JPS5872692A - Pump - Google Patents

Abstract

PURPOSE:To have a pump with small size and light in weight as well as facilitate its manufacture by forming an impeller in a single piece with the rotor using resin material containing a bearing substance such as carbon and arranging bearing parts for this at its ending parts. CONSTITUTION:The internal circumference of a stator 1 is enclosed by a case 2, in which a bearing part 4 is formed at one end 3 of the case 2 and a casing 6 is mounted on the other end 5. The casing 6 is equipped with a bearing 7, an intake hole 8 and a discharge hole 9. The rotor 11 is provided with an axially oriented hollow part 15 around its axis, where the hollow part 15 is furnished with bearing parts 13, 14 at its ending parts. A molded member 16 in which the rotor 11, impeller 12 and bearing parts 13, 14 etc. are formed consists of a resin substance containing graphite etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pump structure that is easy to manufacture and has good operating characteristics.

Pumps used for circulating hot water or discharging small amounts of water are generally small and lightweight, but they have had the problem of low efficiency, such as high power consumption despite their small output.

The reason for this poor efficiency is that small electric motors have a large winding resistance, which increases copper loss and deteriorates efficiency, and also increases the proportion of friction loss in the shaft sealing device and bearings.

For example, in a pump of about 10 to 15 watts, if a general induction motor is used, the power consumption is 50 to 80 watts, which is inefficient and continuous operation increases the burden of electricity charges.

Such problems can be solved by using a highly efficient motor such as a transistor motor to reduce the loss caused by the motor, and by integrating the rotor and vane I to eliminate the loss associated with the pump part such as a single-shaft sealing device, which eliminates the need for a shaft sealing device. It can be improved by creating a new structure.

However, with regard to bearings, if the rotor is made of a submersible type in order to eliminate the need for a shaft sealing device, underwater metal will be used, which tends to increase friction loss and requires consideration to improve wear resistance.

Furthermore, if the underwater metal is provided independently on the rotor, the alignment and the number of machining operations will increase, so the rotor has the drawback that it becomes expensive even if it is constructed to be small and lightweight.

In view of these circumstances, an object of the present invention is to provide a pump that is small, lightweight, easy to manufacture, and has good operating characteristics with high efficiency.

Hereinafter, the present invention will be explained based on an embodiment shown in the drawings. The figure is a longitudinal sectional view of a pump showing an embodiment of the present invention.

In the pump shown in FIG.
A bearing 4 is formed at one end, and a casing 6 is attached to the other end 5.

The casing 6 is provided with a bearing 72, a water intake port 8, and a discharge port 9.

Further, the rotor tt formed by the permanent magnet IO located at the magnetic core of the stator l and the blade 12 are integrally formed, and shaft supports 13 and 14 supported by the bearings 4 and 7 are formed.

Further, an axial hollow part 15 is formed in the axial center of the rotor 11, and shaft supports 13, 14 are provided at both ends of the hollow part 15.
is formed.

Rotor 11. The molded body 16 that integrally forms the blade 12h, the shaft supports 13, 14, etc. is made of a material (polyacetal) containing graphite or the like in resin f)? ), it is easy to mold and can be used as a bearing material.

The arrows in the figure indicate water flow, and the amount of water is relatively small.

Further, the shaft supports 13, 14 are supported by the bearings 4, 7 with a looseness that allows them to rotate, and are configured to provide water lubrication since the rotor 11 is submerged.

The shaft supports 13 and 14 have a relationship of 2 with the bearings 4 and 7.
It suffices if it is configured to have a concave and convex shape in the axial direction, and is supported in the axial direction and in the axial direction.

In such a configuration, in the pump, when the stator l is excited, the rotor tt formed by the permanent magnet 10 rotates, and the pump action of the vanes 12 and the pump draws water from the water intake port 8 and sends water from the discharge port 9. be able to.

The pump can be operated with high efficiency by using a transistor motor using a permanent magnet 10, and by submerging the rotor 11 using the case 3, a shaft sealing device is unnecessary and unnecessary load is reduced. It can be eliminated.

Furthermore, since the molded body 16 of the shaft support 13.14 is made of resin containing graphite, which is convenient as a bearing material, the sliding characteristics with respect to the bearing 4.7 are improved.

Moreover, since the case 3 is provided and the rotor 11 is submerged, the shaft supports 13 and 14 are lubricated with water, and smooth shaft support characteristics can be obtained.

Therefore, unnecessary loads are reduced and operational efficiency is improved.

In addition, since the molded body 16 contains graphite, the contained graphite may be exposed and deposited on the sliding surface during operation, forming the shaft supports 13 and 14' with excellent wear resistance. Become.

When the rotor 11 is formed with a hollow part 1st in the axial center part, a minute water flow is generated due to the royal force difference between water suction and discharge as shown by the arrow in the figure, which improves water lubrication and improves internal cooling. This is advantageous because water containing impurities does not accumulate on the shaft supports 13 and 14.

Since the hollow portion 15 and the shaft supports 13, 14 are formed in the axial direction, they can be easily molded with the mold body 16, and can also be easily removed from the mold.

Furthermore, if the shaft supports 13 and 14 are formed with axial unevenness along with the bearings 4 and 7, any shape can be formed without being limited to this embodiment.

For example, the same effect can be obtained by forming a protrusion that fits into the hollow portion 15 of the bearings 4 and 7t of the case 3 and the rotor 11.

As explained above, according to the present invention, in a pump in which the inner periphery of the stator is made stiff and the blades are integrally formed on the rotor, the molded body that integrally forms the blades and the rotor is made entirely of bearing material such as carbon. The bearing performance can be improved because it is made of resin, which improves operating efficiency and durability.Furthermore, by forming a hollow part in the rotor shaft center, cooling and lll sliding effects are promoted, making it extremely effective. You can get a more efficient pump.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view of a pump showing an embodiment of the present invention. 2...Case, ll...Rotor,
12... Impeller, 13.14...
Axial support, 15...Hollow part, 16...
...Mold body. Patent applicant Shibaura Seisakusho Co., Ltd. +2 / +41b101116

Claims (2)

[Claims] (1) In a pump in which the inner periphery of the stator is shielded and blades are integrally formed with the rotor, the blades are formed integrally with the rotor using resin containing a bearing material such as carbon, and shaft supports T- A pump characterized by shadow formation. (2) A patent characterized in that the rotor shaft center portion t4+ is formed in the air and shaft portions are formed at both ends of the hollow portion.