The driving mechanism of bypass reversing baffle plate of waste heat boiler
Technical field
The present invention relates to the reversible deflector on exhaust heat boiler bypass three-way diverter valve, specifically the driving mechanism of reversible deflector.
Background technique
Bypass reversing baffle plate of waste heat boiler is the reversible deflector door with an entrance and two outlets.Baffle door adopts horizontal installation form, can make the flue gas level lead to exhaust heat boiler or vertically lead to bypass duct, but can't close simultaneously two outlets, guarantees the safe operation of combustion machine.
The triplet commutation baffle plate comprises three-way body and the reversible deflector that sets within it, and by rotating reversible deflector, can realize the commutation of flue gas.Reversible deflector switching manipulation demand motive mechanism realizes, it is the commutation with an entrance and two outlets because of reversible deflector, therefore the reliability of its driving mechanism is related to the Security of whole system, in prior art, the driving mechanism of reversible deflector in use for some time, does not live washing away of flue gas because bearing owing to working for a long time in corrosive environment, cause the driving mechanism of reversible deflector to come off, affect reliability.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of driving mechanism that is applied on bypass reversing baffle plate of waste heat boiler is provided, it is simple and reliable for structure, and good seal performance can prevent effectively that extraneous dust from entering, long service life.
According to technological scheme provided by the invention, the driving mechanism of bypass reversing baffle plate of waste heat boiler is characterized in that: comprise torque tube, front support seat, front-end bearing pedestal, front axle, fore bearing, bonnet, rear bearing, rear bearing block, rear support seat and rear axle; Front support seat, rear support seat are welded on respectively on the front and back side external surface of three-way body, and front-end bearing pedestal, rear bearing block are contained in respectively in front support seat, rear support seat and fix; Described front axle supports to be assemblied in front-end bearing pedestal and by front black box by fore bearing and seals, and described rear axle supports to be assemblied in rear bearing block and by bonnet by rear bearing and seals; Described torque tube two ends are fixedly connected with front axle, rear axle respectively, and the driving wheel that rotates for driving front axle, torque tube and rear axle is installed on front axle, and described torque tube is used for connecting reversible deflector.
As a further improvement on the present invention, described front-end bearing pedestal and rear bearing block are all flanged bearing supports; Described front black box comprises packing ring, follower, clamping ring, seal ring, Hough circle and guard ring, follower is connected with the flange of front-end bearing pedestal by bolt, be provided with packing ring and guard ring between follower and front-end bearing pedestal, guard ring is contained on front axle, and packing ring is clamped between follower and front-end bearing pedestal, and described clamping ring, seal ring and Hough circle are contained in follower, clamp by clamping ring the seal ring both sides, seal ring internal surface and front axle Surface Contact, the Hough circle is contained in outside seal ring, is used for being close to seal ring; Described bonnet is connected with the flange of rear bearing block by bolt.
As a further improvement on the present invention, described reversible deflector is provided with for the arm of turning round that connects torque tube, turns round the arm front end and is provided be used to the circular hole that is enclosed within on torque tube, turns round arm and torque tube is welded to connect.
As a further improvement on the present invention, described turning round also is welded with stiffening plate on arm and torque tube.As a further improvement on the present invention, be respectively installed with front shaft sleeve, rear axle housing and connect by flat key on described front axle, rear axle; Described torque tube two ends are set on front shaft sleeve, rear axle housing, connect and are welded and fixed by pin.
The present invention compared with prior art, advantage is: the present invention is simple and reliable for structure, good seal performance can prevent effectively that extraneous dust from entering, long service life.
Description of drawings
The structural representation of Fig. 1 driving mechanism.
Fig. 2 is the local enlarged diagram of A section in Fig. 1.
Description of reference numerals: 1-torque tube, 2-front shaft sleeve, 3-front support seat, 4-front-end bearing pedestal, 5-packing ring, 6-follower, 7-front axle, 8-driving wheel, 9-clamping ring, 10-seal ring, 11-Hough circle, 12-guard ring, 13-fore bearing, 14-bonnet, 15-rear bearing, 16-rear bearing block, 17-rear support seat, 18-rear axle, 19-rear axle housing, 20-pin, 21-flat key, 22-turn round arm, 23-stiffening plate.
Embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
As shown in the figure: driving mechanism of the present invention is used for driving the reversible deflector of three-way diverter valve, and it mainly is comprised of component such as torque tube 1, front shaft sleeve 2, front support seat 3, front-end bearing pedestal 4, packing ring 5, follower 6, front axle 7, clamping ring 9, seal ring 10, Hough circle 11, guard ring 12, fore bearing 13, rear bearing 15, rear bearing block 16, rear support seat 17, rear axle 18, rear axle housing 19, pin 20 and flat keys 21.
As shown in Figure 1, front support seat 3, rear support seat 17 are welded on respectively on the front and back side external surface of three-way body, and front-end bearing pedestal 4, rear bearing block 16 are contained in respectively in front support seat 3, rear support seat 17 and are welded and fixed; Described front axle 7 is assemblied in front-end bearing pedestal 4 and by front black box by fore bearing 13 supportings and seals, and described rear axle 18 is assemblied in rear bearing block 16 and by bonnet 14 by rear bearing 15 supportings and seals; Described torque tube 1 two ends are fixedly connected with front axle 7, rear axle 18 respectively, by flat key, the driving wheel 8 that rotates for driving front axle 7, torque tube 1 and rear axle 18 are installed on front axle 7, and described torque tube 1 is used for connecting reversible deflector 22.
As shown in Figure 1, described reversible deflector is provided with turns round arm 22 for what connect torque tube 1, turns round arm 22 front ends and is provided be used to the circular hole that is enclosed within on torque tube 1, turns round arm 22 and is welded to connect with torque tube 1.In order further to improve the linkage structure intensity of turning round between arm 22 and torque tube 1, described turning round on arm 22 and torque tube 1 also is welded with stiffening plate 23.
The Placement of described torque tube 1 and front axle 7, rear axle 18 is respectively installed with front shaft sleeve 2, rear axle housing 19 and connects by flat key 21 as shown in Figure 1 on front axle 7, rear axle 18; Described torque tube 1 two ends are set on front shaft sleeve 2, rear axle housing 19, connect and are welded and fixed by pin 20.
as shown in Figure 1 and Figure 2, described front-end bearing pedestal 4 and rear bearing block 16 are all flanged bearing supports, described front black box is mainly by packing ring 5, follower 6, clamping ring 9, seal ring 10, Hough circle 11 and guard ring 12 form, follower 6 is connected by the flange of bolt with front-end bearing pedestal 4, be provided with packing ring 5 and guard ring 12 between follower 6 and front-end bearing pedestal 4, guard ring 12 is contained on front axle 7, packing ring 5 is clamped between follower 6 and front-end bearing pedestal 4, described clamping ring 9, seal ring 10 and Hough circle 11 are contained in follower 6, clamp by clamping ring 9 seal ring 10 both sides, seal ring 10 internal surfaces and front axle 7 Surface Contacts, Hough circle 11 is contained in outside seal ring 10, be used for being close to seal ring 10, described bonnet 14 is connected by the flange of bolt with rear bearing block 16.