[Jack principle] Hydraulic jack schematic diagram What is the working principle of the jack
Working Principle of Jack
Jacks are divided into mechanical jacks and hydraulic jacks, each with its own principle different. In principle, the hydraulic jack principle is based on Pascal’s principle, that is: the pressure of the liquid is consistent everywhere. In this way, in a balanced system, the pressure exerted on the smaller piston is smaller, while the pressure exerted on the larger piston is smaller. It is also relatively large, which can keep the liquid still. Therefore, through the transfer of liquid, different pressures on different ends can be obtained, so that a transformation can be achieved. The hydraulic jacks we often see use this principle to achieve force transmission. The mechanical jack uses the mechanical principle to pull the handle back and forth, and the claw is pulled out to push the ratchet to rotate through the gap. The small bevel gear drives the large bevel gear to rotate the lifting screw, so that the lifting sleeve is lifted or lowered, and the lifting force is achieved. Function. But it is not as simple as a hydraulic jack.
Basic equation of static pressure (p=p0+ρgh), stored in a closed container When the external pressure of a liquid changes, as long as the liquid remains in its original static state, the pressure at any point in the liquid will change by the same amount. This means that in a closed container, the pressure exerted on a stationary liquid will be transmitted to all points at the same time with the same value. This is the static pressure transfer principle or Pascal’s principle. Pascal’s law is that in fluid mechanics, due to the fluidity of the liquid, the pressure change that occurs in a certain part of the stationary fluid in a closed container will be transmitted in all directions unchanged. Pascal first formulated this law. Pressure is equal to the applied pressure divided by the stressed area. According to Pascal’s law, applying a certain pressure on one piston in a hydraulic system will produce the same pressure increase on the other piston. If the area of the second piston is 10 times the area of the first piston, then the force acting on the second piston will be greater than that of the first piston 10 times, while the pressure on the two pistons is still equal. This law was first proposed by the French mathematician, physicist, and philosopher Blaise Pascal. This law has very important applications in production technology. Hydraulic machines are examples of Pascal’s principle. It has multiple uses such as hydraulic braking, etc. Pascal also discovered that the pressure at any point in a stationary fluid is equal in all directions, that is, the point isThe pressure on all planes passing through it is equal. This fact is also known as Pascal’s principle.
The formula can be expressed as: P1=P2That is, F1÷ S1=F2÷S2.
Hydraulic jack schematic diagram
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