Underwater double-shaft free-rotation three-sensor linkage force measuring deviceTechnical Field
The invention relates to a sensor device, in particular to an underwater double-shaft free-rotation three-sensor linkage force measuring device.
Background
The tangential and normal drag coefficients of underwater flexible bodies such as towing ropes, linear arrays and tail ropes are directly related to the fluid drag and the underwater space position and posture, and the drag coefficients of the underwater flexible bodies need to be known firstly when the underwater flexible bodies are simulated and calculated. At present, a method for measuring drag coefficient at home and abroad is generally adopted, a large-scale driving device is used for mounting a tension sensor to measure flow resistance of a drag test piece, the flow resistance is limited by factors such as the length, depth and speed of the driving device of the pool, a gravity cable with a larger dip angle cannot be measured in a pool test when the drag test is carried out, and the tension sensor is difficult to measure the large-scale test piece due to limited strength of a driving limiting tension head. The sensor mounted on the travelling crane device is only provided with a tension sensor, the dip angle of a test piece cannot be synchronously measured, the test body rarely has complete zero buoyancy in actual dragging, the phenomena of floating and sinking are necessarily caused, the pitching angle exists, the measured tension force comprises the water heave force of the test piece, and larger error exists. The inclination angle of the test piece when being stressed is required to be synchronously measured to accurately measure the actual tension value, and the measured value of the tension force is corrected by converting the inclination angle of the pitching, so that more accurate actual lift force resistance can be obtained, and the hydrodynamic coefficient is further calculated.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the underwater double-shaft free-rotation three-sensor linkage force measuring device, which is convenient for measuring tension and inclination angle values under different working conditions by structural design of the force measuring device, and solves the problem of introduction error of heave force in the tension value.
The aim of the invention is achieved by the following technical scheme. The underwater double-shaft free-rotation three-sensor linkage force measuring device mainly comprises an inclination sensor, a tension sensor, a depth sensor, a linkage supporting mechanism, a force bearing frame, a transverse shaft connecting mechanism, a longitudinal shaft connecting mechanism, a shell and a test piece, wherein the linkage supporting mechanism is sequentially connected with the inclination sensor, the tension sensor and the depth sensor from bottom to top, the transverse shaft connecting mechanism transversely penetrates through the longitudinal shaft connecting mechanism and the linkage supporting mechanism, the linkage supporting mechanism can freely rotate around a transverse shaft on a vertical plane, the transverse shaft connecting mechanism, the longitudinal shaft connecting mechanism and the force bearing frame are fixedly connected through screws, the shell is arranged outside the whole structure, and the test piece is fixed on the tension sensor through a lifting ring screw and is collinear.
Furthermore, the linkage supporting mechanism comprises a hoop and a cross connecting plate, the hoop is ring-shaped and is fixedly connected with the cross connecting plate, the linkage supporting mechanism is arranged on the upper side and the lower side of the tension sensor in an up-down symmetrical mode, the cross connecting plates on the upper side and the lower side clamp the tension sensor, and the inclination sensor and the depth sensor are respectively fixedly connected with the hoops arranged up and down.
Furthermore, the bearing frame is shaped like a Chinese character 'men', the top is provided with a longitudinal axis mounting hole, and two sides are symmetrically provided with a transverse axis mounting hole and a plurality of screw holes.
Furthermore, the cross shaft connecting mechanism comprises a cross shaft and cross shaft bearings, wherein the cross shaft bearings are arranged at two ends of the cross shaft and penetrate through cross shaft mounting holes of the bearing frame.
Furthermore, the longitudinal shaft connecting mechanism comprises a longitudinal shaft sleeve and a longitudinal bearing, wherein the longitudinal bearing is arranged at the bottom of the longitudinal shaft sleeve and is fixedly arranged in a longitudinal shaft mounting hole of the bearing frame.
Furthermore, the shell comprises a guide cover and a bearing sleeve, wherein the bearing sleeve is arranged at the top of the guide cover and covers the convex longitudinal axis connecting mechanism, and the guide cover is in an irregular shape and covers the whole structure.
Furthermore, the guide cover is internally provided with a lead of the sensor, and the lead extends upwards to the cabin data acquisition instrument through the hollow longitudinal shaft sleeve and the bearing sleeve through hole.
The beneficial effects of the invention are as follows:
1. the test piece is collinear with the tension sensor, the inclination sensor and the tension sensor are fixedly arranged on the linkage supporting mechanism, tension values and inclination values of the test piece under different working conditions can be synchronously measured, and convenience is provided for calculation of hydrodynamic coefficients of the test piece;
2. the inclination angle value is used for correcting the tension value, so that more accurate actual lifting resistance parameters can be obtained, and reliable and accurate data are provided for calculation.
Drawings
FIG. 1 is an exploded view of the present invention;
FIG. 2 is a schematic diagram of the experimental state of the present invention.
The reference numerals indicate an inclination sensor 1, a tension sensor 2, a depth sensor 3, a hoop 4, a cross connecting plate 5, a bearing frame 6, a transverse shaft 7, a transverse bearing 8, a longitudinal shaft sleeve 9, a longitudinal bearing 10, a guide cover 11, a bearing sleeve 12, a lead 13 and a test piece 14.
Detailed Description
The invention will be described in detail below with reference to the attached drawings:
The underwater double-shaft free-rotation three-sensor linkage force measuring device mainly comprises an inclination sensor 1, a tension sensor 2, a depth sensor 3, a linkage supporting mechanism, a bearing frame 6, a transverse shaft connecting mechanism, a longitudinal shaft connecting mechanism, a shell and a test piece 14, wherein the linkage supporting mechanism is sequentially connected with the inclination sensor 1, the tension sensor 2 and the depth sensor 3 from bottom to top, the transverse shaft connecting mechanism transversely penetrates through the longitudinal shaft connecting mechanism and the linkage supporting mechanism, the linkage supporting mechanism can freely rotate around a transverse shaft in a vertical plane, the transverse shaft connecting mechanism, the longitudinal shaft connecting mechanism and the bearing frame 6 are fixedly connected through screws, the shell is arranged outside the whole structure, and the test piece 14 is fixed on the tension sensor 2 through hanging ring screws and is collinear. The test piece and the tension sensor are collinear, the inclination sensor and the tension sensor are fixedly arranged on the linkage supporting mechanism, the tension value and the inclination value of the test piece under different working conditions can be synchronously measured, the tension value is corrected by the inclination value, so that more accurate actual resistance-increasing parameters can be obtained, and convenient and reliable data are provided for calculation of hydrodynamic coefficients of the test piece.
Embodiment 2 on the basis of embodiment 1, as shown in fig. 1, the linkage support mechanism comprises a hoop 4 and a cross connecting plate 5, the hoop 4 is ring-shaped and is fixedly connected with the cross connecting plate 5, the linkage support mechanism is vertically symmetrically arranged on the upper side and the lower side of the tension sensor 2, the cross connecting plates 5 on the upper side and the lower side clamp the tension sensor 2, and the inclination sensor 1 and the depth sensor 3 are respectively fixedly connected with the hoops 4 arranged on the upper side and the lower side. The inclination angle sensor, the tension sensor and the depth sensor are reliably connected together to form a linkage structure, the structure weights are consistent and vertically symmetrical, so that the linkage part rotates around a transverse shaft to be balanced under a static state, and the error influence of the dead weight and the appearance of the sensor on the inclination angle and the tension is eliminated.
Embodiment 3 based on embodiment 1, the bearing frame 6 is shaped like a door, the top is provided with a vertical axis connection mechanism mounting hole, and two sides are symmetrically provided with a horizontal axis connection mechanism mounting hole and a plurality of screw holes. The bearing frame is effectively and reliably connected with the linkage supporting structure, the transverse shaft connecting mechanism and the longitudinal shaft connecting mechanism to form a completely symmetrical structure arrangement.
Embodiment 4 on the basis of embodiment 1, the transverse shaft coupling mechanism comprises a transverse shaft 7 and transverse bearings 8, wherein the transverse bearings 8 are arranged at two ends of the transverse shaft 7, and the transverse shaft coupling mechanism mounting holes penetrate through the bearing frame 6. The transverse shaft passes through the middle of the tension sensor and is fixed on the bearing frame through a transverse shaft bearing, so that the function that the three-sensor linkage device is kept on the central axis of the frame and rotates freely along the vertical plane is realized.
Embodiment 5 based on embodiment 1, the vertical shaft coupling mechanism comprises a vertical shaft sleeve 9 and a vertical bearing 10, wherein the vertical bearing 10 is arranged at the bottom of the vertical shaft sleeve 9 and fixedly arranged in a vertical shaft mounting hole of the bearing frame 6. The longitudinal shaft mounting holes are formed in the bearing frame, the longitudinal shaft sleeve penetrates through the longitudinal bearing, and the function of freely rotating the bearing frame along the horizontal plane is achieved.
Embodiment 6 based on embodiment 1, the housing comprises a guide cover 11 and a bearing sleeve 12, wherein the bearing sleeve 12 is arranged at the top of the guide cover 11 and covers the convex longitudinal axis connecting mechanism, and the guide cover 11 is irregularly shaped and covers the whole structure. The guide cover after the optimization design can freely rotate around the bearing sleeve, the inner vortex-free and static water state is kept when the drag is reduced to the maximum extent, the influence of turbulence is reduced, and the reasonable tail opening of the guide cover enables the mounting test piece to drive the sensor to freely rotate around the transverse shaft and not interfere with the guide cover.
Example 7 based on example 6, as shown in fig. 2, the guide cover 11 is provided with leads 13 of three sensors, and the leads 13 extend upwards to the cabin data acquisition instrument through the hollow longitudinal shaft sleeve 9 and the through holes of the bearing sleeve 12. The lead wire arranged by adopting the structure does not influence the free rotation of the three sensor linkage force measuring devices.
It should be understood that equivalents and modifications to the technical scheme and the inventive concept of the present invention should fall within the scope of the claims appended hereto.