JPH01271689A - Horizontal rotary compressor - Google Patents

Abstract

PURPOSE:To reduce the size of an enclosing case by incorporating an oil-supply pump member, consisting of a throttle-forming portion and an engaging portion which is approximately bent into the shape of an L, into an oil-supply tube portion fixed to a side housing and installing an oil-supply guide member close to a bearing. CONSTITUTION:An oil-supply tube portion 46 is fixed to a side housing 42. Its upper end connects to a mounting portion 48, while its lower portion has an opening 49 immersed in lubricating oil 51 kept in the bottom portion of an enclosing case 31. An oil-supply pump member 52 is made of spring material having elasticity such as piano wire, formed integrally with a coupling portion 54 rotatably engaged with an engaging hole 53 eccentrically made in the end of a crankshaft 36, one end of the coupling portion 54 is approximately bent into the shape of an L to form an engaging portion 55, and the other end of the coupling portion 54 serves as a throttle-forming portion 57 having a throttle 56 for an oil passage hole in its bottom portion.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Application Public Funds 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. 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 Tsuruki 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 10. 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 rotor 3
The crankshaft 4 press-fitted and fixed to rotates. When the crankshaft 4 rotates, the coil spring 12 fixed to the crankshaft 4 is regulated by the oil supply pipe 11 fixed to the bearing 10 and rotates while maintaining its curved shape. The oil supply pipe 11 is sequentially connected by the lead.
, and the crankshaft 4 is supplied with oil. 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, 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 10, and the compressor Since the length of the sealed case 1 becomes large, the space volume 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 a refrigeration system, which results in a large sealed case 1, and the coil spring 12 is tightly wound and has a long material length. It had problems such as high cost. Furthermore, as the coil spring 12 rotates in a forcibly bent state within 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 This will increase noise and load, and under severe conditions such as high speeds, the oil supply parts such as the oil supply pipe 11 and coil spring 12 will wear out! It had a lI point. Furthermore, in order to improve the oil supply capacity, the oil transfer volume formed between the lead of the coil spring 1z and the inner surface of the oil supply pipe 11 can be increased by increasing the fill 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 there is also the problem that friction increases extremely by increasing the coil diameter and wire diameter.Secondly, there is also the problem that the lubricating capacity cannot be improved as much as 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. 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 To solve the above problems, the horizontal rotary compressor of the present invention stores lubricating oil in a sealed case and has a bearing on the compression element that pivotally supports the crankshaft. , - an oil supply pipe part fixed to the side housing, comprising an oil supply guide part whose end opens into the lubricating oil and a mounting part communicating with the sliding part of the bearing; an oil supply pump member integrally formed from a spring material including a diaphragm forming part, an engaging part bent in an abbreviated shape, and a connecting part connecting the diaphragm forming part and the engaging part. , the oil supply device is configured such that the engaging portion is fitted into an engaging hole bored at an eccentric position of the end of the crankshaft.

Effects of the present invention With the above configuration, the oil supply guide member with a short curved shape in the longitudinal direction of the crankshaft is provided close to the bearing, so that the sealed case can be downsized and the crankshaft can be When the bent engagement part of the fuel pump member, which is rotatably engaged with the end eccentric position of the crankshaft in the oil supply pipe section, rotates, the other end moves reciprocatingly, and the other end moves back and forth. The provided throttle forming portion slides back and forth within the oil supply pipe portion with less restriction, that is, with less friction.

Due to this reciprocating sliding movement, the lubricating oil flowing through the throttle in the lubricating oil of the throttle forming portion is sequentially transferred into the oil supply pipe portion due to its viscosity. Here, the amount of lubricating oil transferred is determined by the eccentric distance for engaging the engaging portion of the oil supply pump member with the end of the crankshaft, or by adjusting the oil passage cross-sectional area formed by the orifice 9 of the aperture forming portion. Since it can be freely adjusted by either or a combination of both, the sliding parts that require oiling as the crankshaft rotates are supplied with oil and lubricated.

EXAMPLE Hereinafter, a horizontal rotary press machine 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. In Figure 1, 31 is a closed case, f4
1ib element 32 and rotary compression element 33 are integrated and housed. 34 is a stator of the a-dynamic element 32, 35
is the rotor. Reference numeral 36 denotes a crankshaft to which the above-mentioned crankshaft 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
0 is a side housing of the rotor 3561 which integrally has a bearing 41 and is welded and fixed to the sealed case 31, and 42 is a side housing on the side opposite to the rotor 35 which integrally has a bearing 43. 44 is a compression chamber 4 formed in the cylinder 39 in contact with the outer circumference of the roller 37;
5 into a high pressure chamber (not shown) and a low pressure chamber (not shown). Reference numeral 46 denotes a side housing 42 (an oil supply pipe portion that is tightened and fixed by a ζ port 47, and is configured by press-fitting and fixing an oil supply guide portion 50 having a mounting 1s48 that fits into the bearing 43 and an opening 49 provided below). The upper end of the oil supply guide part 5o is connected to the mounting part 48, and the lower end of the opening 49 is immersed in lubricating oil 51 stored below the sealed case 31. 52 is the crankshaft 36 One end of a connecting part 54 rotatably engaged with an engaging hole 53 provided eccentrically at the end thereof is bent into an engaging part 55, and the other end has an aperture with an oil passage hole at the bottom. 56 and an aperture forming part 57, which is integrally formed of an elastic spring material such as a piano forest, and extends into the oil supply pipe part 46 from the engagement hole 53.

The aperture forming portion 57 is configured to be immersed in the lubricating oil 51 within the target oil supply guide portion 50.

The aperture forming portion 57 is located within the opening 49.
This is to form a drawing hole 56 with a smaller cross-sectional area for the passage of oil.

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 36
rotates to compress the refrigerant in the compression element 33, and the rotation of the crankshaft 36 is caused by the engagement part 5 which is pivotally supported in the engagement hole 53.
5 is eccentrically rotated as shown by the two-dot chain line in FIG. Due to this reciprocating sliding 74th, the lubricating oil 51 that has flowed in through the orifice 56 of the orifice forming part 57 becomes viscous and reaches the oil supply guide part 5.
As the crankshaft 36 rotates, the sliding parts that require lubrication are supplied with oil and lubricated.

As described above, according to the above embodiment, the horizontal rotary compressor stores the lubricating oil 51 in the sealed case 31, and has the bearing 43 that pivotally supports the crankshaft 36 in the compression element 33, and one end is connected to the lubricating oil 51. Oil supply guide part 50 having an opening 49 into oil 51
and a mounting portion 48 whose other end communicates with the sliding portion of the bearing 43, an oil supply pipe portion 46 fixed to the side housing 42, and an orifice 9 forming portion built into the oil supply pipe portion 46 and forming an orifice 56. 57, an engaging portion 55 bent in an abbreviated shape, and a connecting portion 54 that connects the diaphragm forming portion 57 and the engaging portion 55. The space volume of the sealed case 31 can be reduced by providing the structure of the oil supply device in which the engaging portion 55 is fitted into a retaining hole 53 bored at an eccentric position at the end of the crankshaft 36. It is smaller in size, the material used for the coil spring can be reduced, noise and load are reduced by reducing friction, the lubrication capacity can be freely adjusted, and a lubrication device that does not wear out even when operated under severe conditions can be created. In the embodiment, an application example of a horizontal rotary compressor is shown, but the present invention is not limited to this, and can also be applied to a reciprocating type or a screw type compressor. 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 stores lubricating oil in a sealed case, has a bearing for pivotally supporting a crankshaft in a compression element, and has an oil supply guide portion with one end opening into the lubricating oil. An oil supply pipe part that is fixed to the side housing and includes a mounting part that communicates with the sliding part of the bearing, an aperture forming part that is built into the oil supply pipe part and forms a throttle, and an engagement that is bent in an abbreviated shape. and a coupling part connecting the extra-calibration forming part and the engaging part, and a lubricating pump member integrally formed from a spring material, the engaging part being bored at an eccentric position on the end of the crankshaft. By providing the structure of the oil supply device in which the engaging portion is fitted into the matching hole, the space volume of the sealed case can be reduced and the size can be reduced, and the spring material of the oil supply pump member has the same oil supply capacity as the conventional one. In comparison, the material length can be reduced by 10% and the material cost can be reduced. In addition, noise and load are reduced by reducing friction, and parts such as the oil supply pipe of the oil supply system do not wear out even when operating under severe conditions, allowing highly reliable compressor operation. By separating the oil supply guide part and the oil supply guide part, press workability and productivity can be improved respectively, and the oil supply guide part and the mounting part can be easily assembled by being fixed by press fitting. Regarding oil supply capacity, it is possible to adjust the eccentric distance of the engagement hole that disguises the engagement part of the oil supply pump member as the end of the crankshaft, 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, it can be applied not only to horizontal rotary compressors, but also to reciprocating type, screw type, vertical type, and vertical/horizontal type compressors, allowing for a wide range of applications.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a horizontal rotary compressor according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional horizontal rotary compressor. 31... Sealed case, 33... Compression element, 34... Stator, 35... Quaternary, 36... Crankshaft, 37 ...Roller, 38 ... Center width, 39 ... Cylinder,
40...Side housing, 41...
Bearing, 42...Side housing, 43・Old・
・Bearing, 44...Pane, 45...Pressure chamber 11, 46...Oil supply pipe section, 48...
Mounting part, 49... Opening, 5°... Oil supply guide part, 51... Lubricating oil, 52... Oil supply pump member, 53...・Engagement hole, 54...
...Connection part, 55...Engagement part, 56...
- Aperture, 57...Aperture forming part. Name of agent: Patent Attorney Toshio Tsuchinakao (1 person) Figure 1

Claims (1)

[Claims] Lubricating oil stored in a sealed case, a stator press-fitted into the sealed case, a rotor driven by the stator, a crankshaft having an eccentric part press-fitted into the rotor, and rotation of the crankshaft. a cylinder that forms a compression chamber concentrically with the center; a side housing that airtightly closes both sides of the cylinder and has bearings that pivotally support the crankshaft; a compression element having a roller that rolls along the inner wall of the cylinder, a pane that comes into contact with the outer periphery of the roller and partitions the compression chamber into a high pressure chamber and a low pressure chamber, and an oil supply guide portion that opens into the lubricating oil at one end. and a mounting portion communicating with the sliding portion of the bearing, an oil supply pipe portion fixed to the side housing, a throttle forming portion built in the oil supply pipe portion and forming a throttle, and bent into a substantially L-shape. The oil supply pump member is integrally formed from a spring material and includes an engaging portion that connects the aperture forming portion and the engaging portion. A horizontal rotary compressor in which the engaging portion is fitted into a provided engaging hole.