JPS59155592A - Rotor for rotary hydraulic pump - Google Patents

Abstract

PURPOSE:To lighten the weight of the rotor and permit mass production of the rotor by a method wherein the rotor is constituted of a hollow rotor main body, both side plates welded at both sides of the rotor and a rotary shaft fixed to one of both side plates. CONSTITUTION:Both side plates 13, 14 are welded to both sides of the rotor main body 12 formed into hollow and the rotary shaft 11 is fixed to one of the side pates 13, 14 to form the rotor 10. According to this method, the weight of the rotor is light since the rotor main body 12 is hollow while the manufacturing and assembly, by means of welding, of the rotor main body 12, the rotary shaft 11 and the side plates 13, 14 are simple, therefore, the rotor 10 may be manufactured by means of mass production under low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in rotors for rotary fluid pumps.

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 amount of pumps used as a measure to save energy. The main reason for the increase in weight of a pump is the heavy solid rotor, so in order to reduce the weight of the pump, the rotor must be changed from a heavy solid body to a light hollow body.

However, for this purpose, the hollow rotor must be able to be manufactured efficiently. Further, since it is preferable that the rotor of a non-lubricated vane type rotary compressor, in which the temperature rises significantly, has a built-in cooling heat pipe, it is necessary to have a built-in heat pipe that does not require much effort.

An object of the present invention is to provide a hollow body that can meet the above requirements.

In order to achieve the above object, the rotor of the present invention includes a rotor body formed in a hollow shape, both side plates welded to both sides of the rotor body, and a rotating shaft fixed to at least one of the both side plates. If you want to incorporate a heat pipe, drill a blind taper hole in the rotating shaft that tapers toward the booby side, and insert a hydraulic fluid sealing plug at the entrance of the tapered hole in the rotating shaft or at the center of the axis of the side plate on the opposite side from the pulley side. The hydraulic fluid is sealed inside the rotating shaft or inside the rotating shaft and the rotor body.

The rotor of the present invention will be explained based on embodiments shown in the drawings. As shown in FIGS. 1 and 2, a rotor body 12 of a rotor 10 is formed hollow by extrusion, press molding, or the like, and side plates 13 are formed on both sides of the rotor body by press molding or manufacturing. 14 are joined by welding, preferably resistance welding. Although the side plate 14 and the rotating shaft 11 are integral, welding the rotating shaft 1dll to the press-formed side plate 14 is easier to manufacture and cheaper than forming them integrally from the beginning. Since the rotor 10 is hollow, it is lightweight, and the rotor body 12, rotating shaft 11, and side plates 13, 14 are easy to manufacture and assemble by welding, so the rotor 10 can be mass-produced at low cost.

As shown in FIG. 3, before welding the rotating shaft 11 to the side plate 14, a blind taper hole 2 is bored on the pulley side, and a female thread 3 is cut at the entrance of the taper hole. A heat pipe working fluid is injected into the inside of the tapered hole 2, and a sealing plug 5 is screwed into the female inlet thread 3 through the sealing member 4 to seal the working fluid inside. As a result, the rotating shaft 11 acts as a heat pipe, with the portion connected to the side plate 14 serving as a heat receiving portion, and the shaft end portion on the pulley side serving as a heat radiating portion. The heat is transferred from the side plate 14 of the rotor body to the heat receiving section of the heat pipe, and the working fluid in the heat receiving section is evaporated. The evaporated working fluid passes through the axis of the tapered hole 2 and is liquefied at the heat dissipation section at the end of the shaft. Since the liquefied working fluid moves along the inner circumferential wall of the tapered hole 2 to the heat receiving section again, heat exchange through the heat pipe is rapid, and the heat of the rotor 1o is efficiently released to the outside. Therefore, rotor 1
0 temperature will not rise above the permissible limit.

As shown in Figure 4, the working fluid of the heat pipe is rotated 1I.
By enclosing not only the inside of il+11 but also the inside of the rotor body 12, the rotor body 12 becomes the heat receiving part of the heat pipe, so that the rotor 1° can be cooled more efficiently. In this case, the rotating shaft 11 is provided with the same tapered hole 2 as in the embodiment shown in FIG. 3, but the internal thread 3 for the inlet of the hydraulic fluid is provided at the shaft end of the side plate 13 opposite to the pulley side. A sealing plug 5 is screwed into the female inlet thread 3 through a sealing member 4, and a working fluid is sealed inside. If the rotor is cantilevered, side plate 1
3 does not have a shaft end, so the narrow part of the side plate is recessed inward to form the inlet for the hydraulic fluid, but instead of sealing the inlet for the hydraulic fluid with a sealing plug, it is also possible to seal the inlet by welding. good.

As mentioned above, the rotor of the present invention is lightweight and easy to mass produce, and if necessary, a heat pipe can be incorporated very easily.

[Brief explanation of drawings]

1 and 2 are an exploded perspective view and a partially stored perspective view of a rotor according to an embodiment of the present invention, FIG. 3 is a diagram corresponding to FIG. 2 of an embodiment incorporating a heat pipe, and FIG. 4 is a diagram corresponding to FIG. FIG. 3 is a diagram corresponding to FIG. 3 of another embodiment. 2 Tapered hole, 5: Encapsulation plug, 10: Rotor, 11: Rotating shaft, 12 Two rotors, 13. 14 + side plate Applicant Nippon Piston Ring Co., Ltd. Procedural Amendment July 16, 1981 Commissioner of the Patent Office Kazuo Wakasugi 1. Indication of the case 1981 Special No. 028611 2. Name of the invention Rotor for rotary fluid pump 3. Person making the amendment Relationship to the case Patent applicant name 1. Yomoto Piston Ring Co., Ltd. 4. Agent address 5th Floor, Kosato Kaikan, 1-18-14 Nishi-Shinbashi, Minato-ku, Tokyo 105 Kan (03) 501-2287 6. Number of inventions increased by amendment None 7. Detailed explanation of the invention in the specification subject to amendment Column 8, Contents of the Amendment Contents of the Amendment (1) From page 3, line 18 to page 4, line 3 of the specification, “No. 1”
11911 as shown in FIG. Join by resistance welding. ” to the following sentence. As shown in Figures 1 and 2, the rotor body 12 of the rotor 10 is formed hollow by extrusion processing, press forming, etc. Hollow rotor body 12 made of iron-based material such as
side plates 13.1 formed by press forming or forging from ferrous material such as steel on both sides of the rotor body.
4 are joined by welding, hot joining, preferably resistance welding. ”

Claims (1)

[Claims] 1) A rotary fluid pump comprising a hollow rotor body, side plates welded to both sides of the rotor body, and a rotating shaft provided on at least one of the side plates. Rotor. 2) The rotor for a rotary fluid pump according to claim 1, wherein the rotating shaft is formed integrally with the side plate. 3) The rotor for a rotary fluid pump according to claim 1, wherein the rotating shaft is welded to the side plate. 4) A hollow rotor body, both side plates welded to both sides of the rotor body, a rotating shaft provided in at least one of the both side plates, and a tapered blind hole drilled in the rotating shaft. A rotor for a rotary fluid pump consisting of a heat pipe working fluid sealed inside. 5) The rotary fluid pump according to claim 4, characterized in that a sealing plug is attached to the entrance of the blind tapered hole via a sealing member, and the heat pipe working fluid is sealed inside the rotating shaft. Rotor. 6) Claims characterized in that an inlet is formed in the shaft portion of the side plate opposite to the rotating shaft, and a sealing plug is attached to the inlet to seal the heat pipe working fluid inside the rotating shaft and the rotor body. The rotor for a rotary fluid pump according to item 4.