阅读说明：本技术 基于挠性支承的推力扭矩复合校准隔离结构 (Thrust and torque composite calibration isolation structure based on flexible support ) 是由 倪昔东 林杰俊 蒋卫杰 吴承勇 李子杰 于 2019-11-21 设计创作，主要内容包括：本发明涉及一种基于挠性支承的推力扭矩复合校准隔离结构,标准扭矩传感器一端连接驱动机构,另一端通过波纹管连接动力仪轴,所述标准扭矩传感器通过波纹管实现与动力仪主轴的推力部分计量级隔离,使动力仪主轴推力无法传递到标准扭矩传感器,并由驱动机构带动标准扭矩传感器、波纹管及动力仪主轴旋转,使标准扭矩传感器输出扭矩值,对动力仪轴系扭矩进行校准；所述动力仪主轴上通过两个安装在轴套内的高精度轴承与两个挠性支承连接,轴套下端通过传力杆连接标准推力传感器,由挠性支承座结合高精度轴承,将动力仪主轴的扭矩与推力校准部分隔离,从而实现计量级隔离,并由标准推力传感器输出数据对动力仪主轴轴向力进行校准。(The invention relates to a thrust and torque composite calibration isolation structure based on a flexible support.A standard torque sensor is connected with a driving mechanism at one end and is connected with a power instrument shaft at the other end through a corrugated pipe, the standard torque sensor realizes the measurement level isolation with the thrust part of a power instrument main shaft through the corrugated pipe, so that the thrust of the power instrument main shaft cannot be transmitted to the standard torque sensor, the driving mechanism drives the standard torque sensor, the corrugated pipe and the power instrument main shaft to rotate, the standard torque sensor outputs a torque value, and the torque of a power instrument shaft system is calibrated; the power meter main shaft is connected with the two flexible supports through the two high-precision bearings arranged in the shaft sleeve, the lower end of the shaft sleeve is connected with the standard thrust sensor through the dowel bar, the flexible support seat is combined with the high-precision bearings to isolate the torque and the thrust calibration part of the power meter main shaft, so that the metering magnitude isolation is realized, and the standard thrust sensor outputs data to calibrate the axial force of the power meter main shaft.)

1. The utility model provides a compound calibration isolation structure of thrust moment based on flexible support, has a power appearance main shaft, a drive mechanism, a standard torque sensor and standard thrust sensor that drive power appearance axle is rotatory, its characterized in that: one end of the standard torque sensor is connected with the driving mechanism, the other end of the standard torque sensor is connected with the power instrument shaft through the corrugated pipe, the standard torque sensor is isolated from the thrust part of the power instrument main shaft through the corrugated pipe, so that the thrust of the power instrument main shaft cannot be transmitted to the standard torque sensor, the driving mechanism drives the standard torque sensor, the corrugated pipe and the power instrument main shaft to rotate, the standard torque sensor outputs a torque value, and the torque of the power instrument shaft system is calibrated; the power meter main shaft is connected with the two flexible supports through the two high-precision bearings arranged in the shaft sleeve, the lower end of the shaft sleeve is connected with the standard thrust sensor through the dowel bar, the flexible support seat is combined with the high-precision bearings to isolate the torque and the thrust calibration part of the power meter main shaft, so that the metering magnitude isolation is realized, and the standard thrust sensor outputs data to calibrate the axial force of the power meter main shaft.

2. The flexure support-based thrust-torque composite alignment isolation structure of claim 1, wherein: the calibration mechanism is used for calibrating the standard thrust sensor and comprises a portal frame, pulleys and standard weights, wherein the portal frame is arranged above the shaft sleeve and is connected with the left standard weight and the right standard weight through the pulleys and the ropes on two sides, and the middle of the rope is connected with the upper end of the shaft sleeve.

3. The flexure support-based thrust-torque composite alignment isolation structure of claim 2, wherein: and after the calibration is finished, unloading the weights, and calibrating the thrust of the main shaft of the power meter on line by using a standard force sensor.

4. The flexure support-based thrust-torque composite alignment isolation structure of claim 1, wherein: the flexible support is made of beryllium bronze, an upper thin neck and a lower thin neck are arranged in the middle of the flexible support, and the upper thin neck and the upper support seat form a zero-stiffness system; the zero stiffness characteristic of the flexible support can ensure that axial thrust can be transmitted to a standard thrust sensor without loss, so that the isolation of torque to the thrust is realized.

5. The flexure support-based thrust-torque composite alignment isolation structure of claim 1, wherein: the high-precision bearing in the shaft sleeve is fixed with the shaft sleeve through the compression ring and the butterfly washer, and the friction torque of the high-precision bearing can be removed through test measurement, so that metering level isolation is realized.

6. The flexure support-based thrust-torque composite alignment isolation structure of claim 1, wherein: the driving mechanism is composed of a servo motor, a coupler, a driving shaft and a bearing seat, the servo motor is connected with the driving shaft in the bearing seat through the coupler, the driving shaft is connected with a standard torque sensor, the servo motor drives a power meter main shaft to rotate through the coupler and the driving shaft through the standard torque sensor and a corrugated pipe, and the bearing seat supports the standard torque sensor.

7. The thrust torque composite calibration isolation structure based on flexible supports according to any one of claims 1 to 6, wherein: the thrust and torque composite calibration isolation structure based on the flexible support controls the measurement uncertainty introduced by the mutual influence of the torque and the thrust within 0.1%, and can realize the composite calibration of the torque and the thrust.

Technical Field

The invention relates to a composite loading and calibrating system for shafting torque and thrust, in particular to a comprehensive isolating structure for composite calibration by adopting a flexible support, a bearing and a corrugated pipe.

Background

At present, the calibration coefficient of a device measurement unit is obtained by adopting a static calibration method for the thrust and the torque of a marine model propeller shafting in China, the thrust and the torque are respectively calibrated, the method is not in line with the actual working condition, the calibration of the thrust and the torque of a propeller model cannot be realized from the in-situ state, only the primary evaluation can be carried out on the consistency of a test system on the whole, and the accuracy and the reliability cannot be deeply evaluated.

In order to realize the simultaneous calibration of high-accuracy rotation torque and thrust, a novel composite calibration device for the torque and the thrust of the power meter needs to be developed, the accurate loading and transmission of standard thrust under the rotation condition of a shafting of the power meter are realized, and the calibration of the thrust of the power meter is realized through the comparison of a thrust measurement unit of the power meter and a standard thrust sensor/standard weight. The loaded axial force only has a translation direction, no corner and certain rigidity in the transverse direction and the longitudinal direction. Meanwhile, in order to realize the calibration of the rotating torque, the connecting end of the standard torque sensor cannot be influenced by the axial force, the influence of the axial force on the torque needs to be isolated, and the loaded dynamic load needs to be the pure torque after the friction force and the damping are overcome, so that the axial force isolation component needs to be designed and additionally arranged on the shaft.

Disclosure of Invention

The invention provides a composite calibration isolation structure for thrust and torque based on flexible support aiming at the requirements of composite calibration for on-site torque and thrust of a power instrument, which enables the shafting torque and the thrust to be not influenced by each other by simultaneously adopting the structures such as the flexible support, a bearing, a corrugated pipe and the like, realizes the isolation of the metering magnitude, can simultaneously carry out loading and high-accuracy calibration on the shafting torque and the thrust, solves the problem that the power instrument statically calibrates the torque and the thrust respectively for a long time, enables the calibration condition to be consistent with the actual working condition, and is more beneficial to evaluating the power instrument and a ship model.

The technical scheme of the invention is as follows: a thrust and torque composite calibration isolation structure based on flexible support is provided with a power meter main shaft, a driving mechanism for driving the power meter shaft to rotate, a standard torque sensor and a standard thrust sensor, wherein one end of the standard torque sensor is connected with the driving mechanism, the other end of the standard torque sensor is connected with the power meter shaft through a corrugated pipe, the standard torque sensor realizes the measurement level isolation of the thrust part of the power meter main shaft through the corrugated pipe, so that the thrust of the power meter main shaft cannot be transmitted to the standard torque sensor, the driving mechanism drives the standard torque sensor, the corrugated pipe and the power meter main shaft to rotate, the standard torque sensor outputs a torque value, and the torque of a power meter shaft system is calibrated; the power meter main shaft is connected with the two flexible supports through the two high-precision bearings arranged in the shaft sleeve, the lower end of the shaft sleeve is connected with the standard thrust sensor through the dowel bar, the flexible support seat is combined with the high-precision bearings to isolate the torque and the thrust calibration part of the power meter main shaft, so that the metering magnitude isolation is realized, and the standard thrust sensor outputs data to calibrate the axial force of the power meter main shaft.

Furthermore, the shaft sleeve top is equipped with the calibration mechanism who is used for maring standard thrust sensor, calibration mechanism comprises portal frame, pulley, standard weight, wherein, the portal frame is arranged in the shaft sleeve top to connect left and right standard weight through the pulley and the rope of both sides, and rope intermediate junction the shaft sleeve upper end.

Further, after calibration is completed, the weights are unloaded, and the thrust of the main shaft of the power meter is calibrated on line through the standard force sensor.

Furthermore, the flexible support is made of beryllium bronze, an upper thin neck and a lower thin neck are arranged in the middle of the flexible support, and the upper thin neck and the upper support seat form a zero-stiffness system; the zero stiffness characteristic of the flexible support can ensure that axial thrust can be transmitted to a standard thrust sensor without loss, so that the isolation of torque to the thrust is realized.

Furthermore, the high-precision bearing in the shaft sleeve is fixed with the shaft sleeve through a pressure ring and a butterfly washer, and the friction torque of the high-precision bearing can be removed through test measurement, so that the metering level isolation is realized.

Further, actuating mechanism comprises servo motor, shaft coupling, drive shaft, bearing frame, servo motor passes through the drive shaft in the shaft coupling connection bearing frame, and the drive shaft connection standard torque sensor passes through the shaft coupling by servo motor and the drive shaft drives the rotation of power appearance main shaft through standard torque sensor, bellows, the bearing frame supports standard torque sensor.

Further, the thrust and torque composite calibration isolation structure based on the flexible support controls the measurement uncertainty caused by the mutual influence of the torque and the thrust within 0.1%, and can realize the composite calibration of the torque and the thrust.

The invention has the beneficial effects that:

1. the power meter main shaft system is arranged on the basic platform and driven by a motor, and the standard torque sensor outputs a torque value to calibrate the torque of the shaft system;

2. the standard torque sensor is subjected to static traceability and dynamic traceability by a torque standard machine and a rotating speed characteristic calibration device;

3. the standard torque sensor is isolated from the metering level of the thrust part by a corrugated pipe, and the influence on the calibration uncertainty is within 0.1%;

4. the flexible support is combined with the high-precision bearing to isolate the shafting torque from the thrust calibration part, and the friction torque of the bearing can be removed through test measurement, so that the metering level isolation is realized;

5. the zero stiffness characteristic of the flexible support ensures that the axial thrust can be transmitted to a standard thrust sensor without loss, the axial force is calibrated by data output by the standard thrust sensor, and the measurement uncertainty introduced by the flexible support is within 0.1%;

6. the standard thrust sensor is calibrated on site and is realized by a portal frame, a pulley and a standard weight. After calibration is completed, the weights are unloaded, and the power meter is calibrated on line by a standard thrust sensor;

7. a flexible support based insulation structure; the flexible support is made of beryllium bronze, and 2 thin necks are designed to form a zero-rigidity system together with the upper parts;

8. the thin neck of the flexible support is characterized by being formed by non-mechanical cutting, and the thin neck is enabled to have good toughness by adopting a pressing process, so that the flexible support can support the weight of the upper part.

In conclusion, the flexible support-based push-torsion composite calibration isolation structure disclosed by the invention utilizes the zero-rigidity principle of the flexible support, comprehensively utilizes the corrugated pipe and the high-precision bearing, and carries out magnitude-metering isolation on the torque and the thrust of the shafting. The structure has the advantages of ingenious design concept and simple structure, controls the measurement uncertainty introduced by the mutual influence of the torque and the thrust within 0.1 percent, and can realize the composite calibration of the torque and the thrust. Therefore, the calibration states of the torque and the thrust are consistent with the actual working condition of the power meter, and the real data and the technical characteristics of the power meter can be more accurately reflected.

Drawings

FIG. 1 is a schematic structural diagram of a shafting push-torsion composite calibration system according to the present invention;

FIG. 2 is a schematic view of a flexible mount;

in the figure: the device comprises a servo motor base, a servo motor, a coupler, a bearing seat, a standard torque sensor, a corrugated pipe, a pressure ring, a bearing, a shaft sleeve, a butterfly washer, a power meter main shaft, a basic platform, a gantry, a pulley, a standard weight, a flexible support, a force transmission rod, a standard force sensor and a thin neck, wherein the servo motor base is 1, the servo motor is 2, the coupler is 3, the bearing seat is 4, the standard torque sensor is 5, the corrugated pipe is 6, the pressure ring is 7, the bearing is 9, the shaft sleeve is 10, the butterfly washer is 11.

Detailed Description

The invention is further described with reference to the following figures and examples.

As shown in figure 1, a shafting of a power instrument pushes and twists a compound calibration system, the shafting is arranged on a basic platform, a servo motor 2 is installed on a base 1 of the power instrument, the servo motor 2 drives a coupler 3, a standard torque sensor 5, a corrugated pipe 6 and a power instrument main shaft 11 to rotate, and a bearing seat 4 supports the standard torque sensor 5. The standard torque sensor 5 outputs a torque value to calibrate the shafting torque of the power instrument; the standard torque sensor 5 is subjected to static traceability and dynamic traceability by a torque standard machine and a rotating speed characteristic calibration device; the standard torque sensor 5 is isolated from a thrust part metering stage by the corrugated pipe 6, the torque value of the standard torque sensor 5 can be transmitted to a dynamometer shafting, the thrust of the dynamometer shafting can not be transmitted to the standard torque sensor, and the influence of the thrust on the uncertainty of torque calibration is within 0.1%.

The flexible support 16 is adopted to combine with the high precision bearing 8, so that the shafting torque is isolated from the thrust calibration part. The bearing 8 is arranged in the shaft sleeve 9 and is fixed by the pressure ring 7 and the butterfly washer 10, and the friction torque of the high-precision bearing 8 can be removed through test measurement, so that the metering level isolation is realized.

The sleeve is supported by two flexible supports 16. The standard thrust sensor is calibrated on site and is realized by a portal frame 13, a pulley 14 and a standard weight 15. After calibration is completed, the weight 15 is unloaded, and the thrust of the dynamometer is calibrated on line by the standard force sensor 18. The zero stiffness characteristic of the flexible support 16 ensures that the axial thrust can be transmitted to the standard thrust sensor 18 without loss, so that the isolation of torque from the thrust is realized, the axial force is calibrated by data output by the standard thrust sensor 18, the influence of the torque on the uncertainty of the thrust calibration is within 0.1%, and the magnitude-of-measurement isolation is realized.

FIG. 2 shows a flexible support 16, the flexible support 16 is made of beryllium bronze, and 2 narrow necks 19 are designed to form a zero-stiffness system together with the above components; the thin neck of the flexible support is characterized by being formed by non-mechanical cutting, and the thin neck is enabled to have good toughness and elasticity by adopting a rolling process, so that a zero-rigidity system is convenient to form, and the weight of the upper part can be supported.