Principle and maintenance of hydraulic door closer

The principle of hydraulic door closer is to close the door by hydraulic pressure, and its maintenance includes replacing worn parts, cleaning regularly, fixing loose fasteners, adjusting pressure, abnormal noise and so on.

Hydraulic door closer is a common door control equipment, and its principle is to close the door by hydraulic pressure. When the door needs to be closed, a signal is sent to the hydraulic control system through the door control button or sensor, and the hydraulic pump starts to work to pump liquid from the hydraulic pump. The liquid enters the hydraulic cylinder after being adjusted by the hydraulic valve, and the hydraulic cylinder begins to contract, generating a certain thrust. This thrust is transmitted to the door body through the door control, so that the door body begins to close.

Maintenance of hydraulic door closers includes timely replacement of worn or aging seals, regular inspection of the liquid level and oil quality of hydraulic door closers, regular cleaning of hydraulic door closers to ensure smooth oil passages and pistons, and regular inspection of whether fasteners of hydraulic door closers are loose. In addition, it is also necessary to regularly check whether the pressure of the hydraulic door closer is normal, whether the hydraulic door closer rises and falls normally, and whether there is abnormal sound.

Characteristics of hydraulic door closers

1, stable performance: general door closers are prone to oil leakage, which reduces mechanical performance and shortens service life. Hydraulic closed hinge never leaks oil and its performance is stable and reliable.

2. Beautiful installation: The external door closer is installed above the door leaf and door frame only after ordinary hinges are installed, so it is difficult to accurately place, debug and install, and the installation process is relatively difficult, which affects the overall beauty of the door and is destructive to the door. Hydraulic closing hinge is no different from ordinary hinge installation, which is convenient to install, does not damage the door, and is beautiful and generous.

3. The door closing speed can be adjusted at will: generally, the door closers need to be adjusted at the heads of two screws, which is difficult to control. The hydraulic door closing hinge can adjust the speed of automatic door closing only by slightly adjusting a screw head.