A smart mechanical stepless speed regulating device for oilfield equipment that can operate without stopping

Abstract

This invention proposes an intelligent mechanical stepless speed regulation device for oilfield equipment that operates without shutdown, belonging to the field of petrochemical extraction, manufacturing, and deep processing. It solves the problems of low working efficiency, gear differences, and abrupt speed changes between gears in existing mechanical manual multi-gear transmissions. Its drive motor drives the input shaft, which is connected to a primary speed-increasing mechanism. After speed increase and torque reduction, the power is transmitted to the drive wheel shaft. The drive wheel shaft drives the drive cone wheel to rotate. Both the drive and driven cone wheels are covered with a steel belt. The drive cone wheel drives the steel belt, thus transmitting power to the driven cone wheel. The driven cone wheel drives the driven wheel shaft, which is connected to a secondary speed regulation mechanism. After speed adjustment by the secondary mechanism, the power is transmitted to the output shaft. This invention uses chain or belt drive instead of multiple gear pairs, achieving different speed ratios by changing the contact radius between the drive and driven cone wheels and the chain or belt.

Description

Technical Field

[0001] This invention belongs to the field of petrochemical extraction, manufacturing and deep processing, and in particular relates to an intelligent mechanical stepless speed regulation device for oilfield equipment that can operate without stopping. Background Technology

[0002] Oilfield equipment such as pumping units require varying operating speeds depending on the specific oil extraction conditions. Currently, mechanical multi-speed manual transmissions are commonly used. Figure 1 As shown, this is achieved through manual gear shifting. When shifting gears in a manual gearbox, it is generally necessary to stop the equipment or enter a semi-stopped state, i.e., cut off power transmission or decelerate, and then restart the power after the shift is completed. Since cutting off power, decelerating, manually shifting, and restarting all require a certain amount of operation time, this reduces the working efficiency of equipment such as the pumping unit and also incurs labor costs. Furthermore, for an oil pumping unit to operate ideally, it theoretically needs an unlimited number of gears. However, multi-gear speed control devices can only provide a limited number of gears, and there are gear increments and abrupt speed changes between gears. This means that the gears of the multi-gear gearbox cannot fully match the operating conditions of equipment such as the pumping unit, causing the main drive motor to operate in an inefficient range, thus reducing motor efficiency and resulting in high system power consumption. Summary of the Invention

[0003] In view of this, in order to solve the problems of low working efficiency, gear differences, and speed jumps between gears in existing mechanical manual multi-gear transmissions, this invention proposes an intelligent mechanical stepless speed regulation device for oilfield equipment that can operate without stopping.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an intelligent mechanical stepless speed regulation device for oilfield equipment that allows for continuous operation, comprising a drive motor, a primary speed-increasing mechanism, a driving conical pulley, a steel belt, a driven conical pulley, a secondary speed regulation mechanism, an input shaft, a driving wheel axle, a driven wheel axle, and an output shaft. The drive motor drives the input shaft, which is connected to the first-stage speed-increasing mechanism. After speed increase and torque reduction, the power is transmitted to the drive wheel shaft. The drive wheel shaft drives the drive cone wheel to rotate. The drive cone wheel and the driven cone wheel are covered with a steel belt. The drive cone wheel drives the steel belt, thereby transmitting power to the driven cone wheel. The driven cone wheel drives the driven wheel shaft, which is connected to the second-stage speed regulating mechanism. After speed regulation by the second-stage speed regulating mechanism, the power is transmitted to the output shaft.

[0005] Furthermore, the active cone wheel includes an active cone wheel piston cylinder and an active cone wheel piston. One side of the active cone wheel piston cylinder is fixedly connected to the active wheel shaft. The active cone wheel piston cylinder and the active cone wheel piston form a sealed hydraulic cylinder through a seal. The active cone wheel piston is connected to the active wheel shaft through a spline or a flat key. The active cone wheel piston can move axially along the active wheel shaft.

[0006] Furthermore, the sealed hydraulic cylinder is connected to the drive wheel shaft through the drive cone wheel oil hole, and then connected to the drive cone wheel oil circuit. When shifting up, the pressurized oil enters the sealed hydraulic cylinder formed by the drive cone wheel piston and the drive cone wheel piston cylinder through the drive cone wheel oil circuit and the drive cone wheel oil hole, pushing the drive cone wheel piston to press the steel belt.

[0007] Furthermore, the passive cone wheel includes a passive cone wheel piston and a passive cone wheel piston cylinder. The passive cone wheel piston cylinder and the passive cone wheel piston form a sealed hydraulic cylinder through a seal. The passive cone wheel piston is connected to the passive wheel shaft through a spline or a flat key. The passive cone wheel piston can move axially along the passive wheel shaft.

[0008] Furthermore, the sealed hydraulic cylinder is connected to the driven wheel shaft through the driven cone wheel oil hole, and then connected to the driven cone wheel oil circuit. When shifting gears, the pressurized oil enters the sealed hydraulic cylinder formed by the driven cone wheel piston and the driven cone wheel piston cylinder through the driven cone wheel oil circuit and the driven cone wheel oil hole, pushing the driven cone wheel piston to press the steel belt.

[0009] Furthermore, when the hydraulic oil flows out, the passive cone wheel piston retracts, and the steel belt moves radially under the action of the steel belt preload. Under the action of the return spring, the passive cone wheel piston maintains the minimum distance between the two cone surfaces.

[0010] Furthermore, the intelligent mechanical stepless speed regulation device for oilfield equipment without shutting down also includes an active cone wheel speed sensor and a passive cone wheel speed sensor, which are used to monitor the speed of the active cone wheel and the passive cone wheel, respectively.

[0011] Furthermore, the hydraulic valve body module includes a main oil circuit, a pressure filter and relief valve, a motor and hydraulic pump, a suction filter, a pressure filter, an active servo directional valve, and a passive servo directional valve. The motor and hydraulic pump build up hydraulic pressure through the suction filter, and after pressure filtration, the hydraulic oil is sent to the main oil circuit. After passing through the pressure relief valve, it is distributed to the active servo directional valve and the passive servo directional valve. After passing through the two valves, it is connected to the active cone wheel oil circuit and the passive cone wheel oil circuit. During operation, the hydraulic valve body module receives a PLC command, and the motor and hydraulic pump work to build up the main oil pressure. After adjustment by the relief valve, a stable oil pressure is formed. Under the PID control of the PLC, the active cone wheel servo valve and the passive cone wheel servo valve open to the corresponding degree, adjust the oil pressure and inject it into the active and passive cone wheel cylinders, push the cylinders to move, and complete the gear shifting and speed regulation.

[0012] Furthermore, the hydraulic valve body module also includes a passive buffer valve, an active buffer valve, a passive oil circuit sensor, and an active oil circuit sensor. The passive buffer valve and the active buffer valve are installed after the active servo directional valve and the passive servo directional valve, respectively. The active conical wheel oil circuit is connected to the active oil circuit sensor, and the passive conical wheel oil circuit is connected to the passive oil circuit sensor.

[0013] Furthermore, when the PLC receives a shift command, it calculates the target speed by reading the speeds of the active and passive cone wheel speed sensors. After further calculation, it outputs electrical signals to the active and passive servo directional valves. Upon receiving the command, the servo directional valves open their valve cores to the corresponding degree, pushing the cone wheel of the reduction mechanism to shift gears. The PLC then reads the speeds of the active and passive cone wheel speed sensors to determine whether the target has been reached, thus forming a closed-loop PID control to achieve the target output speed.

[0014] Compared with the prior art, the beneficial effects of the intelligent mechanical stepless speed regulation device for oilfield equipment that allows for non-stop operation as described in this invention are: 1. This invention uses chain or belt drive instead of multiple pairs of gears, and achieves different speed ratios by changing the contact radius between the driving and driven conical pulleys and the chain or belt.

[0015] 2. This invention employs a conical wheel in conjunction with a chain or belt for transmission. Because the chain or belt contacts the inclined surface of the conical wheel, applying an axial force to the wheel causes it to simultaneously press against the chain or belt and push the chain or belt radially along the wheel. As the applied axial force changes, the chain or belt achieves different contact radii with the conical wheel, thus enabling continuous, stepless speed ratio adjustment. After stepless speed regulation by the chain or belt, the speed is further reduced and torque increased via gear pairs, worm gear pairs, and other transmission mechanisms, achieving a match between speed ratio and torque.

[0016] 3. To solve the problem of low torque transmission in chain or belt drives, this invention adds a speed-increasing device, such as a gear pair, to the motor output end. By increasing the speed, the motor torque is reduced, thereby solving the problem that chains or belts cannot transmit large torques.

[0017] 4. This invention uses a hydraulic cylinder as the shifting actuator, and a conical wheel as the piston of the hydraulic cylinder, which drives the hydraulic cylinder to move under the action of pressurized oil. By controlling the hydraulic pressure, the displacement of the hydraulic piston, i.e., the conical wheel, is controlled.

[0018] 5. With the center distance between the two cone pulleys remaining constant, this invention achieves pressure coordination between the active and passive pulleys by adding a hydraulic relief valve, thereby enabling the belt or chain to operate with a constant center distance and to continuously shift gears.

[0019] 6. The main structural components of this invention are a conical driving wheel and a driven wheel, as well as a chain or belt. A variable chain or belt drive is used to achieve stepless speed regulation. Compared with existing manual limit speed regulation devices, only a change in the axial force of the conical wheel is needed to achieve variable chain or belt drive, thereby realizing stop-free speed regulation and stepless speed regulation, solving the problems of stopping and gear level differences.

[0020] 7. This invention enables continuous speed change without shutting down the machine, thus avoiding the waste of time associated with gear shifting and power switching. Furthermore, it allows for stepless speed regulation across the entire operating speed ratio range of equipment such as oil pumping units, meaning it can operate at any speed ratio (gear) as needed. Therefore, it can more perfectly match the speed requirements of equipment such as oil pumping units.

[0021] 8. This invention can also achieve intelligent control. By controlling the hydraulic servo valve through a PLC, the pressure of the hydraulic oil circuit is controlled. The pressurized oil, through the action of the hydraulic cylinder, drives the conical wheel to achieve stepless speed regulation of the steel belt or chain. Furthermore, the communication and connection between the PLC and automated and intelligent equipment such as oil pumping units can enable collaboration with main working machines such as pumping units. The main working machine issues shifting commands according to work needs, and the speed regulating device can automatically switch to the target speed ratio. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the manual mechanical speed regulating device mentioned in the background art of this invention; Figure 2 This is a schematic diagram illustrating the working principle of the intelligent mechanical stepless speed regulation device for oilfield equipment that allows for continuous operation, as described in this invention. Figure 3 This is a perspective view of the intelligent mechanical stepless speed regulation device for oilfield equipment that allows for continuous operation, as described in this invention. Figure 4 This is a schematic diagram of the hydraulic actuator of the intelligent mechanical stepless speed regulation device for oilfield equipment that can operate without stopping, as described in this invention. Figure 5 This is a schematic diagram of the hydraulic valve body module of the intelligent mechanical stepless speed regulation device for oilfield equipment that is not shut down, as described in this invention. Figure 1 ; Figure 6 This is a schematic diagram of the hydraulic valve body module of the intelligent mechanical stepless speed regulation device for oilfield equipment that is not shut down, as described in this invention. Figure 2 ; Figure 7 This is a schematic diagram of the hydraulic system of the intelligent mechanical stepless speed regulation device for oilfield equipment that can operate without stopping, as described in this invention. In the diagram: 10-Drive motor, 20-First-stage speed increaser, 30-Active conical wheel piston cylinder (fixed end), 31-Active conical wheel piston (movable end), 33-Active conical wheel oil hole, 40-Steel belt, 50-Driven conical wheel, 51-Driven conical wheel piston (movable end), 52-Driven conical wheel piston cylinder (fixed end), 53-First seal, 54-Second seal, 55-Return spring, 56-Driven conical wheel oil hole, 60-Second-stage speed control mechanism, 70-Output pulley, 80-Input shaft, 90-Active wheel shaft, 100-Driven wheel shaft, 110-Output shaft, 112 - Passive cone wheel cylinder, 120- Connect to active cone wheel oil circuit, 130- Connect to passive cone wheel oil circuit, 140- Active cone wheel speed sensor, 150- Passive cone wheel speed sensor, 200- Motor and hydraulic pump, 210- Filter, 230- Oil pan, 240- Active servo directional valve, 250- Passive servo directional valve, 260- Passive buffer valve, 270- Connect to passive oil circuit sensor, 280- Connect to active oil circuit sensor, 290- Active buffer valve, 300- Main oil circuit sensor, 310- Main oil circuit, 320- Pressure filter and overflow valve, 302- Suction filter, 303- Pressure filter. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the drawings, and not all of them. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the invention.

[0024] See Figure 2-7 This embodiment describes an intelligent mechanical stepless speed regulation device for oilfield equipment that allows for continuous operation, comprising a drive motor 10, a primary speed-increasing mechanism 20, an active conical wheel, a steel belt 40, a passive conical wheel 50, a secondary speed regulation mechanism 60, an input shaft 80, an active wheel shaft 90, a passive wheel shaft 100, and an output shaft 110.

[0025] like Figure 2As shown, power is output from the drive motor 10 to the input shaft 80 of the intelligent gearbox. The input shaft 80 is connected to the first-stage speed-increasing mechanism 20, which, after speed increase and torque reduction, transmits the power to the drive wheel shaft 90. The drive wheel shaft 90 drives the drive cone wheel to rotate. The drive cone wheel and the driven cone wheel 50 are covered by a steel belt 40. The drive cone wheel drives the steel belt 40, thereby transmitting power to the driven cone wheel 50. The driven cone wheel 50 drives the driven wheel shaft 100. The driven wheel shaft 100 is connected to the second-stage speed regulating mechanism 60. After speed regulation by the second-stage speed regulating mechanism 60, the power is transmitted to the output shaft 110, which drives the output pulley 70 and other output power.

[0026] The active conical wheel includes an active conical wheel piston cylinder (fixed end) 30 and an active conical wheel piston (movable end) 31. One side of the active conical wheel piston cylinder 30 is fixedly connected to the active wheel shaft 90. The active conical wheel piston cylinder 30 and the active conical wheel piston 31 form a sealed hydraulic cylinder through a seal. The active conical wheel piston 31 is connected to the active wheel shaft 90 through a spline or flat key, etc., and the active conical wheel piston 31 can move axially along the active wheel shaft 90.

[0027] The sealed hydraulic cylinder is connected to the drive wheel shaft 90 through the drive cone wheel oil hole 33 and the drive cone wheel oil passage 120. When shifting up, pressurized oil enters the hydraulic cylinder formed by the drive cone wheel piston 31 and the drive cone wheel piston cylinder 30 through the drive cone wheel oil passage 120 and the drive cone wheel oil hole 33. This pushes the drive cone wheel piston 31 to press against the steel belt 40. Under the radial component of the cone surface force, it moves radially, thereby increasing the contact position between the drive cone wheel piston cylinder 30 and the steel belt 40, which is equivalent to increasing the size of the drive wheel, thus increasing the speed ratio.

[0028] The passive conical wheel 50 includes a passive conical wheel piston (movable end) 51 and a passive conical wheel piston cylinder (fixed end) 52. The passive conical wheel piston cylinder 52 is fixedly connected to the driving wheel shaft 90. The passive conical wheel piston cylinder 52 and the passive conical wheel piston 51 form a sealed hydraulic cylinder through seals 53 and 54. The passive conical wheel piston 51 is connected to the passive wheel shaft 100 through a spline or flat key, etc. The passive conical wheel piston 51 can move axially along the passive wheel shaft 100.

[0029] The sealed hydraulic cylinder is connected to the driven wheel axle 100 through the driven cone wheel oil hole 56 and the driven cone wheel oil passage 130. During gear shifting, pressurized oil enters the hydraulic cylinder formed by the driven cone wheel piston 51 and the driven cone wheel piston cylinder 52 through the driven cone wheel oil passage 130 and the driven cone wheel oil hole 56, pushing the driven cone wheel piston 51 to press against the steel belt 40. Under the action of the radial component force of the cone surface, it moves radially, thereby changing the meshing position with the cone wheel. When the hydraulic oil flows out, the driven cone wheel piston 51 retracts, and the steel belt 40 moves radially under the action of the steel belt preload. Under the action of the return spring 55, the driven cone wheel piston 51 can maintain the minimum distance between the two cone surfaces. At this time, the speed ratio reaches its maximum.

[0030] Gear shifting and speed adjustment process: After the target gear shift ratio is set, the speed of the passive cone wheel sensor 50 can be calculated by the active cone wheel speed sensor 140. By adjusting the hydraulic pressure of the active cone wheel and the passive cone wheel, the contact position of the active cone wheel piston cylinder 30, the passive cone wheel 50 and the steel belt 40 is adjusted to achieve the required gear shift ratio.

[0031] like Figure 3 As shown in the embodiment, power is input through input shaft 10, and after passing through the first-stage speed-increasing mechanism 20, the torque decreases and is transmitted to the driving cone pulley. Then, through the steel belt 40, the power is transmitted to the driven cone pulley 50. Finally, through the second-stage speed-regulating mechanism 60, the torque at the target speed, i.e., the power, is output from output shaft 110. By adjusting the driving cone pulley piston 31 and the driven cone pulley piston 51 (the movable end of the cone pulley), axial force or displacement control can be used to adjust the speed, causing the steel belt 40 to move to different radial positions under the action of the axial force of the cone pulley, producing different speed ratios. This achieves stepless and uninterrupted speed regulation for the entire device.

[0032] Figure 4 In this embodiment of the internal hydraulic actuator of the conical wheel, the driven wheel shaft 100 is fixedly connected to the driven conical wheel cylinder 112. The driven conical wheel piston 51 is mounted on the driven wheel shaft 100 via a spline, thus allowing the driven conical wheel piston 51 to move on the driven wheel shaft 100. A seal is used to seal between the driven conical wheel piston cylinder 52 and the driven conical wheel piston 51. An oil pipe 150 is provided on the driven wheel shaft 100, communicating with the hydraulic cylinder formed between the driven conical wheel piston cylinder 52 and the driven conical wheel piston 51, and is connected to the driven conical wheel oil passage 130. A return spring 55 is installed between the driven conical wheel piston cylinder 52 and the driven conical wheel piston 51 to ensure minimum pressure between the driven conical wheels after the hydraulic oil is discharged.

[0033] Similarly, the active cone wheel piston 31 is connected to the oil cylinder formed by the seal through the active cone wheel oil hole 33, and is also connected to the passive cone wheel oil passage 130 through the active cone wheel oil passage 120. During operation, under the action of hydraulic oil, the active cone wheel piston 31 moves, thereby clamping or releasing the active cone wheel piston cylinder 30.

[0034] Figure 5-6 As an embodiment of the hydraulic valve body module, the hydraulic valve body module includes a main oil circuit 310, a pressure filter and relief valve 320, a motor and hydraulic pump 200, a suction filter 302, a pressure filter 303, an active servo directional valve 240, a passive servo directional valve 250, an active cone wheel buffer valve 290, and a pressure filter and relief valve 320. The motor and hydraulic pump 200 establishes oil pressure for the hydraulic oil through the suction filter 302, and after passing through the pressure filter 303, it sends the oil to the main oil circuit 310. After passing through the pressure relief valve, it is then distributed to the active servo directional valve 240 and the passive servo directional valve 250. After passing through the two valves, it is connected to the above-mentioned active cone wheel oil circuit 120 and passive cone wheel oil circuit 130.

[0035] Figure 7 This is a schematic diagram of a hydraulic system. The motor and hydraulic pump 200 draw hydraulic oil from the oil pan 230. The hydraulic oil passes through the filter 210, enters the pressure filter and relief valve 320, and then enters the main oil circuit 310. The main oil circuit 310 splits into two paths: an active servo directional valve 240 and a passive servo directional valve 250. To prevent hydraulic shock and buffer pressure, a passive buffer valve 260 and an active buffer valve 290 are installed after the active servo directional valve 240 and the passive servo directional valve 250, respectively. The active conical wheel oil circuit 120 is connected to the active oil circuit sensor 280, and the passive conical wheel oil circuit 130 is connected to the passive oil circuit sensor 270.

[0036] When the PLC receives a shift command, it calculates the target speed by reading the speeds of the active cone wheel speed sensor 140 and the passive cone wheel speed sensor 150. After further calculation, it outputs electrical signals to the active servo directional valve 240 and the passive servo directional valve 250. Upon receiving the command, the servo directional valves open their valve cores to the corresponding degree, pushing the cone wheels of the reduction mechanism to shift gears. The PLC then reads the speeds of the active cone wheel speed sensor 140 and the passive cone wheel speed sensor 150 to determine whether the target has been reached, thus forming a closed-loop PID control to achieve the target output speed.

[0037] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating orientation and positional relationships are based on the orientation and positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0038] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A continuously variable intelligent mechanical speed control device for oilfield equipment that allows for non-stop operation, characterized in that: Used in oilfield equipment, including a drive motor (10), a primary speed-increasing mechanism (20), an active cone pulley, a steel belt (40), a passive cone pulley (50), a secondary speed-regulating mechanism (60), an input shaft (80), an active wheel axle (90), a passive wheel axle (100), and an output shaft (110). The drive motor (10) drives the input shaft (80), which is connected to the first-stage speed-increasing mechanism (20). After speed increase and torque reduction, the power is transmitted to the drive wheel shaft (90). The drive wheel shaft (90) drives the drive cone wheel to rotate. The drive cone wheel and the driven cone wheel (50) are covered with a steel belt (40). The drive cone wheel drives the steel belt (40), thereby transmitting power to the driven cone wheel (50). The driven cone wheel (50) drives the driven wheel shaft (100). The driven wheel shaft (100) is connected to the second-stage speed regulation mechanism (60). After speed regulation by the second-stage speed regulation mechanism (60), the power is transmitted to the output shaft (110).

2. The intelligent mechanical stepless speed regulating device for oilfield equipment without shutting down, as described in claim 1, is characterized in that: The active conical wheel includes an active conical wheel piston cylinder (30) and an active conical wheel piston (31). One side of the active conical wheel piston cylinder (30) is fixedly connected to the active wheel shaft (90). The active conical wheel piston cylinder (30) and the active conical wheel piston (31) form a sealed hydraulic cylinder through a seal. The active conical wheel piston (31) is connected to the active wheel shaft (90) through a spline or a flat key. The active conical wheel piston (31) can move axially along the active wheel shaft (90).

3. The intelligent mechanical stepless speed regulating device for oilfield equipment without shutting down, as described in claim 2, is characterized in that: The sealed hydraulic cylinder is connected to the drive wheel shaft (90) through the drive cone wheel oil hole (33), and then connected to the drive cone wheel oil circuit (120). When shifting gears, the pressure oil enters the sealed hydraulic cylinder formed by the drive cone wheel piston (31) and the drive cone wheel piston cylinder (30) through the drive cone wheel oil circuit (120) and the drive cone wheel oil hole (33), pushing the drive cone wheel piston (31) to press the steel belt (40).

4. The intelligent mechanical stepless speed regulating device for oilfield equipment without shutting down, as described in claim 1, is characterized in that: The passive cone wheel (50) includes a passive cone wheel piston (51) and a passive cone wheel piston cylinder (52). The passive cone wheel piston cylinder (52) and the passive cone wheel piston (51) form a sealed hydraulic cylinder through a seal. The passive cone wheel piston (51) is connected to the passive wheel shaft (100) through a spline or a flat key. The passive cone wheel piston (51) can move axially along the passive wheel shaft (100).

5. The intelligent mechanical stepless speed regulating device for oilfield equipment without shutting down, as described in claim 4, is characterized in that: The sealed hydraulic cylinder is connected to the passive wheel axle (100) through the passive cone wheel oil hole (56), and then connected to the passive cone wheel oil circuit (130). When shifting gears, the pressure oil enters the sealed hydraulic cylinder formed by the passive cone wheel piston (51) and the passive cone wheel piston cylinder (52) through the passive cone wheel oil circuit (130) and the passive cone wheel oil hole (56), pushing the passive cone wheel piston (51) to press the steel belt (40).

6. The intelligent mechanical stepless speed regulating device for oilfield equipment without shutting down, as described in claim 5, is characterized in that: When the hydraulic oil flows out, the passive cone wheel piston (51) retracts, and the steel belt (40) moves radially under the action of the steel belt preload. Under the action of the return spring (55), the passive cone wheel piston (51) maintains the minimum distance between the two cone surfaces.

7. The intelligent mechanical stepless speed regulating device for oilfield equipment without shutting down, as described in claim 1, is characterized in that: The intelligent mechanical stepless speed regulation device for oilfield equipment without shutting down also includes an active cone wheel speed sensor (140) and a passive cone wheel speed sensor (150), which are used to monitor the speed of the active cone wheel and the passive cone wheel (50) respectively.

8. The intelligent mechanical stepless speed regulating device for oilfield equipment without shutting down, as described in claim 1, is characterized in that: The hydraulic valve body module includes a main oil circuit (310), a pressure filter and relief valve (320), a motor and hydraulic pump (200), a suction filter (302), a pressure filter (303), an active servo directional valve (240), and a passive servo directional valve (250). The motor and hydraulic pump (200) builds up hydraulic oil pressure through the suction filter (302), and after passing through the pressure filter (303), it sends the hydraulic oil to the main oil circuit (310). After passing through the pressure relief valve, it is then distributed to the active servo directional valve (240) and the passive servo directional valve (250). After the valve, it is connected to the active cone wheel oil circuit (120) and the passive cone wheel oil circuit (130). When working, the hydraulic valve body module receives the PLC command, and the motor and hydraulic pump (200) work to establish the main oil pressure. After the pressure filter and the relief valve (320) are adjusted, a stable oil pressure is formed. Under the PID control of the PLC, the active servo directional valve (240) and the passive servo directional valve (250) open to the corresponding degree, adjust the oil pressure of the pressure oil and inject it into the active and passive cone wheel cylinders, push the cylinder to move, and complete the gear shifting speed regulation.

9. The intelligent mechanical stepless speed regulating device for oilfield equipment without shutting down, as described in claim 8, is characterized in that: The hydraulic valve body module also includes a passive buffer valve (260), an active buffer valve (290), a passive oil circuit sensor (270), and an active oil circuit sensor (280). The passive buffer valve (260) and the active buffer valve (290) are installed after the active servo directional valve (240) and the passive servo directional valve (250), respectively. The active conical wheel oil circuit (120) is connected to the active oil circuit sensor (280), and the passive conical wheel oil circuit (130) is connected to the passive oil circuit sensor (270).

10. The intelligent mechanical stepless speed regulating device for oilfield equipment without shutting down, as described in claim 9, is characterized in that: When the PLC receives a shift command, it reads the rotational speeds of the active cone wheel speed sensor (140) and the passive cone wheel speed sensor (150), calculates the target rotational speed, and then calculates the electrical signal output to the active servo directional valve (240) and the passive servo directional valve (250). After receiving the command, the servo directional valve opens its valve core to the corresponding degree, pushing the cone wheel of the reduction mechanism to shift gears. The PLC then reads the rotational speeds of the active cone wheel speed sensor (140) and the passive cone wheel speed sensor (150) to determine whether the target has been reached, thus forming a closed-loop PID control to achieve the target output rotational speed.

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