What Causes Insufficient Pressure in a Triplex Plunger Pump?
3 Answers
Insufficient pressure in a triplex plunger pump may be caused by the aging of the washing pump. Below are relevant details: 1. Concept: A triplex plunger pump is a type of equipment primarily used for intermittent operations such as acidizing, cementing, fracturing, and well plugging. 2. Features: The pump's reducer can be installed in 17 different positions, allowing it to adapt to various drive lines of the pump unit; two different pump head bodies are available to accommodate plungers of different sizes (due to varying pressure and displacement requirements); optionally selectable packing components, valve assemblies, discharge flanges, suction manifolds, etc., to meet the needs of different layouts, media, and environments; the pump features a lightweight and simple structure, reduced weight, maximum displacement, and highest pressure.
I've been repairing hydraulic pumps for over a decade, and the most common reason for low pressure in triplex plunger pumps is worn-out seals. See those grooves worn into the plunger sleeve? Worn-out distributor valve plates causing oil leaks are also very common. Last time I encountered an excavator with this issue, replacing the seals fixed it immediately. Also, check the intake pipe - air suction or clogged filters can cause power loss, as can low oil levels in the tank. If the hydraulic oil is too thin or the temperature too high, it's like a person with fever losing strength - insufficient viscosity can't build pressure. Finally, inspect the relief valve - a weakened or stuck spring can cause pressure loss. Don't make do with insufficient pressure, as it can cause collateral damage to motors and cylinders.
Bro, have you disassembled the pump? I've encountered many such situations when working on construction machinery maintenance. First, feel if the inlet pipe is hot—if it's scalding, it means there's poor oil suction. The filter position is particularly prone to clogging, especially after a year or so when silt completely blocks the mesh. I remember one time when we didn't change the filter due to tight construction deadlines, and the entire pump was ruined. The clearance between the plunger and cylinder is also crucial—if it exceeds 0.05mm, you should consider replacing them. Also, try adjusting the flow handle; if it's stuck or the spring is loose, it's game over. Lastly, check the oil—if the viscosity is too low or there are too many impurities, you'll need fresh oil. Old oil with insufficient thickness, like water, won't build up any pressure.
