JPH01301986A - Lateral type rotary compressor - Google Patents

Abstract

PURPOSE:To reduce the spatial volume of a sealed case by inserting a loose fitting part in a connecting pin as well as housing an oil supply guide hole. CONSTITUTION:When a rotor 35 is put in rotation with the stator 34 of an electric drive element 32 electrified, a crankshaft 36 makes rotation so that the rotation of th crankshaft 36 forces a connecting pin 52 rotatably supported by an eccentric hole 51 to made eccentric rotation as well as compression of refregerant is carried out by means of a compression element 33. Consequently, a throttle forming part 56 makes reciprocating sliding motion inside an oil supply guide hole 48 and lubricant 57, the lubricant 57 flowing in from the throttle 55 of the throttle forming part 56 rises successively inside an oil sump 47 due to its viscosity so that oil supply to sliding portions requiring oil supply accompanying the rotation of the crankshaft 36 may be carried out.

Description

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

2. Description of the Related Art Conventionally, for oiling a horizontal rotary compressor mounted so that the crankshaft is positioned horizontally, for example, Japanese Patent Publication No. 61-47
As shown in Japanese Patent No. 994, an oil supply system was used in which a coil spring integrated with the crankshaft was placed in a curved oil supply pipe.

Hereinafter, an example of the conventional horizontal rotary compressor mentioned above 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. 4 is a crankshaft to which the rotor 3 is press-fitted and fixed.

A roller 5 is rotatably arranged on the circumference of the eccentric portion 6 of the crankshaft 4. 7 is a cylinder, 8 is a side housing on the side of the rotor 3 which is welded and fixed to the sealed case 1, and 9 is a side housing on the side opposite to the rotor, which integrally has a bearing 1o. Reference numeral 11 denotes a curved oil supply pipe, and inside thereof, a coil spring 12 having an outer diameter close to the inner diameter of the oil supply pipe 11 is integrated with the crankshaft 4.

Reference numeral 13 denotes lubricating oil, which is sealed in the sealed case 1. Regarding the horizontal rotary compressor configured as above, the oil supply operation thereof will be explained in particular. When the horizontal rotary compressor operates, the rotor 3 rotates, and the crankshaft 4 press-fitted into the rotor 3 rotates. When the crankshaft 4 rotates, the coil spring 1 fixed to the crankshaft 4
2 rotates while maintaining its curved shape while being regulated by the oil supply pipe 11 fixed to the bearing 10, and the lubricating oil 13 sequentially advances above the oil supply pipe 11 by the lead of the coil spring 12 to supply oil to the crankshaft 4. be done. As a result, parts that require oil as the crankshaft 4 rotates are supplied with oil and lubricated.

Problems to be Solved by the Invention However, the above configuration requires a tube in which the curved oil supply pipe 11, which communicates with the crankshaft 4 and is fixed to the bearing 1o, is disposed in the longitudinal direction. Since the length of the sealed case 1 is increased, the space inside the sealed case 1 has to be increased. This large space volume requires a large amount of refrigerant to be sealed when piping is connected to the refrigerant stem, and the sealed case 1 becomes large, and the coil spring 12 is tightly wound and has a long material length. It had problems such as relatively high material costs. Furthermore, since the coil spring 12 rotates in a forcibly bent state 1 in the curved oil supply pipe 11, the friction between the inner surface of the oil supply pipe 11 and the outer diameter of the coil spring 12 is large, and this friction causes noise and noise. This increases the load, and under severe conditions such as high speeds, the oil supply parts such as the oil supply pipe 11 and coil spring 12 wear out. Furthermore, in order to improve the oil supply capacity, the oil transfer volume formed between the lead of the coil spring 12 and the inner surface of the oil supply pipe 11 can be increased by increasing the coil diameter of the coil spring 12 or by increasing the material wire diameter. This can be countered by increasing the coil diameter and wire diameter, but since friction increases extremely by increasing the coil diameter and wire diameter, there is also the problem that the lubricating capacity cannot be improved to the extent expected.

In view of the above-mentioned problems, the present invention aims to reduce noise and load by reducing material and friction by downsizing the sealed case and coil spring, and furthermore, the oil supply pipe and coil spring can be used even under severe conditions such as high speeds. The purpose of the present invention is to provide a compressor equipped with a lubricating device that allows highly reliable operation with a lubricating device that does not wear out parts such as the compressor and the like, and can freely increase the lubricating capacity.

Means for Solving the Problems In order to solve the above problems, the horizontal rotary compressor of the present invention stores lubricating oil in a sealed case, and has a bearing for pivotally supporting a crankshaft on a compression element, Further, an oil sump part formed on the bearing on the opposite-to-rotor side by the crankshaft end and a sealing lid provided at an outer end of the bearing, and an oil supply guide hole opening outward from the oil sump part. , a diaphragm forming part forming a diaphragm immersed in the lubricating oil at one end, a loose fitting part bent into a ring shape at the other end, and a connecting part connecting the diaphragm forming part and the loose fitting part; and a connecting pin fixed to an eccentric hole drilled at an eccentric position of the end of the crankshaft, the oil pump is housed in the oil guide hole, and the oil pump is integrally formed with a spring material. , the oil supply device is configured such that the loose fitting portion is fitted into the connecting pin.

According to the present invention, the oil supply member having a short curved shape in the longitudinal direction of the crankshaft is installed inside the bearing, so that the sealed case can be downsized and the rotation of the crankshaft is controlled by oil. When the ring-shaped loose fitting part of the oil supply pump, which is rotatably fitted into a connecting pin fixed at an eccentric position at the end of the crankshaft within the reservoir part, rotates, the other end moves back and forth.
A throttle-forming portion provided in this oil supply pump reciprocates within the oil supply guide hole with little restriction, that is, with little friction. Due to this reciprocating movement, the lubricant in the lubricating oil in the aperture forming part flows into the oil sump part due to its viscosity.
l[I-order transported. Here, the amount of lubricating oil transferred is determined by adjusting the eccentric distance of fitting the loosely fitting part of the oil supply pump into the end of the crankshaft, adjusting the oil passage cross-sectional area formed by the throttle of the throttle forming part, or Since it can be freely adjusted by combining both of these, the sliding parts that require oiling as the crankshaft rotates are supplied with oil and lubricated.

EXAMPLE Hereinafter, a horizontal rotary compressor according to an example 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 sectional view of the main part taken along the line A--A in FIG. 1. Figure 1.

In FIG. 2, reference numeral 31 denotes a closed case in which an electric element 32 and a rotary compression element 33 are integrated and housed. 34
is a stator of the electric element 32, and 35 is a rotor.

36 is a crankshaft to which the rotor 36 is press-fitted and fixed. A roller 37 is rotatably arranged on the circumference of the eccentric portion 38 of the crank lll1l136. 39
is a cylinder, 4o is a side housing on the rotor 36 side that integrally has a bearing 41, and is welded and fixed to the sealed case 31; 42 is a side housing on the side opposite to the rotor 36 that integrally has a bearing 43. A vane 44 is in contact with the outer circumference of the roller 37 and partitions the compression chamber 46 formed within the cylinder 39 into a high pressure chamber (not shown) and a low pressure chamber (not shown). A sealing lid 46 is press-fitted and fixed to the outer end of the bearing 43 of the side housing 42, and a space for an oil reservoir 47 is formed in the bearing 43. Reference numeral 48 designates an oil supply guide hole opening 49 downward from this oil reservoir portion 47 . Reference numeral 50 denotes a connecting portion 6 rotatably fitted into a connecting pin 52 fixed to an eccentric hole 61 provided eccentrically at the end of the crankshaft 36 in the oil sump portion 47.
3 is integrated with an elastic spring material such as piano wire to form a loose fitting part 54 which is bent into a ring shape at one end and a diaphragm forming part 56 having a diaphragm hole 5 for oil passage at the bottom at the other end. The oil supply pump is configured such that it extends into the oil supply guide hole 48 from the connecting pin 62, and further includes the aperture forming portion 6.
6 is configured to be immersed in lubricating oil 57 stored below the sealed case 31. The aperture forming part 66
forms a diaphragm 65 for passage of oil having a cross-sectional area smaller than that of the opening 49.

Regarding the horizontal rotary compressor configured as above, the oil supply operation thereof will be explained in particular.

During operation of the horizontal rotary compressor, the stator 3 of the electric element 32
4 is energized and the rotor 36 rotates, the crankshaft 3
6 rotates and the compression element 33 compresses the refrigerant,
The rotation of the crankshaft 36 is achieved by eccentrically rotating the connecting pin 62 supported by the eccentric hole 51 as shown by the two-dot chain line in FIG. Slide back and forth. Due to this reciprocating movement, the lubricating oil 67 that has flowed in from the orifice 56 of the orifice forming part 56 gradually rises into the oil sump part 47 due to its viscosity, and as the crankshaft 36 rotates, the sliding parts that require lubrication are lubricated and lubricated. be done.

As described above, according to the above embodiment, the horizontal rotary compressor stores the lubricating oil 57 in the sealed case 31, and has the bearing 43 in the compression element 33 that pivotally supports the crankshaft 36, and has the bearing 43 on the side opposite to the rotor 36. The bearing 43 has an oil sump 47 formed by the end of the crankshaft 36 and a sealing lid 46 provided at the outer end of the bearing 43, and an opening 4 extending outward from the oil sump 47.
The diaphragm forming part 68 has a lubrication guide hole 48 having a diameter of 9, a diaphragm forming part 66 forming a diaphragm 66 whose one end is immersed in the lubricating oil 67, and a loose fitting part 64 bent into a ring shape at the other end.
and a connecting portion 53 that connects the loose fitting portion 64, an oil supply pump 60 integrally formed with a spring material, and a connecting pin fixed to an eccentric hole 51 bored at an eccentric position at the end of the crankshaft 36. 52, the oil supply pump 50 is accommodated in the oil supply guide hole 48, and the loose fitting portion 5
4 fitted into the connecting pin 62, the space volume of the sealed case 31 can be reduced and the size can be reduced, the material of the coil spring can be reduced, and noise and load can be reduced by reducing friction. This allows the oil supply capacity to be adjusted freely, and it is possible to create a oil supply system that does not wear out even when operated under severe conditions. In addition, in the example,
Although we have shown an example of the application of a horizontal rotary compressor, the application is not limited to this.
It can also be applied to reciprocating or screw type compressors. Furthermore, it can be applied to a vertical compressor or a compressor that can be used both vertically and horizontally, expanding the scope of use.

Effects of the Invention As described above, the present invention provides an oil sump portion formed by the end of the crankshaft and a sealing lid provided at the outer end of the bearing on the opposite-rotor side bearing that pivotally supports the crankshaft. , a lubricating guide hole opening outward from the oil sump part, a diaphragm forming part forming a diaphragm immersed in the lubricating oil at one end, and a loose fitting part bent into a ring shape at the other end. The oil supply pump is integrally formed of a spring material and includes a connecting part connecting the aperture forming part and the loose fitting part, and a connecting pin fixed to an eccentric hole bored at an eccentric position of the end of the crankshaft. The oil supply device has a configuration in which the oil supply pump is housed in the oil supply guide hole and the loose fitting portion is fitted into the connecting pin, so that the space volume of the sealed case can be reduced and the size can be reduced. Therefore, when comparing the spring material of the oil supply pump with the same oil supply capacity as the conventional one, the material length is 1
It can be reduced considerably and the material cost can be reduced as well. In addition, noise and load can be reduced by reducing friction, and parts such as the oil supply pipe of the oil supply system will not wear out even when operated under severe conditions, allowing highly reliable compressor operation. Being installed inside the housing makes it easy and reduces the number of parts. The refueling pump is easy to assemble due to the structure of the ring-shaped loose fitting part of the connecting part and the connecting pin. Regarding oil supply capacity, it is possible to adjust the eccentric distance of the locking hole at the end of the crankshaft where the loose fitting part of the oil pump fits into the connecting pin, or to adjust the oil passage cross-sectional area formed by the throttle, or a combination of both. It can be easily adjusted by only changing some parts. Furthermore, not only horizontal rotary compressors, but also reciprocating type, null type,
It can be used in a wide range of applications, such as being applicable to both vertical and horizontal compressors.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a horizontal rotary compressor according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of main parts taken along the line A-A in Fig. 1, and Fig. 3 is a conventional horizontal rotary compressor. FIG. 31... Sealed case, 33... Compression element, 34... Stator, 36... Rotor, 36... Crankshaft, 37... ...Roller, 38 ... Eccentric part, 39 ... Cylinder, 40 ... Side housing, 41 ...
...Bearing, 42...Side housing, 43.
... Bearing, 44 ... Vane, 46 ...
... Compression chamber, 46 ... Sealing lid, 47 ...
・Oil reservoir part, 48... Oil supply guide hole, 49...
...Opening, 5o...Oil pump, 61...
...Eccentric hole, 62...Connecting pin, 53...
...Connection part, 54... Loose fitting part, 65...
...Aperture, 66...Aperture 9 forming part, 67...
···Lubricant. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 31... Sealed case 柘... Sealing 1 side... Compression element 47... Oil reservoir portion y,... Stator 48... - Oil supply guide hole 35... Rotor
4E+-...Opening...Crankshaft!
10...Oil pump J...Roller C...
...Eccentric hole...Eccentric part 2...Connecting pin field...Cylinder Day...Encountered part νe...
・Side housing Nu... Play moat part 41.0...
Bearing 5...Ring 2...Vane
5... Ripple formation part 45... Compression chamber
Ji...Katako Oil Diagram 2

Claims (1)

[Claims] an electric element consisting of a stator press-fitted into a sealed case that stores lubricating oil and a rotor facing the stator;
a crankshaft having an eccentric portion press-fitted into the rotor; a cylinder forming a compression chamber concentrically with the rotation center of the crankshaft; both sides of the cylinder hermetically closed; a side housing having a supporting bearing; a roller attached to the eccentric portion and rolling along the inner wall of the cylinder as the crankshaft rotates; a compression element having a vane partitioning into a chamber; and an oil reservoir formed on the bearing on the side opposite to the rotor by the end of the crankshaft and a sealing lid provided on the outer end of the bearing; A lubricating guide hole opening outward from the reservoir, a diaphragm forming part forming a diaphragm immersed in the lubricating oil at one end, a loose fitting part bent into a ring shape at the other end, and the diaphragm forming part. and a connecting part that connects the loose fitting part, and a connecting pin fixed to an eccentric hole bored at an eccentric position of the end of the crankshaft, A horizontal rotary compressor, comprising: a pump housed in the oil supply guide hole; and an oil supply device in which the loose fitting portion is fitted into the connecting pin.