JPH0261385A - Vertical type rotary compressor - Google Patents

Abstract

PURPOSE:To obtain the vertical rotary compressor which can be easily manufactured and free from troubles at a low cost by omitting the oil feeding blades by allowing a subbearing oil groove and a main shaft oil feeding groove to communicate through a communication groove formed on the outer peripheral surface of an eccentric part. CONSTITUTION:The lower edge 50a of an oil groove for supplying oil onto a subshaft is opened into oil 5, and the upper edge 51a of an oil groove for feeding oil onto a main shaft is opened into a space 16 in a sealed container, and the upper edge 50b of the oil groove and the lower edge 51b of the oil groove communicate each other through a communication groove 54 formed on the outer peripheral surface of an eccentric part 7. Thus, the rotation of a rotor 3 is transmitted to a shaft 6, and the oil 5 is sucked from the lower edge 50a of the oil groove, accompanied with the revolution and lubricates the part between the shaft 6 and a side housing 10 and passes through a communication grove 54 through the upper edge 50b of the oil groove, and further sucked from the lower edge 51b of the oil groove and discharged into the space 16 in the sealed container from the upper edge 51a of the oil groove. Therefore, the need of housing the oil feeding blades in the conventional is obviated, and the vertical type rotary compressor free from troubles can be obtained at a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vertical rotary compressor, particularly to an oil supply system.

BACKGROUND OF THE INVENTION In recent years, rotary compressors in the refrigeration and air conditioning industry have become extremely popular and are replacing reciprocating compressors.

An example of a conventional vertical rotary compressor will be described below with reference to the drawings. FIG. 2 shows a cross section of a conventional vertical rotary compressor. 1 is a closed container in which a motor 4 consisting of a stator 2 and a rotor 3, and a compression device 15 driven by this motor 4 are housed. ing. 5
The oil is collected at the bottom of the sealed container 1. 16 is a space inside the closed container. 6 is a shaft having an eccentric portion 7.

8 is a cylinder 7 that forms a compression chamber 9 concentrically with the center of rotation of the shaft 60, and 10.11 is a main side housing and a sub side housing that airtightly close both sides of the cylinder 8. A roller 12 is attached to the eccentric portion 7 and rolls along the inner wall of the compression chamber. A vane 13 is in contact with the roller 12 and partitions the compression chamber 9 into a high pressure chamber and a low pressure chamber. 2o is a suction pipe, one end of which is press-fitted into the cylinder 8 and opens into the low pressure chamber of the compression chamber 9, and the other end is connected to the low pressure side of the system (not shown) outside the closed container 1. 21 is a discharge pulp provided in the main side housing 10;
A discharge muffler 22 has an opening 23 and is fitted into the main side housing 1o. Reference numeral 24 denotes a discharge pipe, one end of which opens into the closed container interior space 16, and the other end connected to the high pressure side of the system (not shown). 3o is the shaft 6
The oil supply hole is perforated in the axial direction and houses the oil supply vane 31. Reference numeral 32 denotes an oil supply system formed on the outer peripheral surface of the shirt 10, which communicates with the oil supply hole 3o via a communication hole 33, and one end 32' is open to the internal space 16 of the closed container.

In the above configuration, the rotation of the rotor 3 is transmitted to the shaft 6, the roller 12 fitted in the eccentric part 7 rolls in the compression chamber 9, and the bay 713 that is pressed against the roller 12 causes the inside of the compression chamber 9 to be rotated. By partitioning the gas into a high pressure chamber and a low pressure chamber, the gas sucked through the suction pipe 20 is continuously compressed. The compressed gas is discharged from the discharge pulp 21 into the discharge muffler 22 and then released into the closed container internal space 16 through the opening 23 and discharged from the discharge pipe 24.

Next, as the shaft 6 rotates, the oil supply vane 31 housed in the oil supply hole 3° sucks the oil 5.

The sucked oil passes through the communication hole 33, the oil supply system 32, and is discharged into the closed container interior space 16 from the upper end 32'.

Problems to be Solved by the Invention However, in the above configuration, the oil supply hole 3o is provided in the shaft 6, and the oil supply blade 31 is press-fitted and fixed therein. Not only is the machining accuracy of the inner diameter strictly required, which increases the cost, but if the outer diameter of the oil supply vane 31 is too large, it may not be possible to press-fit it, and if it is forcefully press-fitted, the secondary shaft portion of the shaft 6 will be distorted, and the outer diameter roundness will be affected. Deteriorate. On the contrary, if the outer diameter of the oil supply vane 31 is small, there is a problem that the oil supply vane 31 comes off during operation.

The present invention overcomes the above-mentioned problems and provides a vertical rotary compressor that eliminates oil supply vanes, is less likely to break down, is easy to produce, and is inexpensive.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a substantially spiral-shaped subshaft oiling groove with one end opening into oil on the outer circumferential surface of the subshaft portion of the shaft. A main shaft oiling groove having a substantially spiral shape with one end opening into the internal space of the sealed container is provided on the outer peripheral surface, and the sub-shaft oiling groove and the main shaft oiling groove are communicated through a communication groove provided on the outer peripheral surface of the eccentric part. It is something that

Function: With the above-described configuration, the present invention uses a substantially spiral-shaped subshaft lubrication system provided in the main subshaft portion, instead of press-fitting a separate lubrication blade into the lubrication hole as in the conventional example. Since oil is supplied by the pump action of the groove and the main shaft oil supply groove, the oil supply vane can be omitted, thus improving productivity and reducing costs. Furthermore, the refueling vane does not come off during operation.

EXAMPLE Hereinafter, a vertical rotary compressor according to an example of the present invention will be described with reference to the drawings. Note that parts that are the same as those in the conventional example will be explained using the same reference numerals and configurations.

Items with the same operations will be omitted.

In FIG. 1, reference numeral 6o denotes a substantially spiral-shaped countershaft oil supply groove provided on the outer peripheral surface of the countershaft portion 63 of the shaft 6, and the lower end 50a of the countershaft oil supply groove opens into the oil 6.

Reference numeral 61 denotes a substantially spiral-shaped main shaft oil supply groove provided on the outer periphery of the main shaft portion 52 of the shaft 6, and the upper end 51a of the main shaft oil supply groove opens into the internal space 16 of the closed container. And the upper end of the countershaft oil supply groove so
b and the lower end 51b of the spindle oil supply groove communicate with each other through a communication groove 54 provided on the outer peripheral surface of the eccentric portion 7.

In the above configuration, the rotation of the rotor 3 is transmitted to the shaft 6, and as the shaft 6 rotates, the oil 6 is sucked from the lower end 50a of the subshaft oil supply groove, lubricating the space between the shaft 6 and the side housing 10. Countershaft oil groove upper end sob
, the communication groove 54 , and further the main shaft oil supply groove lower end 6 .
1b and is discharged from the upper end 51a of the spindle oil supply groove into the airtight container internal space 16.

Therefore, unlike the conventional example, there is no need to house the oil supply vanes, so that a vertical rotary compressor that is low in cost and has few failures can be obtained.

Effects of the Invention As described above, the present invention provides a substantially spiral-shaped subshaft oiling groove with one end opening into oil on the outer peripheral surface of the subshaft portion of the shaft,
Approximately threaded on the outer peripheral surface of the main shaft with one end opening into the space inside the sealed container.
By providing a linear main shaft oiling groove and communicating the subshaft oiling groove and the main shaft oiling groove through a communication groove provided on the outer circumferential surface of the eccentric part, oil is circulated between the subshaft oiling groove and the main shaft oiling groove. Since this oil can sufficiently lubricate the sliding parts of the shaft and side housing, it is possible to obtain a vertical rotary compressor with fewer breakdowns and at low cost.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a vertical rotary compressor according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional rotary compressor. 1...Airtight container, 6...Oil, 6.
...Shaft, 7...Eccentric part, 8...
...Cylinder, 9...Compression chamber, 1o...
...Side housing, 12...Roller, 13
・Old: Vane, 16 ・Old: 1m pressure element, 1e: Group: Space inside the sealed container, 60: Subshaft oil supply groove, 51
...Main shaft oil supply groove, 62...Main shaft part, 6
3... Subshaft portion, 54... Communication groove.

Claims (1)

[Claims] a shaft that stores oil in a sealed container and has an eccentric part and a main shaft part and a sub-shaft part connected to both sides of the eccentric part; a cylinder that forms a compression chamber concentrically with the center of rotation of the shaft; a side housing that airtightly closes both sides of the cylinder and pivotally supports the shaft; a roller that is attached to the eccentric portion and rolls along the inner wall of the cylinder as the shaft rotates; a compression element having a vane that is in contact with the outer periphery and partitions the compression chamber into a high pressure chamber and a low pressure chamber, and has a generally spiral-shaped subshaft with one end opening into oil on the outer peripheral surface of the subshaft portion of the shaft; providing a lubrication groove, a substantially spiral-shaped main shaft lubrication groove with one end opening into the internal space of the closed container on the outer circumferential surface of the main shaft portion;
A vertical rotary compressor, wherein the subshaft oil supply groove and the main shaft oil supply groove are communicated with each other through a communication groove provided on an outer peripheral surface of the eccentric portion.