KR20100036299A

KR20100036299A - The structure of rack and pinion gear type at the guillotine damper

Info

Publication number: KR20100036299A
Application number: KR1020100024325A
Authority: KR
Inventors: 박흥규
Original assignee: 주식회사 삼우파워시스템
Priority date: 2010-03-18
Filing date: 2010-03-18
Publication date: 2010-04-07

Abstract

PURPOSE: A damper vertically opened with a rack-and-pinion mechanism is provided to keep accurate power transmission and balance and enable operation of the damper without torque and clearance deviation. CONSTITUTION: A vertically opened damper employs a driving method in which a power transmission driving unit transmits power directly to a blade(7) through gears. The damper is composed of a shaft connecting a motor(1) to a gear box, and a rack gear(6) fixed to the blade. The power of the motor is reduced through the gear box and the reduced power is transmitted through a pinion gear(5) to the rack gear to be moved vertically. Therefore, accurately equal power is transmitted to both sides.

Description

The Structure of Rack and Pinion Gear Type at The Guillotine Damper}

The present invention relates to a structure of a guillotine damper (hereinafter referred to as a damper) for blocking the flow of hot gas and high pressure, and more specifically, a pinion gear connected to an extended shaft in a motor for driving the damper. It is a drive system that transmits power and converts rack gear fixed to both ends of the blade into vertical movement. It maintains accurate power transmission and balance, and enables the drive of dampers without torque and play variation. It is a groundbreaking rack and pinion gear guillotine damper that can be applied up to and can be used even at high temperatures of gas and dust.

It is an invention that can solve the malfunction and maintenance problems caused by the gas and dust, which is a weak point of the conventional damper, and the motor and motor gearbox driving part attached to the outside, the rack and the pinion gear which is driven inside and are maintained for each part This is a gas, dust, and high temperature damper that makes maintenance easy and the internal drive section also opens inspection doors so that inspection and maintenance can be easily carried out to reduce costs such as maintenance and to prevent the operation rate from dropping dramatically.

Conventionally, the damper is driven by a ring cage method or a chain gear method of the louver damper to drive the damper to cause a solidification phenomenon due to gas and dust, and to open and close the blade due to thermal expansion. The accuracy of opening and closing due to the error of the operation is an invention that can solve the problem by a direct operation method using the rack and pinion gear as the present invention devised.

In general, dampers are used to control the amount and pressure of flue (exhaust) gas installed in power plants and large plant installations and used in the exhaust of harmful gases and hot and high pressure airflows.

In the related art, a louver damper shown in FIG. 1 has been used to control high-temperature, high-pressure flue gas.

As shown, the louver damper A1 has one blade plate A2 coupled to the rotating shaft A3, and the flue gas passes and is blocked by the rotation of the blade plate A2.

The louver damper (A1) is a blade plate of one layer because the high-temperature flue gas of about 300 ~ 500 through the blade plate (A2) and the high pressure of the fan (High Pressure-up to 1500 mmAq) is passed through the blade plate (A2) There was a problem that thermal deformation is inevitable due to the structure made of (A2).

In addition, the blade plate (A2) has a plurality of blades to adjust the deviation of the working distance between the link arm connected to the link arm, the gap between the blade (A2) and the blade gap due to the severe adjustment of the linkage gap. There is a lot of gas leaks, the clearance of the blade (A2) is generated and the gap adjustment is impossible in the state that the boiler and the like can not be confirmed after the operation.

As a result, an eccentricity is generated between the rotating shaft A3 and the blade plate A2, and cracks are generated in the blade plate A2, thereby making it impossible to reuse. In addition, the phenomenon that the gas is leaked due to the phenomenon that the foreign matter such as gas dust is attached and is not closed completely when closing (Close). Therefore, the cost of maintenance increases because it must be used to replace it, there was a problem that the operation rate is reduced by the time required for replacement.

The present invention has been devised to solve the problems of the prior art, the present invention uses only one blade provided with a reinforcing beam to prevent deformation in one or two layers of blades, the force transmission drive of the damper and the blade is directly forced The shaft is connected to the motor and the gearbox by the driving method, and the rack gear of the blade connected to the pinion gear is largely structured so that the rotational ratio of the power generated from the motor through the gearbox is fixed to the blade through the pinion gear. The rack gear is driven directly.

The driving force generated from the motor is transmitted to the pinion gear by the rotational movement, and the pinion gear is attached to the blade to drive the fixed rack gear in the up and down linear motion so that the blade is directly driven to operate the blade with accurate power transmission. It is the invention of the guillotine damper structure of rack and pinion gear to simplify and control.

The guillotine damper is a direct drive system that can solve the error of operation caused by the conventional damper. It prevents environmental pollution due to gas leakage due to the error of operation and minimizes the deformation of the damper. And it can significantly reduce the cost of repair, and can be restarted immediately after maintenance and repair, thereby preventing the reduction in the operation rate due to the replacement time.

1 is a perspective view of a louver damper conventionally used.
Figure 2 is a plan view of a rack and pinion gear large guillotine damper according to an embodiment of the present invention.
Figure 3 is a perspective view of the rack and pinion gear connection structure according to an embodiment of the present invention.
Figure 4 is a plan view of the rack and pinion gear connection structure according to an embodiment of the present invention.
5 is an exploded view of a rack gear and guillotine damper fixedly attached to a large blade according to an embodiment of the present invention.
6 is a plan view of the rack and pinion gear small guillotine damper of the shaft direct connection method according to an embodiment of the present invention.

According to a feature of the invention for achieving the object of passing and blocking the gas and hot air stream as described above,

2, 5, and 6, the blade 7 is largely disposed as the blade 7, the lower casing 8, and the upper casing 9 so that the blade 7 is in the lower casing state when the blade 7 is closed. It goes down to 8) to block the flow of gas and hot air flow (FLOW GAS), the open state (OPEN) allows the blade (7) to rise into the upper casing (9) to pass through the flow gas.

When the blade structure is described, one blade (7) provides a simple operating state by controlling the two operating points of the open and closed state, the blade reinforces the section steel on a single blade (7) to prevent thermal deformation It is a blade (7) structure that prevents heat deformation by fixing the structure and two layers of blade plate to supply seal air into the inside. Is fixed.

The rack gear 9 of the blade 7 can be used for a large guillotine damper as long as it is installed as shown in FIG. 3, and the rack gear 9 can be used for a small guillotine damper as shown in FIG. 6. have.

2, the rotational power generated by the motor 1 is transmitted to the drive shaft 3, and the rotational power is generated from the connected reducer 2 to the end shaft 4 of FIG. 3. Rotational power is transmitted to the pinion 5 gear which is fixed by the flat key 12 to the longitudinal axis 4.

The pinion gear 5 to which the rotational power is transmitted is geared to the rack gear 6 fixedly attached to the blade 7 as shown in FIGS. 3 and 4 when the pinion gear 5 is rotated to rotate the rack gear 6. It is a structure for directly operating the blade 7 by linearly moving upward or downward.

3 and 4 are a perspective view and a plan view in which the shafts 3 and 4 through which power is transmitted are fixed to the pinion gear 5 to be engaged with the rack gear 6 fitted into the up and down linear motions.

5 is an exploded perspective view of a large guillotine damper largely divided into a blade 7 and a fixed rack gear 6, a lower casing 8, and an upper casing 9.

FIG. 6 is a plan view showing the connection of the drive unit of the pinion 5 gear and the rack gear directly connected to the motor 1 by a small guillotine damper.

The stuffing box 10 of FIG. 6 is installed in the driving shaft 3 of FIG. 6 and the driven shaft 4 of FIG. 3 to prevent gas leakage from the outside through the guillotine damper, and prevents gas leakage. 2, 5, 6 as shown in the check hole 14 for maintenance and inspection was installed to reduce the maintenance cost.

In addition, the connection shape of the flange 13 and the duct (year) of the large or small guillotine damper is a rectangular flange 13 structure as shown in FIGS. 2 and 5 and a circular flange 13 as shown in FIG. You can change the structure.

The present invention is the invention of the guillotine damper using the direct power to convert the rotational driving force into a linear motion to the rack gear (6) using the pinion gear (5) in the structure of the guillotine damper.

A1: louver damper
A2: blade plate
A3: axis of rotation
1: Electric Actuator
2: reducer
3: drive shaft
4: driven shaft
5: pinion gear
6: rack gear
7: blade
8: lower casing
9: upper casing
10: stuffing box
11: bearing
12: Puke
13: Flange for duct connection
14: access door
FLOW GAS: Movement direction of high temperature harmful gas such as flue gas exhaust

Claims

The present invention has a large structure made of a rack gear fixed to the blade connected to the shaft, the pinion gear and the shaft connecting the motor and the gearbox in a direct drive by transmitting power directly to the blade from the power transmission drive unit of the damper occurs in the motor The reduced power through the gearbox is attached to the blade through the pinion gear to transfer the fixed rack gear in linear motion, and the exact same power is transmitted to both sides of the pinion gear and the rack gear. Guillotines for racks and pinion gears that operate the blades by applying the front gear power drive method for the small guillotine damper that directly connects the motor and shaft pinion gear to the side, and the side gear drive method that can be used for the large guillotine damper. The invention of the damper structure.