Lubrication – Systems – Rotary compressor
Reexamination Certificate
2001-04-18
2003-03-04
Fenstermacher, David (Department: 3682)
Lubrication
Systems
Rotary compressor
C415S088000
Reexamination Certificate
active
06527086
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an oil supply device for a closed reciprocating compressor, and more particularly to an oil supply device for a closed reciprocating compressor to minimize a movement of an oil scum and increase pumping amount during an oil supply by improving a structure of an end portion of the oil supply device installed at an end portion of a rotary axle, thereby minimizing a friction noise.
2. Description of the Background Art
A closed reciprocating compressor generally functions to discharge a coolant to outside in a refrigerating cycle of consecutively performing a compression, condensation, expansion and vaporization by means of the coolant.
As shown in
FIG. 3
, such a closed reciprocating compressor generally comprises a driving section
20
for generating a power inside of a closed container
10
and a compressing section
30
for compressing a sucked coolant by the power from the driving section
20
.
The driving section
20
mounted on an upper part of the closed container
10
includes a stator
21
, a rotor
22
, and a rotary axle
23
coupled with the rotor
22
to incorporate an eccentric shaft
24
.
The compressing section
30
mounted on a lower part of the closed container
10
comprises a cylinder
31
and a cylinder head
32
having a compression compartment for compressing a coolant, a piston
33
for reciprocating inside of the cylinder
31
, and a connecting rod
34
for connecting the piston
33
to the eccentric shaft
24
.
Oil is stored at a lower part of the closed container
10
and pumped to each sliding section by an oil supply device
40
installed on one side of the eccentric shaft
24
for lubrication and refrigeration.
As shown in
FIG. 4
, the oil supply device
40
is of a tubular shape slantingly mounted toward a central axis of the rotary axle
23
at an end portion of the eccentric shaft
24
.
The closed reciprocating compressor in general as described above generates a magnetic field between the stator
21
and the rotor
22
to rotate the rotary axle
23
. The piston
33
connected to the connecting rod
34
on the eccentric shaft
24
of the rotary axis
23
sucks the coolant to compress and discharge by reciprocating inside of the cylinder
31
. That is, the coolant is repeatedly sucked, compressed and discharged by a continuous reciprocation of the piston
33
.
Also, when a centrifugal force (Equation 1) is added to the oil supply device
40
which is fixed to the eccentric section of the connecting rod
34
driven by the rotation axle
23
, refrigerated oil collected at the lower part is supplied to the friction movement area of each device section by an elevating component of a force (Equation 2) generated at that time.
F=F
c
·sin &thgr;(
F
c
=Centrifugal force) Equation 1
F
c
=M·r
·&ohgr;
2
(
M
=Mass of rotary body,
r
=rotating radius) Equation 2
However, the oil supply device
40
is slantingly mounted toward the central axis of the rotary axle
23
at the end portion of the eccentric shaft
24
in the closed reciprocating compressor, and is rotated at a high speed by stirring an oil scum when rotating the rotary axle. At this time, the oil supply device
40
periodically stirs the oil scum and generates noise by the irregular movement of the oil scum, which causes increases of the compressor noise and refrigerator noise.
SUMMARY OF THE INVENTION
To resolve the above problems, it is an object of the present invention to improve the structure of an end portion of an oil supply device
40
and generate a magnetic field between a stator
21
and a rotor
22
that rotates a rotary axle
23
by being applied a power. Also, when a centrifugal force is added to the oil supply device
40
which is fixed to a eccentric section of the connecting rod
34
by following the rotation of the rotary axle
23
, a refrigerated oil collected in the lower part is supplied to the area of friction movement of each device section by an elevating component of a force (Equation 2) generated at that time.
It is another object of the present invention to minimize the stirring times for refrigerated oil O of the oil supply device
40
, and also friction noise and oil noise in a device section of the compressor by increasing oil pumping power.
The structure of the present invention to achieve the above objects includes a closed container
10
for storing oil in the lower part, a driving section
20
mounted in the closed container
10
for generating a motive power and a compressing section
30
for sucking, compressing and discharging the coolant by receiving the motive power of the driving section
20
.
The oil supply device for the closed reciprocating compressor includes the rotary axle
23
having an eccentric shaft
24
mounted on the driving section
20
for rotating, and supplies oil to the driving section
20
mounted on the lower end of the eccentric shaft
24
and the compressing section
30
, wherein the device is characterized in becoming the smaller in diameter from the upper part to the lower part.
REFERENCES:
patent: 3858685 (1975-01-01), Bono
patent: 5088579 (1992-02-01), Kim et al.
patent: 5377781 (1995-01-01), Yun
patent: 6000500 (1999-12-01), Oh
patent: 2001/0050200 (2001-12-01), Oh
Burns Doane , Swecker, Mathis LLP
Fenstermacher David
Samsung Kwangju Electronics Co., Ltd.
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