Determination method of screw jack model
How to determine the type of screw lift is appropriate, the following Wanxin drive to tell you about: First, we must first calculate the equivalent load of the switchboard, ws = maximum load multiplied by the coefficient, a single computer equivalent load calculation formula, equivalent load =Ws/(using the number of units multiplied by the linkage coefficient fd), when the linkage is two, the use factor is 0.95, when the linkage is three, the use coefficient is 0.9, and when the linkage is four, the use factor is 0.85, even For 5-8 units, the coefficient of use is 0.8. Then the model of the lift can be provisionally taken into consideration. The model can be selected temporarily after fully considering the download weight, stroke, speed, and efficiency.
First, check the stroke, the selected stroke in the use of the trip, leaving a margin, while taking full account of the output screw is not dust-proof bellows, screw shaft movement inertia, a variety of top output components and so on.
Secondly, check the stability of the lead screw. When the lead screw bears the axial compression load, please perform a stability test. For details, please refer to the stability test. If the critical load value is exceeded, increase the model number. Recalculate.
The third is the input power check, and the required input power of the load is compared with the maximum input power of Xurong. If it exceeds, the model number is provided or the screw shaft speed is reduced. Other items that need to be checked are: 1. When the selected type is the active nut type, verify the rotation speed of the screw shaft. 2. When there is lateral load, be sure to add the guide. 3. When the elevator drives are configured in series, that is, two or more elevators are arranged on the same axis, the strength of the elevator input shafts needs to be checked. Finally, the top of the output and additional components should be confirmed, according to the use of conditions and the number of dust to select the dust pan, and then according to the output of the top of the connection to select the various output parts and counters and so on.