JPH0610851A - Horizontal scroll compressor - Google Patents

Abstract

PURPOSE:To prevent lubricating oil from being splashed up to a compression chamber side due to rotation of a rotor at operation time in a flooded condition by sealing an opening part of a frame, connected to a compression chamber in the compression chamber side of the rotor and stator, with a shield member. CONSTITUTION:A shielding member 26 is mounted between a frame 6 and a rotor 8 and between the frame and a stator 7, to shield a hole 23 which is an opening part of the frame 6 connected to a compression chamber 5 in a compression chamber side of the rotor 8 and the stator 7. In the case that an oil level of an oil reservoir 2 in a shell 1 rises to immerse a motor part by mixing together oil with a refrigerant in a flooded condition, lubricating oil in the oil reservoir 2 and the refrigerant are stirred by rotating the rotor 8 in a motor part at the time of operation. However, since the hole 23 between the rotor 8 and the stator 7 and the frame 6 is shielded by the shielding member 26, the lubricating oil is prevented from being splashed up and brought out to the outside of the shell. In this way, reliability can be improved in use of a compressor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal scroll compressor for compressing a gas body (refrigerant) such as CFC used in a refrigeration system or an air conditioner.

[0002]

2. Description of the Related Art FIG. 4 shows, for example, Japanese Patent Laid-Open No. 2-15749.
FIG. 4 is a cross-sectional view showing a conventional horizontal scroll compressor disclosed in Japanese Patent Publication No. 3), in which 1 is a shell having an oil sump 2 therein, 3 is a fixed scroll, and 4 is an orbiting scroll. They are housed inside the shell 1 and are assembled together so as to form a compression chamber 5. A frame 6 is attached to the side of the orbiting scroll 4 and serves as a bearing support for supporting the orbiting scroll 4 in the axial direction. Reference numeral 7 is a stator, and 8 is a rotor, which constitute a scroll driving motor portion attached to the frame 6. A main shaft 9 is inserted and fixed to the rotor 8 at one end, and has an oil pump 10 facing the inside of the oil sump 2 and an oil supply hole 11 extending in the linear direction at the other end. 12
Is a balancer fixed to the rotor, and 22 is a column for fixing the oil pump to the stator 7.

Incidentally, 13 and 14 are a suction pipe and a discharge pipe, and 1
5 and 16 are inlet and outlet, 17, 18 and 19
Are bearings as lubricated parts, and 20 and 21 are left and right coil ends of the stator 7. Further, 23 is a hole in the frame through which the coil cooling refrigerant passes, and 24
Is a passage through which the refrigerant passes from the suction port 15 to the suction port 25 of the fixed scroll 3.

In the scroll compressor constructed as described above, when the main shaft 9 is driven by the stator 7 and the rotor 8 of the motor section, the suction pipe 13 to the suction port 15 and the passage 24 are driven.
The refrigerant passing through is sucked into the compression chamber 5, and the compressed gas passes through the discharge port 16 and is discharged from the discharge pipe 14 to the outside of the shell 1 according to a generally known compression principle of a scroll.

On the other hand, when the rotor 8 rotates, the oil pump 10 sucks the lubricating oil in the oil sump 2, passes through the oil supply hole 11 and supplies oil to the bearings 17, 18 and 19,
Then, the lubricating oil passes through an oil return hole (not shown) and returns to the oil sump 2.

[0006]

Since the conventional scroll compressor is constructed as described above, for example, the refrigerant is sunk in the compressor, that is, the lubricating oil is mixed with the refrigerant in the stagnation state. , Sump 2 in shell 1
When the oil surface of is raised and is immersed in the motor portion, the oil and the refrigerant in the oil sump 2 are agitated by the rotation of the rotor 8 of the motor portion during operation, and soar into the shell 1. The lubricating oil and the refrigerant pass through the passage 24 together with the refrigerant guided from the suction pipe 13 and are taken into the compression chamber 5 from the suction port 25 of the fixed scroll 3, so that the lubricating oil is taken out from the shell. As a result, the lubricating oil in the shell 1 is depleted, and the oil supply to the sliding parts of the bearings 17, 18 and 19 is stopped, and the sliding parts are seized.

The present invention has been made in order to solve the above problems, and reduces agitation of lubricating oil and a refrigerant in a sleeping state, and seizure of a sliding portion or the like due to oil depletion in a shell. It is an object of the present invention to provide a horizontal scroll compressor that can prevent the occurrence and reliably improve the reliability in use of the compressor.

[0008]

A horizontal scroll compressor according to the present invention is a compression formed by a fixed scroll and an orbiting scroll arranged at one end inside a hermetic shell having an intake port and a discharge port. A chamber, a main shaft for driving the orbiting scroll, a rotor and a stator of a motor unit for driving the main shaft, and a main shaft to which the rotor and the stator are attached is rotatably supported in a central portion and the rotor and the stator are provided. A frame that surrounds the outer periphery of the rotor and an opening is formed on the compression chamber side of the rotor and stator, an oil pump provided at one end of the main shaft that has an oil supply hole opened in the axial direction, and a suction pump In a scroll compressor composed of an oil sump or the like for accumulating the lubricating oil to be stored in a closed shell, In condensation chamber side, the opening portion of the frame communicating with the compression chamber, a structure which is adapted seal by the shielding member.

Further, a compression chamber formed by a fixed scroll and an orbiting scroll arranged at one end inside a closed shell having an inlet and an outlet, a main shaft for driving the orbiting scroll, and the main shaft. A rotor and a stator of a motor unit that drives the rotor, a main shaft to which the rotor and the stator are attached is rotatably supported in a central portion, and the outer circumference of the rotor and the stator is encircled and the compression chamber side of the rotor and the stator is It is composed of a frame formed with an opening, an oil pump provided at one end of the main shaft having an oil supply hole opened in the axial direction, and an oil sump for accumulating lubricating oil sucked by the oil pump in a closed shell. In the scroll compressor described above, on the compression chamber side of the rotor and the stator, an opening portion of a frame communicating with the compression chamber is formed. So as to seal by the shielding member,
Further, an oil pump cover is provided so as to surround the oil pump on the oil pump side.

[0010]

In the horizontal scroll compressor according to the present invention, the rotor and the stator formed by opening the frame are closed by a shielding member on the compression chamber side, so that the rotor is rotated during operation in the sleeping state. It is possible to prevent the lubricating oil from being splashed up to the compression chamber side from the opening portion of the frame communicating with the compression chamber on the compression chamber side of the rotor and the stator by the stirring in the oil sump. Therefore, it is possible to prevent the lubricating oil from being carried out of the compression chamber to the outside of the shell, and by preventing oil depletion in the shell, it is possible to prevent seizure of the sliding portion and the like.

Further, since the oil pump cover surrounding the oil pump is provided on the oil pump side, splashing of the lubricating oil on the pump side due to the rotation of the rotor in the lying state can be prevented.

[0012]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. The same parts as those of the conventional structure are designated by the same reference numerals, and detailed description thereof will be omitted. 1 is a cross-sectional view of a scroll compressor of the present invention, and FIG. 2 is a perspective view of a shielding member 26 of the present invention mounted between the rotor 8, the stator 7 and the frame 6 in FIG. In FIG. 2, a hole (space) 26a for inserting into the frame 6 is opened in the central portion of the shielding member 26, and a rib 26c for screwing to the frame is attached around the hole, Reference numeral 26b is a screw hole provided to pass a screw through the rib 26c. Also, on the outer peripheral portion of the shielding member 26,
A rib 26d for covering the coil end of the stator 7 is provided.

The shielding member 26 is mounted between the frame 6 and the rotor 8 and the stator 7, and is a hole 23 which is an opening portion of the frame 6 communicating with the compression chamber 5 on the compression chamber side of the rotor 8 and the stator 7. (See FIG. 1).

In the scroll compressor configured as described above, the oil is mixed with the refrigerant in a state where the refrigerant is laid in the compressor, that is, in the laid state, and the oil level of the oil sump 2 in the shell 1 is increased. When the motor 8 rises and is immersed in the motor section, the oil sump 2 is generated by rotation of the rotor 8 of the motor section during operation.
The lubricating oil and the refrigerant inside are agitated, but since the holes 23 between the rotor 8 and the stator 7 and the frame 6 are shielded by the shielding member 26, the lubricating oil does not splash, and the lubricating oil is outside the shell. It will not be taken out. Therefore, the inside of the shell is not depleted of oil, and it is possible to prevent the sliding portion and the like from being seized.

FIG. 3 is a perspective view of an oil pump cover 27 in which the column 22 for the oil pump has a bottomed cylindrical shape.
27a is a pipe through hole for oil intake of the oil pump 10 (see FIG. 1). In the first embodiment, the shielding member 26
Although the oil pump cover 27 is attached to the frame 6, by further forming the oil pump cover 27 into a bottomed cylindrical shape as shown in FIG. 3, splashing of the lubricating oil on the pump side due to the rotation of the rotor 8 in the lying state can be prevented, Further effects can be expected.

[0016]

As described above, according to the present invention, on the compression chamber side of the rotor and the stator, the opening portion of the frame communicating with the compression chamber is closed by the shielding member, so that the operation is performed in the sleeping state. It is possible to prevent the lubricating oil from rising to the compression chamber side due to the rotation of the rotor. Therefore, there is no concern that the lubricating oil will be discharged from the compression chamber to the outside of the shell and that the lubricating oil will be depleted in the shell. Therefore, the supply of the lubricating oil to the sliding portion is not stopped, seizure or the like can be prevented from occurring in the sliding portion, and the reliability in use of the compressor can be reliably improved.

Further, since the bottomed cylindrical oil pump cover is provided, it is possible to prevent splashing of the lubricating oil on the pump side due to the rotation of the rotor in the laid state, and to achieve the above-mentioned effect.

[Brief description of drawings]

FIG. 1 is a sectional side view showing a scroll compressor according to an embodiment of the present invention.

FIG. 2 is a perspective view of a disc-shaped body which is an example of a shielding member used in the present invention.

FIG. 3 is a perspective view of a bottomed cylindrical body used in this scroll compressor.

FIG. 4 is a sectional side view showing a conventional scroll compressor.

[Explanation of symbols]

 1 Shell 2 Oil Reservoir 3 Fixed Scroll 4 Oscillating Scroll 5 Compression Chamber 6 Frame 7 Stator 8 Rotor 9 Spindle 10 Oil Pump 15 Suction Port 16 Discharge Port 23 Hole 26 Shielding Member 27 Oil Pump Cover

Claims (2)

[Claims] 1. A compression chamber formed by a fixed scroll and an orbiting scroll arranged at one end inside a closed shell having an inlet and an outlet, a main shaft for driving the orbiting scroll, and a main shaft. A rotor and a stator of a motor unit that drives the rotor, a main shaft to which the rotor and the stator are attached is rotatably supported in a central portion, and the outer circumference of the rotor and the stator is encircled and the compression chamber side of the rotor and the stator is It is composed of a frame formed with an opening, an oil pump provided at one end of the main shaft having an oil supply hole opened in the axial direction, and an oil sump for accumulating lubricating oil sucked by the oil pump in a closed shell. In the scroll compressor described above, on the compression chamber side of the rotor and the stator, the opening portion of the frame communicating with the compression chamber is shielded. A horizontal scroll compressor characterized by being sealed by a member. 2. A compression chamber formed by a fixed scroll and an orbiting scroll arranged at one end inside a closed shell having an inlet and an outlet, a main shaft for driving the orbiting scroll, and the main shaft. A rotor and a stator of a motor unit that drives the rotor, a main shaft to which the rotor and the stator are attached is rotatably supported in a central portion, and the outer circumference of the rotor and the stator is encircled and the compression chamber side of the rotor and the stator is It is composed of a frame formed with an opening, an oil pump provided at one end of the main shaft having an oil supply hole opened in the axial direction, and an oil sump for accumulating lubricating oil sucked by the oil pump in a closed shell. In the scroll compressor described above, on the compression chamber side of the rotor and the stator, the opening portion of the frame communicating with the compression chamber is shielded. A horizontal scroll compressor, characterized in that an oil pump cover is provided that is sealed by a member and surrounds the oil pump on the oil pump side.