Tension and torque calibration device and method for propeller dynamometer

Abstract

The invention belongs to the related technical field of hydrodynamics, and discloses a tension and torque calibration device and method for a propeller dynamometer, the tension and torque calibration device comprises a calibration frame assembly, a tension applying assembly and a torque applying assembly, and the torque applying assembly is arranged on the calibration frame assembly; the calibration frame assembly is further used for supporting a propeller dynamometer, and the propeller dynamometer is connected to the torque applying assembly and the tension applying assembly. Torque and tensile force are loaded to the propeller dynamometer through the torque applying assembly and the tensile force applying assembly at the same time, so that static calibration of the tensile force and the torque of the propeller dynamometer is carried out; and weights are loaded on the tension weight pan of the tension applying assembly and the torque applying weight pan of the torque applying assembly respectively to realize the application of tension and torque to the propeller dynamometer. According to the invention, the pulling force and the torque are loaded at the same time, and the loaded pushing force and the loaded 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 tension torque calibration device and method for 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, which 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 in 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 with the propeller shaft system and the motor shaft system respectively. The thrust and torque measurement modules are arranged inside it respectively. The thrust and torque on the shaft system are decoupled and measured separately through structural design. 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, only tensile pressure is applied to the shaft system when calibrating the thrust coefficient, and only torque is applied to the shaft system when calibrating the torque coefficient.

[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, the thrust and torque alone cannot be loaded for calibration and will not allow for accurate judgment of the mechanical characteristics of the propeller dynamometer. Summary of the invention

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a thrust 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 purpose, according to one aspect of the present invention, a tension 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 arranged on the calibration frame assembly; the calibration frame assembly is also used to support the propeller dynamometer, the propeller dynamometer being 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, so as to perform static calibration of tension and torque on the propeller dynamometer;

[0006] The propeller dynamometer is provided with a propeller dynamometer shaft system; the torque application assembly includes a torque fixing support, a torque application guide wheel, a torque application member, a torque fixing member, a torque application wire rope and a torque application 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 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, 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 converted in direction through the torque applying guide wheel, and the vertical force on the torque applying weight disk is converted into a torque, and the applied torque can be obtained by measuring the rod length of the torque applying member 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 level and then locked and fixed by adjusting the height of the threaded adjustment rod.

[0010] Furthermore, the torque application guide wheel is arranged on an 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 groove-shaped, and the open groove cooperates 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, the calibration method being to calibrate 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, so as to complete multiple groups of coupling calibrations within the measuring range of the propeller dynamometer.

[0015] In general, compared with the prior art, the above technical solution conceived by the present invention, the device and method for calibrating the thrust torque of a propeller dynamometer provided by the present invention mainly have the following beneficial effects:

[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. Therefore, simultaneous loading of tension and torque can be achieved, and the loaded thrust and torque do not interfere with each other. Static calibration of thrust and torque performance can be performed for actual use scenarios of the propeller dynamometer, thereby improving stability and calibration accuracy.

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

[0018] 3. All joint parts of the tension application rod are hinged, which can ensure that when the tension application rod is placed at the top end of the propeller dynamometer shaft system, the tension weight plate 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, ingenious layout, simple and feasible loading and calibration process, short time consumption 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 a thrust torque calibration device of a propeller dynamometer;

[0022] Figure 3 yes Figure 1 A schematic diagram of a tension applying component and a torque applying component of a tension torque calibration device of a 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 fixed support, 7-tension application rod, 8-tension weight disk, 9-torque fixing member, 10-torque application member, 11-torque application wire rope, 12-torque application weight disk. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain 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 can 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 coupling 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 applying assembly and a torque applying assembly, and the torque applying assembly is arranged on the calibration frame assembly. The calibration frame assembly is also used to support the propeller dynamometer 3, and the propeller dynamometer is connected to the torque applying assembly and the tension applying assembly respectively. The 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, and the torque coupling characteristics of the propeller dynamometer can be calibrated and evaluated by loading a combination of different tension and torque magnitudes.

[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 respectively arranged at the four corners of the base, and the structural body 1 is arranged on one side of the base. The structural body 1 and the bottom leveling members 2 are respectively located on two 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 the calibration process. The bottom leveling member 2 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.

[0030] The propeller dynamometer is used to measure the tension and torque on the shaft system when the propeller rotates, and a propeller dynamometer shaft system 4 is arranged on it. When in use, the propeller dynamometer shaft system 4 is installed in the middle of the propeller shaft system, and the motor drives the propeller dynamometer shaft system 4 and the propeller to rotate together, so as to achieve accurate measurement of the propeller tension and torque. The propeller dynamometer shaft system 4 is provided with a boss structure, which is convenient for forming a series fixation with the propeller or motor shaft system 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 main 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 when the propeller dynamometer is torque loaded to 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 arranged on one end of the structural body away from the base, and is used to assist in supporting the application of torque when the propeller dynamometer torque calibration is completed. 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, and the ends are open grooves, and the open grooves cooperate with the boss structure of the propeller dynamometer shaft system to achieve locking. A fixed connection is formed between the torque fixing member and the torque fixing support 6 to achieve locking of the propeller dynamometer shaft system rotation. The torque applying wire rope 11 is turned 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 a rotational torque for 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-type 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. Among them, each joint part of the tension applying rod 7 is flexibly hinged, which can ensure that when the tension applying rod 7 is placed at the top end of the propeller dynamometer shaft system, the tension weight plate 8 can be in a free vertical hanging state under the action of gravity.

[0035] The application of tension and torque to the propeller dynamometer is achieved by loading weights through the tension applying component and the torque applying component. For the tension applying component, the tension is applied by adding weights on the tension weight plate 8; for the torque applying component, the torque applying wire rope is converted in direction through the torque applying guide wheel 5, and the vertical force on the torque applying weight plate 12 is converted into a torque. The applied torque can be obtained by measuring the rod length of the torque applying member 10 and the weight of the weight on the torque applying weight plate 12.

[0036] During calibration, adjust the four bottom leveling members 2 to make the calibration frame assembly in a horizontal state. After the propeller dynamometer is vertically installed on the main structure, install the torque fixing member in turn and tighten the bolts at the end opening to fix it to the propeller dynamometer shaft system, install the torque application assembly, and connect the torque application wire rope and the torque application weight disk 12. Install the tension application rod and connect the tension application rod with the tension weight disk. After completing the above installation and fixation, clear the tension and torque signals of the propeller dynamometer, and then load the weights of known weights on the tension weight disk and the torque application weight disk 12 in turn. 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 disk and the torque application weight disk 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 by 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 only 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 protection scope of the present invention.

Claims

1. A propeller dynamometer tension torque calibration device, characterized in that: The calibration 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 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, so as 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 application assembly includes a torque fixing support, a torque application guide wheel, a torque application member, a torque fixing member, a torque application wire rope and a torque application 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, 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, 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 on 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, and the applied torque can be obtained by measuring the rod length of the torque applying member 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 for auxiliary support of torque application when completing 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, and the ends are open groove-shaped, and the open groove cooperates with the boss structure 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 part 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 torque of a propeller dynamometer, characterized in that: 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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