The simple working principle of the door closer is that there is a hydraulic device similar to a spring on the door head. When we open the door, the door closer can be compressed and released, and finally the door is automatically closed. Among them, the function of a spring is to ensure that our door can be returned to the closed state in a timely and accurate manner after it is opened.
The invention of the door closer
The door closer we are talking about before that we all called it hydraulic door closer, was created in the United States in the early twentieth century. The design core of the hydraulic door closer is to realize the control of the door and the door can be closed by itself, so as to limit the spread of the fire and the ventilation of the fire place.
What is the working principle of the door closer
The working principle of the door closer
When the door is opened, the door body drives the connecting rod and uses the rotation of the transmission gear to drive the rack column to move to the right. When the plunger moves to the right, it will be compressed by the spring, and the hydraulic oil in the right cavity will also be compressed at the same time. 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, because the spring is compressed during the opening process, the stored elasticity is bound to be released, pushing the plunger to the left, driving the transmission gear and the connecting rod of the door closer to rotate to close the door.
The working principle of the door closer mentioned above is a bit professional, but you should be able to understand it if you take a closer look. In addition, what are the accessories involved in the closure?
Support guide, transmission gear, return spring, one-way valve, rack plunger, shut-off valve and housing, end cover, sealing ring and connecting rod.