JPH01232192A - Horizontal rotary compressor - Google Patents

Abstract

PURPOSE:To house an oil feeder in a side housing as well as to make a hermeti cally sealed case compact in size by installing an oil filler hole in the side housing, and housing a straight-pipelike lubrication pump, with a loose fitting hole at one end, in this oil filler hole free of slide motion. CONSTITUTION:A vane spring 46 is situated in each other circumferential surface of a vane 44 and a side housing 42, and it forms an almost semicircular form and simultaneously presses the vane 44 to the outer circumferential surface of a roller 37. As for an oil filler hole 52, its one end is interconnected to a bearing 43 and the other end is led to an opening 53 in lubricating oil 54. This oil filler port 52 is installed in the side housing 42, and a straight-pipelike lubrication pump 55 with a loose fitting hole 56 at the one end is housed in the oil filler hole 52 free of slide motion, while the vane spring 46 is fitted in this loose fitting hole 56.

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 above-mentioned conventional horizontal rotary pressure 7 refrigerating machine will be described with reference to the drawings.

FIG. 2 shows a conventional horizontal rotary compressor.

In FIG. 2, 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.
It has a holder 1o integrally. Reference numeral 11 denotes a curved oil supply pipe, inside which 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.

The oil supply operation of the horizontal rotary compressor configured as above will be explained.

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 12 fixed to the crankshaft 4 moves to the oil supply pipe 11 fixed to the bearing 1°.
The lubricating oil 13 is sequentially advanced upward through the oil supply pipe 11 by the lead of the coil spring 12, and is supplied to the crankshaft 4. As a result, the parts that require oiling as the crankshaft rotates 40 times are supplied with oil and lubricated.

Problems to be Solved by the Invention However, with the above configuration, space is required to longitudinally arrange the curved oil supply pipe 11 that communicates with the crankshaft 4 and is fixed to the bearing 1o. Since the length of the sealed case 1 is increased, the space inside the sealed case 1 has to be increased in volume. This large space volume means that when piping is connected to the refrigeration system, a large amount of refrigerant must be sealed and the dust sealing case 1 is large, and the coil spring 12 is tightly wound and the length of the material is long. It had problems such as high cost. Furthermore, the coil spring 12 rotates in a forcibly bent state inside the curved oil supply pipe 11! Due to this, 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 increases noise and load. There were problems such as the coil spring 12 etc. being worn 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/L/diameter and wire diameter, there is also the problem that the lubricating ability 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 oil supply device, and furthermore, the oil supply pipe and coil spring can be used even under severe conditions such as high speeds. It is an object of the present invention to provide a compressor equipped with a lubricating device that can operate with high reliability with a lubricating device that does not wear out parts such as the compressor, and can freely adjust the lubricating capacity.

Means for Solving the Problems In order to solve the above problems, the horizontal rotary compressor of the present invention has a side housing that stores lubricating oil in a sealed case and has a bearing that pivotally supports a crankshaft, a roller mounted on an eccentric portion of the shaft and transmitting power along the inner wall of the cylinder as the crankshaft rotates; a vane that contacts the outer circumference of the roller to partition the compression chamber into a high pressure chamber and a low pressure chamber; and an outer periphery of the side housing. The vane is located on the surface and forms a substantially semicircular arc shape, and one end is locked to the lower end of the vane, the other end is locked to a position facing the vane of the cylinder, and the vane is attached to the outer circumferential surface of the roller. a straight pipe-shaped oil supply pump having a vane spring in pressure contact with the side housing, an oil supply hole having one end communicating with the bearing and the other end opening into the lubricating oil, and having a loose fitting hole at one end; is slidably accommodated in the oil supply hole, and the vane spring is fitted into the loose fitting hole.

Substitute According to the present invention, with the above configuration, the oil supply device, which largely extends in the longitudinal direction of the crankshaft, is installed inside the side housing, thereby making it possible to downsize the sealed case. The crankshaft transmits the roller along the inner wall of the cylinder, and the vane in contact with the outer circumference of the roller slides back and forth within a vane groove formed in the cylinder.

Along with this reciprocating movement, the vane spring that presses the vane traces a fan-shaped trajectory using the position where it is locked on the opposite side of the vane groove of the cylinder as a fulcrum, and is displaced to follow the vane. In conjunction with the displacement of the vane spring, the oil supply pump slides back and forth within the oil supply hole provided in the side housing. Furthermore, due to the reciprocating sliding of this oil supply pump, the lubricating oil that has flowed from one end of the oil supply pump among the 14 lubricating oils is sequentially transferred into the oil supply hole due to its viscosity. Here, the amount of lubricating oil transferred can be determined by adjusting the oil passage cross-sectional area by a restriction formed by the inner diameter of the oil supply pump and the vane spring fitted to the oil supply pump, by adjusting the displacement distance of the vane spring, or by adjusting the displacement distance of the vane spring. You can freely adjust the combination of both. That is, due to the reciprocating sliding of the oil supply pump with less friction, 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 shows a cross section taken along the line A--A in FIG. 1. FIG. 3 shows an enlarged cross-section of the main part taken along the line B--B in FIG. 2.

In FIGS. 1, 2, and 3, reference numeral 31 denotes a sealed case in which an electric element 32 and a rotary compression element 33 are integrally housed. 34 is a stator of the electric element 32;
6 is a rotor. 36 is a crankshaft which connects the rotor 35
is press-fitted and fixed.

A roller 37 is rotatably arranged on the circumference of the eccentric portion 38 of the crankshaft 36. 39 is a cylinder, 4
o is a side housing of the rotor 3511 that integrally has a bearing 41, and is fixed to the sealed case 31 by welding. Reference numeral 42 designates a side housing on the side opposite to the rotor 36, which integrally includes a bearing 43. 44 is a compression chamber 4 formed in the cylinder 39 in contact with the outer circumference of the roller 37;
6 into a high pressure chamber (not shown) and a low pressure chamber (not shown), and is housed in a vane groove (not shown) formed in the cylinder 39. Reference numeral 46 denotes a vane spring forming a curved portion 47 in the shape of a semicircular arc, and a first locking portion 48 having one end bent into a substantially U-shape is inserted into a locking hole 49 provided on the outer end surface of the vane 44. A second locking portion 50 that is locked and whose other end is bent into an abbreviated shape is connected to the cylinder 390 through hole 5.
It is installed on 1. 52 is the side housing 42
an oil supply hole communicating with the bearing 43 from the lower outer end surface of the
An opening 63 at one end thereof is immersed in the lubricating oil 54. 6
Reference numeral 5 denotes a straight pipe-shaped oil supply pump whose one end communicates with the other end of which the vane spring 46 is fitted into the loose fitting hole 56 to form a throttle 67, and the other end slides into the opening 53 of the oil supply hole 52. It is freely configured.

The aperture 57 forms an oil passage having a smaller cross-sectional area than the opening 53 within the opening 53 of the oil supply hole 52.

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 35 rotates, the crankshaft 3
6 rotates and the compression element 33 compresses the refrigerant,
The rotation of the crankshaft 36 causes the roller 37 to roll, and the curved portion 47 of the vane spring 46 is displaced as the vane 44 slides back and forth, so that the vane spring 4eK
The oil supply pump 55, which has been stopped in the H position, will now reciprocate and slide within the oil supply hole 62, as shown by the two-dot chain line in FIG. Due to this reciprocating movement, the lubricating oil 54 flowing through the throttle 57 gradually rises into the oil supply hole 52 due to its viscosity, and as the crankshaft 36 rotates, the sliding parts that require oiling are supplied and lubricated.

As described above, according to the above embodiment, the yellow type rotary compressor stores the lubricating oil 54 in the sealed case 31, and has the side housing 40, 42 which has the bearings 41, 43 that pivotally supports the crankshaft 36. The cylinder 39 is attached to the eccentric portion 38 of the crankshaft and is rotated by the rotation of the crankshaft 36.
a roller 37 that rolls along the inner wall of the
A vane 44 is located on the outer circumferential surface of the side housing 42 to partition the compression chamber 46 into a high pressure chamber (not shown) and a low pressure chamber (not shown). is engaged with the lower end of the vane 44, and the other end is engaged with the cylinder 39 at a position facing the vane 44.
1-S, a vane spring 46 that presses the vane 44 against the outer circumferential surface of the roller 37, one end of which is connected to the bearing 4;
An oil supply hole 62 that communicates with 3 and has an opening 53 into the lubricating oil 54 at the other end is bored in the side housing 42, and a straight pipe-shaped oil supply pump 55 having a loose fitting hole 56 at one end is inserted into the miJ oil supply hole 52. The loose fitting hole 6
6 and the vane spring 46 fitted into the oil supply device, the space volume of the sealed case 31 can be reduced and the size of the oil supply device can be reduced, the number of parts and materials for the oil supply device can be reduced, and noise and load can be reduced by reducing friction. It is possible to reduce the oil supply capacity, freely adjust the oil supply capacity, and create a oil supply system that does not wear out even when operated under severe conditions. In addition, in the example, an application example was shown in which a single oil supply pump of a different type rotary compressor was installed inside the side housing on the side opposite to the rotor, but the present invention is not limited to this, and multiple oil supply pumps may be installed in parallel. Alternatively, it can be installed in the side housing between all rotors of a single or multiple fuel pumps. Furthermore, it can be applied to compressors that can be used for both vertical and horizontal types, expanding the scope of use.

Effects of the Invention As described above, the present invention has a nide housing which stores lubricating oil in a non-closable case and has a bearing for pivotally supporting a crankshaft, and a mJ crankshaft which is attached to a central part of the crankshaft. A roller that transmits power along the inner wall of the cylinder by the rotation of the shaft, a vane that contacts the outer circumference of the roller and partitions the compression chamber into a high pressure chamber and a low pressure chamber, and a vane that is located on the outer circumference of the side housing and has a substantially semicircular arc shape. and a vane sling having one end locked to the lower end of the vane, the other end locked to a position of the cylinder facing the vane, and the entire vane in pressure contact with the outer peripheral surface of the roller, An oil supply hole having one end communicating with the bearing and the other end opening into the lubricating oil is drilled in the side housing, and is slidable into the oil supply hole in the form of a straight pipe having a loose fitting hole at one end. Along with storing it in.

By providing a structure in which the oil supply device is formed by fitting the vane spring into the play hole, the oil supply device, which largely extends in the longitudinal direction of the crankshaft, is internally disposed within the side housing, thereby making it airtight. The space volume of the case can be reduced, making it compact, and the parts materials for the oil supply system are also large.
g, and material costs can be reduced. 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. The oil supply capacity can be easily adjusted by adjusting the oil passage cross-sectional area, the displacement distance of the vane spring, or a combination of both. In the Futon example, we have shown an example in which a single oil supply pump for a VJ type rotary compressor is installed inside the side housing on the side opposite to the rotor, but it is possible to install several oil supply pumps in parallel or A single or multiple oil supply pumps can be installed inside the side housing on the rotor side. Furthermore, these compressors can be applied to both vertical and horizontal compressors, expanding the scope of use.

[Brief explanation of the drawing]

FIG. 1 shows 11. of a horizontal rotary compressor in one embodiment of the present invention. lt sectional view Figure 2 is a sectional view taken along the line A-A in Figure 1;
FIG. 3 is an enlarged view of a main part taken along the line B--B in FIG. 2, and FIG. 4 is a cross-sectional view of a conventional horizontal rotary compressor. 31... Sealed case, 34... Stator, 35... Rotor, 36... Crankshaft, 37... Roller, 38... ...Eccentric part, 39...Cylinder, 4Q...Side housing, 41...Bearing, 42...
・Side Housing, 43... State Party, 44...
...Vane, 46...Pressure 4 heat chamber, 46...
...Vane spring, 48...' floor stop, 49...first locking hole, 60...second
・Thread stop part, 51...Through hole, 52...
Supply hole, 53... Opening, 64... Lubricating oil, 56... Oil pump, 56... Loose fitting hole, 57... ...Aperture. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure j. Figure 3 Figure 4

Claims (1)

[Claims] a crankshaft that stores lubricating oil in a sealed case and includes a stator that is press-fitted and fixed to the sealed case; and a rotor that is driven by the stator; and that has an eccentric part that is press-fitted and fixed to the rotor; a cylinder that forms a compression chamber concentrically with the center of rotation of the shaft; a side housing that airtightly closes both sides of the cylinder and has a bearing that pivotally supports the crankshaft; a roller that rolls along the inner wall of the cylinder due to the rotation of the shaft; a vane that contacts the outer periphery of the roller and partitions the compression chamber into a high pressure chamber and a low pressure chamber; a vane spring forming an arc shape, having one end locked to a lower end of the vane, the other end locked to a position facing the vane of the cylinder, and pressing the vane against the outer circumferential surface of the roller; drilling an oil supply hole in the side housing, one end communicating with the bearing and the other end opening into the lubricating oil;
The oil supply device is characterized in that a straight pipe-shaped oil supply pump having a loose fitting hole at one end is slidably housed in the oil supply hole, and the vane spring is fitted into the loose fitting hole. Horizontal rotary compressor.