What is the principle of a pump How to use a pump

Pump principle When using a pump, it is necessary to connect its outlet pipe to the valve of the bicycle tire, and the function of the valve is to only allow air to enter the tire from the pump, and not allow air to flow into the pump from the tire backwards. There is a gap between the piston and the wall of the pump, and there is a rubber bowl on the piston that is concave downward. When the piston is pulled upwards, the volume of air under the piston increases, the pressure decreases, and the air above the piston is squeezed from all sides of the bowl to the bottom.

When the piston is pressed down, the volume of air under the piston decreases and the pressure increases, so that the rubber bowl is pressed against the cylinder wall to prevent the air from leaking above the piston, and the piston is continued to be pressed down, when the air pressure is enough to push the wheel open.

When the valve core of the tyre is in place, compressed air enters the tire. At the same time, the air outside the barrel enters the top of the piston through the gap at the upper end of the barrel.

In fact, the pump is one of the simplest check valves! When the pull rod is lifted up, the leather bowl installed at the lower end of the pull rod shrinks, and the air enters the air from the small hole on the cylinder cover (some have no holes, it enters from the large gap between the pull rod and the cover), and when the pull rod is pressed down, the leather bowl expands and adheres to the inner wall of the cylinder to press the air down! The gas can only enter the valve of the tire from a small hole at the bottom of the cylinder, and a small iron ball (some are made of small iron sheets) along the leather tube!

And when the lever is lifted up the second time, the leather bowl shrinks again. At this time, the small iron ball falls, and the small hole is closed, so that the air in the tire that has not been completely injected for the first time will not be pumped out because of this!

It's just a back-and-forth process.

By compressing the volume of the gas, the density is increased.

The volume decreases and the density increases.

Place the foot-operated pump. 2. Connect the pump connector of the pedal pump to the bicycle valve.

3. Start inflating the bike by pressing the inflatable pedal with your foot.

4. Observe that the pressure gauge pointer is close to the standard air pressure marked on the bicycle tire to end the inflation.

Note: Although there are many types of vehicles, the structure is similar. This should be said to be the credit of standardization, but also the need for large-scale production lines.

With the development of society, the progress of science and technology and the change of demand, the shape of railway vehicles has begun to change, especially the passenger car is no longer the same old face. However, their basic structure has not changed significantly, but the specific parts have a more scientific and advanced structural design.

Generally speaking, the basic structure of the vehicle is composed of five parts: the car body, the undercarriage, the running part, the coupler buffer device and the braking device.

The body is the part of the vehicle that is used to load goods or passengers, and is the basis for the installation and connection of other components of the vehicle. The body of the early vehicles was mainly made of wood, supplemented by steel plates, bow rods, etc. In modern times, the car body is mainly steel structure or light metal structure.

1. Open the valve protection cover of the shock absorber to expose the air valve;

2. Connect the air nozzle with a special pump with a barometer;

3. Use a pump to inflate the shock absorber so that the air pressure is close to the normal air pressure of the shock absorber;

4. Gently loosen the air release screw on the air cylinder, observe the air pressure gauge, and stop the air release when the desired air pressure is reached. (Normally, the minimum air pressure should not be lower than 80% of the standard air pressure).

It takes 2 people to operate, one holds the mouth, and the other cheers, which is very difficult.

You have to work hard, and you have to have a rhythm, you can't just push hard, that you can't hit in.

The specific operation steps for using the pump are as follows:1Assemble the pump and connect the air balloon to be used and the mouth of the pump; 2.

Open the regulating valve of the air cylinder, adjust the pressure of the air cylinder of the morning hood, and at the same time manually press the air cylinder to blow the air into the air balloon; 3.When the balloon begins to expand, immediately release the airbag and let the balloon contract automatically to avoid over-expansion; 4.Pull out the air balloon from the mouth of the cylinder to complete the pumping of an air balloon cavity sock.

The principle of the pump is: the pump is an air pump that draws air into the storage area by pulling it, and then injects or replenishes the air required by various tires and some balls by propulsion. When the handle is lifted up the second time, the check valve closes, and when the handle is pressed down again, the air rushes open the check valve and enters the tire.

This cycle repeats itself to inflate the tires.

Now the most common pump is made of stainless steel, mainly because stainless steel has strong oxidation resistance, long service life, not easy to rust, anti-corrosion, not easy to deform, lead-free safety, high hardness, wear resistance and other advantages, durable, talking spine is widely used in various balls, bicycles, motorcycles, etc.

When using a pump, connect its outlet pipe to the valve of the bicycle tire, and the function of the valve is to only allow air from the pump to enter the tire, and not allow air from the tire to flow backwards into the pump.

There are two types of manual pumps: the old-fashioned cowhide bowl pump with the inner tube sliding and the new wind-type pump with the outer tube sliding. The advantage of the new pump is that it is light and refreshing, and it is not easy to stain clothes.