Hydraulic turning overhauling device and method for large vertical axial-flow pump unit

Abstract

The invention discloses a hydraulic turning overhauling device and method for a large vertical axial-flow pump unit. The device comprises a gear disk, two hydraulic motors and a detecting instrument;the gear disk is mounted on a thrust bearing through bolts; a motor spindle penetrates through the center of the gear disk; lifting rings are arranged on the upper surface of the gear disk; the two hydraulic motors are arranged symmetrically with the motor spindle used as the center; the two hydraulic motors work synchronously; the hydraulic motors are mounted on a motor casing through adjustablesupporting seats; the adjustable supporting seats are used for adjusting the horizontal positions, the vertical positions and the inclination angles of the hydraulic motors; pinions driven by the hydraulic motors are in meshing connection with the gear disk; and the detecting instrument is used for detecting the motor spindle or a pump shaft. The power is sufficient, the stress balance of the geardisk can be guaranteed, the horizontal positions, the vertical positions and the inclination angles of the hydraulic motors are adjusted through the adjustable supporting seats, the meshing precisionof the pinions and the gear disk is guaranteed, and safe and stable operation of a water pump is guaranteed.

Description

Technical field: [0001] The invention relates to the field of maintenance of large axial flow pump units, in particular to a hydraulic barring maintenance device and method for large vertical axial flow pump units. Background technique: [0002] The stability of the shaft system of the pump unit is crucial to the safety of the entire pumping station. It is usually divided into three centers. The "three centers" refer to the axis of the pump unit, the center of the unit and the center of rotation. The central axis is the connection line between the motor and the main shaft of the water pump, which is called the main shaft axis of the pump unit; the center of the unit is the connection line between the centers of the motor stator, the upper frame of the water pump unit, the lower frame, the top cover of the water pump, and the water guide shaft socket. , which is called the equipment installation center of the pump unit; the rotation center refers to the center point where the...

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Problems solved by technology

[0006] In order to make up for the deficiencies in the prior art, the present invention provides a large-scale vertical axial-flow pump unit hydraulic cranking maintenance device and maintenance method, which solves the problems that the previous cranking device cannot be adjusted and has poor stability, and solves the problems of the previous cranking device. The detection error is too large, and the installation and debugging accuracy of the whole unit is reduced, which solves the problems that the center of the rotating part does not coincide with the center of the unit, the gap is uneven, and the main shaft swing is too large.

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