JPS5891393A - Magnet driven pump - Google Patents

Abstract

PURPOSE:To enable to construct a pump in a compact structure, by fitting a driven magnet unit into a ring-like pump impeller, and driving the driven magnet unit by a driving magnet unit. CONSTITUTION:A ring-like impeller is obtained by opening a hole at the central part of the half product of an impeller that is not necessary to serve as a pump, and a driven magnet unit 2 is fitted into the central hole of the impeller 1 and fixed securely in place. By turning a driving magnet unit 3 connected to a motor 5 with the pump impeller 1 and the driven magnet unit 2 being coupled together in a unitary manner, magnetic turning force is transmitted to the pump impeller 1 through a partition wall 7. Thus, it is enabled to obtain an extremely compact pump having no shaft sealing parts.

Description

[Detailed Description of the Invention] Figures 1 and 2 are diagrams explaining the principle of a vortex pump.
As shown in Figures 1 and 2, impellers such as vortex pumps and vane pumps perform pumping action on their outer periphery, and the center of the impeller is the part directly necessary for pumping action other than transmitting rotational force. isn't it.

Therefore, a ring-shaped impeller is formed by hollowing out the center of the pump impeller other than that required for the pumping action, and a driven magnet 2 is fitted and fixed in the center of the impeller 1 as shown in FIG.

The integrated pump impeller l and driven magnet 2 are housed in a ring-shaped pump casing 4 as shown in FIG. 4, and a driving magnet 3 is attached to the electric motor 5 over the partition wall 7.
When the pump is rotated, the rotational force is transmitted to the pump impeller l by the magnetic force of the magnet, making it possible to create a very compact pump without a shaft seal. Since the inner periphery of the driven magnet throat 2 slides on the partition wall 7, the partition wall 7 is made of a non-magnetic and wear-resistant material.

A conventional magnet-driven pump requires a pump shaft 6 as shown in Fig. 5, and has a structure in which a pump impeller 1 and a driven magnet 2 are attached to the pump 1ll6, and the pump shaft, bearing 1 impeller key, etc. A large number of parts were required.Also, the magnet part was located outside the pump casing 4, making the pump as a whole large.As is clear from the comparison of FIGS. 4 and 5, the present invention has the following advantages:
This is a resource-saving magnetic throat drive pump with a small number of parts, which has a simpler structure than conventional products without the pump shaft, and can be manufactured very compactly.

[Brief explanation of the drawing]

1 and 2 are diagrams explaining the principle of a vortex pump. FIG. 3 is a diagram of a pump impeller according to the present invention. FIG. 4 is a longitudinal sectional view of the magnet-driven pump of the present invention. FIG. 5 is a longitudinal sectional view of a conventional magnet-driven pump. (2) is a pump impeller, 2 is a driven magnet, 3 is a driving magnet, 4 is a pump casing, 5 is an electric motor, 6 is a pump shaft, and 7 is a bulkhead. Patent applicant Nishigaki Pump Manufacturing Co., Ltd. Representative Hisashi Nishigaki - Kazuaki 1 Figure % 4 Figure 12 5

Claims (1)

[Claims] In FIG. 4, a magnet-driven pump uses a ring-shaped pump impeller 1 fitted and fixed with a driven magnet 2, and a driving magnet 3 extending over a partition wall 7.