JP2512034B2 - Horizontal rotary compressor - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor used in a refrigerating device such as a refrigerator / freezer.

2. Description of the Related Art Conventionally, for example, Japanese Patent Publication No. 61-4799 is used for refueling a horizontal rotary compressor that is mounted so that a crankshaft is positioned horizontally.
As shown in 4, a refueling system was adopted in which a coil spring integrated with the crankshaft was arranged in a curved refueling pipe.

Hereinafter, an example of the above-described conventional horizontal rotary compressor will be described with reference to the drawings.

FIG. 3 shows a conventional horizontal rotary compressor. In FIG. 3, 1 is a closed case, 2 is a stator of an electric element, and 3 is a rotor. Reference numeral 4 denotes a crankshaft, to which the rotor 3 is press-fitted and fixed. A roller 5 is rotatably arranged on the circumference of the core 6 of the crankshaft 4. Reference numeral 7 is a cylinder, 8 is a side housing on the side of the rotor 3, which is fixed to the closed case 1 by welding, and 9 is a side housing on the side opposite to the rotor, which integrally has a bearing 10. Reference numeral 11 denotes a curved oil supply pipe, in which a coil spring 12 having a winding outer diameter close to the inner diameter of the oil supply pipe 11 is integrated with the crankshaft 4. 13 is a lubricating oil, which is enclosed in the closed case 1.

Regarding the horizontal rotary compressor configured as described above,
Particularly, the refueling operation will be described.

During operation of the horizontal rotary compressor, the rotor 3 rotates, and the crankshaft 4 press-fitted and fixed to the rotor 3 rotates. When the crankshaft 4 rotates, the coil spring 12 fixed to the crankshaft 4 rotates while keeping the curved shape by being restricted by the oil supply pipe 11 fixed to the bearing 10, and the lubricating oil 13 causes the coil oil 12 to rotate. By the reed, the oil is sequentially advanced above the oil supply pipe 11 and oil is supplied to the crankshaft 4. As a result, the portion of the crankshaft 4 that needs to be refueled with the rotation of the crankshaft 4 is refueled and lubricated.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above configuration, the crankshaft 4
A space for arranging the curved oil supply pipe 11 that is in communication with the bearing 10 and is fixed to the bearing 10 is required in the longitudinal direction, and the length of the hermetically sealed case 1 of the compressor is increased accordingly, so that the space volume in the hermetically sealed case 1 is increased. It had the drawback of having to do it. Such a large space volume has a problem in that a large amount of refrigerant is required when connected to a refrigeration system by piping, and the sealed case 1 becomes large, resulting in a relatively high material cost. Was there. Further, since the coil spring 12 rotates in the curved oil supply pipe 11 while being forcibly bent, there is a large friction between the inner surface of the oil supply pipe 11 and the outer diameter of the coil spring 12, and this friction causes noise and load. However, there is a problem that the oil supply pipe 11 and the coil spring 12 of the oil supply parts are worn out under severe conditions such as high speed. Further, in order to further improve the oil supply capacity, the coil diameter of the coil spring 12 or the material wire diameter is increased to increase the oil transfer volume formed between the lead of the coil spring 12 and the inner surface of the oil supply pipe 11. However, there is also a problem that it is not possible to improve the refueling capacity as expected because the friction is extremely increased by increasing the coil diameter and the wire diameter.

In view of the above problems, the present invention aims to reduce the size and friction of the hermetically sealed case, reduce noise and load, and prevent wear of parts such as the oil supply pipe and coil spring even under severe conditions such as high speed. (EN) A compressor provided with an oil supply device capable of highly reliable operation by the oil supply device and also capable of freely adjusting the oil supply capacity.

Means for Solving the Problems In order to solve the above problems, a horizontal rotary compressor according to the present invention has a bearing that axially supports a crankshaft, and has an oil supply guide portion having one end opening into the lubricating oil. An oil supply member having the other end communicating with the bearing sliding portion is provided on the bearing on the side opposite to the rotor, and a throttle forming member that constitutes a throttle slidably provided in the oil supply guide portion and one end thereof is the crankshaft end portion. At the eccentric position of
The oil supply device is configured to be rotatably connected and the other end thereof to a connecting member connected to the throttle forming member.

According to the present invention, according to the above configuration, when the crankshaft rotates, one end of the connecting member eccentrically and rotatably connected to the eccentric position of the crankshaft end portion rotates, whereby the other end reciprocates, and the connecting portion The throttle forming member connected to the other end of the member slides reciprocally in the oil supply guide portion with less restriction, that is, less friction. Due to this reciprocating sliding motion, the lubricating oil that has flowed in from the throttle portion in the lubricating oil of the throttle forming member is
The viscosity causes the oil to be sequentially transferred into the oil supply member. Here, the transfer amount of the lubricating oil is either an eccentric distance connecting the connecting member to the end of the crankshaft, adjustment of the oil passage cross-sectional area formed by the oil supply member of the throttle portion, or both of these. Since it can be freely adjusted by combination, oil is supplied and lubricated to the sliding portion that needs oil supply as the crankshaft rotates.

Examples Hereinafter, horizontal rotary compressors according to one embodiment and another embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a horizontal rotary compressor according to an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of an essential part showing another embodiment. In FIG. 1, 31 is a closed case, which is an electric element.
32 and the rotary compression element 33 are integrally housed. 34
Is a stator of the electric element 32, and 35 is a rotor. Reference numeral 36 denotes a crankshaft, to which the rotor 35 is press-fitted and fixed. A roller 37 is rotatably arranged on the circumference of the eccentric part 36a of the crankshaft 36. 38 is a cylinder, 39 is a main bearing 40
A side housing on the side of the rotor 35 that integrally has
A side housing 41, which is fixed to the sealed case 31 by welding and has a bearing 42 integrally, is provided on the side opposite to the rotor 35.
Reference numeral 43 denotes a vane which is in contact with the outer peripheral portion of the roller 37 and partitions the compression chamber 44 formed in the cylinder 38 into a high pressure chamber (not shown) and a low pressure chamber (not shown). An oil supply member 45 is fastened and fixed to the side housing 41 with a bolt 46, and includes an attachment base portion 47 that fits into the bearing 42 and an oil supply guide portion 49 having an opening 48 provided below. The upper end of the refueling guide portion 49 is connected to the mounting base portion 47, and the lower end thereof is the closed case.
The opening 48 is immersed in the lubricating oil 50 stored below 31. One end 51 is an elastic member such as a piano wire having one end rotatably supported by an eccentric mounting part 52 provided at an end eccentric position of the crankshaft 36 and a connecting part 53 provided at the other end. It is a connecting member formed in a shape and extends from the eccentric mounting portion 52 into the oil supply member 45. Reference numeral 55 denotes a diaphragm forming member having one end fixed to the connecting portion 53 and the other end forming a diaphragm 54 at the bottom.

The diaphragm forming member 55 forms a diaphragm 54 in the opening 48 for passage of oil having a cross-sectional area smaller than the opening 48. Alternatively, the diaphragm 54 'may be formed on the outer periphery of the flat plate-shaped diaphragm forming member 55' as in the other embodiment shown in FIG.

Regarding the horizontal rotary compressor configured as described above,
Particularly, the refueling operation will be described.

During operation of the horizontal rotary compressor, the stator 34 of the electric element 32
When the rotor 35 is energized and the rotor 35 is rotated, the crankshaft 36 is rotated, the compression element 33 compresses the refrigerant, and the rotation of the crankshaft 36 rotates the connecting member 51 axially supported by the eccentric mounting portion 52. The throttle forming member 55 is slid back and forth within the oil supply member 45 by eccentrically rotating as shown by a two-dot chain line. Due to this reciprocating sliding movement, the diaphragm 54 of the diaphragm forming member 55 (55 ')
Lubricating oil 50 flowing in from (54 ') is viscous and has oil supply guide 49
The oil gradually rises inside and passes through the oil replenishing member 45, and is lubricated by being lubricated to a sliding portion that needs lubrication as the crankshaft 36 rotates.

As described above, according to the above-described embodiment, the horizontal rotary compressor stores the lubricating oil 50 in the closed case 31, and has the oil supply guide portion 49 whose one end has an opening 48 in the lubricating oil 50. An oil supply member 45 having an end communicating with the bearing sliding portion is provided on the bearing 42 on the side opposite to the rotor 35, and an aperture forming member 55 constituting an aperture 54 (54 ') slidably provided in the oil supply guide portion 49. (Five
5 ') and an eccentric mounting portion 52 at one end of the crankshaft 36
Is rotatably connected to the other end of the diaphragm forming member 55.
By providing the structure of the oil supply device including the connecting member 51 connected to (55 ′), the space volume of the closed case 31 can be reduced and the size can be reduced, and noise and load can be reduced by reducing friction, and the amount of oil supply can be reduced. It can be greatly increased and the oil supply capacity can be adjusted freely by adjusting the throttle.
An oil supply system that does not wear even under severe conditions can be created.

In addition, although the application example of the horizontal rotary compressor is shown in the embodiment, the present invention is not limited to this and can be applied to a reciprocating type or a screw type compressor. Further, the present invention can be applied to a compressor that is used for both vertical type and vertical type and horizontal type, and the range of use is expanded.

EFFECTS OF THE INVENTION As described above, the present invention stores the lubricating oil in the closed case, has the oil supply guide portion having one end opening into the lubricating oil, and has the other end communicating with the bearing sliding portion. Is provided in the bearing on the side opposite to the rotor and one end is rotatably connected to an eccentric position of an end portion of the crankshaft and a throttle forming member that constitutes a throttle slidably provided in the oil supply guide portion,
By providing the oil supply device having the connecting member connected to the throttle forming member at the other end, the space volume of the closed case can be reduced and the size can be reduced, and the material cost can be reduced. In addition, noise and load can be reduced by reducing friction, and parts such as the oil supply pipes of the oil supply system will not wear even under severe conditions of operation, and a more reliable compressor operation will be possible. In addition to greatly increasing the amount, adjust the distance of the eccentric mounting part connected to the crankshaft end of the connecting member of the lubrication part, adjust the oil passage cross-sectional area formed by the throttle part, or a combination of both. The refueling capacity can be easily adjusted only by changing the part. Further, not only the horizontal rotary compressor but also a reciprocating type, a screw type, or a vertical type and a vertical horizontal type compressor can be applied in a wide range of applications.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a horizontal rotary compressor according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of an essential part showing another embodiment, and FIG. 3 is a cross-sectional view of a conventional horizontal rotary compressor. Is. 31 …… closed case, 33 …… compression element, 34 …… stator,
35 …… rotor, 36 …… crankshaft, 36a …… eccentric part, 37
...... Roller, 38 …… Cylinder, 39 …… Side housing, 41 …… Side housing, 42 …… Bearing, 43 …… Vane, 44 …… Compression chamber, 45 …… Lubrication member, 48 …… Aperture, 49…
… Lubrication guide part, 50 …… Lubricating oil, 51 …… Connecting member, 52…
… Eccentric mounting part, 53 …… Coupling part, 54 (54 ′) …… Throttle, 55
(55 ′) …… A diaphragm forming member.

Claims (1)

(57) [Claims] 1. A lubricating oil is stored in a sealed case, and
A crankshaft including a stator press-fitted and fixed to the hermetic case and a rotor driven by the stator, and a crankshaft having an eccentric portion press-fitted and fixed to the rotor, and a compression chamber concentric with a rotation center of the crankshaft. A cylinder, a side housing that hermetically closes both side surfaces of the cylinder, and has a bearing that axially supports the crankshaft, and is attached to the eccentric portion, and along the inner wall of the cylinder by rotation of the crankshaft. A rolling element, a compression element having a vane that is in contact with an outer peripheral portion of the roller and divides the compression chamber into a high pressure chamber and a low pressure chamber, and further has an oil supply guide portion having one end opening into the lubricating oil. , An oil supply member having the other end communicating with the bearing sliding portion is provided on the bearing on the side opposite to the rotor,
A throttle forming member constituting a throttle slidably provided in the oil supply guide portion, one end rotatably connected to an eccentric position of the crankshaft end portion, and the other end connected to the throttle forming member. A horizontal rotary compressor characterized by comprising a refueling device consisting of.