Pump Shaft Sleeve

A shaft sleeve is a cylindrical hollow metal tube placed over the shaft to

protect as it passes through the packing. Pump shafts are often protect-

ed from erosion, corrosion, and wear at leakage joints, seal chambers,

internal bearings and in the waterways by renewable sleeves.

   

    The most common shaft sleeve function is that of protecting the shaft

from packing wear at the stuffing box. A shaft sleeve used between two

multistage pump impellers in conjunction with the inter-stage bushing to

form an inter-stage leakage joint is called an inter-stage or distance sleeve.

    These are used in single stage pumps. Impeller and sealing gland are not

directly  mounted on  shaft.  A sleeve is fitted  between the bore of the

impeller and OD of the shaft and keyed with the shaft i.e.  impeller rotate

with the sleeve along with the shaft. The wearable part in this type of assembly is the  sleeve,  which  is  far  less  expensive  than  the  shaft.

 

    The  function  of  the impeller sleeves is to protect the shaft from wear and coming in contact with the pumping fluid.

 

    Pump shafts are usually protected from erosion, corrosion, and wear at seal  chambers,  leakage  joints,  internal  bearings,  and  in  the  waterways  by renewable  sleeves.

    The  most  common  shaft  sleeve  function  is  that  of protecting the shaft from wear at packing and mechanical seals. Shaft sleeves serving other functions are given specific names to indicate their purpose.

For example,  a  shaft  sleeve  used  between  two  multistage  pump impellers  in  conjunction  with  the  interstage  bushing  to  form  an  interstage leakage joint is called an interstage.