# Motor to Push Air into a Piston

• omalleyt
In summary, the author is looking for a pump that can pump air at a constant speed, as the weight of the load on the piston will affect the pressure of the air. He has already calculated that the pump needs to be at least 1/2 horsepower.
omalleyt
Alright. I need a motor that is capable of pumping air into a piston filled with compressed air. The motor needs to pump the air into the piston at a constant speed, as the piston is being used to raise up a load. The problem is that the weight of the load on the piston will be between 10-200 lbs. Since the weight of the load will change the pressure of the air in the piston, I'm concerned that it will also affect the speed at which the motor is able to pump in the air. I've already calculated that the motor needs to be at least 1/2 horsepower. Is there a way I can make sure the speed of the air pumped into the piston is constant?

The way that is worded is a little confusing. Have you already constructed the pump and are looking for a motor to power it or are you looking for a pump?

In any case, since air is compressible, it isn't possible to construct a positive displacement air pump (a pump where the volume moved is always constant). The closest thing you can hope for is a variable speed pump with some sort of feedback control.

what pressure do you estimate that it would need? What travel thru the bore? How is the piston sealed? Does the piston need to go at a specific rate? How many times does the unit need to go up and down? Does the downward travel also need a specific rate of travel? As previously stated, a constant output pump will not work, it would need a constant pressure, and flow rate, and both would vary with the mass applied on top. My first impression would be to use a motor/pump, pressure holding tank, and a control mechanism to supply a set pressure, and displace the volumn as the piston raises.

dr

I agree that some sort of feedback loop is essential, and an accumulator would be of great help. One thing eludes me. Do you mean that the volume of delivered air must be constant, or the speed of the piston? Wouldn't those diverge during travel due to the compression factor?

## 1. What is a motor to push air into a piston?

A motor to push air into a piston is a mechanical device that converts energy into motion, specifically to move air into a piston chamber. This motion creates pressure that pushes the piston, which can then be used to power various machines or devices.

## 2. How does a motor to push air into a piston work?

A motor to push air into a piston works by using a combination of electrical and mechanical components. The motor converts electrical energy into rotational motion, which then drives a crankshaft. The crankshaft is connected to a piston, which moves back and forth within a chamber, creating pressure and pushing air into the piston.

## 3. What are the different types of motors used to push air into a piston?

The most common types of motors used to push air into a piston are electric motors, internal combustion engines, and pneumatic motors. Electric motors use electricity to create motion, while internal combustion engines use controlled explosions to drive the piston. Pneumatic motors use compressed air to power the piston.

## 4. What are some applications of a motor to push air into a piston?

A motor to push air into a piston has a wide range of applications, including in automotive engines, industrial machinery, pneumatic tools, and even in household appliances like refrigerators and air conditioners. It is also commonly used in compressors for air and gas storage.

## 5. What are the benefits of using a motor to push air into a piston?

One of the main benefits of using a motor to push air into a piston is its high power-to-weight ratio. It can generate a significant amount of force in a relatively compact size. Additionally, it is a versatile and efficient way to convert energy into motion, making it suitable for a variety of applications.

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