27 basic knowledge points of centrifugal pump!

1. What is the main working principle of centrifugal pump?
The motor drives the impeller to rotate at a high speed, causing the liquid to generate centrifugal force. Due to the action of centrifugal force, the liquid is thrown into the side channel and discharged out of the pump, or into the next stage impeller, so as to reduce the pressure at the inlet of the impeller and form a pressure difference with the pressure acting on the suction liquid. The pressure difference acts in the liquid suction pump. Due to the continuous rotation of the centrifugal pump, The liquid is continuously inhaled or discharged.
2. What are the functions of lubricating oil (grease)?
Lubrication, cooling, flushing, sealing, vibration reduction, protection and unloading.
3. What is the three-stage filtration of lubricating oil before use?
Level I: between the original lubricating oil barrel and the fixed barrel;
The second stage: fixed between the oil barrel and the oil pot;
Level 3: between the oil pot and the refueling point.
4. What is the "five determinations" of equipment lubrication?
Fixed point: add oil at the specified point;
Timing: oil the lubricating parts according to the specified time and change the oil regularly;
Quantitative: quantitative refueling according to consumption;
Quality determination: select different lubricating oils according to different models and keep the oil quality qualified;
Fixed person: each refueling part must be in the charge of a special person.
5. What is the harm of water in pump lubricating oil?
Water can reduce the viscosity of lubricating oil, weaken the strength of oil film and reduce the lubrication effect.
Water below 0 ℃ will freeze, which will seriously affect the low-temperature fluidity of lubricating oil.
Water can accelerate the oxidation of lubricating oil and promote the corrosion of low molecular organic acids to metals.
Water will increase the foaming property of lubricating oil and make the lubricant easy to generate foam.
Moisture can rust metal parts.
6. What are the maintenance contents of the pump?
Carefully implement the post responsibility system, equipment maintenance and other rules and regulations.
The equipment lubrication shall be "five fixed" and "three-level filtration", and the lubrication equipment shall be complete and clean.
Maintenance tools, safety facilities, fire-fighting equipment, etc. shall be complete and placed neatly.

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