The floor spring is a hydraulic door closer, except that the device that presses the spring is a worm gear rather than a rack and pinion. Because the worm gear can rotate in the forward and reverse directions, the floor spring can be used for two-way open doors, while the door closer can only be used for one-way open doors. The key to the ground spring is the load-bearing seat at the lower part of the spindle, which determines the load-bearing level of the ground spring. Because the floor spring used for bidirectional door opening has to carry the weight of the door body, the weight of the door body plays a decisive role in the selection of the floor spring compared to the door closer. In practical applications, the weight of the door leaf is generally not exceeded, so the choice of door width and wind pressure to the spring type is the preferred factor. Also pay attention to the aspect ratio, which is the ratio of height to width. If it is too disproportionate, the door leaf can't be used normally. From the perspective of production, the worm gear structure of the floor spring makes the compression degree of the spring smaller than that of the gear rack drive, and the force arm of the ground spring closes the door, so the quality of the ground spring depends on the structural design and machining accuracy. higher. In addition, since the two-way door opening door has a large force against the ground spring along the door leaf plane, the service life of the low-grade floor spring and the high-grade ground spring will be large.
Diffraction Grating,Diffraction Gratings,Grating Optics,Holographic diffraction grating, Holographic Grating Changchun Realpoo Photoelectric Co., Ltd. , https://www.optics-realpoo.com
