JPH0688584A - Horizontal rotary compressor - Google Patents

Abstract

PURPOSE:To improve the extent of reliability by making sufficient oiling feedable even to a blade at the side where it is not used as a blade pump. CONSTITUTION:This compressor is featured that a first cylinder 36 and a second cylinder 37 are combinedly installed via a partition plate 38, while one blade 45 out of both first and second blades 45 and 46 housed each in these first and second cylinders is used as a lubrication pump for the sliding surface of a compressive element, and in this constitution, there is formed an oil feeding passage 54 which conducts oil into the second cylinder 37 from a blade chamber 49 of the first cylinder 36, while an outlet part 54b of this oil feeding passage 54 is opened so as to adjoin a blade groove 50 of the second cylinder 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal rotary compressor in which one of the blades also serves as an oil supply pump.

[0002]

2. Description of the Related Art Conventionally, there is a horizontal rotary type compressor in which the blade has not only its original function but also a function as an oil supply pump to improve the lubrication efficiency. FIG. 9 is a cross-sectional view showing a conventional example (actual opening 63-150779) of this type of horizontal rotary compressor.

Reference numeral 10 is a hermetic casing, and inside the hermetic casing 10, there are an electric motor section 11 and a compressor section 1.
2 are housed. The electric motor section 11 includes a stator 13 and a rotor 14. One end of a crank shaft 15 is fixed to the rotor 14, and the other end of the crank shaft 15 is rotatably supported by a main bearing 16 and a sub bearing 17 that form the compressor unit 12. The cylinder 18 is provided so as to be sandwiched between the main bearing 16 and the auxiliary bearing 17, and inside the cylinder 18, an eccentric crank portion 19 provided on the crankshaft 15 and a roller fitted externally to the crank portion 19 are provided. 20 and blade 2
1 is housed therein, and a compression chamber 22 is formed. The blade 21 is a compression spring 2 provided in the blade chamber 23.
4 urges the cylinder 18 to the radial center. Therefore, as the crankshaft 15 rotates, the volume of the compression chamber 22 surrounded by the outer peripheral surface of the roller 20, the inner peripheral surface of the cylinder 18, and the blade 21 changes, and the gas is compressed.

In order to add the function of the blade 22 as an oil supply pump for sending lubricating oil to each sliding portion of the compressor section 12, an oil supply pipe 25 connects the blade chamber 23 and the shaft end of the crankshaft 15. Are connected as. A suction port 27 is bored in the oil supply pipe 25.
Therefore, when the blade 21 rises, the closed casing 1
The oil in the oil sump at the bottom of 0 is fed from the suction port 27 to the blade chamber 2
3 is sucked in and is pushed out as the blade 21 descends. The oil that has been pushed out is refueling pipe 25
The main bearing 16, the sub bearing 17, the roller 20, and the blade 21 are replenished to a predetermined sliding surface which requires lubrication. By the way, the above is an example of a compressor having a single cylinder type, but in a so-called twin rotary type compressor provided by connecting two cylinders, one of two blades is used. It is used as a fuel pump.

[0005]

Conventionally, in the horizontal rotary type compressor, if the blade is provided on the vertical line, the oil supply is stable, but the suction pipe protrudes from the bottom surface of the closed casing, and the height of the compressor increases. Due to the large size, there is a type in which the blade is inclined obliquely downward with respect to the vertical line so that the suction pipe does not project vertically in the closed casing. In the twin rotary type compressor of this type, the blade not used as the oil supply pump is lubricated by the oil accumulated in the blade chamber therebelow. However, in this type, the height of the blade when the blade descends most becomes higher than that of the type in which the blade reciprocates in the vertical direction. For this reason, when the amount of oil is sufficient and the level of the oil surface is high, sufficient oil accumulates in the blade chamber and lubrication is also sufficiently performed, but when the amount of oil decreases, it is not used as an oil pump. There is a drawback that it is difficult to refuel the blade on the side. Therefore, an object of the present invention is to provide a horizontal rotary compressor that solves the problems of the above-mentioned conventional technology and enables sufficient lubrication to the blade not used as a blade pump to improve reliability. To do.

[0006]

In order to achieve the above-mentioned object, the present invention relates to a first cylinder, which comprises a compression element and an electric element connected to each other by a crankshaft in a closed casing to form the compression element. The two cylinders are continuously arranged via a partition plate, and one of the first blade and the second blade housed in the first cylinder and the second cylinder slides on the compression element. In the horizontal rotary compressor used as a pump for supplying lubricating oil to the surface, an oil supply path for guiding oil from the blade chamber of the first cylinder to the second cylinder is formed, and an outlet portion of this oil supply path is the first section. The opening is formed so as to face the blade groove of the two cylinders.

[0007]

The oil is replenished to the sliding surface of the compression element by the reciprocating movement of the first blade used as the oil supply pump, and the replenishment is insufficient when the level of the oil surface decreases. As for the blade, the oil pushed out by the first blade passes through the oil supply passage of the partition plate and is sufficiently replenished from its outlet. Since the outlet portion of the oil supply path is open to the blade groove above the blade chamber, the blade chamber of the first cylinder and the blade chamber of the second cylinder are not always connected by the second blade. As a result, the original efficiency of the first blade as the oil supply pump does not decrease.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a horizontal rotary type compressor according to the present invention will be described below with reference to the accompanying drawings. Figure 1
FIG. 2 is a sectional view of the entire horizontal rotary compressor according to this embodiment. Reference numeral 30 is a closed casing, 31 is an electric motor section,
Reference numeral 32 represents a compression unit. The electric motor section 31 is composed of a stator 33 fixed to the inner peripheral surface of the closed casing 30 and a rotor 34 loosely fitted inside the stator 33. A crankshaft 35 that connects the electric motor unit 31 and the compression unit 32 is press-fitted into the rotor 34. On the other hand, in the compression section 32, the first cylinder 36 and the second cylinder 37 are continuously arranged so as to overlap with each other with the partition plate 38 interposed therebetween, and a fixed frame 39 for integrally mounting these is provided.
It is configured as a multistage cylinder fixed to the closed casing 30 by a. The end of the crankshaft 35 opposite to the rotor 34 is inserted into the first cylinder 36 and the second cylinder 37, and the first cylinder 36, the second cylinder 37
The main bearing 39 and the sub bearing 4 are provided on one side of each of the cylinders 37.
It is rotatably supported by 0.

Further, inside the first cylinder 37, an eccentric first crank portion 41 of the crankshaft 35 and a first roller 42 fitted onto the first crank portion 41 are accommodated. Similarly, the second crank portion 43 is also provided inside the second cylinder 37.
And the second roller 44 is housed.

2 is a longitudinal sectional view showing the details of the compression section 32, FIG. 3 is a side view of the auxiliary bearing 40, and FIG. 4 is a side view of the first cylinder 36. The second cylinder 37 has the same structure, and its constituent elements are shown in parentheses in the drawing. A first blade 45 and a second blade 46 are provided on the first cylinder 36 and the second cylinder 37, respectively.
First blade groove 47, second blade groove 4 in which
8 and a first blade chamber 49 and a second blade chamber 50 are formed. The first cylinder 36 and the second cylinder 37 are fixed in a mounting posture in which the axes of the first blade groove 47 and the second blade groove 48 form a predetermined angle θ with respect to the vertical line, respectively. The blade 45 and the second blade 46 are configured to be inclined and reciprocate.
In addition, the first blade 45 and the second blade 46 are both caused by the elastic force of the compression springs 51 and 52.
6, it is urged toward the center of the second cylinder 37.

In this embodiment, the first blade 45 and the second blade 45
Of the blades 46, the first blade 45 on the auxiliary bearing 40 side
Also serves as a fuel pump. That is, the main bearing 39 and the sub bearing 40 on which the crankshaft 35 slides
The oil supply pipe 53 for supplying the oil for lubricating the inner peripheral surface of the first blade 45, the second blade 46, the first roller 42, the sliding surface with the second roller 44, and the like is provided in the first blade chamber 49.
And the shaft end of the crankshaft 35 are connected. In this case, an oil passage (not shown) opening from the shaft end of the crankshaft 35 to each sliding surface is formed, and the oil is supplied through this oil passage. 2 and 3, the reference numeral 53a is an oil injection port of the oil supply pipe 53, and is formed at a position where it is immersed in oil, as shown in FIG.

On the other hand, the first cylinder 36 and the second cylinder 3
An oil supply path 54 is formed in the partition plate 38 between the first and second blade chambers 49.
And the second blade chamber 50 communicate with each other.

Here, FIG. 5 to FIG. 6 show the second cylinder 3
7 is a diagram showing a positional relationship among a second blade groove 48 formed in No. 7, a second blade chamber 50, and an oil supply passage 54. FIG. Of these, in FIG. 5, the second cylinder 37 is divided into the partition plate 3
FIG. 6 is a side view of the second cylinder 37 as viewed from the side of FIG. As is apparent from FIGS. 5 and 6, the oil supply passage 54 has an outlet portion 54b that opens toward the second blade chamber 50 side as compared with an inlet portion 54a that opens toward the first blade chamber side 49. The diameter is getting smaller. Then, the outlet portion 54b of the oil supply passage 54 as described above is
The blade chamber 50 is opened in a hatched area so as to face the second blade groove 48 above the blade chamber 50.

In the above structure, first, the first blade 45 and the second blade 46 reciprocate as the crankshaft 35 rotates during operation of the compressor. As a result, the volume of the cylinder chambers inside the first cylinder 36 and the second cylinder 37 changes periodically to compress the refrigerant gas. Further, with respect to the first blade 45, the oil accumulated at the bottom of the closed casing 30 when sucked up is sucked into the first blade chamber 49 through the suction port 53a,
When the blade 45 descends, the oil in the first blade chamber 49 is pushed out, passes through the oil supply pipe 53, and is supplied to each sliding portion of the compression unit 32.

Further, in addition to the replenishment through the oil supply pipe 53, a portion where the replenishment from the oil supply pipe 53 is insufficient, that is, for the second blade 46, the oil extruded by the first blade 45 is the partition plate. The oil is sufficiently replenished from the clearance between the outlet 54b of the oil supply passage 54 of 38 and the second blade 46 in contact with the intermediate partition plate 38. This replenishment is sufficiently performed by the pumping action of the first blade 45 even when the oil level is low. In addition, the outlet portion 54b of the oil supply path 54 of the partition plate 38 is connected to the second blade chamber 5
Since it is open to the second blade groove 48 which is above 0, the first blade chamber 49 and the second blade chamber 50
Since the second blade 46 does not always communicate with each other, the efficiency of the first blade 45 as an oil supply pump does not decrease.

Next, another embodiment of the present invention will be described with reference to FIGS. 7 and 8 by assigning the same numerals to the same components as those in the first embodiment. In this embodiment, the partition plate 3
In addition to supplying oil to the second blade 46 through the oil supply passage 54, the sliding surfaces of the rollers 42 and 44, the first cylinder 36, and the second cylinder 37 are also supplied.
That is, the outlet portion 54b of the oil supply path 54, which serves as an oil supply port for the second blade 46, is open to the second blade groove 48, as in the above-described first embodiment, but at the center. The oil passage 61, which opens into the shaft hole 60 of the partition plate 38 through which the crankshaft 35 is inserted, is configured to branch off from the middle of the oil supply passage 54. The reference numeral 62 is directly
The drawing shows a suction passage for sucking oil from the oil sump, and the suction passage 62 is provided at a position lower than the oil supply passage 54. Therefore, as the first blade 45 reciprocates, oil is supplied to the second blade 46, and at the same time, the sliding surface of the compression element, which requires lubricating oil, is sufficiently supplied from the oil passage 61. In particular, as shown in FIG. 7, when the suction passage 62 is provided, stable oil supply becomes possible even if the oil level becomes low.

[0017]

As is apparent from the above description, according to the present invention, the oil supply passage for guiding the oil from the blade chamber of the first cylinder to the second cylinder is formed, and the outlet portion of the oil supply passage is formed. Since it is configured to open so as to face the blade groove of the second cylinder, the efficiency of the blade as an oil supply pump is not reduced, and even if the oil level is low, it is not used as a pump. It is possible to supply sufficient oil to the blade on the side and improve reliability.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a horizontal rotary compressor according to the present invention.

FIG. 2 is a vertical cross-sectional view showing a main part of a compression element.

FIG. 3 is a sectional view showing the compression element from the side of the auxiliary bearing.

FIG. 4 is a side view of the cylinder of the compression element.

FIG. 5 is an explanatory diagram showing a relationship between an inlet side and an outlet side of an oil supply passage and a cylinder.

FIG. 6 is an explanatory view showing a position where an outlet of the oil supply passage is provided.

FIG. 7 is a front view of a partition plate in which an oil supply passage is formed according to another embodiment of the present invention.

FIG. 8 is a sectional view of a partition plate in which an oil supply path is formed in another embodiment according to the present invention.

FIG. 9 is a vertical cross-sectional view of a conventional horizontal rotary compressor in which a blade doubles as an oil supply pump.

[Explanation of symbols]

 30 Airtight casing 31 Electric motor part 32 Compressor part 33 Stator 34 Rotor 35 Crankshaft 36 First cylinder 37 Second cylinder 38 Partition plate 39 Main bearing 40 Sub bearing 45 First blade 46 Second blade 47 First blade chamber 48 Second blade Chamber 53 Oil supply pipe 54 Oil supply passage 54b Oil supply passage outlet

Claims (1)

[Claims] 1. A compression element and an electric element are connected by a crankshaft in a hermetic casing, and a first cylinder and a second cylinder constituting the compression element are connected in series via a partition plate, and the first and second cylinders are connected to each other. A horizontal rotary compressor using one of the first blade and the second blade housed in the first cylinder and the second cylinder as a pump for supplying lubricating oil to the sliding surface of the compression element. And forming an oil supply path for guiding oil from the blade chamber of the first cylinder to the second cylinder, and opening an outlet portion of the oil supply path so as to face the blade groove of the second cylinder. Horizontal type rotary compressor.