How to distinguish between good and bad excavators, ah, there is nothing wrong with what
Engine powerTotal power (gross horsepower) refers to the output power measured on the engine flywheel without the power consumption of accessories such as mufflers, fans, alternators, and air filters.The effective power (net horsepower) is the output power measured on the flywheel of an engine when all the power consumption accessories such as muffler, fan, alternator and air filter are installed.Noise measurementThe main source of noise in an excavator is the engine.Two types of noise: noise in the operator's ear, and noise around the machine
The main problem is hydraulic, speak you master I am afraid you have to master, with a simple idle open action, walking and swing, do not believe the sound quality to the flat die head
Track plateIt is important to fit a suitable crawler plate into the machine. For crawler excavators, the standard for choosing tracks is to use the narrowest tracks whenever possible.Common track types: toothed crawler plates,Flat track plateWalking speedFor crawler excavators, walking time accounts for about 1/10 of the total working time.Generally speaking, the two speed can satisfy the walking performance of the excavator.Tractive forceTraction force refers to the force produced by excavators when they walk. It depends mainly on the motor of the excavator.The two walking performance parameters show the flexibility of the excavator walking and its walking ability. It can be shown in the samples of each manufacturer.Climbing abilityClimbing ability refers to the ability of climbing, downhill, or stopping on a firm, smooth slope.Two representations: angle, percentageLifting capacityLifting capacity refers to the rated stability of lifting capacity or rated hydraulic lifting capacity of the smaller one.Rated stability lifting capacity: 75% of tipping loadRated hydraulic lifting capacity: 87% hydraulic lifting capacitySlewing speedSlewing speed is the average maximum speed that can be reached when the excavator is idling.This means that the speed of rotation is defined not only when starting, but not at the speed of braking. That is, the speed of rotation is not the speed of acceleration or deceleration. For general excavation work, when the excavator works in the range of 0 degrees to 180 degrees, the rotary motor has acceleration or deceleration, and when turning to 270 degrees to 360 degrees, the speed of rotation is stable.Therefore, in actual excavation, the speed of rotation as defined above is unrealistic. That is, the actual rotary performance required is the acceleration / deceleration indicated by available rotational torque.
Excavator, also called excavating machinery, is a kind of earthmoving machine that uses bucket to excavate material that is higher than or lower than the machine surface and is loaded into transportation vehicle or unloaded to the stacker. Excavators are mainly made of soil, coal, sediment, and soil and rocks that have been pre - loosened. From the development of engineering machinery in recent years, the development of excavator is relatively fast, excavator has become one of the most important construction machinery in engineering construction. The three most important parameters of excavator are operation weight (quality), engine power and bucket bucket capacity.Correlation parameterOperating weightOperating weight is one of the three important parameters of excavator (engine power, bucket capacity, operating weight)Operating weight determines the level of excavator and determines the upper limit of excavator digging power.The digging force is less than or equal to m; weightM: adhesion coefficient between floor and trackIf the digging force exceeds this limit, the excavator will slip and be pulled forward in the case of the backhoe, which is very dangerous. In the case of a positive shovel, the excavator will skid backward.Digging forceFor digging force, the digging force is mainly divided into small arm digging force and bucket digging force.The digging points of the two digging forces are the root of the bucket (bucket side of the mouth), but the power is different. The small arm digging force comes from the small arm cylinder, and the bucket digging force comes from the bucket cylinder.Bucket digging force (2 pieces)Ground specific pressureThe ground pressure is decided by the size of ground pressure.Ground pressure refers to the weight of the machine to the ground, expressed in the following formula:Ground pressure = weight / total contact area with the ground
