CN110616701B - Method and device for adjusting clearance of thread pair of safety mechanism of gear rack climbing type ship lift - Google Patents
Method and device for adjusting clearance of thread pair of safety mechanism of gear rack climbing type ship lift Download PDFInfo
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- CN110616701B CN110616701B CN201910563665.6A CN201910563665A CN110616701B CN 110616701 B CN110616701 B CN 110616701B CN 201910563665 A CN201910563665 A CN 201910563665A CN 110616701 B CN110616701 B CN 110616701B
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- bevel gear
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02C—SHIP-LIFTING DEVICES OR MECHANISMS
- E02C5/00—Mechanisms for lifting ships vertically
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Gear Transmission (AREA)
Abstract
The invention relates to a method and a device for adjusting the clearance of a thread pair of a safety mechanism of a gear rack climbing ship lift, wherein a closed-loop control system with detection and adjustment is designed for detecting and adjusting the clearance of the thread pair of the safety mechanism; the control system starts the adjusting system according to the gap data fed back by the monitoring device; the adjusting system is additionally provided with a worm and gear differential adjusting device and an additional rotating device to adjust the original output on the basis of not changing the matching of the original bevel gear and the input and the output. When the clearance value exceeds the allowable range, the additional rotating device receives a signal transmitted by the millimeter-scale laser ranging sensor, regulates and controls the worm gear differential device, controls the output rotating speed, and further regulates the clearance of the matching position of the screw rod and the nut column in the safety mechanism, so that the clearance is changed back to the allowable range.
Description
Technical Field
The invention relates to the field of ship lift operation safety equipment, in particular to a method and a device for adjusting a thread pair clearance of a safety mechanism of a gear rack climbing type ship lift.
Background
The thread pair clearance between the screw rod and the nut column of the safety mechanism is an important parameter of the gear rack climbing ship lift. The ideal gap value is moderate, the excessive gap value can cause the scale of the safety mechanism and the driving mechanism to be unnecessarily enlarged, and the insufficient gap value can influence the normal operation of the ship lift. However, in the process, the clearance of the screw pair will randomly change during the lift of the ship box due to the influence of factors such as manufacturing errors of the transmission system, displacement of the tower and the ship box, manufacturing and installation errors of the equipment, and the like. In the prior art, the change of the gap size under the normal operation condition of the ship lift can meet the engineering requirement through a traditional experience trial operation method. The defect is that the empirical trial operation technology is not a real adjustable and controllable technology, is more biased to the traditional empirical design, cannot regulate and control the gap mutation caused by various sudden situations, and is difficult to fundamentally ensure the safe operation of the ship lift.
Disclosure of Invention
The invention aims to provide a method and a device for adjusting the clearance of a screw pair between a screw rod and a nut column of a safety mechanism of a gear rack climbing ship lift, which can ensure that the clearance of the screw pair of the safety mechanism of the ship lift is ensured within a safety range no matter under a normal operation condition or an emergent fault condition, and ensure the normal operation of the ship lift.
The invention relates to a method for adjusting the clearance of a thread pair of a safety mechanism of a gear rack climbing ship lift, which is characterized in that:
the design has the closed loop control system who detects and adjust for detect and adjust safety mechanism screw thread pair clearance, this control system includes screw thread pair clearance monitoring devices, control system and governing system:
the monitoring device is used for monitoring the thread pair clearance;
the control system starts the adjusting system according to the gap data fed back by the monitoring device;
the adjusting system is additionally provided with an additional rotating transmission device to adjust the original output on the basis of not changing the matching of the original bevel gear and the input and the output. In particular to a worm gear differential gear and an additional transmission device for driving the worm gear differential gear.
Further, the monitoring device is a millimeter-scale laser sensor. Preferably, the millimeter-scale laser sensor is YF-JS40 type, the linear measuring range is 50-90mm, and the resolution is 10 μm.
The invention also designs a device for realizing the method for adjusting the clearance of the thread pair of the safety mechanism of the gear rack climbing ship lift, which is characterized in that: including millimeter level laser rangefinder sensor, control module, additional rotating device and worm gear differential device:
the millimeter-scale laser ranging sensor is arranged on a nut column of the safety mechanism and used for monitoring a thread pair gap;
the control module is used for receiving a thread pair clearance signal and starting the additional rotating device;
the additional rotating device is arranged outside the original bevel gear box body and comprises a servo motor controlled by a control module, and a planetary gear reducer is connected to an output shaft of the servo motor;
the worm gear and worm differential device is arranged in the gear box and comprises a planet carrier, a first bevel gear and a second bevel gear, wherein the first bevel gear and the second bevel gear are arranged on the planet carrier, the first bevel gear is matched with a third bevel gear on the input shaft, the second bevel gear is matched with a fourth bevel gear on the output shaft, a worm gear is coaxially arranged on the second bevel gear, and a worm matched with the worm gear is connected with the output shaft of the servo motor through a coupler.
The invention has the advantages that:
when the clearance value is within the allowable range, the additional rotating device does not work, and the worm gear differential device and the original bevel gear transmission device of the ship lift normally transmit the rotating speed of the output shaft of the main speed reducer; when the clearance value exceeds the allowable range, the additional rotating device receives a signal transmitted by the millimeter-scale laser ranging sensor, adjusts and controls the output rotating speed of the worm gear differential mechanism, and further adjusts the clearance of the matching position of the screw rod and the nut column in the safety mechanism, so that the clearance is changed back to the allowable range.
1. In terms of installation, the invention is convenient to install, and only needs to be installed at the corresponding position of the original bevel gear box of the ship lift without changing the structure of the original ship lift.
2. Functionally, the invention can realize real-time monitoring and automatic adjustment of the clearance value, and if the clearance value exceeds the allowable range, the additional rotating device and the worm and gear differential device quickly react to restore the clearance value to the allowable range.
3. In terms of use effect, the invention can ensure that the clearance keeps proper allowance in the full stroke of the ship compartment so as to ensure that the upper thread surface and the lower thread surface of the thread pair between the screw rod and the nut column of the safety mechanism are not contacted under the normal operation working condition of the ship lift.
4. The clearance between the locking screw and the nut column of the ship lift safety mechanism can be monitored in real time by installing the millimeter-scale laser sensor on the nut column in the safety mechanism, so that the clearance value is analyzed, when the clearance value is within an allowable range, the additional rotating device does not work, and the worm and gear differential device normally operates; when the clearance value exceeds the allowable range, the additional rotating device receives a signal transmitted by the millimeter-scale laser ranging sensor, inputs additional rotation, regulates and controls the output rotating speed of the worm gear differential mechanism, and further regulates the clearance of the screw and nut column matching position in the safety mechanism, so that the clearance is changed back to the allowable range.
Drawings
FIG. 1 is a schematic diagram of the automatic control of the regulation method of the present invention;
FIG. 2 is a plan view of the gap between the screw of the safety mechanism and the nut post of the safety mechanism, which is the control target of the present invention;
FIG. 3 is a schematic diagram of the assembly of the worm gear differential device and the positions of the worm gear differential device and the additional rotating device.
In the figure: an additional rotating device 1, a worm gear differential device 2, a safety mechanism screw rod 3, a safety mechanism nut column 3.2, a millimeter-scale laser ranging sensor 4, a worm wheel 9, a worm 10, a planet carrier 11, a first bevel gear 12, a sleeve 13, a second bevel gear 14, a bearing 15, a fourth bevel gear 16, a third bevel gear 17, an input shaft 18, an output shaft 19, an L1And L2Is a thread pair clearance.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
The invention discloses a method for adjusting a thread pair clearance of a safety mechanism of a gear rack climbing ship lift, which comprises the following specific steps:
the design has the closed loop control system who detects and adjust for detect and adjust safety mechanism screw thread pair clearance, this control system includes screw thread pair clearance monitoring devices, control system and governing system:
the monitoring device is used for monitoring the thread pair clearance;
the control system starts the adjusting system according to the gap data fed back by the monitoring device;
the adjusting system is additionally provided with a worm and gear differential device and an additional rotation transmission device on the basis of not changing the matching of the original bevel gear and the input and the output so as to adjust the original output.
As shown in fig. 1, the device for realizing the method for adjusting the clearance of the nut column thread pair of the ship lift safety mechanism comprises an additional rotating device 1, a worm and gear differential device 2, a safety mechanism screw rod 3 and a millimeter-scale laser ranging sensor 4. When the clearance between the safety mechanism screw rod 3 and the safety mechanism nut column exceeds an allowable value, the millimeter-scale laser ranging sensor 4 sends a signal to control the additional rotating device 1 to generate additional rotation, the output rotating speed of the worm and gear differential device 2 is regulated and controlled through the additional rotation, and then the clearance between the safety mechanism screw rod 3 and the safety mechanism nut column is controlled to be restored to an allowable range.
Furthermore, the millimeter-scale laser sensor 4 is YF-JS40 type, the linear measuring range is 50-90mm, and the resolution is 10 μm. The designed and determined gap value is +/-60 mm, and the millimeter-scale laser sensor can meet the measuring range requirement and can accurately measure the gap value.
Furthermore, the gap between the locking screw rod and the nut column of the safety mechanism of the ship lift can be monitored in real time by installing the millimeter-scale laser sensor 4 on the nut column in the screw rod 3 of the safety mechanism, and then the gap value is analyzed. When the gap value is within the allowable range, the millimeter-scale laser sensor 4 does not send a signal; when the clearance value exceeds the allowable range, the millimeter-scale laser sensor 4 sends a signal to control the additional rotating device 1 to generate additional movement.
The worm and gear differential device 2 is arranged at a corresponding position of an original bevel gear box of the ship lift and replaces original bevel gear transmission, and the worm and gear differential device 2 consists of an input shaft 18 and an upper component thereof, an output shaft 19 and an upper component thereof, a planet carrier 11 and an upper component thereof, a worm wheel 9 and a worm 10 main body; the input shaft 18 is fixed on the gear box body through a sleeve 13 arranged on the input shaft, and a third bevel gear 17 is arranged on the input shaft 18 to complete the input of power from the main transmission system to the worm and gear differential device 2; a first bevel gear 12 and a second bevel gear 14 are mounted on the planet carrier 11, wherein the first bevel gear 12 is meshed with a third bevel gear 17 on an input shaft 18, and the bevel gear 14 is meshed with a fourth bevel gear 16 on an output shaft 19 to complete power transmission from the input shaft 18 to the output shaft 19; the worm wheel 9 and the bevel gear 14 are coaxially arranged, the worm 10 is connected with the additional rotating device 1, and the worm wheel and the worm are responsible for transmitting additional rotating speed; the output shaft 19 is provided with a bearing 15 and a bevel gear 16, and power is output to the screw of the safety mechanism through the meshing of the fourth bevel gear 16 and the second bevel gear 14.
Furthermore, an additional rotating device 1 is arranged outside the original bevel gear box, the additional rotating device 1 consists of a servo motor, a coupler and a single-stage planetary gear reducer, a worm 10 is connected with an output shaft of the servo motor through the coupler, the servo motor is excited by a control module, the control module judges whether the gap of a gear pair needs to be adjusted or not by receiving signals of a millimeter-scale laser ranging sensor 4, thereby exciting the additional rotary servo motor to transfer power to the worm 10 in the worm gear differential device 2 through the coupler after the speed of the additional rotary servo motor is regulated through the single-stage planetary gear reducer, then transmitted to the worm wheel 9 through worm gear transmission, the worm wheel 9 transmits power to the second bevel gear 14 on the planet carrier 11 through coaxial rotation, and the second bevel gear 14 transmits additional motion to the fourth bevel gear 16 through meshing transmission, so that the rotating speed of the output shaft 19 to the screw of the safety mechanism is adjusted.
The specific implementation process of the worm gear device and the additional motion device is as follows:
the schematic position diagram of the screw rod 3 and the nut column 3.2 of the safety mechanism of the ship lift is shown in fig. 2, the schematic position diagram of the worm gear differential device 2 and the additional rotating device 1 is shown in fig. 3, taking the three gorges ship lift as an example, during normal lifting, L in fig. 21And L2The distances in the vertical direction are both 60mm, when the screw rod fluctuates in the vertical direction, the two distances are equal to each other, the distance and the distance are kept constant with 120mm, a safety threshold value s is set, and when the millimeter-scale laser ranging sensor 4 monitors (60-s) mm<L1<(60+ s) mm, said attachmentWhen the rotation adding device 1 does not work at this time, the rotating speed of the output shaft of the main speed reducer is transmitted to the bevel gear 14 on the planet carrier 11 through the input shaft 18 and the third bevel gear 17 on the input shaft, and then is transmitted to the fourth bevel gear 16 on the output shaft 19 through the meshing of the bevel gears, and is directly output to the screw rod 3 of the safety mechanism. When the millimeter-scale laser ranging sensor 4 monitors L1>(60+ s) mm or L1<(60-s) mm, the additional rotating device 1 starts to work, the servo motor is started, the size and the direction of the additional rotating speed are controlled and transmitted to the worm 10 in the worm gear differential device 1 through a single-stage planetary gear reducer and a coupling, the worm wheel 9 is driven to rotate by the worm gear and worm driving belt, the worm wheel 9 drives the second bevel gear 14 by coaxial transmission, the second bevel gear 14 is meshed with the bevel gear 16 on the output shaft 19, thereby hindering or promoting the rotation of the fourth bevel gear 16 outputting power, and thus adjusting the rotation speed of the output shaft 19, the rotation speed of the output shaft 19 of the worm gear differential gear is transmitted to the safety gear screw 3 backward through a pair of bevel gears, therefore, the rotating speed of the screw rod 3 of the safety mechanism is controlled, and finally the gap is controlled through controlling the rotating speed of the safety mechanism 3 relative to the nut column of the safety mechanism, so that collision between the screw rod and the nut column is avoided.
The embodiments of the present invention are described in detail with reference to the drawings, but the present invention is not limited to the embodiments. The skilled person can modify the above described embodiments without departing from the innovative points and operating steps of the present invention, within the scope of the appended claims. The scope of the invention is to be covered by the following claims.
Claims (3)
1. The utility model provides a rack and pinion formula ship lift safety mechanism screw thread pair clearance adjustment method which characterized in that:
designing a closed-loop control system with detection and adjustment functions, wherein the closed-loop control system is used for detecting and adjusting the thread pair clearance of the safety mechanism and comprises a thread pair clearance monitoring device, a control system and an adjusting system;
the monitoring device is used for monitoring the thread pair clearance;
the control system starts the adjusting system according to the gap data fed back by the monitoring device;
the adjusting system is additionally provided with an additional rotating transmission device to adjust the original output on the basis of not changing the matching of the original bevel gear and the input and output;
the device for realizing the method comprises a millimeter-scale laser ranging sensor (4), a control module, an additional rotating device (1) and a worm and gear differential device (2),
the millimeter-scale laser ranging sensor (4) is arranged on a nut column of the safety mechanism and used for monitoring a thread pair gap;
the control module is used for receiving a thread pair clearance signal and starting the additional rotating device;
the additional rotating device (1) is arranged outside the original bevel gear box body and comprises a servo motor controlled by a control module, and a planetary gear reducer is connected to an output shaft of the servo motor;
the worm and gear differential device (2) is arranged in a gear box and comprises a planet carrier (11) and a first bevel gear (12) and a second bevel gear (14) which are arranged on the planet carrier, wherein the first bevel gear is matched with a third bevel gear (17) on an input shaft (18), the second bevel gear (14) is matched with a fourth bevel gear (16) on an output shaft (19), a worm wheel (9) is coaxially arranged on the second bevel gear (14), and a worm (10) matched with the worm wheel (9) is connected with an output shaft of a servo motor through a coupler.
2. The method for adjusting the clearance of the thread pair of the safety mechanism of the rack and pinion climbing ship lift according to claim 1, wherein: the monitoring device is a millimeter-scale laser sensor.
3. The method for adjusting the clearance of the thread pair of the safety mechanism of the rack and pinion climbing ship lift according to claim 2, characterized in that: the millimeter-scale laser sensor is YF-JS40 type.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910563665.6A CN110616701B (en) | 2019-06-26 | 2019-06-26 | Method and device for adjusting clearance of thread pair of safety mechanism of gear rack climbing type ship lift |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910563665.6A CN110616701B (en) | 2019-06-26 | 2019-06-26 | Method and device for adjusting clearance of thread pair of safety mechanism of gear rack climbing type ship lift |
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| CN110616701A CN110616701A (en) | 2019-12-27 |
| CN110616701B true CN110616701B (en) | 2021-04-02 |
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| CN201910563665.6A Active CN110616701B (en) | 2019-06-26 | 2019-06-26 | Method and device for adjusting clearance of thread pair of safety mechanism of gear rack climbing type ship lift |
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| CN111424629B (en) * | 2020-04-24 | 2021-08-24 | 长江三峡通航管理局 | Ship lift safety mechanism dismounting system and dismounting method |
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| SE388468C (en) * | 1975-06-04 | 1978-10-23 | Skf Nova Ab | PLANET EXCHANGE WITH ALTERNATIVE FRICTION AND TEETH TRANSMISSION |
| CN101982279A (en) * | 2010-10-27 | 2011-03-02 | 武汉纺织大学 | Servo differential transmission device for gear slotting machine |
| CN103234024A (en) * | 2013-04-28 | 2013-08-07 | 浙江工业大学 | Mechanical clearance-eliminating transmission device of double worm and worm gear mechanism |
| CN204253774U (en) * | 2014-06-06 | 2015-04-08 | 黄智超 | A kind of device realizing Non-follow control and automatically control |
| CN104806722A (en) * | 2015-04-29 | 2015-07-29 | 东北大学 | Double-pendulum head structure driven by differential double motors |
| CN106969720A (en) * | 2017-04-01 | 2017-07-21 | 中国长江三峡集团公司 | Ship lift release mechanism screw thread auxiliary air gap integrated intelligence monitor control system and method |
| CN109804179A (en) * | 2016-08-16 | 2019-05-24 | 路易斯·马里亚·安东内洛 | Gap is controlled or the gear reduction unit of zero clearance |
-
2019
- 2019-06-26 CN CN201910563665.6A patent/CN110616701B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE388468C (en) * | 1975-06-04 | 1978-10-23 | Skf Nova Ab | PLANET EXCHANGE WITH ALTERNATIVE FRICTION AND TEETH TRANSMISSION |
| CN101982279A (en) * | 2010-10-27 | 2011-03-02 | 武汉纺织大学 | Servo differential transmission device for gear slotting machine |
| CN103234024A (en) * | 2013-04-28 | 2013-08-07 | 浙江工业大学 | Mechanical clearance-eliminating transmission device of double worm and worm gear mechanism |
| CN204253774U (en) * | 2014-06-06 | 2015-04-08 | 黄智超 | A kind of device realizing Non-follow control and automatically control |
| CN104806722A (en) * | 2015-04-29 | 2015-07-29 | 东北大学 | Double-pendulum head structure driven by differential double motors |
| CN109804179A (en) * | 2016-08-16 | 2019-05-24 | 路易斯·马里亚·安东内洛 | Gap is controlled or the gear reduction unit of zero clearance |
| CN106969720A (en) * | 2017-04-01 | 2017-07-21 | 中国长江三峡集团公司 | Ship lift release mechanism screw thread auxiliary air gap integrated intelligence monitor control system and method |
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