WO2023077736A1 - Energy storage type water turbine motion simulation experiment device and control method therefor - Google Patents

Abstract

An energy storage type water turbine motion simulation experiment device and a control method therefor. The simulation experiment device comprises: a water turbine (1), a swaying motion platform for driving the water turbine (1) to perform swaying motion experiment, and a surging motion platform for driving the swaying motion platform to move. The water turbine (1) is located below the swaying motion platform and the surging motion platform; the swaying motion platform comprises a swaying energy storage device (78); the surging motion platform comprises a surging energy storage device (79); the swaying and surging energy storage devices (78, 79) each are provided with a guide rod (47, 71), an energy storage slide block (44, 72), and a spring (48, 70); the energy storage slide block (44, 72) slides on the guide rod (47, 71); the spring (48, 70) surrounds the outer side of the guide rod (47, 71); and the energy storage slide block (44, 72) is connected to the water turbine (1)/the motion platform. According to the simulation experiment device, when the water turbine performs swaying or surging motion, the spring can store or provide energy, thereby effectively reducing a peak value of a driving force in swaying/surging motion.

Description

An energy storage turbine motion simulation experiment device and its control method technical field

The invention relates to a water turbine experiment device, in particular to an energy storage type water turbine motion simulation experiment device and a control method thereof.

Background technique

Due to the increasingly prominent global shortage of resources, environmental pollution and other issues, countries around the world are trying to find new energy sources to replace traditional fossil energy sources. Among the various new energy sources that can replace traditional fossil energy sources, tidal current energy is The advantages of stability and predictability make it one of the most potential new energy sources. Therefore, the rational use and development of tidal current energy is of great significance for improving the global resource crisis and environmental pollution.

The tidal current energy turbine is an important energy conversion device in the field of tidal current energy development and utilization. Tidal energy turbines are divided into horizontal axis tidal energy turbines and vertical axis tidal energy turbines according to the parallel and vertical direction of the impeller rotation axis and water flow velocity direction. According to the different forms of supporting carriers, the tidal current energy generation devices can be divided into bottom type, pile type and floating type. The piled and bottom-mounted tidal energy turbines are installed on the seabed, and the installation and maintenance costs are high; while the floating tidal energy turbines are installed on the water surface, with high flow velocity on the water surface, high extractable energy, and low installation and maintenance costs. Floating tidal energy turbines have received extensive attention. When the water turbine converts tidal energy and electric energy, it will be affected by ocean currents and waves. Therefore, by fixing the water turbine on the carrier motion simulation platform to simulate the movement of the water turbine in the tidal current, and then study how to better realize the relationship between tidal energy and electric energy. Conversion has been receiving a lot of attention.

In the prior art, for example, patent CN105134472A discloses an experimental device for mooring mobile tidal current power generation. In this patent, an experimental device for mooring with load-bearing cables can achieve the effect of amplifying the flow velocity of the tidal current; however, the platform in this experimental device It is in a fixed state, and it is difficult to simulate the surge and sway movement of the turbine carrier caused by the interference of ocean currents. Another example is patent CN202010842014.3 which discloses an experimental device for floating horizontal axis water turbines. This patent designs a water turbine experimental platform to simulate high-frequency disturbances such as waves and turbulent flow when the water turbine is driven by tidal currents. However, this The amplitude radius of the experimental device is fixed, so it is difficult to simulate sway and surge motions with various amplitudes. The guide rails used are all single-sided guide rails, which are prone to uneven force, and the peak value of the driving force required by the experimental device is also relatively large.

Contents of the invention

Purpose of the invention: In view of the above shortcomings, the present invention provides an energy storage turbine motion simulation experiment device that reduces the peak driving force required for the carrier motion platform.

The present invention also provides a control method of the above-mentioned experimental device.

Technical solution: In order to solve the above problems, the present invention adopts an energy storage type water turbine motion simulation experiment device, including a water turbine, a surge motion platform, and a sway motion platform that drives the water turbine sway motion experiment. The movement of the sway motion platform drives the surge motion of the water turbine, the water turbine is located under the sway motion platform and the surge motion platform, the sway motion platform includes a sway energy storage device, and the sway energy storage device includes several An energy storage unit, the sway energy storage unit includes a sway guide rod, a sway energy storage slider, and a sway spring; the sway guide rod is arranged on the sway motion platform, and the extension direction of the sway guide rod is parallel to The sway movement direction of the water turbine, the sway energy storage slider slides on the sway guide rod, the sway spring is sleeved on the sway guide rod, and one end of the sway spring is fixedly connected to the sway motion platform, and the other end is connected to the The sway energy storage slider is fixedly connected, and the sway energy storage slider is connected to the water turbine and moves laterally together with the water turbine; the surge motion platform includes a surge energy storage device; the surge energy storage device includes several surge energy storage units , the surge energy storage unit includes a surge guide rod, a surge energy storage slider, and a surge spring; the surge guide rod is arranged on a surge motion platform, and the extension direction of the surge guide rod is parallel to the surge of the turbine In the direction of movement, the surge energy storage slider slides on the surge guide rod, the surge spring is sleeved on the surge guide rod, and one end of the surge spring is connected to the surge motion platform, and the other end is connected to the surge energy storage The slide block is fixedly connected, the surge energy storage slide block is connected with the sway motion platform and moves longitudinally together with the sway motion platform; the extension direction of the sway guide rod is perpendicular to the extension direction of the surge guide rod.

Further, the surge energy storage device includes an adjustment device, and the adjustment device includes an adjustment screw, an adjustment motor, a nut slider, and several starting point sliders. The adjustment motor is fixed on the surge motion platform, and the adjustment motor drives The adjusting screw rod rotates, and a nut slider is arranged on the adjusting screw rod, and the nut slider is threadedly connected with the adjusting screw rod, and the rotation of the adjusting screw rod drives the nut slider to translate along the extending direction of the adjusting screw rod, and each of the surge guide rods A starting point slider is set, the starting point slider slides along the surge guide rod, all the starting point sliders are fixedly connected to the nut slider, one end of the surge spring is connected to the surge energy storage slider, and the other end is connected to the starting point slider And connect with the Surge Motion Platform.

Further, the sway motion platform further includes a first sway frame, a second sway frame, and a sway drive device, the water turbine is fixedly connected to the first sway frame, and several first sway frames are arranged in the second sway frame a slide rail, on which the first swing frame is installed, and the swing driving device is used to drive the first swing frame to slide on the first slide rail; the swing guide rod and the second swing The frame is fixedly connected, and the extension direction of the sway guide rod is parallel to the extension direction of the first slide rail.

Further, the sway drive device includes a sway drive motor, a sway drive screw, a sway drive slider, a sway screw slider, and a first screw motor, and the first sway frame is provided with a A sway driving slide rail with a vertical sliding direction, a sway driving slider is installed on the sway driving slide rail, the sway driving slider is connected to one end of a sway driving screw rod, and a sway screw rod is arranged on the sway driving screw rod Slider, the sway screw rod slider is threadedly connected with the sway drive screw rod, the first screw rod motor drives the sway drive screw rod to rotate, and the sway drive screw rod rotates to drive the sway screw rod slider to drive along the sway The screw moves, the output shaft of the sway drive motor is fixedly connected to the slider of the sway screw rod, the extension direction of the output shaft of the sway drive motor is perpendicular to the extension direction of the sway drive screw rod, and the sway drive motor drives the sway drive The screw mandrel is oscillated, and the sway driving screw rod oscillates to drive the sway drive slider to slide on the sway drive slide rail, thereby driving the sway first frame to slide on the first slide rail.

Further, the sway energy storage unit includes a sway energy storage switching device, the sway energy storage switching device includes a first electromagnet telescopic rod and a second electromagnet telescopic rod, and the first electromagnet telescopic rod is fixed end is fixed on the second frame of the sway, the fixed end of the second electromagnet telescopic rod is fixed on the first frame of the sway, the sway energy storage slider is provided with a first connection hole and a second connection hole, the first electromagnet When the telescopic rod is powered on, the output end of the first electromagnet telescopic rod is connected to the first connection hole of the sway energy storage slider; when the second electromagnet telescopic rod is powered on, the output end of the second electromagnet telescopic rod is connected to the sway storage The second connecting hole of the slider can be connected; the first electromagnet telescopic rod and the second electromagnet telescopic rod are not powered on at the same time.

Further, the surge motion platform further includes a surge frame and a surge drive device, a plurality of second slide rails are arranged in the surge frame, the second swing frame is installed on the second slide rails, and the surge drive The device is used to drive the second swing frame to slide on the second slide rail; the surge guide rod is fixedly connected with the surge frame, and the extension direction of the surge guide rod is parallel to the extension direction of the second slide rail.

Further, the surge drive device includes a surge drive motor, a surge drive screw, a surge drive slider, a surge screw slider, and a second screw motor. A surge drive slide rail with a vertical sliding direction, a surge drive slider is installed on the surge drive slide rail, the surge drive slider is connected to one end of the surge drive screw rod, and the surge drive screw rod is provided with a surge drive screw rod Slider, the surge screw rod slider is threadedly connected with the surge drive screw rod, the second screw rod motor drives the surge drive screw rod to rotate, and the surge drive screw rod rotates to drive the surge screw rod slider along the surge drive The screw moves, the output shaft of the surge drive motor is fixedly connected to the slider of the surge drive motor, the extension direction of the output shaft of the surge drive motor is perpendicular to the extension direction of the surge drive screw rod, and the surge drive motor drives the surge drive The screw rod swings, and the surge driving screw rod swings to drive the surge driving slider to slide on the surge driving slide rail, thereby driving the second swing frame to slide on the second slide rail.

Further, the surge energy storage unit includes a surge energy storage switching device, the surge energy storage switching device includes a third electromagnet telescopic rod and a fourth electromagnet telescopic rod, and the third electromagnet telescopic rod is fixed end is fixed on the surge frame, the fixed end of the fourth electromagnet telescopic rod is fixed on the second frame of the sway, the surge energy storage slider is provided with a third connection hole and a fourth connection hole, and the third electromagnet telescopic rod When energized, the output end of the third electromagnet telescopic rod is connected to the third connection hole of the surge energy storage slider; when the fourth electromagnet telescopic rod is energized, the output end of the fourth electromagnet telescopic rod is connected to the surge energy storage slider The fourth connecting hole of the block is connected; the third electromagnet telescopic rod and the fourth electromagnet telescopic rod are not energized at the same time.

Further, the water turbine includes a blade, a main shaft and a fixed cabin, and a torque meter and a generator are arranged in the fixed cabin; the blade is fixedly connected to one end of the torque meter through the main shaft, and the other end of the torque meter is fixedly connected to the input shaft of the generator .

The present invention also adopts a control method of an energy storage type hydraulic turbine motion simulation experiment device, comprising the following steps:

(1) Determine the rotational speed w ₁ of the sway drive motor according to the experimental requirements;

(2) Determine the total elastic coefficient k ₁ of the sway energy storage device, k ₁ = m ₁ w ₁ ² ;

(3) Select part or all of the second electromagnet telescopic rod to energize, so that the elastic coefficient of the swaying energy storage device is k ₁ ;

(4) Determine the rotational speed w ₂ of the surge drive motor according to the experimental requirements;

(5) Determine the total elastic coefficient k ₂ of the surge energy storage device, k ₂ =m ₂ w ₂ ² ;

(6) Select part or all of the fourth electromagnet telescopic rod to energize, so that the elastic coefficient of the surge energy storage device is k ₂ ;

(7) The motion simulation experiment device of the energy storage type hydraulic turbine performs uniform linear motion during the experiment, and determines the operating speed B according to the experimental requirements;

(8) Determine the moving distance D of the starting slider relative to the initial position according to the running speed B, and the calculation formula is Bc+Dk ₂ =0;

(9) Use the energy storage turbine motion simulation experiment device to conduct the sway and surge experiments of the turbine under the experimental conditions of the sway drive motor speed w ₁ , the surge drive motor speed w ₂ , and the operating speed B.

Beneficial effects: Compared with the prior art, the present invention has the remarkable advantage that when the water turbine sways or surges, the sway spring or the surge spring is stretched and compressed to store energy; when the water turbine returns, the stored energy It can provide power. Using the spring as an energy storage element can effectively reduce the peak value of the driving force during the sway or surge movement. And by choosing different springs, different elastic coefficients can be constructed, so as to be suitable for oscillating motions of different frequencies.

Description of drawings

Fig. 1 shows the schematic diagram of the overall structure of the experimental device of the present invention;

Fig. 2 shows the overall schematic diagram of removing the frame outer baffle of the device of the present invention;

Shown in Fig. 3 is the sectional view of water turbine among the present invention;

Fig. 4 shows that impeller structure schematic diagram among the present invention;

Fig. 5 shows the front view of the connection between the sway motion platform and the water turbine of the present invention;

Figure 6 is a side view of the sway motion platform of the present invention;

Fig. 7 is a sectional view of A-A in Fig. 5, that is, a schematic structural diagram of a sway energy storage unit;

Fig. 8 shows the front view of the surge motion platform in the present invention;

Figure 9 shows a sectional view of B-B in Figure 8;

Figure 10 is a schematic structural view of a surge energy storage device in the present invention;

Fig. 11 shows a schematic diagram of the mechanism movement of the sway motion platform of the present invention without a mechanical energy storage device;

Fig. 12 shows a schematic diagram of the mechanism movement of the sway motion platform with a mechanical energy storage device of the present invention;

Figure 13 is a schematic diagram of the mechanism movement of the surge motion platform without a mechanical energy storage device of the present invention;

Fig. 14 shows a schematic diagram of the mechanism movement of the surge motion platform with a mechanical energy storage device of the present invention;

Fig. 15 shows the control flow diagram of the experimental device in the present invention.

Detailed ways

Example 1

As shown in FIG. 1 and FIG. 2 , an energy storage turbine motion simulation experiment device in this embodiment includes a hydraulic turbine 1 , a sway motion platform, and a surge motion platform. As shown in Figures 5 and 6, the sway motion platform includes a first sway frame 28, a second sway frame 29, a sway driving device, and a sway energy storage device. The water turbine 1 communicates with the first sway frame through a column 27 28 is fixedly connected, and the water turbine 1 moves with the movement of the first sway frame 28; the first slide rail 32 is horizontally arranged on the upper and lower sides of the second sway frame 29, and double rails 32 are arranged on the upper and lower sides in this embodiment. The first sliding rail 32, the first sliding block 33 is arranged up and down on the outside of the first swaying frame 28, the first swaying frame 28 is installed on the first sliding rail 32 through the first sliding block 33, and the swaying driving device drives the swaying The first frame 28 slides on the first slide rail 32, and the first frame 28 is provided with a swing drive slide rail 42 perpendicular to its sliding direction, and the swing drive slide rail 42 is vertically arranged and located in the horizontal direction of the first slide rail 32 In the middle position, the sway drive slider 41 is installed on the sway drive slide rail 42 .

The sway driving device includes a sway drive motor 31, a sway drive screw 37, a sway drive slider 41, a sway screw slider 35, and a first screw motor 36; the sway drive slider 41 and the sway drive One end of the screw rod 37 is connected through the first staggered roller bearing 39, the sway drive slider 41 is fixedly connected with the inner ring of the first staggered roller bearing 39 through the first bearing fixing seat 40, and the sway drive screw 37 is fixed through the first staggered roller bearing 39. The platform 38 is fixedly connected to the outer ring of the first staggered roller bearing 39 , and the sway driving screw 37 and the sway driving slider 41 swing relative to each other. The swing plane of the sway drive screw 37 is parallel to the sway drive slide rail 42 and the first slide rail 32, the sway drive screw 37 is threadedly connected to the sway screw slider 35, and the first screw motor 36 drives the sway drive The screw rod 37 rotates around the extension direction, and the rotation of the sway driving screw rod 37 drives the sway screw rod slider 35 to move along the sway driving screw rod 37 . A first motor bracket 30 is provided on the side of the second swing frame 29 parallel to the extension direction of the first slide rail 32, and the swing drive motor 31 is installed on the first motor bracket 30, and the output shaft of the swing drive motor 31 is located on the first In the middle position of the slide rail 32 in the horizontal direction, the output shaft of the sway drive motor 31 is fixedly connected to the sway screw rod slider 35 through the first coupling flange 34, and the extension direction of the output shaft of the sway drive motor 31 is perpendicular to the sway drive In the extending direction of the screw rod 37, the sway drive motor 31 drives the sway drive screw rod 37 to oscillate periodically, and the sway drive screw rod 37 periodically oscillates to drive the sway drive slider 41 to reciprocate on the sway drive slide rail 42, thereby The first sway frame 28 is driven to reciprocate laterally on the first slide rail 32 to realize a sway movement experiment simulating that the water turbine 1 is affected by the lateral water flow.

The sway energy storage device includes several sway energy storage units 78. In this embodiment, four sway energy storage units 78 are arranged vertically. As shown in FIG. 7, the sway energy storage units 78 include sway guide Rod 47, sway energy storage slide block 44, sway spring 48, sway energy storage switching device; both ends of sway guide rod 47 are fixed on the second sway frame 29 through first fixture 46, and sway guide The extension direction of the rod 47 is parallel to the first slide rail 32, the sway energy storage slider 44 slides on the sway guide rod 47, and the sway energy storage slider 44 is provided with a first connection hole and a second connection hole, the sway energy storage slider 44 is provided with a first connection hole and a second connection hole, The spring 48 surrounds the outside of the sway guide rod 47 , one end of the sway spring 48 is fixedly connected to the second sway frame 29 , and the other end is fixedly connected to the sway energy storage slider 44 .

The sway energy storage switching device includes a first electromagnet telescopic rod 43 and a second electromagnet telescopic rod 45, the fixed end of the first electromagnet telescopic rod 43 is fixedly connected to the outside of the second sway frame 29, and the second sway frame 29 is set There is a hole through which the output end of the first electromagnet telescopic rod 43 passes. After the first electromagnet telescopic rod 43 is energized, the output end passes through the hole on the swing second frame 29 and penetrates into the first connection hole. The iron telescopic rod 45 is powered off, and the swaying energy storage slide block 44 is fixed on the swaying second frame 29 . The fixed end of the second electromagnet telescopic rod 45 is fixedly connected to the inner side of the first frame 28 of the sway, and the first frame 28 of the sway is provided with a hole for the output end of the second electromagnet telescopic rod 45 to pass through. The second electromagnet telescopic rod 45 After electrification, the output end passes through the hole on the first swing frame 28 and penetrates into the second connection hole. At this time, the first electromagnet telescopic rod 43 is powered off, and the swing energy storage slider 44 is fixedly connected to the first swing frame 28. , through the power on and off of the first electromagnet telescopic rod 43 and the second electromagnet telescopic rod 45, switch the connection between the first sway frame 28 and the sway energy storage unit 78, thereby selectively accessing the sway Energy storage unit 78 for experiments.

As shown in Figure 8, the surge motion platform includes a surge frame 49, a surge drive device, and a surge energy storage device; a second slide rail 53 is horizontally arranged on the upper and lower sides of the surge frame 49, and in this embodiment Double second slide rails 53 are arranged on the upper and lower sides, and second sliders 52 are arranged up and down on the outside of the second swing frame 29, and the second swing frame 29 is installed on the second slide rails 53 through the second slide blocks 52. The surge driving device drives the second swing frame 29 to slide on the second slide rail 53. The swing frame 49 is provided with a surge drive slide rail 67 perpendicular to its sliding direction. The surge drive slide rail 67 is vertically arranged and located on the second In the middle position of the slide rail 53 in the horizontal direction, a surge drive slider 66 is installed on the surge drive slide rail 67 . The sway and surge frames are connected by double-sided guide rails, and the force is balanced.

The surge driving device comprises a surge drive motor 58, a surge drive screw mandrel 62, a surge drive slider 66, a surge screw screw slider 60, a second screw motor 61; the surge drive slider 66 and the surge drive One end of the screw rod 62 is connected through the second staggered roller bearing 64, the surge drive slider 66 is fixedly connected with the inner ring of the second staggered roller bearing 64 through the second bearing holder 65, and the surge drive screw rod 62 is fixed through the second The platform 63 is fixedly connected with the outer ring of the second interlaced roller bearing 64 , and the surge driving screw 62 and the surge driving slider 66 swing relative to each other. The swing plane of the surge drive screw 62 is parallel to the surge drive slide rail 67 and the second slide rail 53, the surge drive screw 62 is threaded to connect the surge screw slider 60, and the second screw motor 61 drives the surge drive The screw rod 62 rotates around the extension direction, and the rotation of the surge drive screw rod 62 drives the surge screw rod slider 60 to move along the surge drive screw rod 62 . A second motor bracket 57 is provided on the side of the swing frame 49 parallel to the extension direction of the second slide rail 53, and the swing drive motor 58 is mounted on the second motor bracket 57, and the output shaft of the swing drive motor 58 is located on the second slide rail. 53 at the middle position in the horizontal direction, the output shaft of the surge drive motor 58 is fixedly connected to the slide block 60 of the surge drive motor 58 through the second coupling flange 59, and the extension direction of the output shaft of the surge drive motor 58 is perpendicular to the surge drive screw rod 62 in the extension direction, the surge drive motor 58 drives the surge drive screw 62 to periodically swing, and the surge drive screw 62 periodically swings to drive the surge drive slider 66 to reciprocate on the surge drive slide rail 67, thereby driving the horizontal The swing second frame 29 reciprocates laterally on the second slide rail 53 to realize a surge movement experiment simulating that the water turbine 1 is affected by the longitudinal water flow.

The surge energy storage device includes several surge energy storage units 79 and adjustment devices. In this embodiment, four surge energy storage units 79 are arranged vertically. As shown in FIG. 9 , the surge energy storage units 79 include The surge guide rod 71, the surge energy storage slider 72, the surge spring 70, and the surge energy storage switching device; both ends of the surge guide rod 71 are fixed on the second surge frame 29 through the first fixing member 46, and The extension direction of the surge guide rod 71 is parallel to the second slide rail 53, the surge energy storage slider 72 slides on the surge guide rod 71, and the surge energy storage slider 72 is provided with a third connection hole and a fourth connection hole , the surge spring 70 surrounds the outside of the surge guide rod 71 , one end of the surge spring 70 is fixedly connected to the starting point slider 69 , and the other end is fixedly connected to the surge energy storage slider 72 .

The surge energy storage switching device includes a third electromagnet telescopic rod 54 and a fourth electromagnet telescopic rod 55, the fixed end of the third electromagnet telescopic rod 54 is fixedly connected to the outside of the surge frame 49, and the surge frame 49 is provided with a third The hole through which the output end of the electromagnet telescopic rod 54 passes. After the third electromagnet telescopic rod 54 is energized, the output end passes through the hole on the surge frame 49 and penetrates into the third connection hole. At this time, the fourth electromagnet telescopic rod 55 is powered off , the surge energy storage slider 72 is fixed on the surge frame 49 . The fixed end of the fourth electromagnet telescopic rod 55 is fixedly connected to the inner side of the swing second frame 29, and the swing second frame 29 is provided with a hole for the output end of the fourth electromagnet telescopic rod 55 to pass through. The fourth electromagnet telescopic rod 55 After electrification, the output end passes through the hole on the second swing frame 29 and penetrates into the fourth connection hole. At this time, the third electromagnet telescopic rod 54 is powered off, and the swing energy storage slider 72 is fixedly connected to the second swing frame 29. , through the power on and off of the third electromagnet telescopic rod 54 and the fourth electromagnet telescopic rod 55, switch the connection between the second frame 29 of the sway and the energy storage unit 79 of the sway, thereby selectively accessing the sway Energy storage unit 79 for experiments.

As shown in Figure 10, the adjustment device includes an adjustment screw 77, an adjustment motor 75, a nut slider 73, and several starting point sliders 69. Each surge guide rod 71 is provided with a starting point slider 69, and the starting point slider 69 moves along the direction of the surge. The guide rod 71 slides. In this embodiment, the four surge energy storage units 79 are correspondingly provided with four starting point sliders 69, and the nut sliders 73 are fixedly connected with each starting point slider 69 through the cross bar 74 in sequence. The nut sliders 73 It is threadedly connected with the adjusting screw rod 77, and the adjusting screw rod 77 is driven by the adjusting motor 75 to rotate with the extension direction as the axis. The rotation of the adjusting screw rod 77 drives the nut slider 73 to move along the extending direction of the adjusting screw rod 77. On the swing frame 49, the adjusting device is provided with an encoder 50 and a proximity switch 51 to control the operation of the adjusting motor. The movement of the nut slider 73 is driven by the rotation of the ball screw module, and the movement of the overall starting point slider 69 is driven by the movement of the nut slider 73, which is used to adjust the initial position of the surge spring 70, effectively reducing the peak value of the driving force in the surge movement .

Both the sway motion platform and the surge motion platform are driven by a sinusoidal mechanism, which converts the rotation of the motor into the linear motion of the sway frame and the sway frame. The motor is at the center of the motion, and the motor rotates at a constant speed to drive the sway frame to achieve Sinusoidal oscillation, simple control algorithm. If the distance between the screw slider and the driving slider can be adjusted, the oscillation radius of the motion platform can be changed to realize the motion of simulating various amplitudes. When the energy storage slider is in the middle position, the spring keeps the original length. When the energy storage slider moves to both ends, the spring is stretched and compressed to store energy; when the energy storage slider returns, the stored energy can provide power. Using the spring as an energy storage element can effectively reduce the peak value of the driving force during the lateral/surge motion. The connection and disconnection of the energy storage slider and the sway frame are realized through the characteristics of the electromagnet telescopic rod being pushed out when it is powered on and retracted when the power is off, so as to realize the connection and disconnection between the swaying frame and the spring. By choosing different springs, different elastic coefficients can be constructed, so as to be suitable for different frequencies of oscillating motion.

As shown in Figure 5, the water turbine 1 is fixed on the lower end of the column 27, and is located below the sway motion platform and the surge motion platform. The water turbine includes blades 4, a bearing system and a fixed cabin. The impellers 3 are fixedly connected by bolts, as shown in Figure 4, the center of the impeller 3 is processed with a spline groove, and the periphery of the spline groove is processed with threaded holes, and the spline fixing plate 8 is connected to the threaded holes around the spline groove by screws. Bolt fixing holes are processed on all four sides of the impeller, which is convenient for selecting paddles 4 with different numbers and different hydrodynamic parameters for experiments, and increases the scope of application of the experimental device. One end of the main shaft 5 is processed with a spline, and the spline on the main shaft 5 matches the spline groove on the impeller 3. The main shaft 5 and the impeller 3 are connected by a spline fixing plate 8, and the other end of the main shaft 5 is connected with the torque meter 18. The main shaft 5 The main shaft sleeve 12 is arranged outside, the first bearing 9 is arranged between the main shaft 5 and the main shaft sleeve 12, the first bearing 9 is used to support the main shaft 5, and the main shaft sleeve 12 and the main shaft 5 are provided with a shaft for fixing the first bearing 9 Shoulder, the outer side of the first bearing 9 is limited by the second snap ring 13. A plurality of grooves are arranged in the middle of the main shaft 5, and the first jumper 10 is put into the grooves, and an oil seal 11 is set between two adjacent jumper rings 10 to form a main shaft seal.

A main shaft housing 11 is arranged outside the main shaft sleeve 12, and a front end cover 6 is arranged between the main shaft housing 11 and the impeller 3, and the main shaft sleeve 12 and the front end cover 6 are fixedly connected by bolts. One end of the main shaft sleeve 12 is connected with the front end cover 6, and the other end is connected with the torque meter cabin 14, and the torque meter 18 is located in the torque meter cabin 14; Connected to the wheel hub 17 by a key, a second bearing 16 is arranged between the wheel hub 17 and the torque meter cabin 14, a shaft shoulder is processed on the outside of the wheel hub 17 for placing a pair of second bearings 16, and a groove is processed in the torque meter cabin 14 , for placing a pair of third snap rings 15, and for limiting the outside of the second bearing 16. Torque meter 18 utilizes bolt to be fixed on the torque meter seat 19, and torque meter seat 19 is fixed on the generator compartment 22 by screw mandrel 20, and generator 23 is arranged in generator compartment 22, and generator 23 output shafts pass through first coupling 21 and The other end of the torque meter 18 is connected, the generator 23 is limited and fixed by bolts 24 , and the other end of the generator 23 is provided with a rear end cover 25 . All between the main shaft sleeve 12 and the front end cover 6, the main shaft compartment 11 and the front end cover 6, the main shaft compartment 11 and the torque meter compartment 14, the torque meter compartment 14 and the generator compartment 22, the generator compartment 22 and the rear end cover 25 are connected by bolts and The sealing ring 26 performs sealing. The main body of the turbine uses segmented cylinders as the cabin body, and sealing ring flanges are used between the segmented cylinders for static sealing, which is stable and reliable. Moreover, the use of segmented cylinders facilitates the installation of various large parts and ensures the accuracy and reliability of the installation of each part.

The experimental process of the experimental device is as follows: the experimental device is fixed on the crane, the water turbine 1 is located below the water surface as a whole, the sway test platform and the surge test platform are located above the water surface, the truck drives the experimental device to move forward, the water flow impacts the paddle 4, and the paddle The blades of the leaves 4 rotate, the blades drive the main shaft 5 to rotate, the main shaft 5 drives the torque meter 18 to rotate, and the torque meter 18 drives the engine 23 to rotate, so that the tidal current energy is converted into electric energy through the generator. The sway motion platform drives the first sway frame 28 to reciprocate laterally and the second sway frame 29 to reciprocate longitudinally through the motor, thereby driving the water turbine to perform high-frequency, precise sway and surge motions, thereby simulating that the water turbine is driven by the tidal flow High-frequency interference such as waves and turbulence in the process.

Example 2

A control method of the energy storage turbine motion simulation experiment device in the above embodiment, comprising the following steps:

(1) Determine the rotational speed w ₁ of the sway drive motor and the working length A ₁ of the first rocker arm (that is, the distance between the sway screw rod slider 35 and the sway drive slider 41 along the extension direction of the sway drive screw rod 37 according to the experimental requirements _A1 );

(2) Determine the total elastic coefficient k ₁ of the sway energy storage device, k ₁ = m ₁ w ₁ ² ;

(3) According to the spring parallel formula k ₁ =a ₁ k ₁ ′+a ₂ k ₂ ′+a ₃ k ₃ ′+a ₄ k ₄ ′+......+a _n k _n ′, select part or All the second electromagnet telescopic rods are energized, where a ₁ , a ₂ , a ₃ , a ₄ ...... a _n ∈ {0, 1}, when the sway energy storage slider of the sway energy storage unit When 44 is connected to the first frame 28 of sway through the second electromagnet telescopic rod, the corresponding a=1; When the frame 28 is disconnected, corresponding a=0, the total elastic coefficient of the sway energy storage device is k ₁ ;

(4) Determine the rotational speed w ₂ of the surge drive motor, the working length A ₂ of the second rocker arm (the distance A between the surge screw rod slider 60 and the surge drive slider 66 along the extension direction of the surge drive screw rod 62 ) according to the experimental requirements ₂ );

(5) Determine the total elastic coefficient k ₂ of the surge energy storage device, k ₂ =m ₂ w ₂ ² ;

(6) According to the spring parallel formula k ₂ =a ₁ k ₁ ′+a ₂ k ₂ ′+a ₃ k ₃ ′+a ₄ k ₄ ′+......+a _n k _n ′, select part or All fourth electromagnet telescopic rods are energized, where a ₁ , a ₂ , a ₃ , a ₄ ...... a _n ∈ {0, 1}, when the surge energy storage slider of the surge energy storage unit When 72 is connected to the second frame 29 of sway through the fourth electromagnet telescopic rod 55, the corresponding a=1; When the second frame 29 is disconnected, corresponding to a=0, the elastic coefficient of the surge energy storage device is k ₂ ;

(7) The motion simulation experiment device of the energy storage type hydraulic turbine performs uniform linear motion during the experiment, and determines the operating speed B according to the experimental requirements;

(8) Determine the moving distance D of the starting slider relative to the initial position according to the operating speed B, and the calculation formula is Bc+Dk ₂ =0; the required

(9) Use the energy storage turbine motion simulation experiment device to conduct the sway and surge experiments of the turbine under the experimental conditions of the sway drive motor speed w ₁ , the surge drive motor speed w ₂ , and the operating speed B, and collect and store the experimental data data.

During the experiment, when the sway motion platform is not connected to the sway energy storage device, as shown in Figure 11, with the sway drive motor 31 as the coordinate origin of the Cartesian coordinate system, when the speed of the sway drive motor 31 is _w1 , Then the X-axis position of the sway drive slider 41 is x ₁ =A ₁ sinw ₁ t, the speed is x ₁ ′=A ₁ w ₁ cosw ₁ t, and the acceleration is x ₁ ″=-A ₁ w ₁ ² sinw ₁ t ; The Y-axis position of the sway drive slider 41 is y ₁ =A ₁ cosw ₁ t, the speed is y ₁ ′=-A ₁ w ₁ sinw ₁ t, and the acceleration is y ₁ ″=-A ₁ w ₁ ² cosw ₁ t , the force on the sway motion platform is F ₁ =m ₁ x ₁ ″+x ₁ ′c, and as shown in the figure F ₁ =F ₁ ′. Among them, c is the drag coefficient, and m ₁ is the overall mass of the sway motion platform. The driving force of the sway driving motor 31:

in,

when

When the sway motion platform is not connected with the sway energy storage device, the theoretical driving force is the largest, which is

When the sway motion platform is connected to the sway energy storage device, as shown in Figure 12, the sway drive motor 31 is taken as the coordinate origin of the Cartesian coordinate system, and when the rotation speed of the sway drive motor 31 is _w1 , the sway drive slider The X-axis position of 41 is x ₁ =A ₁ sinw ₁ t, the velocity is x ₁ ′=A ₁ w ₁ cosw ₁ t, the acceleration is x ₁ ″=-A ₁ w ₁ ² sinw ₁ t; the sway drives the slider The Y-axis position of 41 is y ₁ =A ₁ cosw ₁ t, the velocity is y ₁ ′=-A ₁ w ₁ sinw ₁ t, the acceleration is y ₁ ″=-A ₁ w ₁ ² cosw ₁ t, and the swaying motion platform The force is F ₁ =m ₁ x″+x′c+k ₁ x F ₁ =F ₁ ′. Among them, c is the drag coefficient, and m ₁ is the overall mass of the sway motion platform. The drive of the sway drive motor 31 is obtained force:

in,

when

When the sway motion platform is connected to the sway energy storage device, the theoretical driving force is the largest, which is

When k ₁ = m ₁ w ₁ ² , the peak driving force of the sway motion platform when it is connected to the sway energy storage device is cA ₁ ² w ₁ is less than the maximum driving force when the sway motion platform is not connected to the sway energy storage device force

When the surge motion platform is not connected to the surge energy storage device, as shown in Figure 13, the surge drive motor 58 is taken as the coordinate origin, and when the swing drive motor 58 rotates at a speed of _w2 , then the surge drive slider 66 The position of the X axis is x ₂ =A ₂ sinw ₂ t, since the device moves forward at the speed B along the Z axis, the actual speed of the surge drive slider 66 is the speed of the second frame 29 of the sway plus the running speed of the device is x ₂ ′=A ₂ w ₂ cosw ₂ t+B, the acceleration is x ₂ ″=-A ₂ w ₂ ² sinw ₂ t; the Y-axis position of the surge drive slider 66 is y ₂ =A ₂ cosw ₂ t, and the speed is y ₂ ′＝-A ₂ w ₂ sinw ₂ t, the acceleration is y ₂ ″＝-A ₂ w ₂ ² cosw ₂ t, the force on the surge motion platform is F ₂ ＝m ₂ x ₂ ″+x ₂ ′c F ₂ = F ₂ ′. Wherein, m ₂ is the overall mass of the surge motion platform. Obtain the driving force of the surge drive motor 58:

in,

when

When the surge motion platform is not connected with the surge energy storage device, the theoretical driving force is the largest, which is

When the surge motion platform is connected to the surge energy storage device, as shown in Figure 14, with the surge drive motor 58 as the origin of coordinates, when the speed of the surge drive motor 58 is w ₂ and the initial displacement D of the starting point slider 69 is given , then the X-axis position of the surge driving slider 66 is x ₂ =A ₂ sinw ₂ t+D, since the device moves forward at the speed B along the Z axis, the actual speed of the surge driving slider 66 is sway second The speed of the frame 29 plus the operating speed of the device is x ₂ ′=A ₂ w ₂ cosw ₂ t+B, and the acceleration is x ₂ ″=-A ₂ w ₂ ² sinw ₂ t; the Y-axis position of the surge drive slider 66 is y ₂ =A ₂ cosw ₂ t, the velocity is y ₂ ′=-A ₂ w ₂ sinw ₂ t, the acceleration is y ₂ ″=-A ₂ w ₂ ² cosw ₂ t, the force on the surge platform is F ₂ = m ₂ x ₂ ″+x ₂ ′c+k ₂ x ₂ F ₂ =F ₂ ′. Among them, c is the drag coefficient, and m ₂ is the overall mass of the surge motion platform. The driving force of the surge drive motor 58 is obtained as:

in,

when

When the surge motion platform is connected to the surge energy storage device, the theoretical driving force is the largest, which is

When k ₂ =m ₂ w ₂ ² and Bc+Dk ₂ =0, the peak driving force of the surge motion platform connected to the surge energy storage device is cA ₂ ² w ₂ less than that of the surge motion platform without the surge energy storage device peak driving force when the device is connected

Claims (10)

1. An energy storage type water turbine motion simulation experiment device, comprising a water turbine (1), a surge motion platform, and a sway motion platform that drives the water turbine (1) for sway motion experiments, and the surge motion platform drives the sway motion platform to move so that Drive the water turbine (1) for a surge motion experiment, the water turbine (1) is located under the sway motion platform and the surge motion platform, it is characterized in that the sway motion platform includes a sway energy storage device, and the sway motion The energy device includes several sway energy storage units (78), and the sway energy storage unit (78) includes a sway guide rod (47), a sway energy storage slider (44), and a sway spring (48); The sway guide rod (47) is arranged on the sway motion platform, and the extension direction of the sway guide rod (47) is parallel to the sway motion direction of the water turbine (1), and the sway energy storage slider (44) is Sliding on the sway guide rod (47), the sway spring (48) is sleeved on the sway guide rod (47), and one end of the sway spring (48) is fixedly connected to the sway motion platform, and the other end is connected to the sway energy storage The slider (44) is fixedly connected, and the sway energy storage slider (44) is connected with the water turbine (1) to move laterally together with the water turbine (1); the surge motion platform includes a surge energy storage device; The device includes several surge energy storage units (79), and the surge energy storage units (79) include a surge guide rod (71), a surge energy storage slider (72), and a surge spring (70); The surge guide rod (71) is arranged on the surge motion platform, and the extension direction of the surge guide rod (71) is parallel to the direction of the surge movement of the water turbine (1), and the surge energy storage slider (72) Slide on the rod (71), the surge spring (70) is sleeved on the surge guide rod (71), and one end of the surge spring (70) is connected with the surge motion platform, and the other end is connected with the surge energy storage slider ( 72) Fixed connection, the surge energy storage slider (72) is connected with the sway motion platform and moves longitudinally together with the sway motion platform; the extension direction of the sway guide rod (47) is perpendicular to the surge guide rod (71) Extension direction.
2. The energy storage turbine motion simulation experiment device according to claim 1, characterized in that, the surge energy storage device includes an adjustment device, and the adjustment device includes an adjustment screw (77), an adjustment motor (75), a nut Slider (73), a plurality of starting point sliders (69), the adjustment motor (75) is fixedly arranged on the surge motion platform, the adjustment motor (75) drives the adjustment screw rod (77) to rotate, and the adjustment screw rod (77) A nut slider (73) is provided, and the nut slider (73) is threadedly connected with the adjusting screw rod (77), and the rotation of the adjusting screw rod (77) drives the nut slider (73) to translate along the extension direction of the adjusting screw rod (77) , each of the surge guide rods (71) is provided with a starting point slider (69), and the starting point slider (69) slides along the surge guide rod (71), and all starting point sliders (69) and nut sliders (73) Fixedly connected, one end of the surge spring (70) is connected to the surge energy storage slider (72), and the other end is connected to the surge motion platform by connecting the starting point slider (69).
3. The energy storage turbine motion simulation experiment device according to claim 1, characterized in that, the sway motion platform also includes a sway first frame (28), a sway second frame (29), a sway driving device , the water turbine (1) is fixedly connected to the first sway frame (28), a number of first slide rails (32) are arranged in the second sway frame (29), and the first sway frame (28) is installed on the second sway frame (29). On a slide rail (32), the sway driving device is used to drive the first sway frame (28) to slide on the first slide rail (32); the sway guide rod (47) and the second sway frame The frame (29) is fixedly connected, and the extension direction of the sway guide rod (47) is parallel to the extension direction of the first slide rail (32).
4. The energy storage turbine motion simulation experiment device according to claim 3, wherein the sway driving device comprises a sway drive motor (31), a sway drive screw (37), a sway drive slider ( 41), the swaying screw slider (35), the first screw motor (36), the swaying first frame (28) is provided with a swaying driving slide rail (42) perpendicular to its sliding direction, and the swaying A sway drive slider (41) is installed on the drive slide rail (42), and the sway drive slider (41) is connected to one end of the sway drive screw rod (37), and the sway drive screw rod (37) is provided with a The swing screw slider (35), the swing screw slider (35) is threadedly connected to the swing drive screw (37), and the first screw motor (36) drives the swing drive screw (37) to rotate , the swaying drive screw (37) rotates to drive the swaying screw slider (35) to move along the swaying drive screw (37), and the output shaft of the swaying drive motor (31) is connected to the swaying screw slider ( 35) Fixed connection, the extension direction of the output shaft of the sway drive motor (31) is perpendicular to the extension direction of the sway drive screw rod (37), and the sway drive motor (31) drives the sway drive screw rod (37) to swing, and the sway drive screw rod (37) is driven to swing. The sway driving screw (37) oscillates to drive the sway drive slider (41) to slide on the sway drive slide rail (42), thereby driving the first sway frame (28) to slide on the first slide rail (32).
5. The motion simulation experiment device of energy storage type hydraulic turbine according to claim 4, characterized in that, the sway energy storage unit (78) includes a sway energy storage switching device, and the sway energy storage switching device includes a first electromagnetic Iron telescopic rod (43) and the second electromagnet telescopic rod (45), the fixed end of the first electromagnet telescopic rod (43) is fixed on the swing second frame (29), the second electromagnet telescopic rod (45) The fixed end is fixed to the first sway frame (28). The sway energy storage slider (44) is provided with a first connection hole and a second connection hole. When the first electromagnet telescopic rod (43) is energized, the second The output end of an electromagnet telescopic rod (43) is connected with the first connection hole of the swaying energy storage slider (44); when the second electromagnet telescopic rod (45) is energized, the second electromagnet telescopic rod (45) The output end is connected with the second connection hole of the swaying energy storage slider (44); the first electromagnet telescopic rod (43) and the second electromagnet telescopic rod (45) are not energized at the same time.
6. The energy storage turbine motion simulation experiment device according to claim 5, characterized in that, the surge motion platform also includes a surge frame (49), a surge drive device, and several The second slide rail (53), the swing second frame (29) is installed on the second slide rail (53), and the swing drive device is used to drive the swing second frame (29) on the second slide rail ( 53) sliding upward; the surge guide rod (71) is fixedly connected to the surge frame (49), and the extension direction of the surge guide rod (71) is parallel to the extension direction of the second slide rail (53).
7. The energy storage type hydraulic turbine motion simulation experiment device according to claim 6, wherein the surge drive device comprises a surge drive motor (58), a surge drive screw (62), a surge drive slider ( 66), the swing screw slider (60), the second screw motor (61), the swing driving slide rail (67) perpendicular to the sliding direction is set on the second swing frame (29), the swing A surge drive slider (66) is installed on the drive slide rail (67), and the surge drive slider (66) is connected to one end of the surge drive screw rod (62), and the surge drive screw rod (62) is provided with a longitudinal The swing screw slider (60), the surge screw slider (60) is threadedly connected to the surge drive screw (62), and the second screw motor (61) drives the surge drive screw (62) to rotate , the surge drive screw (62) rotates to drive the surge screw slider (60) to move along the surge drive screw (62), and the output shaft of the surge drive motor (58) is connected to the surge screw slider ( 60) Fixed connection, the extension direction of the output shaft of the surge drive motor (58) is perpendicular to the extension direction of the surge drive screw rod (62), and the surge drive motor (58) drives the swing drive screw rod (62) to swing, The swing driving screw (62) oscillates to drive the surge drive slider (66) to slide on the surge drive slide rail (67), thereby driving the swing second frame (29) to slide on the second slide rail (53).
8. The motion simulation experiment device of energy storage type hydraulic turbine according to claim 7, characterized in that, the surge energy storage unit (79) includes a surge energy storage switching device, and the surge energy storage switching device includes a third electromagnetic Iron telescopic rod (54) and the fourth electromagnet telescopic rod (55), the fixed end of the third electromagnet telescopic rod (54) is fixed on the surge frame (49), and the fixed end of the fourth electromagnet telescopic rod (55) Fixed to the second swing frame (29), the swing energy storage slider (72) is provided with a third connection hole and a fourth connection hole, when the third electromagnet telescopic rod (54) is energized, the third electromagnetic The output end of the iron telescopic rod (54) is connected with the third connection hole of the surge energy storage slider (72); when the fourth electromagnet telescopic rod (55) is energized, the output end of the fourth electromagnet It is connected with the fourth connecting hole of the surge energy storage slider (72); the third electromagnet telescopic rod (54) and the fourth electromagnet telescopic rod (55) are not energized at the same time.
9. The energy storage turbine motion simulation experiment device according to claim 8, characterized in that, the water turbine (1) comprises blades (4), a main shaft (5) and a fixed cabin, and a torque meter is arranged in the fixed cabin (18) and generator (23); blade (4) is fixedly connected with one end of torque meter (18) by main shaft (5), and the other end of torque meter (18) is fixedly connected with generator 23 input shafts.
10. A control method of an energy storage turbine motion simulation experiment device as claimed in claim 8 or 9, characterized in that it comprises the following steps:

    S1: Determine the rotational speed w ₁ of the sway drive motor (31) according to the experimental requirements;

    S2: Determine the total elastic coefficient k ₁ of the sway energy storage device, k ₁ = m ₁ w ₁ ² , where m ₁ is the overall mass of the sway motion platform;

    S3: Select part or all of the second electromagnet telescopic rods (45) to energize, so that the elastic coefficient of the swaying energy storage device is k ₁ ;

    S4: Determine the rotational speed w ₂ of the surge drive motor (58) according to the experimental requirements;

    S5: Determine the total elastic coefficient k ₂ of the surge energy storage device, k ₂ =m ₂ w ₂ ² , where m ₂ is the overall mass of the surge motion platform;

    S6: Select part or all of the fourth electromagnet telescopic rod (55) to energize, so that the elastic coefficient of the surge energy storage device is k ₂ ;

    S7: The energy storage turbine motion simulation experiment device performs uniform linear motion during the experiment, and determines the operating speed B according to the experimental requirements;

    S8: Determine the moving distance D of the starting point slider (69) relative to the initial position according to the operating speed B, the calculation formula is Bc+Dk ₂ =0, where c is the drag coefficient;

    S9: Use the energy storage turbine motion simulation experiment device to conduct the sway and longitudinal of the water turbine (1) under the experimental conditions of the sway drive motor (31) speed w ₁ , the surge drive motor (58) speed w ₂ , and the operating speed B. swing experiment.

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