JPS6258092A - Rotary compressor - Google Patents

Abstract

PURPOSE:To facilitate manufacture of a rotary compressor by cantilering the crank shaft for driving a roller while forming the side housing at the side not supporting a eccentric shaft with an annealed punching steel plate. CONSTITUTION:A crank shaft 55 for driving the roller 9 of a rotary compressor is cantilered by a right housing 11. A side housing at the side not supporting the crank shaft 55 is formed with an annealed punching steel plate. The side housing or the side housing a board 56 can flex slightly through differential pressure thus to maintain a proper clearance between the roller 9 and a vane, thereby adjusting of the clearance or highly accurate machining is not required resulting in facilitation of manufacture of the rotary compressor.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a rotary compressor used in refrigerators, air conditioners, etc.

BACKGROUND OF THE INVENTION In recent years, rotary compressors have become established in the industry. Conventionally, cylinders with relatively large cylinder volumes were used for air conditioners, but recently they have also been used for medium and small refrigerators, and applications with cylinder volumes of /JS have also begun.

An example of the prior art will be described below with reference to the drawings. A typical rotary compressor is explained based on Fig. 2.
is a closed shell, and inside this shell are the electric element 2 and
Rotary compression elements 3 are respectively arranged. The electric element 2 includes a stator 4 attached to the inner wall of the sealed shell 1 and a rotor 6 inserted through a crankshaft 5 provided inside the stator.
It is composed of. The rotary compression element 3 includes a cylinder shaft, a row 29 that rolls inside the cylinder 7 by an eccentric shaft 8 of the crankshaft 5, and a bay 710 that contacts this roller and divides the inside of the cylinder 7 into a high pressure chamber and a low pressure chamber. , a right side housing 11 that closes the opening of the cylinder bow, and a left side housing 12. The crankshaft 6 is pivotally supported within the right side housing 11, and the shaft end 5a of the crankshaft 5 is pivotally supported within the left side housing 12.

In other words, it has a double-sided bearing configuration.

The operation will be explained below.

When the electric element 2 is energized, the crankshaft 5 integrated with the rotor 6 rotates, the roller 9 rolls along the inner wall of the cylinder 7, the gas in the compression chamber is compressed, and the closed shell 1 The inside of the sealed shell is filled with high-pressure gas. Then, it is discharged to the outside via a discharge pipe (not shown). On the other hand, low-pressure gas is led directly into the compression chamber from outside the closed shell.

Problems to be Solved by the Invention As mentioned above, rotary compressors are beginning to be used in a wide range of applications, from those with large cylinder volumes to those with small cylinder volumes.

For cylinders with large volumes, a large load is applied to the bearings, so a conventional dual-support configuration is required. However, when the cylinder capacity is small, the load applied to the bearing is also small, so the conventional dual-support configuration is not necessary and the specifications are wasteful.

In view of the above problems, the present invention provides an inexpensive rotary compressor with simplified parts.

Means for Solving the Problems In order to solve the above problems, the rotary compressor of the present invention has the following features:
One side of the side housing is made of a stamped steel plate material such as tempered spring steel, which brings both ends of the cylinder into airtight contact.

According to the above-described structure, the present invention replaces the conventional double-supported bearing with a cantilever bearing and uses a stamped steel plate material such as tempered spring steel for the side housing on the side that is not supported. Can be simplified.

EXAMPLE A rotary compressor according to an example of the present invention will be described below with reference to the drawings. The same parts as in FIG. 2 of the prior art described above are indicated by the same numbers, and detailed explanation thereof will be omitted.

Reference numeral 55 denotes a crankshaft, and its straight portion 55a is a flat plate on the right side, and the material is a stamped steel plate such as a tempered spring steel called flapper valve steel with a plate thickness of 0.2 to Q and about 5jI11. 57 is a discharge valve that discharges refrigerant from the compression chamber 68.

59 is a muffler cover that covers the discharge valve 57.

Next, the operation of the rotary compressor configured as above will be explained.

When the motorized element 2 is energized, the compression chamber 68 is opened as described above.
The gas is compressed and passed from the discharge valve 67 to the muffler cover 69.
The gas is guided inside, the sound is muffled, and then introduced into the space of the closed shell 1, and the inside of the closed shell is filled with high pressure gas. The filled gas pushes the wall surface of the cytono-1 housing plate 56 and tries to bend it inward into the cylinder. On the other hand, gas compression force also acts inside the cylinder. Accordingly, the site nozzle plate 66 changes slightly in response to the pressure difference between the two, and the clearance between the roller 9 and vane 10 and the site nozzle is maintained appropriately. The side housing plate 66 of the present invention, which is constructed from a single plate, provides a rotary compressor having the same volumetric efficiency as the side housing of a bearing material in which a conventional high-precision machining and a selected combination of clearances have been implemented.

Effects of the Invention As described above, the present invention uses a stamped steel plate material such as tempered spring steel for one side of the side housing, which is hermetically sealed to both ends of the cylinder, thereby eliminating the need for conventional high-precision machining and It has a volumetric efficiency equivalent to that of the conventional rotary compressor, which has a selective combination of clear 1 and 7 times.

In other words, the side housing plate of the present invention can be made by simply punching out a steel plate (the conventional high-precision machining and selection and combination of clearance in the cylinder height direction are not required), the parts are greatly simplified, and the material and man-hours are reduced. can be saved, making it cheaper.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a rotary compressor showing an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional rotary compressor. 7...Cylinder, 8...Eccentric shaft, 9...
...Roller, 11 ... Right side housing, 65 ... Crankshaft, 66 ... Side housing. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure

Claims (1)

[Claims] an eccentric shaft, a cylinder that forms a compression chamber concentrically with the center of rotation of the eccentric shaft, a roller that is attached to the eccentric shaft and rolls along the inner wall of the cylinder as the eccentric shaft rotates, and this roller. A punched steel plate that is tempered on the side that does not support the eccentric shaft of the side housing that contacts the outer circumference of the cylinder and partitions the compression chamber into a high-pressure chamber and a low-pressure chamber, and that connects both ends of the cylinder in an airtight manner. A rotary compressor made of wood.