JPS61229997A - Blower - Google Patents

Abstract

PURPOSE:To enable the smooth start and operation of a stopped blower, by applying a part of the wind pressure of a working blower to the stopped blower to slowly rotate the drive section of the stopped blower. CONSTITUTION:Funnel-shaped guide pipes 17a, 17b are provided in the central portions of partition plates 8a, 8b. Wind quantity regulation valves 18a, 18b are provided in the central portions of the guide pipes 17a, 17b. The front openings of the guide pipes 17a, 17b are almost perpendicularly opposed to the fins 13, 14 of fans 3, 6 when the partition plates 8a, 8b are closed. A part of the wind pressure of a working blower is applied to the fins 13, 14 of a stopped blower through the guide pipes 17a, 17b to slowly rotate the drive section of the stopped blower. The drive section stopped for a long time is thus protected from rust and damage.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is an air-cooled cooling system for a phase separation bus, particularly in a device for a regular or standby blower. , is about prevention.

[Conventional technology]

FIG. 8 is a plan sectional view showing a conventional blower device, and FIG. 4 is a side sectional view, in which C1) is a regular electric motor, and (2) is a single rotation shaft 14 fixed to a regular electric motor +13 and a regular fan 133.
), and (5) is a lever for rotating the partition plate (8a) rotatably mounted on the fulcrum (7a) to switch the air path of the regular fan (3) and standby fan (6). (9
a) and a partition plate (8'b) rotatably installed on the fulcrum (7'b).
This is a switching/halving pump equipped with a rod αQ that connects the lever (9b) of the item b). The fourth side is the intake port of the regular fan (3 and spare 7η・n...) (6), the rumored a3a is the NT fin of the regular fan (3) and the spare 7 asia (6),
(6) is a backup electric motor.

Next, the operation will be explained. By rotating the regular electric motor (IT) counterclockwise, the regular fan (3) rotates in the opposite direction, and the air sucked in from the intake port cIη is compressed and tries to flow out toward the switching damper (5). At this time, the partition plate (8a) rotates counterclockwise around the fulcrum (7a) due to wind pressure. Along with this movement, the partition plate (8
The partition plate (8b) is rotated counterclockwise via the cap rad αq connected to the lever (9a) of a), thereby sealing the air supply port of the backup fan (6). Due to this operation, the wind pressure generated by the regular fan t33 passes through the switching damper (5),
It flows out to the air outlet αQ. - 10,000, when the regular electric motor +11 is stopped and the standby electric motor (g) is driven, the operation is the opposite of the above.

[Problem that the invention seeks to solve]

Conventional blowers are constructed as described above, so when either part of the regular or backup blower is stopped for a long period of time, the radial load applied to the rotating shaft and bearings, which are the driving parts, is concentrated at one point. Damage such as deformation occurs. In addition, rust occurs on the bearings and sliding parts, making it difficult to operate smoothly during operation.

This invention was made in order to solve the above-mentioned problems, and it is possible to keep the stopped blower always rotating at a low speed due to the wind pressure generated by the operation while the blower is in operation. The purpose of this invention is to enable smooth starting and operation of a stopped blower when switching the operation of a regular use blower and a standby blower.

[Means for solving problems]

゛ The blower device according to the present invention is provided with a switching damper for switching the air path between the exhaust ports of the regular blower and the standby blower, and a guide pipe is attached to the center of a partition plate rotatably attached to the switching damper. The guide pipe is equipped with a volume adjustment valve for adjusting the air volume and shutting off the wind pressure.

[Effect]

In this invention, the wind pressure generated by the blower while it is being driven passes through the guide tube and hits the fins of the blower when it is not running, causing the fan to always rotate at low speed. Prevents damage and deformation of the rotating shaft.

In addition, the rotational speed of the stopped fan can be adjusted using the air volume adjustment valve provided in the guide pipe, and the fan can be completely stopped by shutting off the wind pressure.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 and the second factor, +II A-06 is the same as the above-mentioned conventional device. (17a) (17b) is the partition plate (
8 &) (81)) is a funnel-shaped guide pipe fixed in the center, and this guide pipe has a wind jl adjustment valve (tea) in the center.
(18b), and the opening at the tip thereof is a partition plate (8a).
) (8b) is in the closed state, the fins (13 (14) of the fan 137 [6) are arranged at substantially right angles to the same position.

As described above, by providing a guide pipe on the partition plate of the air path switching damper provided in the blower device configured for regular use and backup use, a part of the wind pressure generated by any one of the 10,000 blowers during operation can be reduced. The guide tube (1) fixed to the partition plate (8a) (8b)
71L) By forcibly hitting the fins of the stopped fan in (17b), the stopped fan will rotate at a low speed. In addition, by opening and closing the air volume adjustment valves (18a) (18b) provided in the guide pipe, the fan can be easily started and stopped when it is stopped. Note that this guide tube has a very simple structure, so it can be easily attached to a conventional blower device.

〔Effect of the invention〕

As described above, according to the present invention, the stopped blower and drive motor can always be rotated at low speed with a simple structure in which a guide pipe is attached to the partition plate of the air path switching damper, so that the blower and drive motor can always be rotated at low speed. It is possible to prevent rust and damage to the internal drive unit and deformation of the rotating shaft, and to reduce the starting current that occurs when starting a stopped blower.

In addition, when performing maintenance and inspection on a stopped blower, the air volume adjustment valve shuts off the wind pressure and the fan can be completely stopped, making work safer, making the equipment cheaper, and :! High accuracy can be obtained.

[Brief explanation of drawings]

FIG. 1 is a plan sectional view showing a blower device according to an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 8 is a plan sectional view showing a conventional blower device, and FIG. 4 is a side view thereof. FIG. In the figure, (3) is a regular blower, (5J is a switching damper, (6-eye spare blower, (8m) and (8b) is a partition plate,
(17a) (17b) is the guide tube, (1g&) (18
b) is an air volume adjustment valve.

Claims (3)

[Claims] (1) In a blower system equipped with regular and backup blowers, a part of the wind pressure of the blower in use is applied to the blower when it is stopped, and the drive unit of the blower when it is stopped is rotated at a low speed. Characteristic blower device. (2) A guide pipe is installed on the partition plate of the damper that switches the air path of the regular and standby blower, so that part of the wind pressure of the blower in use passes through this guide pipe and rotates the drive part of the blower when it is stopped. An air blowing device according to claim 1, characterized in that: (3) The blower device according to claim 2, characterized in that the guide pipe is provided with an air volume adjustment valve.