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CN-122014899-A - Speed reducer of intelligent valve actuator

CN122014899ACN 122014899 ACN122014899 ACN 122014899ACN-122014899-A

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 circulation mechanism; the speed reducer body is integrated in the actuator body and fixedly connected between the actuator upper shell and the actuator lower shell, a speed reducing cavity is formed in the speed reducer upper shell and the actuator lower shell, a speed reducing gear set is arranged in the speed reducing cavity, an output shaft of a driving piece is in transmission connection with the speed reducing gear set, the speed reducing gear set is in transmission connection with a valve core, a 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 lubricating medium in the speed reducing cavity. According to the invention, according to the actual running state of the speed reducer, the circulating flow of the lubricating medium is automatically promoted, the quantity of the lubricating medium is regulated, and the flowing of the lubricating medium and the quantity of the lubricating medium are dynamically adapted to the working condition of the speed reducer.

Inventors

  • XIONG FEI
  • YU YINGYING

Assignees

  • 博雷（中国）控制系统有限公司

Dates

Publication Date
20260512
Application Date
20260319

Claims (10)

  1. 1. The speed reducer of the intelligent valve actuator comprises an actuator body (10) and a speed reducer body (20), wherein the speed reducer body (20) is integrated in the actuator body (10), and is characterized in that a lubricating medium circulation mechanism is integrated in the actuator body (10); The actuator body (10) comprises an actuator upper shell (11) and an actuator lower shell (12), the actuator upper shell (11) is fixedly connected with the actuator lower shell (12), the actuator upper shell (11) is provided with a driving piece (14), and the speed reducer body (20) is fixedly connected between the actuator upper shell (11) and the actuator lower shell (12); The speed reducer body (20) comprises a speed reducer upper shell (21) and a speed reducer lower shell (22), wherein the speed reducer upper shell (21) is fixedly connected with the speed reducer lower shell (22), a speed reduction cavity is formed inside the speed reducer upper shell (21) and the speed reducer lower shell (22), a speed reduction gear set is arranged in the speed reduction cavity, an output shaft of a driving piece (14) is in transmission connection with the speed reduction gear set, a valve core is in transmission connection with the speed reduction gear set, a lubricating medium circulation mechanism is communicated with the speed reduction cavity, a temperature sensor (41) is fixedly connected with the speed reducer upper shell (21) or the speed reducer lower shell (22), and a detection end of the temperature sensor (41) extends into the speed reduction cavity; The lubricating medium circulation mechanism is used for circulating and/or supplementing the lubricating medium in the speed reducing cavity based on the temperature change acquired by the temperature sensor (41) after the driving piece (14) is started.
  2. 2. The speed reducer of the intelligent valve actuator according to claim 1, wherein the upper actuator shell (11) is provided with a mounting groove, the driving piece (14) is fixedly connected in the mounting groove, the upper actuator shell (11) is provided with an actuator joint (13), the upper actuator shell (11) is internally provided with a control unit, the control unit is electrically connected with the actuator joint (13), the driving piece (14) and the temperature sensor (41), and the control unit is used for acquiring temperature signals acquired by the temperature sensor (41) and controlling the driving piece (14) and the lubricating medium circulation mechanism to operate; The lower shell (12) of the actuator is rotationally connected with an output shaft (17) of the actuator, one end of the output shaft (17) of the actuator is in transmission connection with the reduction gear set, and the other end of the output shaft (17) of the actuator is fixedly connected with the valve core.
  3. 3. The speed reducer of the intelligent valve actuator according to claim 2, wherein the upper housing (21) of the speed reducer is rotatably connected with an input shaft (23), and the input shaft (23) is fixedly connected with the output shaft of the driving member (14) in a coaxial manner; the speed reduction gear set comprises a sun gear (25) which is coaxially and fixedly connected with the input shaft (23) and a tooth sleeve (30) which is fixedly connected with the side wall of the speed reduction cavity, a plurality of planet gears (26) are meshed between the sun gear (25) and the tooth sleeve (30), and the planet gears (26) are rotationally connected with a planet shaft; The lower shell (22) of the speed reducer is rotationally connected with an output flange (27), planetary shafts are rotationally connected with the output flange (27), the output flange (27) is coaxially and fixedly connected with a speed reduction output shaft (28), the speed reduction output shaft (28) is coaxially sleeved with an output connecting sleeve (29), and the output connecting sleeve (29) is coaxially sleeved with an output shaft (17) of the actuator.
  4. 4. A valve intelligent actuator's decelerator according to claim 3 characterized in that the input shaft (23) extends into the deceleration chamber and the part of the input shaft (23) extending into the deceleration chamber is fixedly connected with stirring blades (24) coaxially.
  5. 5. The deceleration device of the intelligent valve actuator according to claim 4, wherein the lubricating medium circulation mechanism comprises a medium storage box (15) embedded in a lower shell (12) of the actuator, wherein the medium storage box (15) is used for temporarily storing lubricating medium, a medium pipeline (42) is communicated between the medium storage box (15) and the deceleration cavity, a medium pump is communicated with the medium pipeline (42), and the medium pump is in signal connection with the control unit; The control unit is used for controlling the operation of the medium pump based on the temperature change acquired by the temperature sensor (41) after the driving piece (14) is started, so that the lubricating medium circularly flows between the medium storage box (15) and the speed reducing cavity, or the lubricating medium temporarily stored in the medium storage box (15) is supplemented into the speed reducing cavity.
  6. 6. The valve intelligent actuator's decelerator according to claim 5, characterized in that the number of medium pipelines (42) is at least two, the medium pipelines (42) are provided with multi-way solenoid valves (43) in communication, the multi-way solenoid valves (43) are communicated with the medium storage box (15) through the medium pipelines (42), and the medium pipelines (42) are respectively fixed to the decelerator upper shell (21) and the decelerator lower shell (22), and the communication positions of the medium pipelines (42) with the deceleration cavity are divided into the coverage area of the decelerator upper shell (21) and the coverage area of the decelerator lower shell (22).
  7. 7. The speed reducer of the intelligent valve actuator according to claim 6, further comprising a detection unit (50), wherein the detection unit (50) is communicated with the rear end of the valve, the detection unit (50) comprises a detection pipe (52), pipe joints (51) are arranged at two ends of the detection pipe (52), a fixing seat (53) is fixedly connected to the side wall of the detection pipe (52), the fixing seat (53) extends to the inner side wall of the detection pipe (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 induction plate is fixedly connected to the inner side wall of the first detection sleeve (55), and a guide plate (56) is fixedly connected to the inner side wall of the first detection sleeve (55); the side wall of the detection shaft covered by the first detection sleeve (55) is fixedly connected with a second induction piece, the second induction piece and the first induction piece are electrically connected with a detection joint (54), and the detection joint (54) is electrically connected with the actuator joint (13); The control unit is used for judging medium fluctuation information in the detection tube (52) based on the coincidence fluctuation between the second induction piece and the first induction piece, judging the rotation stability of the valve core shaft based on the medium fluctuation information, and adjusting the circulation and/or the supplement quantity of the lubricating medium in the speed reducing cavity based on the rotation stability of the valve core shaft.
  8. 8. The deceleration device of the intelligent valve actuator according to claim 7, wherein the second sensing piece and the first sensing piece are both metal pieces, and the second sensing piece and the first sensing piece are always kept in a parallel state when the first detecting sleeve (55) rotates, and the control unit obtains the fluctuation of the degree of coincidence between the second sensing piece and the first sensing piece based on the fluctuation of the capacitance value between the second sensing piece and the first sensing piece.
  9. 9. The speed reducer of the intelligent valve actuator according to claim 8, wherein the detection shaft is rotatably connected with a second detection sleeve (57), a plurality of guide vanes (58) are axially and uniformly distributed on the side wall of the second detection sleeve (57), a rotation speed sensor is fixedly connected to the side wall of the detection shaft covered by the second detection sleeve (57), and the rotation speed sensor is electrically connected with a detection joint (54); the control unit is used for judging the medium flow passing through the detection tube (52) based on the rotating speed signal of the second detection sleeve (57) acquired by the rotating speed sensor, and when the medium flow passing through the detection tube (52) is larger than a flow threshold value, the contact ratio fluctuation between the second sensing piece and the first sensing piece is acquired.
  10. 10. The deceleration device of the valve intelligent actuator according to claim 9, characterized in that the control unit is signally connected with an indicator lamp (18), the control unit being adapted to control the indicator lamp (18) to operate in different forms based on whether a lubrication medium circulation is performed or whether a lubrication medium replenishment is performed.

Description

Speed reducer of intelligent valve actuator Technical Field The invention relates to the technical field of valve actuators, in particular to a speed reducing device of an intelligent valve actuator. Background The valve electric actuator is used as a core execution unit for industrial automation control, and converts motor power into accurate torque output through a speed reducer, so that the opening and closing and adjusting functions of the valve are realized, and the running stability of the valve electric actuator directly determines the safety and process precision of a fluid control system. The speed reducer is used as a core component for power transmission, the meshing motion and the bearing rotation of the internal transmission pair are both dependent on a lubricating medium (mainly lubricating grease) to realize antifriction, wear resistance, heat dissipation and sealing protection, and the quantity effect matching of the lubricating medium is a key factor for guaranteeing the service life of the speed reducer and the reliability of an actuator. The conventional valve actuator speed reducer adopts a passive mode of filling fixed quantity and periodically maintaining and supplementing, namely, filling fixed quantity of lubricating grease according to theoretical working conditions when leaving a factory, and manually supplementing or replacing grease according to a preset period in the use process. In order to adapt to different working condition demands, technical specifications for selecting lubricating grease according to conditions such as temperature, load and the like are formed in the industry, for example, polyurea-based lubricating grease is selected for high-temperature working conditions, and low-temperature special lubricating grease is selected for cold areas so as to improve the environmental adaptability of a lubricating medium. Meanwhile, a self-adaptive lubrication system based on a temperature-flow double closed loop appears in part of speed reducers of large industrial equipment, and the flow of lubricating oil is regulated through a variable-frequency oil pump so as to match with the change of load power. However, aiming at the special application scene of the valve actuator speed reducer, the prior art still has the defect that the prior art is difficult to overcome, the core problem is concentrated on the lack of self-regulating capability of the lubricating medium quantity, and the actual operation requirement of the speed reducer cannot be dynamically adapted. Because of lacking the autonomous regulating capability of the lubricating medium quantity, the lubricating requirement change caused by the fluctuation of the dynamic adaptation working condition is difficult, so that the service life of the speed reducer is shortened, the failure rate of the actuator is increased, and the stability and the safety of an industrial fluid control system are seriously affected. Disclosure of Invention In order to solve the problems, the invention provides a speed reducing device of an intelligent valve actuator, which is used for automatically adjusting the quantity of lubricating medium according to the actual running state of a speed reducer of the actuator, so that the quantity of the lubricating medium is dynamically adapted to the working condition of the speed reducer of the actuator. In order to achieve the aim, the technical scheme of the invention is that the speed reducer of the valve intelligent actuator comprises an actuator body and a speed reducer body, wherein the speed reducer body is integrated in the actuator body, and a lubricating medium circulating mechanism is integrated in the actuator body; The actuator body comprises an actuator upper shell and an actuator lower shell, the actuator upper shell is fixedly connected with the actuator lower shell, the actuator upper shell is provided with a driving piece, and the speed reducer body is fixedly connected between the actuator upper shell and the actuator lower shell; the speed reducer body comprises a speed reducer upper shell and a speed reducer lower shell, wherein the speed reducer upper shell is fixedly connected with the speed reducer lower shell, a speed reduction cavity is formed inside the speed reducer upper shell and the speed reducer lower shell, a speed reduction gear set is arranged in the speed reduction cavity, an output shaft of a driving piece is in transmission connection with the speed reduction gear set, and the speed reduction gear set is in transmission connection with a valve core; The lubricating medium circulation mechanism is used for circulating and/or supplementing the lubricating medium in the speed reducing cavity based on the temperature change acquired by the temperature sensor after the driving piece is started. The technical principle of the scheme is as follows: the valve actuator shell is constructed through the upper actuator shell and the lower actuator shell, the speed reducer bo