CN2441788Y

CN2441788Y - Hoisting device

Info

Publication number: CN2441788Y
Application number: CN 00221873
Authority: CN
Inventors: 桑有富
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-22
Filing date: 2000-09-22
Publication date: 2001-08-08
Anticipated expiration: 2010-09-22

Abstract

The utility model relates to a hoisting device, comprising a speed reducing mechanism which is driven by a drive motor and is provided with a speed reducing ratio of 8000 to 12000, and a support frame for supporting the drive motor and the speed reducing mechanism. A hoisting threaded rod is arranged on an output shaft of the speed reducing mechanism. Two hoisting rods which adopt the hoisting threaded rod as a symmetrical center is arranged on a hoisting nut. The two hoisting rods are hinged with a hoisting belt which is hinged with the lower end of the hoisting rods. The hoisting threaded rod is driven by the speed reducing mechanism with a large speed ratio. The hoisting nut goes up or goes down along the hoisting threaded rod. Thus, a micro-motion hoist is realized. The hoisting speed is 0.7 to 1.4 mm per minute. The requirement of micro-motion hoist when a main shaft of a steam turbine in a power plant is inspected and repaired is ensured effectively.

Description

A kind of hoisting device

The utility model relates to a kind of hoisting device, particularly a kind of hoisting device that is used for the power plant steam turbine maintenance.

In the prior art, when power plant maintenance turbine bearing pad promotes main shaft, main by the driving lifting.During maintenance, lifting turbine spindle one end rolls up following watt, checks its grinding situation or adjusts following watt of pad.Turbine spindle one end only allows to lift by crane 0.2～0.7 millimeter, surpasses this and causes the damage of steam turbine crux spare highly easily.The shortcoming that adopts the driving lifting to exist is: the lifting of driving crawl is difficult to control, easily causes the damage of steam turbine crux spare, and lifting is frequent, and it is oversize to take running time.

The purpose of this utility model is at the deficiencies in the prior art, has proposed a kind of fine motion hoisting device that is used for the power plant steam turbine maintenance.

The purpose of this utility model reaches by the following technical programs, a kind of hoisting device, be characterized in: comprise that the reduction ratio that is driven by drive motor is 8000～12000 speed reduction gearings and the bracing frame that supports moving motor and speed reduction gearing, on the speed reduction gearing output shaft, lifting bolt is housed, lifting bolt is provided with the jacknut that is threaded onto on the lifting bolt, it is two vertical grooves of center of symmetry that jacknut is provided with the lifting bolt, be separately installed with in two grooves by setting nut and be loaded on two gibs on the jacknut, play heave hand with gib lower end pivotally attached.Speed reduction gearing by large speed ratio drives lifting bolt, and lifting bolt is provided with the jacknut that is threaded onto on the lifting bolt and rises or descend along lifting bolt, thereby realizes the fine motion lifting, during lifting, can give the heave hand pretension by setting nut,, raise the efficiency so that save time.

The purpose of this utility model can also come further to reach by the following technical programs, and the setting nut of above-mentioned gib upper end is installed on the jacknut by the aligning cushion block of smooth cambered surface.Because the effect of aligning cushion block, swing with the variation of the lifting diameter of axle lower end of gib, thus make gib axially all the time be subjected to force direction consistent.

The purpose of this utility model can also come further to reach by the following technical programs, and above-mentioned to play a heave hand be the lifting hinge.Adopt lifting hinge safety easy to use, be difficult for producing elastic deformation.

The purpose of this utility model can also come further to reach by the following technical programs, and the reduction ratio of described speed reduction gearing is 10000.This reduction ratio is best reduction ratio.

The purpose of this utility model can also come further to reach by the following technical programs, indicates the scale of the axis centering of adjusting lifting bolt line of centers and institute's suspension shaft on the described bracing frame between the supporting leg of lifting bolt center and bracing frame.Be convenient to make the center of lifting and the line of centers centering of turbine shaft by scale.

Compared with prior art, hoisting device described in the utility model, since adopted at a high speed than speed reduction gearing and the driving device of lifting bolt and jacknut, thereby realize the fine motion lifting, adopting this to install its hoisting speed is 1.12 mm/min, the requirement of fine motion lifting when actv. has guaranteed the power plant steam turbine main spindle overhauling.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is that the A--A of Fig. 1 is to cutaway view.

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail.

Embodiment one, the specific embodiment of the present utility model as depicted in figs. 1 and 2, a kind of hoisting device, comprise that the reduction ratio that is driven by drive motor 3 is the bracing frame 8 of 10000 speed reduction gearings 4 and support drive motor 3 and speed reduction gearing 4, on speed reduction gearing 4 output shafts, lifting bolt 13 is housed, lifting bolt 13 is provided with the jacknut 7 that is threaded onto on the lifting bolt 13, it is two vertical grooves 15 of center of symmetry that jacknut 7 is provided with lifting bolt 13, be separately installed with in two grooves 15 by setting nut 5 and be loaded on two gibs 9 on the jacknut 7, with gib 9 lower end pivotally attached lifting hinges 10.Speed reduction gearing 4 by large speed ratio drives lifting bolt 13, and the jacknut 7 that is threaded onto on the lifting bolt 13 rises or descends along lifting bolt 13, during lifting, can give lifting hinge 10 pretensions by setting nut 5, so that save time, raises the efficiency.Weight during lifting is pressed on the bracing frame 8 by cushion block 2 and the bearing 1 that is fixed on the lifting bolt 13, and hoisting speed is 1.12 mm/min, thereby realizes the fine motion lifting.It plays heave hand can also adopt cable wire, or adopts other special-purpose hoist frame.

Embodiment two, and present embodiment continues to describe summary of the invention of the present utility model, and in the embodiment one described hoisting device, the reduction ratio of its speed reduction gearing is 8000, and hoisting speed is 0.7 mm/min.The setting nut 5 of its gib 9 upper ends is installed on the jacknut 7, as depicted in figs. 1 and 2 by the aligning cushion block 6 of smooth cambered surface.Because the effect of aligning cushion block 6, swing with the variation in suspension shaft 12 footpaths the lower end of gib 9, thus make gib 9 axially all the time be subjected to force direction consistent.

Embodiment three, and present embodiment continues to describe summary of the invention of the present utility model, and in the embodiment one described hoisting device, the reduction ratio of its speed reduction gearing is 12000, and hoisting speed is 1.4 mm/min.Between the supporting leg 11 of lifting bolt 13 centers and bracing frame 8, indicate the scale 14 of the axis centering of adjusting lifting bolt 13 line of centerss and institute's suspension shaft 12 on its bracing frame 8, as shown in Figure 1.Be convenient to make the center of lifting and the line of centers centering of turbine shaft 12 by scale 14.The requirement of fine motion lifting when actv. has guaranteed the power plant steam turbine main spindle overhauling.

Claims

1, a kind of hoisting device, it is characterized in that: comprise that the reduction ratio that is driven by drive motor (3) is the bracing frame (8) of 8000～12000 speed reduction gearings (4) and support drive motor (3) and speed reduction gearing (4), on speed reduction gearing (4) output shaft, lifting bolt (13) is housed, lifting bolt (13) is provided with the jacknut (7) that is threaded onto on the lifting bolt (13), it is two vertical grooves (15) of center of symmetry that jacknut (7) is provided with lifting bolt (13), be separately installed with in two grooves (15) by setting nut (5) and be loaded on two gibs (9) on the jacknut (7), play heave hand (10) with gib (9) lower end pivotally attached.

2, hoisting device according to claim 1 is characterized in that: the setting nut (5) of described gib (9) upper end is installed on the jacknut (7) by the aligning cushion block (6) of smooth cambered surface.

3, hoisting device according to claim 1 and 2 is characterized in that: described heave hand is lifting hinge (10).

4, hoisting device according to claim 1 is characterized in that: the reduction ratio of described speed reduction gearing (4) is 10000.

5, hoisting device according to claim 1 is characterized in that: described bracing frame (8) is gone up the scale (14) that indicates the axis centering of adjusting lifting bolt (13) line of centers and institute's suspension shaft (12) between the supporting leg (11) of lifting bolt (13) center and bracing frame (8).