The precautions for hydraulic elevators at different stages of use include installation and commissioning, daily operation, regular maintenance, troubleshooting, and long-term shutdown, as follows:

1、 Installation and debugging phase

environment check

Ensure a clean working environment for the hydraulic station and prevent dust and impurities from entering the system.

Check the oil level in the fuel tank, and add more fuel during the first test drive (as the components and pipelines are initially empty, the oil level will drop after filling).

Confirm that the suction and return pipes are inserted below the oil level to prevent air from entering the system.

component installation

Check whether all fastening bolts (including foundation bolts) are tightened to prevent loosening and leakage or vibration.

Ensure accurate and reliable installation of hydraulic motors and other components, secure connection of high-pressure hoses, and correct installation of O-rings.

Install safety valves and set pressure limits to prevent pipeline explosions caused by system overpressure.

Initial debugging

Before the first operation of the hydraulic motor, it is necessary to fill the housing with working oil and exhaust the air.

After initial operation and long-term parking, it should be run in and out for 1 hour under no-load conditions to check for temperature rise, leakage, vibration, and noise.

Adjust the pressure of the safety valve to the specified value (such as 20MPa) to ensure reliable braking performance.

2、 Daily operation phase

Pre operation inspection

Check the fuel gauge of the fuel tank, the oil level should be within the red range; Check for oil leakage in all areas.

Confirm that the brake is in the braking position and the inlet and outlet screw switches are open.

Check if safety devices such as depth indicator, pressure protection, and over roll protection are functioning properly.

Turn on the cooling water switch and ensure that the oil temperature meets the requirements (normal operating temperature 25-55 ℃, maximum not exceeding 70 ℃).

Monitoring during operation

Real time monitoring of oil pressure, motor and pump station operation, bearing temperature and other parameters.

Pay attention to the condition of the hydraulic oil. If the oil is found to be dirty or deteriorated, it should be filtered or replaced immediately.

Avoid overloading operation to prevent the motor from overheating or burning out.

Safety operation standards

Set the operating handle to zero position to ensure flexible movement.

The emergency brake switch should be sensitive and reliable, with a light foot pedal and the ability to reset automatically.

During the operation of the hydraulic motor, the inlet oil temperature should meet the usage requirements to avoid wear caused by low-temperature starting.

3、 Regular maintenance phase

Hydraulic system maintenance

Regularly clean the mesh filter, paper filter, and electro-hydraulic pressure regulating device filter element to avoid blockage by dirt.

Check the flexibility of the solenoid valve action, regularly tighten the installation screws to prevent loosening.

When replacing the oil pipe, acid washing treatment is required to avoid impurities contaminating the system.

Electrical system maintenance

Regularly check the status of electrical components (such as switches, circuit breakers, contactors) and replace aging components in a timely manner.

Clean electrical contact points, reduce contact resistance, and prevent excessive temperature rise.

Check the function of safety relays and interlock switches to ensure that the power can be quickly cut off in case of abnormalities.

Safety device inspection

Regularly test protective devices such as over winding and overspeed to ensure sensitivity and reliability.

Check the wear of the brake shoes and adjust or replace them promptly if the wear clearance exceeds the specified value.

Verify the stiffness of the brake spring assembly to ensure stable braking performance.

4、 Fault handling stage

Common troubleshooting

Oil leakage and unstable oil pressure: Check if the screws are loose, eliminate air or strengthen the filtering of the electro-hydraulic pressure regulating device.

Zero oil pressure: Check the rotation direction of the oil pump, whether the relief valve is stuck, and whether the suction port is blocked.

Excessive residual pressure: Adjust the distance between the baffle of the electro-hydraulic pressure regulating device or replace the throttle hole of the overflow valve.

Secondary brake oil pressure maintenance fault: Clean the overflow valve and adjust the opening of the one-way throttle stop valve.

Emergency response measures

When abnormal temperature rise, leakage, vibration or noise is detected, stop the vehicle immediately for inspection.

When hydraulic system failure causes brake failure, activate backup safety devices (such as repair guide columns, physical locking devices).

When the electrical system malfunctions, the power supply is cut off through a safety relay to prevent the accident from escalating.

5、 Long term disuse phase

Preparation before discontinuation

Shut down the hydraulic station and cut off the power to save energy and ensure equipment safety.

Drain the hydraulic system pressure to prevent the oil from settling or corroding due to prolonged standing.

Thoroughly clean the equipment to prevent dust accumulation from affecting its next use.

Maintenance during downtime

Regularly start the equipment to prevent parts from rusting or getting stuck.

Check the condition of the oil and replace it promptly if any deterioration is found.

Apply anti rust oil to exposed metal parts to extend their service life.

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