What are some common problems with pressure testing machines?

As the application range of pressure testing machines becomes more and more extensive, more and more units use pressure testing machines. But after all, it is a machine, and the testing machine will also fail, especially as the pressure testing machine accumulates over time, there will be more and more failures.

1. The reason why the oil pump does not produce oil: there is air in the oil pump, the oil filter is blocked, it does not match the oil outlet valve seat, and there are scratches and burrs on the steel ball and ball seat. Elimination method: open the high-pressure outlet pipe joint of the oil pump for exhaust; Cleaning and exhausting the air in the oil pump; Replace or repair the corresponding parts.

2. The oil pump is unstable (the pointer can be seen to stagnate and reciprocating jitter). Causes: The viscosity of the oil is too small (too thin) or too dirty; There is air in the oil circuit; There is dirt or brushing between the piston of the oil supply valve and its bushing; There is an oil leak.

Exclusion method: replace the cleaning oil with suitable viscosity; Drain the air in the oil circuit, make the piston rise for a certain distance, and then open the oil return plug; cleaning and grinding brushed parts; Find out the oil leak and eliminate it.

3. Oil pressure pulsation (the oil return pipe of the oil supply valve, the oil return is intermittent, and the standard dynamometer pointer shakes when the load indication value is verified) Causes: there is air in the oil pump, the viscosity of the oil is too small (too thin), the throttle needle gap of the oil supply valve is too large, there are dirt in the oil pump, the oil outlet valve seat does not match, and the steel ball and ball seat have burr scratches. Exclusion Method:

Remove air, replace with suitable fluid, reduce throttle needle clearance, clean the oil pump, replace or repair parts.

4. The reasons why the oil pressure cannot hit the maximum load: the oil plug of the oil supply valve is too tight or there are dirty objects, the spring elasticity of the oil supply valve is too small, there is a large oil leakage, the front end of the piston of the oil supply valve is leaking, the oil pipe joint is leaking, the working piston gap is too large, and the oil return valve needle valve is not consistent. Exclusion Method:

Clean or grind the corresponding parts, add washers or replace springs on the end face of the spring, eliminate oil leakage, tighten the screw sleeve, tighten after replacing the washer, slightly increase the oil viscosity or replace the piston, and grind the oil return valve.

5. The pointer does not return to zero after unloading: the rack is stuck; The pendulum falls back too quickly and the rack jumps out of the roller. Elimination method: adjust the spring blade, re-engage the rack, and rotate the rack to zero.

6. Start the oil pump, and the pointer swings back and forth after workReason: the lower end of the force measuring piston is not aligned with the position of the jack block. Exclusion method: Correct position.

7. The reason why the bursting sound of the specimen is too large when it is broken: the gap between the cylinders is too large and the piston rises too high. Exclusion method: add a cushion block to reduce the rising height of the working piston.

A pressure testing machine is a type of testing machine that mainly tests the pressure of the specimen to understand the pressure range that the specimen material can withstand. Many people don't understand the pressure testing machine, especially the precautions for use, and don't know how to use it correctly. If the pressure tester is not used correctly, the final measurement data will be affected, and accurate pressure data will not be obtained.

Unlike other testing machines, pressure testing machines mainly use the principles of physics and mechanics to measure the maximum pressure on the material. Let's take a look at what needs to be paid attention to when using a pressure testing machine. One.

The selection of materials, before testing, in addition to the need to pay attention to the problem of equipment, but also pay attention to the selection of materials, only by choosing the right materials, can we test accurate data. There are limitations to the materials tested by the testing machine, and the main measurement is metallic and non-metallic materials, so it is important to pay attention to the selection of materials. Two.

After the equipment is used, the position of each part of the parts may not be standard, or there is a problem with one part of the equipment, which will lead to problems in the measurement of the equipment. Three. When the standard line is placed, the testing machine should pay attention to the problem of the standard line when measuring the sample, so as to ensure the accuracy of the measurement.

If the place where the standard line is placed is not standard, it will definitely affect the measurement. Four. Avoid adjustment, the testing machine in the measurement process, do not adjust at will, because the equipment is already working, if the arbitrary adjustment will affect the measurement results of the equipment, but also may lead to equipment obstacles, resulting in the test can not be carried out smoothly, so pay attention to the equipment can not be adjusted at will.

The above are the problems that need to be paid attention to in the use of pressure testing machines. It seems to be a simple problem, but it cannot be taken into account in the actual process, resulting in inaccurate test results. Why do I have to take multiple measurements when measuring a specimen?

It's about ensuring the accuracy of the data. If it is not measured several times, the conclusions drawn must not be accurate data.

Problem 1: The pointer can be seen to stagnate and reciprocate, and the oil pump is unstable.

Solution: Check whether there is oil leakage in the testing machine, find out the oil leakage and eliminate it. If the viscosity of the oil is too thin or too dirty, replace it with a clean oil of the appropriate viscosity. There is air in the oil circuit, and the air in the oil circuit is discharged.

Problem 2: The oil return pipe of the oil supply valve is intermittent, and the pointer of the standard force tester shakes when the load indication is verified.

Problem 3: The oil pressure cannot hit the maximum load, and the oil plug of the oil supply valve and its sleeve are too tight or dirty.

Solution: The spring force of the oil supply valve is too small. There is a large oil spill.

Oil leaking at the front end of the piston of the oil supply valve. Oil leakage from tubing joints. The working piston clearance is too large.

The return valve pin valve does not fit. Wash or grind the corresponding parts. Add a washer to the spring end face or replace the spring.

Eliminate oil spills. Tighten the screw sleeve. Tighten after replacing the gasket.

Increase the oil viscosity slightly or replace the piston. Fit the oil return valve together.

Summary. Hello! The reasons for the uneven pressure value of the 2000 pressure testing machine are:

The size, shape, and surface quality of the specimen have a great impact on the test results, and if the specimen is not properly handled, or if there is no strict quality control during the test, it can lead to non-uniformity of the test results. When a pressure testing machine is used for a long time, it may cause problems such as loose jaws, jamming or damage, which can lead to deviations and non-uniformity of test data. Factors such as temperature, humidity, and vibration of the test environment also have a great impact on the test results.

For example, if the temperature of the test chamber is unstable or there is a lot of vibration during the test, it can cause the pressure tester to read unevenly. The choice of test method also has a great influence on the non-uniformity of the results. Different types of test methods are suitable for different materials and specimens, and need to be reasonably selected and applied according to specific test requirements.

Hello! The reason for the uneven pressure value of the 2000 pressure testing machine is that the size, shape and surface quality of the test mask leakage sample have a great impact on the test results, and if the sample is not properly treated, or there is no strict quality control during the test process, it will lead to the non-uniformity of the test results.

After a long period of use, the pressure testing machine may have problems such as loose jaws, jamming or damaged transportation, which will lead to deviations and non-uniformity of test data. Factors such as temperature, humidity, and vibration of the test environment also have a great impact on the test results. For example, if the temperature of the chamber is unstable or vibrates during the test, it can lead to uneven readings in the pressure testing machine.

The choice of test method also has a great influence on the non-uniformity of the results. Different types of test methods are suitable for different materials and specimens, and need to be reasonably selected and applied according to specific test requirements.

Hello, the pressure value of the 2000 pressure testing machine may be caused by a combination of factors, and it is necessary to analyze and diagnose according to the specific situation, and take reasonable solutions to the mountain lead comic liquid.

Hello dear, <>

<> 2000 pressure testing machine is a kind of equipment used to test the pressure performance of materials under force. When using the Model 2000 pressure testing machine, uneven pressure values can be caused by: Improper adjustment:

The pressure value of the testing machine can be affected by the adjustment mechanism, for example if the pressure of the adjustment nut is uneven or improper, which may lead to uneven distribution of the pressure value. Installation problems: If the machine is installed in an uneven position or on an uneven ground, it can cause the machine to be subjected to uneven surfaces, resulting in uneven pressure distribution.

Test sample issues: The geometry and dimensions of the material may affect the test results. If the shape or size of the test sample is not uniform, it may result in a different test result than the theoretical value.

Damage to mechanical components: If the mechanical components of the Model 2000 pressure tester are damaged or deteriorated, such as a damaged or failed load cell, this can lead to uneven pressure values. Improper test operation:

When performing the test, the correct steps should be followed. If the test is not performed properly, such as if the test cell is not placed properly or a non-uniform force is applied, it can lead to uneven pressure distribution.

The pressure testing machine, also known as the electronic pressure testing machine, is mainly suitable for testing various physical and mechanical properties of rubber, plastic plates, pipes, profiles, plastic films, wires and cables, waterproof membranes, metal wires, cartons and other materials.

Tianjin Metersi Testing Machine Factory is an enterprise integrating scientific research and development, processing and manufacturing, operation and distribution. The company's product pressure testing machine is mainly used for the compressive strength test of concrete, stone and other building materials and other materials. This machine adopts hydraulic loading and electronic force measurement; It has the functions of digital display of test force, loading speed, test force maintenance and so on.

The machine can also be equipped with a computer, which can be used for digital acquisition and processing, and can also directly print and store the test results.

1. Before use, it must be checked whether the oil in the oil storage tank is full and whether the oil pipe joint is loose to prevent oil leakage.

2. According to the requirements of the test piece, replace the required spring, and use a small spring in small tonnage to make the reading accurate.

3. Turn the handwheel and adjust the screw to the appropriate position.

4. Tighten the oil return valve.

5. Start the oil pump to adjust the oil supply valve to float the piston, correct the zero point of the pointer, turn the knurled nut, adjust the chord, and make the pointer coincide with the zero line of the dial.

6. Control the oil supply valve and load it at the required speed.