The damper manufacturer provides a standard damper

Automobile hydraulic shock absorber is a special shock absorber, which is widely used in automobiles, rail vehicles and other vehicles. The shock absorber dynamometer is the key equipment in the automotive shock absorber industry. So far, static calibration has been used to calibrate the test accuracy of the device. However, the actual operation of the dynamometer is a dynamic process. People have been looking for methods and means of dynamic calibration, but so far, no ideal methods and means have been found, so the dynamometer has been in the "static calibration" state for a long time. No one in the industry knows the dynamic accuracy of the dynamometer they use, except that a large number of test results on the production line are unreliable and unreliable. Therefore, the damper manufacturer provides an effective method and means to solve the dynamic calibration problem of the dynamometer.

Technical Element: In order to overcome the defect that the existing dynamometer cannot realize dynamic calibration, the damper manufacturer provides a standard damper. The performance data of the standard damper can be obtained through a test method with known errors and meeting the measurement transmission rules. Therefore, the standard damper can be used for dynamic calibration of the dynamometer on the production site, and has the advantages of simple structure, replaceable piston, convenient use, etc. The technical solution adopted by the damper manufacturer is: a standard shock absorber provided by the damper manufacturer, including a piston, a first piston rod, a second piston rod, a cylinder, a first guide, a second guide, and a first The sealing assembly, the second sealing assembly and the piston seal; the first piston rod is fixed to the second piston rod, and the piston is clamped between the first piston rod and the second piston rod; the first piston rod passes through the round hole of the first guide and the round hole of the first sealing assembly, the first piston rod and the circular hole of the first guide are in clearance fit relationship; the second piston rod passes through the circular hole of the second guide and the circular hole of the second sealing assembly in turn, and the second piston rod and the circular hole of the second guide are in clearance fit relationship; the annular groove of the piston is embedded with a piston seal, the outer surface of the piston seal and the inner surface of the cylinder form a sliding seal structure, and the piston is axially provided with at least one circular hole, the first guide and the first seal assembly are secured in the inner bore of the cylinder, and the second guide and the second seal assembly are secured in the inner bore of the cylinder. The piston and its piston seal, the first piston rod, the second piston rod, the cylinder, the first guide and its first sealing assembly, the second guide and its second sealing assembly are assembled into a first oil storage chamber and a second oil storage chamber. The first piston rod is a stepped shaft, m stud is arranged outside the d2 cylinder, the piston is sleeved on the D2 cylinder of the first piston rod, the M stud of the first piston rod can be screwed into the M screw hole of the second piston rod, and the piston is stuck between the first piston rod and the second piston rod; cylinder d1 of the first piston rod successively passes through the round hole of the first guide and the round hole of the first sealing assembly, cylinder d1 of the first piston rod and the round hole of the first guide are in clearance fit relationship; cylinder d3 of the second piston rod successively passes through the round hole of the second guide and the round hole of the second sealing assembly, the d3 cylinder of the second piston rod and the round hole of the second guide are in clearance fit relationship; The D1 of the first piston rod and the d3 of the second piston rod have the relationship of D1 = D3 . The two ends of the round hole on the piston are provided with tapered holes. The damper further includes a spacer sleeve and a threaded bottom. The threaded bottom is tightened, and the first guide and the first sealing assembly are pressed on the step of the stepped hole in the cylinder barrel through the spacer sleeve.

In summary, the beneficial effects of the dampers provided by the above-mentioned damper manufacturers are: the standard dampers provided by the damper manufacturers can be used for the dynamic calibration of the production site dynamometer, and have the advantages of simple structure, replaceable pistons, and convenient use.