JPS58192993A - Lubricating oil supplying device for horizontal type rotary compressor - Google Patents

Abstract

PURPOSE:To make a branched delivery pipe or the like for oil feeding unnecessary and enable to reduce the number of parts as well as the manufacturing cost by a constitution wherein the pressure feeding of the lubricating oil to oil receiving parts is effected by a high-pressure path formed in an oil cover. CONSTITUTION:Compressed refrigerant is changed into discharging gas and flows from a discharging chamber 15 into the high-pressure path 26, formed in the oil cover 24, through discharging paths 17, 18, 19, the energy of the flow of refrigerant is increased by the drooping part 26a of the path 26 and sucks up the lubricating oil from an oil suction port 26e provided at the lowest part of the path 26 when the gas is passing through a rise-up part 26c. The discharged gas and the lubricating oil are mixed and flowed through the high-pressure path 26 and the lubricating oil is reserved in the oil receiving part 25 formed on the end plate 11 of a bearing at the opposite side of a motor while this lubricating oil is sucked and fed from an oil feeding path 27 to respective sliding parts by the sucking effect of the oil suction plate 28 of a rotary shaft 5. Thus, the pressure feeding of the lubricating oil to the oil cover 24, therefore, the branched oil discharging pipe or the like for oil feeding, which are provided in the conventional compressor, are not necessitated and the number of parts as well as the manufacturing cost of the compressor may be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lubricating oil supply device for supplying lubricating oil to each sliding part in a horizontal rotary compressor.

Conventionally, as shown in Japanese Utility Model Publication No. 53-32336, a horizontal rotary compressor is known in which a compression element and an electric element are disposed in a closed container so that the positional relationship between the compression element and the electric element is left and right.

An example thereof will be explained with reference to FIG.

In the figure, the rotary compression element a includes a cylinder b, a bearing e on the opposite side of the crankshaft d that closes the compression chamber C inside the cylinder, a bearing f on the motor side of the crankshaft d, and a bearing f on the motor side of the crankshaft d.
A piston h is inserted into the eccentric part g and rotates eccentrically along the inner surface of the compression chamber C, and a radial sliding guide /, l, 'l' (not shown) formed on the side wall of the compression chamber C is provided. Therefore, it is formed by a sliding blade (not shown) whose tip is always in contact with the piston h.

In this rotary compression element a, the compressed gas is 1.
! ] When passing through the outlet hole i, it flows into the branch discharge pipe connected to the discharge hole i, is accelerated by the constriction part k formed as a part of this branch discharge pipe, and passes through the lubricating oil inlet 1 at high speed. At this time, the lubricating oil m is sucked into the space 1fllp provided between the first cover plate n and the second cover plate 0, and the lubricating oil m is separated and stored. This stored lubricating oil is applied to the crankshaft d
Each rotating sliding part is supplied with oil from the end of the oil filler g.

However, in such a conventional oil supply device, the oil supply branch 1λ1
There are many parts such as the outlet pipe 3, the first cover plate n1, the second cover plate 0, and the screws for fixing the branch discharge pipe for refueling (none of which are shown), and the number of workpieces is limited. These parts have been forced to increase in cost due to the increase in costs and increase in work time.

The present invention eliminates such conventional drawbacks and provides a lubricating device with a simple structure using a small number of parts.4 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 2 to 2 of the accompanying drawings. This will be explained with reference to Figure 6.

In the figure, 1 is a cylindrical airtight container with a stator 2 inside.
and a motor element 4 consisting of a rotor 3, and a compressor element 6 driven by the motor graft 4 via a rotating shaft 5.
They are arranged in a positional relationship on the left and right. The compression element 6 includes a sill 8 having a compression space 7 formed therein, a pinion 9 disposed within the compression space 7 and rotating eccentrically by the rotation shaft 5, and a pinion 9 that closes the compression space 7. , and a motor-side bearing end plate 1o that supports the rotating shaft 5, a non-motor side bearing end plate 11, and a binuton 9 that is attached to the sill 8 so as to be retractable into the compression space 7,
The vane (not shown) is biased so as to be in constant contact with the vane. 12 is 1) 11 Motor side bearing end plate 1
The discharge port is formed at 0, and is provided with a discharge 9j'' 13 and a valve foot 14. 16 is a discharge cover fitted to the motor side bearing end plate 10 described in [)j], forming a discharge chamber 16. 17. 18. 19i1 each n'iJE
A discharge passage formed in series in the motor side bearing end plate 10, the sill 8, and the anti-motor side bearing end plate 11, one end communicating with the discharge chamber 16, and the other end d: the anti-motor side bearing end plate 1. It is more open [1].

Reference numeral 20 denotes a lubricating device provided on the side of the bearing end plate 11 on the side opposite to the motor, and includes a flat plate 22 having an opening 21 that communicates with the discharge passages 17, 18, and 19, and a flat plate 22 that overlaps with the flat plate 22 and is connected to the opposite side of the motor. It consists of a hydraulic bar 24 collinear with the side bearing end plate 11 and the port 23. This oil pressure bar 24 has an oil receiver located in the center part 25 by press working, and one end communicates with the opening 21 of the 01J air plate 22.
At the other end, a groove-shaped high pressure passage 26 is formed, which extends in the rotational direction around the oil receiver part 26 and communicates with the oil receiver part 25. The high-pressure passage 26 includes a hanging portion 26a extending approximately vertically from the opening 21 of the flat plate 22, a horizontal portion 26b extending approximately horizontally from the tip of the hanging portion 26a in a gentle arc, and a tip of the horizontal portion 26b. an opening 26b extending horizontally from its tip and opening into the oil pan 26;
The oil suction port 266 opens downward at an acute angle α closer to the rising portion 26C than the joint between the rising portion 6b and the rising portion 260. , 27 is an oil supply path formed extending in the axial direction of the rotating shaft 5, and the tip thereof is opened to branch into each sliding portion as is well known. 28 is a well-known oil suction plate provided at the rear end of the oil supply path 27, and 29 is this oil suction plate 28.
This is an oil inlet fitting that also serves to prevent the oil from coming off. 3o is a lubricating oil reservoir formed at the bottom of the sealed container 1, and the oil suction port 268 of the oil bar 24 is always immersed in the lubricating oil of this lubricating oil reservoir 30.

In the above configuration, the refrigerant compressed by the compressor element 6 becomes discharge gas from the discharge chamber 16 to the discharge passage 17,
18, 19 and into the high pressure passage 26. The drooping portion 262L of the high pressure passage 26 adds momentum to the flow of the refrigerant, and as the refrigerant passes through the vertical seam portion 260, lubricating oil is sucked up from the oil suction port 26+9 provided at the lowest portion of the high pressure passage 26. A mixture of discharged gas and lubricating oil flows through the high-pressure passage 26, and the oil receiver formed on the bearing end plate 11 on the side opposite to the motor stores the lubricating oil in the portion 25. This stored lubricating oil is sucked in by the suction action of the oil suction plate 28 of the rotating shaft 5 and is supplied to each rotating sliding portion from the oil supply path 27.

Therefore, with this configuration, the following effects can be obtained.

(1) The oil receiver for lubricating oil is fed under pressure to the section 25, and the hydraulic bar 24
Since the high pressure passage 26 is formed in the high pressure passage 26, there is no need for a branch discharge pipe j for refueling as in the conventional case, and the number of parts can be reduced and the cost can be reduced.

(2) Since the conventional branch discharge pipe for refueling is no longer required, the space for routing the branch discharge pipe for refueling is no longer required.
The compressor can be made smaller.

(3) The length of the high-pressure passage 26 can be minimized by eliminating the need for the conventional branch discharge pipe j for refueling, so flow path loss is small;
The amount of lubricating oil was increased by pressure feeding, and as a result, the lubricating oil ran out.

(4) Connect the oil inlet 266 of the high pressure passage 26 to the horizontal part 26b.
Since it extends at an acute angle from a point near the rising part 26C at the connection part between the rising part 26C and the rising part 26C, the lubricating oil in the lubricating oil reservoir part 30 can be sucked up smoothly, and the amount of lubricating oil can be increased by pressure feeding. In this embodiment, the flat plate 22 is interposed between the bearing end plate 11 on the non-motor side and the hydraulic bar 24 in order to form the high-pressure passage 26;
Similar effects can be expected even if the projected shapes of the parts 4 and 4 are made the same and the flat plate 22 is omitted.

As is clear from the above embodiments, the lubricating oil supply device for a horizontal rotary compressor of the present invention includes a motor element and a compressor element driven by the motor element via a rotating shaft in a closed container. A horizontal rotary compressor is constructed in which the electric motor element and the compressor element are arranged in the horizontal direction and a lubricating oil reservoir is formed at the bottom, and the compressor element is arranged in a compression space inside. a piston that rotates in the cylinder by a rotating shaft, and a motor-side bearing end plate and a non-motor-side bearing end plate that close both ends of the cylinder and support the rotating shaft. A discharge passage for the compressor element through which refrigerant flows is formed in the bearing end plate on the side opposite to the motor, and an oil supply 1 for the rotary shaft is formed in the bearing end plate on the side opposite to the motor. The open oil receiver is provided with a hydraulic bar having one end communicating with the oil receiver and a groove-shaped high pressure passage extending in the rotational direction around the oil receiver at the other end. The other end of the high pressure passage is communicated with the discharge passage of the bearing end plate on the side opposite to the motor, and the lubricating oil in the lubricating oil reservoir is sucked into the portion of the high pressure passage immersed in the lubricating oil reservoir. J is provided on the bearing end plate on the opposite side of the motor that constitutes the compressor element.
By installing the hydraulic bar, [1] (Since a high-pressure passage is formed to pump lubricating oil using the output refrigerant pressure, there is no need for a separate pipe line to pump lubricating oil as in the past, reducing the number of parts. This improves assembly workability, and since the high-pressure passage has the shortest length, passage resistance is reduced, pressure loss is reduced, and the amount of lubricating oil to be pumped is increased, reducing oil shortages. This method has various advantages, such as providing a highly reliable lubricating oil supply device.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a horizontal rotary compressor showing a conventional example, and FIG. 2 is a sectional view of a main part of a horizontal rotary compressor equipped with a lubricating oil supply device according to an embodiment of the present invention. Fig. 3 is a front view of nine compressor elements in the compressor, Fig. 4 is a side view of the compressor elements, and Fig. 6 is a cutaway plan view showing the main parts of the hydraulic bar in the compressor. . 1...Airtight container, 4...Electric motor element, 6
... Rotating shaft, 6 ... Compressor element, 7.
...Compression space, 8...Cylinder, 9...
... Piston, 10 ... Motor side bearing end plate,
11・・・・・・Non-motor side bearing end plate, 17°18.1
9...Discharge passage, 24...Hydraulic bar,
25... Oil pan, 26... High pressure passage,
266... Oil inlet, 3o... Lubricating oil reservoir.

Claims (1)

[Claims] An electric motor element and a compressor element driven by the electric motor element via a rotating shaft are arranged in a closed container, and the electric motor element and the compressor element are arranged laterally, and a lubricating oil reservoir is provided at the bottom. The compressor element is comprised of a cylinder that forms a compression space inside, a piston that rotates in the cylinder by a rotating shaft, and a horizontal rotary compressor with both ends of the cylinder closed. The compressor comprises a motor-side bearing end plate and a non-motor side bearing end plate that support a rotating shaft, and a discharge passage through which refrigerant discharged from the compressor element flows is formed in the non-motor side bearing end plate; On this bearing end plate on the side opposite to the motor, there is an oil pan in which the oil supply port of the rotating shaft is opened, and one end communicates with the oil pan in which the oil supply port of the rotating shaft is opened.
The other end of the oil receiver is provided with a hydraulic bar having a concave groove-shaped high pressure passage extending in the rotational direction with the oil receiver as the center, and the other end of the high pressure passage is communicated with the discharge passage of the bearing end plate on the side opposite to the motor. A lubricating oil supply device for a horizontal rotary compressor, wherein an oil suction port for sucking lubricating oil in the lubricating oil reservoir is provided in a portion of the high pressure passage that is still immersed in the lubricating oil reservoir.