CN201092511Y - Girder structure used for lifting large-scale generator - Google Patents

Abstract

The utility model discloses a beam structure for lifting large motors, wherein the beam is C-shaped, the C-shaped beam is in a structure of hollow constant-section box shape, the inner side of the C-shaped beam is provided with a rib plate, the distance of the inner sides of the upper supporting arm and the lower supporting arm of the C-shaped beam is longer than the maximum radial size of the upper portion of the motor stator, the lengths of the upper supporting arm and the lower supporting arm of the C-shaped beam are not longer than the axial size of the inner hole of a long shaft, the rib plate at the inner side of the upper supporting arm of the C-shaped beam is provided with an arc groove. When in use, the beam structure can reduce distance in space, namely can reduce 1.7m installment space along the axis of the motor and can quickly and safely realize through-core installment of a stator and a rotor in the base concave of the lower motor, while the installment effect can reach national standard, with saved manual power and machine resource, reduced operation period, strong operability and better effect.

Description

The beam-shaped structure that is used for hanging large-scale electric motor

Technical field

The utility model relates to the parts in a kind of hanging large-scale electric motor equipment, relates in particular to a kind of ellbeam of metallurgical four roller heavy and medium plate mills with large-size machine equipment that be used for lifting.

Background technology

At two main drive motors that metallurgy industry four roller heavy and medium plate mills are used, generally be that the horizontal motor room that is installed in is striden, that is: earlier that motor stator is in place, rotor installs the spreading axle additional then, penetrates the method in the motor stator thorax again.At present, the two main drive motors of four roller heavy and medium plate mills generally are that the horizontal motor room that is installed in is striden.Motor room is striden only has equipment to install and one in overhead traveling crane crane of maintenance, roller motor is preceding (is preceding near milling train) under arrangement is, last roller motor is when the back, just above-mentioned horizontal installation method can not have been adopted, its major cause: the one,, because equipment single-piece weight is big, the fabricating yard is narrow, the driving tonnage is less than the total weight of stator and rotor, and motor can not carry out the punching assembling in addition in the installation site; The 2nd,, owing to blocking of last motor basis, following rotor piercing core hanging can only penetrate motor stator by (milling train side) driving end direction, but factory building width and overhead traveling crane crane dolly end position can not satisfy the required space requirement of employing piercing core hanging.Therefore,, can not be directly the rotor of adjunction major axis be penetrated in the motor stator in the thorax less than following this present situation of motor punching limit size at present factory building span with the overhead traveling crane crane.

The utility model content

In order to overcome existing drawback in the above-mentioned prior art, in less space, carry out hanging large-scale electric motor in order to adapt to, the utility model provides a kind of beam-shaped structure that is used for hanging large-scale electric motor, adopt this structural beams shape to lift and to solve in the prior art owing to the horizontally-mounted problem of large-size machine can not be taked inadequately in the locus, can be implemented under the condition of factory building span less than following motor punching limit size, with the overhead traveling crane crane rotor of adjunction major axis is penetrated in the motor stator in the thorax, thus hanging large-scale electric motor.Adopt the utility model beam-shaped structure can be in the motor foundation pit fast and safely realization the stator and rotor piercing core hangings, and reached the national regulation requirement.

The utility model is used for the technical scheme that the beam-shaped structure of hanging large-scale electric motor is achieved, the c-shaped beam of this beam shape, this C ellbeam is hollow uniform cross section box type construction, described C ellbeam inboard is provided with gusset, distance between the upper and lower support arm of the described C shape fine strain of millet inboard is slightly larger than the maximum radial dimension on motor stator top, and the length of the upper and lower support arm of described C ellbeam is equal to or slightly less than the axial dimension of spreading axle endoporus.

C ellbeam of the present utility model, wherein, the gusset that is positioned at described C shape fine strain of millet upper branch arm inboard is provided with arc groove.

The beam-shaped structure that the utility model is used for hanging large-scale electric motor compared with prior art, its beneficial effect is: in the hanging large-scale electric motor process, adopting C ellbeam structure of the present utility model is on the basis of the large-size machine piercing core hanging method of prior art, changed the punching order of stator and rotor, that is: adopt elder generation that rotor is put on motor base one end, then motor stator is enclosed within the non-transmision end axle of rotor, utilize again the C ellbeam with the spreading axle in the motor stator thorax, and with rotor non-transmision end axle be connected the punching method.Thereby solved preferably because the problem of factory building width and traverse crane dolly end position out of reach motor piercing core hanging requisite space position dimension.

Description of drawings

Fig. 1-the 1st, the utility model are used for the front view of the beam-shaped structure of hanging large-scale electric motor;

Fig. 1-2 is the lateral plan of beam-shaped structure shown in Fig. 1-1;

Fig. 1-the 3rd, the birds-eye view of beam-shaped structure shown in Fig. 1-1;

Fig. 1-the 4th, the cross section of beam-shaped structure A-A shown in Fig. 1-1 enlarged drawing;

Fig. 2 is the constitution diagram that utilizes equalizing bar lifting rotor;

Fig. 3-the 1st utilizes the constitution diagram of beam-shaped structure lifting motor stator as Figure 1-1;

Fig. 3-the 2nd, the partial enlarged drawing of beam-shaped structure shown in Fig. 3-1 and electronics stator and spreading axle mutual alignment;

Fig. 4 is the diagram of circuit that adopts the utility model beam-shaped structure piercing core hanging large-scale electric motor.

Be the explanation of main Reference numeral in the utility model Figure of description below:

1---motor stator 2---rotor 3---spreading axle

4---C ellbeam 5---equalizing bar 6---first bracing frames

7---second bracing frame 8---jack 9---steel ropes

10---driving 11---motor basis 12---space end positions

13---rotor axial line of centers 14---insertion rotor direction 15---jacks

Thorax longitudinal center line in 16---plain cushion iron 17---stator

The specific embodiment

Below in conjunction with accompanying drawing the beam-shaped structure that the utility model is used for hanging large-scale electric motor is described in further detail.

The utility model is used for the beam-shaped structure of hanging large-scale electric motor, shown in Fig. 1-1, Fig. 1-2, Fig. 1-3 and Fig. 1-4, this beam-shaped structure is the C ellbeam, constitute hollow uniform cross section box type construction by the steel plate welding, the inboard of C ellbeam is provided with the reinforcement gusset, for steady more, reliable in the hoisting process, be provided with arc groove at the gusset that is positioned at described C shape fine strain of millet upper branch arm inboard, so that the jack operation.Distance between the upper and lower support arm of the described C shape fine strain of millet inboard is slightly larger than the maximum radial dimension on motor stator top, and the length (referring to free length) of the upper and lower support arm of described C ellbeam is equal to or slightly less than the axial dimension of spreading axle endoporus, shown in Fig. 3-2.

Utilizing the utility model beam-shaped structure to cooperate relatedly in the hanging device piercing core hanging large-scale electric motor has related parameter and technological condition as follows:

(1) cut deal four-high mill main gear 7000KW frequency changer circuit frequency-changing speed-regulating synchronous motor, band Backpack type air/water cooler forced ventilation mode in the employing, motor two ends air intake, middle air-out.Motor stator adopts integral structure, has on the electric baseboard of the recessed base plate of endoporus in the middle of motor stator is fixed on.Two main driving motors are arranged in the motor room, up-down rollers motor radial center linear distance 7155mm, and the height of center of every motor is 800mm, last motor height of center is in following motor center.

(2) electrical motor and connection auxiliary overall dimensions are: the long 2960mm of motor stator, wide 3900mm, high 3435mm, internal diameter are φ 2630mm; The long 7058mm of rotor, external diameter φ 2606mm; Spreading axial length 1690mm; The axially long 7155mm of following motor foundation pit; The plane is than the high 2350mm in plane on the following electric baseboard on the last electric baseboard; The equipment that is provided with in the motor room is installed and one in 100t/20t overhead traveling crane crane of maintenance.

(3) main driving motor is horizontal installation, arrangement for following roller motor preceding (is preceding near milling train), last roller motor after mounting means.Adopt earlier rotor is put into down on the electric baseboard with foundation pit in two bracing frames on, the non-transmision end shaft extension that then motor stator is enclosed within rotor is also filled up, and utilizes C ellbeam and 5T jack that the non-transmision end shaft extension bonded assembly method of spreading axle and rotor is carried out the piercing core hanging method again in the motor stator thorax.

The step of employing the utility model beam-shaped structure cooperation hanging device piercing core hanging large-scale electric motor may further comprise the steps as shown in Figure 4

At first, as 201 steps, dead work before lifting, get lifting required equipment and auxiliary ready, such as: 100t/20t overhead traveling crane crane, equalizing bar 5, C ellbeam 4, bracing frame, jack 8, steel rope 9, jack 15 peaceful parallels 16 etc., and the forward and backward bearing seat of motor (comprising various pads) that will install, adjust carries out mark, is placed on a side of electric baseboard after the dismounting.

Then, shown in 202 and 203 steps,, be placed on (end position of driving dolly) 13 foremost on motor basis 11, and support firm with first bracing frame 6 and second bracing frame 7 with rotor 2 under equalizing bar 5 liftings.Determine motor stator 1 fore-and-aft direction, with driving 10 motor stator 1 sling, rotor 2 is inserted according to inserting rotor direction 14, that is: rotor 2 non-transmision end side shafts are put in motor stator 1 thorax, fall within then on 4 contour strong points forming by jack 15 peaceful parallels 16 on the sole plate.Adjust the quantity of the height peace parallels 16 of first bracing frame 6, second bracing frame 7, jack 15, motor stator 1 interior thorax longitudinal center line 17 is overlapped with rotor axial line of centers 13.

Next, shown in 204 steps, spreading axle 3 is sling, with jack 8 and steel rope 9 balancings with C ellbeam 4.Find accurately behind the equilibrium point in spreading axle 3 shift-in motor stators 1 thorax, make the bolt hole of spreading axle 3 corresponding one by one, and connect with rotor shaft non-transmision end bolt hole.

Shown in 205 steps, lifting rotor 2 after spreading axle 3 is connected firmly with rotor 2 utilizes the dolly of traverse crane 10 to carry out punching, treats after spreading axle 3 passes motor stator 1 rotor 2 to be fallen to being placed on first bracing frame 6 and second bracing frame 7.

Shown in 206 steps, the steel rope 9 of spreading axle 3 one sides on the hyperphoric equalizing bar 5, lifting finds balance again.After treating rotor 2 balances, utilize the moving driving of artificial disc 10 dollies that rotor 2 is penetrated motor stator 1.When penetrating, rotor 2 to tightly note the gap between motor stator 1 and the rotor 2, usually this gap value is controlled at 1-20 millimeter scope, be preferably 10 millimeter, about between electronics stator 1 and the rotor 2, front and back and about gap value equate substantially, the level that keeps rotor 2 with equalizing bar 5 is with steady, and prevent to wound coil of stator of motor and steel rope 9 are reined in bad motor-spin-coil end.

Shown in 207 steps, when spreading axle 3 reaches space end position 12, temporarily rotor 2 is dropped in motor stator 1 thorax.With driving 10 spreading axle 3 is removed, the punching of again rotor 2 usefulness equalizing bars 5 being sling puts in place.

Shown in 208 steps, after rotor 2 punchings put in place, utilize jack and jack 8 that antero posterior axis bearing installation in position is aligned, use mechanical jack peace parallels whereabouts motor stator on 4 strong points again, travelling crane hook whereabouts rotor, both fall simultaneously, and control rate equates, prevents collision.When motor stator 1 and rotor 2 drop to the appropriate location, fitting surface to base and motor stator 1 footing carefully cleans, check bolt, and on screw thread, be coated with lubricating oil, be ready to the bearing cap shim of motor stator 1 base, last, shown in 209 steps, lentamente motor stator 1 and rotor 2 are fallen within respectively on base plate and the bearing seat, thereby finish the piercing core hanging work of motor.

Implementation result: adopt the utility model beam-shaped structure to carry out hanging large-scale electric motor, decreased distance spatially is promptly along the installing space that dwindles nearly 1.7m on the motor axial direction; In addition, fast and safely realization stator and rotor piercing core hanging in following motor foundation pit, it is installed effect and has reached country and test assessment of bids standard, and saves manpower and machine resource in hoisting process, has shortened construction period, and it is workable, and is respond well.

Comprehensive above-mentioned example can see that the utility model is applicable to the piercing core hanging of large-size machine, as: be used for metallurgical four roller heavy and medium plate mill large-size machine piercing core hangings.Although in conjunction with the accompanying drawings the utility model has been carried out foregoing description; but the utility model is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; under the situation that does not break away from the utility model aim and claim institute protection domain, can also make a lot of distortion, these all belong to the row of protection of the present utility model.

Claims (2)

1. beam-shaped structure that is used for hanging large-scale electric motor, it is characterized in that: described beam shape is c-shaped, this C ellbeam is hollow uniform cross section box type construction, described C ellbeam inboard is provided with gusset, distance between the upper and lower support arm of the described C shape fine strain of millet inboard is slightly larger than the maximum radial dimension on motor stator top, and the length of the upper and lower support arm of described C ellbeam is equal to or slightly less than the axial dimension of spreading axle endoporus.

2. beam-shaped structure according to claim 1 is characterized in that: the gusset that is positioned at described C shape fine strain of millet upper branch arm inboard is provided with arc groove.

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