The working principle and types of door closers
The working principle of the door closer is when the door is opened, the door body drives the connecting rod to move, making the transmission gear rotate, and drives the rack plunger to move to the right. During the right movement of the plunger, the spring is compressed, and the hydraulic oil in the right chamber is also compressed. The one-way valve ball on the left side of the plunger is opened under the action of oil pressure, and the hydraulic oil in the right cavity flows into the left cavity through the one-way valve. When the door opening process is completed, since the spring is compressed during the opening process, the accumulated elastic potential energy is released, and the plunger is pushed to the left to drive the transmission gear and the door closer connecting rod to rotate, so that the door is closed.
During the spring release process, due to the compression of the hydraulic oil in the left chamber of the door closer, the one-way valve is closed, and the hydraulic oil can only flow out through the gap between the casing and the plunger, and pass through the small hole on the plunger and the 2 The flow passage equipped with the throttle spool returns to the right chamber. Therefore, the hydraulic oil constitutes a resistance to the release of the spring, that is, the buffering effect is achieved through throttling, and the speed of the door closing is controlled. The throttle valve on the valve body can be adjusted to control the variable closing speed of different stroke sections. Although the structure and size of door closers produced by different manufacturers are different, the principle is the same.
The types of door closers can be divided into: surface mounted and built-in top door closers, built-in door middle door closers, door bottom door closers (floor springs), vertical door closers (built-in automatic reset hinges) ) and other types of door closers.
How to adjust the door closer - how to adjust the speed of the door closer
In fact, the power adjustment of the door closer described above is directly related to the closing speed of the door closer. Generally, if the closing force of the door closer is relatively large, the closing speed will be faster; if the closing force of the door closer is small, the closing speed will be slower. Therefore, the speed regulation of the door closer is similar to the force regulation. However, some door closers have screws that directly control the speed, so it needs to be adjusted according to the strength and speed. In the case that the door closer has been adjusted to the appropriate force, if you want to adjust the speed of the door closer, you can first find the screw that adjusts the speed, and then see the size indication of the door closing speed adjustment valve. If there are elderly people or children who need to slow down the closing speed, turn the screw to the side that slows down the speed; if the closing speed is too slow and the door cannot be closed in time, then turn the screw to the side that speeds up the closing speed. . However, people with less experience in decoration can try several times when adjusting the speed of the door closer, and finally determine the speed of the lower door closer.
Post time: Jun-08-2020