JPS60204994A - Horizontal type rotary compressor - Google Patents

Abstract

PURPOSE:To permit lubricating oil to be efficiently supplied into a bearing part by utilizing the blade part of a compression apparatus as oil pump and allowing a coil spring extended and contracted by the urging of the blade to operate as valve mechanism and eliminating the necessity of a check valve. CONSTITUTION:When a blade 26 is moved in reciprocation by the eccentric revolution movement of a rotor 19, the blade part 26 carries-out oil feeding operation as the oil pump of an oil feeding apparatus 50. Therefore, when the blade 26 operates in the direction (upward) for increasing the capacity of a blade chamber 31, the lubricating oil stored in the inner bottom part of a casing 12 is inhaled into the blade chamber 31 through the gap of a coil spring 32 extending from a suction port 29. When the blade 26 moves downward, the coil spring 32 is contracted, and the lubricating-oil stored in the peripheral side part 42 is discharged from an oil discharge port 43 and supplied into the rotary shaft 15 of a compression apparatus 14 and a bearing 44, and sufficient oil feeding operation is permitted. In this case, the oil spring 32 performs the function of a check valve, and the necessity of a check valve in the conventional method can be eliminated.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a horizontal rotary compressor used in a refrigeration cycle, and in particular to a horizontal rotary compressor that uses the reciprocating blade section of the compressor as an oil pump and that is attached to the compressor. This invention relates to a horizontal rotary compressor equipped with an oil supply device in which a biasing coil spring functions as a valve mechanism.

[Technical background of the invention and its problems] Generally, as an oil supply device for a horizontal rotary compressor,
A device that utilizes the blade portion of the compression device is known. This oil supply device divides the cylinder chamber of the compression device into a high-pressure chamber and an ff chamber, and uses the blade, which reciprocates with the eccentric rotation of the rotor, as the piston of the oil pump. A blade chamber for housing the blade is formed in a sealed manner on the rear end side, an oil inlet and an oil outlet are provided in this blade chamber, and the oil outlet and the bearing part of the compression device are connected to the oil feed pipe e. It is. In other words,
When the blade is moved in the direction of expanding the volume inside the blade chamber due to the reciprocating motion of the blade due to the eccentric rotational movement of the rotor, lubricating oil is sucked from the oil suction port, and the blade reduces the volume inside the blade chamber. The lubricating oil sucked in when the compressor is moved in the direction is discharged from the oil discharge port and supplied to the bearing portion of the compression device through the oil feed pipe. However, in the conventional oil supply device having such a configuration, a check valve is required at the oil inlet and the oil outlet, resulting in a problem that the structure becomes complicated and the cost increases.

In addition, as a way to improve the above problems, the conventional I'T9
A refueling device 1 as shown in the figure has been proposed.

This oil supply device 1 has only a through hole 3 for sucking and discharging lubricating oil formed in a blade chamber 2, and an oil feed pipe 4 is provided connecting this through hole 3 and a bearing part (not shown) of a compression device. An opening 6 is formed in the middle of the oil pipe 4 at a position close to the through hole 3 and facing the bottom of the casing 5-. That is, when the blade 7 of the compression device moves in the direction of expanding the volume of the blade chamber 2, a portion of the lubricating oil in the oil feed pipe 4 and the opening 6 of the oil feed pipe 4 leak into the casing 5, as shown by the solid line. The full lubricating oil at the inner bottom is sucked into the blade chamber 2 through the through hole 3, and when the blade 7 moves in a direction to reduce the volume of the blade chamber 2, the sucked lubricating oil penetrates as shown by the broken line. The oil is discharged from the hole 3 and supplied to the bearing section of the compression device through the oil feed pipe 4. During the above-mentioned discharge, the flow rate of the lubricating oil flowing inside the oil pipe 4 causes an ejector action (suction action) on the opening 6, and the lubricating oil at the inner bottom of the casing 5 is further sucked into the oil pipe 4. 14 discharged from the blade chamber 2
The oil is sent to the bearing part along with the lubricating oil. Therefore, efficient oil supply operation can be achieved without providing any complicated check valve mechanism.

However, with this proposal, there is a problem that if the curved surface of the lubricating oil is lower than the opening 6 of the oil feed pipe 4, it may not be possible to supply oil, and that the processability of forming the opening 6 in the oil feed pipe 4 is poor. It had

[Object of the Invention] The present invention has been devised in view of the above problems and to effectively solve them.

An object of the present invention is to utilize the blades of a compression device reciprocated by a rotor as an oil pump, and to make a coil spring that is expanded and contracted by urging the blades function as a valve mechanism. To provide a horizontal rotary compressor equipped with an oil supply device capable of efficiently supplying lubricating oil to a bearing part of a compression device without providing a check valve am and without being affected by a drop in oil level.

[Summary of the Invention 1] The present invention provides a horizontal rotary compressor in which a rotating shaft of a compression device is horizontally disposed in a casing in which lubricating oil is stored at the bottom, and a rotor that is eccentrically rotated by the rotating shaft; A blade positioned below the rotor and reciprocated with its tip in contact with the rotor, a blade chamber sealed and formed on the rear end side to accommodate the blade, and a blade chamber provided within the blade chamber. an oil inlet formed on the lower wall of the blade chamber facing the inner side of the fill spring, and an oil inlet formed on the circumferential side of the coil spring. A horizontal rotary compressor comprising an oil supply device comprising an oil discharge port formed in the side wall of the blade chamber facing the blade chamber, and an oil supply passage that guides the lubricating oil discharged from the core oil discharge port to the bearing portion of the rotating shaft. The above objective is achieved by configuring the following.

[Embodiments of the Invention] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a schematic side cross section of a horizontal rotary compressor of the present invention. As shown in the figure, the horizontal rotary compressor 11 has an electric device 5113 and a compression device 14 disposed in a casing 12 with their rotating shafts 15 horizontal, and lubricating oil is stored at the bottom of the casing 12. The electric device 113 includes a stator 16 fixed to the inner wall of the casing 12 and a rotor 1 fixed to one end of the rotating shaft 15.
It consists of 7.

As shown in FIGS. 1 and 2, an eccentric shaft portion 18 is formed at the other end of the rotating shaft 15, and the compression device 14 is provided thereon. The compression device 14 is composed of the rotating shaft 15, a rotor 19 that is fitted onto the eccentric shaft portion 18 and rotates eccentrically, and a compression chamber 20 formed around the rotor 19.

The compression chamber 20 is a cylinder 2 that covers the outer peripheral side of the rotor 19 and in which the rotor 19 rolls in sliding contact with the inner wall 21 of the cylinder 2.
2, and the rotating shaft 1 covers the end faces on both sides of the cylinder 22.
The main bearing 23 is formed of a main bearing 23 that pivotally supports the N1 bearing 5 and an N1 bearing 24, and the main bearing 23 is fixed to the inner wall of the casing 12.

A groove 25 is formed in the lower part of the cylinder 22 located below the rotor 19, and a blade 26 is provided in the groove 25 so as to be able to slide in the groove and reciprocate in the radial direction. This blade 26 is provided so that its tip 27 is always in contact with the rotor 19, and is reciprocated in accordance with the eccentric rotation of the rotor 19, and the compression chamber 20
It is provided to divide into a high pressure chamber 28 and a low pressure chamber 29.

Further, a blade chamber 31 is provided on the rear end 30 side of the blade 26 to accommodate the blade 26 that is reciprocated. This blade chamber 31 is formed integrally with the cylinder 22 and is sealed by a main bearing 23 and a sub-bearing 24.

The tip 27 of the blade 26 is located inside the blade chamber 31.
A coil spring 32 is provided which urges the cylindrical member 19 to be in constant pressure contact with the 〇-〇 19. This coil spring 3
2 is a rear end surface 33 of the blade 26 as shown in FIG.
It is inserted into the blade chamber 31 through an insertion hole 35 formed in the lower mold 34 of the blade chamber 31 facing the blade chamber 31, and one end 36
The free end contacts the rear end surface 33 of the blade 26 to urge the blade 26, and the other end 37 serves as a fixed end and is locked to the insertion hole 35 of the lower wall 34 via a stopper 38a.

By the way, a feature of the present invention is that the blade portion of the compression device 14 configured as described above is used as an oil pump of the oil supply device 50, and the coil spring 3
2 is configured to function as a valve mechanism.

As shown in FIG. 3, the lower wall 34 of the blade chamber 31 is provided with an oil inlet 39 for sucking lubricating oil stored in the inner bottom of the casing 12 into the blade chamber 31.

As shown in the figure, the oil suction port 39 is formed in a stopper 38a that locks the coil spring 32 in the insertion hole 35, and is provided facing the inner side 40 of the coil spring 32.

On the other hand, an oil discharge port 43 is provided in the side wall 41 of the blade chamber 31 facing the circumferential side portion 42 of the coil spring 32 for discharging the lubricating oil sucked into the blade chamber 31 . In the illustrated example, the oil discharge port 43 is located on the side wall 41 of the blade chamber 31.
The auxiliary bearing 24 forms a And the first
As shown in the drawings and FIG. 3, an oil feed pipe 45a is connected to the oil discharge port 43 and forms an oil feed passage 45 by connecting the oil discharge port 43 to the bearing portion 44 of the rotating shaft 15 of the compression device f14.

The lubricating oil discharged from the oil discharge port 43 is delivered to the oil passage 4.
5 and is guided to the bearing part 44. In addition, the oil passage 45 is connected to the sub bearing 24 and the main bearing 23.
It may also be formed by perforating it.

In other words, horizontal rotary compressor + J11 oil supply device 50
The blade 26 of the compression device 14 is used as an oil pump, and the oil suction port 39 is connected to the oil spring 32.
The oil field outlet 43 is located facing the inner part 40 of the
By providing the fill spring 32 facing the circumferential side 42 of the coil spring 32, the fill spring 32 is made to function as a check valve by utilizing the change in pitch between the lines as the coil spring 32 expands and contracts. It consists of

Next, the operation of the present invention will be explained.

When the rotating shaft 15 is driven by energizing the JI device 13, the compressor 19 of the compressor 114 fitted to the eccentric shaft portion 18 of the rotating shaft 15 is eccentrically rotated, and the horizontal rotary compressor 11 is rotated eccentrically. performs a compression action.

On the other hand, when the blade 26 is reciprocated due to the eccentric rotational movement of the rotor 19, the blade 26 is moved to the oil supply device 50.
Performs oil supply function as an oil pump. That is, as shown by the two-dot chain line in FIG.
When the lubricating oil stored in the inner bottom of the casing 12 is moved in the direction of enlarging the volume of the blade chamber 31 (upward), the lubricating oil stored in the inner bottom of the casing 12 is sucked into the blade chamber 31 from the oil suction port 39 . At this time, the lubricating oil flows into the inner part 40 of the coil spring 32, but the coil spring 32 expands as the blade 26 rises.
As shown by the two-dot chain line, the pitch S1 between the coil springs 32 increases. For this reason, the lubricating oil sucked into the coil spring 32 does not flow into the coil spring 32, but instead fills the blade chamber 31 through the lines.

When the blade 26 moves in a direction to reduce the volume of the blade chamber 31 (downward), the coil spring 32 is contracted as the blade 26 descends, and the line pitch S2 becomes smaller as shown by the solid line. Become. Therefore, the lubricating oil that has filled the blade chamber 31 and has accumulated on the circumferential side 42 of the coil spring 32 is obstructed from flowing toward the inner side 40 and is easily discharged from the oil outlet 43. It will perform the function of a check valve.

In addition, the lubricating oil discharged from the oil discharge port 43 is transferred to the oil supply pipe 45.
The compressed air is guided to the rotating shaft 15 of the compression device 14 and the bearing portion 44 thereof.

As a result of experimenting with the oil supply device 50 configured in this way, it was found that the normal motor rotation speed (3,000 to 3,500 rpm)
150 to 300 cc#+1nP to the bearing part 44
i! It was confirmed that the oil amount of 11F can be supplied. This pump efficiency is worth 30% of the calculated result, and the remaining 70%
Although this means that the oil escaped to the suction side, enough oil was supplied without interfering with the lubrication of the compression device ff14.

Also, the oil inlet 39 is connected to the cylinder 22 as shown in FIG.
The lubricating oil is provided on the lower wall 34 of the blade chamber 31, which is the largest protruding part, and is located closest to the bottom of the casing 12, so even if the lubricating oil decreases and the oil level drops, stable lubrication characteristics can be maintained. I can carry it with me.

Furthermore, in order to cause the coil spring 32 that biases the blade 26 of the compression device 1f14 to function as a check valve,
Even if the blade 26 is used as an oil pump of the oil supply device 150, there is no need to provide any complicated check valve mechanism thereto.

In addition, as shown in FIGS. 4 to 6, the stops 38b, 38c, and 38d of the coil spring 2 are formed into a funnel shape or the like to form a so-called fluid diode that facilitates the flow of 8 ml clean oil in only one direction. If the coil spring 32 functions as a
It is easy to locate the center of the coil spring 32.
Since there is no contact between the coil spring 32 and the inner wall of the insertion hole 35, wear and noise generation can be prevented, and the coil spring 32 can maintain normal operation. Furthermore, this stopper 38a.

If the elastic bodies 38b, 38c, and 38d are formed with press-fit dimensions such that b<-s, not only can the coil spring 32 be installed with one touch, but also the coil spring 32 can be removed easily.
1, and improves ease of assembly. The example shown in FIGS. 5 and 6 is a stop shell 38G.

The circumferential side of the large diameter portion 46 of 38d is engaged with the inner circumferential wall 48 of the stepped portion 47 formed in the insertion hole 35.

In addition, as shown in FIGS. 3 to 6, the third toe fitting 38
The ends 37 of the coil springs 32 are brought into contact with the peripheral edges of the oil suction ports 39 of a, 38b, 38c, and 38d.
Even if the large diameter portions 46 of the stoppers 38e and 38f are formed in the shape of claws 49 as shown in FIGS. 7 and 8, the coil spring 3
There is no problem in making 2 function as a check valve.

[Effects of the Invention] In summary, the present invention provides the following excellent effects.

(1) The blade section of the compressor is used as an oil pump in the oil supply system of the horizontal rotary compressor, and the oil suction port is provided facing the inside of the oil spring that biases the blade, and the oil discharge port is provided. Since the coil spring is provided so as to face the circumferential side of the coil spring, the coil spring can function as a check valve.

(2) Therefore, there is no need to provide a particularly complicated check valve mechanism in the blade portion of the compression device used as an oil pump, and the number of parts can be reduced, thereby reducing manufacturing costs.

C3) Furthermore, since the oil inlet is provided in the blade section, which is the largest protruding part of the cylinder, and is located closest to the bottom of the casing, the f/l lubricating oil decreases and the oil level drops. Stable lubrication characteristics can be maintained even at low temperatures.

(4) High reliability as there are no extra moving parts inside the cylinder.

[Brief explanation of the drawing]

Fig. 1 is a schematic side sectional view showing a preferred embodiment of the horizontal rotary compressor of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is an enlarged view of the main part of Fig. 1. Cross-sectional view, Figure 4~
Figure 6 is number 31! 1 shows a modification of the stopper shown in FIG. FIG. In the figure, 1.50 is the oil supply device, 5.12 is the casing, 1
1 is a horizontal rotary compressor, 14 is a compression device, 15
is a rotating shaft, 19 is a rotor, 26 is a blade, 27 is a tip of a blade, 30 is a rear end of a blade, 31 is a blade chamber, 32 is a coil spring, 34 is a lower wall of the blade chamber, 39 is an oil inlet, 40 is the inner part of the coil spring,
4H is a side wall of the blade chamber, 42 is a peripheral side of a coil spring, 43 is an oil discharge port, 44 is a bearing portion of a rotating shaft, and 45 is an oil feed passage. Agent: Patent Attorney Noriyuki Chika (1 other person) Figure 1 ■ Figure 2 Figure 3 Figure 6 Figure 4 6

Claims (1)

[Claims] In a horizontal rotary compressor in which a rotating shaft of a compressor is horizontally arranged in a casing in which oil is stored, a rotor is eccentrically rotated by the rotating shaft, and a rotor is located below the rotor. a blade whose tip is brought into contact with the rotor and is reciprocated; a blade chamber formed in a sealed manner on the rear end side to accommodate the blade; an oil inlet formed in the lower wall of the blade chamber facing the inner side of the coil spring; and a side wall of the blade chamber facing the circumferential side of the coil spring; 1. A horizontal rotary compressor comprising: an oil supply device comprising an oil discharge port formed in the core oil discharge port; and an oil supply passage that guides lubricating oil discharged from the core oil discharge port to a bearing portion of the rotating shaft.