公开(公告)号：EP2502041A1

公开(公告)日：2012-09-26

申请号：EP10796448.8

申请日：2010-11-17

申请人： Crane Electronics Ltd

发明人： DUFFIN, Adrian James ,  BURTON, John Edward ,  EVERITT, Peter William ,  McDONALD, Neil ,  WILKINS, Andrew

IPC分类号： G01L3/14 ,  G01L5/00 ,  G01L5/24 ,  G01L25/00

CPC分类号： G01L3/1464 ,  G01L3/1457 ,  G01L5/0042 ,  G01L5/24 ,  G01L25/003

摘要： In a variable torque rate test joint, screw-threaded first and second elements (1, 4) are rotated relative to one another by a tool under test. At least one spring beam (8) is cantilevered over a pivot point (10) to exert an axial force between the first and second elements (1, 4) and the torque rate of the test joint can be varied by moving the pivot point (10) to change the axial force. The first element may be a shaft (1) that is fixed during testing and the second element is a nut (4) rotatably mounted on the shaft, whereby the element rotated by the tool has a minimal moment of inertia. Whichever of the first and second elements (1, 4) is held stationary during the test may be mounted in a hub (18) that is locked during the test but can be rotated at the end of the test to reset the test joint. Measurements may be made of the torque and the rotation angle to derive an actual torque rate of the joint, which allows correction of errors by moving the pivot point (10).

摘要翻译： 在可变转矩测试接头中，螺纹的第一和第二元件通过被测工具相对于彼此旋转。 至少一个弹簧梁悬挂在枢轴点上以在第一和第二元件之间施加轴向力，并且可以通过移动枢转点来改变轴向力来改变测试接头的扭矩速率。 第一元件可以是在测试期间被固定的轴，并且第二元件是可旋转地安装在轴上的螺母，由此由工具旋转的元件具有最小的惯性矩。 第一和第二元件中的哪一个在测试期间保持固定可以安装在在测试期间被锁定的轮毂中，但是可以在测试结束时旋转以复位测试接头。 可以测量扭矩和旋转角度以导出接头的实际扭矩率，这允许通过移动枢轴点来校正误差。