Double-variable motor type energy recovery experiment device platform for heave compensation winch

Abstract

The utility model discloses a double variable displacement motor type energy recovery experiment device platform of a heave compensation winch, which belongs to the technical field of ocean engineering equipment and comprises a double variable displacement hydraulic motor type energy recovery mechanism. The double-variable hydraulic motor type energy recovery mechanism comprises a left variable hydraulic motor, a left elastic coupling, a middle connecting shaft, a right elastic coupling, a right variable hydraulic motor, an energy accumulator and an oil tank. The heave compensation experiment platform has the advantages of being large in voltage transformation range, high in energy recovery efficiency and high in response speed, and energy can flow from a low-pressure position to a high-pressure position. The device is wide in application, is used for researching the control and performance influence factors of the energy recovery mechanism of the heave compensation hydraulic winch based on the double-variable motor, can also be used for verifying the control strategy and algorithm of the energy recovery mechanism, and can also be used for researching the influence factors of the dynamic and static characteristics and the recovery reuse efficiency of the energy recovery mechanism.

Description

Technical Field

[0001] This utility model relates to the field of marine engineering equipment technology, specifically to an experimental platform for heave compensation winch energy recovery. Background Technology

[0002] Heave-compensating winches are crucial equipment for ensuring the safe operation of many offshore floating operations (ultra-deep drilling, floating hoisting, etc.) without being affected by waves. Compared to electric winches, hydraulic winches have advantages such as smaller size, more compact structure, and higher reliability. Heavy-duty heave-compensating hydraulic winches consume a lot of power; therefore, employing energy recovery technology is one of the effective measures to improve their efficiency and reduce power consumption.

[0003] Combining hydraulic transformers with accumulators can efficiently recover hydraulic pressure energy. Hydraulic transformers can be divided into two categories: traditional and the Innas novel hydraulic transformer. Researchers have been working to improve the performance and reduce the size of novel hydraulic transformers for practical engineering applications. However, to date, novel hydraulic transformers still suffer from drawbacks such as small voltage range, high heat generation, high noise, low flow rate, and low power, and their performance is far from meeting the requirements of practical engineering applications. Traditional hydraulic transformers mainly consist of two coaxially connected variable displacement motors, offering a large voltage range, high recovery efficiency, fast response speed, and good reliability. To accelerate the technological maturity of heave-compensated winch energy recovery, it is necessary to build an experimental platform for heave-compensated winch dual-variable displacement motor energy recovery based on traditional hydraulic transformers, and to study its design and control, obtaining its design theory, control algorithm, and performance influencing factors. Utility Model Content

[0004] The purpose of this invention is to provide a heave-compensated winch dual-variable motor type energy recovery experimental device platform with wide application, large voltage range, and high energy recovery efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A heave-compensating winch dual-variable motor type energy recovery experimental device platform includes a dual-variable hydraulic motor type energy recovery mechanism. The mechanism comprises a left variable hydraulic motor, a left flexible coupling, a middle connecting shaft, a right flexible coupling, a right variable hydraulic motor, an accumulator, and an oil tank. The left end of the middle connecting shaft is connected to the output shaft of the left variable hydraulic motor via the left flexible coupling, and the right end of the middle connecting shaft is connected to the output shaft of the right variable hydraulic motor via the right flexible coupling. The right variable hydraulic motor is connected in series on a right energy transmission oil pipeline. One end of the right energy transmission oil pipeline is connected to the oil tank, and the other end is connected to the accumulator. The left variable hydraulic motor is connected in series on the left energy transmission oil pipeline.

[0007] Furthermore, one end of the left energy transmission oil pipeline is connected to the oil tank, and the other end is connected to the fixed-displacement hydraulic motor. The fixed-displacement hydraulic motor is connected to the shaft of the winch drum through a reducer, and the cable on the winch drum is connected to the mass block.

[0008] Furthermore, an auxiliary power output oil pipeline is connected to connection point A on the wall of the left energy transmission oil pipeline. The auxiliary power output oil pipeline is connected to an auxiliary power output pump, which is driven by a servo motor.

[0009] Furthermore, a check valve is connected to the auxiliary power output oil pipeline.

[0010] Furthermore, it also includes a control system, which includes a controller, a displacement sensor, an encoder, and a torque-tachometer. The displacement sensor is used to transmit the displacement information of the mass block to the controller. The encoder is used to transmit the rotational speed of the winch drum to the controller. The torque-tachometer is used to detect the rotational speed and torque of the intermediate connecting shaft and transmit the rotational speed and torque information to the controller. The controller adjusts and controls the rotational speed of the servo motor and the displacement of the left and right variable hydraulic motors.

[0011] Furthermore, the control system also includes a first bidirectional flow sensor and a second bidirectional flow sensor. The first bidirectional flow sensor and the second bidirectional flow sensor are respectively installed on both sides of the left energy transmission oil pipeline at connection point A. The first bidirectional flow sensor and the second bidirectional flow sensor are used to detect the oil flow information of the fixed displacement hydraulic motor and the left variable displacement hydraulic motor, and transmit the oil flow information to the controller.

[0012] Furthermore, the control system also includes pressure sensor A and pressure sensor B, which are used to detect the oil pressure at the hydraulic motor oil port and the right accumulator oil port, respectively, and transmit the oil pressure information to the controller.

[0013] Furthermore, the section of the left energy transmission oil pipeline located between connection point A and the fixed displacement hydraulic motor is connected to a first relief valve and a first pressure gauge.

[0014] Furthermore, the section of the right energy transmission oil pipeline located between the right variable hydraulic motor and the accumulator is connected to a second relief valve and a second pressure gauge.

[0015] The beneficial effects of this utility model are as follows:

[0016] The heave compensation experimental platform of this application adopts a dual-variable hydraulic motor type energy recovery mechanism, which is a combination of a dual-variable hydraulic motor type hydraulic transformer and an accumulator. It has the characteristics of large voltage transformation range, high energy recovery efficiency and fast response speed, and can realize the flow of energy from low pressure to high pressure. The system has good reliability, so it is highly feasible to use it as an energy recovery mechanism for heave compensation winches.

[0017] This application has a wide range of applications. It can be used to study the control and performance influencing factors of an energy recovery mechanism based on a dual-variable motor heave-compensated hydraulic winch. It can also be used to verify the control strategy and algorithm of the energy recovery mechanism, and to study the influencing factors of its dynamic and static characteristics and recovery and reuse efficiency. Attached Figure Description

[0018] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort:

[0019] Figure 1 This is a structural principle block diagram of the present invention;

[0020] Figure 2 for Figure 1 The diagram shows the structure of a dual-variable hydraulic motor type energy recovery mechanism.

[0021] In the diagram: 1. Dual-variable hydraulic motor type energy recovery mechanism; 2. Left variable hydraulic motor; 3. Left flexible coupling; 4. Middle connecting shaft; 5. Right flexible coupling; 6. Right variable hydraulic motor; 7. Accumulator; 8. Oil tank; 9. Left energy transmission oil pipeline; 10. Fixed displacement hydraulic motor; 11. Reducer; 12. Winch drum; 13. Cable; 14. Mass block; 15. Connection point A; 16. Auxiliary power output oil pipeline; 17. Auxiliary power output pump; 18. 19. Servo motor; 20. Check valve; 21. Controller; 22. Displacement sensor; 23. Encoder; 24. Torque tachometer; 25. First bidirectional flow sensor; 26. Second bidirectional flow sensor; 27. Pressure sensor A; 28. Pressure sensor B; 29. ​​First relief valve; 30. First pressure gauge; 31. Second relief valve; 32. Second pressure gauge; 33. Right energy transmission oil pipeline; 34. Bracket; 35. Worktable; 36. Long mounting hole. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper surface", "lower surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "forward", "reverse", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0024] like Figure 1 , 2 As shown, a heave compensation winch dual-variable motor type energy recovery experimental device platform includes a dual-variable hydraulic motor type energy recovery mechanism 1. The dual-variable hydraulic motor type energy recovery mechanism 1 includes a left variable hydraulic motor 2, a left flexible coupling 3, an intermediate connecting shaft 4, a right flexible coupling 5, a right variable hydraulic motor 6, an accumulator 7, and an oil tank 8. The left end of the intermediate connecting shaft 4 is connected to the output shaft of the left variable hydraulic motor 2 through the left flexible coupling 3, and the right end of the intermediate connecting shaft 4 is connected to the output shaft of the right variable hydraulic motor 6 through the right flexible coupling 5. The right variable hydraulic motor 6 is connected in series on the right energy transmission oil pipeline 32. One end of the right energy transmission oil pipeline 32 is connected to the oil tank 8, and the other end is connected to the accumulator 7. The left variable hydraulic motor 2 is connected in series on the left energy transmission oil pipeline 9.

[0025] One end of the left energy transmission oil pipeline 9 is connected to the oil tank 8, and the other end is connected to the fixed-displacement hydraulic motor 10. The fixed-displacement hydraulic motor 10 is connected to the shaft of the winch drum 12 through the reducer 11. The cable 13 on the winch drum 12 is connected to the mass block 14.

[0026] An auxiliary power output oil line 16 is connected at connection point A15 on the wall of the left energy transmission oil line 9. The auxiliary power output oil line 16 is connected to an auxiliary power output pump 17, which is driven by a servo motor 18. A one-way valve 19 is connected to the auxiliary power output oil line 16.

[0027] A heave compensation experimental platform for a winch dual-variable hydraulic motor type energy mechanism further includes a control system. The control system includes a controller 20, a displacement sensor 21, an encoder 22, and a torque-tachometer 23. The displacement sensor 21 is used to transmit the displacement information of the mass block 14 to the controller 20. The encoder 22 is used to transmit the rotational speed of the winch drum 12 to the controller 20. The torque-tachometer 23 is used to detect the rotational speed and torque of the intermediate connecting shaft 4 and transmit the rotational speed and torque information to the controller 20. The controller 20 adjusts and controls the rotational speed of the servo motor 18 and the displacement of the left variable hydraulic motor 2 and the right variable hydraulic motor 6.

[0028] The control system further includes a first bidirectional flow sensor 24 and a second bidirectional flow sensor 25. The first bidirectional flow sensor 24 and the second bidirectional flow sensor 25 are respectively provided on both sides of the left energy transmission oil pipeline 9 and located at the connection point A15. The first bidirectional flow sensor 24 and the second bidirectional flow sensor 25 are used to detect the oil flow information of the fixed displacement hydraulic motor 10 and the left variable displacement hydraulic motor 2, and transmit the oil flow information to the controller 20.

[0029] The control system also includes pressure sensor A26 and pressure sensor B27, which are used to detect the oil pressure at the oil port of the quantitative hydraulic motor 10 and the oil pressure at the oil port of the right accumulator 7, respectively, and transmit the oil pressure information to the controller 20.

[0030] The left energy transmission oil pipeline 9, and the pipeline section located between connection point A15 and the fixed displacement hydraulic motor 10, is connected to a first relief valve 28 and a first pressure gauge 29.

[0031] The right energy transmission oil pipeline 32, and the pipeline section located between the right variable hydraulic motor 6 and the accumulator 7, is connected to a second relief valve 30 and a second pressure gauge 31.

[0032] The accumulator 7 is mounted on the bracket 33, which is fixed to the elongated mounting hole 35 on the workbench 34 by bolts.

[0033] Working principle: When the fixed-displacement hydraulic motor 10 drives the winch drum 12 to rotate forward through the reducer 11, the cable 13 on the winch drum 12 winds back, and the mass block 14 rises. When the fixed-displacement hydraulic motor 10 rotates in reverse, the winch drum 12 rotates in reverse, the cable 13 unwinds, and the mass block 14 descends. When the mass block descends, the servo motor 18 stops, i.e., ns=0. Under the gravity of the mass block 14, the winch drum 12 drives the fixed-displacement hydraulic motor 10 to rotate in reverse. The fixed-displacement hydraulic motor 10 operates in pump mode, and hydraulic oil enters the dual-variable hydraulic motor type energy recovery mechanism 1 to start energy recovery. During the energy recovery process, the left variable hydraulic motor 2 operates in motor mode to drive the right variable hydraulic motor 6 to rotate, making the right variable hydraulic motor 6 operate in hydraulic pump mode. Hydraulic oil enters the accumulator 7 to realize energy recovery. As energy recovery proceeds, the pressure in the accumulator will continuously increase, and recovery will become difficult. At this time, reducing the displacement V2 of the right variable hydraulic motor 6 and increasing the displacement V1 of the left variable hydraulic motor 2 can ensure that energy recovery continues. During energy storage, when the pressure in the accumulator 7 exceeds the set pressure of the second relief valve 30, the second relief valve 30 opens to overflow, achieving a safety protection function. When it is necessary to raise the mass block, the displacement of the right variable hydraulic motor 6 is increased, and the displacement of the left variable hydraulic motor 2 is decreased. Under the action of the pressurized oil in the accumulator, the right variable hydraulic motor 6 operates in motor mode to drive the left variable hydraulic motor 2 to rotate, making the left variable hydraulic motor 2 operate in pump mode. The dual variable hydraulic motor type energy recovery mechanism 1 outputs hydraulic oil; the output hydraulic oil drives the fixed displacement hydraulic motor 10, which drives the drum to rotate forward, so that the mass block 7 rises, realizing the release of recovered energy. As energy release proceeds, the pressure in the accumulator will become lower and lower; at this time, the displacement V2 of the right variable hydraulic motor 6 is increased and the displacement V1 of the left variable hydraulic motor 2 is decreased to continue releasing energy, but the released energy becomes smaller and smaller, that is, the output hydraulic oil flow rate becomes smaller and smaller. When the flow rate output of the dual-variable hydraulic motor type energy recovery mechanism 1 is insufficient, causing the mass block to rise slower than the expected speed, the servo motor 18 starts, driving the auxiliary power output pump 17 to output hydraulic oil. The auxiliary power output pump 17 and the dual-variable hydraulic motor type energy recovery mechanism 1 together supply oil to the constant-pressure hydraulic motor 10, ensuring the mass block's rising speed meets the requirements. The lower the oil pressure in the accumulator, the smaller the output flow rate, and the faster the servo motor will be. When the pressure in the accumulator is too low, the output flow rate is very small. At this time, the auxiliary power output pump 17 supplies oil independently. The first relief valve 28 acts as a safety valve, limiting the maximum working pressure.

[0034] Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those different embodiments or examples, without contradiction. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A heave-compensating winch dual-variable motor type energy recovery experimental device platform, characterized in that: The device includes a dual-variable hydraulic motor type energy recovery mechanism, comprising a left variable hydraulic motor, a left flexible coupling, an intermediate connecting shaft, a right flexible coupling, a right variable hydraulic motor, an accumulator, and an oil tank. The left end of the intermediate connecting shaft is connected to the output shaft of the left variable hydraulic motor via the left flexible coupling, and the right end of the intermediate connecting shaft is connected to the output shaft of the right variable hydraulic motor via the right flexible coupling. The right variable hydraulic motor is connected in series on the right energy transmission oil pipeline, one end of which is connected to the oil tank, and the other end is connected to the accumulator. The left variable hydraulic motor is connected in series on the left energy transmission oil pipeline.

2. The heave compensation winch bivariate motor type energy recovery test device platform according to claim 1, characterized in that: One end of the left energy transmission oil pipeline is connected to the oil tank, and the other end is connected to the fixed-displacement hydraulic motor. The fixed-displacement hydraulic motor is connected to the shaft of the winch drum through a reducer, and the cable on the winch drum is connected to the mass block.

3. The heave compensating winch bivariate motor type energy recovery test device platform according to claim 2, characterized in that: An auxiliary power output oil pipeline is connected to connection point A on the wall of the left energy transmission oil pipeline. The auxiliary power output oil pipeline is connected to an auxiliary power output pump, which is driven by a servo motor.

4. The heave compensating winch bivariate motor type energy recovery test device platform according to claim 3, characterized in that: A one-way valve is connected to the auxiliary power output oil pipeline.

5. The heave compensation winch bivariate motor type energy recovery test device platform according to claim 4, characterized in that: It also includes a control system, which includes a controller, a displacement sensor, an encoder, and a torque-tachometer. The displacement sensor is used to transmit the displacement information of the mass block to the controller. The encoder is used to transmit the rotational speed of the winch drum to the controller. The torque-tachometer is used to detect the rotational speed and torque of the intermediate connecting shaft and transmit the rotational speed and torque information to the controller. The controller adjusts and controls the rotational speed of the servo motor and the displacement of the left and right variable hydraulic motors.

6. The heave compensating winch bivariate motor type energy recovery test device platform according to claim 5, characterized in that: The control system further includes a first bidirectional flow sensor and a second bidirectional flow sensor. The first bidirectional flow sensor and the second bidirectional flow sensor are respectively installed on both sides of the left energy transmission oil pipeline at connection point A. The first bidirectional flow sensor and the second bidirectional flow sensor are used to detect the oil flow information of the fixed displacement hydraulic motor and the left variable displacement hydraulic motor, and transmit the oil flow information to the controller.

7. The heave compensating winch bivariate motor type energy recovery test device platform according to claim 5, characterized in that: The control system also includes pressure sensor A and pressure sensor B, which are used to detect the oil pressure at the hydraulic motor oil port and the right accumulator oil port, respectively, and transmit the oil pressure information to the controller.

8. The heave compensating winch bivariate motor type energy reclamation test device platform according to claim 3, characterized in that: The left energy transmission oil pipeline, specifically the section between connection point A and the fixed-displacement hydraulic motor, is connected to a first relief valve and a first pressure gauge.

9. The heave compensation winch bivariate motor type energy recovery test device platform according to claim 1, characterized in that: The right energy transmission oil pipeline, and the section of the pipeline located between the right variable hydraulic motor and the accumulator, is connected to a second relief valve and a second pressure gauge.

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