JPS61101690U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a partially longitudinal side view showing the construction of a magnetic pump as an embodiment of the present invention, and FIG. 2 is a partially longitudinal side view of a conventionally known representative magnetic pump of this type. 01a, 1a...front casing, 01b, 1b
... Rear casing, 01c, 1c... Rear support part,
01d, 1d...Front liquid chamber, 01e, 1e...Rear liquid chamber, 01f, 1f...Gap, 02, 2...Case cover, 02a, 2a...Liquid hole, 03a, 3a...
Front radial bearing, 03b, 3b...Rear radial bearing, 03c, 03d, 3c, 3d...Gap, 04
, 4... Impeller, 04a, 4a... Impeller rotating shaft, 04b, 4b... Longitudinal hole, 04c, 4c... Outlet,
04d, 4d...liquid chamber, 05a, 5a...driving magnet, 05b, 5b...driven magneto, 06,
6...Pump coupling, 06a, 6a...Gap,
07a, 7a...front thrust bearing, 07b, 7b
... Rear thrust bearing, 08a... Gap, 8a... Liquid injection groove, 08b, 8b... Gap, 09, 9... Balance hole.

Amendment November 30, 1980 The scope of claims for utility model registration is amended as follows.

[Scope of claims for utility model registration] (1) Front casing 1a and rear casing 1b
and the front radial bearing 3a attached to the case cover 2 interposed between the front radial bearing 3a and the rear casing 1.
A driving magnet 5a for rotating the rotating shaft 4a of the supported impeller 4 via a rear radial bearing 3b attached to the rear end support portion 1c of b.
and the driven magnets 5b are mounted on the rotating shaft 4 located outside the outer peripheral surface of the rear casing 1b and inside the rear casing 1b so as to face each other in close proximity to each other. The front end of the vertical through hole 4b bored at the center of the rotating shaft 4a is connected to the front radial bearing 3.
The gap (including the liquid groove) 3c between the inner circumferential surface of the rotary shaft 4a and the outer circumferential surface of the rotary shaft 4a is opened near the front end, and a part of the pump discharged liquid introduced into the front liquid chamber 1d is pump coupled. A liquid injection groove 8a provided on the rear end surface of the front radial bearing 3a that comes into contact with the front end surface of the front thrust bearing 7a attached to the rotating shaft 4a on the front end surface side of 6; Gap on the inner peripheral surface side of the radial bearing 3a (including liquid groove)
3c, the liquid chamber 4d, the first path passing through the balance hole 9, the gap 6a outside the outer peripheral surface of the pump coupling 6, and the rear liquid chamber 1e, and then the rotating shaft 4a.
While returning to the front casing 1a after being divided into two circulation systems: the central longitudinal hole 4b, the liquid chamber 4d, and the second path passing through the balance hole 9,
Magnetic pump, characterized in that it is adapted to lubricate and cool the front radial and thrust bearings 3a, 7a and the rear radial and (if any) thrust bearings 3b, 7b, respectively. (2) The vertical hole 4b drilled at the center of the impeller rotating shaft 4a is opened at an appropriate intermediate position between the front edge of the front radial bearing 3a and slightly forward and rearward positions. A magnetic pump according to claim 1 of the utility model registration, characterized in that:

Claims (1)

[Scope of claims for utility model registration] (1) Front casing 1a and rear casing 1b
The rotation of the impeller 4 is supported via a front radial bearing 3a attached to the casing cover 2 interposed between and a rear radial bearing 3b attached to the rear end support portion 1c of the rear casing 1b. a shaft 4a; in order to rotate this rotating shaft 4a, on the outer circumferential surface of the rear casing 1b and on the rotating shaft 4a inside the rear casing;
The driving magnet 5a and the driven magnet 5b are respectively mounted so that they can face each other in close proximity to each other; A part of the pump discharge liquid introduced into the front liquid chamber 1d formed in the rear casing 1b due to the rotation of the impeller 4 is returned to the front casing 1a through the rear radial bearing 3b and the like. Therefore, there is a gap 6a provided between the outer circumferential surface of the pump coupling 6 and the inner circumferential surface of the rear casing 1b, a rear liquid chamber 1e connected to the gap 6a, a front end surface of the rear radial bearing 3b, and the pump coupling. A gap 8b between the rear end surface of the thrust bearing 7b provided on the rear end surface side (if any) of the rear radial bearing 3b, and a gap 3d between the inner peripheral surface of the rear radial bearing 3b and the outer peripheral surface of the rotating shaft 4a (including the liquid groove). , a gap 1f formed between the rear end surface of the rotating shaft 4a and the inner surface of the rear end of the rear casing 1b, and a longitudinal passage bored in the center of the rotating shaft 4a so that the rear end is connected to the gap 1f. In a magnetic pump that is equipped with lubrication and cooling means for each bearing including the hole 4b, the front end of the vertical through hole 4b at the center of the rotating shaft is connected to the inner circumferential surface of the front radial bearing 3a and the outer circumferential surface of the rotating shaft 4a. A part of the pump discharge liquid introduced into the front liquid chamber 1d is opened near the front end of the gap (including the liquid groove) 3c between the pump coupling ring 6 and the rotating shaft 4a. a liquid injection groove 8a provided on the rear end surface of the front radial bearing 3a that comes into contact with the front end surface of the attached front thrust bearing 7a;
Continuing to this, the gap (including the liquid groove) on the inner peripheral surface side of the front radial bearing 3c, the liquid chamber 4d, and the balance hole 9
a first path passing through the pump coupling 6;
After passing through the gap 6a outside the outer peripheral surface and the rear liquid chamber 1e,
The front radial and Thrust bearing 3
A magnetic pump, characterized in that it is adapted to lubricate and cool the rear radial and thrust bearings 3b, 7b, respectively. (2) The vertical hole 4b bored at the center of the impeller rotating shaft 4a is designed to sandwich the front edge of the front radial bearing 3a and open at a position slightly forward and rearward of the front edge of the front radial bearing 3a. A magnetic pump according to claim 1 of the utility model registration claim, characterized in that: