The hydraulic press is faulty and cannot hold pressure at 50

According to what you said, there may be several reasons:

1.How long does this process take? If it takes a certain amount of time to drop to zero, the biggest possibility is the oil string of the cylinder piston; If the handle becomes zero immediately - you need to determine whether the oil pump is still open, whether the direction of rotation of the oil pump is still correct, if the direction of rotation changes - you need to check the circuit, if the direction does not change - you need to check your two solenoid valves that control pressurization and pressure relief, it is likely that these two valves are the problem;

2.What components do you use to maintain pressure in the system, if it is a check valve, it is likely that the check valve is not closed tightly;

The hydraulic tension is far away from the diagram, so that everyone can discuss and discuss the problem more easily.

The above humble opinion.

Since there is a pressure holding function, there is a hydraulic check valve. Now the pressure can not be maintained: 1, the hydraulic check valve is broken. 2. The oil seal on the piston in the upper cylinder is broken. Netizens who are interested in hydraulics can 153320117

There are many reasons for not maintaining pressure, first check the check valve, whether the check valve is leaking; The sealing ring inside the master cylinder is leaking; If there is an overflow valve, there is a possibility that the overflow valve is leaking. When you make repairs, you start with simple actions.

The other one is not a pilot valve, it should be a relief valve, a remote pressure regulating relief valve. See if the state of the two relief valves is normal and whether the pressure can be regulated normally. It may be that the main relief valve is stuck, or it may be that the remote pressure regulating relief valve is broken.

Check the cylinder for leakage. Can QQ me, 86771311

It's okay to spend money to ask someone to solve it, hehe.

What is the reason why the hydraulic press motor cannot start?

1. Check if the insurance is burned.

2. Check whether the overload protector is overload protected.

3. Check whether the start switch or contact is broken.

4. Check whether the motor is burned out.

For details, please see: Reasons why the hydraulic press cannot start.

What do you mean by "pressure retention"?

In the hydraulic system, the cylinder needs to be paused at a certain time in the work and kept still, which is called pressure retention.

The condition for completing pressure holding is to have a solenoid reversing valve and hydraulic lock (hydraulic control check valve) with medium skills, and whether the system maintains pressure or not has nothing to do with the relief valve.

If the system does not maintain pressure, you first check whether there is a leak in the pipeline, if there is a leak in the pipeline, then when the pressure is maintained, there is no pressure, and the hydraulic cylinder will naturally not be able to maintain a non-moving state.

Then check the pump and hydraulic lock (hydraulic control check valve), the role of the hydraulic lock is to allow the oil to flow only in one direction, can not flow backwards, if the hydraulic lock is opened, let the oil flow backwards, the oil returns to the oil tank, the hydraulic cylinder, naturally or not to maintain pressure, (the hydraulic cylinder can only maintain pressure because the front and rear cavities of the cylinder are all closed, before the pressure is retained, if there is an oil port to return to the oil, it can not constitute the condition of pressure holding).

If you ask that the pressure cannot be adjusted, if the valve is new, take the valve apart and clean it, if the valve is long, it may be because the relief valve has been used for a long time, and the valve core inside has caused wear and tear, so you need to replace the valve.

Summary. The fundamental reason why the hydraulic press does not maintain pressure is because of the air leakage of the hydraulic press.

Hello. There are many reasons why the hydraulic press does not maintain pressure, and the hall wheel is dry first to check the check valve to see if the check valve is leaking; The sealing ring inside the main cylinder of the tung pin is leaking; If there is an overflow valve, there is a possibility that the overflow valve is leaking. Hope it helps.

They were all disassembled and cleaned, and there was no leakage.

The fundamental reason why the hydraulic press does not maintain pressure is because of the air leakage of the hydraulic press.

1) The leakage of the control valves of the hydraulic press, especially the leakage of the reversing valve that closely imitates the hydraulic cylinder, is the main reason for whether to maintain pressure; 2) The hydraulic cylinder of the hydraulic press has internal leakage and external leakage, which causes the equipment to be obstructed due to pressure retention. Both aspects can be examined.

Hope it helps.

The solenoid valve will not affect the non-pressure holding, and the short circuit of the line will not affect the non-pressure holding.

will affect.

Summary. Hello dear, <>

We are glad to answer the common faults and maintenance of hydraulic press 1, the failure of action may be caused by poor electrical wiring or wrong connection, check the electrical and repair. 2. The possibility of slider crawling is the accumulation of air in the system or the pump sucking out, improper precision adjustment or lack of oil in the column. During the inspection, first check whether the suction pipe of the pump is inlet for air, and then move up and down many times and pressurize; Then add oil to the column and readjust the accuracy.

3. The pressure of the slider is mainly caused by the excessive support force when the slider goes down slowly, and the upper cavity of the upper cylinder can be adjusted by adjusting the back pressure valve, and the maximum is not more than 1MPa.

Common faults and maintenance of hydraulic presses.

Hello dear, <>

We are glad to answer the common faults and maintenance of hydraulic press 1, the failure of the action may be caused by the electrical wiring is not firm or the wrong return of the banquet, check the electrical and repair. 2. The possibility of slider crawling is the accumulation of air in the system or the pump sucking out, improper precision adjustment or lack of oil in the column. When checking the hereditary, first check whether the suction pipe of the pump is intake, and then move up and down many times and pressurize; Then add oil to the column and readjust the accuracy.

3. The pressure of the slider is mainly caused by the excessive support force when the slider goes down slowly, and the upper cavity of the upper cylinder can be adjusted by adjusting the back pressure valve, and the maximum is not more than 1MPa.

Hello dear, <>

Here's what you can do: A hydraulic press is a machine that uses a liquid as the working medium for the cavity and is made according to Pascal's principle to transfer energy for the various processes of the Memmoth. The hydraulic press is generally composed of three parts: the machine, the dynamic bridge chaos system and the hydraulic control system.

Hydraulic presses are classified into valve hydraulic presses, liquid hydraulic presses, and engineering hydraulic presses.

Summary. Hello, I have seen your question and am sorting out the answer, please wait a while What is the reason for the failure of the hydraulic safety system of the injection molding machine.

Hello, I have seen your question and am sorting out the answer, please wait a while What is the reason for the failure of the hydraulic safety system of the injection molding machine.

The problem lies in the hydraulic oil, such as insufficient hydraulic oil, which contains impurities. Check that either you add hydraulic oil or change it. Injection Molding Machine:

Injection molding machine, also known as injection molding machine or injection machine. It is the main molding equipment for making thermoplastics or thermosetting plastics into plastic old grinding products of various shapes using plastic molding molds.

Hello, in the actual operation of the hydraulic press, the reasons for the pressure can not go up are common sense operation errors, the power of the hydraulic press is not enough to be thick, the hydraulic press is leaking, the hydraulic valve is broken or blocked, etc. If the power of the hydraulic press is not enough, either the hydraulic pump is lost, or the motor is aging, then you can put the palm of your hand on the outer wall of the oil inlet pipe to start the hydraulic press, if the suction is very large when the machine presses the workpiece, the hydraulic pump is fine, on the contrary, there is a problem with the limbs. If it is an oil leak from the hydraulic press, first carefully check whether there is obvious oil leakage on the surface of the machine, if not, the oil seal of the piston is damaged, this is put next to it, because unless it is really impossible to find a solution, the hydraulic cylinder will be removed to replace the sealing ring of the oil seal.

Hydraulic system failure, common faults and solutions: 1. No pressure or insufficient pressure Solutions: 1. Check the motor steering; 2. Replace the pump or key; 3. Clean and overhaul the relief valve; 4. Replace the spring; 5. Cleaning, training or replacement; 6. Check the wearing parts in the pump, cylinder and valve and the sealing of each connection of the system.

2. Solution to insufficient flow: 1. Check the motor steering and adjust the speed of the pump to meet the requirements; 2. Replace the oil suitable for viscosity; 3. Replenish the oil to the vernier place; 4. Replace the spring; 5. Increase the diameter of the suction pipe, increase the oil flow capacity of the suction filter, clean the filter screen, and check whether there is air entering; 6. Dismantle or replace relevant components; 7. Adjust or replace relevant components; 8. Check whether the pipeline connection is correct and whether the oil seal is reliable. Third, the system has vibration and noise solutions:

1. Tighten the connecting bolts of the pump and the nuts of each pipe of the pipeline or replace the sealing elements; 2. Repair or replace. 4. Solution to the increase of heating oil temperature in the system: 1. Appropriately increase the capacity of the fuel tank, replace or add a cooling device; 2. Choose a suitable oil with viscosity; 3. Improve the system design and re-select the circuit or hydraulic pump.

5. Air enters the oil solution: 1. Tighten the connections of each pipeline to prevent leakage; 2. The inlet and outlet pipes in the fuel tank should be kept at a certain distance as far as possible, and a partition can also be set to separate the inlet and outlet pipes; 3. Add enough oil, and keep the oil not lower than the oil mark indication line; 4. Adjust the sealing device, or replace the damaged seal; 5. To ensure that all parts of the system can be filled with oil frequently, a one-way valve should be installed at the outlet of the hydraulic pump, and a back pressure valve should be installed on the oil return road; 6. Remove the dirt attached to the oil filter; 7. Try to prevent the local pressure at each point of the system from being lower than the air separation pressure. 6. Solution to system overheating:

1. Use better quality oil; 2. Replace damaged parts in time; 3. Pay attention to the oil level in the container should not be too high; 4. When adjusting the oil return valve, attention should be paid to proper operation; 5. Don't make it work for a long time. Hope it helps.