Related parameters of excavator
Operating weight is one of the three important parameters of excavator (engine power, bucket capacity and operating weight) 
The operating weight determines the level of excavator and determines the upper limit of excavating force of excavator.
Digging force ≦ m; Work weight
M: adhesion coefficient between ground and crawler
If the digging force exceeds this limit, in the case of backhoe, the excavator will slip and be pulled forward, which is very dangerous. In the case of shovel, the excavator will slide backwards.
For the digging force, the digging force is mainly divided into the small arm digging force and the bucket digging force.
The two excavation forces are the tooth root of the bucket (the lip edge of the bucket), but the power is different. The scoop digging force comes from the bucket tank.
Scoop digging capacity (2 pieces)
The size of ground pressure determines the suitable ground conditions for excavators to work.
Ground pressure refers to the pressure caused by the weight of the machine on the ground, which is expressed by the following formula:
Earth specific pressure = working weight divided by the total area of contact with the ground
· it is important to install proper caterpillar board on the machine. For crawler excavators, the standard for choosing crawler is to use the narrowest crawler board whenever possible.
· common crawler types: toothed crawler board,
For crawler excavators, the walking time is about one tenth of the total working time.
Generally speaking, two speed can meet the walking performance of excavator.
Traction force refers to the force generated by the excavator when it walks, which mainly depends on the walking motor of the excavator.
These two walking performance parameters indicate the maneuverability and walking ability of excavator. In the sample of each manufacturer can be reflected.
The ability to climb is the ability to climb, descend, or stop on a solid, flat slope.
Two expressions: Angle, percentage
Ability to improve
Lifting capacity refers to the smaller of the rated stable lifting capacity or rated hydraulic lifting capacity.
Rated stability lifting capacity: 75% tilting load
Rated hydraulic lifting capacity: 87% hydraulic lifting capacity
The rotary speed refers to the average maximum speed that can be achieved when the excavator is idle.
This means that the defined rotary speed is neither the starting speed nor the braking speed. In other words, it's not the speed of acceleration or deceleration. For general excavation, the excavators in the range of 0 ° to 180 °, rotary motor acceleration and deceleration, when go to 270 ° to 360 °, the speed of rotation to be stable.
Therefore, in the actual excavation work, the rotary speed defined above is unrealistic. In other words, the actual rotary performance required is acceleration/deceleration in terms of rotary torque.
Gross horsepower is the output power measured on the engine's flywheel without expendable power accessories such as mufflers, fans, alternators, and air filters.
Effective power (net horsepower) refers to the containing all consumed power accessories, such as muffler, fan, alternator and under the condition of air filter, measured output power on the engine flywheel.
Measurement of noise
Excavator noise mainly comes from the engine.
Two kinds of noise: noise measurement in the operator's ear and noise measurement around the machine