A propeller dynamometer tension torque calibration device and method

Abstract

The present invention belongs to the technical field related to hydrodynamics, and discloses a device and method for calibrating the tension and torque of a propeller dynamometer. The device comprises a calibration frame assembly, a tension applying assembly, and a torque applying assembly, wherein the torque applying assembly is arranged on the calibration frame assembly; the calibration frame assembly is also used to support the propeller dynamometer, and the propeller dynamometer is connected to the torque applying assembly and the tension applying assembly respectively; torque and tension are simultaneously applied to the propeller dynamometer via the torque applying assembly and the tension applying assembly to perform static calibration of tension and torque on the propeller dynamometer; tension and torque are applied to the propeller dynamometer by loading weights onto the tension weight disk of the tension applying assembly and the torque applying weight disk of the torque applying assembly respectively. The present invention realizes the simultaneous loading of tension and torque, and the loaded thrust and torque do not interfere with each other.

Description

Technical Field

[0001] The present invention belongs to the technical field related to hydrodynamics, and more specifically, relates to a device and method for calibrating the tension and torque of a propeller dynamometer. Background Art

[0002] As the power unit of conventional ships, the study of the hydrodynamic characteristics of propellers is an important part of ship performance research. It is directly related to the seaworthiness and speed of ships, and affects the safety and economy of ships. The propeller is generally arranged at the stern of the ship and is driven by the main engine inside the hull through the shaft system to achieve high-speed rotation. The thrust generated by the blades is transmitted to the hull through the propeller shaft to propel the ship. In its dynamic characteristics, the input of the main engine power is characterized by the torque of the propeller, and the output of the effective power is characterized by the propeller thrust. In the propeller hydrodynamic test research, a propeller dynamometer is usually used to complete the thrust and torque test. A concentric shaft extends from both ends of the propeller dynamometer to connect to the propeller shaft system and the motor shaft system respectively. The thrust and torque measurement modules are arranged inside it respectively. Through structural design, the thrust and torque on the shaft system are decoupled and measured separately. In order to ensure the validity of the test data, in accordance with relevant test standards and regulations, the propeller dynamometer needs to be calibrated regularly during use. The general calibration process is to calibrate its thrust coefficient and torque coefficient separately, that is, when calibrating the thrust coefficient, only tensile pressure is applied to the shaft system, and when calibrating the torque coefficient, only torque is applied to the shaft system.

[0003] Separately calibrating the thrust and torque of a propeller dynamometer can quickly obtain its calibration characteristics. However, the calibration process is based on the premise that the thrust and torque on the shafting are completely decoupled. During the test, the propeller shafting is simultaneously subjected to thrust and torque. If the thrust and torque decoupling inside the sensor fails, calibration of the propeller dynamometer by loading thrust and torque separately will not be able to accurately determine the mechanical characteristics of the propeller dynamometer. Summary of the Invention

[0004] In response to the above defects or improvement needs of the prior art, the present invention provides a thrust and torque calibration device and method for a propeller dynamometer, which aims to solve the problem of poor stability of the existing separate calibration of thrust and torque of a propeller dynamometer.

[0005] To achieve the above-mentioned object, according to one aspect of the present invention, a tension and torque calibration device for a propeller dynamometer is provided, the calibration device comprising a calibration frame assembly, a tension applying assembly, and a torque applying assembly, the torque applying assembly being disposed on the calibration frame assembly; the calibration frame assembly being further configured to support the propeller dynamometer, the propeller dynamometer being connected to the torque applying assembly and the tension applying assembly, respectively; torque and tension being simultaneously applied to the propeller dynamometer via the torque applying assembly and the tension applying assembly, so as to perform static tension and torque calibration on the propeller dynamometer;

[0006] The propeller dynamometer is provided with a propeller dynamometer shaft system; the torque applying assembly includes a torque fixing support, a torque applying guide wheel, a torque applying member, a torque fixing member, a torque applying wire rope and a torque applying weight plate; one end of the torque fixing support is connected to the calibration frame assembly, and the other end is connected to the torque fixing member, and the torque fixing member is connected to one end of the propeller dynamometer shaft system; the torque applying guide wheel is provided on one end of the calibration frame assembly adjacent to the propeller dynamometer shaft system, and one end of the torque applying member is connected to the The other end of the propeller dynamometer shaft system is connected to one end of the torque application wire rope; the other end of the torque application wire rope passes through the torque application guide wheel and is connected to the torque application weight disk; the tension application assembly includes a tension application rod and a tension weight disk, and the tension application rod is a frame-type structure, one end of which is connected to the tension weight disk, and the other end is connected to the propeller dynamometer shaft system; the application of tension and torque to the propeller dynamometer is achieved by loading weights to the tension weight disk and the torque application weight disk respectively.

[0007] Furthermore, for the tension applying component, tension is applied by adding weights to the tension weight disk; for the torque applying component, the torque applying wire rope is directional-changed through the torque applying guide wheel, converting the vertical force on the torque applying weight disk into a torque, and the applied torque can be obtained by measuring the rod length of the torque applying component and the weight of the weight on the torque applying weight disk; the applied tension is obtained by the weight of the weight on the tension weight disk.

[0008] Furthermore, the calibration frame assembly includes four bottom leveling parts, a rectangular base and a structural body, the four bottom leveling parts are respectively arranged at the four corners of the base, and the structural body is arranged on one side of the base; the structural body and the bottom leveling parts are respectively located on two opposite sides of the base.

[0009] Furthermore, the bottom leveling member is a threaded adjustment rod, and the base is adjusted to a horizontal position and then locked and fixed by adjusting the height of the threaded adjustment rod.

[0010] Furthermore, the torque application guide wheel is arranged on one end of the structural body away from the base, and is used to assist in supporting the application of torque when completing the torque calibration of the propeller dynamometer.

[0011] Furthermore, the torque fixing member and the torque applying member are both lightweight horizontal straight rods, and the ends are open grooves, and the open grooves cooperate with the boss structure of the propeller dynamometer shaft system to achieve locking.

[0012] Furthermore, each joint portion of the tension applying rod is hinged.

[0013] Furthermore, the torque fixing member and the torque applying member are both horizontal straight rods.

[0014] The present invention also provides a method for calibrating the tension and torque of a propeller dynamometer, which calibrates the tension and torque using the tension and torque calibration device of the propeller dynamometer as described above; different coupling loading combinations are achieved by changing the weights on the tension weight disk and the torque application weight disk to complete multiple groups of coupling calibration within the measuring range of the propeller dynamometer.

[0015] In general, compared with the prior art, the above technical solutions conceived by the present invention provide a propeller dynamometer tension torque calibration device and method with the following advantages:

[0016] 1. The torque and tension are simultaneously loaded onto the propeller dynamometer through the torque applying component and the tension applying component to perform static calibration of the tension and torque of the propeller dynamometer, wherein the application of tension and torque to the propeller dynamometer is achieved by loading weights onto the tension weight disk and the torque applying weight disk respectively, thereby achieving simultaneous loading of tension and torque, and the loaded thrust and torque do not interfere with each other, and can perform static calibration of thrust and torque performance according to the actual use scenario of the propeller dynamometer, thereby improving stability and calibration accuracy.

[0017] 2. By changing the weights on the tension weight disc and the torque application weight disc, different coupling loading combinations can be achieved to complete multiple sets of coupling calibration within the measuring range of the propeller dynamometer, which has good applicability.

[0018] 3. All joints of the tension applying rod are hinged, which can ensure that when the tension applying rod is placed at the top end of the propeller dynamometer shaft system, the tension weight disk can be in a free vertical hanging state under the action of gravity.

[0019] 4. The calibration device provided by the present invention has a simple structure, an ingenious layout, and a simple and feasible loading and calibration process, which is time-saving and low-cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of a calibration frame assembly of a tension torque calibration device of a propeller dynamometer provided by the present invention;

[0021] Figure 2 yes Figure 1 A partial schematic diagram of the thrust torque calibration device of the propeller dynamometer;

[0022] Figure 3 yes Figure 1 Schematic diagram of the tension applying assembly and torque applying assembly of the tension torque calibration device of the propeller dynamometer;

[0023] Figure 4 yes Figure 3 An enlarged schematic diagram of the tension applying component and the torque applying component in FIG.

[0024] In all the drawings, the same figure numbers are used to represent the same elements or structures, among which: 1-structural body, 2-bottom leveling member, 3-propeller dynamometer, 4-propeller dynamometer shaft system, 5-torque application guide wheel, 6-torque fixing support, 7-tension application rod, 8-tension weight plate, 9-torque fixing member, 10-torque application member, 11-torque application wire rope, 12-torque application weight plate. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0026] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The present invention provides a tension and torque calibration device for a propeller dynamometer. The calibration device can realize the calibration and verification of the tension and torque coupled loading conditions of the propeller dynamometer, realize the simultaneous static loading of the tension and torque of the propeller dynamometer in the hydrodynamic test, and complete the calibration of the dynamometer. The device is simple and easy to operate.

[0027] The calibration device includes a calibration frame assembly, a tension application assembly, and a torque application assembly, with the torque application assembly mounted on the calibration frame assembly. The calibration frame assembly also supports a propeller dynamometer 3, which is connected to the torque application assembly and the tension application assembly, respectively. The torque application assembly and the tension application assembly simultaneously apply torque and tension to the propeller dynamometer, thereby performing static tension and torque calibration on the propeller dynamometer. Furthermore, the torque coupling characteristics of the propeller dynamometer can be calibrated and evaluated by combining different tension and torque loadings.

[0028] The calibration frame assembly includes four bottom leveling members 2, a rectangular base, and a structural body 1. The four bottom leveling members 2 are located at the four corners of the base, and the structural body 1 is located on one side of the base. The structural body 1 and the bottom leveling members 2 are located on opposite sides of the base. The structural body 1 is used to support the propeller dynamometer and the torque application assembly.

[0029] The base is heavy and has a large contact surface to ensure that the center of gravity of the calibration frame assembly is low enough and stable without shaking during calibration. The bottom leveling member 2 is a threaded adjustment rod, and the base is adjusted to a horizontal position and then locked by adjusting the height of the threaded adjustment rod.

[0030] The propeller dynamometer is used to measure the tension and torque on the propeller shafting during rotation. A propeller dynamometer shafting 4 is mounted on the propeller shafting. During use, the propeller dynamometer shafting 4 is mounted in the middle of the propeller shafting. A motor drives the propeller dynamometer shafting 4 and the propeller to rotate together, enabling accurate measurement of propeller tension and torque. A boss structure is provided on the propeller dynamometer shafting 4 to facilitate serial mounting with the propeller or motor shafting during installation.

[0031] The torque application assembly includes a torque fixing support 6, a torque application guide wheel 5, a torque application member 10, a torque fixing member 9, a torque application wire rope 11, and a torque application weight plate 12. One end of the torque fixing support 6 is connected to the structural body 1, and the other end is connected to the torque fixing member 9. The torque fixing member 9 is connected to one end of the propeller dynamometer shaft system 4. The torque fixing support 6 and the torque fixing member 9 are used to assist in supporting the fixing of the shaft system during torque loading of the propeller dynamometer and prevent the shaft system from rotating. In this embodiment, the torque fixing support 6 is arranged horizontally.

[0032] The torque application guide wheel 5 is located at the end of the main structure away from the base. It is used to assist in supporting the application of torque during the torque calibration of the propeller dynamometer. One end of the torque application member 10 is connected to the other end of the propeller dynamometer shaft system, and the other end is connected to one end of the torque application wire rope 11. The other end of the torque application wire rope 11 passes through the torque application guide wheel 5 and is connected to the torque application weight disk 12.

[0033] The torque fixing member 9 and the torque applying member 10 are both lightweight horizontal straight rods with open slots at their ends. The open slots cooperate with the boss structure of the propeller dynamometer shaft system to achieve locking. The torque fixing member forms a fixed connection with the torque fixing support 6, which locks the rotation of the propeller dynamometer shaft system. The torque applying wire rope 11 rotates from horizontal to vertical through the torque applying guide wheel 5 to convert the vertical gravity of the weights on the torque applying weight disk 12 into rotational torque on the propeller dynamometer.

[0034] The tension-applying assembly includes a tension-applying rod 7 and a tension-weight plate 8. The tension-applying rod 7 is a frame-shaped structure, one end of which is connected to the tension-weight plate 8 and the other end is connected to the end of the propeller dynamometer shaft system away from the base. The various joints of the tension-applying rod 7 are flexibly articulated, ensuring that when the tension-applying rod 7 is placed at the top of the propeller dynamometer shaft system, the tension-weight plate 8 can remain in a freely vertically suspended state under the action of gravity.

[0035] The application of tension and torque to the propeller dynamometer is achieved by loading weights onto the tension-applying assembly and the torque-applying assembly, respectively. For the tension-applying assembly, tension is applied by adding weights to the tension-applying weight plate 8. For the torque-applying assembly, the torque-applying wire rope is directed through the torque-applying guide pulley 5, converting the vertical force on the torque-applying weight plate 12 into a torque. The applied torque is then obtained by measuring the length of the torque-applying member 10 and the weight of the weights on the torque-applying weight plate 12.

[0036] During calibration, the four bottom leveling members 2 are adjusted to make the calibration frame assembly in a horizontal state. After the propeller dynamometer is vertically mounted to the main structure, the torque fixing members are sequentially installed and the bolts at the end openings are tightened to fix them to the propeller dynamometer shaft system. The torque application assembly is installed, and the torque application wire rope is connected to the torque application weight disk 12. The tension application rod is installed and connected to the tension application weight disk. After completing the above installation and fixation, the tension and torque signals of the propeller dynamometer are cleared, and then weights of known weights are loaded on the tension weight disk and the torque application weight disk 12 respectively. At this time, the propeller dynamometer is subjected to the coupling effect of tension and torque. The tension can be obtained by the weight of the weight on the tension weight disk, and the torque can be calculated by the weight of the weight on the torque weight disk and the length of the torque application member. After the coupling loading is completed, the weights on the tension weight disc and the torque application weight disc 12 can be changed to achieve different coupling loading combinations, thereby completing multiple sets of coupling calibration and measurement within the range of the propeller dynamometer.

[0037] The present invention also provides a method for calibrating the tension and torque of a propeller dynamometer. The calibration method calibrates the tension and torque using the tension and torque calibration device of the propeller dynamometer as described above.

[0038] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A propeller dynamometer tension torque calibration device, characterized by: The calibration device includes a calibration frame assembly, a tension applying assembly and a torque applying assembly, wherein the torque applying assembly is arranged on the calibration frame assembly; the calibration frame assembly is also used to support a propeller dynamometer, and the propeller dynamometer is respectively connected to the torque applying assembly and the tension applying assembly; torque and tension are simultaneously loaded onto the propeller dynamometer through the torque applying assembly and the tension applying assembly to perform static calibration of tension and torque on the propeller dynamometer; The propeller dynamometer is provided with a propeller dynamometer shaft system; the torque applying assembly includes a torque fixing support, a torque applying guide wheel, a torque applying member, a torque fixing member, a torque applying wire rope and a torque applying weight plate; One end of the torque fixing support is connected to the calibration frame assembly, and the other end is connected to the torque fixing member, and the torque fixing member is connected to one end of the propeller dynamometer shaft system; the torque application guide wheel is arranged on one end of the calibration frame assembly adjacent to the propeller dynamometer shaft system, and one end of the torque application member is connected to the other end of the propeller dynamometer shaft system, and the other end is connected to one end of the torque application wire rope; The other end of the torque application wire rope passes through the torque application guide wheel and is connected to the torque application weight disk; the tension application assembly includes a tension application rod and a tension weight disk, and the tension application rod is a frame-type structure, one end of which is connected to the tension weight disk, and the other end is connected to the propeller dynamometer shaft system; the application of tension and torque to the propeller dynamometer is achieved by loading weights to the tension weight disk and the torque application weight disk respectively.

2. The propeller dynamometer tension torque calibration device according to claim 1, characterized in that: For the tension applying component, tension is applied by adding weights to the tension weight disk; for the torque applying component, the torque applying wire rope is converted in direction through the torque applying guide wheel, and the vertical force on the torque applying weight disk is converted into a torque. The applied torque can be obtained by measuring the rod length of the torque applying component and the weight of the weight on the torque applying weight disk; the applied tension is obtained by the weight of the weight on the tension weight disk.

3. The propeller dynamometer tension torque calibration device according to claim 1, characterized in that: The calibration frame assembly includes four bottom leveling parts, a rectangular base and a structural body. The four bottom leveling parts are respectively arranged at the four corners of the base, and the structural body is arranged on one side of the base; the structural body and the bottom leveling parts are respectively located on two opposite sides of the base.

4. The propeller dynamometer tension torque calibration device according to claim 3, characterized in that: The bottom leveling member is a threaded adjustment rod, and the base is adjusted to a horizontal level and then locked and fixed by adjusting the height of the threaded adjustment rod.

5. The propeller dynamometer tension torque calibration device according to claim 3, characterized in that: The torque application guide wheel is arranged on one end of the structural body away from the base, and is used to assist in supporting the application of torque when completing the torque calibration of the propeller dynamometer.

6. The propeller dynamometer tension torque calibration device according to claim 1, characterized in that: The torque fixing member and the torque applying member are both lightweight horizontal straight rods with open grooves at their ends. The open grooves cooperate with the boss structures of the propeller dynamometer shaft system to achieve locking.

7. The propeller dynamometer tension torque calibration device according to any one of claims 1 to 6, characterized in that: Each joint portion of the tension applying rod is hinged.

8. The propeller dynamometer tension torque calibration device according to any one of claims 1 to 6, characterized in that: The torque fixing member and the torque applying member are both horizontal straight rods.

9. A method for calibrating the tension and torque of a propeller dynamometer, characterized by: The calibration method is to calibrate the tension and torque using the tension and torque calibration device of the propeller dynamometer described in any one of claims 1 to 8; different coupling loading combinations are achieved by changing the weights on the tension weight disk and the torque application weight disk to complete multiple groups of coupling calibration within the range of the propeller dynamometer.

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