CN209778243U

CN209778243U - Shaft lifting device

Info

Publication number: CN209778243U
Application number: CN201920537954.4U
Authority: CN
Inventors: 宋子良; 顾建军; 黄俊辉; 朱世奇; 毛剑锋; 董高科; 琚露俊
Original assignee: ZHENHAI PETROCHEMICAL JIANAN ENGINEERING Co Ltd
Current assignee: Zhenhai Petrochemical Construction And Installation Engineering Co ltd
Priority date: 2019-04-18
Filing date: 2019-04-18
Publication date: 2019-12-13
Anticipated expiration: 2029-04-18

Abstract

A shaft lifter comprises a cross beam; a lifting device; the method is characterized in that: the both ends of crossbeam are supported on the bearing frame and can be along with its length direction removal through respective rolling element respectively, lifting device includes: the lifting mechanism is supported at a position on the cross beam corresponding to the upper part of the rotor, and the output end of the lifting mechanism extends vertically upwards and can move up and down to realize lifting; the output end is provided with a fixed pulley; at least two tensioning pieces are arranged on the cross beam and are distributed in bilateral symmetry by taking the lifting mechanism as a center; the bearing strip is used for supporting the rotor, is in an end-to-end annular structure, is wound on the fixed pulley, the tensioning members on the left side and the right side and the lifted rotor, and can rotate anticlockwise or clockwise along the fixed pulley and the tensioning members under the inclined state of the lifted rotor so as to realize tightness adjustment. Compared with the prior art, the utility model discloses can realize automatic aligning.

Description

Shaft lifting device

Technical Field

the utility model belongs to the technical field of large-scale unit maintenance equipment, concretely relates to lift axle ware.

background

At present, a shaft lifting device for overhauling and matching a large-scale unit is too simple in structure and poor in practical effect, generally speaking, the shaft lifting device is one of special tools matched randomly, and is single in function, low in using efficiency, independent in application range, serious in resource waste and manpower waste, poor in universality with other devices and units, and not very simple and convenient to install and use during overhauling. Particularly, for a large unit, the shaft lifter is suitable for the inspection, maintenance and repair of a single large rotating device only through the transformation in the using process, and the installation and use difficulty is higher. And the simultaneous shutdown and maintenance of a plurality of devices of a large-scale chemical enterprise can not be met, and the simultaneous maintenance of dozens of units can be performed, so that the maintenance is busy and disorderly, the quality and the safety are influenced, and the management is not facilitated.

the utility model discloses a device that axle ware was lifted to horizontal centrifugal pump of ordinary structure lifts an axle device (the grant bulletin number is CN203568809U) as utility model patent that patent number is 201320760811.2, the device includes the supporting leg, the lower part jackscrew roof beam, the upper portion hoisting beam, U type promotes the ring, jackscrew handle and jackscrew, lower part jackscrew roof beam bottom both sides are equipped with the supporting leg, be equipped with upper portion hoisting beam on the middle part top surface of lower part jackscrew roof beam, lower part jackscrew roof beam and upper portion promote roof beam bottom center and are equipped with U type hoisting ring, upper portion promotes the roof beam top and is equipped with the jackscrew, be equipped with the jackscrew handle in the jackscrew. The device simple structure can avoid the damage to equipment spare part. However, the rotor may be deviated during the lifting process of the rotor, which may affect the accuracy of the measured data and the assembly and disassembly of the parts such as the bearing bush.

for example, in the 2014 maintenance of an ethylene GB501 compressor, the lower tile back of the radial tile at the positioning end is napped and seized in the tile turning process due to the reason that the shaft lifter cannot center and the self weight of a rotor is overlarge, so that the whole maintenance is very passive. With the development of petrochemical enterprises, the increase in size of equipment and the frequent maintenance are the future trends, so it is necessary to design a shaft lifter capable of aligning.

Therefore, a shaft lifting device is disclosed in a utility model patent with the patent number ZL201820563025.6 (the publication number is CN208249839U) and is used for lifting and adjusting the position of a rotor rotating shaft, and comprises a shaft lifting false tile and an adjusting mechanism, wherein the shaft lifting false tile is in a structure matched with the rotor rotating shaft and is arranged below the rotor rotating shaft; the adjusting mechanism is at least partially arranged below the shaft lifting false tile to adjust the position of the shaft lifting false tile, and the adjusting mechanism is a threaded rod or a pneumatic telescopic piece or a hydraulic telescopic piece. This patent is through adjusting adjustment mechanism to ensure that the rotor left and right sides position is central, but, this adjustment mechanism of manual control or manual regulation needs during the in-service use, and it is loaded down with trivial details to implement, and has human error.

SUMMERY OF THE UTILITY MODEL

the utility model aims to solve the technical problem to prior art's current situation provides one kind and can realize automatic aligning, and then improves lifting axle ware of unit maintenance efficiency and security.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: an axle lifter, comprising:

The cross beam is used for crossing and supporting on the bearing seat;

The lifting device is arranged on the cross beam and used for lifting the rotor;

the method is characterized in that: the two ends of the beam are supported on the bearing seats through respective rolling bodies and can move along the length direction of the bearing seats, and the lifting device comprises:

The lifting mechanism is supported at a position on the cross beam corresponding to the upper part of the rotor, and the output end of the lifting mechanism extends vertically upwards and can move up and down to realize lifting; the output end is provided with a fixed pulley;

At least two tensioning pieces are arranged on the cross beam and are distributed in bilateral symmetry by taking the lifting mechanism as a center;

The bearing strip is used for supporting the rotor, is in an end-to-end annular structure, is wound on the fixed pulley, the tensioning members on the left side and the right side and the lifted rotor, and can rotate anticlockwise or clockwise along the fixed pulley and the tensioning members under the inclined state of the lifted rotor so as to realize tightness adjustment.

As an improvement, the bearing seat further comprises supporting pieces for supporting on two sides of the bearing seat, and the rolling bodies are positioned between the cross beam and the supporting pieces. Therefore, the distance between the cross beam and the bearing seat can be increased while the bearing seat is protected from being damaged.

in order to realize further smooth centering and improvement, the rolling bodies are rolling shafts. Of course, the rolling bodies can also be balls, and the like, as long as the driving of the beam on the supporting piece can be realized.

And the improvement is that the two ends of the beam are respectively connected with a connecting block, and the rolling shaft is horizontally arranged between the connecting block and the supporting piece and is in rolling connection with the connecting block and the supporting piece.

In order to limit the rolling shaft, the bottom of the connecting block is provided with a long groove into which the rolling shaft is horizontally inserted, the height of the long groove in the vertical direction is smaller than the diameter of the rolling shaft, and the bottom of the rolling shaft is exposed out of the long groove and is in rolling fit with the top surface of the supporting piece under the condition that the rolling shaft is positioned in the long groove. Therefore, the rolling shaft is accommodated in the long groove and cannot be lost, and can freely roll in the long groove.

The further improvement is that the top surface of the supporting piece is provided with a limit groove for limiting the moving distance of the rolling shaft. Make the connecting block only can remove in the spacing inslot, prevent that it from slipping from support piece, improved the stability of structure.

in the above-mentioned scheme, for reducing frictional force, the tensioning member is preferably the tensioning sprocket, and this tensioning sprocket is adjustable in position on the crossbeam to adjust the distance about between tensioning sprocket and the elevating system as required. The position can be adjusted according to the size of rotor to span adjustable tensioning sprocket structure, and then opens the bearing strip, offsets the huge frictional force that the bearing strip produced the rotor in use, reduces the impaired degree in rotor surface, prolongs the life-span of rotor. Meanwhile, the universal capacity of the equipment can be improved through span adjustment, special and other key parts can be avoided, and the practicability and the safety are improved.

Preferably, the cross beam comprises two unit beams which are arranged in parallel at intervals in the front-back direction, the tension sprocket is supported between the two unit beams through a pin shaft, the two unit beams are provided with corresponding pin holes for inserting the two ends of the pin shaft, and the pin holes are provided with a plurality of pairs and are distributed at intervals along the length direction of the unit beams. The span adjustment is realized by selecting a proper pin hole for splicing, and the implementation is convenient.

In the above scheme, for further being convenient for the aligning, the fixed pulley is the sprocket, the bearing strip is the chain, and this chain is around establishing on this sprocket.

The lifting mechanism is preferably a screw jack which is good in stability in the working process, and the screw jacks of different sizes can be selected according to the weight of the rotor. Of course, the lifting mechanism can also be a hydraulic cylinder, a pneumatic cylinder or the like.

Compared with the prior art, the utility model has the advantages of: the lifting device is provided with a lifting mechanism supported on the beam, a tensioning piece arranged on the beam and a bearing strip wound on the output end of the lifting mechanism and the tensioning piece, the beam is provided with a structure capable of moving left and right along the length direction of the beam, so that under the state that the rotor is inclined, the bearing strip on the inclined side is in a tensioned state and extrudes the tensioning piece on the inclined side, the tensioning piece drives the cross beam to move, the rotor and the bearing strip can swing left and right under the action of self gravity, the shaft lifter has the function of automatic centering, better solves the problems of sealing and difficult bearing part disassembly and assembly due to eccentricity of the rotor in the lifting process, improves the unit maintenance efficiency, and improves the safety in the maintenance process; just the utility model discloses a lift the lifting gearing and the bearing strip that the axle ware can select different bearing capacity according to the weight of rotor, size, and then the commonality is better, is convenient for use, is applicable to the maintenance and transformation of examining of the large-scale rotating equipment in each field such as large-scale oil refining, chemical industry, medicine, electricity generation.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an exploded perspective view of a support member, a rolling element and a connecting block according to an embodiment of the present invention;

fig. 3 is an exploded perspective view of the lifting mechanism in the embodiment of the present invention;

fig. 4 is an exploded perspective view of a tension sprocket according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 4, in an embodiment of the present invention, the shaft lifter is used to lift the rotor 300 in the bearing seat 200, and includes a cross beam 1, a lifting device, a supporting member 2 and a rolling element 3.

The supporting members 2 are two supporting blocks supported on the left and right sides of the bearing seat 200, the cross beam 1 spans the bearing seat 200, and both ends of the cross beam 1 are supported on the bearing seat 200 through the supporting members 2 and can move on the supporting members 2 along the length direction of the cross beam 1. In order to realize easy movement, in this embodiment, two ends of the beam 1 are respectively supported on the supporting member 2 through respective rolling bodies 3, and two ends of the beam 1 are respectively connected with the connecting blocks 7, the connecting blocks 7 are detachably connected with the beam 1, and the rolling bodies 3 are horizontally arranged between the connecting blocks 7 and the supporting member 2 and are in rolling connection with the connecting blocks 7 and the supporting member 2. The method specifically comprises the following steps: the rolling element 3 is a rolling shaft, the connecting block 7 is in a convex structure, the bottom of the connecting block is provided with a long groove 71 which is used for the rolling shaft to be horizontally inserted and extends forwards and backwards, the height of the long groove 71 in the vertical direction is smaller than the diameter of the rolling shaft, and the bottom of the rolling shaft is exposed out of the long groove 71 and is matched with the top surface of the supporting piece 2 in a rolling way under the condition that the rolling shaft is positioned in the long groove 71, so that the rolling shaft is accommodated in the long groove 71 and cannot fall out, and can be matched with the top surface of the supporting piece 2 to. To further improve the structural stability, the rollers are sleeved at both ends with first retaining rings 33 to prevent the rollers from moving back and forth in the elongated slots 71. The top surface of the supporting piece 2 is provided with a limiting groove 21 for limiting the moving distance of the rolling shaft, so that the rolling shaft can only move left and right in the limiting groove 21, and the moving distance of the cross beam 1 is further limited. In this embodiment, each connecting block 7 is provided with three parallel rollers, and if the stress point is not concentric with the rotor 300 in the process of bearing the shaft lifter, the rollers roll to realize centering. See fig. 1 and 2 for details. Of course, the rolling elements 3 are not limited to rollers, and balls or the like may be used.

As shown in fig. 1, the beam 1 includes two unit beams 10 arranged in parallel at intervals in front and back, and the connection structure between the unit beams 10 and the connection block 7 is: the connecting block 7 is located between the two unit beams 10, the front side face and the rear side face of the connecting block 7 are respectively connected with the two unit beams 10 through the first bolts 8, and the two unit beams 10 are respectively supported on two sides of the connecting block 7. The stress fulcrum of the beam 1 can be adjusted, and the beam can be used on equipment with different diameters. In the embodiment, tests show that the bearing capacity of the cross beam 1 is safe under the weight of 8t through the test of hydraulic equipment. And according to the size of the unit, the cross beams with different sizes and bearing capacities can be selected.

as shown in fig. 1 and 3, the lifting device is provided on the beam 1 for lifting the rotor 300, and includes a lifting mechanism 4, a tension member 5, and a load-bearing bar 6. The lifting mechanism 4 is supported on the beam 1 at a position corresponding to the upper part of the rotor 300 (in this embodiment, the lifting mechanism 4 is disposed at the center of the beam 1 and can be detached from the beam 1), the output end 41 of the lifting mechanism extends vertically upward and can move up and down to realize lifting, and the output end 41 of the lifting mechanism 4 is provided with a fixed pulley. In this embodiment, the fixed pulley is sprocket 44, elevating system 4 chooses screw jack for use, install the sprocket assembly who has sprocket 44 on elevating system 4's the output 41, this sprocket assembly is including supporting the atress base 42 on output 41, vertical setting is at the baffle 43 on atress base 42 front and back both sides, and connect the sprocket 44 between two baffles 43, this sprocket 44 rotates through dabber 45 to be connected in the middle of baffle 43, specifically be dabber 45 front and back extension, its both ends are connected on baffle 43 through second bolt 46, and the cover is equipped with adjusting shim 47 on the second bolt 46, sprocket 44 cover is established on dabber 45, and spacing through second retaining ring 48, in order to inject the position of sprocket 44 on dabber 45.

the tension members 5 are at least two and are respectively arranged on the beam 1 and distributed in bilateral symmetry by taking the lifting mechanism 4 as a center; in this embodiment, the tension member 5 is a tension sprocket, and the position of the tension sprocket on the cross beam 1 is adjustable to adjust the left-right distance between the tension sprocket and the lifting mechanism 4 as required. The concrete structure is as follows: the number of the tension sprockets is two, the tension sprockets are supported between the two unit beams 10 through the pin shafts 51, the two unit beams 10 are provided with corresponding pin holes 100 for inserting the two ends of the pin shafts 51, and the pin holes 100 are provided with a plurality of pairs and are distributed at intervals along the length direction of the unit beams 10. Please refer to fig. 1 and 4 specifically.

The bearing strip 6 is used for supporting the rotor 300, is of an end-to-end annular structure, is wound on the fixed pulley, the tensioning members 5 on the left side and the right side and the lifted rotor 300, and can rotate anticlockwise or clockwise along the fixed pulley and the tensioning members 5 under the deflection state of the lifted rotor 300, so that the tightness adjustment of the bearing strip 6 is realized; in this embodiment, the load-bearing bar 6 is a chain, which goes around the sprocket 44 and the two tension sprockets on the output end 41 and then hangs down freely under its own weight, and passes through the gap between the two unit beams 10 to support the rotor 300. The bearing strip 6 is a key part for lifting the rotor, the selection of the type of the chain is strictly according to the stress capacity of the chain on a manual, and the bearing capacity is absolutely greater than the self weight of the rotor. In the embodiment, the chain is LH166/BL566, and is used in a single-strand load bearing 6t and double-strand use. The rotor dead weight is 12.5t, and the unilateral weight is 6.25 t. Of course, the load-bearing strip 6 may be a steel rope or other strip-shaped object with good load-bearing capacity.

In the state of deflection of the lifted rotor 300, one side of the load-bearing bar 6 is in tension and presses the tension member 5 of the side; crossbeam 1 that links to each other with tensioning 5 can remove to the extrusion direction along the length direction of this crossbeam 1 under the squeezing action of bearing strip 6, crossbeam 1 that moves drives bearing strip 6 and rotor 300 and removes, rotor 300 can appear the yaw because of the inertia effect in the removal process, the rotor 300 of yaw can drive the rotation of 6 small-ranges of bearing strip, and then make the bearing strip 6 of taut side can the diastole, it is balanced to reach the same the tensioning force of 6 both sides of bearing strip, accomplish the automatic aligning of rotor 300. Of course, due to the weight of the rotor 300 and the structure of the shaft lifter, the amplitude of the left-right swing of the rotor 300 is small, and the rotor 300 swings back and forth left and right to realize the centering.

And the distance between two tension sprockets can be adjusted according to the size of the rotor 300, when the diameter of the rotor 300 is larger, the distance between the tension sprockets can be increased, and then the contact area between the bearing strip 6 and the rotor 300 is reduced. Therefore, the universal capacity of the equipment can be improved through adjusting the distance between the two tension sprockets, the key parts of special equipment can be avoided, and the practicability and the safety are improved. And the tensioning chain wheel can offset the huge friction force generated by the bearing strip 6 in use by rolling, so that the surface damage degree is reduced, and the service life is prolonged.

In the embodiment, the beam 1, the lifting device, the supporting piece 2 and the rolling body 3 can be disassembled and assembled, so that the maintenance and storage in the later period are very convenient, the occupied space is small, and the transportation is convenient.

The shaft lifter of the embodiment has been subjected to practical verification in 2018 Zhenhai refining ethylene overhaul, and the special tool plays an important role in overhaul of the whole project in the whole overhaul, particularly in the overhaul process of a GB501 propylene refrigeration compressor. Under the condition that the back of a radial tile at the rear end is napped and bitten in 2014, the whole tile mounting and dismounting process is very easy in this year, and no jam occurs in one time during repeated mounting and dismounting, so that the maintenance quality is ensured, and the maintenance efficiency is improved. Meanwhile, the whole dry gas seal is also assembled and disassembled. In the same way, the condition of galling of a sealing cavity occurs in GB501 dry gas seal disassembly in 2014, and the whole dry gas seal is assembled and disassembled smoothly under the condition that other conditions are not changed in the year. According to preliminary calculation, compared with the overhaul in 2014, the set of shaft lifting device is used in the same process, so that the overhaul time of at least 3 days is saved. The 3 days account for 1/9 of the whole overhaul period, the value of the embodied cost per unit reaches 300 thousands from the production value, and the values of other aspects such as safety, quality and the like cannot be calculated.

Claims

1. An axle lifter, comprising:

The cross beam is used for crossing and supporting on the bearing seat;

2. the shaft lifter according to claim 1, characterized in that: the rolling bearing further comprises supporting pieces used for supporting two sides of the bearing seat, and the rolling bodies are located between the cross beam and the supporting pieces.

3. The shaft lifter according to claim 2, characterized in that: the rolling body is a roller.

4. The shaft lifter according to claim 3, characterized in that: the two ends of the cross beam are respectively connected with a connecting block, and the rolling shaft is horizontally arranged between the connecting block and the supporting piece and is in rolling connection with the connecting block and the supporting piece.

5. The shaft lifter according to claim 4, wherein: the bottom of the connecting block is provided with a long groove for the horizontal insertion of the rolling shaft, the height of the long groove in the vertical direction is smaller than the diameter of the rolling shaft, and the bottom of the rolling shaft is exposed out of the long groove and is in rolling fit with the top surface of the supporting piece under the condition that the rolling shaft is positioned in the long groove.

6. The shaft lifter according to claim 5, wherein: and the top surface of the supporting piece is provided with a limiting groove for limiting the moving distance of the rolling shaft.

7. The shaft lifter according to claim 1, characterized in that: the tensioning member is a tensioning chain wheel, and the position of the tensioning chain wheel on the cross beam is adjustable, so that the left-right distance between the tensioning chain wheel and the lifting mechanism can be adjusted according to needs.

8. the shaft lifter according to claim 7, wherein: the cross beam comprises two unit beams which are arranged in parallel at intervals in the front-back direction, the tensioning chain wheel is supported between the two unit beams through a pin shaft, the two unit beams are provided with corresponding pin holes for inserting the two ends of the pin shaft, and the pin holes are provided with a plurality of pairs and distributed at intervals along the length direction of the unit beams.

9. The shaft lifter according to claim 1, characterized in that: the fixed pulley is a chain wheel, the bearing strip is a chain, and the chain is wound on the chain wheel.

10. the shaft lifter according to claim 9, wherein: the lifting mechanism is a screw jack.