Deep-sea winch system drum stress detection system and method

Abstract

The present invention provides a deep-sea winch system drum stress detection system and method, the system includes two working parts with the same structure and symmetrical arrangement; any of the working parts includes: a safety frame, a rope reel hoisted under the safety frame, and a motor-driven winch, the cable passes through the rope reel of the two working parts to connect the two motor-driven winches; a data acquisition device and an encoder are provided on the winch drum flange of the motor-driven winch, a strain gauge is provided inside the winch drum, and the data acquisition device is used to collect the signal generated by the strain gauge; a weighing sensor is provided on the rope reel. The present invention detects the strain data of the drum under a variety of cable winding layers for cables of different materials and specifications under different load conditions, and obtains stress information through data processing, thereby analyzing the stress condition of the drum, and further optimizing the drum structure of the deep-sea winch system.

Description

Technical Field

[0001] The present invention relates to the field of deep-sea winch systems, and in particular to a deep-sea winch system drum stress detection system and method. Background Art

[0002] As deep-sea scientific research and marine resource development gradually move from nearshore to offshore, the depth of offshore operations continues to increase, and the cables in the cable storage winches of the corresponding winch systems are also getting longer and longer. According to the needs of deep-sea offshore operations, the current rope capacity of the drum has exceeded 13,000m. In order to solve the problem of excessive weight of traditional steel cables, more and more winch systems use synthetic fiber cables. However, in some cases, for winch systems using synthetic fiber cables, the multi-layer winding of the cable on the drum will cause permanent deformation and damage to the drum structure. Therefore, it is increasingly important to study the stress relationship of the cable wound on the drum. In the process of monitoring the stress of the drum, the influence of different types of cables and different loads on the winch drum can be analyzed, so as to optimize the drum structure of the deep-sea winch system, reduce the weight of the winch system, and extend the service life of the deep-sea winch system. Summary of the invention

[0003] According to the problem of lack of accurate cable winch system drum stress detection device in the prior art, a winch drum stress detection device for deep-sea winch system is provided. The present invention builds a set of detection experimental platforms suitable for cable detection, and uses various sensor elements to detect the strain data of the drum under various cable winding layers for cables of different materials and specifications under different load conditions, obtain stress information through data processing, and then analyze the stress condition of the drum, and optimize the drum structure of the deep-sea winch system.

[0004] The technical means adopted by the present invention are as follows:

[0005] A deep-sea winch system drum stress detection system comprises two working parts with identical structures and symmetrically arranged; any of the working parts comprises: a safety frame, a rope winding wheel hoisted under the safety frame and a motor-driven winch, a cable passes around the rope winding wheels of the two working parts to connect the two motor-driven winches; a data acquisition device and an encoder are arranged on the winch drum flange of the motor-driven winch, a strain gauge is arranged inside the winch drum, and the data acquisition device is used to collect the signal generated by the strain gauge; a weighing sensor is arranged on the rope winding wheel.

[0006] Furthermore, any of the working parts also includes a guide wheel for adjusting the working height of the cable.

[0007] Furthermore, the data acquisition device is a strain gauge, and the strain gauge is evenly arranged on the winch drum flange in the circumferential direction.

[0008] Furthermore, a plurality of strain gauges are evenly arranged on the intersection line between the longitudinal center plane of the winch drum and the interior of the winch drum.

[0009] Furthermore, a plurality of strain gauges symmetrical about the longitudinal center plane of the winch drum are arranged inside the winch drum.

[0010] The present invention also provides a method for detecting drum stress of a deep-sea winch system based on the above system, comprising the following steps: starting the motor-driven winch of the first working part, and driving the motor-driven winch of the second working part to start rotating through a cable; starting the motor-driven winch of the second working part to simulate a working load and to pull against the motor-driven winch of the first working part, and continuously adjusting the speed and tensile load of the motor-driven winch of the second working part according to preset values; and collecting and analyzing the detection data through a weighing sensor, an encoder, a strain gauge and a data acquisition device.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. The present invention designs a dedicated experimental platform for the winch drum stress detection method, making the detection process more convenient and quantifiable. At the same time, it improves the current situation that the winch drum stress state detection is difficult to accurately measure, and effectively implements a more scientific, more efficient, and sustainable research detection scheme.

[0013] 2. The present invention can analyze the stress conditions of winch drums of different cables (especially synthetic fiber cables) under different loads, and then select suitable cable types for different offshore operating environments and working conditions, and optimize the winch drum structure to avoid permanent deformation or damage to the winch drum caused by synthetic fiber cables.

[0014] 3. The present invention can prevent the cable from failing prematurely due to fatigue and wear by optimizing the winch drum structure, thereby extending the service life of the synthetic fiber cable, reducing the probability of safety accidents in the deep-sea winch system, and ensuring operational safety.

[0015] Based on the above reasons, the present invention can be widely promoted in the field of marine machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of the structure of the drum stress detection system of the deep-sea winch system of the present invention.

[0018] Figure 2 Schematic diagram of the arrangement of strain gauges in the drum stress detection system in the embodiment.

[0019] Figure 3 It is a cross-sectional view of the winch drum structure in the embodiment.

[0020] Figure 4 Schematic diagram of the arrangement of strain gauges in the drum stress detection system in the embodiment.

[0021] In the figure: 1. Motor driven winch; 101. winch drum; 102. winch flange; 103. strain gauge; 2. data acquisition device; 3. encoder; 4. rope pulley; 5. safety frame; 6. hydraulic cylinder; 7. guide wheel. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0026] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0027] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0028] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0029] like Figure 1As shown, the present invention provides a deep-sea winch system drum stress detection system, including two working parts with the same structure and symmetrically arranged; any of the working parts includes: a safety frame 5, a rope reel 4 hoisted under the safety frame, and a motor-driven winch 1, and the cable passes through the rope reel 4 of the two working parts to connect the two motor-driven winches 1; the winch drum flange 102 of the motor-driven winch 1 is provided with a data acquisition device 2 and an encoder 3, and a strain gauge 103 is arranged inside the winch drum 101, the data acquisition device 2 is used to collect the signal generated by the strain gauge 103, and the rope reel 4 is provided with a weighing sensor. Further, the system also includes a guide wheel 7 for adjusting the working height of the cable. Preferably, the data acquisition device 2 is a strain gauge, and the strain gauge is evenly arranged on the winch drum flange in the circumferential direction. A plurality of strain gauges 103 are evenly arranged on the intersection line between the longitudinal center plane of the winch drum and the inside of the winch drum. A plurality of strain gauges 103 symmetrical about the longitudinal center plane of the winch drum are arranged inside the winch drum.

[0030] The scheme of the present invention is further described below through specific embodiments:

[0031] Example 1

[0032] like Figure 1-4 As shown, this embodiment discloses a deep-sea winch system drum stress detection test bench system, which includes a drum stress detection system arranged in various parts.

[0033] Specifically, the test bench system includes a first working part motor-driven winch 1, which is arranged in sequence, and a cable wound thereon is connected to the second working part motor-driven winch 1 through a pulley system, and is pulled to rotate, thereby generating tension on the second working part motor-driven winch 1 connected to the cable. The first working part motor-driven winch and the second working part motor-driven winch have exactly the same structure, and both include a winch drum 101, a car flange 102, and a motor and other components. The pulley system is composed of the first and second working part rope winding wheels 4, and the first and second working part guide wheels 7. Specifically, the cable starts from the first working part motor-driven winch and passes through the first working part rope winding wheel, the first working part guide wheel, the second working part guide wheel, the second working part rope winding wheel, and the second working part rope winding wheel to the second working part motor-driven winch. It can be understood that the two working parts of the system can be functionally interchangeable and operate in both directions.

[0034] The drum stress detection system includes an encoder 3, a load cell, a data acquisition device 2, and a strain gauge 103. The load cell is mounted on the rope reel 4, the data acquisition device 2 is mounted on the winch drum flange 102 of the motor-driven winch 1, and the strain gauge 103 is mounted inside the winch drum 101. The two winch drums 101 are designed to handle high loads and stresses during testing, and preferably, both drums are smooth and have no grooves.

[0035] As the motor of the winch of the first working part starts, it drives the drum of the winch of the second working part to rotate, and the cable wound on it drives the first working part rope wheel, the first working part guide wheel, the second working part guide wheel, and the second working part rope wheel to rotate in turn, thereby generating tension on the second motor-driven winch connected to the cable. At this time, the lifting load of the winch can be increased by adjusting the motor of the winch of the second working part; the encoder set on the winch motor, the weighing sensor set on the rope wheel, the data acquisition device set on the flange of the motor-driven winch winch drum, and the strain gauge installed inside the winch drum are used to collect the index data during the operation of the system. Specifically, the strain gauge collects the strain signal of the winch drum, and after being collected by the strain gauge, it is converted into stress information through formula calculation.

[0036] The entire system uses input from load cells and encoders and the linear motion of the winding pulley driven by a hydraulic cylinder to continuously control the rope tension and winch speed. The guide pulley lowers the wire rope to the working height to allow potential testing of the transverse elastic modulus or rope friction of the cable using two driven drums of different diameters. As a preferred embodiment, Figure 2 As shown, in this embodiment, the strain measurement is controlled by five strain gauges, which are used to amplify and send the strain data output by the strain gauges. During the test, Wi-Fi is used to remotely control and monitor the measurement.

[0037] like Figure 4 As shown, in this embodiment, the strain signal is detected and calculated by a biaxial strain gauge, which is glued to the inside of the drum at equal circumferential spacing at the center between the flanges. Specifically, optionally, the strain detection device includes 14 biaxial strain gauges 103 to measure the strain of the drum. Figure 4 This is the expansion diagram of the strain gauge inside the drum in this embodiment. The strain gauges are evenly distributed and linearly expanded in the neutral part of the drum. The angle difference between two adjacent strain gauges is 30°. 14 strain gauges are glued inside the drum, in the center between the winch flanges, and the spacing on the circumference is equal. The strain gauges are coated with glue, and the accuracy after installation is estimated to be ±3%. The drum is also equipped with strain gauges to collect strain gauge signals, with 6 on the outside of each flange, Figure 2 As shown. The obtained strain signal is measured by the strain gauge, transmitted to the strain gauge, and finally obtained by analysis. All measurements are carried out indoors on the experimental bench of the present invention, and the conditions of each trial run are stable and the ambient temperature is constant.

[0038] Example 2

[0039] This embodiment provides a stress detection method based on the system described in Embodiment 1, comprising the following steps:

[0040] Starting the motor of the first working part motor-driven winch drives the winch drum to rotate, and the cable wrapped around it drives the first working part rope pulley, the first working part guide wheel, the second working part guide wheel, and the second working part rope pulley to rotate in turn, thereby generating tension on the second motor-driven winch connected to the cable.

[0041] The pulling load on the winch in actual application is adjusted by starting the motor of the first working part to drive the motor of the winch and adjusting the power of the motor to drive the winch;

[0042] The load cells, encoders and hydraulic cylinders of the first and second working parts are started, and the rope tension and winch speed are continuously controlled through the input of the load cells and encoders and the linear movement of the winding pulley driven by the hydraulic cylinder.

[0043] The working height of the cable is adjusted using the guide wheels of the first and second working parts to a suitable height for conducting experiments, so as to conduct potential tests on the transverse elastic modulus or cable friction of the cable using two driven drums of different diameters.

[0044] The strain gauges are activated and the stress data extracted by the strain gauges are collected and processed. During the test, the measurements are remotely controlled and monitored using Wi-Fi.

[0045] Turn on the data logger to collect and analyze data, and further evaluate the working conditions of the cable and drum based on the collected drum strain data and deformation information.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A deep-sea winch system drum stress detection system, characterized in that: It comprises two working parts with the same structure and symmetrically arranged; Any of the working parts comprises: a safety frame (5), a rope reel (4) hoisted under the safety frame (5), and a motor-driven winch (1), and a cable passes through the rope reel (4) of two working parts to connect the two motor-driven winches (1); A data acquisition device (2), an encoder (3), and a winch drum (101) are provided on the winch drum flange (102) of the motor-driven winch (1), wherein the data acquisition device (2) is used to collect signals generated by a strain gauge (103); The rope winding wheel (4) is provided with a weighing sensor; a plurality of strain gauges (103) are evenly arranged on the intersection line between the longitudinal center plane of the winch drum (101) and the inner wall of the winch drum; the data acquisition device (2) is a strain gauge, and the strain gauges are evenly arranged on the flange of the winch drum in the circumferential direction; When the system is in operation, the motor of the motor-driven winch (1) of the first working part is started, driving the winch drum (101) of the second working part to rotate, and the cable wound on the winch drum (101) of the first working part sequentially drives the first working part rope winding wheel (4), the first working part guide wheel (7), the second working part guide wheel (7), and the second working part rope winding wheel (4) to rotate, thereby generating a pulling force on the motor-driven winch (1) of the second working part connected to the cable. At this time, the lifting force of the motor-driven winch (1) is increased by adjusting the motor of the motor-driven winch (1) of the second working part. load; using an encoder arranged on the motor of the motor-driven winch (1), a weighing sensor arranged on the rope reel (4), a data acquisition device arranged on the winch drum flange of the motor-driven winch (1), and a strain gauge (103) installed inside the winch drum (101) to collect index data during the operation of the system, wherein the entire system uses the input of the weighing sensor and the encoder and the linear movement of the rope reel (4) driven by the hydraulic cylinder (6) to continuously control the rope tension and the winch speed, so as to analyze the winch drum stress conditions of different cables under different loads.

2. The deep-sea winch system drum stress detection system according to claim 1, characterized in that: Any of the working parts also includes a guide wheel (7) for adjusting the working height of the cable.

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