| 摘要 |
hoisting-and-conveying machinery; block brakes of hoisting-and conveying machines. SUBSTANCE: pusher has reversing drive motor, cylinder-accommodating pusher case placed above motor and filled with working fluid, piston with rod passed through hub of pusher case top part. Pump housing is installed on motor board. Drive motor shaft mounts impeller with radial blades Z1 whose entrance edge is inclined to pump axis through angle alpha1 and whose top radius is approximately equal to radius R0 of pump housing inlet bore. Diffuser grid is mounted above cylinder, impeller is placed between pump housing and diffuser grid, radial blades Z1 of impeller are arranged uniformly and symmetrically. Coefficient of flow constraint K1 at entrance edges of blades Z1 is between 1.1 and 1.15. Additional radial blades Z2 are uniformly and symmetrically arranged between mentioned blades Z1, angle of inclination of their entrance edge to pump axis being alpha2≅ alpha1, entrance edge top radius R20 is greater than pump housing bore radius R0 and ranges within K1R0≅R20≅(K1-1)/2)R0. EFFECT: reduced pressure loss of liquid, improved speed of pusher. 3 dwg, 1 tbl |
