Related information about door closer

The door closer, also known as a hydraulic door closer, uses the directional flow of the liquid in the metro door closer?container to provide a cushioning effect, enabling the door to be closed automatically under the action of the hydraulic pressure after the door has been opened. Next, we will take a look at the door closer. Here are some answers.

Here is the content list:

l?The use and maintenance of the door closer and its repair.

l?The most critical quality issue of door closer is whether it leaks oil.

l?Reasons for the reduction of the cushioning effect of the door closer.

The use and maintenance of the door closer and its repair.

The newly installed hotel door closer?should be checked for a week to about 10 days after use and all screws should be tightened once again. Use the hydraulic oil recommended by the manufacturer, for cold areas should use low condensation point hydraulic oil. The door closer should be checked regularly after it is put into use, check whether the installation screws are loose and lost, whether the connecting arm is rubbing against the door body or door frame, whether the door body is deformed and loose, the cushioning effect of closing the door, whether the supporting guide parts are leaking oil, etc. Usually, the following problems occur after the door closer?has been used for some time: firstly, the mounting screws are loose or missing, resulting in the door closer not being in the correct position and the connecting arm being damaged. Secondly, the cushioning effect when the door closer is closed becomes worse, resulting in a collision between the door and the door frame and deformation of the door body. Thirdly, from the structural point of view, the door closer?is a closed whole, and its quality cannot be seen from its appearance.

The most critical quality issue of door closer is whether it leaks oil.

The most critical quality issue of door closer?is whether it leaks because door closer relies on the throttling of fluid in its internal hydraulic system to achieve control of the closing process, oil leakage means the failure of the hydraulic system, so the hydraulic system is the only criterion to determine the service life of an office door closed. The main causes of oil leaks are the increase in clearance due to wear of the pinion bearing guides, the reduction of the sealing effect due to wear of the seals or the counterclockwise rotation of the throttle spool away from the valve body during the adjustment of the cushioning effect.

Reasons for the reduction of the cushioning effect of the door closer.

The reduction in the buffering effect of the door closer is caused by the entry of air due to oil leakage or by an increase in the clearance between the guiding surface of the rack plunger and the valve body (throttling). Therefore, the quality and precision of the material, heat treatment, and machining of the pinion and supporting guide parts are very important. For the poor buffering effect of the school door closer, throttling alone by adjusting the throttle spool is not the fundamental solution. If the oil is leaking from the support guide, remove the support guide and check the condition of the seal, if it has been worn out or aged out, replace the seal. If the clearance between the supporting guide and the pinion shaft is too large, replace the supporting guide. If the rack plunger guiding plunger surface is worn and the clearance between it and the valve body is increased resulting in a reduced throttling effect, the rack plunger can be removed and repaired by surface chrome plating. In addition, the use of a softer spring is a way of reducing the force of the door against the door frame when the cushioning effect is reduced.

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