JPH0341116Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotary fluid machine made of sheet metal, that is, a pump or a fan.

[Prior Art and Its Disadvantages] Various centrifugal rotary fluid machines, ie, pumps or fans, made of conventional sheet metal are known, and are used for various purposes because of their light weight. A conventional rotary fluid machine of this type includes an impeller casing that houses an impeller and has a discharge port, and a suction casing that has a suction portion for supplying fluid to the impeller. For fluid machinery, it is better to pipe both the suction side piping and the discharge side piping in almost the same plane.
Piping construction is easy and the overall size of the fluid machine can be made compact. For this purpose, it is known that the suction pipe, usually referred to as the suction sleeve, has a suction section that extends substantially radially along the plane of the partition plate of the impeller casing.

In such conventional fluid machines, an impeller casing with a spiral portion and a suction casing with a suction sleeve are combined, but since these two casings are made separately by sheet metal processing, they are made from separate metal parts. needed a mold. Also, normally the suction side piping and the discharge side piping extend in opposite directions,
In some cases, when both tubes are arranged at a certain angle due to the layout, a separate elbow must be provided, resulting in losses.

For example, Japanese Patent Publication No. 57-45915 discloses a hydraulic machine made of iron plates, but the work is difficult because parts of different shapes and sizes must be individually manufactured and assembled.

[Problems to be Solved] Therefore, the purpose of the present invention is to be able to make a suction casing and an impeller casing with one mold, and to arrange the angular positions of the suction side piping and the discharge side piping in the layout. To provide a rotary fluid machine made of sheet metal that can be set arbitrarily.

[Means for Solving the Problems] According to the present invention, an impeller casing made of a sheet metal that houses an impeller and has a discharge port, and a suction casing made of a sheet metal having a suction part are provided, and both of the casings are In a centrifugal rotary fluid machine in which a partition plate is provided in between and a suction port is provided in the partition plate in the axial direction of the impeller, the impeller casing and suction casing made of sheet metal have the same structure. are overlaid and fixed together with the partition in between.

[Description of the function and effect of the invention] Therefore, the fluid flows from the suction part of the suction casing and flows to the impeller casing, where the pressure is increased by the impeller and is discharged from the discharge port.
Since the impeller casing and the suction casing have the same structure, they can be press-formed using one mold during sheet metal processing, improving work efficiency and providing stable performance.

Furthermore, both casings are fixed by spot welding or bolting, for example, but at that time, the angular positions of the suction part and the discharge port can be determined according to the piping on the suction side and the piping on the discharge side. etc. can be made unnecessary.

When the two casings are fastened together with bolts, holes can be drilled in the two casings at predetermined angular positions so that the angular positions can be adjusted.

[Examples] Examples of the present invention will be described below with reference to the drawings. The illustrated example shows a so-called fan with sleeves.

1 and 2, a rotary fluid machine, ie, a fan embodying the present invention, includes an impeller casing 3 having a discharge port 1 and an impeller 2 inside. The impeller 2 is adapted to be rotated by a rotating shaft 4 rotated by a motor (not shown). A partition plate 5 is provided on the opposite side of the rotation shaft 4 of the impeller casing 3, and a suction member 7 forming a suction port 6 is provided on the partition plate 5.

On the other hand, the suction casing 8 has a suction section 9 which extends radially outwards. The suction casing 8 and the impeller casing 3 are fixed to each other with a plurality of bolts 10 via the partition plate 5.
That is, the impeller casing 3 and the suction casing 8
The two are fixed facing each other, and both have the same structure.

The impeller casing 3 has a first
It consists of a part 3a and a second part 3b which is connected to the first part 3a and has a cylindrical diameter,
In addition, the suction casing 8 has a first
8a and a second cylindrical portion 8b facing the suction port 6 and having an enlarged diameter.

For example, spot welding may be used to secure the two casings, and bolts 10 as shown may also be used.

Therefore, it is sufficient to make both the suction casing and the impeller casing with one mold and combine them, and the angular positions of the suction port and the discharge port may be appropriately set when assembling both casings.

[Effects of the invention] As described above, according to the invention, two casings can be made with one mold. Further, when the two casings are fixed together, the angular positions of the discharge port and the suction portion can be determined in accordance with the layout. Therefore, assembly work efficiency is improved.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a fan embodying the present invention, and FIG. 2 is a sectional view thereof. DESCRIPTION OF SYMBOLS 1... Discharge port, 2... Impeller, 3... Impeller casing, 5... Partition plate, 8... Suction casing, 9... Suction part.

Claims (1)

[Scope of utility model registration request] It is equipped with an impeller casing made of sheet metal that houses the impeller and has a discharge port, and a suction casing made of sheet metal that has a suction part, and a partition plate is provided between the two casings, and the axis of the impeller is In a centrifugal rotary fluid machine in which a suction port is provided on a partition plate in one direction, the impeller casing and the suction casing made of sheet metal have the same structure, and are overlapped with the partition plate in between. A rotary fluid machine characterized by being integrally fixed to each other.