The door closer is the device we often see on the fire exit door of the high-rise building. It can effectively ensure that the door is closed after opening. The door closer works well, so who knows the principle of the door closer? The following small series talk about the principle of the door closer!
Door closer concept
The door closer is a spring-like hydraulic device on the door. When the door is opened, it can be released by compression, and the door is automatically closed. It has the function of a spring door to ensure accurate and timely closing to the initial position after the door is opened. .
Door closer principle
When the door is opened, the door body drives the link to move, and the transmission gear rotates to drive the rack plunger to the right. The spring is compressed during the right shift of the plunger and the hydraulic oil in the right chamber is also pressurized. The one-way valve ball on the left side of the plunger is opened by the oil pressure, and the hydraulic oil in the right chamber flows through the one-way valve into the left chamber. When the door opening process is completed, since the spring is compressed during the opening process, the accumulated elastic potential energy is released, pushing the plunger to the left side, and driving the transmission gear and the door closer link to rotate, so that the door is closed.
The principle that the door closer allows the door to close slowly
During the release of the spring, since the hydraulic oil in the left chamber of the 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 passes through the small hole in the plunger and 2 The flow path with the throttle spool is returned to the right chamber. Therefore, the hydraulic oil forms a resistance to the release of the spring, that is, the damping effect is achieved by the throttling, and the speed at which the door is closed is controlled. The throttle valve on the valve body can be adjusted to control the variable closing speed of different stroke segments. Although the structure and size of the door closers produced by different manufacturers are different, the principle is the same.
Through this article, we have learned what is the principle of the door closer, the principle of the door closer and the principle that the door closer slowly closes the door. I believe that I have already understood the principle of the door closer. Let's talk about the next one. Closed door installation, please continue to pay attention to the hot security investment network.
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