Types of
snow blowers All machines for manual snow removal have the same operating principle - first the snow is gripped, then it is thrown out through the trough from the clearing surface.
There are units of these types:
- Single-stage( screw) - both processes are carried out with the help of the rotary movement of the screw mechanism
- Two-stage( screw-rotor) - the snow is grasped by the auger mechanism, and the waste - through the blades of the special ejector impeller through the trough is due to workrotor.
Rotary screw device
Auger hand assemblies have a traditional screw shape, the edge of the working surface can be either smooth or crenellated. Smooth edges are used for harvesting a soft snow layer of low density, and relief ones for icy and caked crusts.
Rotor impellers on screw-rotary snow-scavers usually have 3 to 6 blades, which, depending on the load, are made of plastic or metal.
To prevent the failure of any part of the unit due to the ingress of large objects and particles, the auger and impeller are fixed to the shaft with shear bolts or pins, which allows them to break when the part is suddenly stopped. As a rule, it will help to save electric motors and other components, and it will not be difficult to replace the bolts.
Design features
The dimensions of the snow ladle bucket that surrounds the auger determine the amount of snow cover cleared by the machine. Accordingly, with the increase in bucket dimensions, the productivity and price of this model will increase.
There are skis on the sides of the scoop, which are directed by the snow-scraper. By adjusting the height to which they rise, you can achieve the required distance of the bucket from the surface of the coating. Also on its edge set scoring knives, which allow you to simplify the cleaning of caked layers.
You can get acquainted with the work of a hand-held snow-removing machine on this video.