The formula you provided is not the typical expression for efficiency in the context of a machine overhaul. However, I can help clarify the relationship between load, velocity ratio, resistance, and efficiency.
Efficiency in the context of machines is usually defined as the ratio of output power to input power. In the case of a machine overhaul, where load, velocity ratio, and resistance are involved, the efficiency can be expressed as follows:
Efficiency = (Output Power / Input Power) * 100
To understand the relationship between load, velocity ratio, resistance, and efficiency, we need to consider the components involved:
Load: The load represents the resistance or work performed by the machine. It can be expressed in terms of force, torque, or power, depending on the specific machine.
Velocity Ratio: The velocity ratio is a measure of the speed advantage or disadvantage gained by using the machine. It is typically defined as the ratio of the output velocity to the input velocity.
Resistance: The resistance is the opposing force or work that the machine needs to overcome to perform its intended task. It can be due to factors like friction, air resistance, or any other force that opposes the machine's motion.
In the formula you provided, efficiency = load / (velocity ratio + resistance), the denominator seems to be the sum of the velocity ratio and the resistance. This expression is not commonly used to calculate efficiency, but let's examine its components:
a. Load / velocity ratio: This term represents the input power required by the machine to overcome the load and achieve the desired output. It relates to the mechanical advantage gained by using the machine.
b. Resistance: This term represents the opposing forces or work that the machine needs to overcome. It acts as a hindrance to the machine's performance.
In this formulation, the efficiency is inversely related to the sum of the velocity ratio and resistance. A higher value for the sum of these two components would result in a lower efficiency. However, it's important to note that this formula may not accurately represent the true efficiency of a machine.
In general, to calculate the efficiency of a machine overhaul, you need to determine the actual input power (or energy) and output power (or energy) of the machine. Then, use the formula:
Efficiency = (Output Power / Input Power) * 100
This expression provides a more standard and accurate representation of efficiency, taking into account the actual power values rather than just the load, velocity ratio, and resistance.