JPH07117044B2 - Hermetic compressor - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hermetic compressor, and more particularly to a hermetic compressor suitable for collecting ferrous foreign substances and non-ferrous foreign substances mixed in refrigerating machine oil.

[Conventional technology]

In a conventional hermetic compressor of this type, as shown in Japanese Utility Model Publication No. 54-33123, a magnet is fitted to a pin protruding from at least one of the lower end surface of the compressor pump section and the inner bottom section of the hermetic case. They are fitted together, and a gap smaller than the thickness of the magnet is formed between the tip of the pin and the bottom surface of the closed case or the bottom surface of the compressor pump.

[Problems to be solved by the invention]

The above-mentioned prior art is capable of adsorbing iron-based foreign matter such as welding spatter and wear powder around the magnet, but iron-based foreign matter in the other direction,
In addition, it was difficult to capture non-ferrous foreign substances such as grinding stone powder, casting sand, and oxide scale mixed in refrigerating machine oil.

An object of the present invention is to provide a hermetic compressor capable of reliably capturing ferrous and non-ferrous foreign substances mixed in refrigerating machine oil.

[Means for solving problems]

The above-mentioned object is to provide a closed container having an electric part and a pump part inside, oil stored in the closed container, the electric part and the pump part, and to connect the oil to the sliding part of the pump part. In the hermetic compressor having a hole formed in the axial direction for supplying to the shaft and a rotary shaft formed with a hole perpendicular to the axial hole, the rotary shaft is A hermetic compressor provided with a debris removing means made of a leaf spring which opens in the rotational direction of the rotary shaft so as to form a wedge-shaped gap in the hole and upstream of the hole perpendicular to the axial hole. It is achieved by

[Action]

Refrigerating machine oil passing through the dust removing means arranged in the axial hole of the rotary shaft arranged in the rotary shaft inner hole of the hermetic compressor and upstream of the hole perpendicular to the axial hole. Both the ferrous foreign matter and the non-ferrous foreign matter mixed therein are captured in the wedge-shaped gap.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. An electric part and a pump part are arranged inside the closed container 1. The electric part is composed of a stator 2 and a rotor 2 ', and the pump part is composed of a main bearing 3, a rotary shaft 4, a cylinder 5, rollers 6, vanes 7, an auxiliary bearing 8 and the like. The stator 2 is fixed to the closed container 1 by shrink fitting, and the main bearing 3 is fixed to the closed container 1 by welding or the like. The rotor 2'is fixed to the rotary shaft 4 by press fitting or the like. The roller 6 is fitted in the eccentric part of the rotary shaft 4. The vane 7 is pressed against the roller 6 by the spring 9. With the rotation of the rotary shaft 4, the roller 6 is eccentrically rotated, and the vane 7 reciprocates.

By the eccentric rotation of the roller 6, pumping operations of suction, compression and discharge are performed. Further, due to the reciprocating motion of the vanes 7 and the resistance difference between both ends of the oil supply piece 10, the refrigerating machine oil 14 is supplied to the hollow inner hole portion 12 of the rotary shaft 4 through the oil supply pipe 11.

A ring-shaped magnet 13 is locked in the hollow inner hole 12, and the refrigerating machine oil 14 that has passed through the inner diameter portion of the ring-shaped magnet 13 is supplied to the sliding surface through a horizontal hole 15 formed in the eccentric portion of the rotating shaft. That is, the iron-based foreign matter is captured by the ring-shaped magnet 13 and can be prevented from entering the sliding portion.

In FIGS. 2 and 3, spiral leaf springs 16 are arranged at both ends of the ring-shaped magnet 13 to prevent non-ferrous foreign matter from leaving a gap 16 ′ between the leaf springs 16.
Is to be captured in.

That is, as shown in FIG. 3, the gap 16 'of the leaf spring 16 is open in the rotational direction 17 of the rotary shaft 4, so that the non-ferrous foreign matter enters the gap 16'.

Therefore, since the foreign matter contained in the oil is not supplied to the sliding portion, it is possible to prevent galling and wear of the sliding portion due to the foreign matter.

〔The invention's effect〕

According to the present invention, the rotary shaft is opened in the rotational direction of the rotary shaft so as to form a wedge-shaped gap in the axial hole of the rotary shaft and on the upstream side of the hole perpendicular to the axial hole. The oil supplied to the sliding portion is supplied to the sliding portion through the hole perpendicular to the axial hole after passing through the dust removing means. Therefore, both ferrous and non-ferrous foreign substances mixed in the oil are trapped in the wedge-shaped gap when passing through the dust removing means, and the ferrous and non-ferrous foreign substances are prevented from entering the sliding portion. There is an effect that it can be surely prevented, and damages such as biting and abrasion of the sliding surface due to the entry of foreign matter into the sliding portion are prevented and reliability is improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a hermetic compressor to which an embodiment of the present invention is applied, and FIG. 2 is a principal sectional view of a rotary shaft portion used in a hermetic compressor having the present invention. The figure is a sectional view taken along line AA of FIG. 1 ... Airtight container, 2 ... Stator, 3 ... Main bearing, 4 ... Rotating shaft, 5 ... Cylinder, 6 ... Roller, 7
…… Vane, 8 …… Secondary bearing, 9 …… Spring,
10 …… piece, 11 …… oil supply pipe, 12 …… hollow inner hole, 13…
… Ring magnets, 14 …… Refrigerating machine oil, 15 …… Horizontal holes, 16 ……
Spiral leaf spring, 17 ... Arrow indicating the direction of rotation, 18 ... Circular tube.

Claims (1)

[Claims] 1. A closed container having an electric part and a pump part inside, oil stored in the closed container, the electric part and the pump part are connected, and the oil is slid on the pump part. In a hermetic compressor having a hole formed in the axial direction for supplying to a portion and a rotary shaft formed with a hole perpendicular to the axial hole, the rotary shaft is the axial direction of the rotary shaft. A leaf spring dust removing means that opens in the rotational direction of the rotary shaft so as to form a wedge-shaped gap in the hole of the rotary shaft and upstream of the hole perpendicular to the axial hole. A hermetic compressor.