阅读说明：本技术 变温环境下扭矩校准连接系统 (Torque calibration connecting system in variable temperature environment ) 是由 林杰俊 蒋卫杰 李涛 欧阳昕 马相龙 于 2019-11-21 设计创作，主要内容包括：本发明涉及一种变温环境下扭矩校准连接系统,包括加载端连接法兰、加载端传动轴、温控箱、被校扭矩传感器、平衡端传动轴、平衡端连接法兰；所述加载端连接法兰和平衡端连接法兰分别固定连接在加载端和平衡端上；所述加载端连接法兰与加载端传动轴固定连接,所述平衡端连接法兰与平衡端传动轴固定连接,所述加载端传动轴与平衡端传动轴之间固定连接被校扭矩传感器,并安置在温控箱中；所述加载端连接法兰与加载端传动轴之间固定连接加载端隔热垫圈和加载端隔热盘；所述平衡端连接法兰与平衡端传动轴之间固定连接平衡端隔热垫圈与平衡端隔热盘；所述加载端传动轴上固定加载端散热环,所述平衡端传动轴上固定连接平衡端散热环,从而实现变温环境下的扭矩校准。(The invention relates to a torque calibration connecting system in a variable temperature environment, which comprises a loading end connecting flange, a loading end transmission shaft, a temperature control box, a calibrated torque sensor, a balance end transmission shaft and a balance end connecting flange, wherein the loading end connecting flange is arranged on the loading end; the loading end connecting flange and the balance end connecting flange are fixedly connected to the loading end and the balance end respectively; the loading end connecting flange is fixedly connected with the loading end transmission shaft, the balance end connecting flange is fixedly connected with the balance end transmission shaft, and the loading end transmission shaft and the balance end transmission shaft are fixedly connected with a torque-corrected sensor and are arranged in the temperature control box; a loading end heat insulation gasket and a loading end heat insulation disc are fixedly connected between the loading end connecting flange and the loading end transmission shaft; a balance end heat insulation gasket and a balance end heat insulation disc are fixedly connected between the balance end connecting flange and the balance end transmission shaft; the loading end transmission shaft is fixedly provided with a loading end heat dissipation ring, and the balance end transmission shaft is fixedly connected with a balance end heat dissipation ring, so that torque calibration under a variable temperature environment is realized.)

1. The utility model provides a moment of torsion calibration connected system under alternating temperature environment, includes loading end flange (1), loading end transmission shaft (4), temperature control box (6), by school torque sensor (7), balanced end transmission shaft (9), balanced end flange (12), its characterized in that: the loading end connecting flange (1) and the balance end connecting flange (12) are respectively and fixedly connected to the loading end and the balance end; the loading end connecting flange is fixedly connected with the loading end transmission shaft (4), the balance end connecting flange (12) is fixedly connected with the balance end transmission shaft (9), and the loading end transmission shaft (4) is fixedly connected with the balance end transmission shaft (9) and is provided with a torque calibrating sensor (7) and arranged in the temperature control box (6); a loading end heat insulation gasket (2) and a loading end heat insulation disc (3) are fixedly connected between the loading end connecting flange (1) and the loading end transmission shaft (4); a balance end heat insulation gasket (11) and a balance end heat insulation disc (10) are fixedly connected between the balance end connecting flange (12) and the balance end transmission shaft (9); and a loading end heat dissipation ring (5) is fixed on the loading end transmission shaft (4), and a balance end heat dissipation ring (8) is fixedly connected on the balance end transmission shaft (9), so that the torque calibration under the variable temperature environment is realized.

2. The variable temperature environment torque calibration connection system of claim 1, wherein: the loading end radiating ring (5) and the balance end radiating ring (9) are made of 6061 aluminum alloy, 12 blades are uniformly distributed on the middle ring, and the thickness of each blade is 2 mm.

3. The variable temperature environment torque calibration connection system of claim 1, wherein: the loading end heat insulation disc (3) and the balance end heat insulation disc (10) are made of tetrafluoroethylene, so that heat transfer is facilitated, and the influence of temperature change of the temperature box (6) on torque transfer is reduced.

4. The variable temperature environment torque calibration connection system of claim 1, wherein: the loading end transmission shaft (4) and the balance end transmission shaft (9) are made of 42CrMo and are hollow shafts, and the ratio of the inner diameter to the outer diameter is 1: 2.5.

5. The variable temperature environment torque calibration connection system of claim 1, wherein: the temperature control box (6) has the temperature range of-50 ℃ to 100 ℃, the uniformity of +/-2 ℃, the fluctuation degree of 1 ℃/2 hours and the loading range of 10Nm to 5 kNm.

6. The variable temperature environment torque calibration connection system according to any one of claims 1 to 5, wherein: when the torque of the torque calibration sensor (7) is calibrated, the loading end applies torque, the torque is transmitted to the balance end through the loading end transmission shaft (4) and the balance end transmission shaft (9), the temperature of the temperature box (6) changes within minus 50-100 ℃, the temperature change is transmitted to the loading end and the balance end through the loading end transmission shaft (4) and the balance end transmission shaft (9), and heat is dissipated through the loading end heat dissipation ring (5) and the balance end heat dissipation ring (8).

Technical Field

The invention relates to a torque calibration system, in particular to a torque calibration connection system in a temperature-changing environment.

Background

With the rapid development of the scientific and technological industry in China, power systems of systems such as engines, diesel engines, gas turbines, fuel pumps and the like of aviation, aerospace, ships and the like and test systems of test beds of the systems put urgent demands on torque field and original taste calibration and measurement. The torque sensor is used as a precise measuring instrument for measuring torque, rotating speed and power, and is widely applied to an industrial power system shafting.

However, the environmental conditions of the test site of the industrial power system are severe, and the extreme temperature can reach-50 ℃ to 100 ℃. Typically, the calibration of the torque sensor is performed in a laboratory environment at a temperature in the range of (20 ± 5) ° c. The temperature is an important environmental parameter influencing the physical characteristics of the sensor material, when the environmental temperature changes, the material characteristics of an elastic sensitive element of the torque sensor and the heat output characteristics of a strain gauge alloy material obviously change, and the material characteristics of the sensitive element and the heat output characteristics of the strain gauge alloy material are the largest error sources of torque static measurement. The output value of the torque sensor changes due to temperature changes, so that the measurement accuracy of the sensor at the actual use temperature is difficult to ensure by a calibration method at the laboratory temperature, and measurement errors are caused. The torque calibration connection system in the variable temperature environment can solve the problem of accuracy of torque calibration at different temperatures, improves the reliability of torque calibration data, and has great popularization and application values.

Disclosure of Invention

The invention aims to solve the problem of accuracy of torque calibration at different temperatures and improve the reliability of shafting torque measurement, and provides a torque calibration connection system in a variable temperature environment.

In order to achieve the purpose, the technical scheme of the invention is as follows: a torque calibration connecting system in a variable temperature environment comprises a loading end connecting flange, a loading end transmission shaft, a temperature control box, a calibrated torque sensor, a balance end transmission shaft and a balance end connecting flange, wherein the loading end connecting flange and the balance end connecting flange are fixedly connected to a loading end and a balance end respectively; the loading end connecting flange is fixedly connected with the loading end transmission shaft, the balance end connecting flange is fixedly connected with the balance end transmission shaft, and the loading end transmission shaft and the balance end transmission shaft are fixedly connected with a torque-corrected sensor and are arranged in the temperature control box; a loading end heat insulation gasket and a loading end heat insulation disc are fixedly connected between the loading end connecting flange and the loading end transmission shaft; a balance end heat insulation gasket and a balance end heat insulation disc are fixedly connected between the balance end connecting flange and the balance end transmission shaft; the loading end transmission shaft is fixedly provided with a loading end heat dissipation ring, and the balance end transmission shaft is fixedly connected with a balance end heat dissipation ring, so that torque calibration under a variable temperature environment is realized.

Furthermore, 6061 aluminum alloy is adopted by the loading end radiating ring and the balance end radiating ring, 12 blades are uniformly distributed on the middle ring, and the thickness of each blade is 2 mm.

Furthermore, the material that loading end heat insulating disc and balance end heat insulating disc adopted tetrafluoroethylene is favorable to thermal transmission to reduce the temperature variation of temperature box and to the influence of moment of torsion transmission.

Furthermore, the loading end transmission shaft and the balance end transmission shaft are made of 42CrMo and are hollow shafts, and the ratio of the inner diameter to the outer diameter is 1: 2.5.

Furthermore, the temperature range of the temperature control box is-50-100 ℃, the uniformity is +/-2 ℃, the fluctuation degree is 1 ℃/2 hours, and the loading range is 10 Nm-5 kNm.

Further, when the torque sensor is calibrated, the loading end applies torque, the torque is transmitted to the balance end through the loading end transmission shaft and the balance end transmission shaft, the temperature of the temperature box changes within minus 50-100 ℃, the temperature change is transmitted to the loading end and the balance end through the loading end transmission shaft and the balance end transmission shaft, and heat is dissipated through the loading end heat dissipation ring and the balance end heat dissipation ring.

The invention has the following effects:

1. the torque calibration connection system under the variable temperature environment has a stable and reliable structure;

2. the torque calibration connecting system in the variable temperature environment has good thermal insulation performance, and can effectively reduce the influence of temperature change on torque transmission.

Drawings

FIG. 1 is a front view of a torque-calibrated connection system in a variable temperature environment of the present invention;

FIG. 2 is a front view of a load side heat sink ring and a balance side heat sink ring;

FIG. 3 is a front view of a loading end drive shaft and a balancing end drive shaft;

in the figure, 1, a loading end connecting flange, 2, a loading end heat insulation gasket, 3, a loading end heat insulation disc, 4, a loading end transmission shaft, 5, a loading end heat dissipation ring, 6, a temperature control box, 7, a calibrated torque sensor, 8, a balance end heat dissipation ring, 9, a balance end transmission shaft, 10, a balance end heat insulation disc, 11, a balance end heat insulation gasket, 12, a balance end connecting flange, 13, an M8 multiplied by 40 hexagon socket head cap screw, and 14, an M8 multiplied by 16 hexagon socket head cap screw.

Detailed Description

The invention is further illustrated by the following figures and examples.

As shown in fig. 1, the torque calibration connection system in variable temperature environment of the present invention includes a loading end connection flange 1, a loading end heat insulation washer 2, a loading end heat insulation disc 3, a loading end transmission shaft 4, a loading end heat dissipation ring 5, a temperature control box 6, a calibrated torque sensor 7, a balance end heat dissipation ring 8, a balance end transmission shaft 9, a balance end heat insulation disc 10, a balance end heat insulation washer 11, and a balance end connection flange 12. A loading end connecting flange 1 is fixed at a loading end through an M8X 16 hexagon socket head cap screw 14, a loading end heat insulation gasket 2 and a loading end heat insulation disc 3 are fixed between the loading end connecting flange 1 and a loading end transmission shaft 4, the loading end connecting flange 1 and the loading end transmission shaft 4 are connected through an M8X 40 hexagon socket head cap screw 13, a loading end heat dissipation ring 5 is fixed on the loading end transmission shaft 4, a torque correction sensor 7 is fixed between the loading end transmission shaft 4 and a balance end transmission shaft 9 and is arranged in a temperature control box 6, a balance end heat dissipation ring 8 is fixed on a balance end transmission shaft 9, a balance end heat insulation gasket 11 and a balance end heat insulation disc 10 are fixed between a balance end connecting flange 12 and a balance end transmission shaft 9, the balance end connecting flange 12 and the balance end transmission shaft 9 are connected through an M8X 40 hexagon socket head cap screw 13, the balance end connecting flange 12 is fixed at a balance end through an M8X 16 hexagon socket head cap screw 14, thereby realizing the torque calibration in the environment of variable temperature.

As shown in fig. 2, the loading end heat dissipation ring 5 and the balance end heat dissipation ring 9 are made of 6061 aluminum alloy, and 12 blades are uniformly distributed on the middle ring, and the thickness of each blade is (2 ± 0.1) mm;

as shown in fig. 3, the loading end transmission shaft 4 and the balance end transmission shaft 9 are made of 42CrMo and are hollow shafts, the ratio of the inner diameter to the outer diameter is 1:2.5, and deformation caused by temperature change is reduced;

during operation, the torque sensor 7 to be calibrated is installed in the temperature control box 6, torque is applied to the loading end, the torque is transmitted to the balance end through the loading end transmission shaft 4 and the balance end transmission shaft 9 through temperature, the temperature of the temperature box 6 changes within minus 50-100 ℃, the temperature change is transmitted to two ends through the loading end transmission shaft 4 and the balance end transmission shaft 9, the loading end heat dissipation ring 5 and the balance end heat dissipation ring 8 are favorable for heat dissipation, the loading end heat insulation disc 3 and the balance end heat insulation disc 10 are made of tetrafluoroethylene materials and are favorable for heat transmission, and therefore the influence of the temperature change of the temperature box 6 on torque transmission is reduced.

The temperature control box is used for realizing a temperature-changing environment, the deformation caused by temperature change is reduced by using the structure of the transmission shaft and other heat insulation materials such as tetrafluoroethylene and the like during working, the torque can be accurately transmitted after loading, the structure is firm, the reliability is high, and the operation is easy.