Centrifugal pump impeller

Abstract

This invention relates to equipment designed for pumping fluids and can be used in industry, agriculture and domestically. The technological result achieved by this invention is increasing centrifugal pressure without affecting the efficiency coefficient of the impeller of a centrifugal pump. The essence of this invention consists in the impeller of a rotary pump with the angle between the line tangent to the trailing edge of a vane and the line tangent to the circumference of the impeller in the 40°-90° range, while the shape of the vanes corresponds to second-order surfaces, which permits the vanes to be made inclined towards the impeller rotation direction and stretched towards the eye of the impeller.

1 . The impeller of a centrifugal pump, characterised by the angle between the line tangent to the trailing edge of the vanes and the line tangent to the circumference of the impeller being in the 40°-90° range, while the shape of the vanes corresponds to second order-surfaces, which enables the vanes to inclined towards the impeller rotation direction and stretched towards the eye of the impeller. 
     
     
         2 . The impeller of a rotary pump as in  claim 1 , characterised by the angle between the line tangent to the trailing edge of a vane and the line tangent to the circumference of the impeller being in the 80°-90° range. 
     
     
         3 . The impeller of a rotary pump as in  claim 1 , characterised by the angle between the tangent to the leading edge of a vane and the line tangent to the circumference of the impeller being within the 10°-25° range. 
     
     
         4 . The impeller of a rotary pump as in  claim 3 , characterised by the angle between the line tangent to the leading edge of a vane and the line tangent to the circumference of the impeller being within the 12°-15° range and the angle between the line tangent to the trailing edge of a vane and the line tangent to the circumference of the impeller being within the 80°-90° range. 
     
     
         5 . The impeller of a rotary pump as in  claim 1 , characterised by containing a row of auxiliary vanes. 
     
     
         6 . The impeller of a rotary pump as in  claim 5 , characterised by the length of the auxiliary vanes being 40-60% of the length of the main vanes. 
     
     
         7 . The impeller of a rotary pump as in  claim 5 , characterised by the angle between the line tangent to the outlet end of the auxiliary vanes and the line tangent to the circumference of the impeller being in the 40°-90° range. 
     
     
         8 . The impeller of a rotary pump as in  claim 5 , characterised by containing an additional row of auxiliary vanes. 
     
     
         9 . The impeller of a rotary pump as in  claim 8 , characterised by the length of the additional auxiliary vanes being 40-60% of the length of auxiliary vanes.