CN209992138U - Rope drives and sways platform simulation experiment device - Google Patents
Rope drives and sways platform simulation experiment device Download PDFInfo
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- CN209992138U CN209992138U CN201920749022.6U CN201920749022U CN209992138U CN 209992138 U CN209992138 U CN 209992138U CN 201920749022 U CN201920749022 U CN 201920749022U CN 209992138 U CN209992138 U CN 209992138U
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Abstract
The utility model discloses a rope-driven swing table simulation experiment device, which comprises a motion platform, a pull rope, a rope driving mechanism, a hydraulic compensation device and a frame; the motion platform is suspended in the rack and connected with a plurality of pull ropes; the hydraulic compensation device is arranged right above the motion platform; the fixed pulleys are fixed on the rack, and the other end of each pull rope penetrates through one fixed pulley to be connected with one group of rope driving mechanisms; the rope driving mechanism is fixed on the rack and used for controlling the retraction of the pull rope, the device can simulate the state of a precision instrument in a ship when the precision instrument greatly swings on the sea indoors, monitors the operation and damage conditions of the precision instrument, is high in efficiency and accurate in precision, and is not influenced by any external weather factors.
Description
Technical Field
The utility model belongs to the technical field of boats and ships and specifically relates to a rope drives rocking platform simulation experiment device.
Background
The ocean field is one of the places that people want to explore most since ancient times, particularly, with the development of Chinese economy, China has more and more marine ships and ocean detection instruments, and compared with other industries, the overwater and underwater industries have high dangers, so that the detection of whether products reach the standard becomes more important. According to the clear regulation of the ship safety inspection rule of the people's republic of China, the ship must be subjected to safety inspection. The traditional detection mode mainly adopts a mode of operating ships and offshore instruments at sea, and whether the ships and the offshore instruments work normally or not is observed within a specified time, so that the related technical standards are met. More unexpected factors can be considered in the detection mode, so that the detection is comprehensive and the actual situation is reflected more. However, the general process of the method is complex, the period is long, the influence factor of weather is large, and in addition, people must operate and control at any time in the detection process to check the working conditions of ships and instruments.
SUMMERY OF THE UTILITY MODEL
The utility model provides a rope drives and sways platform simulation experiment device can be in the indoor simulation boats and ships state when precision instruments sways by a wide margin at sea to monitor its operation and damaged condition, it is efficient, the precision is accurate, does not receive any external weather factor influence.
A rope-driven swing table simulation experiment device comprises a motion platform, a pull rope, a rope driving mechanism, a hydraulic compensation device and a rack; the motion platform is suspended in the rack and connected with a plurality of pull ropes; the hydraulic compensation device is arranged right above the motion platform; the fixed pulleys are fixed on the rack, and the other end of each pull rope penetrates through one fixed pulley to be connected with one group of rope driving mechanisms; the rope driving mechanism is fixed on the rack and used for controlling the retraction of the pull rope.
Preferably, the upper end face and the lower end face of the motion platform are respectively provided with four pull rope connection points, the pull rope connection points on the upper end face and the lower end face are in one-to-one correspondence, the pull rope connection points are symmetrically distributed on the edge of the end face of the motion platform, the rack is provided with fixed pulleys with the same number as the pull rope connection points, and each fixed pulley corresponds to one pull rope connection point.
Preferably, the frame is a frame structure formed by four upright posts and four cross beams, each upright post is provided with two fixed pulleys and is respectively positioned at the upper part and the lower part of the side surface of the upright post, and the pull rope bypasses the fixed pulleys corresponding to the pull rope connecting point connected with the pull rope and is connected with the corresponding rope driving mechanism on the platform at the bottom of the frame.
Preferably, the pull rope connected with the pull rope connection point on the lower end surface of the motion platform passes through the fixed pulley above the stand column of the rack and then is connected with the corresponding rope driving mechanism fixed on the rack; the pull rope connected with the pull rope connection point on the upper end surface of the motion platform penetrates through the fixed pulley below the stand column of the rack and then is connected with the corresponding rope driving mechanism fixed on the rack.
Preferably, the pulley holder of the fixed pulley and the pulley fixing rod are connected by an angular contact ball bearing.
Preferably, the rope driving mechanism comprises a servo motor, a small belt wheel, a large belt wheel, a conveying belt, a guide rod, a winding drum, a fixed block and a screw rod; the small belt wheel is connected with the large belt wheel through a conveying belt, the small belt wheel is installed on a main shaft of a servo motor, the large belt wheel and the fixed block are respectively connected with two ends of a screw rod through bearings, the screw rod is provided with external threads, the winding drum is sleeved on the screw rod and provided with internal threads matched with the external threads of the screw rod for use, the winding drum is provided with through holes matched with guide rods for use, the through holes are uniformly distributed along the outer circumference of the side surface of the winding drum and are arranged in parallel to the screw rod, the guide rods penetrate through the through holes, and two ends of the guide; the servo motor, the large belt wheel and the fixing block are fixed on the stand column of the frame.
Preferably, the winding drum is provided with an external thread with the same pitch as that of the external thread of the screw rod; the pull rope is wound in the thread groove of the winding drum.
Preferably, the hydraulic compensation device comprises a working platform, a hydraulic cylinder, a base platform, a power system and a control system; the base platform is fixed right above the moving platform, the upper end and the lower end of the hydraulic cylinder are respectively hinged with the working platform and the base platform, and hinged points are uniformly distributed on the working platform and the base platform; the power system and the control system are both arranged on the motion platform.
The beneficial effects of the utility model reside in that:
1. the motion state of the ship in six degrees of freedom can be effectively simulated, the simulation degree is high, and the effect is good.
2. The special structure that reel and lead screw are the same pitch among the rope drive arrangement can effectively alleviate the stay cord and receive, put the rocking of in-process, improve motion platform's stability.
3. The hydraulic compensation device is added, so that the deviation of the preset motion track of the motion platform caused by the influence of the elasticity of the pull rope, the temperature and other factors can be effectively compensated, and the precision of the whole device is further improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the rope driving mechanism of the present invention.
Fig. 3 is a schematic view of the hydraulic compensating device of the present invention.
Fig. 4 is the working principle schematic diagram of the hydraulic compensation device of the present invention.
Fig. 5 is an enlarged view of a portion a in fig. 2.
The reference numbers are as follows: 1-motion platform, 2-pull rope, 3-rope driving mechanism, 4-hydraulic compensation device, 5-frame, 501-column, 502-beam, 6-fixed pulley, 601-fixed pulley bracket, 602-fixed pulley fixed link, 7-pull rope connection point, 8-angular contact ball bearing, 9-servo motor, 10-small belt pulley, 11-large belt pulley, 12-conveyor belt, 13-guide rod, 14-winding drum, 15-fixed block, 16-lead screw, 17-thread groove, 18-working platform, 19-hydraulic cylinder, 20-base platform, 21-hinge point, 22-hydraulic pump, 23-electro-hydraulic servo valve, 24-displacement sensor, 25-integral amplifier, 26-given locator, hydraulic servo motor, hydraulic motor, 27-machine vision, 28-digital-to-analog converter and 29-upper computer.
Detailed Description
A rope-driven swing table simulation experiment device comprises a motion platform 1, a pull rope 2, a rope driving mechanism 3, a hydraulic compensation device 4 and a rack 5; the motion platform 1 is suspended in the rack 5 and connected with the pull ropes 2; the hydraulic compensation device 4 is arranged right above the motion platform 1; the fixed pulleys 6 are fixed on the frame 5, and the other end of each pull rope 2 penetrates through one fixed pulley 6 to be connected with one group of rope driving mechanisms 3; the rope driving mechanism 3 is fixed on the frame 2 and used for controlling the retraction of the pull rope 2.
Preferably, the upper end face and the lower end face of the motion platform 1 are respectively provided with four pull rope connection points 7, the pull rope connection points 7 on the upper end face and the lower end face correspond to each other one by one, the pull rope connection points 7 are symmetrically distributed on the edge of the end face of the motion platform 1, the rack 5 is provided with fixed pulleys 6 with the same number as the pull rope connection points 7, and each fixed pulley 6 corresponds to one pull rope connection point 7.
Preferably, the frame 5 is a frame structure formed by four columns 501 and four beams 502, each column 501 is provided with two fixed pulleys 6 and is located at the upper part and the lower part of the side surface of the column 501, and the pull rope 2 goes around the fixed pulley 6 corresponding to the pull rope connection point 7 connected with the pull rope 2 and is connected with the corresponding rope driving mechanism 3 on the platform at the bottom of the frame 5.
Preferably, the pull rope 2 connected with the pull rope connection point 7 on the lower end surface of the motion platform 1 passes through the fixed pulley 6 above the stand column 501 of the rack and is connected with the corresponding rope driving mechanism 3 fixed on the rack 5; the pull rope 2 connected with the pull rope connection point 7 on the upper end surface of the motion platform 1 passes through the fixed pulley 6 below the stand column 501 of the machine frame and is connected with the corresponding rope driving mechanism 3 fixed on the machine frame 5.
Preferably, the pulley bracket 601 of the fixed pulley 6 is connected with the pulley fixing rod 602 through the angular contact ball bearing 8, so that the pulley bracket 601 can freely rotate along the axial direction of the pulley fixing rod 602, thus ensuring the stable rotation of the fixed pulley 6 with two degrees of freedom, reducing the friction resistance of the pull rope 2 in the experiment process, and improving the experiment precision and stability.
Preferably, the rope driving mechanism comprises a servo motor 9, a small belt pulley 10, a large belt pulley 11, a conveying belt 12, a guide rod 13, a winding drum 14, a fixed block 15 and a screw rod 16; the small belt wheel 10 is connected with the large belt wheel 11 through a conveying belt 12, the small belt wheel 10 is installed on a main shaft of a servo motor 9, the large belt wheel 11 and a fixed block 15 are respectively connected with two ends of a screw rod 16 through bearings, the screw rod 16 is provided with external threads, a winding drum 14 is sleeved on the screw rod 16 and is provided with internal threads matched with the external threads of the screw rod 16, the winding drum 14 is provided with through holes matched with a guide rod 13 for use, the through holes are uniformly distributed along the outer circumference of the side surface of the winding drum 14 and are parallel to the screw rod 16, the guide rod 13 penetrates through the through holes, and two ends of the guide rod 13 are respectively; the servo motor 9, the large belt wheel 11 and the fixed block 15 are fixed on the stand column 501 of the frame.
Preferably, the winding drum 14 is provided with an external thread with the same pitch as that of the external thread of the screw rod 16; the pulling rope 2 is wound in the thread groove 17 of the winding drum 14.
Preferably, the hydraulic compensation device 4 comprises a working platform 18, a hydraulic cylinder 19, a base platform 20, a power system and a control system; the base platform 20 is fixed right above the moving platform 18, the upper end and the lower end of the hydraulic cylinder 19 are respectively hinged with the working platform 18 and the base platform 20, and hinged points 21 are uniformly distributed on the working platform 18 and the base platform 20; the power system and the control system are both arranged on the motion platform.
The working principle of the embodiment is as follows:
the controller in this embodiment includes an upper computer 29 and a lower computer, the upper computer 29 writes path programs required for the experiment (i.e., the retraction time and the retraction length of the pull rope 2, which are implemented by controlling the forward and reverse rotation of the output shaft of the servo motor 9, and are in the prior art), and after the upper computer 29 inputs instructions, the lower computer can independently control each servo motor 9 to operate.
The method comprises the steps of fixing a ship precision instrument to be detected above a working platform 18 of a hydraulic compensation device 4, controlling forward rotation and forward rotation of a servo motor 9 according to a preset simulated motion track in an upper computer 29, driving synchronous rotation of a small belt wheel 10, a conveyor belt 12, a large belt wheel 11 and a winding drum 14 by the servo motor 9, converting forward rotation and reverse rotation of the servo motor 9 into rope winding and rope unwinding of a pull rope 2 wound on the winding drum 14, further controlling the motion states of the motion platform 1 and the hydraulic compensation device 4 fixed on the motion platform 1, and realizing six-degree-of-freedom motion of the motion platform 1 through synchronous control of eight groups of rope driving mechanisms 3 on four upright posts 501, so that the purposes of fully simulating the motion states of the ship precision instrument in various ocean environments and monitoring the running condition and the damage condition of the ship precision instrument are achieved.
In order to improve the accuracy of the entire device, the winding drum 14 in the rope drive 3 is provided with an external thread having the same pitch as the lead screw 16, when the small belt wheel 10 drives the large belt wheel 11 to rotate through the conveying belt 12, the guide rod 13 rotates along with the large belt wheel 11 and drives the winding drum 14 to move on the screw rod 16, and the position of the rope 2 at the rope exit point on the spool 14 moves in the opposite direction to the movement of the spool 14, since the pitch of the external thread of the winding drum 14 is the same as that of the external thread of the lead screw 16, the movement distance of the winding drum 14 relative to the lead screw 16 and the rope exit point of the rope 2 relative to the winding drum 14 is the same, since the screw rod 16 is fixed on the stand column 501 of the frame through the large belt pulley 11 and the fixed block 15, the rope outlet point preset by the pull rope 2 can be ensured to be always kept still relative to the frame 5, so that the problem of left-right swinging of the pull rope 2 in the motion process can be eliminated, and the accuracy of the whole device is improved.
Because the pull rope 2 is influenced by factors such as elasticity and temperature change of the pull rope, the moving platform 1 often cannot accurately reach the preset position, and in order to eliminate the error and further improve the accuracy of the whole device, a hydraulic compensation device 4 is arranged on the moving platform 1, and the power system of the hydraulic compensation device 4 is a hydraulic pump 22; the control system of the hydraulic compensation device 4 comprises an electro-hydraulic servo valve 23, a displacement sensor 24, an integral amplifier 25, a given potentiometer 26, a machine vision 27 and a digital-to-analog converter 28, the rope driving mechanism 3 controls the motion of the motion platform 1 according to a motion path preset by an upper computer 29, when the rope driving mechanism 1 completes a state instruction, the machine vision 27 acquires the actual motion position of the motion platform 1 and transmits the acquired actual motion position to the upper computer 29 to be compared with the instruction preset by the upper computer 29, the upper computer 29 converts a digital signal reflected by the compared error into a voltage signal through the digital-to-analog converter 28 and transmits the voltage signal to the hydraulic compensation device 4, the digital-to-analog converter 28 converts the displacement signal of the hydraulic cylinder 19 into a voltage signal, compares the two voltage signals, and after the difference value of the two voltage signals passes through the integral amplifier 25, the electric current is input to the electro-hydraulic servo valve 23, and the electro-hydraulic servo valve 23 automatically adjusts the opening amount and the moving direction according to the input electric current, so as to control the displacement and the direction of the hydraulic cylinder 19 and accurately move the monitored precise instrument of the ship to the preset position. When the moving platform 1 stops returning to the home position, the initial position of the hydraulic cylinder 19 is restored by the given potentiometer 26.
It should be noted that, in the present embodiment, the model number of the servo motor is 180 ST-M19015.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a rope drives and sways platform simulation experiment device which characterized in that: comprises a motion platform, a pull rope, a rope driving mechanism, a hydraulic compensation device and a frame; the motion platform is suspended in the rack and connected with a plurality of pull ropes; the hydraulic compensation device is arranged right above the motion platform; the fixed pulleys are fixed on the rack, and the other end of each pull rope penetrates through one fixed pulley to be connected with one group of rope driving mechanisms; the rope driving mechanism is fixed on the rack and used for controlling the retraction of the pull rope.
2. The rope-driven swing table simulation experiment device of claim 1, wherein: the upper end face and the lower end face of the motion platform are respectively provided with four stay cord connection points, the stay cord connection points of the upper end face and the lower end face are in one-to-one correspondence, the stay cord connection points are symmetrically distributed on the edge of the end face of the motion platform, the rack is provided with fixed pulleys with the same number as the stay cord connection points, and each fixed pulley corresponds to one stay cord connection point.
3. The rope-driven swing table simulation experiment device of claim 1, wherein: the frame is a frame structure formed by four upright posts and four cross beams, each upright post is provided with two fixed pulleys and is respectively positioned at the upper part and the lower part of the side surface of the upright post, and the pull rope bypasses the fixed pulleys corresponding to the pull rope connecting point connected with the pull rope and is connected with a corresponding rope driving mechanism on a platform at the bottom of the frame.
4. The rope-driven swing table simulation experiment device of claim 3, wherein: a pull rope connected with a pull rope connection point on the lower end surface of the motion platform penetrates through a fixed pulley above the stand column of the rack and is connected with a corresponding rope driving mechanism fixed on the rack; the pull rope connected with the pull rope connection point on the upper end surface of the motion platform penetrates through the fixed pulley below the stand column of the rack and then is connected with the corresponding rope driving mechanism fixed on the rack.
5. The rope-driven swing table simulation experiment device according to claim 1 or 3, wherein: and the pulley bracket of the fixed pulley is connected with the pulley fixing rod through an angular contact ball bearing.
6. The rope-driven swing table simulation experiment device of claim 1, wherein: the rope driving mechanism comprises a servo motor, a small belt wheel, a large belt wheel, a conveying belt, a guide rod, a winding drum, a fixed block and a screw rod; the small belt wheel is connected with the large belt wheel through a conveying belt, the small belt wheel is installed on a main shaft of a servo motor, the large belt wheel and the fixed block are respectively connected with two ends of a screw rod through bearings, the screw rod is provided with external threads, the winding drum is sleeved on the screw rod and provided with internal threads matched with the external threads of the screw rod for use, the winding drum is provided with through holes matched with guide rods for use, the through holes are uniformly distributed along the outer circumference of the side surface of the winding drum and are arranged in parallel to the screw rod, the guide rods penetrate through the through holes, and two ends of the guide; the servo motor, the large belt wheel and the fixing block are fixed on the stand column of the frame.
7. The rope-driven swing table simulation experiment device of claim 6, wherein: the winding drum is provided with an external thread with the same pitch as the external thread of the screw rod, and the pull rope is wound in the thread groove of the winding drum.
8. The rope-driven swing table simulation experiment device of claim 1, wherein: the hydraulic compensation device comprises a working platform, a hydraulic cylinder, a base platform, a power system and a control system; the base platform is fixed right above the moving platform, the upper end and the lower end of the hydraulic cylinder are respectively hinged with the working platform and the base platform, and hinged points are uniformly distributed on the working platform and the base platform; the power system and the control system are both arranged on the motion platform.
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| CN201920749022.6U CN209992138U (en) | 2019-05-23 | 2019-05-23 | Rope drives and sways platform simulation experiment device |
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| CN201920749022.6U CN209992138U (en) | 2019-05-23 | 2019-05-23 | Rope drives and sways platform simulation experiment device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186633A (en) * | 2019-05-23 | 2019-08-30 | 武汉誉琼科技有限公司 | A kind of rope drives significantly tilter imitative experimental appliance |
| CN117804944A (en) * | 2024-02-29 | 2024-04-02 | 南通瑞力健身器材科技有限公司 | Plastic rope skipping fatigue life testing arrangement |
-
2019
- 2019-05-23 CN CN201920749022.6U patent/CN209992138U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186633A (en) * | 2019-05-23 | 2019-08-30 | 武汉誉琼科技有限公司 | A kind of rope drives significantly tilter imitative experimental appliance |
| CN117804944A (en) * | 2024-02-29 | 2024-04-02 | 南通瑞力健身器材科技有限公司 | Plastic rope skipping fatigue life testing arrangement |
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