gear sleeve fixedly connected to the side wall of the reduction chamber. Several planet gears mesh between the sun gear and the gear sleeve, and the planet gears are rotatably connected to planet shafts.

[0019] The lower housing of the reducer is rotatably connected to an output flange, and the planetary shafts are rotatably connected to the output flange. The output flange is coaxially fixedly connected to a reduction output shaft, and the reduction output shaft is coaxially sleeved with an output connecting sleeve. The output connecting sleeve is coaxially sleeved with the actuator output shaft.

[0020] Beneficial effects: The torque of the drive component is input into the reduction gear set through the input shaft. Then, through the sun gear, planet gears and gear sleeve structure in the reduction gear set, the torque is reduced and transmitted to the output flange. The reduced torque is then transmitted to the actuator output shaft through the reduction output shaft and output connecting sleeve, and finally acts on the valve core.

[0021] Furthermore, the input shaft extends into the deceleration chamber, and the portion of the input shaft extending into the deceleration chamber is coaxially and fixedly connected to a stirring blade.

[0022] Beneficial effects: During the rotation of the input shaft, the stirring blades synchronously stir the lubricating medium in the deceleration chamber, promoting the flow of the lubricating medium.

[0023] Furthermore, the lubricating medium circulation mechanism includes a medium storage box embedded in the lower housing of the actuator, which is used to temporarily store the lubricating medium; a medium pipeline is provided between the medium storage box and the deceleration chamber, and a medium pump is provided in connection with the medium pipeline, and the medium pump is signal connected to the control unit.

[0024] The control unit is used to control the operation of the medium pump based on the temperature change collected by the temperature sensor after the drive unit is started, so that the lubricating medium circulates between the medium storage box and the deceleration chamber, or replenishes the lubricating medium temporarily stored in the medium storage box into the deceleration chamber.

[0025] Beneficial effects: When there is only one media pipeline, the lubricating medium in the media storage box can be transported to the deceleration chamber through the forward and reverse operation of the media pump, or vice versa, thereby realizing the reciprocating circulation of the lubricating medium. The amount of lubricating medium transported from the media storage box to the deceleration chamber can be increased to replenish the lubricating medium. The media storage box can be locked by installing a storage box lock adapted to the lower housing of the actuator. The lubricating medium temporarily stored within can be replenished or replaced by opening the storage box lock.

[0026] Furthermore, the number of media pipelines is at least two, and the media pipelines are connected to a multi-channel solenoid valve. The multi-channel solenoid valve is connected to the media storage box through the media pipeline, and the media pipelines are respectively fixed to the upper housing and the lower housing of the reducer. The connection positions of the media pipelines to the reduction chamber are located in the area covered by the upper housing and the area covered by the lower housing of the reducer.

[0027] Beneficial effects: By setting up several media pipelines and using multi-pass solenoid valves, the independent circulation of lubricating media in the deceleration chamber can be achieved, that is, the lubricating media does not exchange with the lubricating media in the media storage box during circulation; when the lubricating media needs to be replenished, the multi-pass solenoid valves are controlled to make any pipeline form a passage between the deceleration chamber and the lubricating media chamber for replenishment.

[0028] Furthermore, it also includes a detection unit, which is connected to the rear end of the valve. The detection unit includes a detection tube with pipe joints at both ends. A fixed seat is fixedly connected to the side wall of the detection tube, and the fixed seat extends to the inner side wall of the detection tube. A detection shaft is fixedly connected to the fixed seat, and a first detection sleeve is rotatably connected to the detection shaft. A first sensing plate is fixedly connected to the inner side wall of the first detection sleeve, and a guide plate is fixedly connected to the inner side wall of the first detection sleeve.

[0029] A second sensing plate is fixedly connected to the side wall of the detection shaft covered by the first detection sleeve. The second sensing plate and the first sensing plate are electrically connected by a detection connector. The detection connector is electrically connected to the actuator connector.

[0030] The control unit is used to determine the fluctuation information of the medium in the detection tube based on the overlap fluctuation between the second sensing plate and the first sensing plate, to determine the rotational stability of the valve core shaft based on the medium fluctuation information, and to adjust the circulation and / or replenishment of the lubricating medium in the deceleration chamber based on the rotational stability of the valve core shaft.

[0031] Beneficial Effects: The detection tube is located at the rear end of the valve, meaning the medium enters the detection tube after passing through the valve. On the valve side, the rotation of the valve core shaft drives the valve core to rotate. The stability of the valve core rotation is related to the stability of the reduction gear set's operation; instability in the valve core rotation will cause fluctuations in the medium passing through the valve. On the detection unit side, the guide plate fluctuates with the medium's fluctuations. The amount and frequency of fluctuations are directly proportional to the degree and frequency of instability during valve core rotation. Therefore, the stability of the reduction gear set's operation can be predicted based on the fluctuations of the guide plate (fluctuations in the overlap between the second and first sensing plates). When the reduction gear set's operation is unstable, it mainly stems from mechanical vibration caused by poor lubrication. Therefore, it is necessary to adjust the circulation and / or replenishment of the lubricating medium in the reduction chamber to restore and maintain stable operation of the reduction gear set.

[0032] Furthermore, both the second and first sensing sheets are metal sheets, and the second and first sensing sheets always remain parallel when the first detection sleeve rotates. The control unit obtains the overlap fluctuation between the second and first sensing sheets based on the capacitance fluctuation between them.

[0033] Beneficial effects: By utilizing the conductive / electromagnetic properties of metals, the change in overlapping area / size is converted into a capacitance value. Two energized metal sheets serve as the two plates of a capacitor. The overlapping area directly determines the capacitance value, which is linearly and positively correlated with the overlapping area. After calibration, the overlap and its change can be directly calculated from the measured capacitance value, thereby deriving the overlap fluctuation between the second and first sensing sheets.

[0034] Furthermore, a second detection sleeve is rotatably connected to the detection shaft. Several guide vanes are evenly distributed axially on the side wall of the second detection sleeve. A speed sensor is fixedly connected to the side wall of the detection shaft covered by the second detection sleeve. The speed sensor is electrically connected to the detection connector.

[0035] The control unit is used to determine the flow rate of the medium passing through the detection tube based on the rotation speed signal of the second detection sleeve collected by the rotation speed sensor. When the flow rate of the medium passing through the detection tube is greater than the flow rate threshold, it starts to acquire the overlap fluctuation between the second sensing plate and the first sensing plate.

[0036] Beneficial effects: By obtaining the flow rate of the medium in the detection tube, the flow rate of the medium in the detection tube is small at the initial stage of valve opening (initial stage of valve core rotation). The guide plate will inevitably fluctuate with the medium. However, as the flow rate of the medium in the detection tube increases, the guide plate gradually returns to stability. When the flow rate is above the preset threshold, the fluctuation of the guide plate mainly comes from whether the rotation of the valve core shaft is stable. This avoids misjudging the rotation stability of the valve core shaft at the initial stage of valve opening.

[0037] Furthermore, the control unit is connected to indicator lights, and the control unit controls the indicator lights to operate in different ways based on whether lubricating medium circulation or lubricating medium replenishment is required.

[0038] Beneficial effect: The indicator lights operate in different forms, such as different light colors, different brightness, or different light emission patterns, to indicate the control unit is performing the regulation of the lubrication medium in the reducer. Attached Figure Description

[0039] Figure 1 This is an isometric view of the actuator body according to an embodiment of the present invention;

[0040] Figure 2 This is a top view of the actuator body according to an embodiment of the present invention;

[0041] Figure 3 for Figure 2 GG cross-sectional view;

[0042] Figure 4 for Figure 2 HH sectional view;

[0043] Figure 5 This is a front view of the actuator body according to an embodiment of the present invention;

[0044] Figure 6 for Figure 5 KK sectional view;

[0045] Figure 7 for Figure 5 LL section view;

[0046] Figure 8 This is an isometric view of the detection unit according to an embodiment of the present invention;

[0047] Figure 9 This is a top view of the detection unit according to an embodiment of the present invention;

[0048] Figure 10 for Figure 9 Sectional view II;

[0049] Figure 11 This is a schematic diagram showing the installation positions of the actuator body and the detection unit in an embodiment of the present invention.

[0050] The reference numerals in the accompanying drawings include:

[0051] 10. Actuator body; 11. Upper actuator housing; 12. Lower actuator housing; 13. Actuator connector; 14. Drive unit; 15. Media storage box; 16. Storage box lock; 17. Actuator output shaft; 18. Indicator light;

[0052] 20. Reducer body; 21. Reducer upper housing; 22. Reducer lower housing; 23. Input shaft; 24. Agitator blade; 25. Sun gear; 26. Planet gears; 27. Output flange; 28. Reducer output shaft; 29. ​​Output connecting sleeve; 30. Gear sleeve;

[0053] 41. Temperature sensor; 42. Media pipeline; 43. Multi-way solenoid valve;

[0054] 50. Detection unit; 51. Pipe joint; 52. Detection tube; 53. Fixing base; 54. Detection connector; 55. First detection sleeve; 56. Guide plate; 57. Second detection sleeve; 58. Guide vane. Detailed Implementation

[0055] The technical solution of the present invention 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 the present invention. 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.

[0056] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0058] The following detailed description illustrates the specific implementation method:

[0059] like Figures 1-7The following describes a reduction gear for a valve intelligent actuator: The actuator body 10 includes an actuator body 10 and a reducer body 20. The reducer body 20 is integrated within the actuator body 10, which also integrates a lubricating medium circulation mechanism. The actuator body 10 includes an upper actuator housing 11 and a lower actuator housing 12, which are fixedly connected. The upper actuator housing 11 is provided with a driving component 14. The reducer body 20 is fixedly connected between the upper actuator housing 11 and the lower actuator housing 12. The reducer body 20 includes an upper reducer housing 21 and a lower reducer housing 22. The upper housing 21 and the lower housing 22 of the reducer are fixedly connected. The interior of the upper housing 21 and the lower housing 22 of the reducer form a reduction chamber, and a reduction gear set is provided in the reduction chamber. The output shaft of the drive component 14 is drivenly connected to the reduction gear set, and the reduction gear set is drivenly connected to the valve core. The lubricating medium circulation mechanism is connected to the reduction chamber. A temperature sensor 41 is fixedly connected to the upper housing 21 or the lower housing 22 of the reducer, and the detection end of the temperature sensor 41 extends into the reduction chamber. The lubricating medium circulation mechanism is used to circulate and / or replenish the lubricating medium in the reduction chamber based on the temperature change collected by the temperature sensor 41 after the drive component 14 is started.

[0060] Specifically, the actuator body 10 is an integral or split shell structure made of metal casting or machining, used to accommodate and support the drive component 14, the reducer body 20, and the lubricating medium circulation mechanism; the upper shell 11 and the lower shell 12 of the actuator are made of aluminum alloy, stainless steel, or engineering plastic, and are fixedly connected by bolts, clips, or welding. A sealing ring is provided at the connection to ensure the airtightness of the reduction chamber; the drive component 14 set in the upper shell 11 of the actuator is a DC motor, stepper motor, or servo motor, and its output shaft is directly or via a coupling connected to the input end of the reduction gear set; the installation position of the drive component 14 is set according to the actual situation, embedded in the preset installation groove of the upper shell 11 of the actuator, or fixed to the outer wall of the shell by a flange.

[0061] Specifically, the reducer body 20 is a planetary gear reduction structure, integrated into the actuator body 10, to achieve a compact arrangement; the upper housing 21 and the lower housing 22 of the reducer are made of die-cast aluminum or stainless steel, and the two are fastened by screws and cooperate with sealing gaskets to form a closed reduction chamber; the reduction gear set set in the reduction chamber is a single-stage or multi-stage planetary gear set, and the transmission connection between the reduction gear set and the valve core is a key connection, spline connection or interference fit. The valve core is a ball valve core, butterfly valve plate or gate valve stem, and its rotation axis is coaxial with the reduction output shaft 28.

[0062] Specifically, the lubricating medium circulation mechanism is a fluid control subsystem comprising a medium storage box 15, a medium pipeline 42, and a medium pump. The medium storage box 15 is embedded inside the lower housing 12 of the actuator or in a reserved cavity on the side wall, and its volume can be set according to the volume of the lubricating medium in the deceleration chamber. In some embodiments, a storage box lock 16 adapted to the medium storage box 15 is provided outside the lower housing 12 of the actuator to lock the medium storage box 15. The lubricating medium temporarily stored therein can be replenished or replaced by opening the storage box lock 16. The medium pipeline 42 is a metal capillary tube, a flexible silicone tube, or a PTFE-coated stainless steel hose. Its inner diameter is 0.5 mm to 3.0 mm, and both ends of the pipeline are connected to different areas of the medium storage box 15 and the deceleration chamber, respectively. The medium pump is a micro diaphragm pump, a gear pump, or a peristaltic pump. The lubricating medium can be lithium-based grease, polyurea-based grease, or perfluoropolyether oil.

[0063] Specifically, the temperature sensor 41 is an NTC thermistor or a PT100 platinum resistance thermometer, and its detection end is tightly attached to the inner wall surface of the upper housing 21 or the lower housing 22 of the reducer facing the reduction chamber by thermal grease or metal pressure plate.

[0064] The lubricating medium circulation mechanism is used to circulate and / or replenish the lubricating medium in the deceleration chamber based on the temperature change collected by the temperature sensor 41 after the drive component 14 is started. The temperature change is the rate of temperature rise or the slope of the temperature change trend curve. The control logic of this embodiment is set as follows: when the temperature rises above the first temperature threshold within a first preset time after the drive component 14 is started, or when the temperature rises above the second temperature threshold within a second preset time, the medium pump is triggered to run, so that the lubricating medium enters the deceleration chamber from the medium storage box 15 through the medium pipeline 42 to achieve replenishment; when the temperature in the deceleration chamber is continuously higher than the third temperature threshold for more than a third preset time, the medium pump is triggered to run in reverse or switch the pipeline path, so that part of the lubricating medium flows back to the medium storage box 15 to achieve circulation and renewal; the start and stop conditions, duration and flow rate of circulation and replenishment are preset or adjusted online by the control unit according to the actual application conditions.

[0065] This scheme constructs a closed-loop lubrication control architecture with real-time temperature change of the deceleration chamber as the sensing input and dynamic circulation and replenishment of the lubricating medium as the execution output, upgrading the traditional static filling lubrication to an adaptive lubrication mechanism that is strongly coupled with the operating state of the drive component 14.

[0066] The working process and principle of this scheme are as follows: after the drive component 14 is started, it drives the reduction gear set to run. The meshing of the gears and the rotation of the bearing generate frictional heat. The heat is conducted to the wall of the reduction cavity and is collected in real time by the temperature sensor 41. The control unit continuously analyzes the change characteristics of the temperature signal and identifies abnormal temperature rise caused by poor lubrication. Once it is determined that the current lubrication state is insufficient to maintain thermal balance, the drive medium pump is activated to deliver the lubricating medium to the key friction pair area of ​​the reduction cavity through the medium pipeline 42, thereby improving the coverage and fluidity of the grease, thereby suppressing temperature rise, reducing wear, and extending the life of the reducer.

[0067] In some embodiments, in an automatic regulating valve scenario for an industrial steam pipeline, after the valve intelligent actuator receives a 4–20mA control signal from the DCS system (Distributed Control System; an automation system for existing industrial process control), the drive component 14 starts and outputs torque, driving the planetary gear set to rotate, thereby driving the valve core to complete the opening adjustment; in the initial stage, the temperature of the deceleration chamber rises slowly, and the control unit obtains the temperature rise rate sampled by the temperature sensor 41 as 0.3℃ / s; when the actuator continues to run for 5 seconds, due to the sudden increase in load, the gear meshing resistance increases, and the measured temperature rise rate jumps to 0.8℃ / s. The control unit judges that the fluidity of the lubricating medium has decreased, and immediately starts the medium pump, injecting the pre-stored polyurea-based lubricating grease in the medium storage box 15 into the meshing area of ​​the sun gear 25 and planetary gear 26 at the top of the deceleration chamber through the medium pipeline 42 on the upper shell side at a flow rate of 2.5mL / min.

[0068] The above technical solution achieves the following beneficial effects: a lubricating medium circulation mechanism is integrated into the actuator body 10, and the detection end of the temperature sensor 41 is extended into the deceleration chamber, enabling real-time sensing of thermal state changes in the core working area of ​​the reducer; the lubricating medium circulation mechanism is connected to the deceleration chamber and performs circulation and / or replenishment actions based on temperature changes, which can dynamically compensate for local deficiencies of lubricating grease caused by shear thinning, volatilization, or migration; the reducer body 20 is integrated into the actuator body 10, forming a compact and reliably sealed deceleration chamber, avoiding the risk of external contamination intrusion and lubricating medium leakage.

[0069] In some embodiments, the actuator housing 11 is provided with a mounting groove, which is a recessed structure opened on the outer side of the actuator housing 11. The shape of the mounting groove is rectangular, circular or U-shaped (as long as it matches the outline of the drive component 14). The size is set according to the outline of the drive component 14 and the installation tolerance requirements, such as adapting to the standardized mounting interface size of common servo motors or stepper motors. The depth and sidewall strength of the mounting groove meet the vibration suppression and heat conduction requirements of the drive component 14 during operation. The specific parameters are set according to the actual situation, and this application embodiment does not make special limitations in this regard. The drive component 14 is fixedly connected in the mounting groove, and its output shaft extension direction is coaxially aligned with the input shaft 23 of the reducer body 20 to achieve direct transmission connection. The drive component 14 is rigidly fixed to the mounting groove by bolt fastening, snap-fit ​​or interference fit, etc. The fixing method is selected according to the actual assembly process, such as threaded connection or elastic clamping. This application embodiment does not make special limitations in this regard.

[0070] The actuator housing 11 is provided with an actuator connector 13, which is a multi-pin plug, a waterproof industrial connector, or an onboard lead-out terminal, used to connect to an external power supply, control signal, and communication bus. The pin definitions of the actuator connector 13 may include positive power supply, negative power supply, CAN_H, CAN_L, 4–20mA analog input, DI / DO signal terminals, etc., which are not specifically limited in this embodiment. The actuator connector 13 is connected to the control unit through printed circuit board traces or a flexible flat cable. The connection path avoids areas with high electromagnetic interference and is equipped with filtering and ESD protection circuits.

[0071] The control unit is located inside the actuator housing 11. This control unit is an embedded microcontroller (MCU), programmable logic controller (PLC) module, or application-specific integrated circuit (ASIC). The control unit integrates an analog-to-digital converter (ADC) module for acquiring the analog voltage signal output by the temperature sensor 41; it also integrates a pulse width modulation (PWM) output module for controlling the drive unit 14; and it integrates a digital output interface (DO) for controlling the medium pump and multi-channel solenoid valve 43 in the lubrication medium circulation mechanism. The power supply for the control unit is introduced through the actuator connector 13. The PCB layout of the control unit is located in the area above the inner wall of the actuator housing 11, away from the heat source of the deceleration chamber, and is provided with a thermal pad in contact with the housing to assist in heat dissipation. The electrical connection between the control unit and the actuator connector 13, the drive unit 14, and the temperature sensor 41 is a direct hard wire connection or a terminal block connection. The wiring path is shielded and bundled to reduce signal crosstalk.

[0072] The lower housing 12 of the actuator is rotatably connected to the actuator output shaft 17. The actuator output shaft 17 is a solid steel shaft, a hollow stainless steel shaft, or a surface-nitrided alloy shaft, and its length is set according to the overall axial dimension of the actuator. The actuator output shaft 17 is supported in the bearing seat of the lower housing 12 of the actuator by rolling bearings or sliding bearings. The bearing type is a deep groove ball bearing, an angular contact ball bearing, or a self-lubricating copper sleeve. The installation method is an interference fit or an axial snap ring limit. One end of the actuator output shaft 17 is connected to the reduction gear set for transmission. This transmission connection method can be a key connection, a spline connection, a pin connection, or an end face gear meshing. The connection part is provided with an anti-loosening structure. The other end of the actuator output shaft 17 is fixedly connected to the valve core. This fixed connection method is a threaded connection, a flange connection, or a quick-release clamp connection. The connection end face is provided with a locating pin or a stop structure to ensure coaxiality. The rotational accuracy and runout of the actuator output shaft 17 meet the accuracy requirements of the valve regulating stage. Its material hardness and surface roughness are adapted according to the valve core load characteristics. This embodiment of the application does not make any special limitations on this.

[0073] Specifically, the control unit collects the analog voltage signal output from the temperature sensor 41 in real time and converts it into a digital temperature value via an ADC. When the drive unit 14 starts, the control unit continuously monitors the temperature change rate within the deceleration chamber. If the temperature rise exceeds a preset gradient threshold within a unit of time, it determines that the lubrication condition is deteriorating and generates a control command: starts the media pump via the DO interface and opens the corresponding multi-channel solenoid valve 43 according to a preset strategy, allowing the lubricating medium to circulate within the media storage box 15 and enter the deceleration chamber from the media storage box 15 via the media pipeline 42 (replenishing the lubricating medium); simultaneously, the control... The control unit receives the opening command signal input from the actuator connector 13, and combines it with the current valve core position feedback (which can be obtained through the encoder or Hall sensor at the end of the actuator output shaft 17, although not written in this application, it is a conventional configuration in the field, and is only described here as an implementation supplement), and adjusts the output torque and speed of the drive unit 14 in a closed loop to ensure that the actuator output shaft 17 smoothly drives the valve core to complete the opening and closing action; throughout the process, the actuator output shaft 17, as the power output terminal, stably transmits the low-speed, high-torque output by the reducer body 20 to the valve core, and its rotational stability directly affects the valve adjustment accuracy and response consistency.

[0074] Through the above technical solutions, since the upper housing 11 of the actuator is provided with a mounting groove and fixedly connected to the drive component 14, the installation rigidity and axial positioning accuracy of the drive component 14 are ensured, and the operating vibration is reduced. Since the upper housing 11 of the actuator is provided with an actuator connector 13 and integrates a control unit, and the control unit is electrically connected to the actuator connector 13, the drive component 14 and the temperature sensor 41, a local intelligent node integrating signal acquisition, logic judgment and execution control is constructed, eliminating the dependence on external controllers. Since the control unit controls the operation of the drive component 14 and the lubrication medium circulation mechanism based on the temperature changes collected by the temperature sensor 41, dynamic matching between the lubrication strategy and the actual working conditions is achieved, improving the lubrication effectiveness. Since the lower housing 12 of the actuator is rotatably connected to the actuator output shaft 17, and its two ends are respectively connected to the reduction gear set and the valve core transmission, a complete, compact and low-loss power transmission chain is formed, improving the overall transmission efficiency and structural reliability of the machine.

[0075] In some embodiments, the upper housing 21 of the reducer is rotatably connected to an input shaft 23, and the input shaft 23 is coaxially and fixedly connected to the output shaft of the drive member 14; the reduction gear set includes a sun gear 25 coaxially and fixedly connected to the input shaft 23 and a gear sleeve 30 fixedly connected to the side wall of the reduction chamber, a plurality of planet gears 26 meshing between the sun gear 25 and the gear sleeve 30, and the planet gears 26 are rotatably connected to planet shafts; the lower housing 22 of the reducer is rotatably connected to an output flange 27, and the planet shafts are all rotatably connected to the output flange 27; the output flange 27 is coaxially and fixedly connected to a reduction output shaft 28; the reduction output shaft 28 is coaxially sleeved with an output connecting sleeve 29, and the output connecting sleeve 29 is coaxially sleeved with the actuator output shaft 17.

[0076] Specifically, the upper housing 21 of the reducer is a metal casting housing, and its inner wall is provided with a bearing mounting seat. The input shaft 23 is rotatably connected to the bearing mounting seat through a rolling bearing. The part of the input shaft 23 extending into the reduction chamber is coaxially fixedly connected to the output shaft of the drive component 14 by a key connection or interference fit to ensure the coaxiality of power transmission and torque carrying capacity. The material of the input shaft 23 can be alloy steel, and the surface is carburized and quenched. Its diameter and length can be set according to the actual transmission power and space constraints. This application embodiment does not make any special limitations on this.

[0077] The sun gear 25 is an involute spur gear, which is coaxially fixedly connected to the input shaft 23 by spline connection or locking with set screw. Its module, number of teeth and pressure angle can be set according to the reduction ratio requirements. The specific parameters can be adjusted according to the internal space of the reduction chamber and the load characteristics. This application embodiment does not make any special limitations on this.

[0078] The gear sleeve 30 has a ring structure, with its internal teeth meshing with the external teeth of the planetary gear 26. Its outer wall is fixedly connected to the side wall of the reduction chamber by bolts or embedded slot structure. The fixed position is located near the mating surface of the upper housing 21 and the lower housing 22 of the reducer to improve the overall rigidity. The tooth width, tooth thickness and heat treatment method of the gear sleeve 30 can be matched and designed according to the number of planetary gears 26 and the meshing force distribution. This application embodiment does not make any special limitations on this.

[0079] The planetary gears 26 are multiple symmetrically arranged external meshing gears, and the number can be 3, 4 or 6. Three can be selected to balance structural compactness and load balance. Each planetary gear 26 is rotatably connected to the corresponding planetary shaft through a short shaft structure. The two ends of the planetary shaft are respectively embedded in the corresponding shaft holes of the upper housing 21 and the lower housing 22 of the reducer, and are limited by the shaft elastic retaining ring. The tooth profile and module of the planetary gears 26 are consistent with those of the sun gear 25 and the gear sleeve 30.

[0080] The planetary shaft is a solid cylindrical shaft, and its specific dimensions and arrangement angles can be determined based on the number of planetary gears 26 and the geometric constraints of the reduction chamber. This application does not impose any special limitations on this aspect.

[0081] The output flange 27 is an annular disc structure. The output flange 27 is rotatably connected to the lower housing 22 of the reducer through a rolling bearing. The material of the output flange 27 can be aluminum alloy or cast iron. Its structural strength must meet the static and dynamic bearing requirements of the resultant force transmitted by the planetary shaft. This application embodiment does not make any special limitations on this.

[0082] The reduction output shaft 28 has a stepped shaft structure. One end of it is coaxially fixedly connected to the output flange 27 via a spline or flat key, and the other end is coaxially sleeved with the output connecting sleeve 29. The shaft diameter, step size and surface hardness of the reduction output shaft 28 can be set according to the output torque and fatigue life requirements. This application embodiment does not impose any special limitations on this.

[0083] The output connecting sleeve 29 is a hollow cylindrical structure. Its inner hole forms a clearance fit or transition fit with the outer circle of the reduction output shaft 28, and its outer circle forms a coaxial sleeve relationship with the inner hole of the actuator output shaft 17. The axial length, wall thickness and material of the output connecting sleeve 29 are selected according to the assembly tolerance and torque transmission stability. This application embodiment does not impose any special limitations on these.

[0084] The actuator output shaft 17 is a hollow or solid shaft structure, and its inner hole fits with the outer circle of the output connecting sleeve 29. The end of the actuator output shaft 17 is provided with a keyway or thread structure for fixed connection with the valve core. Its material can be stainless steel or alloy steel, and the surface can be blackened or passivated to enhance corrosion resistance. This application embodiment does not make any special limitation on this.

[0085] Specifically, after the drive unit 14 is started, the power is transmitted to the input shaft 23 through the output shaft of the drive unit 14, which drives the sun gear 25 to rotate. The sun gear 25 drives each planet gear 26 to revolve around the sun gear 25 while rotating on its own axis. The planet gears 26 transmit the combined torque to the output flange 27 through the planet shaft. The output flange 27 drives the reduction output shaft 28 to rotate, and then transmits the power smoothly to the actuator output shaft 17 through the output connecting sleeve 29, which finally drives the valve core to complete the opening and closing action. This planetary gear structure realizes multi-point meshing, uniform load distribution and high rigidity output, effectively suppressing vibration and impact, and improving transmission smoothness and response accuracy.

[0086] Through the above technical solution, since the input shaft 23 and the output shaft of the drive component 14 are coaxially fixedly connected, the additional bending moment caused by the eccentricity of the coupling is avoided, and the coaxial stability of the power transmission at the input end is improved. Since several planetary gears 26 mesh between the sun gear 25 and the gear sleeve 30, and the planetary gears 26 are connected to the output flange 27 through the planetary shaft, multiple teeth mesh simultaneously and the load is distributed, reducing the contact stress of a single tooth and extending the service life of the reduction gear set. Since the output flange 27 is coaxially fixedly connected to the reduction output shaft 28, and the reduction output shaft 28 is coaxially sleeved with the actuator output shaft 17 through the output connecting sleeve 29, the assembly structure at the output end is simplified, and the convenience of on-site maintenance and replacement is improved while ensuring coaxiality.

[0087] In some embodiments, the input shaft 23 extends into the reduction chamber, and the portion of the input shaft 23 extending into the reduction chamber is coaxially and fixedly connected to a stirring blade 24. The stirring blade 24 can be a radially symmetrical two- or three-piece thin plate structure, and its cross-sectional shape can be rectangular, trapezoidal, or arc-shaped. The thickness can be set according to the rotational speed of the input shaft 23 and the viscosity of the lubricating medium. The stirring blade 24 and the input shaft 23 can be coaxially and fixedly connected by interference fit, key connection, or laser welding. The connection strength must meet the requirement that it will not loosen or deform during continuous operation at the rated speed. The rotational diameter of the stirring blade 24 is smaller than the inner diameter of the reduction chamber, and it maintains a non-interference clearance with the reduction gear set, planetary gear 26, and gear sleeve 30.

[0088] The stirring blade 24 rotates synchronously with the drive component 14 under the drive of the input shaft 23. Its function is to apply shear force and disturbance force to the lubricating medium that is stationary or flowing at low speed in the deceleration chamber, so as to promote the formation of a micro-circulation flow field of the lubricating medium along the circumference and axial direction of the deceleration chamber, thereby improving the uniformity of coverage and renewal rate of the lubricating grease in the meshing area of ​​the sun gear 25, planet gear 26 and gear sleeve 30. The geometric parameters, installation angle and number of stirring blades 24 can be adaptively adjusted according to the cavity volume of different models of reducers, the type of lubricating medium (such as lithium-based grease, polyurea-based grease) and the temperature rise curve under typical operating conditions. For example, a larger tilt angle and more blades can be used under high temperature conditions to enhance the disturbance effect. This application embodiment does not make special limitations on this.

[0089] In some other embodiments, the lubricating medium circulation mechanism includes a medium storage box 15 embedded in the lower housing 12 of the actuator, the medium storage box 15 being used to temporarily store the lubricating medium; a medium pipeline 42 is provided between the medium storage box 15 and the deceleration chamber, and a medium pump is provided between the medium pipeline 42 and the medium pump, the medium pump being signal-connected to the control unit; the control unit is used to control the operation of the medium pump based on the temperature change collected by the temperature sensor 41 after the drive unit 14 is started, so that the lubricating medium circulates between the medium storage box 15 and the deceleration chamber, or replenishes the lubricating medium temporarily stored in the medium storage box 15 into the deceleration chamber.

[0090] Specifically, the medium storage box 15 is used to temporarily store the lubricating medium, which is lithium-based grease, polyurea-based grease or fully synthetic grease. The selection can be determined according to the ambient temperature range of the valve intelligent actuator. Polyurea-based grease is selected under high temperature conditions, and low temperature lithium-based grease is selected under low temperature conditions.

[0091] The medium pipeline 42 has at least two connections, each connected to a multi-way solenoid valve 43, which is connected to the medium storage box 15 via the medium pipeline 42. One connection serves as the inlet pipeline, transporting the lubricating medium from the medium storage box 15 to the deceleration chamber, while the other serves as the return pipeline, guiding the lubricating medium from the deceleration chamber back to the medium storage box 15. Both ends of the medium pipeline 42 are connected to the medium storage box 15 and the deceleration chamber respectively via sealed joints. The connection port on the deceleration chamber side is located in the area covered by the upper housing 21 or the lower housing 22 of the reducer, to enable the injection and extraction of lubricating medium at different heights within the deceleration chamber.

[0092] The media pump is installed on the media pipeline 42. Its pumping direction is switched by the positive and negative pulse signals output by the control unit, thereby realizing the bidirectional controllable flow of lubricating medium between the media storage box 15 and the deceleration chamber. When the control unit determines that the temperature rise rate of the deceleration chamber exceeds the preset threshold, the media pump is started to run in the forward direction to pump fresh lubricating medium from the media storage box 15 into the deceleration chamber for replenishment. When it is determined that the fluidity of the lubricating medium in the deceleration chamber decreases but the quantity is sufficient, the media pump is started to run in the reverse direction to draw the lubricating medium deposited at the bottom of the deceleration chamber or in the locally overheated area back to the media storage box 15, mix it, and then pump it back in to achieve circulation and renewal.

[0093] Based on the initial temperature reference value after the drive unit 14 is started, the control unit continuously monitors the real-time temperature data collected by the temperature sensor 41 and calculates the temperature change rate per unit time. When the temperature change rate is detected to be continuously higher than the first threshold, it is determined that there is a risk of insufficient lubrication in the deceleration chamber. The control unit controls the medium pump to run in the forward direction and quantitatively replenishes the lubricating medium temporarily stored in the medium storage box 15 to the deceleration chamber. When the temperature change rate is detected to be between the first threshold and the second threshold and the duration exceeds the preset time, it is determined that the lubricating medium is unevenly distributed or locally aged. The control unit controls the medium pump to run in the reverse direction and drives the lubricating medium in the deceleration chamber to flow back to the medium storage box 15. The lubricating medium is then mixed and homogenized in the medium storage box 15 through the built-in stirring structure or subsequent pumping process. When the temperature change rate falls below the second threshold and remains stable, the operation of the medium pump is stopped.

[0094] Through the above technical solution, at least two medium pipelines 42 are respectively fixed to the upper housing 21 and the lower housing 22 of the reducer, and the dynamic switching of the pipeline state is realized through the multi-channel solenoid valve 43. The circulation, replenishment or zone control mode can be selected according to the temperature change characteristics of the reduction chamber. The connection position between the medium pipeline 42 and the reduction chamber is located in the coverage area of ​​the upper housing and the coverage area of ​​the lower housing, respectively. The lubricating medium covers different height spaces in the reduction chamber, improving the lubrication dead zone. The multi-channel solenoid valve 43 supports the combined control of multiple channels, which can expand the system control dimension without adding an extra pump or pipeline, and improve the lubrication response speed and spatial adaptability.

[0095] like Figures 8-11 As shown, in some embodiments, a detection unit 50 is also included. The detection unit 50 is connected to the rear end of the valve. The detection unit 50 includes a detection tube 52, with pipe joints 51 at both ends of the detection tube 52. A fixing seat 53 is fixedly connected to the side wall of the detection tube 52. The fixing seat 53 extends to the inner side wall of the detection tube 52. A detection shaft is fixedly connected to the fixing seat 53. A first detection sleeve 55 is rotatably connected to the detection shaft. A first sensing plate is fixedly connected to the inner side wall of the first detection sleeve 55. A guide plate 56 is fixedly connected to the inner side wall of the first detection sleeve 55. A second sensing plate is fixedly connected to the side wall of the detection shaft covered by the first detection sleeve 55. The second sensing plate and the first sensing plate are electrically connected to a detection connector 54. The detection connector 54 is electrically connected to the actuator connector 13. The control unit is used to determine the medium fluctuation information in the detection tube 52 based on the overlap fluctuation between the second sensing plate and the first sensing plate, to determine the rotational stability of the valve core shaft (the core shaft part in the valve used to connect the actuator and the valve core) based on the medium fluctuation information, and to adjust the circulation and / or replenishment of the lubricating medium in the deceleration chamber based on the rotational stability of the valve core shaft.

[0096] Specifically, the detection unit 50 is a sensing subsystem installed in the downstream pipeline of the valve to sense the dynamic characteristics of the fluid medium, and its overall structure is adapted to the industrial valve pipeline; the detection tube 52 is a stainless steel tube or a nickel-plated carbon steel tube, and its inner diameter is set according to the actual installation pipeline specifications; the pipe joint 51 is a clamp-type quick-connect joint, flange joint or threaded joint, used to achieve a sealed connection between the detection unit 50 and the upstream and downstream process pipelines; the fixing seat 53 is fixed to the outer wall of the detection tube 52 by welding or screws, and the other end extends radially into the inner wall of the detection tube 52 and is fixedly connected to the detection shaft by interference fit or threaded connection.

[0097] The first detection sleeve 55 has an annular groove on its side wall for embedding the first sensing plate and the guide plate 56. The first sensing plate is fan-shaped, rectangular, or annular arc segment, and its area is set according to the capacitance detection sensitivity requirements. The guide plate 56 is integrally injection molded with the first detection sleeve 55, or is a separately installed stainless steel sheet. The second sensing plate is a metal sheet of the same material as the first sensing plate, fixed on the detection shaft and stationary with the detection shaft. Its projected position partially overlaps with the first sensing plate, and the area of ​​the overlapping region changes continuously as the first detection sleeve 55 rotates. The second sensing plate and the first sensing plate always remain parallel when the first detection sleeve 55 rotates. The detection connector 54 is similar to the actuator connector 13. The control unit is based on the parallel plate capacitor model formed by the second sensing plate and the first sensing plate, and measures the capacitance value between them. The fluctuation amount can be used to infer the changing trend of the overlapping area A between the two, where To detect the relative permittivity of the medium inside tube 52, d is the vacuum dielectric constant and the distance between the two sensing plates. The control unit receives the analog voltage signal output by the capacitor detection module, and calculates the rate of change of overlap per unit time after sampling by the ADC. When the rate of change exceeds the preset threshold, it is determined that the medium fluctuation is abnormal. Then it is inferred that there is instantaneous jump, eccentricity or meshing impact of the valve core shaft. At this time, the control unit sends an enhanced circulation command to the lubrication medium circulation mechanism or starts a supplementary action to improve the lubrication state in the deceleration chamber and suppress the development of vibration source.

[0098] The detection unit 50 converts the rotational stability of the valve core shaft into the mechanical oscillation of the first detection sleeve 55 through the guide plate 56, and then converts the mechanical oscillation into an electrical signal through the variable capacitor structure formed by the first and second sensing plates. This enables non-contact, real-time sensing of the dynamic operating status of the reducer output. The control unit infers the rotational stability of the valve core shaft based on the fluctuation characteristics of the electrical signal and adjusts the circulation and / or replenishment of the lubricating medium accordingly. This allows for early intervention in the lubrication strategy before the temperature sensor 41 responds to the temperature rise, compensating for the lag of single temperature feedback. The detection unit 50 is installed in the pipeline at the rear end of the valve, without intruding into the actuator body 10, and does not affect the structural integrity of the original reducer.

[0099] In some embodiments, a second detection sleeve 57 is rotatably connected to the detection shaft. A plurality of guide vanes 58 are axially evenly distributed on the sidewall of the second detection sleeve 57. A speed sensor is fixedly connected to the sidewall of the detection shaft covered by the second detection sleeve 57. The speed sensor is electrically connected to the detection connector 54. The control unit is used to determine the flow rate of the medium passing through the detection tube 52 based on the speed signal of the second detection sleeve 57 collected by the speed sensor. When the flow rate of the medium passing through the detection tube 52 is greater than the flow rate threshold, the control unit starts to acquire the overlap fluctuation between the second sensing plate and the first sensing plate.

[0100] Specifically, the speed sensor is a Hall effect, photoelectric, or magnetoelectric speed sensor, with its detection end facing the side wall or end face of the second detection sleeve 57, used for non-contact acquisition of the rotation frequency signal of the second detection sleeve 57; when the second detection sleeve 57 is provided with a sensing toothed ring, magnet, or light-blocking hole, the speed sensor is correspondingly configured as a matching Hall element, light-emitting / receiving pair, or magnetoresistive element; the output signal of the speed sensor is a pulse frequency signal or an analog voltage signal, which is transmitted to the control unit through the detection connector 54, and then converted into the current medium flow rate value by the control unit according to the preset speed-flow mapping relationship model; the mapping relationship model is a linear function, a piecewise linear function, or a lookup table method, and its parameters are derived from the measured fitting results of typical working conditions.

[0101] When the medium begins to flow in the detection tube 52, the second detection sleeve 57 rotates synchronously with the medium flow rate under the action of the guide vane 58; the speed sensor collects its speed in real time and outputs it to the control unit; the control unit converts the speed signal into an equivalent medium flow rate and compares it with a preset flow rate threshold; only when the converted flow rate is continuously greater than the threshold for a preset time, the control unit triggers the start of the sampling cycle for the overlap fluctuation of the first detection sleeve 55; during this period, the relative angle change between the second sensing element and the first sensing element is continuously monitored, and its capacitance value fluctuation is transmitted to the control unit through the detection connector 54 for subsequent valve core shaft rotation stability analysis; this process avoids interference with stability judgment during the low flow and high disturbance stage at the initial opening and closing of the valve, and improves the robustness of state recognition.

[0102] Through the above technical solution, a second detection sleeve 57 with guide vanes 58 is added to the detection shaft, and a speed sensor is configured at the corresponding position to obtain the rotational response caused by the medium flow in real time. The control unit calculates the medium flow rate based on the speed signal and sets the flow rate threshold as the trigger condition. The overlap fluctuation analysis is only started after the medium flow tends to stabilize. This avoids misjudgment caused by natural disturbance in the low flow stage and improves the accuracy of identifying the rotational stability of the valve core shaft and the reliability of system operation.

[0103] In some embodiments, the control unit is signal-connected to an indicator light 18, and the control unit is used to control the indicator light 18 to operate in different ways based on whether lubricating medium circulation is performed or whether lubricating medium replenishment is performed.

[0104] Specifically, the indicator light 18 is an LED indicator light 18 embedded on the outer surface of the upper housing 11 of the actuator. Its installation position is convenient for maintenance personnel to observe intuitively. The electrical interface of the indicator light 18 is electrically connected to the output port of the control unit. The control unit controls the on / off state, color and flashing frequency of the indicator light 18 through PWM signal or high / low level signal.

[0105] The control unit controls the indicator light 18 to operate in different forms based on whether lubricating medium circulation or lubricating medium replenishment is required. These different forms can refer to different color displays, different flashing patterns, different brightness levels, or combinations thereof. For example, when the control unit determines that lubricating medium circulation needs to be initiated, the indicator light 18 displays a solid green light. When the control unit determines that lubricating medium replenishment needs to be performed, the indicator light 18 displays a periodic blue flashing pattern. The flashing period can be set according to actual conditions, and this embodiment does not impose any special limitations on it. When the control unit detects an abnormality in the lubricating medium circulation mechanism or replenishment path, an out-of-limit signal from the temperature sensor 41, or a media pump malfunction, the indicator light 18 displays an alternating red flashing pattern. The color switching and operating mode switching of the indicator light 18 are both triggered by a preset logic program within the control unit. This logic program is stored in the control unit's non-volatile memory and can be reset according to the on-site working conditions via an external debugging device connected to the actuator connector 13. However, this embodiment does not limit the specific reset method.

[0106] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A deceleration device for a valve intelligent actuator, comprising an actuator body (10) and a reducer body (20), wherein the reducer body (20) is integrated within the actuator body (10), characterized in that, The actuator body (10) integrates a lubricating medium circulation mechanism; The actuator body (10) includes an upper actuator housing (11) and a lower actuator housing (12), which are fixedly connected. The upper actuator housing (11) is provided with a drive unit (14), and the reducer body (20) is fixedly connected between the upper actuator housing (11) and the lower actuator housing (12). The reducer body (20) includes an upper reducer housing (21) and a lower reducer housing (22), which are fixedly connected. The upper reducer housing (21) and the lower reducer housing (22) form a reduction chamber inside the upper reducer housing (21) and the lower reducer housing (22), and a reduction gear set is provided inside the reduction chamber. The output shaft of the drive component (14) is connected to the reduction gear set, and a valve core is connected to the reduction gear set. The lubricating medium circulation mechanism is connected to the reduction chamber. A temperature sensor (41) is fixedly connected to the upper reducer housing (21) or the lower reducer housing (22), and the detection end of the temperature sensor (41) extends into the reduction chamber. The lubricating medium circulation mechanism is used to circulate and / or replenish the lubricating medium in the deceleration chamber based on the temperature change collected by the temperature sensor (41) after the drive unit (14) is started.

2. The deceleration device of the intelligent valve actuator according to claim 1, characterized in that, The actuator housing (11) is provided with a mounting groove, and the drive component (14) is fixedly connected in the mounting groove. The actuator housing (11) is provided with an actuator connector (13). The actuator housing (11) is provided with a control unit. The control unit is electrically connected to the actuator connector (13), the drive component (14) and the temperature sensor (41). The control unit is used to acquire the temperature signal collected by the temperature sensor (41) and control the operation of the drive component (14) and the lubricating medium circulation mechanism. The lower housing (12) of the actuator is rotatably connected to the actuator output shaft (17). One end of the actuator output shaft (17) is connected to the reduction gear set for transmission, and the other end of the actuator output shaft (17) is fixedly connected to the valve core.

3. The deceleration device of the intelligent valve actuator according to claim 2, characterized in that, The upper housing (21) of the reducer is rotatably connected to an input shaft (23), and the input shaft (23) is coaxially and fixedly connected to the output shaft of the drive component (14); The reduction gear set includes a sun gear (25) fixedly connected to the input shaft (23) on the same axis and a gear sleeve (30) fixedly connected to the side wall of the reduction chamber. Several planet gears (26) mesh between the sun gear (25) and the gear sleeve (30), and the planet gears (26) are rotatably connected to the planet shaft. The lower housing (22) of the reducer is rotatably connected to the output flange (27), and the planetary shafts are rotatably connected to the output flange (27). The output flange (27) is coaxially fixedly connected to the reduction output shaft (28), and the reduction output shaft (28) is coaxially sleeved with the output connecting sleeve (29). The output connecting sleeve (29) is coaxially sleeved with the actuator output shaft (17).

4. The deceleration device of the intelligent valve actuator according to claim 3, characterized in that, The input shaft (23) extends into the deceleration chamber, and the portion of the input shaft (23) extending into the deceleration chamber is coaxially and fixedly connected to the stirring blade (24).

5. The deceleration device of the intelligent valve actuator according to claim 4, characterized in that, The lubricating medium circulation mechanism includes a medium storage box (15) embedded in the lower housing (12) of the actuator. The medium storage box (15) is used to temporarily store the lubricating medium. A medium pipeline (42) is provided between the medium storage box (15) and the deceleration chamber. A medium pump is provided in the medium pipeline (42). The medium pump is connected to the control unit. The control unit is used to control the operation of the medium pump based on the temperature change collected by the temperature sensor (41) after the drive unit (14) is started, so that the lubricating medium circulates between the medium storage box (15) and the deceleration chamber, or replenishes the lubricating medium temporarily stored in the medium storage box (15) into the deceleration chamber.

6. The reduction gear of the intelligent valve actuator according to claim 5, characterized in that, The number of media pipelines (42) is at least two. The media pipelines (42) are connected to a multi-channel solenoid valve (43). The multi-channel solenoid valve (43) is connected to the media storage box (15) through the media pipelines (42). The media pipelines (42) are fixed to the upper housing (21) and the lower housing (22) of the reducer respectively. The connection position of the media pipelines (42) with the reduction chamber is located in the area covered by the upper housing (21) and the area covered by the lower housing (22).

7. The deceleration device of the intelligent valve actuator according to claim 6, characterized in that, It also includes a detection unit (50), which is connected to the rear end of the valve. The detection unit (50) includes a detection tube (52), and pipe joints (51) are provided at both ends of the detection tube (52). A fixed seat (53) is fixedly connected to the side wall of the detection tube (52). The fixed seat (53) extends to the inner side wall of the detection tube (52). A detection shaft is fixedly connected to the fixed seat (53). A first detection sleeve (55) is rotatably connected to the detection shaft. A first sensing plate is fixedly connected to the inner side wall of the first detection sleeve (55). A guide plate (56) is fixedly connected to the inner side wall of the first detection sleeve (55). The first detection sleeve (55) covers the detection shaft side wall and is fixedly connected to the second sensing plate. The second sensing plate and the first sensing plate are electrically connected to the detection connector (54). The detection connector (54) is electrically connected to the actuator connector (13). The control unit is used to determine the medium fluctuation information in the detection tube (52) based on the overlap fluctuation between the second sensing plate and the first sensing plate, to determine the rotational stability of the valve core shaft based on the medium fluctuation information, and to adjust the circulation and / or replenishment of the lubricating medium in the deceleration chamber based on the rotational stability of the valve core shaft.

8. The deceleration device of the intelligent valve actuator according to claim 7, characterized in that, Both the second and first sensing plates are metal sheets, and the second and first sensing plates remain parallel when the first detection sleeve (55) rotates. The control unit obtains the overlap fluctuation between the second and first sensing plates based on the capacitance fluctuation between the second and first sensing plates.

9. The reduction gear of the intelligent valve actuator according to claim 8, characterized in that, The detection shaft is rotatably connected to a second detection sleeve (57). Several guide vanes (58) are evenly distributed axially on the side wall of the second detection sleeve (57). A speed sensor is fixedly connected to the side wall of the detection shaft covered by the second detection sleeve (57). The speed sensor is electrically connected to the detection connector (54). The control unit is used to determine the flow rate of the medium passing through the detection tube (52) based on the rotational speed signal of the second detection sleeve (57) collected by the rotational speed sensor. When the flow rate of the medium passing through the detection tube (52) is greater than the flow rate threshold, it starts to acquire the overlap fluctuation between the second sensing plate and the first sensing plate.

10. The deceleration device of the intelligent valve actuator according to claim 9, characterized in that, The control unit is connected to an indicator light (18). The control unit controls the indicator light (18) to operate in different ways based on whether the lubricating medium is circulated or replenished.

Images