The function and working principle of the door closer

The door closer can be adjusted to meet your individual needs. A fire door closer is mainly used in large public or commercial buildings to stop the spread of fire and water in the event of a fire, flood, or another disaster. Next, let's take a look at how the door closer works and how it works. Here are some answers.

Here is the content list:

l What does the door closer do?

l How the door closer works.

What does the door closer do?

The door closer is not only meant to close the door automatically, but also to protect the door frame and the door body (smooth closing), and more importantly, the hotel door closer has become an integral part of the intelligent management of modern buildings. The door closer is mainly used in commercial and public buildings, but also in homes. They have many uses, the main one being to allow doors to close by themselves to limit the spread of fire and ventilation in the building. The door closer types can be divided into external and internal top door closers, internal door closers, bottom door closers (floor springs), vertical door closers (built-in vertical door closers), and other types of door closers.

How the door closer works.

The working principle of the door closer is that when the door is opened, the door body drives the connecting rod and causes the drive gear to turn, driving the rack and pinion plunger to move to the right. In the process of the plunger moving to the right, the spring is compressed and the hydraulic oil in the right chamber is also compressed. The ball of the check valve on the left side of the plunger opens under the action of oil pressure, and the hydraulic oil in the right cavity flows into the left cavity through the check valve. When the door opening process is completed, as the spring is compressed during the opening process, the accumulated elastic potential energy is released and the plunger is pushed to the left, driving the drive gear and door closer linkage to rotate and close the door.

In the process of spring release, as the hydraulic oil in the left chamber of the office door closer is compressed, the check valve is closed and the hydraulic oil can only flow out through the gap between the housing and the plunger, and through the small hole in the plunger and the 2 flow channels equipped with throttle spool back to the right chamber. The hydraulic oil thus constitutes a resistance to the spring release. A cushioning effect is achieved by throttling, allowing the door to close at a controlled rate. The throttle valve on the valve body is adjustable to control the variable closing speed for different stroke sections. Although there are differences in the structure and dimensions of the door closer from different manufacturers, the principle is the same.

If you are interested in the metro door closer, you can contact us at /. We welcome your visit and look forward to cooperating with you. Our company adheres to the enterprise culture of "quality-oriented, customer first", and always strives to be a professional door closer supplier in the industry.