Product Functions

This product is mainly used for testing and inspecting the mechanical properties, damping performance, and large deformation of plate rubber bearings, pot bearings, and spherical bearings used in highways, railways, bridges, and buildings. It can perform compressive modulus of elasticity tests, shear modulus of elasticity tests, shear tests (static shear), ultimate compressive strength tests, friction coefficient tests, rotation tests, and detect axial compression deformation and radial deformation under load tests for highway bridge pot bearings. Standards Applied:

GB/T2611-2007 General Technical Requirements for Testing Machines

GB/T16826-2008 Electro-hydraulic Servo Universal Testing Machine

JJG 139-1999 Verification Procedure for Tensile, Compression and Universal Testing Machines

GB/T 20688.4-2007 Rubber Bearings Part 4: Ordinary Rubber Bearings

TB/T 1893-2006 Plate Rubber Bearings for Railway Bridges

TB/T 2331-2004 Pot Rubber Bearings for Highway Bridges

JT/T 4-2004 Plate Rubber Bearings for Highway Bridges

JT 391-2009 Pot Rubber Bearings for Highway Bridges

GB/T 17955-2009 Technical Conditions for Spherical Bearings

Product Features

The main unit consists of a base, crossbeam, four columns, bidirectional working cylinder, dual flange sensors, upper pressure plate, upper pressure plate anti-rotation guide device, electric trolley-type lower pressure plate, front and rear fixed guide rail assemblies, and floating guide rail assemblies. The main hydraulic cylinder is a high-precision bidirectional hydraulic cylinder. The base and crossbeam are made of high-strength cast steel, and the four columns are made of No. 45 high-quality carbon steel, heat-treated to a hardness of HRC28-32, and mirror-polished after hard chrome plating. The product consists of a base, crossbeam, and four columns forming an integral frame structure. The crossbeam and four columns, and the base and four columns are connected by nuts and high-strength bolts, ensuring high strength, high rigidity, and self-supporting, gapless connection. The overall deformation is controlled at 0.3/1000, resulting in high overall rigidity, small deformation, and accurate and reliable measurement data. An electric trolley is mounted at the bottom of the lower pressure plate. After the sample is loaded onto the machine, the lower pressure plate is pushed into the test space via a motor drive. Once fixed in position, the pistons of four small hydraulic cylinders, controlled by a program, descend, causing the lower pressure plate to sit on the double-flange load sensor on the upper base, thus initiating the test.

The hydraulic cylinders employ a bidirectional servo actuation system. The piston's reciprocating motion is controlled by a hydraulic servo system. The cylinders utilize the most advanced composite sealing technology currently available internationally, incorporating two levels of oil seals and dustproof seals to ensure zero leakage during operation. The machine employs the following safety protection measures:

Automatic alarm and shutdown when the test force exceeds 5% of the maximum capacity;

Automatic alarm and shutdown when the piston displacement reaches its limit position;

Automatic shutdown during the test when the sample fails.

Traditional testing machines typically have a bottom-mounted hydraulic cylinder structure, using a worm gear to adjust the crossbeam's height to achieve compression space adjustment. This structure's transmission system is prone to wear and requires a floating cylinder locking device to eliminate the gap between the nut and the lead screw. The locking cylinder is installed inside the moving crossbeam. Due to frequent adjustments and operation, oil leakage is prone to occur when the seals age and the structure suffers severe wear. Furthermore, the laboratory environment makes repairing oil leaks difficult. Our company's new generation compression-shear testing machine adopts an upper-mounted bidirectional cylinder structure. The main unit uses this upper-mounted bidirectional cylinder system to adjust and test the entire compression space, completely avoiding the problems of the lower-mounted cylinder model. Moreover, with the upper-mounted cylinder design, the lower pressure plate is only about 1 meter from the ground, reducing the operating height by 0.6 meters compared to the lower-mounted cylinder model. This is more ergonomic, making sample loading and unloading and testing accessories very convenient, and effectively reducing foundation construction costs. To expand the testing range and perform single-shear tests on seismic isolation bearings and rigid bearings, reaction walls and long-distance bidirectional servo actuators can be installed on both sides of the main unit to achieve testing of all types of rubber bearings. The lower-mounted cylinder model cannot achieve this expansion functionality.

The forward, reverse, raising, and lowering operation buttons for the electric trolley are located on the control box, which is mounted on a side guide rail for easy operation.

The horizontal shearing system is equipped with a moving trolley and a servo floating cylinder at the bottom. During horizontal shearing, the servo floating cylinder automatically adjusts the vertical position of the horizontal hydraulic cylinder to ensure that the axis of the load sensor coincides with the axis of symmetry of the intermediate shear plate, thus ensuring the horizontal axial force on the sample. During the experiment, the reaction frame is supported on the upper and lower pressure plates. The horizontal shearing force on the sample is completely canceled out by the lateral force of the reaction frame on the upper and lower pressure plates, ensuring that the main unit, sensor, and working cylinder are not affected by the horizontal force. After the test is completed, the electric system pulls the entire shearing system out of the machine along the guide rail. The horizontal shearing system converts the horizontal thrust into horizontal tension through the reaction frame, enabling in-machine calibration.

The corner device is equipped with a corner beam and column for use during calibration. Calibration can be performed without disassembling the sensor, facilitating user operation and ensuring accuracy requirements.

The hydraulic cylinder piston system uses two step seals and two sets of guide rings to ensure that the hydraulic cylinder does not leak.

Compression test

Shear test

Corner test

The operating software of the microcomputer-controlled electro-hydraulic servo compression-shear testing machine based on the operating platform (hereinafter referred to as the compression-shear software) is a professional supporting measurement and control software for the series of microcomputer-controlled compression-shear testing machines. It is mainly used for testing the mechanical performance indicators of laminated rubber bearings, pot rubber bearings and spherical bearings. The compression-shear software is based on the following test standards: JT/T 4-2004 Laminated Rubber Bearings for Highway Bridges, JT/T 391-2009 Pot Bearings for Highway Bridges, GB/T 17955-2009 Technical Specifications for Spherical Bearings, TB/T 1893-2006 Laminated Rubber Bearings for Railway Bridges, TB/T 2331-2004 Pot Bearings for Railway Bridges, and GB 20688.4-2007 Rubber Bearings - Part 4: General Rubber Bearings.

The compression-shear software has a friendly interface, simple operation and flexible setting. It can automatically load continuously and smoothly, automatically hold the load, automatically collect, store and draw curves of test data, automatically generate and print test reports according to the test standards. The test data can be transferred and traced. It can complete the following various test types

Laminated Rubber Bearings

Compressive elastic modulus test;

Shear elastic modulus test;

Shear bonding performance test;

Shear aging test;

Friction coefficient test;

Rotation angle test;

Ultimate compressive strength test;

Pot Rubber Bearings

Friction coefficient test;

Rotation angle test;

Vertical bearing capacity test;

Spherical Bearings

Friction coefficient test;

Rotation angle test;

Vertical bearing capacity test;

Horizontal bearing capacity test;

Product Parameters

Product Configuration

Product Delivery Period: 25 working days after the contract takes effect

Product Warranty Period: 1 year after acceptance

Product After-sales Service

Send professional personnel to the site to debug the product for free and train the operators.

The free warranty period starts after the product is accepted. The free warranty period of the product is 1 year.

Provide lifelong maintenance services, and only charge for materials, labor, travel and cost fees.

Provide problem solutions on the same day; arrange to go to the user's site to solve problems within 24-72 hours if necessary.

Provide free software upgrade services for users.

User Preparation Requirements

It is required to clarify the detailed rules of the test method standards referred to in the test as much as possible.

Provide the specimens to be tested on this machine for product testing or factory inspection.

Be responsible for the receipt, storage and placement of the product.

Contact the local metrological department to calibrate the equipment (it is best to arrange the equipment calibration immediately after the installation and debugging are completed).

Provide the space, power supply (380V) and other conditions required for equipment installation.