JPH1047281A - Vertical rotary compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical rotary compressor oil feeding mechanism which is easy to be assembled and easy to be machined from viewpoint of cost reduction in a vertical rotary compressor. SOLUTION: The reference numeral 17 is a rotary shaft comprising an upper shaft 18, a shaft eccentric part 19 and a lower shaft part 20, and an upper shaft sliding surface oil groove 21, a shaft eccentric part sliding surface oil groove 22 and a lower shaft siding surface oil groove 23 are provided on the respective abaxial sliding surfaces. The upper shaft sliding surface oil groove 21, the shaft eccentric part sliding surface oil groove 22, and the lower shaft sliding surface 23 are communicated with one another. All of the upper shaft sliding surface oil groove 21, the shaft eccentric part sliding surface oil groove 22, and the lower shaft sliding surface oil groove 23 are spiral, and have a gradient to the rotary shaft 17. By this arrangement, with the rotation, the force for transferring oil along the oil grooves from bottom to top is generated to enable sure oil feeding from bottom to top.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply mechanism for a vertical rotary compressor.

[0002]

2. Description of the Related Art A conventional vertical rotary compressor is disclosed in
The one described in JP-A-195394 is known.

FIGS. 3 and 4 show the structure of a conventional vertical rotary compressor. Reference numeral 1 denotes a casing having a suction pipe and a discharge pipe 3, in which a motor 6 including a rotor 4 and a stator 5 and a compressor unit 7 driven by the motor 6 are provided.
Is fixed. Describing the compressor unit 7, a roller 10 is provided in a cylinder 8 and rotatably fitted to a part of a rotating shaft 9. Further, in a part of the cylinder 8, a vane 11 for dividing a compression space in the cylinder 8 into a suction chamber and a compression chamber is provided so as to be able to protrude and retract in the vane groove. At both ends of the cylinder 8, a main bearing 12 for supporting the rotating shaft 9 and closing an end face of the cylinder 8, and an auxiliary bearing 13 are provided. In the above mechanism, when the motor 6 is driven, the gas sucked from the suction pipe 2 according to the rolling of the roller 10 is compressed from the suction chamber through the compression chamber, and is discharged from the discharge pipe 3 to the system. In the gas compression process, the rotating shaft 9 is rotated by the driving of the motor 6, and the oil is pushed up from below by a blade 15 provided in an oil hole 14 penetrating through the center of the rotating shaft 9. Can be These oils are contained in the through oil hole 1
The oil is supplied to the outer periphery of the rotating shaft through an oil hole 16 penetrating from the shaft 4 to the outer periphery of the shaft.

[0004]

However, in this vertical rotary compressor, it is necessary to form through holes for the oil hole 14 and the oil hole 16, and the blade 15 must be formed and processed. As a result of the necessity of a step of inserting the oil into the inner oil hole 14, an increase in cost is inevitable. An object of the present invention is to provide a vertical rotary compressor oil supply mechanism including ease of assembly and ease of processing from the viewpoint of low cost.

[0005]

According to the present invention, there is provided an oil groove communicating with an outer periphery of a shaft, and all of the oil grooves for transferring oil from below to above are provided. , Which are inclined with respect to the vertical direction. As a result, extra parts can be eliminated, and complicated molding is not required.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention described in the claims of the present invention
All the oil grooves that transfer oil from the bottom to the top are provided by having oil grooves communicating with the shaft outer periphery, of which oil grooves that transfer oil from the bottom to the top are inclined with respect to the vertical direction. In the oil groove, because a force to transfer oil from bottom to top occurs,
It is possible to reliably supply oil from below to above, and there is an effect that it is not necessary to form an oil hole penetrating the center of the shaft or to provide a blade in the oil hole penetrating the center of the shaft.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof will be omitted.

(Embodiment 1) In FIG. 1 and FIG.
Reference numeral 7 denotes a rotating shaft, which includes an upper shaft 18, an eccentric portion 19, and a lower shaft 20.
The upper shaft sliding surface oil groove 21, the shaft eccentric part sliding surface oil groove 22, and the lower shaft sliding surface oil groove 23 are provided on each shaft outer sliding surface. The sliding surface oil groove 21, the shaft eccentric portion sliding surface oil groove 22, and the lower shaft sliding surface oil groove 23 communicate with each other. Then, the upper shaft sliding surface oil groove 2
1, shaft eccentric part sliding surface oil groove 22, lower shaft sliding surface oil groove 2
3 have a spiral shape and are inclined with respect to the rotation axis 17.

With this configuration, a force for transferring oil from the bottom to the top along the oil groove is generated along with the rotation of the rotary shaft, so that the oil can be reliably supplied from the bottom to the top.

[0010]

As described above, according to the present invention, oil grooves communicating with the outer periphery of the shaft are provided, and among the oil grooves, all the oil grooves for transferring oil from bottom to top are arranged in the vertical direction. The inclination makes it easy to assemble and reduce parts, processing, and cost, and provides a lubrication mechanism suitable for a vertical rotary compressor.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a vertical rotary compressor according to an embodiment of the present invention.

FIG. 2 is a side view of a rotary shaft of the rotary compressor.

FIG. 3 is a longitudinal sectional view of a conventional vertical rotary compressor.

FIG. 4 is a side view of a rotating shaft of a conventional vertical rotary compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Main bearing 13 Auxiliary bearing 17 Rotating shaft 18 Upper shaft 19 Shaft eccentric part 20 Lower shaft 21 Upper shaft sliding surface oil groove 22 Shaft eccentric part sliding surface oil groove 23 Lower shaft sliding surface oil groove

Claims (1)

[Claims] 1. An oil groove communicating with an outer periphery of a shaft, wherein all oil grooves for transferring oil from bottom to top are inclined with respect to a vertical direction. Vertical rotary compressor.