JP2001355456A - Ventilating damper opening/closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and manually open/close a ventilating damper 6 of a gas turbine enclosure 2 in emergency. SOLUTION: This ventilating damper opening/closing device manually opens/ closes the louver type ventilating damper 6 provided for ventilating the interior of an enclosure 2 provided surrounding a driving gas turbine 1, and actuated by a pneumatic actuator 6d for opening/closing by rotating a plurality of blades 6b. A rotary shaft 6p of the actuator 6d direct-coupled to a rotary shaft 6c of the blades, and a manual handle 10 provided outside of the enclosure 2, are connected to each other through a universal joint 12 with an intermediate shaft formed as a spline shaft 13, and a pair of air piping 6s connected to the actuator 6d are connected to each other through by-pass piping 6f having a by-pass valve 6g provided outside of the enclosure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilating damper for manually opening and closing a damper for ventilating an enclosure of a marine gas turbine used in ships and the like when a power source such as a power failure or compressed air is lost. Related to the device.

[0002]

2. Description of the Related Art A gas turbine is obtained by removing a fan and a fan driving turbine of a jet engine developed for aviation, and a power turbine is attached to a downstream of the gas generator to generate power. That. Aircraft diverted gas turbines have features such as light weight, small size, large output, and rapid acceleration / deceleration, so they are suitable for main engines for high-speed ships. Not only small ships such as hovercraft, hydrofoils, and high-speed boats but also up to about 20,000 tons It is widely used mainly for ships ranging from large and medium-sized ships. The gas turbine used for large ships uses a package system with an enclosure to improve the environment of the engine room for both heat and sound, so that it can be operated not only remotely but also on the aircraft side. Has become.

FIG. 3A is a side sectional view of such an enclosure, and FIG. 3B is a view taken along the line BB of FIG. 3A. In the figure, reference numeral 1 denotes a gas turbine, and an output shaft 1
a. Reference numeral 2 denotes an enclosure having a box shape made of a steel plate, and a heat insulating material stretched inside. Reference numeral 3 denotes an intake chamber which sends combustion air taken from the intake port 3a to the turbine 1. Reference numeral 4 denotes an exhaust chamber that discharges exhaust gas from the turbine 1 to the outside through an exhaust port 4a. Reference numeral 5 denotes a ventilation port, and a ventilation damper 6 is provided immediately below. The air (indicated by a dotted line) sucked into the enclosure 2 from the ventilation port 5 passes around the turbine 1 and is discharged outside through a discharge port 4b around an exhaust port 4a. The reason why the ventilation port 5 is provided to ventilate the inside of the enclosure 2 is to prevent heat damage to the auxiliary equipment attached to the main engine of the gas turbine due to heat radiation from the turbine 1 disposed in the enclosure 2, and the provision of the ventilation damper 6. This is to prevent the spread of the fire by shutting off the air supply in an emergency such as a fire.

FIG. 4A is a rear view of the ventilation damper 6, and FIG. 4B is a plan view. The ventilation damper 6 is a louver type, and a plurality of ventilation dampers 6 (5 in this example) are mounted on a square frame 6a.
Wings 6b, and the wings 6b are rotatable about a rotation shaft 6c. 6d is a pneumatically-actuated actuator, and the rotary shaft 6p of the actuator 6d
And the rotating shaft 6c of the central blade 6b are directly connected. As shown in FIG. 4, an arm 6q is fixed to the rotating shaft 6p of the actuator 6d, and the arm 6q is engaged with the piston rod 6r, and the reciprocating motion of the piston rod 6r causes the rotating motion of the rotating shaft 6p. Is converted to Each slat 6b
The rotation shaft 6c is extended to the back side, and the arms 6j are fixed thereto.
k is engaged. Therefore, when the center blade 6b is rotated, all the other blades 6b rotate in conjunction therewith. 6
m is a limit switch for detecting the opening and closing of the blade.

FIG. 5 is a flowchart showing the operation of the actuator 6d. As shown in the figure, the actuator 6d
Is operated by the solenoid valve 6e. 6h is an accumulator, 6i is a check valve, and the accumulator 6h
Is provided for operating the actuator 6d when the air source stops.

When one or both of the compressed air for opening and closing the ventilation damper 6 and the electricity for operating the solenoid valve 6e are stopped due to a failure or the like, the ventilation damper 6 is manually opened and closed. Must-have. To open and close the ventilation damper 6 manually, the actuator 6d
The ratchet handle may be attached to the extended portion 6n on the near side of the rotating shaft 6p and turned. At this time, if the air is trapped in the actuator 6d, the ratchet handle cannot be turned, so that the bypass valve 6g provided in the bypass pipe 6f is opened to communicate both air inlets of the actuator 6d.

In order to mount or rotate the ratchet handle, a worker must enter the enclosure 2;
The inside of the enclosure 2 is hot, the scaffold is poor, and the work is unpleasant because it is dark.

In order to solve such a problem, the present applicant has filed a patent invention and filed a patent application earlier (Japanese Patent Laid-Open No. 2000-
No. 45788). The contents will be described below. FIG.
FIG. 4 is a plan view of a manual handle. As shown in FIGS. 2, 3, and 4, a ventilation port 5 for ventilating the inside of an enclosure 2 provided to surround the driving gas turbine 1;
A louver-type ventilation damper 6 is provided immediately below. The ventilation damper 6 opens and closes by rotating a plurality of blades 6b by a pneumatic actuator 6d. When the air pressure or electricity stops due to a failure, the ventilation damper 6 is manually operated.
Open and close.

In FIG. 2, reference numeral 10 denotes an automatic handle;
Is a universal joint. The manual handle 10 is provided through an opening 2a formed in the enclosure 2 and is supported by a bearing 10a fixedly provided outside the opening 2a. The manual handle 10 and the extension 6n on the near side of the rotation shaft 6p of the actuator 6d are connected via a universal joint 11, and when the manual handle 10 is rotated, the rotation shaft 6p of the actuator 6d rotates, The rotation shaft 6c of the central blade 6b directly connected thereto rotates. Each slat 6b
Are connected via the arms 6j and the connecting plate 6k, so that when the central blade 6b is rotated, all the blades 6b are rotated.

A bypass valve 6g of a bypass pipe 6f for connecting the air pipes 6s connected to the actuator 6d is provided near the manual handle 10 outside the enclosure 2, though not shown in the drawing.

An actuator 6d for opening and closing the ventilation damper 6
A rotary valve 6g is connected to a manual handle 10 provided outside the enclosure 2 via a universal joint 11 and a pair of air pipes 6s connected to an actuator 6d are provided outside the enclosure 2 by a bypass valve 6g. Connected via the bypass pipe 6f having
When the ventilation damper 6 is manually opened and closed in an emergency, the worker can perform the operation outside the enclosure 2.

[0012]

The enclosure 2 has a thin steel panel structure, and the side, ceiling and front panels are connected by bolts and assembled.
The enclosure 2 is slightly positive pressure, and the enclosure 2 is deformed due to a temperature change and a reaction force from the gas turbine 1. However, the bearing 10 supporting the manual handle 10 and the rotating shaft 6p of the actuator 6d
The dimension between the front side and the extension portion 6n on the front side is restricted by the universal joint 11, so that a large stress is generated in the universal joint 11 in the axial direction, and the handle 10 cannot be easily moved manually. Was.

The present invention has been devised in view of the above-mentioned problems of the prior art, and provides a ventilating damper opening / closing device in which a large axial stress is not generated in a universal joint and a handle can be easily turned manually. The purpose is to do.

[0014]

In order to achieve the above object, a ventilation damper opening / closing device according to the present invention is provided for ventilating an inside of an enclosure provided around a driving gas turbine, and comprises a plurality of blades. A ventilation damper opening / closing device for manually opening / closing a louver-type ventilation damper operated by a pneumatic actuator that opens and closes by rotating the actuator, and a manual operation provided outside the enclosure and the rotation axis of the actuator directly connected to the rotation axis of the blade. The handle and the intermediate shaft were connected via a universal joint having a spline shaft, and a pair of air pipes connected to the actuator were connected via a bypass pipe having a bypass valve provided outside the enclosure. Things.

Next, the operation of the present invention will be described. A bypass pipe having a bypass valve in which a rotation shaft of an actuator for opening and closing a ventilation damper and a manual handle provided outside the enclosure are connected via a universal joint, and a pair of air pipes connected to the actuator are provided outside the enclosure. The operator can open and close the ventilation damper manually outside the enclosure. The spline shaft is used as the intermediate shaft of the universal joint, so the universal joint can expand and contract, and can follow the deformation of the enclosure, so that there is no large axial stress on the universal joint and the handle can be easily turned manually. be able to.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1A is a plan view of a manual handle, and FIG. 1B is a BB view of FIG.
It is an arrow view. Since the present invention differs from the conventional ventilation damper opening / closing device described with reference to FIGS. 2 to 5 only in the structure of the manual handle, the same members are denoted by the same reference numerals, and different portions are described. Let's focus on it.

In FIG. 1, reference numeral 10 denotes an automatic handle;
Is a universal joint. The manual handle 10 is provided through an opening 2a formed in the enclosure 2 and is supported by a bearing 10a fixedly provided outside the opening 2a. The manual handle 10 and the extension 6n on the near side of the rotary shaft 6p of the actuator 6d are connected via a universal joint 12, and when the manual handle 10 is rotated, the rotary shaft 6p of the actuator 6d rotates, The rotation shaft 6c of the central blade 6b directly connected thereto rotates. Each slat 6b
Are connected via the arms 6j and the connecting plate 6k, so that when the central blade 6b is rotated, all the blades 6b are rotated.

An intermediate shaft of the universal joint 12 is a spline shaft 13. The spline shaft 13 is shown in FIG.
As shown in (B), several slide keys are arranged at equal intervals on the outer periphery of the shaft, and are integrated with the shaft.
Spline shaft 13 and spline hole 13a covered by it
Transmit power while moving in the axial direction.

Next, the operation of the present embodiment will be described. A rotation shaft 6p of an actuator 6d for opening and closing the ventilation damper 6 is connected to a manual handle 10 provided outside the enclosure 2 via a universal joint 12, and a pair of air pipes 6s connected to the actuator 6d are connected to the outside of the enclosure 2. Is connected via a bypass pipe 6f having a bypass valve 6g provided in the case, a worker can manually open and close the ventilation damper 6 outside the enclosure 2 in an emergency. Since the intermediate shaft of the universal joint 12 is a spline shaft 13, the universal joint 12 can expand and contract, and the enclosure 2
Of the universal joint 12
The handle 10 can be easily turned manually without any large axial stress.

The present invention is not limited to the embodiments described above, and various changes can be made without departing from the gist of the invention.

[0021]

As described above, in the ventilation damper opening / closing device of the present invention, the rotation axis of the actuator for opening / closing the ventilation damper is rotated by the manual handle provided outside the enclosure, and the bypass valve is opened outside the enclosure. Therefore, the worker does not need to enter the enclosure when manually opening and closing the ventilation damper. Furthermore, since the intermediate shaft of the universal joint connected to the manual handle is a spline shaft and can expand and contract, it can follow the deformation of the enclosure, and no large axial stress is generated in the universal joint. It has excellent effects such as easy turning.

[Brief description of the drawings]

FIG. 1A is a plan view of a manual handle, and FIG.
FIG. 3 is a view taken in the direction of arrows BB in FIG.

FIG. 2 is a plan view of a manual handle.

FIG. 3 is a drawing of a gas turbine enclosure;
(A) is a side cross-sectional view, and (B) is a view on arrow BB of (A).

FIG. 4 is a drawing of a ventilation damper, (A) is a rear view,
(B) is a plan view.

FIG. 5 is a flow sheet for operating the actuator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas turbine 2 Enclosure 6 Ventilation damper 6b Blade 6c Rotating shaft of blade 6d Actuator 6f Bypass piping 6g Bypass valve 10 Manual handle 12 Universal joint 13 Spline shaft

Claims (1)

[Claims] 1. A louver-type ventilation damper operated by a pneumatic actuator, which is provided for ventilating an inside of an enclosure provided around a driving gas turbine and which opens and closes by rotating a plurality of blades. A ventilating damper opening / closing device that connects a rotating shaft of an actuator directly connected to a rotating shaft of a blade and a manual handle provided outside the enclosure via a universal joint whose intermediate shaft is a spline shaft. A pair of air pipes connected to the actuator are connected to each other via a bypass pipe having a bypass valve provided outside the enclosure.