JPH01227889A - Lubricating oil supply device of rolling piston type compressor - Google Patents

Abstract

PURPOSE:To prevent distortion from being produced on a bearing flange by interposing a sealing board which makes sliding contact with the end face of a rolling piston between a cylinder and bearings placed on both sides thereof and forming a lubricating oil supply passage between the sealing board and each of these bearings. CONSTITUTION:Oil supply grooves 7c and 8c radially extending to a middle are formed on the flange parts of bearings 7 and 8 facing to the opposing side faces of a cylinder 5. A shield board 13 is placed between the cylinder and each of the bearings 7 and 8 and a through-hole 13c which makes direct communication with the lubricating oil suction hole 12 formed at one end of the cylinder 5 and with both the oil supply grooves 7c and 8c. In such constitution the need for both the formation of oil supplying through-holes drilled on the flange parts 7 and 8 and the press-fit of oil supply pipe into the through-holes is eliminated, whereby preventing distortion from being generated on the flange face.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a lubricating oil supply device for a rolling piston compressor, and particularly to an improvement in a lubricating oil supply passage.

[Conventional technology]

FIG. 6 is a vertical sectional view of a compressor showing a conventional lubricating oil supply system disclosed in Japanese Utility Model Application Publication No. 80-523116.
In the figure, (11 is a closed container, (2) is a compression element housed and rotated therein, and this compression element is driven by an electric element (3). A rolling piston (6) that is fitted into the cylinder (5) and rotates completely eccentrically within the cylinder (5);
Both end surfaces (5b) of 51, the main bearing (7) and end bearing (8) which close the 51 and support the crankshaft (4), reciprocate while contacting the outer periphery of the rolling piston (6). It moves and partitions the inside of the cylinder (5) into a high-pressure space and a low-pressure space.
5a) is provided in the cylinder (5).

A refrigerant suction port into which a suction pipe (9) is inserted.

Furthermore, (11 (lυ) are the main bearing (7) and the end bearing (
Through holes (7a) and (8a) provided in the flange part of 8)
) is a refueling pipe that is press-fitted into a sealed container (1
) are immersed in the lubricating oil inside the bearings (
71, (8) and the inner circumferential space (6a) K of the rolling piston (6).

[Problem to be solved by the invention]

Since the conventional lubricating oil supply device is configured as described above, in addition to drilling small diameter and long through holes (7a) and (8a) in the flange part of each bearing (71, +81), the oil supply pipe GO , αD, and the flange surface in contact with the cylinder end face (5b) of each bearing tends to be distorted, resulting in problems such as poor sealing performance.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, it is an object of the present invention to eliminate the work of drilling elongated through holes in each bearing and the work of press-fitting oil supply pipes into these through holes.

[Means to solve the problem]

In the case of this invention, a sealing plate that slides into contact with the ends of the rolling piston is inserted between the cylinder and each bearing on both sides of the cylinder, and a suction lubricating oil supply passage is formed between these sealing plates and each bearing. I'm letting you do it.

[Effect]

Since the lubricating oil supply passage in this invention is formed between each bearing and the sealing plate, there is no need for drilling a long and narrow through hole into each bearing or press-fitting an oil supply pipe that involves distortion.

〔Example〕

An embodiment of the present invention will be described below.

That is, in FIG. 1, the same or corresponding parts as in the conventional one shown in FIG. A suction hole for the lubricant is provided in the core of the cylinder (1), which is immersed in the lubricant in the airtight container (1). The flange portions of the bearing (7) and the end bearing (8) each have a solid bearing hole (7kl) on one end surface side of the cylinder, and (Bb)K communicate with each other in the radial direction, as shown in Fig. 2. The oil supply grooves (7c) and (80) extending halfway are recessed, and each of these oil supply grooves (7c),
(8 is formed at the same time when molding each bearing +71. +81. Furthermore, αj is inserted between the cylinder (5) and each bearing (71, (8), with a shield plate that slides into contact with.

As shown in Figure 3, each bearing (71, +8) is tightened through the port α41'i through-hole (1, 3a), the crankshaft (4) through-hole (15b), and the above. A through hole (1) connecting the suction hole Q2 and each oil supply groove (7,
It has three characteristics.

That is, in the assembled state of each shield plate α3, the above-mentioned suction hole +13. Through hole (13) and oil supply groove (7).

(8C) is connected to each bearing (71, 18) + 2)
Bearing hole (7b).

(8b) and a lubricating oil supply passage to the inner peripheral space (6a) of the rolling piston (6).

In the above embodiment, the oil supply grooves forming a part of the lubricant supply passage were formed on the bearings (71, (81) side.
3d), as shown in another embodiment of FIG. 4, a series of through holes (13) may be provided in each shield plate a3 at the same time when the shield plates a30 are molded.

Furthermore, FIG. 5 shows an extension L that is immersed in the lubricating oil in the sealed container +11 in a part of each shield plate α3 in its assembled state.
This is still another embodiment in which a lubricating oil suction hole a'at- is provided in the cylinder (5), and a suction hole a'at- for the lubricating oil supply passage is opened at the tip of the cylinder (5). , and others are used built-in like the first prisoner.

〔Effect of the invention〕

Since the lubricating oil supply device of the present invention is configured as described above, the lubricating oil supply device of the present invention is provided with respect to each bearing. This eliminates the need for time-consuming machining of small-diameter, long drill holes and the press-fitting of oil supply pipes into each of these drill holes, thereby completely eliminating strain on the flange surface of the valley bearing that is in contact with one end of the cylinder. This has the effect of eliminating this problem and reducing processing costs.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing an embodiment of the oil supply device for a rolling piston compressor according to the present invention, and FIG.
) (C1 is a front view, sectional view, and rear view showing the bearing used in the device of this invention, and (a) in FIG. 3 (bl is a front view showing the shield plate used in the device of this invention) and cross-sectional views, (a) (bl in Fig. 4 and (a) (bl) in Fig. 5)
b) is a front view and a cross-sectional view showing other embodiments of the shield plate, and FIG. 6 is a vertical cross-sectional view showing a lubricating oil supply device 1111 of a conventional rolling piston compressor. In addition, in the figure 111t'j closed container, (41 is the crankshaft,
(5) Cylinder, (5a) H end, (6) rolling piston, (6a) inner space, (7) main bearing, (8) end bearing. (7b), (8b) Ti bearing large, (7c), (8
ri is the oil supply groove, aS is the suction hole, a3t! Sea/I/Do &, (13d) is the oil supply groove, Ren! 1 is an extension. In other figures, the same reference numerals indicate the same or corresponding parts.

Claims (3)

[Claims] (1) Sealing plates are interposed between both end surfaces of the cylinder and the main bearings and end bearings on the outside that support the crankshaft, each slidingly abutting against both end surfaces of the rolling piston rotated within the cylinder. , characterized in that a supply passage for suction lubricating oil to the inner space of the rolling piston and the bearing holes of each of the bearings is formed between the sealing plates and the inner surfaces of the flange portions of the main bearing and the end bearing. A lubricating oil supply device for rolling piston compressors. (2) A claim in which a lubricating oil suction hole forming a part of a suction lubricating oil supply passage is opened at one end of a cylinder immersed in lubricating oil in a closed container or at an extension of a sealing plate. A lubricating oil supply device for a rolling piston compressor according to item 1. (3) The rolling piston according to claim 1, wherein the oil supply grooves of each bearing or the oil supply grooves provided on each sealing plate, which form part of the suction lubricating oil supply passage, are simultaneously formed at the time of molding each of these grooves. Lubricating oil supply device for type compressors.