JPH0286972A - Oil feeder for horizontal enclosed compressor - Google Patents

Abstract

PURPOSE:To enlarge a clearance between an inner gear and an outer gear and thereby improve metal workability by installing an oil feed passage, whose at least part is situated in the more upper part than a suction port, in the suction port of an internal gear type oil pump attached to one end of a crankshaft transmitting turning effort of a motor-operated element to a compressive element. CONSTITUTION:When a drive shaft 1 rotates, an inner gear 2 and an outer gear 3 also rotate, whereby displacement in a small room surrounded by these gears 2, 3 is varied. With this variation, oil is drawn up from an oil feed passage 8, passing through a suction port 6, and it flows into this small room and, after being discharged out of a discharge port 7, it passes through an oil passage 9, but since a position of each sliding or oil feeding port is situated in a more lower position than the oil feed passage 8, oil in the suction port is in no case exhausted even if there is a backflow of oil at the time of stoppage.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an oil supply system for a horizontal hermetic compressor, and particularly to an internal gear type oil supply system.

[Conventional technology]

Figures 3 and 4 show the internal gear type oil supply system shown in Japanese Patent Application No. 63-161299. In Figure 2, (1) is the drive shaft, and (2) is the inner gear of the internal gear type oil supply system. .

(3) is an outer gear, (4) is a casing that houses the inner gear and outer gear, (5) is a side brake provided on the drive shaft (1) side and seals the end face of the oil supply device), ( 61 is the suction port of the oil supply device provided in the casing, (7) is the discharge port, (8) is the oil supply flow path, (9
) is an oil flow path provided on the drive shaft and leading to the sliding part, and αG is an oil flow path.

Next, I will explain the operation. The rotation of the drive shaft (11) causes the inner gear (2) and the eccentrically attached outer gear (3) to rotate, and the volume surrounded by the inner gear (2) and outer gear (3) to change. According to
Oil is sucked up from the oil supply channel (8), passes through the suction port (6), and flows into the above-mentioned volume, and the oil discharged from the discharge port (7) passes through the oil channel (9). The water is supplied to each sliding part.

[Problem to be solved by the invention]

Conventional internal gear oil supply systems are configured with one or more gears, so when the operation is stopped, oil flows out from the gap between the inner gear (2) and the outer gear (3) and flows into the oil basin. A reflux phenomenon occurs where the water returns to its original state.

There is not enough oil in the gap between the gears, and when the oil pump is restarted, it becomes a gas pump, which significantly reduces the ability to pump up the oil. The problem was that the gap had to be made narrower.The challenge was to make this gap as large as possible in terms of the cover, workability, etc.

This invention was made to solve the above-mentioned problems, and an object thereof is to obtain an internal gear type oil supply device with good workability.

[Means to solve the problem]

The oil supply device according to this invention VC includes an internal gear type oil pump attached to one end of a crankshaft that transmits the rotational force of an electric element to a compression element, and an oil sump that supplies oil to an inlet of this oil pump, and at least Some of them are provided with an oil supply passage located above the suction port.

[Effect]

In the internal gear type oil supply device of this invention, the suction port is located below the upper end of the oil supply flow path, so even if oil flows back from the oil supply flow path to the oil pool when the compressor is stopped, the oil at the oil intake port will be It won't go away. therefore.

Since it does not become a complete gas pump even when restarted, it becomes a refueling device with excellent suction ability.

〔Example〕

An embodiment of the present invention will be described below.

In FIGS. 1 and 2, (1) is a drive shaft, (2) is an inner gear of an internal gear type oil supply device, and (3) is an outer gear. (4) is a casing for storing all of this inner gear (2) and outer gear (3).F), (5)
+ is a side plate provided on the drive shaft (11 side) and seals the end face of the oil supply device.
) is the suction port of the oil supply device, (7) is the discharge port, (
8) is an oil supply flow path. (9) is an oil flow path provided on the drive shaft and communicates with the sliding part, αG is an oil sump, and the oil surface thereof is located almost parallel to the drive shaft (1).

Next, the operation of the oil supply system according to the present invention will be explained. The rotation of the drive shaft (1) causes the inner gear (2) and outer gear (3) to rotate, and the volume of the small room surrounded by the inner gear (2) and outer gear (3) changes, thereby increasing the oil supply. Oil is sucked up from the flow path (8), passes through the suction port (6), flows into the above-mentioned small chamber, and is discharged from the discharge port (7) through the oil flow path (9). Supplied to moving parts.

Furthermore, since the oil filler port (6) is located at a lower position than the oil feed passage (8), even if there is a backflow of oil when the engine is stopped.

The oil in the suction port (6) never runs out. Therefore, even if the pump is restarted after a long period of time, it will not become a gas pump, and therefore sufficient suction capacity can be maintained.

〔Effect of the invention〕

According to this invention, an internal gear type oil pump is attached to one end of a crankshaft that transmits rotational force of an electric element to a compression element;
Oil is supplied to the suction port of this oil pump from an oil reservoir, and at least part of the oil supply passage is located above the suction port, so the oil supply capacity is excellent and the oil is supplied to the inner gear and outer gear. This has the effect of providing a lubricating device with good workability that can increase the gap between the two.

[Brief explanation of the drawing]

FIGS. 1 and 2 are sectional views of essential parts of a fuel supply apparatus according to an embodiment of the present invention, and FIGS. 3 and 4 are sectional views of essential parts of a conventional apparatus. (In the figure, (1) is the drive shaft, (2) is the inner gear, (3) is the outer gear, (61H inlet, and (8) is the oil supply flow path. The same symbols in the two figures are the same. or a corresponding portion.

Claims (1)

[Claims] An internal gear type oil pump attached to one end of the drive shaft that transmits the rotational force of the electric element to the compression element; oil is supplied from an oil reservoir to the suction port of this oil pump, and at least a part of the oil pump is located above the suction port. A lubrication system for a horizontal hermetic compressor with a lubrication flow path located at