Mada za sehemu hiiComplex MachinesMada 2
- Structure of complex machines
- Grain milling machine
A grain milling machine is used to grind various grains into flour. It is considered a complex machine as it is made up of multiple simple machines working together.
The grain milling machine consists of:
- Inclined Plane (Hopper): Where the grains are poured.
- Mill: The core part of the machine that grinds the grains.
- Flour Outlet: Where the flour is collected.
The structure of a grain milling machine
The milling machine uses three simple machines:
- Inclined Plane: Used for placing grains.
- Wheel and Axle: The mill itself uses a wheel and axle mechanism.
- Pulley System: A pulley system, composed of a wide belt and two wheels, rotates the mill. The large wheel is connected to the motor or engine, and the small wheel rotates the mill.
The grain milling machine may use fuel or electricity as a power source. A fuel engine converts fuel into mechanical energy, while an electrical motor converts electrical energy into mechanical energy.
When powered on, the motor or engine rotates the large wheel, causing the pulley system to turn the small wheel connected to the mill. This rotates the mill's roller, which grinds the grains. The mill is connected to a pipe that directs the flour, with a cloth at the pipe's end to prevent flour from dispersing.
- Temperature Management: Monitor the temperature of the machine, ensuring it doesn't exceed the specified limit. Turn off the machine if it overheats.
- Belt Maintenance: Ensure the belt is tight; if it's loose, tighten it to keep the machine working efficiently.
- Lubrication: Apply lubricants to the parts that rub together to prevent wear and overheating. Change the lubricants regularly.
- Repairs and Cleaning: Perform repairs when issues are detected, and clean the machine regularly for optimal performance.
A juice making machine, such as a blender or fruit squeezer, is used to grind or squeeze fruits, vegetables, or roots to produce juice. A blender is an example of a complex machine that helps in juice production.
The blender consists of:
- Motor: Located in the base of the blender, it converts electrical energy into mechanical energy.
- Axle: Connected to the motor and responsible for rotating the blades.
- Blades: Attached to the axle, the blades rotate like a fan to grind fruits or vegetables.

When turned on, the motor rotates the axle, which in turn rotates the blades at high speed. The blades crush and grind the fruits or vegetables, producing a thick liquid. Water is then added to the mixture, which is stirred and filtered to create juice.
Cleaning: Wipe the motor base with a cloth and soap. Do not immerse the motor in water to avoid damage. Detach and clean the other parts, such as the jug and blades, with soap and water. Be cautious when handling the blades as they are sharp. Clean them with a soft cloth and rinse with running water.
Storage: Store the blender in a safe place after cleaning to ensure its longevity and safe use.
Swali
Which of the following is NOT part of the structure of a grain milling machine?
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