CN201405309Y

CN201405309Y - Synchronous screwing device for connecting main shaft tightening ring with screw bolt

Info

Publication number: CN201405309Y
Application number: CN2009200730263U
Authority: CN
Inventors: 李圣用
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-05-27
Filing date: 2009-05-27
Publication date: 2010-02-17
Anticipated expiration: 2019-05-27

Abstract

The utility model discloses a synchronous screwing device for connecting main shaft tightening ring with screw bolt, which comprises a device body, an express connector, a lower supervoltage sealing ring, a cylinder drawing head, an upper supervoltage sealing ring, a sleeve restoring spring, an elastic collar, a retainer, a sleeve, a locating locking nut and a stretching screw bolt, wherein the cylinder drawing head is installed on the device body matching with the lower supervoltage sealing ring and the upper supervoltage sealing ring, the sleeve is installed on the device body matching withthe sleeve restoring spring and the elastic collar, and the locating locking nut is screwed on the stretching screw bolt, and is matched with screw threads of a tightening ring for use during working.The synchronous screwing device for connecting main shaft tightening ring with screw bolt of the utility model improves the mounting efficiency of an electric generator and a gear case connecting with a main shaft tightening ring bolt in screwing work during the general assembling process of a draught fan.

Description

The main shaft synchronous screwing device of connecting bolt of expanded ring

Technical field

The utility model relates to and is used for fastening, connection, dismounting or clamping tools or bench device, particularly a kind of main shaft synchronous screwing device of connecting bolt of expanded ring is applicable to the tightening synchronously of connecting bolt of the main shaft distensible ring that 750KW and 1.5MW wind power generating set motor are connected with gear-box.

Background technology

In industrial design, the main shaft that a lot of generators are connected with gear-box is to adopt the distensible ring retaining mechanism.For example: the main shaft that the generator shaft of wind power generating set is connected with gear-box just adopts this mechanism, and one has 24 or 28 bolts on its annular wedge ring, and finally requiring screwing torque is 1100Nn ~ 1650Nm.Because this interconnection technique is to utilize the relative displacement of annular wedge ring and distensible ring, compress main shaft, thereby reach the purpose that is connected of motor and gear-box, thereby make distensible ring hold uniform displacement with respect to annular wedge environmental protection so require each bolt to tighten uniformly, need definitely avoid dislocation, otherwise annular wedge ring will be out of shape and causes part to be scrapped.

Present tightening method is to use single of manual torque wrench, aerodynamic moment spanner or hydraulic torque wrench (or symmetric double) and symmetry to tighten each bolt, produce even displacement in order to reach distensible ring with respect to annular wedge ring, so can not expire disposable the twisting of the moment of torsion of bolt, but require only to add about 100Nm at every turn, and twisted need repeated examinations behind all bolts and guarantee each bolt at the moment of torsion of setting without any mobile (normal condition need be checked about 20 times); Guarantee that every bolt does not have could add the 100Nm moment of torsion again after the displacement, repeat front work then.One has the main shaft distensible ring connecting bolt work of tightening of 28 bolts to need work usually 12 ~ 15 hours, and add moment of torsion at every turn and begin bolt when tightening work, all be at annular wedge type block unbalance loading situation bottom offset in fact, need overcome the very big frictional force that produces owing to unbalance loading, so the load (axial force) that each bolt bore on the wedge ring of finally tightening is unequal.

New forms of energy are all being greatly developed in the China and even the whole world at present, but new forms of energy are the most ripe and economical with wind generating technology again.In the total process of assembling of blower fan, generator is connected main shaft distensible ring bolt with gear-box the work of tightening is a difficult problem always, and its installation work-hour is oversize and specification requirement is high again, has become a bottleneck that is difficult to break through of blower fan general assembly work.

In sum, the problem that prior art mainly exists is: 1, the load that each bolt bore on the annular wedge ring is inhomogeneous, directly influences the quality that is connected and installed of main shaft; 2, tightening 28 annular wedge collar bolts needs 12 ~ 15 hours, and inefficiency has become a bottleneck that is difficult to break through of wind power generating set assembly working.

The utility model content

For overcoming the deficiency of above-mentioned prior art, the technical problems to be solved in the utility model provides a kind of main shaft synchronous screwing device of connecting bolt of expanded ring.When using this device, use earlier the stretch bolt (pulling force that same part needs is identical) of half quantity of the tensile force of appraising and deciding, draw one every one, distensible ring is displaced to the position of technological requirement uniformly, uses hydraulic spanner then the disposable technological requirement moment of torsion that tightens to of every bolt symmetry on the annular wedge ring.Use the utility model device only to need 40 minutes, whole erection work can be finished.

For solving the problems of the technologies described above, the technical solution of the utility model is:

A kind of main shaft synchronous screwing device of connecting bolt of expanded ring is characterized in that comprising device body, snap joint, bottom superhigh pressure sealing circle, oil cylinder drawing head, top superhigh pressure sealing circle, sleeve return spring, elastic collar, back-up ring, sleeve, positioning locking nut and tensile bolt;

Wherein oil cylinder drawing head cooperates bottom superhigh pressure sealing circle and top superhigh pressure sealing circle to be installed on the device body, sleeve cooperates sleeve return spring and elastic collar to be installed on the device body, the positioning locking nut is screwed on the tensile bolt, the threaded engagement use in when work with distensible ring.

Described oil cylinder drawing head has 14.

Described sleeve, sleeve return spring and elastic collar respectively have 12.

Compared with prior art, the beneficial effects of the utility model are:

When installation 1.5MW generator of wind generating set is connected the connecting bolt of main shaft distensible ring with gear-box, use the utility model main shaft synchronous screwing device of connecting bolt of expanded ring, can make the installation under uniform load of 28 bolts within 40 minutes.Use the utility model main shaft synchronous screwing device of connecting bolt of expanded ring that main shaft distensible ring connecting bolt is installed, under the situation of guaranteeing installation quality fully, installation effectiveness has been improved more than 12 times.The utility model main shaft synchronous screwing device of connecting bolt of expanded ring has solved in the total process of assembling of blower fan, and generator is connected the difficult problem in the work of tightening of main shaft distensible ring bolt with gear-box.

Description of drawings

Fig. 1 is the integral planar schematic diagram of the synchronous device for screwing up of the utility model;

Fig. 2 is the decomposing schematic representation of the synchronous device for screwing up of the utility model;

Fig. 3 is the partial sectional view of the device body in the synchronous device for screwing up of the utility model;

Fig. 4 is the cutaway view of the sleeve in the synchronous device for screwing up of the utility model.

Label declaration in the accompanying drawing:

1, device body

2, snap joint

3, bottom superhigh pressure sealing circle

4, oil cylinder drawing head

5, top superhigh pressure sealing circle

6, sleeve return spring

7, elastic collar

8, back-up ring

9, sleeve

10, positioning locking nut

11, tensile bolt

The specific embodiment

Below in conjunction with drawings and Examples the specific embodiment of the present utility model is further described in detail, but should limit protection domain of the present utility model with this.

See also Fig. 1 and Fig. 2.Fig. 1 is the integral planar schematic diagram of the synchronous device for screwing up of the utility model; Fig. 2 is the decomposing schematic representation of the synchronous device for screwing up of the utility model.The utility model main shaft synchronous screwing device of connecting bolt of expanded ring comprises device body 1, snap joint 2, bottom superhigh pressure sealing circle 3, oil cylinder drawing 4, top superhigh pressure sealing circle 5, sleeve return spring 6, elastic collar 7, back-up ring 8, sleeve 9, positioning locking nut 10, tensile bolt 11.Wherein 14 oil cylinder drawings 4 cooperate bottom superhigh pressure sealing circles 3 and top superhigh pressure sealing circle 5 to be installed on the

device body

1,12 sleeves 9 cooperate 12 sleeve return springs 6 and elastic collar 7 to be installed on the device body 1, positioning locking nut 10 is screwed on the tensile bolt 11, the threaded engagement use in when work with distensible ring.

The main shaft synchronous screwing device of connecting bolt of expanded ring in use, the general hydraulic mechanism of one cover is connected by the synchronous device for screwing up of oil pipe and this, oil sector is to device body 1 oiling of synchronous device for screwing up, promote oil cylinder drawing 4 motion, oil cylinder drawing 4 a promotion tensile bolt 11, tensile bolt 11 pulling distensible ring motions make annular wedge ring be inserted into distensible ring, reach purpose of connecting thereby make distensible ring hold main shaft tightly.

Introduce the using method of main shaft synchronous screwing device of connecting bolt of expanded ring below.

Connecting bolt with at present common in the world 1.5MW wind driven generation set main shaft distensible ring is installed as example, and one has 28 bolts.As shown in Figure 3 and Figure 4.Use the installation method of main shaft synchronous screwing device of connecting bolt of expanded ring may further comprise the steps:

1, main shaft is connected with annular wedge ring 12 with distensible ring 13 and puts in place.

2, every the bolt of individual half quantity of pretension, this moment, annular wedge ring 12 was 20 ~ 23mm with the relative distance of distensible ring 13, and took off the bolt that other half quantity does not have pretension.

3, the main shaft synchronous screwing device of connecting bolt of expanded ring is placed on the annular wedge ring 12, and high-intensity tensile bolt 11 is installed in the screwed hole that takes down bolt, and tensile bolt 11 is fully contacted with the device body of main shaft synchronous screwing device of connecting bolt of expanded ring.

4, use superpressure oil pump, snap joint 2 by oil pipe is injected hydraulic oil in the device body 1 of main shaft synchronous screwing device of connecting bolt of expanded ring, make each oil cylinder drawing axial tensile force of appraising and deciding of 4 generations (14 altogether), thereby make the displacement about generation 20 ~ 23mm uniformly of the annular relatively wedge ring 12 of distensible ring 13.

5, use hydraulic torque wrench (or other similar constant torque wrenches) by the disposable moment of torsion that tightens to technological requirement of symmetry one by one of 14 bolts of 9 original pretensions of sleeve.

6, lay down 14 high-intensity tensile bolts 11, and take off the main shaft synchronous screwing device of connecting bolt of expanded ring.

7, reinstall 14 bolts that before taken off.

8, use hydraulic torque wrench (or other similar constant torque wrenches) the disposable moment of torsion that tightens to technological requirement of symmetry one by one of these 14 bolts.

9, use hydraulic torque wrench (or other similar constant torque wrenches) to use the moment of torsion of technological requirement this 28 bolts check one by one a time.The whole erection process finishes.

This main shaft synchronous screwing device of connecting bolt of expanded ring can be suitable for more bolt by the quantity of the oil cylinder drawing on the modifier body 14 and tighten occasion synchronously; If the device body 1 of this device is split into independent several, also can reach same percentage and tighten effect synchronously.

The above is preferred embodiment of the present utility model only, is not to be used for limiting practical range of the present utility model.Have in the technical field under any and know the knowledgeable usually, in not breaking away from spirit and scope of the present utility model, when being used for a variety of modifications and variations, therefore protection domain of the present utility model is as the criterion when looking claims institute confining spectrum.

Claims

1, a kind of main shaft synchronous screwing device of connecting bolt of expanded ring is characterized in that comprising device body (1), snap joint (2), bottom superhigh pressure sealing circle (3), oil cylinder drawing head (4), top superhigh pressure sealing circle (5), sleeve return spring (6), elastic collar (7), back-up ring (8), sleeve (9), positioning locking nut (10) and tensile bolt (11);

Wherein oil cylinder drawing head (4) cooperates bottom superhigh pressure sealing circle (3) and top superhigh pressure sealing circle (5) to be installed on the device body (1), sleeve (9) cooperates sleeve return spring (6) and elastic collar (7) to be installed on the device body (1), positioning locking nut (10) is screwed on the tensile bolt (11), the threaded engagement use in when work with distensible ring.

2, main shaft synchronous screwing device of connecting bolt of expanded ring according to claim 1 is characterized in that described oil cylinder drawing head has 14.

3, main shaft synchronous screwing device of connecting bolt of expanded ring according to claim 1 is characterized in that described sleeve, sleeve return spring and elastic collar respectively have 12.