Table of Contents
What happens in the volute casing of the centrifugal pump?
The volute of a centrifugal pump is the casing that receives the fluid being pumped by the impeller, maintaining the velocity of the fluid through to the diffuser. As liquid exits the impeller it has high kinetic energy and the volute directs this flow through to the discharge.
What are the importance of casing for centrifugal pump?
Casing in centrifugal pump serves to seal off the inside of the pump to the atmosphere to prevent leakage and retain pressure. In the case of centrifugal pumps, they surround the pump rotor which transmits energy to the fluid handled via the impeller mounted on the rotating shaft.
How does a volute casing differ from a vortex casing for the centrifugal pump?
Volute casing increases the efficiency of the pump but a large amount of energy is lost due to formation of eddies. Vortex casing is a circular chamber placed in between the casing of the pump and the Impeller as shown in the above figure.
Which of the curve is used in the design of a volute casing of centrifugal pump?
Answer: (a) Q-η curve, (b) Q-H curve, and (c) Q-P shaft curve. As is indicated in Figure 6(a) and Table 3, the highest efficiency is reached when volute cross-section shape is round, and the second highest cross-section shape is horseshoe shaped which is 1.05\% lower than that of round-shaped cross-section.
What is volute chamber?
A spiral-shaped casing around the impeller of a centrifugal pump. It is used to convert kinetic energy of the moving fluid into pressure energy at the point of discharge…. …
What is a volute and how is it produced?
In a volute casing, the impeller is offset, effectively creating a curved funnel with an increasing cross-sectional area towards the pump outlet. This design causes the fluid pressure to increase towards the outlet (Figure 2). The same basic principle applies to diffuser designs.
What is the function of volute casing?
The volute casing is designed to guide the flow out of the impeller in order to convert the fluid flow’s kinetic energy into static pressure; it serves to collect the fluid discharged from the impeller and route it to the discharge nozzle (also see Pump casing).
What is single volute casing?
In a single volute casing, the impeller discharges into one volute that wraps completely around the impeller. This type of casing features one cutwater that directs the flow of the liquid towards the discharge of the pump.
What is the purpose of volute casing?
Why a vortex casing has higher efficiency than a volute casing?
In this type of casing, the velocity head of the liquid leaving the impeller is converted more completely into pressure than in the volute type, potentially making its efficiency slightly higher.
How does a volute casing work?
What is volute type?
A volute is a spiral-like geometry with an increasing through-flow area, reducing the velocity of the fluid and increasing the static pressure. The fluid exiting the impeller is then diffused towards the casing discharge nozzle. These volute casings come in two different types: single volute and double volute.