JP3059575B2 - Sheet metal inline pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet metal in-line pump.
It relates to flop relates especially full-circumferential-flow-type sheet-metal-line pump of inlet and discharge ports are arranged on the same line.

[0002]

2. Description of the Related Art An in-line pump in which a suction port and a discharge port are arranged on the same line has been conventionally known. In such an in-line pump, a casting side casing made of casting, a discharge side casing also made of casting, and an outer body (or outer cylinder) connecting these suction side and discharging side casings.
This forms a pump casing. Then, an impeller and a hydro portion including guide vanes and volutes are accommodated in the suction side casing. Further, a bearing and the like for supporting the main shaft are housed in the discharge side casing.

[0003]

However, in the above-described in-line pump, the suction side casing is
The shape and size of the impeller, guide vanes, and volutes were restricted because they contained a hydro section. On the other hand, since the bearing on the discharge side casing is also mounted, there are restrictions on the shape and dimensions similarly to the suction side casing. For this reason, the suction side casing and the discharge side casing cannot be made to have the same shape and the same size, and are formed individually by casting or the like. Therefore, when manufacturing the suction-side casing and the discharge-side casing, productivity is low, and this has been a factor of increasing the manufacturing cost.

The present invention has been made in view of the above circumstances, and an object of the present invention is to form the suction side casing and the discharge side casing into the same shape and the same size so that the suction side casing and the discharge side casing are formed. it is to provide an in-line pump which can be commonly used and.

[0005]

In order to achieve the above-mentioned object, the present invention provides a suction side casing, a discharge side casing, and an outer cylinder connecting the suction side casing and the discharge side casing. In a sheet metal inline pump in which a discharge port is arranged on the same line, an inner casing accommodating an impeller is provided therein, and the suction side casing and the discharge side casing have the same size and shape .
The casing is supported by a non-rotating portion on the driving machine side .

[0006]

According to the present invention having the above-described structure, the suction-side casing is provided with the impeller, the guide vane, the volute and the like because the inner casing in which the impeller is accommodated is provided inside the suction-side casing. And the shape and dimensional restrictions due to the impeller and the hydro portion are eliminated. Therefore, the shape and dimensions of the suction side casing can be matched to the shapes and dimensions of the discharge side casing, and the casing can be shared.

[0007]

EXAMPLES In the following, the sheet metal in-line pump according to the present invention
Will be described with reference to FIG. FIG. 1 is a cross-sectional view showing an all circumferential flow type inline pump of the present invention. The in-line pump shown in the present embodiment includes a suction side casing 1, a discharge side casing 5, and an outer cylinder 9 connecting the suction side casing 1 and the discharge side casing 5. The suction-side casing 1 and the outer cylinder 9 are connected by flanges 20 and 20, and the discharge-side casing 5 and the outer cylinder 9 are connected by flanges 21 and 21, respectively. The suction side casing 1, the discharge side casing 5 and the outer cylinder 9 constitute a casing.
Are arranged.

The suction-side casing 1 has a main body 2 on a truncated cone, a suction nozzle 3 on a cylinder extending from the main body 2 to the suction side, and an opening on the opposite side of the suction nozzle 3. And a provided flange 4. Similarly to the suction-side casing 1, the discharge-side casing 5 has a truncated-cone-shaped main body 6, a cylindrical discharge nozzle 7 extending from the main body 6 to the discharge side, and a discharge-nozzle. And a flange 8 provided on the opening side opposite to the opening 7. The discharge side casing 5 and the suction side casing 1 are formed in exactly the same size and the same shape.

On the other hand, an inner casing 10 is provided inside the suction side casing 1, and this inner casing 10
Is composed of a container-shaped main body 11 and a cylindrical suction side 12 extending from the main body 11 to the suction side. A guide device 13 forming a guide vane or a volute is provided inside the main body 11 of the inner casing 10.
Is installed. The guide device 13 has a spigot fitting portion.
3 is fitted. Outer body 2 of this canned motor 22
3 has high rigidity, and a guide device 1
As a result, the inner casing 10 is supported by the outer shell 23 of the can motor 22 having high rigidity. One end of the suction side portion 12 of the inner casing 10 extends to the vicinity of the suction nozzle 3. And
A seal member 14 is interposed in a gap between the end of the suction side portion 12 of the inner casing 10 and the suction nozzle 3 of the suction side casing 1, and the suction member (low pressure side) and the discharge side ( High pressure side) is sealed.

An impeller 15 is housed inside the inner casing 10, and the impeller 15 is
Is fixed and supported on the main shaft 16 of the main body. A turning prevention plate 18 is fixed inside the suction side portion 12 of the inner casing 10. A liner ring 19 is disposed adjacent to the main body 11 and the suction side 12 of the inner casing 10, and the liner ring 19 and the edge 1 of the impeller 15 are provided.
A slight clearance is formed between the gap 5a.

The suction nozzle 3 and the discharge nozzle 7 are respectively connected to a suction flange 31 via an intermediate ring 30.
And the discharge flange 32 are fixed respectively. That is, the intermediate ring 30 is made of stainless steel or the like made of the same material as the casing body, and has the opening 30a and the recess 30b.
And a male screw portion 30c, and a front end surface thereof forms a sealing surface 30s with a mating flange (not shown). The small-diameter portion 3b (or 7b) of the suction nozzle 3 (or the discharge nozzle 7) is joined to the opening 30a of the intermediate ring 30 by welding, and the concave portion 30b of the intermediate ring 30 forms a spigot fitting portion. The large-diameter portion 3a (or 7a) of the suction nozzle 3 (or the discharge nozzle 7) is fitted to 30b and is joined by welding. On the other hand, the suction flange 31 and the discharge flange 32 are made of a material different from that of the casing body, for example, cast iron (FC) or the like, and have internal thread portions 31a and 32a at their inner ends, respectively. , 32a are screwed and fixed to the intermediate ring 30.

A stator 24 and a rotor 25 are provided in an outer body 23 of the canned motor 22. The rotor 25 is supported by the main shaft 16, and a cylindrical can 26 is fitted inside the stator 24. The main shaft 16 is rotatably supported at both ends by radial bearings 27 and 28, and has a thrust force supported by two thrust disks 34 and 35 at one end. That is, all radial and thrust bearings are mounted on the motor, not on the casing.

The operation of the in-line pump will be briefly described. The fluid sucked from the suction nozzle 3 is guided into the impeller 15 through the suction side 12 of the inner casing 10. After the fluid discharged from the rotating impeller 15 changes its flow direction from the radial direction to the axial direction via the guide device 13, the fluid formed between the outer cylinder 9 and the outer shell 23 of the canned motor 22 is formed. It flows into the passage 36 and flows into the discharge side casing 5 through the passage 36. Thereafter, the fluid is discharged from a discharge nozzle 7 formed integrally with the discharge side casing 5.

In this embodiment, the suction side casing 1
Inside, an inner casing 10 accommodating therein an impeller 15 and a guide device 13 composed of guide vanes and volutes.
Since the suction side casing 1 is provided, the suction side casing 1 is not affected by the hydro portion including the guide vanes and the volutes, and the shape and size restrictions due to the hydro portion are eliminated.
Thereby, the shape and dimensions of the suction side casing 1 can be matched with those of the discharge side casing 5, and the casing can be shared.

[0015]

As described above, according to the present invention, since the inner casing accommodating the impeller is provided in the suction-side casing, the suction-side casing is positioned on the left and right sides of the hydro section comprising the guide vanes and volutes. And the restrictions on the shape and dimensions due to the hydro portion are eliminated. Therefore, the shape and dimensions of the suction side casing can be matched to those of the discharge side casing, and the casing can be shared. Further, according to the present invention, since the inner casing accommodating the impeller is provided in the suction side casing, the inner casing is not affected by the external force of the pipe, and the casing shape can be simplified.

[Brief description of the drawings]

Is a sectional view showing an embodiment of a sheet metal-line pump according to the invention; FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Suction side casing 3 Suction nozzle 5 Discharge side casing 7 Discharge nozzle 9 Outer cylinder 10 Inner casing 13 Guide device 14 Seal member 15 Impeller 16 Main shaft 22 Canned motor 23 Outer body 24 Stator 25 Rotor 26 Can 30 Intermediate ring 31 Suction flange 32 Discharge flange

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-130599 (JP, A) JP-A-3-47499 (JP, A) JP-A-61-129496 (JP, A) 47102 (JP, U) J. 55-26551 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F04D 29/42 F04D 13/06

Claims (2)

(57) [Claims] 1. A sheet-metal inline pump comprising a suction side casing, a discharge side casing, and an outer cylinder connecting the suction side casing and the discharge side casing, wherein the suction port and the discharge port are arranged on the same line. the casing is provided inside the internally to accommodate the impeller, the said suction side casing and the discharge-side casing and the same size and shape, said Ke
The in- line pump made of sheet metal is characterized in that the sourcing is supported by the non-rotating part on the driving machine side . 2. A line pump according to claim 1, wherein the guide device comprising a guide vane or volute etc. is disposed within the casing.