JPH04118258U - Frame for rotating electric machines - Google Patents

Abstract

(57) [Summary] (with amendments) [Purpose] By sharing a casting model even when manufacturing many types of casting products, the number of types of casting models can be reduced and the cost of producing casting models can be reduced. We aim to In addition, by changing the material of the fin portion of the rotating electric machine frame to a metal different from the metal for melt casting, the mechanical strength is improved and the defects of the cast product are improved. Furthermore, by changing the material of the fins to a metal with higher thermal conductivity than molten cast metal, the cooling efficiency of the rotating electric machine frame itself is improved. [Structure] The disappearing model part is made of foam beads for casting.
There is only a frame body for a rotating electric machine, and fins made of different metals as separate parts are inserted and fixed radially into the outer periphery of the disappearing model part to form a model of the frame for a rotating electric machine. [Effect] Even when changing the shape of the fins such as height, length, thickness, etc., only one type of vanishing model made of foam beads is required.
A casting model can be completed by simply changing the shape of the fins embedded in the outer periphery of the disappearing model part.

Description

[Detailed explanation of the idea]

[Purpose of invention]

0001

[Industrial application field]

This invention utilizes the lost model casting method to form a rotating body by injecting molten casting metal. Regarding frames for electrical machinery.

0002

[Conventional technology]

A conventional structure of this type of rotating electrical machine frame is shown in FIG. The frame for rotating electric machines is a cylindrical frame. A plurality of fins 2 are installed radially around the outer periphery of the main body 1. Frame body 1 and fins Since fin 2 is manufactured in one piece by casting metal for molten casting, the height, length, To change the thickness, etc., a casting model is required for the change in the shape of the fin 2. It was.

0003

[Problem that the idea aims to solve]

In order to improve the cooling efficiency in the frame for rotating electric machines, the height and length of the fins 2, If you change the thickness etc., you will need a casting model for the change in the shape of the fin 2. , the number of types of casting models increases. For this reason, the time and effort involved in producing a casting model increases and There was a problem of an increase in storage space and management of later casting models. In addition, the cooling effect To improve the efficiency, increase the height of fin 2 and reduce the spacing between the fins. It is effective to make the frame body 1 and the fins 2 one piece by casting molten casting metal. In the case of manufacturing, there were manufacturing limitations in the above two items. In addition, the frame of the rotating electric machine Fin 2 is a cast product with a thin cross section, so it is brittle and may be damaged by external forces such as impacts. There was also a problem.

0004 This invention was developed in view of the above circumstances, and is suitable for manufacturing various types of cast products. By sharing the casting model in both cases, the number of types of casting models can be reduced and the casting model can be shared. The purpose is to reduce the labor involved in model production and to reduce the storage space and management of casting models.

[0005] In addition, the material of the fin 2 part of the rotating electric machine frame is made of a metal different from the metal for melt casting. By changing the quality of the product, we improve the mechanical strength and strengthen the defects of the cast product. The purpose is to provide. Furthermore, the material of the fin 2 part is made from a metal for molten casting. By changing to a metal material with high thermal conductivity, the cooling efficiency of the rotating electrical machine frame itself can be improved. The purpose is to raise [Structure of the idea]

[0006]

[Means to solve the problem]

Rotation formed by injecting molten casting metal into a disappearing model made of foam beads In the frame for electrical machinery, the vanishing model made of the foamed beads is coated with dissimilar metals in advance. After fixing a part of the fin, the above-mentioned melt is applied to the disappearing model part made of foam beads. A portion of the dissimilar metal fin is cast into the casting by injecting melt casting metal. It is characterized by being buried all over the place.

[0007]

[Effect]

The disappearing model part made of foam beads for casting is a part of the frame body of a rotating electric machine frame. The fin made of different metals is a separate part of the vanishing model made of foamed beads. It is inserted and fixed in a radial manner to the outer periphery of the part, and is used as a model of a frame for a rotating electric machine. The vanishing model made of foam beads remains the same even when the height, length, thickness, etc. of the fins change. Changes in the shape of fins in which part of the part is embedded within the casting, In other words, the casting model can be completed by simply changing the shape of the fins buried in the outer periphery of the lost model. and cast frames for rotating electric machines.

[0008]

【Example】

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. Figure 1 is a book This is a frame for a rotating electric machine according to an embodiment of the invention. Frame body 1 has 3 legs (3 legs depending on the model) It has a cylindrical shape (without), and multiple L-shaped fins 4 are installed radially around its outer circumference. It is. The frame body 1 and legs 3 are made of cast iron, but the L-shaped fins 4 are made of steel. A part of the L-shaped fin 4 is embedded in the frame body 1 by being cast inside.

[0009] To manufacture the rotating electrical machine frame shown in Fig. 1, first the parts of the frame main body 1 as shown in Fig. 2 are prepared. A disappearing model 5a in the shape of a minute, and an extinguisher for preventing the L-shaped fin 4 from coming off as shown in FIG. The lost model 5b is manufactured (the same number of lost models 5b as the L-shaped fins 4 are manufactured). or , a plurality of L-shaped fins 4 made of steel as shown in FIG. 4 are manufactured. And this L In order to fix the letter-shaped fins 4 to the outer periphery of the disappearing model 5a, as shown in FIGS. 5 and 6, The groove 6 for embedding the L-shaped fin 4 is radially L-shaped on the outer periphery of the disappearing model 5a. Provide the number of fins equal to the number of fins 4.

0010 Next, as shown in FIG. 6, insert the L-shaped fin 4 into the groove 6 of the disappearing model 5a, and Furthermore, a disappearing model 5b is embedded and installed on top of it to prevent the L-shaped fin 4 from coming off. Shape. Then, the paint mold is coated on this vanishing model, and then the paint is coated. A vanishing model with L-shaped fins 4 attached is installed inside the flask, and the flask is vibrated. Fill in the sand while adding. At this time, in the parts of the L-shaped fin 4, the disappearance model For parts that are not buried inside the mold and are exposed outside, they can be buried inside the sand by filling with sand. It is fixed in place and does not move significantly during subsequent injection of metal for molten casting. Suna included After the casting is completed, the L-shaped fins 4 are formed in the cast product by injecting molten casting metal. This is a product that is cast and buried.

[0011] In order to improve the cooling efficiency, we manufactured the L-shaped fin 4 with a changed shape. In order to do this, the shape (length, width, etc.) of the groove 6 provided on the outer periphery of the disappearing model 5a is L-shaped. A groove 6 is provided to match the shape of the buried model of the fin 4. And L-shaped Insert the fin 4 into this groove 6 and place it above it to prevent the L-shaped fin 4 from coming off. embedding the disappearing model 5b, molding it, and coating the paint mold. As a result, a disappearing model in which a part of the L-shaped fin 4 is buried is completed. This disappearing model By injecting molten casting metal into can be made.

0012 As mentioned above, the frame for rotating electric machines uses the frame body as a disappearing model, and the fin part as a model. The fin is a part of the steel product as it is, and a part of this fin is made to simulate the disappearance of the frame body. By embedding it in a mold and injecting molten casting metal into the disappearing model, it is completed. The mechanical strength of the fins of manufactured products with sharp edges increases, making them less susceptible to shocks during product transportation and assembly. This has the effect of eliminating the problem of fin damage caused by shots.

[0013] In addition, in order to improve cooling efficiency, the metal material of the fins is made of the metal used for fusion casting of the frame body. Use fins with higher thermal conductivity than fins, or change the height, length, thickness, etc. of the fins. This can be done easily and effectively using a vanishing model of the same frame body.

[0014]

[Effect of the idea]

As explained above, according to the present invention, the rotating electric machine frame is attached to the vanishing model in advance. After embedding and fixing a part of the fin of a dissimilar metal part, melt casting gold is placed in this disappearing model part. casting a portion of the fin of said dissimilar metal part into the casting by injecting metal; Since the product is buried in the ground, the mechanical strength of the fins is increased, making it easier to transport and assemble the product. It is possible to eliminate the problem of fin damage due to impact or external force during standing.

[0015] In addition, in order to improve cooling efficiency, the metal material of the fins is made of the metal used for fusion casting of the frame body. Do not use fins with higher thermal conductivity than fins, or change the height, length, thickness, etc. of the fins. This can be done easily and effectively using a vanishing model of the same frame body.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a frame for a rotating electric machine with L-shaped fins, which is an embodiment of the present invention.

FIG. 2 is a perspective view of a rotating electric machine frame with grooves on its surface.

FIG. 3 is a perspective view of a disappearing model of the frame body and a disappearing model for preventing L-shaped fins from coming off.

FIG. 4 is a perspective view of the L-shaped fin of the present invention.

FIG. 5 is an enlarged sectional view of a groove provided in the disappearing model of the frame body.

FIG. 6 is an enlarged sectional view when the L-shaped fin is inserted into the groove of the disappearing model of the frame body and the disappearing model is buried to prevent it from coming off.

FIG. 7 is a perspective view of a conventional rotating electric machine frame.

[Explanation of symbols]

1... Frame body, 2... Fin, 3...
Legs, 4...L-shaped fin, 5a...disappearance model of frame body, 5b...disappearance model for preventing L-shaped fin from coming off, 6...groove.

Claims (1)

[Scope of utility model registration request] Claim 1: In a frame for a rotating electric machine formed by injecting molten casting metal into a vanishing model part, a part of a fin of a dissimilar metal component is fixed to the vanishing model in advance, and then a part of the fin of a dissimilar metal component is fixed to the vanishing model part, and then 1. A frame for a rotating electrical machine, characterized in that a part of the fin of the dissimilar metal component is embedded in a cast product by injecting molten casting metal.