JPH053754Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a horizontal rotary compressor that is incorporated into a refrigerator or the like, and particularly relates to a horizontal rotary compressor with an improved oil supply mechanism and increased reliability.

[Technical background of the invention]

Conventionally, the oil supply mechanism of a horizontal rotary compressor has a through hole formed in the axis of the rotating shaft, and lubricating oil is supplied into this through hole from an opening at one end on the compression element side, communicating with the through hole. Each sliding portion is supplied with oil through the provided oil supply holes, and excess lubricating oil is discharged from the opening at the other end on the electric element side.

[Problems with background technology]

However, in the conventional oil supply mechanism, the lubricating oil discharged from the other end opening passes through a minute gap between the electric element and the casing before reaching the oil supply pump means provided on the compression mechanism side. It took a considerable amount of time, and the oil level in the oil pump means decreased, reducing the amount of oil supplied, and there was a fear that sufficient oil could not be supplied.

[Purpose of invention]

The object of the present invention is to improve the above-mentioned conventional problems, prevent the oil level from decreasing in the oil supply pump means, and provide a highly reliable horizontal compressor that always provides appropriate oil supply.

[Structure of the invention] The present invention provides a horizontal rotary compressor in which an electric element and a compression element are housed with a rotating shaft horizontally in a casing with an oil reservoir formed at the bottom. Form an oil hole in the
An oil supply passage means for supplying lubricating oil into the oil hole is supported by a support member fixed to a compression element, and excess lubricant oil in the oil hole is supplied to at least one of the oil supply passage means and the support member facing the oil hole. An oil discharge passage is formed to discharge oil into a space formed between the compression element and an end surface of the casing on the side opposite to the electric element, and an oil suction hole of the oil supply pump means is provided so as to open into an oil reservoir in the space. It is something that

[Function] As the horizontal rotary compressor operates, the lubricating oil sucked from the oil suction hole of the oil supply pump means is pressurized by the oil supply pump means, and is supplied into the oil hole of the rotating shaft through the oil supply passage means. Ru. Lubricating oil in the oil hole is supplied to each sliding portion of the compression element. The surplus lubricating oil in the oil hole is discharged through the oil discharge passage into the space formed between the compression element and the end face of the casing on the side opposite to the electric element, and the oil sump in which the oil suction hole of the oil supply pump means opens. will be returned directly to

[Example of idea]

Next, a horizontal rotary compressor according to an embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, an electric element 2 and a compression element 3 are housed in a casing 1 with a rotating shaft 4 horizontally arranged, and an oil reservoir 5 is formed at the bottom of the casing 1. The electric element 2 is composed of a stator 2a fixed to the inner wall of the casing 1 and a rotor 2b fixed to the rotating shaft 4.
A notch 2c is formed in the stator so that the oil reservoirs 5 on both sides of the stator communicate with each other. On the other hand, the compression element 3 forms a cylinder chamber 6a with a main bearing 7 and a sub-bearing 8 that cover both end faces of the cylinder 6 and pivotally support the rotating shaft 4. Further, an eccentric portion 4a of the rotary shaft 4 is located in the cylinder chamber 6a and is provided to pass through the cylinder chamber 6a, and a roller 9 is fitted into the eccentric portion 4a. Furthermore, a blade 1 is provided in the groove formed in the radial direction of the cylinder 6.
The blade 10 is provided so as to be reciprocally movable, and the tip of the blade 10 is always brought into contact with the outer peripheral surface of the roller 9 eccentrically rotating within the cylinder chamber 6a by means of a spring 11. As shown in an enlarged view in FIG. 2, a blade chamber 12 is hermetically formed behind the blade 10, and the oil supply pump 1
3 are made up. That is, a through hole 12a is bored in this blade chamber 12, and an oil supply pipe 14 serving as an oil supply passage means is inserted into this through hole 12a.
is connected at one end. And this oil supply pipe 1
4 is formed with an opening 14a that communicates with the lubricating oil in the oil reservoir 5 at the bottom of the casing 1 at a position close to the through hole 12a. That is, the opening 14a, which is the oil suction hole of the oil supply pump, is provided to open into the oil reservoir 5 in the space formed between the cylinder 6 of the compression element 3 and the end face of the casing 1 on the side opposite to the electric element. .

The other end of the oil supply pipe 14 is supported by a support member 15 fixed to the auxiliary bearing 8 of the compression element 3, and is connected to an oil hole 4b formed in the shaft core of the rotation shaft 4 on the compression element 3 side. They are placed facing each other. moreover,
The rotary shaft 4 has oil supply holes 4c, 4d, 4 that communicate with the oil hole 4b and supply lubricating oil to each sliding part.
e is formed. The support member 15 has a substantially cap shape as shown in FIGS. 3 and 4, and supports 15a and 15a are formed in the center of the support member 15 to support the oil supply pipe 14. a notch 15b forming an oil discharge passage;
15b is formed. Although not shown in the drawings, the cylinder 6 is formed with communication passages that communicate oil reservoirs on both sides thereof.

Next, the operation of the present invention will be explained. By energizing the electric element 2, the rotor 2b and the rotating shaft 4 rotate together. Accordingly, the roller 9 fitted into the eccentric portion 4a of the rotating shaft 4 rotates eccentrically within the cylinder chamber 6a, thereby performing a well-known compression action.

On the other hand, due to the eccentric rotation of the roller 9, the roller 9
The blade 10 that is in contact with the outer circumferential surface of the oil reciprocatingly moves to perform a lubricating action. That is, when the blade 10 moves in the direction of expanding the volume of the blade chamber 12 (in the solid line direction in FIG. 2), the lubricating oil in the oil reservoir 5 passes through the opening 14a of the oil supply pipe 14 as shown by the solid line in FIG. is sucked into the blade chamber 12 through the through hole 12a. Next, when the blade 10 moves in the direction of reducing the volume inside the blade chamber 12 (in the direction of the broken line in FIG. 2), the blade chamber 12 moves as shown by the broken line in FIG.
The lubricating oil in 2 flows from the through hole 12a to the oil supply pipe 14.
is discharged. At this time, the flow rate of the lubricating oil passing through the oil supply pipe 14 causes an ejector action (suction action) in the opening 14a, and the lubricating oil in the oil reservoir 5 is sucked into the oil supply pipe 14 through the opening 14a. The lubricating oil, which is transferred together with the lubricating oil discharged from the blade chamber 12 and supplied through the oil supply pipe 14, is introduced into the oil hole 4b, and is further transferred to the rotating shaft 4.
The centrifugal force caused by the rotation of the oil supply holes 4c, 4d,
Each sliding part is supplied with oil via 4e. Further, the remaining lubricating oil is removed from the support member 15 of the oil supply pipe 14.
The oil is discharged into the space formed between the cylinder 6 of the compression element 3 and the end face of the casing 1 on the side opposite to the electric element through the notches 15b, 15b formed in the oil sump 5 in this space, that is, the oil supply. The oil directly returns to the oil sump 5 where the opening 14a, which is the oil suction hole of the pump, is provided. Therefore, there is no abnormal drop in the oil level in the oil reservoir 5 in which the opening 14a, which is the oil suction hole of the oil supply pump, is provided, and sufficient oil can be supplied at all times, thereby improving reliability. In addition, since a drop in the oil level can be prevented, the amount of lubricating oil can be reduced compared to conventional methods, reducing costs. At the same time, the oil level on the electric element 2 side is lower than conventional ones, and the rotor It is possible to reduce or prevent stirring of the lubricating oil by 2b, and improve the operating efficiency of the compressor.

In the above embodiment, the oil discharge passage was constructed by the notches 15b formed in the support member 15, but as shown in FIG. The oil discharge passage may be formed by forming an oil discharge passage, and in short, it may be formed in an arbitrary shape on at least one of the support member 15 and the oil supply pipe (oil supply passage means) 14 facing the oil hole 4b of the rotating shaft 4. In addition, the lubricating oil in the oil hole 4b is absorbed by the centrifugal force caused by the rotation of the rotating shaft 4.
The inner circumferential surface of the slider is pressed, and each sliding part is supplied with oil from oil supply holes 4c, 4d, and 4e provided in communication with this inner circumferential surface. It is preferable that the passage be provided closer to the axis than the inner peripheral surface of the oil hole 4b. Furthermore, although the present invention has been described as being applied to a refueling pump that utilizes the reciprocating motion of blades, the present invention is not limited thereto, and can be applied to any refueling pump such as one that utilizes the flow rate of discharged gas.

[Effect of idea]

As explained above, the present invention forms an oil hole in the shaft core on the compression element side of the rotary shaft, and provides oil to at least one of the oil supply passage means for supplying lubricating oil into the oil hole and the support member of the oil supply passage means. An oil discharge passage is formed to discharge excess lubricating oil in the hole into a space formed between the compression element and the end face of the casing on the side opposite to the electric element, and an oil suction hole of the oil supply pump means is connected to the oil in the space. Since it is opened to the reservoir, the oil suction hole of the oil supply pump means is opened and the oil level in the oil reservoir in the space provided is prevented from dropping, and sufficient oil can always be supplied, resulting in high reliability. You can get a horizontal rotary compressor. Furthermore, the amount of lubricating oil can be reduced compared to the conventional method, thereby reducing costs and improving motion efficiency.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a horizontal rotary compressor according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the main part of FIG. 1, FIG. 3 is a longitudinal sectional view of a supporting member, and
The figure shows a side view of the support member, and FIG. 5 shows a side view of the main part of a fuel supply pipe according to another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Casing, 2... Electric element, 3... Compression element, 4... Rotating shaft, 4b... Oil hole, 5... Oil reservoir, 14... Oil supply pipe (oil supply passage means), 15...
Support member, 15b...notch (oil release passage).

Claims (1)

[Scope of utility model registration request] In a horizontal rotary compressor in which an electric element and a compression element are housed with a rotating shaft horizontally in a casing with an oil reservoir formed at the bottom, an oil hole is formed in the core of the rotating shaft on the compression element side, and the oil hole is formed in the core of the rotating shaft on the compression element side. An oil supply passage means for supplying lubricating oil into the hole is supported by a support member fixed to a compression element, and excess lubricant oil in the oil hole is compressed to at least one of the oil supply passage means and the support member facing the oil hole. An oil discharge passage is formed in a space formed between the element and the end face of the casing on the side opposite to the electric element, and an oil suction hole of the oil supply pump means is provided to open into the oil reservoir in the space. A horizontal rotary compressor featuring: