CN2405064Y

CN2405064Y - One-way rotating brake

Info

Publication number: CN2405064Y
Application number: CN 99238383
Authority: CN
Inventors: 吴定华
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-08-25
Filing date: 1999-08-25
Publication date: 2000-11-08
Anticipated expiration: 2009-08-25

Abstract

The utility model relates to a one-way rotating brake used for preventing the large scale equipment, such as a boiler blower, from operating against the wind along the wind when turned off. The utility model comprises a casing seat, and an eccentric shaft which can rotate flexibly is arranged along the circumference track in the casing seat. One end of the casing seat is also provided with a clutch of the eccentric shaft. The utility model is arranged in the point of a coupling between the blower and a drive device, and the eccentric shaft is matched with the outer circle of the coupling and prevents the reverse rotation when the blower is turned off through the wedge-caulking effect of the eccentric shaft. The utility model has the advantage of simple structure, reliable operation and safe and convenient use.

Description

Unidirectional swing brake

The utility model relates to a kind of some main equipments such as boiler fan unidirectional swing brake of reverse running with the wind when shutting down that is used for preventing.

In occasions such as power station, heat supplies, in order to guarantee the continuous operation of boiler supply air system, usually need two gas fan alternations, because the shared supply air duct of two typhoon machines, as shown in Figure 1, out-of-work air-supply unit tends to be subjected to the distinguished and admirable influence in shared air channel and the phenomenon that produces antikinesis.Antikinesis not only causes the loss of the energy also to bring heel and toe wear to unit.

The purpose of this utility model is to design at the similar problem of above-mentioned existence a kind of unidirectional swing brake of the gas fan antikinesis that prevents to stop transport.

The technological scheme that realizes the utility model purpose is as follows: include a chassis block 8, install the eccentric shaft 7 that can rotate flexibly along a circular path in chassis block, eccentric shaft is by the bearing supporting at chassis block two ends.

When the utility model uses,, make the cylindrical phase configuration of eccentric shaft and coupling 2, and make eccentric shaft be in left and right sides bias state its coupling 2 places that are installed in gas fan 5 and drive unit 1.When blower fan 5 work operations, because the effect of frictional force drives eccentric shaft deflection, its deflection radius that contacts with coupling is diminished, keep a kind of half contact condition to each other, to guarantee the normal operation of blower fan; When blower fan quits work, and because in the shared supply air duct 6 when distinguished and admirable effect and reverse running, drive eccentric shaft deflection by coupling, this moment is because switched in opposite, it is big that the contact radius of eccentric shaft becomes, produce the effect of eccentric wedging, can reach the purpose of braking coupling reverse rotation, thereby prevent to stop transport the antikinesis of gas fan under the alternation state.The utility model is arranged at the coupling place of air blower machine set structure profile minimum, not only possessed with the big characteristics of little system, and also simple and compact for structure, reliable working operation is used easy-to-operate.Use of the present utility model can reduce the energy loss of supply air duct for two gas fans of a shared supply air duct alternation, the heel and toe wear of the unit of avoiding blowing.The utility model can not only be applied to the supply air system in power station, also can be widely used in other similar occasion.

Fig. 1 is that two shared supply air ducts of gas fan and the utility model are installed and used the structural diagrams of position, and number in the figure 3 is the utility model, and label 4 is a bearing support.

Fig. 2 is an embodiment's of the utility model a positive view, also is the A-A sectional view among Fig. 4.

Fig. 3 is for shifting out C behind the cover plate among Fig. 4 to view.

Fig. 4 is the B-B revolved sectional view among Fig. 2.

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing, has the chassis block 8 to cuing open formula about, eccentric shaft 7 is installed with the circular path of coupling cylindrical phase configuration in the edge in chassis block, the eccentric shaft two ends are by bearing 15 supportings, eccentric shaft can be established the 6-12 root usually, the contact of eccentric shaft 5 coupling cylindricals when avoiding fan operation, can one eccentric shaft engaging and disengaging gear be set at chassis block one end, the end that it is included in eccentric shaft connects fork 13, and configuration return spring 14, dispose a dial circle 11 in the inboard of each eccentric shaft fork, one side of the periphery upper pendulum bar of dial circle is installed on shifting block 12, and the dial circle links by the pull bar 10 of its driving lever and electromagnet 9, constitutes the eccentric shaft engaging and disengaging gear, this device installation is an end in chassis block, its outside configuration cover plate 16.The working procedure of eccentric shaft engaging and disengaging gear is: when blower fan does not turn round, the shifting block of dial circle is thrown off mutually with fork, this moment, eccentric shaft contacted with coupling, be in the wedging state, when fan operation, to dial transfer coil by electromagnet and make fork to rotating with wedging direction opposite direction, the contact radius that makes eccentric shaft and shaft coupling hold cylindrical diminishes, be disengaged condition, thereby realize the clutch of eccentric shaft.

Claims

1, a kind of unidirectional swing brake is characterized in that including a chassis block (8), installs the eccentric shaft (7) that can rotate flexibly along a circular path in chassis block, and eccentric shaft is by the bearing supporting at chassis block two ends.

2, by the described unidirectional swing brake of claim 1, it is characterized in that one eccentric shaft engaging and disengaging gear being set at chassis block one end.

3, by claim 1 or 2 described unidirectional swing brakes, it is characterized in that chassis block (8) be about to cuing open formula.

4, by the described unidirectional swing brake of claim 2, it is characterized in that described eccentric shaft engaging and disengaging gear is included in the end connection fork (13) of eccentric shaft, and configuration return spring (14), dispose a dial circle (11) in the inboard of each eccentric shaft fork, one side of the periphery upper pendulum bar of dial circle is installed on shifting block (12), and the dial circle links by the pull bar (10) of its driving lever and electromagnet (9).

5,, it is characterized in that eccentric shaft (7) establishes the 6-12 root by claim 1 or 2 described unidirectional swing brakes.