JPH02267390A - Rotary compressor - Google Patents

Abstract

PURPOSE:To eliminate leakage of refrigerant gas and deformation of an auxiliary bearing by fixing an oil feeding cover, the one end of which is open into an oil and in which an oil feeding spring is stored, through a gasket to the shaft-supporting auxiliary bearing on the end surface opposite the the electric drive element side. CONSTITUTION:An oil is reserved and an electric drive element and compressive element are stored in a closed container 1. A shaft 9 with an eccentric portion 10, an oil feeding spring 14 screwed into the shaft 9 at the end opposite to the electric drive element side, an oil feeding cover 15 the one end of which is open into the oil 4 an in which the oil feeding spring 14 is stored, and an auxiliary bearing 50 bearing the shaft 9 at a position opposite to the electric drive element side are at least provided for the compressive element. In this case, the oil feeding cover 15 is fixed through a gasket 52 to the auxiliary bearing 50 on the end surface opposite to the electric drive element. Thus, leakage of the refrigerant gas discharged into a discharge muffler chamber 54 to the oil feeding cover 15 can be eliminated and deformation of the auxiliary bearing 50 due to press-fitting can also be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rotary compressor used in refrigeration equipment such as refrigerator-freezers.

Prior Art Below, a conventional rotary compressor will be explained with reference to the drawings. 3, FIG. 3, and FIG.
This is a horizontal rotary compressor shown in No. 13095, in which 1 is a substantially cylindrical closed container long in the transverse direction, and is driven by an electric element M consisting of a stator 2 and a rotor 3, and this electric element M. A compression device C is housed therein. 4 is oil, which is collected at the bottom of the sealed container 1. 5
is a cylinder, 6 is a main bearing, and 7 is a sub-bearing, both ends of which are hermetically closed to form a compression chamber 8.

9 is a shaft connected to the rotor 3 and has an eccentric portion 10; 11 is a roller fitted in the eccentric portion 1Q and inscribed in the compression chamber 8; A vane 12 is pressed by a spring 13 and comes into contact with the roller 11 to partition the compression chamber 8 into high and low pressure chambers.

Reference numeral 16 denotes a discharge pulp provided on the sub-bearing 7. 1
Reference numeral 7 denotes a partition plate interposed between the secondary bearing 7 and the cup-shaped discharge cover 17, and the partition plate 17 forms the cup-shaped portion of the discharge cover 17 as a discharge chamber 17a. A curved oil supply cover 15 is fixed to the center of the discharge cover 17, is integrated with the discharge cover 17, and is lightly press-fitted into the convex portion 7a of the sub-bearing 7.

One end of the oil supply cover 16 is opened into the oil/I/4, and the oil supply spring 14 fixed to the shaft 9 is disposed inside.

In the above configuration, the rotation of the rotor 3 is transmitted to the shaft 9, and the oil supply spring 14 fixed to the shaft 9 is regulated by the oil supply cover 15 fixed to the secondary bearing 7 and the discharge cover 17, so that it has a curved shape. Rotate while holding it. Oil 4 is sequentially supplied to the shaft 9 through the leads of the coil springs 14. The refrigerant compressed in the compression chamber 8 is discharged from the discharge valve 16 provided in the sub-bearing 7 into the discharge chamber 17a through a small hole (not shown) provided in the partition plate 18, and is then discharged from the discharge cover 17 into the closed container 1. released within.

Problems to be Solved by the Invention However, in the above configuration, the discharge cover 17
If the joint between the convex portion 7a of the sub-bearing and the convex portion 7a of the sub-bearing is poor, the discharged gas in the discharge chamber 17a will leak into the oil supply cover 16, and the oil/L/L/L sent by the coil spring 14 will leak.
If the oil 4 is blown back, the oil supply to the shaft 9 will be insufficient. For this reason, airtightness is maintained by press-fitting the discharge cover 17 into the convex shaped portion 7a of the site housing 7. However, press-fitting the discharge cover 17 causes deformation such as shrinkage of the inner diameter portion of the sub-bearing or warping of the end surface, resulting in a problem of reduced reliability.

In view of the above problems, the present invention provides a highly reliable rotary compressor in which the sub bearing is not deformed.

Means for Solving the Problems In order to solve the above problems, the rotary compressor of the present invention has the following features:
a main bearing, a plate that seals the other end face of the cylinder and has a discharge valve and a valve seat on the opposite side of the cylinder; a sub-bearing for supporting the sub-bearing; and a refueling cover having one end opened into the oil and accommodating the oil supply spring, and the refueling cover being fixed to the end surface of the non-electric element of the sub-bearing with a gasket interposed therebetween. be.

Operation According to the present invention, with the above structure, the discharge cover and the oil supply cover can be fixed without being press-fitted into the sub-bearing, thereby eliminating deformation of the sub-bearing. Furthermore, since the sub-bearing and the oil supply cover are not in communication with each other, the discharged gas does not leak into the oil supply cover, and the amount of oil supply does not become insufficient. A gasket is interposed when fixing the sub-bearing to the oil supply cover to prevent oil from leaking therefrom.

Embodiments Hereinafter, embodiments 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 described using the same reference numerals, and parts that are the same in structure and operation will be omitted.

In FIG. 1, 51 is a plate that seals the end surface of the cylinder 6 on the side opposite to the electric element 2. 16 is the plate 51
The discharge valve 53 attached to is a valve seat on the plate 51. Reference numeral 5o denotes an auxiliary bearing that is disposed so as to cover the discharge valve 16 and pivotally supports the side of the shaft 9 opposite to the electric element 2. 52 is a gasket interposed between the sub-bearing 50 and the oil supply cover 15, and 66 is a sub-bearing discharge hole bored in the sub-bearing 60. 54 is the plate 51
and a discharge muffler chamber formed by the sub-bearing 50.

In the above (four configurations), the compression chamber 8 is the cylinder 6
It is formed by the main bearing 6 and the plate 61. Then, the gas compressed in the compression chamber 8 is transferred to the plate 51.
The oil passes through the gap between the valve seat 53 and the discharge valve 16, and then passes through the discharge muffler chamber 54 and the sub-bearing discharge hole 65 without leaking into the oil supply cover 15, and is released into the closed container 1. Further, the load of the shaft 9 is received by the main bearing 6 and the sub-bearing 50.

Further, the oil (V4) raised by the rotation of the oil supply spring 14 passes through the oil 14 groove of the shaft 9, lubricates each sliding part, and is released into the closed container 1 again. Since the secondary bearing 50 and the oil supply cover 15 are bolted together with the gasket 52 in between, the secondary bearing 5o will not be deformed and the oil 4 will not leak therefrom.

Therefore, a stable oil supply mechanism can be obtained, and the secondary bearing will not be deformed by 5 degrees.

Effects of the Invention As described above, the present invention seals a main bearing and the other end face of the cylinder, and a plate having a discharge valve and a valve seat is disposed on the opposite side of the cylinder so as to cover the discharge valve. an auxiliary bearing that is provided to pivotally support the non-electromotive element side of the shaft; and an oil supply cover that has one end opened into the oil and houses the oil supply spring, and the oil supply cover is connected to the non-electromotive element side of the auxiliary bearing. By interposing and fixing the end face with a gasket, the refrigerant gas discharged into the discharge muffler chamber does not leak into the oil supply cover, and the sub-bearing does not deform, so a highly reliable compressor can be obtained.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a rotary compressor showing an embodiment of the present invention, Fig. 2 is an enlarged view of main parts of Fig. 1, Fig. 3 is a sectional view of a conventional rotary compressor, and Fig. 4 is a sectional view of a conventional rotary compressor. This is an enlarged view of the main part of Figure 3. 1...Airtight container, 2...Electric element, 4
...Oil, 5...Cylinder, 6...
...Main bearing, 8...Compression chamber, 9...
・Shaft, 1o... Eccentric part, 11...
・"o-7,12...Bane, 14...
・Oil supply spring, 16...Oil supply cover, 16
...Discharge valve, 50... Sub-bearing, 51.
...Plate, 52 ...Gasket, 6
3... Valve seat. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (1)

[Claims] Oil is stored in an airtight container and includes an electric element and a compression element. a cylinder to be formed; a roller fitted to an eccentric portion of the shaft and rolling along an inner wall of the cylinder; a vane in contact with an outer periphery of the roller to partition the compression chamber into a high pressure chamber and a low pressure chamber; a main bearing that seals an end face of the cylinder and pivotally supports the electric element side of the shaft; a plate that seals the other end face of the cylinder and has a discharge valve and a valve seat on a surface opposite to the cylinder; an auxiliary bearing disposed to cover the shaft and pivotally supporting the non-electric element side of the shaft; and an oil supply cover having one end opened into the oil and housing the oil supply spring;
A rotary compressor in which the oil supply cover is fixed to the end face of the non-electric element of the sub-bearing with a gasket interposed therebetween.