1. The working principle of the door closer
1. The basic components of the hydraulic door closer include supporting guides, transmission gears, return springs, one-way valves, rack plungers, throttle valve cores and housings, end covers, sealing rings and connecting rods. The shell and connecting rod play the role of fixing the door closer and connecting the door leaf and the door frame.
2. The working principle of the door closer is: when the door is opened, the door body drives the connecting rod to move, and makes the transmission gear rotate, driving the rack plunger to move to the right. When the plunger moves to the right, 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 effect 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 accumulated elastic potential energy is released, and the plunger is pushed to the left, driving the transmission gear and the door closer connecting rod to rotate, and the door is closed.
3. During the release process of the spring, because the hydraulic oil in the left chamber of the door closer is compressed, the one-way 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 on the plunger And 2 flow passages equipped with throttle spool return to the right chamber. Therefore, the hydraulic oil constitutes resistance to the release of the spring, that is, the effect of buffering is achieved through throttling, and the closing speed of the door 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.
2.Automatic Door Closer Installation Steps
3.the door closer, how to adjust the closing force?
Adjusting the closing force of the door closer means adjusting the closing speed. When the force is large, the speed is fast, and when the force is small, the closing speed of the door closer is slow.
The door closer adjusts the closing speed through two hydraulic valves to independently control the closing speed of the two-stage door closer for full-stage hydraulic control.
Adjust the closing speed of the door closer as required. Usually the door closer has 2 speed regulating (throttle spool) screws. The upper adjusting screw is the first stage door closing speed adjusting screw, and the lower adjusting screw is the second stage (usually 10º) door closing speed adjusting screw.
4. What should be paid attention to when using the door closer?
(1) The exterior-mounted top door closer is not suitable for two-way opening doors;
(2) The speed adjustment screw controls the opening and closing speed of the door. Clockwise rotation is slow, counterclockwise rotation is fast;
(3) The door closer should be filled with antifreeze oil after one year of use. When refueling, unscrew the oil hole screw to refuel, and tighten the screw after the oil is full
(4) The rest of the screws and sealing parts cannot be twisted at will to prevent oil leakage.
(5) After a period of operation of the hinge with added grease, the viscosity of the added grease decreases and it is easier to flow out. At the same time, the shaft core and reel of the hinge will be worn to varying degrees. When the wear is serious, more black iron powder will be produced, which will stain the grease black. Therefore, depending on the oil used and the processing accuracy of the hinge with grease, transparent or black grease will flow out sooner or later, which will affect the appearance to varying degrees.
Author:Written by Ms.Rebecca Fu from S4A INDUSTRIAL CO.,LIMITED
Factory Address:Building S4A, South Third Lane, Qiuyuling Street, Zhangkeng Village, Hengli Town, Dongguan City, Guangdong Province Office Address:#601,floor 6 ,building 1,JINFANGHUA industrial zone, Bantian St. Longgang Dist. Shenzhen, PRC.
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.