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I. Product Introduction

The coupler buffer static pressure testing machine is mainly used for performance testing of rubber products such as coupler buffers. This testing machine adopts electro-hydraulic servo control and uses the lifting of the cylinder piston to achieve compression deformation of the specimen, meeting the TB/T 1961-2006 "Locomotive and Vehicle Buffer" standard. The maximum test force is 3000 kN, with an adjustable piston speed of 0–6 mm/s. The machine features a compact structure, enabling long-term high-precision load retention and the setting of complex compression test programs.

The working principle of the coupler buffer involves buffering through the compression of elastic elements, while utilizing friction and damping to absorb impact energy during the deformation of the elastic elements. Rubber coupler buffers exhibit nonlinear characteristics, meeting performance requirements under different impact speeds.

II. Functional Features

1. The main unit of the testing machine uses a microcomputer-controlled high-precision electro-hydraulic servo valve to drive a precision servo linear hydraulic cylinder, enabling automatic control in various modes such as constant rate test force, constant rate displacement, and constant rate deformation, meeting the assembly and static testing requirements of buffers.

2. The hydraulic system of the equipment allows continuous adjustment of pressure and displacement, and, combined with the electrical control system, processes pressure, displacement, and various alarm signals through programmable control systems to achieve overall machine control.

3. The machine features multiple intelligent safety protections, including upper beam position limits, piston displacement limits, hydraulic system overpressure, electrical system overcurrent, load overload, and software operation errors.

III. Main Technical Parameters

Maximum Test Force: 3000 kN

Overall Pressure Accuracy: Grade 0.5

Indication Repeatability: ≤0.5%

Displacement Accuracy: ≤±0.1 mm

Servo Cylinder Stroke: 350 mm adjustable

Maximum Opening Between Upper and Lower Pressure Plates: 700 mm adjustable

Pressure Holding Time: 0–10 s adjustable

Test Speed: 6 mm/s adjustable

Work Surface Area: 500 × 500 mm

Oil Pump Rated Flow: 30 L/min

Maximum Cylinder Pressure: 25 MPa

Motor Power: 15 kW, AC three-phase, 380 V

Loading Medium: No. 46 anti-wear hydraulic oil