JPS6032394Y2 - hermetic compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hermetic compressor used in air conditioners and the like, and particularly relates to an improvement in the structure for shielding the end of a suction muffler.

Conventionally, the muffler end of a hermetic compressor is shielded by the first
It was done as shown in the figure.

That is, the sub-bearing 4 of the crankshaft 3 is attached to the gasket 5 at the end of the suction muffler 2 formed in an arc shape on the frame 1.
They are pressed into contact with each other by bolts 6 via the .

However, in such a configuration, the auxiliary bearing 4 is tightened with the bolt 6 via the packing 5.
If the thickness of the packing 5 is uneven or the bolt 6 is tightened unbalanced, the secondary bearing 4
This had the disadvantage that it was tilted and could not be stably supported.

Additionally, in the past, a shielding plate covering the end of the muffler was brought into contact with the muffler through a gasket and tightened with bolts, but in such a configuration, it was necessary to build up the frame for bolt tightening. As a result, the volume of the muffler is reduced, the noise is increased, and the cost is also increased.

The present invention eliminates the drawbacks of the conventional ones mentioned above,
without changing the support status of the crankshaft by the secondary bearing.
This was developed with the aim of providing a hermetic compressor that has a simple configuration and that reliably shields the end of the suction muffler. A pressure spring is interposed between the sub-bearing of the crankshaft bolted to the frame and the shielding plate, and the shielding plate is pressed against the end of the muffler.

The present invention will be explained below with reference to an embodiment shown in FIG.

An oil tank 11 for storing lubricating oil is formed in the lower part of a casing 10 that can be separated into upper and lower halves and can be sealed, and an electric motor 12 and a compression device 13 directly connected thereto are built in the casing 10. There is.

Further, the crankshaft 15, which is integral with the rotor 14 of the electric motor 12, operates the rotor 16 of the compression device 13, thereby pressurizing the refrigerant from the suction pipe 17.

The refrigerant from this suction pipe 17 is
A frame 19 with a main bearing 18 supporting the middle part of the frame 19
After being led into the suction muffler 20, which has a horseshoe-shaped plane, it is pressurized.

The lower end of the suction muffler 20 is open, and a horseshoe-shaped shielding plate 23 is in contact with this opening 21 via a horseshoe-shaped packing 22.

A peripheral edge 25A of a secondary bearing 25 that is fixed to the frame 19 with bolts 24 and supports the lower end of the crankshaft 15 faces below the muffler 20, and this peripheral edge 25A and the shielding plate 23 are connected to each other. A trough-like spring 26 is interposed between them, so that the shielding plate 23 comes into pressure contact with the opening 21 and completely seals the opening 21.

According to the above-described configuration, the secondary bearing 25 of the crankshaft 15 is stably fixed to the frame 19 by the bolt 24, so even if the peripheral edge 25A of the secondary bearing 25 supports the spring 26, the crankshaft 15 does not adversely affect the support condition of the

Further, the gutter-shaped spring 26 is pressed against the shielding plate 23, and the gasket 22 is pressed against the stepped portion of the opening 21 and deformed, so that the opening 21 of the muffler 20 is completely sealed.

In addition, in the embodiment described above, the shielding plate 23 and the spring 2
6 are formed separately, but it is also possible to form them integrally.

As described above, in the hermetic compressor according to the present invention, the shielding plate that closes the end of the muffler is brought into contact with the seal through the packing, and the shielding plate is held between the sub-bearing of the crankshaft bolted to the frame and the shielding plate. Since the spring is inserted and the shielding plate is pressed against the end of the muffler, the end of the suction muffler can be sealed with a simple structure without adversely affecting the support of the crankshaft by the sub-bearing. Since it does not reduce noise, it has many practical effects such as reducing noise.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing the main parts of a conventional hermetic compressor, and FIG. 2 is a longitudinal sectional view showing an embodiment of the hermetic compressor according to the present invention. 10... Casing, 12... Electric motor, 13... Compressor, 15... Crankshaft, 17... Suction machine, 18.・・・・・・
・Main bearing, 19...Frame, 20...
・Suction muffler, 21...Opening, 22・
... Patsukin, 23 ... Shielding plate, 25.
...Secondary bearing, 26...Spring.

Claims (1)

[Scope of utility model registration request] In a hermetic compressor in which a suction muffler is built into a frame, a shielding plate that closes the end of the muffler is brought into contact with a gasket, and the secondary bearing of the crankshaft bolted to the frame is provided between the shielding plate and the shielding plate. 1. A hermetic compressor, characterized in that a pressing spring is interposed and press-contacted to the end of the shielding plate and the muffler.