Bevel gears are distinguished from other types of gears by having the axes of the two shafts cross at a 90-degree angle and conical tooth-bearing faces. The teeth themselves might be straight or in a spiral design. The bevel gear is developed for applications that require changing the rotational direction of a shaft, which has proven to be a beneficial function in a variety of industries. In this article, we’ll cover the industries that make the most use of bevel gears. However, we delve into that, let’s first get a better understanding of these gears.
What Is A Bevel Gear?
A bevel gear is a toothed rotating mechanical device that is used to transfer mechanical energy or shaft power between crossing shafts that are perpendicular or at an angle. As a result, the shaft power’s axis of rotation shifts. Aside from this purpose, bevel gears can also raise or reduce the torque while causing the angular speed to change in the opposite direction.
A bevel gear is represented by a truncated cone. Teeth are carved into its lateral side, which links with other gears with their own set of teeth. The gear that transmits shaft power is known as the driver gear, while the gear that receives power is known as the driven gear. To gain a mechanical advantage, the number of teeth on the driver and driven gears is frequently different. The gear ratio is the ratio of the number of teeth on the driven gear to the number of teeth on the driver gear, whereas the mechanical advantage is the ratio of the output torque to the input torque.
The Efficiency Of A Bevel Gear
The efficiency ratio is defined as the ratio of output power to input power. This is distinct from mechanical advantage, which is concerned with the amplification of forces or torques at the expense of speed. Loss of power during transmission in bevel gears is ascribed to friction caused by sliding between tooth surfaces and loads applied to the bearings or housing.
Types of Bevel Gears
Bevel gears are classified according to their tooth profile and orientation. More complex types, such as spiral and hypoid bevel gears, arose from advancements in manufacturing technologies like CNC machining.
This is the most basic type of bevel gear. When the gear is expanded, the teeth form a straight line that crosses at the axis of the gear. Because the teeth are tapered in thickness, the outside or heel part of the tooth is larger than the inner or toe part.
This is the most intricate type of bevel gear. In contrast to the teeth orientation of straight bevel gears, the teeth of spiral gears are curved and oblique. This causes increased tooth overlap, which facilitates progressive engagement and disengagement upon tooth contact.
This is a form of a bevel gear in which the shaft axes are not intersecting or parallel. The offset is the distance between the two gear axes. Hypoid bevel gears have helical teeth, comparable to spiral bevel gears. A hypoid bevel gear with no offset is nothing more than a spiral bevel gear. The fabrication and shaping of hypoid gears are comparable to those of spiral bevel gears.
This is a bevel gear with a 1:1 gear ratio, which means that the driver and driven gears have the same number of teeth. This type’s purpose is limited to shifting the axis of rotation. It generates no mechanical advantage. Miter gears often have axes that intersect perpendicularly. The shafts in some assemblies are oriented to intersect at any angle.
Industries That Often Use Bevel Gears
The Paper Industry
Paper is perhaps the most important material in daily life. It has a global market, so the paper industry is one of the most prosperous in the world. The paper industry employs a wide range of specialized machines, many of which rely heavily on gears for a variety of functions. There are many different types of gears used in the paper industry, with bevel gears being the most common.
Belt conveyors are the most common type of conveyor system. They are used to transport materials or products over flat or gently sloping terrain. Bevel gears, along with other types of gears, are used to power conveyor belt systems. Furthermore, the most common types of gearboxes used for chain conveyors are parallel shafts and bevel-helical gear shafts.
The Food Industry
In the food processing industry, bevel gears are widely used. The Food Processing Industry has made significant advances in the adoption of entire lines of gear assembly, which includes speed reducers, open gearing, couplings, and shafts, as technology has advanced. Furthermore, bevel gears are widely used in the beverage and confectionery industries, which are the two main components of the Food Processing Industry.
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