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The snow blower is more in demand by residents of regions where there is a large amount of rainfall. Factory-made units are expensive, so most craftsmen make them themselves. There is a wide variety of designs for such homemade products. The most common mechanisms are screw type. However, homemade rotary is no less popular. snow blower, in which the capture of snow occurs due to the fan blades.
Varieties of rotary snow blowers
The rotary snowplow is arranged quite simply. The unit consists of a round body - a snail. On top there is a sleeve for throwing snow. The guide vanes are welded to the front of the body. Inside the snail of the snow blower, the rotor rotates at high speeds. It consists of an impeller mounted on a shaft with bearings. The mechanism drives the engine. When the rotor of the snow blower begins to rotate, the impeller blades capture the snow, grind it inside the snail, and then throw it a few meters to the side through the sleeve.
Homemade rotary snow thrower can be made of two types:
- With a permanently installed motor. In this case, the snow blower works like a full-fledged machine.
- As a hitch for other equipment. The engine is not installed on such rotary homemade products. The snow blower is attached to a walk-behind tractor or a mini-tractor. The drive is carried out through a belt or chain drive.
Rotary snow blowers differ by engine type:
- Electric rotary models operate almost silently. They are easier to maintain and do not require any consumables. An inconvenience is the cable constantly dragging behind the snow blower. You can give preference to the battery model, but the operating time of such a unit is very limited. All electric snow blowers are low power. They are usually used in dachas and private yards to clean the paths from fresh loose snow.
- Gas powered rotary models are much more powerful than electric snow blowers. Their only drawback is in more complex engine maintenance, regular refueling of fuels and lubricants and the presence of exhaust gases. However, the petrol snow blower is not tied to an outlet. The power of the motor allows the manufacture of a large rotor mechanism. Such a rotary unit has an increased working width, is able to cope with thick snow cover and even snowdrifts.
By the type of movement, rotary snow blowers are:
- Non-self-propelled units move by pushing them by the operator. Electric snow blowers usually belong to this category, but there are also low-power gasoline models. The technique needs to be nudged slightly. Due to the capturing of the cover by the impeller, the snow blower itself will gradually move forward.
- Self-propelled cars most often run on a gasoline engine. The snow blower itself rides on wheels. The operator only gives him direction.
It is also reasonable to attribute the rotary snow plow to self-propelled equipment, although it does not even have a stationary drive. However, you do not need to push it with your hands. The hitch will move with the walk-behind tractor or mini-tractor.
Rotary snow blower drawings
Blueprints are required to properly assemble snow removal equipment. In the photo, we suggest that you familiarize yourself with the device of the simplest rotary snow blower.
The following scheme is more suitable for owners of a mini-tractor. The fact is that it is unreasonable to attach a rotary hitch to such a powerful technique.Most often, a combined mechanism is made for a mini-tractor. The hitch consists of an auger and a rotor. Such a snow blower will cope with large snow drifts.
In the combined snow blower, the snow is processed in two stages. The auger captures and grinds the cover, and the rotor mixes the loose mass with air and throws it out through the sleeve under strong pressure.
The principle of operation of the auger snowplow is presented in the video:
Self-made rotary snow blower
The process of making a rotary snow blower with your own hands can be conditionally divided into the following steps:
- frame assembly;
- manufacturing of a rotary mechanism;
- casing welding - snails.
If the snow-clearing structure is not a hinge for other equipment, then the craftsman has one more action - the installation of the motor.
When determining the size of a rotary snow blower, it is optimal to stop at such parameters so that the working width is within 48–50 cm. The design of the snow blower is not bulky, but efficient. With such a snowplow, you can quickly clear the area adjacent to the house, the yard and paths in the garden.
Assembling the frame of a rotary snow blower
The frame serves as a base for the snowplow. All working bodies are fixed on it. In general terms, the snow blower frame is a rectangular structure welded from corners and a profile. It is not possible to give clear instructions for its manufacture, because everything will depend on the spare parts used. Let's say you can take the motor from a chainsaw, cultivator, or, in general, put an electric motor. For each unit, you will have to individually come up with a mount. If the rotary snow blower is used as a hitch for a walk-behind tractor, then the motor will not be installed. This means that the frame is made shorter so that there is enough space to fix only the rotor with the volute.
If the rotary machine is self-propelled, then a wheelset attachment point is provided on the frame. A non-self-propelled snow blower is easier to put on the skis. For this, fasteners are welded from the bottom of the frame, and wooden runners are fixed to them.
Assembling the snow blower rotor
The most difficult part of a snow blower is the rotor. The main requirement is for the impeller. It can have from two to five blades. But that's not the point. Their number depends on personal preference. The main thing is that each blade has the same mass. Otherwise, there will be an imbalance. During the rotation of the unbalanced impeller, the snow blower will toss in place from strong vibration.
If it is not possible to order the manufacture of a snow blower rotor, all the work will have to be done independently. The provided drawing can be used as a guide.
The process of self-manufacturing a rotor consists of the following steps:
- First you need to find the shaft. The impeller and bearings will be mounted on it. This part will only have to be turned on a lathe. There is no other way out, unless the farm has a shaft of a suitable size from other equipment. It should be borne in mind that in a self-made rotor of a snow blower, at least a small imbalance will certainly be. It is better to choose a shaft in thickness for large bearings. Vibration will break them less.
- The rotor impeller is made of metal with a thickness of 2-3 mm. First, a circle of the required diameter is drawn on the sheet. Usually they adhere to a size of 29–32 cm. The workpiece is cut with a grinder or a jigsaw. It is undesirable to use welding, as the metal will lead from heating.The cut disc is processed on a sharpener and file so that a perfectly even circle is obtained.
- A hole is drilled strictly in the center of the disk along the diameter of the shaft. The axis can simply be welded to the workpiece, but then the rotor will turn out to be non-separable. This will make it more difficult to repair it in the future. It is reasonable to cut a thread on the axle and clamp the disc with nuts.
- Now it's time to make the blades themselves. They are cut from similar metal. Ideally identical blanks should turn out. It is advisable to weigh each blade. The smaller the difference in grams, the weaker the vibration of the snow blower from the imbalance will be felt. Finished blades from the center of the disc to its edge are fixed at the same distance from each other.
This completes the blanks for the snow blower rotor. Now it remains to fit two bearings onto the shaft. They need a hub. It can be made from a piece of pipe of the appropriate diameter. Four lugs are welded to the hub. You can simply attach the finished flange with holes. At this point, the hub will be fixed to the back wall of the cochlea.
Making a snail
The shape of the casing of a rotary snow blower is a bit like a snail, which is why it was called that. To make it, you need a piece of pipe of a suitable diameter 15–20 cm long. One side of the ring is tightly welded with a sheet of metal. This will be the back wall of the volute, to which the rotor bearing hub is fixed. In front of the ring on the sides, two guide vanes are welded.
A hole is cut in the upper part of the ring and a branch pipe for the sleeve is welded. The front part of the snail must be closed by 1/3 so that the snow does not fly in front of the rotor, but is diverted through the sleeve. It is better to make the plug removable on hairpins. This design will make it easy to get to the impeller.
Now it remains to fix the rotor inside the casing. To do this, a hole for the shaft is drilled in the center of the rear wall of the volute. The rotor is put in place, pressing the bearing hub firmly against the casing. On the lugs of the flange, mark the location of the mounting holes. The rotor is removed from the casing, drilling is performed, after which the mechanism is put in place and the hub is bolted to the rear wall of the snail.
So, inside the round body, a protruding rotor shaft is obtained. An impeller is placed on it and carefully tightened with nuts. On the outside of the volute, there is a hub with bearings and a second protruding end of the shaft. A belt pulley is placed on it. If a chain drive is preferred, an asterisk from a moped is attached instead of a pulley.
The finished rotor mechanism is installed on the frame, after which they proceed to further complete the snow blower, depending on the selected model. That is, they put the motor or connect the hitch to the walk-behind tractor and equip the drive.
Conclusion
The advantage of a rotary homemade product is the ability to manufacture a snowplow with the required working width, as well as significant cost savings.
