JPH0423117B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotor for a rotary fluid pump and a method for manufacturing the same.

Rotary fluid pumps are widely used in many industrial fields, but because of their relatively large weight, there has been a desire to reduce their weight. Particularly in transportation, there has been a strong desire to reduce the weight of rotary fluid pumps as an energy-saving measure.

In order to reduce the weight of a rotary fluid pump, it is important to reduce the weight of the rotor, which occupies most of its internal volume, and the applicant previously provided a hollow rotor in Japanese Patent Application No. 58-28611. The present invention provides an invention that solves this problem.

In view of this point, it is an object of the present invention to provide a lightweight rotor that is solid but whose interior is made of lightweight material and has high rigidity, and a method for manufacturing the same.

A first invention to achieve this object is characterized by a rotor having a metal rotor outer periphery, a pipe penetrated through the center of the rotor, and a synthetic resin core filled inside the rotor. A pipe that becomes a shaft member is passed through the center of the outer periphery of a metal rotor with vane grooves formed by press molding.
A rotary type in which the pipe is expanded by applying hydraulic pressure inside the pipe during bulge molding, then fixed to the outer circumference of the rotor and welded together, and then synthetic resin is filled and solidified inside the rotor to form the core material. The present invention is characterized by a method of manufacturing a rotor for a fluid pump.

The present invention will be explained below based on illustrated embodiments.

As shown in FIG. 1, a rotor 1 for a rotary fluid pump has a rotor outer peripheral portion 3 made of a non-ferrous metal such as aluminum, an aluminum alloy, a magnesium alloy, or a ferrous material, in which a plurality of vane grooves 2 are formed.
The rotor is a solid rotor having a pipe-shaped shaft 4 that penetrates and is firmly attached to the center of the rotor outer circumferential portion 3, and a synthetic resin core material 5 that is filled and solidified inside the rotor.

The shaft 4 is formed with bearing support parts 4a, 4b, a mechanical seal fitting part 4c, and a pulley mounting part 4d.

Next, an embodiment of the method for manufacturing the rotor 1 will be explained with reference to FIGS. 2 to 4. First, as shown in FIG. As shown in the figure, a rotor outer periphery 3 with a plurality of vane grooves 2 formed thereon is formed, a pipe material is passed through the center 12 of the rotor outer periphery 3, and hydraulic pressure is applied inside the pipe by bulge forming. The outer diameter of the pipe material is fixed to the bottom of the vane groove 2 by expanding the part of the pipe material that fits into the center part 12 as shown in FIG. Support part 4
A, 4b, a mechanical seal fitting part 4c, and a pulley mounting part 4d are formed on the shaft 4.
Then, a synthetic resin is filled and solidified into the interior 3a of the rotor outer circumferential portion 3 to produce a rotor 1 having a solid core material 5 as shown in FIG.

FIGS. 5 to 7 show other embodiments of the rotor manufacturing method of the present invention. First, as shown in FIG. 2 is rolled up to form a cylindrical shape as shown in FIG. 6, and the joints 14 are welded and fixed to form the rotor outer peripheral portion 3. Then, as in the previous embodiment, a pipe material is passed through the center part 12 of the rotor outer peripheral part 3, and a shaft 4 is formed by bulge forming as shown in FIG. A synthetic resin is filled and solidified to obtain a rotor as shown in FIG.

As described above, in the present invention, the inside of the rotor is filled with synthetic resin, so it is lighter in weight than a rotor made only of metal materials, and the shaft is also pipe-shaped, and the rotor is also made pseudo-hollow, which increases rigidity. It is an excellent invention that improves performance and is easy to manufacture.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of a rotor for a rotary fluid pump according to the present invention, and FIGS. 2 to 4 show an embodiment of the rotor manufacturing method of the present invention. 3 is a perspective view of the outer periphery of the rotor, FIG. 4 is a perspective view of the shaft fixed to the outer periphery of the rotor, and FIGS. 5 to 7 show other embodiments of the method of the present invention. 5 is a perspective view showing a state in which vane grooves are formed in a flat plate material, FIG. 6 is a perspective view showing a state in which the flat plate material of FIG. FIG. 7 is a perspective view of the shaft fixed to the outer circumference of the rotor. 1 is a rotary fluid pump rotor, 2 is a vane groove, 3 is a rotor outer periphery, 4 is a shaft, 5 is a core material, 11 is a cylindrical body, 12 is a central portion, 13 is a flat plate material, and 14 is a joint.

Claims (1)

[Claims] 1. A rotor for a rotary fluid pump, which has a metal rotor outer periphery, a pipe-shaped shaft penetrated through the rotor center, and a synthetic resin core filled inside the rotor. 2 A pipe that becomes the shaft member is passed through the center of the outer periphery of a metal rotor with vane grooves formed by press forming, and hydraulic pressure is applied inside the pipe by bulge forming to expand the rotor. 1. A method of manufacturing a rotor for a rotary fluid pump, which comprises fixing and welding the rotor to the outer periphery, and then filling and solidifying a synthetic resin inside the rotor to form a core material. 3. The method for manufacturing a rotor for a rotary fluid pump according to claim 2, wherein the outer circumferential portion of the metal rotor is formed by press-molding a metal cylindrical body to form vane grooves. 4. The rotor according to claim 2, wherein the outer peripheral part of the metal rotor is formed by press-molding a metal flat plate material to form a vane groove, and then rolling it into a cylindrical shape, and welding the joints. A method for manufacturing a rotor for a type fluid pump.