Can a piston compressor use a hollow piston?
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As the title suggests, if it can be used, since the piston is under external pressure, does it need to have its strength increased or should holes be made in the piston? But the question is where to make the openings, how many to make, and what size they should be? Will it increase the clearance volume and reduce the volumetric efficiency? Also, how is the gas inside the piston replaced during driving and parking? Please give me some advice. Thank you!
Hollow piston heads are generally not used.
I have never seen hollow pistons; only the pistons in small air compressors are of the semi-fast type.
What does a hollow piston mean? Is the inside of the piston empty or not? There is a hollow space inside the piston. The pistons of the first and second stages of the 4M65 type four-stage compression reciprocating compressors manufactured by Weifang Shengjian, which were used in the previous company, are hollow as well, with two halves fitting together. In levels 3 and 4, due to high pressure, the piston and the piston rod are integrated as one unit. It is designed to be hollow on the inside in order to reduce inertial forces. Moreover, the piston at stage one is made of cast aluminum.
Many of them are hollow, which reduces weight and lowers inertia during operation
Could you explain the hollow piston? Since the interior of it is in communication with the gas inside the cylinder, does this lead to an increase in the clearance volume and a decrease in efficiency? Additionally, during the starting and stopping processes, how is it ensured that the process gas and air are completely replaced?
This post was last edited by CHANGBAISHI on 2017-11-9 at 20:29. It depends on the metal material, manufacturing process, and the pressure requirements; for example, in the case of aluminum castings, there are reinforcing ribs inside, and the manufacturing-related holes can be mechanically sealed. As for those of the Yu series, they can all handle the load during use. Hollow pistons are mostly used in large-diameter, low-pressure equipment.
It can be designed as a hollow piston, which is commonly used in compressors abroad. As for how to replace the gas inside the piston during startup and shutdown, it’s quite simple: just make a 1mm exhaust hole in one of the piston ring grooves. This is how compressors abroad are designed
Of course it can be used. The interior is hollow with reinforcing ribs; it’s usually made of cast aluminum. The pressure isn’t very high. It consists of two halves, and the support rings are heat-fitted – it’s from an older model