US 12,345,624 B1
Piston pin hole friction and wear test and torque measurement device
Yi Cui, Shanghai (CN); Lining Gao, Shanghai (CN); Shuo Liu, Shanghai (CN); Yan Fu, Shanghai (CN); and Zhaohui Xu, Shanghai (CN)
Assigned to Shanhai Jiao Tong University, Shanghai (CN)
Filed by Shanghai Jiao Tong University, Shanghai (CN)
Filed on Dec. 19, 2024, as Appl. No. 18/987,397.
Claims priority of application No. 202410001402.7 (CN), filed on Jan. 2, 2024.
Int. Cl. G01N 19/02 (2006.01)
CPC G01N 19/02 (2013.01) 3 Claims
OG exemplary drawing
 
1. A piston pin hole friction and wear test and torque measurement device, characterized by comprising
a driving system, a loading system, a friction torque measurement system, an oil supply system, a T-slot table (9) and a support table (17); wherein
a bottom of the support table (17) is fixedly connected to a top of the T-slot table (9), and the friction torque measurement system comprises a total friction torque measurement device and a small head hole friction torque measurement device; and
the driving system comprises a rocker arm (4), an eccentric disc (5), a transmission shaft (6), a second bearing base (7), a flywheel (8), a first fixing bracket (10), a second fixing bracket (11), a first transmission gear (12), a synchronous belt (13), a driving motor (14), a second transmission gear (30), a first bearing base (31), wherein the driving motor (14) is fixed to the top of the T-slot table (9) by a fixing device, and a bottom of the first fixing bracket (10), a bottom of the second fixing bracket (11) are both fixedly connected to the T-slot table (9), and the first bearing base (31) and the second bearing base (7) are respectively mounted on a top of the first fixing bracket (10) and a top of the second fixing bracket (11), and the second transmission gear (30) is arranged at a middle position of the transmission shaft (6), and one end of the transmission shaft (6) connects to the flywheel (8) after passing through the first bearing base (31), while another end of the transmission shaft (6) connects to the eccentric disc (5) after passing through the second bearing base (7), and an output shaft of the eccentric disc (5) matches a driving groove at a bottom of the rocker arm (4), and the first transmission gear (12) is connected to an output shaft of the driving motor (14), and the first transmission gear (12) and the second transmission gear (30) are connected by the synchronous belt (13); and
the loading system comprises a fixing sleeve (23), a compensation arm (24), and a hydraulic cylinder (25), wherein a bottom of the fixing sleeve (23) is fixedly connected to a top of the supporting table (17), and a bottom of the hydraulic cylinder (25) is fixedly connected to a top of the compensation arm (24); and
the total friction torque measuring device comprises a torque sensor (1), a cantilever support bracket (3), a piston pin test piece (27), a piston test piece (28), a connecting rod test piece (29), wherein the cantilever support bracket (3) is fixedly connected to the fixing sleeve (23), and the piston pin test piece (27) is arranged in the piston test piece (28) after passing through a top circular hole of the connecting rod test piece (29), and a bottom of the torque sensor (1) is fixedly connected to a top of the cantilever support bracket (3), and an output shaft at one side of the torque sensor (1) is connected to a top of the rocker arm (4) through a flat key, an output shaft at another side is connected to the piston pin test piece (27), and the piston test piece (28) is arranged in the fixing sleeve (23), and a bottom of the compensation arm (24) is in direct contact with a top surface of the piston pin test piece (27); and
the small head hole friction torque measuring device comprises a support shaft (2), needle roller retainer assemblies (15), sensor mounting brackets (20), support shaft bases (21), and two-dimensional load sensors (22), wherein bottoms of two sensor mounting brackets (20) are fixedly connected to the top of the support table (17), and the needle roller retainer assemblies (15) are arranged on the top of the support table (17), and two support bases (21) are arranged respectively on two needle roller retainer assemblies (15), and two two-dimensional load sensors (22) are respectively arranged inside the two sensor mounting brackets (20), and the support shaft (2) passes through the two shaft support bases (21) and a bottom of the connecting rod test piece (29), and the two sensor mounting brackets (20), the two shaft support bases (21) are arranged respectively at two sides of the connecting rod test piece (29), and two ends of the support shaft (2) are respectively connected to the two two-dimensional load sensors (22); and
the oil supply system comprises an oil pump (16), an oil tank (18), and an oil delivery pipeline (19), wherein the oil pump (16) and the oil tank (18) are both fixedly arranged at the top of the T-slot table (9), and an oil inlet of the oil pump (16) is connected to the oil tank (18) through the oil delivery pipeline (19), while an oil outlet of the oil pump (16) is connected to an internal oil channel of the support shaft (2) through the oil delivery pipeline (19), and the internal oil channel of the support shaft (2) is connected to an oil channel of the connecting rod test piece (29).