What Is a Reciprocating Compressor?

The reciprocating compressor refers to a compressor that changes the volume of the cylinder body periodically and realizes the pressurization and transportation of gas through the reciprocating motion of the piston or diaphragm in the cylinder. Is a positive displacement compressor. According to the reciprocating components, they are divided into piston and diaphragm compressors. ^[1]

Reciprocating compressor

First, due to the relationship between design principles, the piston is determined

Reciprocating compressors have cylinders, pistons, and air valves. The working process of compressed gas can be divided into four processes: expansion, suction, compression and exhaust.

Example: The cylinder of a single-suction compressor. This compressor has a suction valve and a discharge valve only in one section of the cylinder. The piston only inhales and exhausts once every reciprocation.

(1) Expansion: When the piston moves to the left, the volume of the cylinder increases, the pressure decreases, and the original remains in the

Common cause	Approach	Occur phenomenon
Loose or worn bearing pads	Reversing maintenance	Knocking sound in crankcase
Crankshaft wear	Reversing maintenance
Large gap between crosshead and slide	Reversing maintenance
Loose crosshead pin and connecting rod bolt	Reversing maintenance
Loose balance iron	Reversing maintenance
Oil cut and transmission parts burn out	Reversing maintenance
Liquid brought into the cylinder	Contact the relevant section; emergency stop treatment	There is a knock on the cylinder
Valve fragments are brought into the cylinder	Parking treatment
Loose piston or rod nut	Back check
Broken piston ring	Reverse piston ring
Cylinder clearance is too small	Backlash adjustment clearance
Poor oil quality	Oil change	Low oil pressure at circulating oil pump outlet
Oil temperature is too high	Increase the amount of cooling water
Oil filter is clogged	Back-up cleaning filter
Leak or blockage of oil pump inlet	Reverse inspection or unblock the inlet pipe
Fuel tank level is too low	Refuel, raise oil level
Severe oil leakage from the pump or excessive clearance	Overhaul
The pump circuit valve is too large	Close small circuit valve
High temperature or low pressure of a section of inlet gas	Contact the desulfurization section to reduce the inlet air temperature or increase the pressure	Insufficient compressor air volume
The valve is clogged with tar	Reverse wash valve
The valve flap is broken, the spring is broken, the aluminum pad is not installed, or the inner point is broken.	Reverse valve, spring or aluminum pad
Worn or broken piston rings	Reverse piston ring
Cylinder wear	Overhaul during overhaul
Cylinder clearance is too large	Backlash adjustment cylinder clearance
Severe air leaks in the packing	Reversing Maintenance Packing
Loop valve leak	Maintenance circuit valve
Leak at equilibrium	Parking maintenance
Reduced circulating oil pressure	Worn pump
Dirty oil filter	Repair or replace the oil pump