JPH0483911A - Passage changeover device - Google Patents

Abstract

PURPOSE:To achieve smooth and reliable changeover of inside outside flow in a passage to outside inside flow by pivoting upstream and downstream end portions of a first and second bucket type structure which are provided with an inclined bottom surface and both side surfaces directing to inside/outside directions in the passage as the flow advances downstream and are open downstream and upstream, and arranging those in the direction across the passage. CONSTITUTION:A first bucket type structure 1 opened to downstream side is formed of a bottom surface 1a whose upstream end is connected to an external wall 6 of an engine with a hinge line 7, and whose passage 20 is inclined toward the downstream side to make the downstream end contact with an internal wall 5 of the engine, and of side walls 1b which stand upright at each side of the bottom surface 1a and those upper ends are parallel to the flow. A second bucket type structure is formed of an inclined bottom surface 2a whose upstream end is in contact with the internal wall 5 of the engine and is pivoted to the external wall 6 of the engine with a hinge line 8, and side walls 2, and is opened to the upstream side. The first and the second bucket type structures 1, 2 are arranged alternately, allowing smooth and reliable changeover of the inside outside flow in the passage to outside inside flow without generation of pressure losses and turbulences.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a switching device for RN of an air flow path of a jet engine, etc.

[Conventional technology]

Conventionally, there has been no channel switching device i that guides the flow inside the channel to the outside of the channel and simultaneously guides the flow outside the channel into the channel.

[Problem to be solved by the invention]

The present invention has the following features: (1) At the same time, the flow flowing inside the flow path is guided to the outside of the flow path, and the flow flowing outside the flow path is guided into the flow path.

(2) Also, the flow flowing in the channel is allowed to flow directly to the downstream side.

It is an object of the present invention to provide a flow path switching device that can take the form of the above two flow paths.

[S! [Means to solve]

The flow path switching device of the present invention includes a bottom surface that slopes toward the inside of the flow path as it goes downstream, and side walls provided on both sides of this bottom surface, and a first opening that is open toward the downstream side. The upstream end of the packet-like body is pivoted to the channel wall, and a bottom surface is provided on both sides of this bottom surface, which is inclined from inside the channel to outside the channel as it goes toward the lower R@. The downstream side Ili portion of the second packet state, which is equipped with a gasket and opened toward the upstream side, is pivoted to the channel wall, and the first and second packet-like bodies are moved in a direction across the channel. In the present invention, the fluid flowing outside the flow path enters the first packet-like body, and as it goes downstream, it slopes toward the inside of the flow path and is guided to the sole surface of the foot. Flows into the flow path. On the other hand, the fluid b flowing in the channel enters the second packet-like body, and as it goes downstream, it slopes from the inside of the channel to the outside of the channel, and is guided by the sole surface of the foot and flows out of the optical path. In this way,
The fluid in the flow path flows out of the flow path, and the fluid outside the flow path flows into the flow path, and the flow path is cut. Moreover, the fluid flowing in both buckets is guided by the bottom and side walls thereof, and there is no obstacle to the flow, reducing pressure loss and turbulence in the flow.

When the first and second packet-like bodies are moved out of the flow path by rotating them around the pivot points of the upstream Il end and the lower fi side end of each one, [Embodiment] An embodiment of the present invention, as shown in Figs. 1 to 3, allows a continuous flow of fluid from the upstream side to the downstream side in the flow path. explain.

In this embodiment, as shown in FIG. 3, a cylindrical engine inner wall 5 and a cylindrical engine outer wall 6 surrounding the first fan 10 on the upper i side and the 27th fan 11 on the downstream side are provided. The flow of the tandem fan type jet engine formed by Nt
20 switching devices.

As shown in FIG. 1, the first packet-like body 1 has an upstream end located on the engine outer wall 6, and a flow path extending from the upstream end toward the halo side. A bottom surface 1 that is inclined toward the inside of the engine 20 and whose downstream end touches the engine inner wall 5.
a, and on both sides of this bottom surface 1a, the same bottom surface 1aK stands upright Q and is parallel to the flow (so-sui-dry in Figure 1), and extends parallel to the flow. It has triangular side walls 1b, lb, and the first packet-shaped body 1 is open toward the downstream side. The upstream end of this first packet-shaped body 1 is pivoted to the engine outer wall 6 by a hinge line 7 that is perpendicular to the flow and in the plane of the engine outer wall 6.

(9) The second packet-shaped body 2 is arranged such that the upstream end of its bottom surface 2a contacts the engine inner wall 5, and the bottom surface 2a extends from inside the flow path 2o to outside the flow path as it goes downstream. The downstream end of the inclined bottom surface 2a is outside the engine! 6, the upper edge of the bottom surface 2aK is perpendicular to both 11 of the bottom surface 22, and its upper edge is parallel to the flow (y-horizontal in FIG. 1), and The second packet-shaped body 2 has triangular shapes 2b and 2b extending parallel to each other.
is open toward the upstream side, and the downstream end of the second packet-shaped body 2 is connected to the engine outer wall by the hinge line 8 in the plane of the engine outer wall 6. It is pivoted to 6.

The first and second packet-like bodies l as described above.

2 can be arranged alternately in a direction crossing the flow path 20,
Multiple pieces of each are provided. Seriously, outside the engine! 1
6 is cut out in a portion where the first and second packet-like bodies 1.2 are provided.

In this embodiment, as shown by the arrows in FIGS. ,
Bottom surface 1a and 111I walls 1b on both sides.

10 and enters the same packet-like body 1 yen and further flows through channel 2.
Introduced into 0.

On the other hand, as shown by the arrows in FIG. 1(a), (cl K), the air 513 flowing through the flow path 20FP3ftR is guided by the bottom surface 2a of the second packet-shaped body 2 and the side walls 2b, 2b on both sides, and flows into the same packet-shaped body 2. It enters the body 2 and is further sent to the outside of the flow path 2°.

In this way, in this embodiment, the airflow in the flow path 20 is
The airflow outside the flow path 2o can be guided into the flow path 20 at the primary time to switch the flow path. Moreover, the first
．． The second packet-like bodies 1 and 2 have no portions that obstruct the flow, and can suppress pressure loss and turbulence in the flow.

When the flow path is not switched, as shown in FIG. Rotate upward around the hinge line 8 at the downstream end,
Its bottom surface la and lb'i are made to coincide with the surface of the engine outer wall 6.

As a result, the airflow flowing through the flow path 20 flows toward the downstream side of the flow path 20, as shown by the arrow, with the entire nine portions of the seven packet-like bodies 1.2 being provided.

Although the above-mentioned embodiment relates to a flow path switching device for a tandem fan type jet engine, the present invention is not limited to this, and can be applied to any case where it is necessary to switch the flow path.

〔Effect of the invention〕

As explained above and as follows, in the present invention, by using the first and second packet-like bodies arranged within the scope of the claims and having the following configuration, the flow within the flow path is directed to the outside of the flow path. By guiding the flow outside the flow path into the entire flow path, the flow path switching can be carried out completely smoothly and reliably, and furthermore, the pressure loss and turbulence caused at this time can be suppressed.

However, by rotating the first and second packet-shaped bodies around the pivot point and moving them out of the Tyt passage, the flow f' in the passage is changed. It is also possible to directly flow L to the downstream side.

[Brief explanation of drawings]

Figure 1 shows one embodiment of the present invention, Figure 1 (al is a perspective view thereof, Figure 1 (b) and Figure 1 (C) are respectively
Figures (A-A celestial cross-section and B-B arrow cross-sectional view of al, Figure 2 shows the case where the packet-like body of the same embodiment is moved out of the flow path, Figure 1IJz (3) is Its perspective view, Figure 2 (
BL and (c) are respectively a C-C* cross-sectional view and a D-D arrow cross-sectional view of FIG. 1 is an explanatory diagram of the flow path. 1.--First packet-shaped body, 1a.. Bottom surface, 1b.
... Side wall, 2... Second packet-shaped body, 2a... Bottom surface 2b... Side wall, 3, 4... Airflow, 5... Engine inner wall 6... Engine outer wall, 7.8 ...Hinge line, 10...1st fan, 11...-2nd fan, 2
o...Flow path. Section 10 (a)

Claims (1)

[Claims] The upstream end of the first packet-like body, which is open toward the downstream side and has a bottom surface that slopes toward the inside of the flow path as it goes downstream, and side walls provided on both sides of this bottom surface, is defined as a flow path. A second packet-shaped second packet is pivotably supported on the wall and has a bottom surface that slopes from inside the flow path to outside the flow path as it goes downstream, and side walls provided on both sides of this bottom surface, and is open toward the downstream side. The upstream end of the body is pivotally connected to the channel wall, and the first and second
A flow path switching device characterized in that packet-like bodies are arranged side by side in a direction across the flow path.