Method for testing action rate of self-adjusting element of drilling PDC drill bit

• Main Authors: TIAN JINGYAN, WANG ZHAOHUI, PANG JIWEI, LI SHENG, GUO MINGBO, ZHANG DONG, LU HONGRONG
• Format: Patent
• Language: Chinese; English
• Published: 08.05.2020
• Subjects: MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention discloses a method for testing the action rate of a self-adjusting element of a drilling PDC drill bit, and the method comprises the steps: enabling the self-adjusting element to be installed on a support, and enabling the telescoping structure part of the self-adjusting element to be in contact with a sliding rod; rotating the cam, and when the cam moves to the maximum diameter position, allowing the telescopic structure of the self-adjusting element to retract to the shortest size; rotating the cam continuously, and executing popup action; in the popup process of the telescopicstructure of the self-adjusting element, allowing the two protruding parts of the shielding object sequentially to pass through the area between a photoelectric correlation switch emitter and a receiver, shielding light twice, triggering signals of the receiver to be transmitted into the timer during shielding, and using a timer to record time signals t1 and t2 twice; calculating a rate v througha formula v=S/(t2-t1) acc