Electronic universal testing machine loading precautions

Electronic universal testing machine in the loading process will be a lot of problems, how to solve these problems?

1, severe oil system oil spills, oil system oil spill generally present buffer valve, return valve, valve, pump and piping connections, after tightening the screws can be padded. If the gasket is broken, it must be disassembled to convert new here. Gasket should be made of copper or aluminum alloy.

2, lack of fuel tank. Load to a certain load, to send the oil return pipe "puff", "puff" movement, and less oil, bubbles. When the load can no longer rise, the return pipe without oil flow. Cleaning method: refuel the test machine tank, until you see the oil level to see half of the oil window can be.

3, the oil pump does not compress the oil collector on the pump body. So each load can only reach a certain load, and the load can not rise, send oil valve back to the oil pipe outflow. Cleaning method: Use a wrench to tighten the screws on the rear of the pump. If still in doubt, remove the oil collector and add a washer between the oil collector and the pump body.

4, the working piston and the cylinder gap is too large, too much oil spill, you can see from the spill and other exports. The method is to thicken the viscosity of the oil, assuming it can not handle the problem, through the precision measurement, should be to the consumption of plant exchange piston and cylinder.

5, the viscosity of the oil is too low (when loading the oil return valve to the oil outflow). The general choice of medium viscosity mineral oil, non-water, acid and other mixtures, not composed at room temperature, not thickening, if necessary, available viscometer measurements. Assuming improper use of oil, the valve and the oil will clog, and can cause oscillation or pipeline leakage. Electronic universal testing machine should be the best instructions for oil.

6, the force measuring piston and force cylinder gap, hit high tonnage, you can see from the bottom of the force measuring cylinder. Normal circumstances can not see the drip or intermittent high-tonnage drip, assuming a linear outflow, indicating the force-measuring piston should be converted. When observing the oil leakage, pay attention to the difference between the oil leakage of the joint and the oil leakage of the cylinder plug, and do not draw the fault distinction because of mistake.

7, to send the valve piston and piston sleeve damage or spring softening. So that each loading can not change the load base, sending valve noise, when the load can no longer rise, send the oil valve back to the oil pipe large. Should be removed and lapped piston and piston sleeve, such as severe damage should be converted spring.

8, send the valve regulator spring stiffness or save the needle cavity is blocked. The main manifestation: Each load can only reach a certain load, when the load can no longer rise, the oil return pipe large. Cleaning method: conversion of the appropriate spring stiffness or clean the dirt.

9, to send the valve damping needle and damping hole clearance is too small. The main manifestation: Each load can only arrive at a certain load, when the load can no longer rise, the oil valve back to the oil pipe large. Cleaning method: Remove the damping needle, the file along the axis of the needle with a file properly filing part.

10, stock pump loose belt, there is the phenomenon of skidding. After loading to a load can not be increased, the oil valve back to the oil pipe out of the oil pump no operation sound. Cleaning method: Loosen the motor fixing screws, adjust the position, so that the belt taut, and then tighten the motor fixing screws. If the belt deformation is too large, you have to convert the new belt.

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