JPH01227880A - Vertical rotary compressor - Google Patents

Abstract

PURPOSE:To reduce the space capacity of a closed case and reduce the material of coiled spring by providing both an oil supply guide member fixed to a side housing inside the closed case and an oil supply pump member contained in the oil supply guide member. CONSTITUTION:A closed case 31 contains lubricating oil 50 and the bearing 43 of a crankshaft 36 is attached to a compression element 33. An oil supply guide member 46 is stuck to a side housing 42. The formation part 55 for a throttle 54, a retaining part 53 bent in the L-shaped form, and an oil supply pump member 51 consisting of a connection part 56 connecting said parts 55 and 53 to each other are placed inside the oil supply guide member 46. A retaining part 53 is inserted into a retaining hole 62 drilled on the terminal part of the crankshaft 36 in the eccentric position. The space capacity of the closed case 31 is reduced and the material of coiled spring is also reduced. Thus the wear may be reduced, the noise and the load are reduced and the reliability is improved.

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. 2 shows a conventional horizontal rotary compressor.

In FIG. 2, 1 is a sealed case, 2 is a stator of an electric element, 3 is a rotor, and 04 is a crankshaft to which the rotor 3 is press-fitted.

6 is a roller rotatably arranged on the circumference of the eccentric portion e of the crankshaft 4; 07 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; 011 is a curved oil supply pipe, and 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. 013 is a lubricating oil and 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 12 fixed to the crankshaft 4 moves to the oil supply pipe 11 fixed to the bearing 1°.
The lubricating oil 13 rotates while maintaining its curved shape.
is sequentially connected to the oil supply pipe 1 by the lead of the coil spring 12.
1, and the crankshaft 4 is supplied with oil. As the crankshaft 4 rotates, the parts that require oil are supplied with oil and the crankshaft 4 is slid.

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. 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 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. Furthermore, since the coil spring 12 rotates in a forcibly bent state within the curved oil supply pipe 11, the inner surface of the oil supply pipe 11 and the coil spring 12 have problems such as high cost. The friction with the outer diameter of the cylinder is large, and this friction increases 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 wear out. was.

Furthermore, in order to improve the oil supply capacity, the oil transfer formed between the lead of the coil spring 12 and the inner surface of the oil supply pipe 11 can be achieved by increasing the coil diameter of the coil spring 12 or by increasing the material wire diameter. This can be done by increasing the volume, but since increasing the coil and wire diameters causes an extreme increase in friction, 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 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, - an oil supply guide member whose end opens into the lubricating oil and whose other end communicates with the sliding part of the bearing and which is fixed to the side housing; and a throttle forming part that is built into the oil supply guide member and forms a throttle. ,
The oil supply pump member includes an engaging portion bent in an abbreviated shape and a connecting portion connecting the aperture forming portion and the engaging portion, and is located at an eccentric position of the end of the crankshaft. The oil supply device has a configuration in which the locking portion is fitted into a drilled locking hole. ◎ Function: With the above structure, the length of the curved shape in the longitudinal direction of the crankshaft can be shortened. By installing the refueling guide member close to the bearing, the sealed case can be made smaller, and the rotation of the crankshaft is controlled by the refueling pump member rotatably attached to an eccentric position at the end of the crankshaft within the refueling guide member. When the bent engagement part rotates, the throttle forming part provided at the other end slides back and forth within the oil supply guide member with less regulation, that is, with less friction.This reciprocating sliding movement causes the throttle to open. The lubricating oil flowing into the lubricating oil of the forming part through the throttle is sequentially transferred into the oil supply guide member due to its viscosity. Here, the amount of lubricating oil transferred can be determined by adjusting the eccentric distance for engaging the engaging part of the oil supply pump member with the end of the crankshaft, adjusting the cross-sectional area of oil passage formed by the constriction of the constriction 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 A horizontal rotary compressor according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a horizontal rotary compressor according to an embodiment of the present invention. In FIG. 1, reference numeral 31 denotes a sealed 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; O37 is a roller; 039 is rotatably disposed on the circumference of the eccentric portion 38 of the crankshaft 36;
is a cylinder, 4o is a side housing on the side of the rotor 36 which integrally has a main 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 36, which integrally has a bearing 43. 44 is a vane that is in contact with the outer circumference of the roller 37 and partitions the compression chamber 45 formed in the cylinder 39 into a high pressure chamber (not shown) and a low pressure chamber (not shown). The oil supply guide member is a fixed oil supply guide member, and includes a mounting base 47 that fits into the bearing 43, and a oil supply guide portion 49 provided with an opening 48 provided below. The upper end of the refueling guide part 49 is connected to the mounting base 47, and the lower end is connected to the sealing case 3.
The opening 48 is immersed in lubricating oil 60 stored below the opening 48 . Reference numeral 61 denotes a fuel pump member made of an elastic spring material such as piano wire, and one end of which is connected to the crankshaft 3.
A bent engagement part 63 is rotatably engaged with an engagement hole 62 provided eccentrically at the end of the frame 6, and the other end has an aperture 64, which is an oil passage hole, at the bottom. A forming portion 66 is formed, and a connecting portion 5e connecting the engaging portion 63 and the diaphragm forming portion 66 is formed. The oil supply pump member 61 extends into the oil supply guide member 46 from the engagement hole 62,
The constriction forming portion 56 is arranged to be immersed in the lubricating oil 60 within the oil supply guide portion 49. The aperture forming portion 65 forms within the aperture 48 a aperture 54 having a cross-sectional area smaller than the aperture 48 through which oil passes.

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 portion 56, which is supported by the engagement hole 62, as shown by the two-dot chain line in FIG. Slide back and forth. Due to this reciprocating sliding movement, the lubricating oil 50 that has flowed in from the orifice 64 of the orifice forming part 66 rises into the oil supply guide part 49 due to its viscosity, and the oil supply guide member 4
6, the sliding parts that require oiling as the crankshaft 3e rotates are supplied with oil and lubricated.

As described above, according to the above embodiment, the horizontal rotary compressor stores the lubricating oil 6o in the sealed case 31, and has the bearing 43 for pivotally supporting the crankshaft 36 in the compression element 33, and one end is connected to the lubricating oil 6o. An opening 48 is formed in the oil 60, and the other end is connected to the bearing 4.
A refueling guide member 46 that communicates with the sliding portion of No. 3 and is fixed to the side housing 42 and the refueling guide member 4
6, a diaphragm forming part 56 that forms a diaphragm 64, an engaging part 63 bent in an abbreviated shape, and a connecting part 66 that connects the diaphragm forming part 66 and the engaging part 63. The oil supply device has a pump member 61 and the locking portion 63 is fitted into a locking hole 62 bored at an eccentric position of the end of the crankshaft 3e. The space volume can be reduced, making it more compact, reducing the amount of material used for coil springs, reducing noise and load by reducing friction, making it possible to freely adjust the lubrication capacity, and creating a lubrication system that does not wear out even when operated under severe conditions. .

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 and has a bearing for pivotally supporting a crankshaft in a compression element, one end of which opens into the lubricating oil, and the other end of which is opened into the lubricating oil. A refueling guide member that communicates with the sliding portion of the bearing and is fixed to the side housing; an aperture forming portion that is built into the refueling guide member and forms a restrictor; an engaging portion that is bent in an abbreviated shape; a refueling pump member including a connecting part connecting a throttle forming part and the engaging part, and the engaging part is fitted into an engaging hole bored at an eccentric position of the end of the crankshaft. By having the structure of the oil supply device, the space volume of the sealed case can be reduced, making it more compact, and the length of the spring material for the oil supply pump can be reduced to 10% compared to a conventional one with the same oil supply capacity. Costs can also 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. The oil supply capacity can be easily adjusted by adjusting the eccentric distance of the locking hole that locks the part to the end of the crankshaft, adjusting the oil passage cross-sectional area formed by the throttle, or by partially changing the combination of both. can.

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... Rotor, 36... Crankshaft, 37... ...Roller, 38...Eccentric part, 39...Cylinder, 4o...Side housing, 42...
...Side housing, 43...Bearing, 4
4... Vane, 45... Compression chamber, 46
...Refueling guide member, 48...Opening,
49... Oil supply guide part, 5o... Lubricating oil, 61... Oil supply pump member, 62...
- Attachment hole, 63...Connection part, 64...
Engaging portion, 55... diaphragm, 66... diaphragm forming portion. Name of agent: Patent attorney Toshio Nakao and 1 other person
Stator opening 35- Rotor 4? -Pakyu Aneurysm Guide Country 43- Shima Haku ★ 55--1 Ichito Ri
Shape J (Futo 4-vane 56-4 Minato part

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 compression element has a roller that rolls along the inner wall of the cylinder due to rotation of a shaft, and a compression element having a vane in contact with the outer circumference of the roller to partition the compression chamber into a high-pressure chamber and a low-pressure chamber, and one end of which is connected to the lubrication chamber. an oil supply guide member that opens into oil, the other end communicates with the sliding part of the bearing, and is fixed to the side housing; a throttle forming part that is built in the oil supply guide member and forms a throttle; The oil supply pump member includes an engaging part bent in a letter shape and a connecting part that connects the aperture forming part and the engaging part, and is bored at an eccentric position of the end of the crankshaft. A horizontal rotary compressor, characterized in that it is equipped with an oil supply device formed by fitting the engagement portion into an engagement hole.