First time using it on an excavator
In 1953, Germany introduced the first hydraulic excavator, and that's when Liebherr launched its very first fully hydraulic model. Switching from mechanical to hydraulic transmission was a game-changer in excavator technology. This move towards hydraulics marked the second generation of excavators and is often referred to as the "Transmission Revolution."
In 1953, Hans Liebherr was using a cable-operated excavator when he realized it had a poor power-to-weight ratio. Just eight months later, he came out with Europe's first hydraulic excavator, the L 300, which was four times lighter than the one he had rented. By 1954, the powerful new machine was in full-scale production.
Pascal's law
The liquid in a sealed container, if pressure is applied at any point, will be transmitted through the liquid to each connected vessel, and the pressure value will be equal everywhere. This is Pascal's law and the basic principle of hydraulic transmission. Simply put, when a pipe bursts, it is the area with the lowest explosive strength.
Determine the performance characteristics of hydraulic pumps
No matter what pressure it is, it refers to the force acting on a unit area. Hydraulic pressure generally has two ways of expression, one is megapascal (MPa) and the other is bar, with 1MPa=10bar. In the hydraulic industry, it is generally referred to as kilograms, which is an ancient and common saying that a pressure of 1kg is equal to 0.1MPa.
As ordinary practitioners, we can simply record it as 10 kilograms. A good understanding is that 1MPA is approximately equal to 10 kilograms per centimeter, and the mainstream excavator now is around 35MPA=35 kilograms. flow
Flow cross-section: The cross-section perpendicular to the direction of liquid flow is called a flow cross-section, also known as an overcurrent cross-section. Flow rate: The volume V of liquid flowing through a certain flow cross-section per unit time t is called flow rate Q. Formula: Q=V/t=v · A (A-flow cross-sectional area, v - average flow velocity), for example: 600L/min. Simply put, it means that the maximum amount of hydraulic oil that can flow out from the outlet of this pump per minute is its flow capacity. Quoted scenarios include engineering machinery, industrial equipment, agricultural machinery, shipbuilding, aerospace Wait.
