The same tracked vehicle, why is the speed of a tank much higher than that of an excavator?

Because the tank coordinates the relationship between power and speed by switching gearsets through the gearbox, and the excavator walks by hydraulic drive, generally speaking, the hydraulic drive will be slower than the mechanical drive, so the speed of the tank is much higher than that of the excavator.

Anyone who knows about excavators knows that excavators rely on hydraulics to walk and work. One may ask why a tank can go so fast, while an excavator can only go slowly.

That's the difference between power take-off systems. The tank walked by mechanical and rigid connections. Just like the driving mode of a car, the relationship between power and speed is coordinated by the gearbox switching gear set, while the excavator is hydraulically driven.

It's not that hydraulic power is necessarily slower than mechanical transmission, but it's determined by the demands of the job. The so-called demand determines production. When the excavator moves, it does not need a high walking speed, but a lot of driving force.

Therefore, the excavator uses a plunger drive motor, which is hydraulic.

Hydraulic drive motors are generally divided into various forms such as gear type, vane type, and plunger type. Since the excavator uses the plunger type, today's gear type and vane type are not introduced. I hope to have a chance to discuss it with you in the future. <>

The younger brother is a loser. The following is a brief introduction to this plunger hydraulically driven motor. There are some drawbacks. Please criticize and correct!

Before that, I would like to explain to you that motors and pumps are reversible in principle, because they both work on the same principle, but in different directions of energy conversion. For example, the principle of electric motors and generators is electromagnetic induction. An electric motor converts electrical energy into mechanical energy, while a generator converts mechanical energy into electrical energy.

The hydraulic pump is a device that replaces mechanical energy with potential energy, and the hydraulic drive motor is a device that replaces potential energy with mechanical energy.

Piston hydraulic motors are divided into axial plunger type and radial piston type.

Radial plunger <>

Piston pumps. The working principle of the radial piston hydraulic motor, when the pressure oil enters the bottom of the plunger in the cylinder block through the window that fixes the oil distribution shaft, the plunger extends outward and fits closely with the inner wall of the stator, because there is an eccentric moment between the stator and the cylinder block. At the point of contact between the plunger and the stator, the stator has a reaction force on the plunger.

When the oil pressure acting on the bottom of the plunger is p, the diameter of the plunger is d, and the angle between the force and the is x, the force generates torque on the cylinder block, which rotates the cylinder block. The cylinder block then outputs torque and rotational speed outward through a drive shaft connected to the end face.

Axial plunger type.

The working principle of the axial piston motor is that the oil distribution plate and swash plate are fixed, and the motor shaft is connected with the cylinder block and rotates together. When the pressure oil enters the plunger hole of the cylinder through the window of the oil distribution plate, the plunger stretches out under the action of the pressure oil, and closely adheres to the swash plate to produce a normal reaction force on the plunger, which can be decomposed into axial components and vertical components. The vertical component is balanced with the hydraulic balance on the plunger, and the vertical component causes the plunger to generate torque towards the center of the cylinder block and drives the motor shaft to rotate counterclockwise.

The instantaneous total torque generated by the axial piston motor is pulsating. If you change the input direction of the motor pressure oil, the motor shaft rotates clockwise. The greater the inclination angle of the swash plate, the higher the torque and the lower the speed.

The same tracked vehicle, why is the speed of a tank much higher than that of an excavator?

Power determines speed, and the power of a tank is much greater than that of an excavator, a tank engine has several thousand horsepower, and an excavator has only a few hundred horsepower.

This question is very professional, but the two are used in different scenarios, the tank needs to maneuver on the battlefield and avoid artillery fire, so the speed requirements are relatively high, the excavator is used as a digging, there is a chassis counterweight, and the body is large and bulky, so the tank speed is much higher than that of the excavator.

The engine used in the tank was stronger and had more horsepower. The tank is used in warfare, and the technology it uses is far beyond the reach of civilian machinery such as excavators.

The power is strong, and the engine power is much greater than that of the excavator.

The transmission system is designed to take into account high and low speed and off-road ability, and the excavator transmission ratio cannot meet the high speed.

The same is a tracked vehicle, the engine power used in the tank will be greater, just like the comparison between a car and a motorcycle, the cylinders on the car are more than those of the motorcycle, and the car will be more powerful. It's the same thing.

Because the power of tanks and excavators is not the same, and the quality of their tracks is not the same, the speed will differ so much.

Mainly because the engine of the tank is full of power and needs to travel on the battlefield, while the excavator does not need it.

Mainly because they are used in different places, there will always be some differences in this speed, and it is impossible to achieve the same speed.

Because the functions of tanks and excavators are not the same, the design speed is very different, so the speed difference is so big.

The tank is directly driven by the gearbox, and the excavator is driven by a hydraulic motor, and the speed determines the speed.

Modern tanks are generally more than 50 tons, some are more than 60 tons, the track must adapt to the harsh terrain, and there is a certain defensive force of regional attack, of course, it is different from the civilian track, the excavator is not not in accordance with the standard of the tank to do the track, but the cost will be several times higher, and there is no need for such good performance.

The track is a flexible chain link driven by the driving wheels and surrounded by the driving wheels, load wheels, inducing wheels and carrier pulleys. The track consists of track shoes and track pins, etc.

Track pins connect the individual track shoes to form a track chainlink. There are holes at both ends of the track shoe, which are meshed with the driving wheels, and there are inducing teeth in the middle to regulate the track, and prevent the track from falling off when the tank turns or rolls over, and there are reinforced anti-skid ribs (referred to as patterns) on the side in contact with the ground to improve the firmness of the track shoe and the adhesion between the track and the ground.

Excavators only need to move slowly over short distances, while tanks need to maneuver quickly over long distances and adapt to various terrain conditions, and their tracks are of course different.

Small crawler excavator is to use the bucket to dig higher or lower Xiangsui in the bearing machine surface of the material, and loaded into the transport vehicle or unloaded to the stockpile yard earthmoving machinery, the boring excavation is mainly soil, no, sediment and pre-loosened soil and rock, from the development of construction machinery in recent years, the development of excavators is relatively fast, and excavators as one of the main construction machinery models in engineering construction, its correct selection is also more important.

Small crawler excavator from the appearance, digging the excavator is a working device, the upper turntable, the walking mechanism three parts, when the rotation operation, the surrounding obstacles, the terrain to do a good idea, auspicious safe operation, operation, to confirm the front and rear direction of the track, to avoid causing tipping and impact, try not to turn the final face of the excavator direction, otherwise it is easy to damage the walking motor or hose, during the operation, to ensure that the left and right tracks are in complete contact with the ground, improve the dynamic stability of the whole machine.

The small hydraulic excavator industry has developed by leaps and bounds, from the new favorite of construction machinery to the new favorite of the construction machinery market. With the development of China's economic construction, the demand for it is increasing, and its performance.

Why do tanks use tracks? The reasons are: the traditional wheeled transmission system tank moves faster and more flexibly than the corpse track, but in the war, the flat road must be a minority, and most of them are potholes, so it is difficult to give full play to its speed advantage.

The use of tracks is like laying an infinitely extended track for the tank, so that it can pass through various complex road conditions smoothly, quickly and safely. Including potholes, going up mountains, crossing rivers, etc....

Moreover, the speed of tracked tanks is not slow, generally at 60 70 kilometers per hour, and the American unmanned tank reaches 96 hours.

The tank is equipped with tracks in order to increase the force area and reduce the pressure. The rough area between the track and the ground is much larger than the contact area between the wheels and the ground, and with the track, you will not sink into mud or swamps. The main track is stronger than the wheeled type in off-road ability, can cross the ditch, over the low wall, and the climbing ability is also very good, which is incomparable to the wheeled type.

If the tank is on tires, then outwardly, the powerful feel of the tank will inevitably lose more than half, and the actual combat effectiveness of the tank must have a big impact.

The advantage of a wheelie tank is that the tank is faster, and the tires are faster than the tracks. This is an indisputable fact, so this is the advantage of a wheeled tank, but the advantage of speed is negligible compared to the disadvantages of tires to tanks. Obviously, since the battlefield orientation of the tank is both firepower and defense, the tank will be the main assault force of the army, and when it is in battle, these combat capabilities must be supported by tracks with the tank.

Obviously, if tires are used, the load-bearing capacity of the tank will be significantly reduced, which limits the armor capabilities of the tank. For a tank, if there is no qualified defense, then the tank is not a tank either.

The tank does not use the same wheels as the car but uses tracks, and the objective reason is that the geographical environment faced by the tank is very different from the actual combat environment, and the tank is very likely to be urban, rural, or even mountainous, swampy and other terrain. In such cases, the use of tracks is conducive to the safety and stability of operation, and the wheels are correspondingly dangerous.

It's suitable for a variety of terrains, and it's relatively safe.

In the early days, the tanks used the tracks of construction machinery, but later they were different.

Different materials: The material used in the tank is ZGMN13 high manganese steel, which belongs to special performance steel steel. The excavator uses ordinary steel for a large tonnage, and rubber for a small tonnage, which is much worse in terms of material.

Hanging glue: the tonnage of the tank is large, in order to avoid crushing the ground need to hang glue, the excavator's track hanging glue is not much, the tank track now generally has the track plate on the ground hanging glue, track pin ear hanging glue, and individual raceway surface hanging glue.

From the outside, the tracks of the tank are wider than those of the excavator, and the individual units are also relatively large, and the tooth patterns are also different.

It can't be the same, the tank is heavy, and the excavator is not running away, but it looks pretty much the same.

It's pretty much the same, the structure and function are pretty much the same!

There is also an excavator chassis is hydraulically driven, the engine is on the car, the hydraulic drive saves the trouble of the transmission, can accurately control the movement, but the movement efficiency is low, the speed is not fast, and the overall center of gravity is high, the mass is heavy, the chassis is wide, and the engine also drives the cylinder action, so the power provided to get off the car can not be as much as the tank, and it can walk in a relatively gentle terrain, and there is no need to change it to a torsion bar or oil and gas suspension, and it is difficult to have a strong passing force like a tank.

1. First of all, it is not necessary, the excavator does not pursue speed and passing ability.

2. Then there is the cost problem, the manufacturing cost and maintenance cost of the tank suspension device are very high, which will greatly increase the selling price of the excavator, and the cost of use, affecting sales.

3. Even if the excavator is equipped with the suspension device of the tank, the excavator can not be operated at high speed, because the center of gravity of the excavator is much higher than that of the tank, and the high-speed exercise will reduce the safety of the exercise, which may cause the excavator to overturn.

The first consideration is the economic efficiency, and the speed of travel is not its main issue; The tank considers military benefits, and speed, safety, and reliability are what it considers. If you replace it with the suspension and engine of the tank, it is estimated that you can buy a no less than 1000w ocean

Excavators are for work, tanks are for war, you say? Brothers.

Because the crawler can also walk well in some places with poor geographical locations.

Because the tank is heavier, it can't be supported if you use tires.

In this way, he can show in many places, and he will not be blocked by the harsh environment.

Because the place where the tank needs to go is generally for war, the terrain may sometimes not be suitable for wheels.

Pressure, that is, the ability to pass is high, the disadvantage is that the resistance is high and the movement speed is slow.

Method of reducing pressure: When the pressure is constant, increase the force area to reduce the pressure. When the force area is constant, reduce the pressure to reduce the pressure. The tank has wide tracks, which is to increase the force area to reduce the pressure of the tank on the ground when the pressure is constant.

So the answer is: pressure

Excuse me, why can't I add it to Weibo?