JPH045753Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to a rotary compressor in which a motor part and a compressor part are housed in a sealed case, and in particular, the invention relates to a rotary compressor that houses a motor part and a compressor part in a sealed case. This invention relates to a rotary compressor equipped with a guide plate for separating oil from compressed gas.

(Prior Art) As shown in FIG. 10, a rotary compressor has an electric motor section 2 provided in the upper part of a sealed case 1, and a compressor section 4 driven by a rotating shaft 3 of the electric motor section 2 in the lower part. is provided.

The electric motor section 2 includes a stator 5 that is press-fitted into the sealed case 1 and a rotor 6 that connects the rotating shaft 3. The compressor section 4 includes a cylinder block 7 that forms a cylinder chamber, and a rotor 6 that connects the rotary shaft 3.
A main bearing 8 and a sub-bearing 9 support the rotary shaft 3 while partitioning the upper and lower parts of the cylinder chamber provided above and below the cylinder chamber.
It consists of a roller 10 that fits into the crank part 4a of the rotating shaft 3 and slides around the cylinder chamber, and a blade (not shown) that comes into contact with the roller 10 and partitions the cylinder chamber into a compression side and a suction side. There is.

In this rotary compressor, refrigerant gas from a suction pipe 11 is compressed in a compressor section 4 and then discharged into a sealed case 1 through an air gap between a stator 5 and a rotor 6 of an electric motor section 2. The liquid is discharged from a discharge pipe 12 provided at the top of the sealed case 1.

However, the refrigerant gas discharged from the compressor section 4 contains oil supplied to each sliding section of the compressor section 4, and if this oil is discharged from the discharge pipe 12 as it is, the amount of oil in the refrigeration cycle increases. As a result, the heat exchange efficiency deteriorates and the lubricating oil at the bottom of the sealed case 1 becomes insufficient.

For this purpose, as proposed in Japanese Utility Model Publication No. 57-59669, for example, as shown in FIG. The flow rate of the refrigerant gas rising through each gap is slowed down to increase oil separation efficiency, and the refrigerant gas rising through the gas passage 13 is
As shown in the figure, the oil is regulated by a guide plate 14 provided on the upper part of the oil and separated by passing through a stator coil end 15.

However, in order to attach this guide plate 14, a step d is formed on the outer circumference of the stator 5 by cutting or the like, and it is attached to the step d by welding, screwing, fitting, etc. There is a problem in that precision is required and costs are high.

Further, since the stator 5 is press-fitted into the sealed case 1, the inner peripheral surface thereof is required to have relatively high precision in terms of dimensional accuracy, and must be relatively smooth. It is not allowed to attach it to the sealed case 1 side from the viewpoint of assembly and manufacturing.

(Problem to be solved by the invention) The invention was made in consideration of the above-mentioned circumstances.When installing a guide plate for oil separation of compressed gas on the outer periphery of the stator of the electric motor part, the invention An object of the present invention is to provide a rotary compressor in which a guide plate can be easily removed and a guide plate can be prevented from coming off.

[Structure of the invention] (Means for solving the problem) In order to achieve the above object, the present invention houses an electric motor part and a compressor part driven by the electric motor part in a sealed case, and The stator of the electric motor,
In a rotary compressor fixed inside a sealed case,
A notch is formed in advance on the outer circumference of the stator along its axial direction to form a gap between it and the sealed case,
On the other hand, a guide plate having a ring-shaped guide part and a leg part extending from the guide part, and which guides compressed gas to the stator coil end by the guide part, has a protrusion part that engages with a gap. As well as forming
The guide plate is fixed by inserting the protrusion into the gap.

(Function) According to the configuration of the present invention, a notch is formed in advance on the outer periphery of the stator, and the stator is press-fitted into the sealed case, and the legs extending from the guide portion of the guide plate are inserted into the gap created. By pushing and inserting the protrusion formed in the part, the protrusion is elastically engaged from both sides of the inner peripheral surface of the sealed case and the outer peripheral surface of the stator core where the notch is located, and the guide plate can be installed. This is what I decided to do.

(Embodiment) A preferred embodiment of the rotary compressor according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a cross section of the main parts of the rotary compressor of the present invention. In the figure, 1 is a closed case, and the stator 5 is press-fitted into the closed case 1 on the upper part, and the rotor 6 is connected to the rotary shaft 3. An electric motor section 2 is provided.

Although the lower part of the sealed case 1 is not shown, the first
As explained in FIG. 0, a rotating machine section 4 driven by a rotating shaft 3 is provided.

The sealed case 1 consists of a main case 1a into which the compressor section 4 and the electric motor section 2 are press-fitted, and an upper case 1b that closes the case 1a after being press-fitted, and a refrigerant discharge pipe 12 is provided in the upper case 1b. .

Now, in the present invention, the stator 5 is provided with a guide plate 1 for guiding the refrigerant gas toward the stator coil end 15 side and separating oil in the gas as shown in the figure.
6 is provided.

First, the stator 5 is made of laminated stator cores 5a as shown in FIG. On the outer periphery of the stator core 5a, there is a recess 18 for forming a gas passage 17 between the stator core 5a and the sealed case 1 when the stator core 5a is punched out, and a U-shaped notch 19 for attaching a guide plate 16 as described later. form.

The guide plate 16 includes a guide part 20 formed in a ring shape with an L-shaped cross section, a seat part 21 formed by cutting out the guide part 20 and bending it downward as shown in FIG. As shown in FIG.
The protrusion 2 for engaging the gap 23 formed by the
It consists of 4.

The projection 24 is formed by rounding the lower end of the leg 22 into a circular shape as shown in FIG.
Form by folding a toward the inside and upward.

Alternatively, the protrusion 24 may be formed by simply bending the lower end of the leg 22 into an L-shape as shown in FIG.

As explained in FIG. 10, the compressor section 4 is
Alternatively, the cylinder block 7 may be press-fitted into the sealed case 1, or as shown in FIG. It may be fixed in the sealed case 1 by press-fitting, or it may be fixed only by the upper sheet metal frame 25 as shown in FIG.

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

First, the compressor section 4 and the electric motor section 2 are press-fitted into the main case 1a of the sealed case 1 and housed therein.
In this case, a gas passage 17 formed by a recess 18 and a gap 23 formed by a notch 19 are formed between the sealed case 1 and the stator 5 in the axial direction thereof.

Next, from the top of this main case 1a, guide plate 1
6, with its protrusion 24 positioned in the gap 23, the protrusion 24 is placed in the gap 23 as shown in FIG.
Insert into. At this time, the protrusion 24 is pushed in until the seat 21 of the guide plate 16 is seated on the stator 5, as shown in FIG.

By pushing in the protrusion 24, the tip 2
Since 4a is formed in an L-shape, it comes into contact with stator core 5a of stator 5 and is prevented from coming off.

After installing the guide plate 16, the upper case 1b is fitted into the upper opening of the main case 1a and soldered with silver.

When driving the compressor, the guide plate 16 connects the gas passage 17 formed between the stator 5 and the sealed case 1.
The guide portion 20 guides the refrigerant gas rising through the gap 23 toward the stator coil end 15 side, thereby exhibiting an oil separation function.

[Effect of the invention] According to the invention, a notch is formed in advance on the outer periphery of the stator, and the legs extending from the guide portion of the guide plate are inserted into the gap created by fixing the stator in the sealed case. By simply pushing and inserting the protrusion formed on the part, the protrusion can be elastically engaged from both sides of the inner peripheral surface of the sealed case and the outer peripheral surface of the stator core where the notch is located. The guide plate can be more easily attached than directly attached to the inner circumferential surface of the guide plate or the stator, and the guide plate can be prevented from coming off.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of essential parts showing an embodiment of the rotary compressor of the present invention, Fig. 2 is a plan view of the guide plate of the invention, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Fig. 4
The figure is a sectional view taken along the line - - of Fig. 2, Fig. 5 is a plan view showing details of the stator core in the present invention, Fig. 6 is an enlarged sectional view of the main part in Fig. 1, and Fig. 7 is a guide in the present invention. Main part diagram showing another example of the plate, No. 8
9 is a sectional view showing another embodiment of the rotary compressor of the present invention, FIG. 10 is a sectional view of a conventional rotary compressor, and FIG. 11 is a sectional view taken along the - line in FIG. be. In the figure, 1 is a sealed case, 2 is a motor section, 3 is a rotating shaft, 4 is a compressor section, 5 is a stator, 16 is a guide plate, 19 is a notch, 23 is a gap, and 24 is a protrusion.

Claims (1)

[Scope of utility model registration request] In a rotary compressor in which an electric motor section and a compressor section driven by the electric motor section are housed in a sealed case, and a stator of the electric motor section is fixed inside the sealed case, there is a A notch is formed in advance along the side to form a gap between the airtight case and the airtight case, and the other side has a ring-shaped guide part and legs extending from the guide part, and the compressed gas is guided through the guide part. A rotary compressor characterized in that a protrusion that engages with the gap is formed on the leg of the guide plate that guides the stator coil end, and the guide plate is fixed by inserting the protrusion into the gap. .