JPH1122666A - Scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply a stable oil quantity to a slidingly movable part in a wide operating rotating speed range, and reduce a motive power loss by setting flowing resistance of an oil introducing pipe larger than flowing resistance of a lubricating passage being the pump delivery side. SOLUTION: A pump frame body 141 having a pump main body 140 is rotatably fitted in an opposite side end part of a compression mechanism 102 of a driving shaft 116, and an oil introducing pipe 142 to communicate with a lubricating oil reservoir 105 and a suction port of the pump main body 140 is arranged in the pump frame body 141. The pump main body 140 is driven by rotation of the driving shaft 116, and oil is sucked up from the lubricating oil reservoir 105 by the oil introducing pipe 142. Lubricating oil is supplied to respective bearings and a slidingly movable part through an oil feeding passage 144 arranged over the shaft inside total length of the driving shaft 116 from a delivery port of the pump main body 140. An inside diameter of the oil introducing pipe 142 is reduced more than the oil feeding passage 144, and flowing resistance is increased. When an operating frequency of a compressor increases, flowing resistance of the lubricating oil increases, and a supply oil quantity can be restrained. Therefore, excessive supply of the lubricating oil at high speed operation time can be restrained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor.

[0002]

2. Description of the Related Art A conventional compressor of this type is disclosed in
No.-64280. FIG. 3 shows a cross-sectional view of the scroll compressor.

[0003] A motorized section 27 comprising a stator 25 and a rotor 26 provided in a case (not shown) and a scroll compression section comprising a fixed scroll and an orbiting scroll (not shown) are connected by a horizontal crankshaft 28. The rotor 26 of the electric unit 27 is
On the other hand, a revolving scroll of a compression section is provided, and a refueling pump 30 is attached to a shaft end 29 of a rotor 26 of a crankshaft 28.

[0004] The refueling pump 30 is connected to the shaft end 2 of the crankshaft 28.
The outer rotor 33 and the inner rotor 3 having a trochoid pump mechanism between a pump case 31 attached to the pump 9 and an oil introduction pipe 32 rotatably mounted on the pump case 31
4 are provided. The pump case 31 includes the rotor 26
The oil introduction pipe 32 is bent downward outside the pump case 31 and is immersed in the oil 37 accommodated in the lower part of the inside of the compressor case. Rotation is prevented by contacting a stopper 38 provided on the case.

The oil supply pump 30 sucks up the oil 37 from the opening 39 at the lower end of the oil introduction pipe 32 by the rotation of the pump case 31 and the relative rotation of the outer rotor 33 and the inner rotor 34, and The oil is supplied to a required portion of the compressor through an oil supply path (not shown) provided.

[0006]

However, in the above-mentioned conventional configuration, the amount of oil supplied by the oil supply pump 30 increases almost in proportion to the rotation speed of the electric motor. Therefore, if the refueling amount is set to an optimum value at a low speed, the supply will be excessive at a high speed, and if it is set optimally at a high speed, the supply will be insufficient at a low speed. In order to solve this, it is conceivable to provide a resistance such as a throttle in the middle of the oil supply path, but the discharge pressure of the oil supply pump 30 is increased and power loss is large.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a scroll compressor which supplies a stable amount of oil to a sliding portion in a wide range of operation speed and has small power loss. Things.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is to make the flow resistance of an oil introduction pipe larger than the flow resistance of a lubrication path on the pump discharge side.

In order to solve the above-mentioned problems, the present invention is to make the flow resistance of the oil introduction pipe larger than the flow resistance of the oil supply passage.

In the above configuration, the supply amount of the lubricating oil is stable over a wide operating speed range, the reliability is high, and the power loss is small.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a fixed spiral blade part, a swirling spiral part meshing with the fixed spiral blade part to form a plurality of compression working spaces, and an electric motor for varying the number of revolutions in a closed container. A drive shaft that transmits the driving force of
A compression mechanism is constituted by a bearing component for supporting one end of the drive shaft and a rotation restricting component for preventing rotation of the spiral blade component and performing only rotation, and a pump having an oil introduction pipe is used as a bearing component for the drive shaft. Attach it rotatably to the end opposite to the side,
The discharge port of the pump communicates with an oil supply passage provided at the center of the drive shaft to form a lubrication path for lubricating the bearing component through the oil supply passage, and to reduce the flow resistance of the oil introduction pipe to the lubrication. This is larger than the flow resistance of the path.

According to the present invention, there are provided a fixed spiral blade component, a swirling spiral component which meshes with the fixed spiral blade component to form a plurality of compression working spaces, and a driving force of an electric motor for varying the number of revolutions in a closed container. A compression mechanism is constituted by a bearing component for arranging a drive shaft for transmission and supporting one end of the drive shaft, and a rotation restricting component for preventing rotation of the spiral blade component and only performing rotation, and has an oil introduction pipe. A pump is rotatably mounted on an end of the drive shaft opposite to the bearing component side, and a discharge port of the pump communicates with an oil supply passage provided at a center portion of the drive shaft, and a flow of the oil introduction pipe is controlled. The resistance is larger than the flow resistance of the oil supply passage.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS.
A compression mechanism 102 and an electric motor 103 for driving the compression mechanism 102 are provided inside 01, and a lubricating oil retainer 105 is provided at the bottom of the cylindrical portion of the closed casing 101. The compression mechanism 102
A fixed swirl vane component 108, a swirl swirl blade component 112 that meshes with the fixed swirl blade component 108 to form a plurality of compression work spaces 109, and a swivel drive that swivels a swivel drive shaft 114 provided on the swirl swirl blade component 112. Bearing 1
, The main shaft 11 of the drive shaft 116
Bearing part 120 having a bearing 119 for supporting the bearing 7
And a rotation restricting component 113 that prevents the rotation of the revolving spiral part 112 from rotating and performs only revolving.

The refrigerant gas sucked from the suction pipe 126 of the compressor into the compression working space 109 formed by the fixed spiral part 108 and the swirl spiral part 112 is compressed, and then discharged into the discharge hole 128 provided in the fixed spiral part 108. From the motor 10 through a communication hole 121 (not shown) penetrating the fixed spiral blade part 108 and the bearing part 120.
3 and is discharged from the discharge pipe 136 to the outside of the closed container 101.

At the shaft end of the drive shaft 116 on the side opposite to the compression mechanism 102, a trochoid type pump body which is a positive displacement rotary pump comprising a drive rotor (not shown) and a driven rotor (not shown). A pump frame 141 on which the 140 is disposed is rotatably fitted. The pump frame 141 has a lubricating oil 105 and a suction port (not shown) of the pump body 140.
And an oil introduction pipe 142 is formed to communicate with the oil.

In the oil supply operation, the pump body 140 is driven by the rotation of the drive shaft 116, whereby the oil introduction pipe 142
Pump oil from the lubricating oil reservoir 105,
The lubricating oil is supplied to each bearing and sliding portion from an outlet (not shown) 40 through an oil supply passage 144 provided over the entire length inside the drive shaft 116. At this time, the inside diameter of the oil introduction pipe 142 is smaller than the oil supply passage 144.

In the above configuration, the inner diameter of the oil introduction pipe 142 is smaller than that of the oil supply passage 144 to increase the flow resistance. Therefore, when the operating frequency of the compressor increases, the flow resistance of the lubricating oil increases. Thus, the amount of supplied oil can be suppressed, and the excessive supply of lubricating oil during high-speed operation can be suppressed.

[0018]

As is apparent from the above embodiment, the present invention is characterized in that a pump having an oil inlet pipe is rotatably mounted on the end of the drive shaft opposite to the bearing component side, and the discharge port of the pump is driven. Since it communicates with an oil supply passage provided at the center of the shaft to form a lubrication passage for lubricating the bearing parts via the oil supply passage, the flow resistance of the oil introduction pipe is made larger than the flow resistance of the lubrication passage, When the operating frequency of the compressor increases, the flow resistance of the lubricating oil increases, the amount of lubricating oil can be suppressed, and the excessive supply of lubricating oil during high-speed operation can be suppressed. Power loss can be suppressed smaller than increasing the flow resistance of the path.

[Brief description of the drawings]

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

FIG. 2 is an enlarged sectional view of a refueling pump section showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 101 Closed container 102 Compression mechanism 103 Electric motor 105 Lubricating oil reservoir 108 Fixed spiral blade part 109 Compression working space 112 Rotating spiral blade part 113 Rotation restraining part 114 Rotating drive shaft 116 Drive shaft 117 Main shaft 140 Pump body 142 Oil introduction pipe 144 Oil supply passage

Claims (3)

[Claims] 1. A driving force of a motor for changing the number of rotations is transmitted into a closed container, wherein a fixed spiral blade component, a swirling spiral component meshing with the fixed spiral blade component to form a plurality of compression working spaces, and a rotating speed variable. A pump having a drive mechanism, a bearing component for supporting one end of the drive shaft, and a rotation restricting component for preventing rotation of the swirling spiral blade component and performing only rotation and a compression mechanism, and a pump having an oil introduction pipe. Is rotatably mounted on the end of the drive shaft opposite to the bearing component side, and the discharge port of the pump communicates with an oil supply passage provided at the center of the drive shaft, and the bearing is connected via the oil supply passage. A scroll compressor in which a lubrication path for lubricating parts is formed, and a flow resistance of the oil introduction pipe is larger than a flow resistance of the lubrication path. 2. A driving force of a motor for changing the number of rotations, wherein a fixed spiral blade component, a swirling spiral component that meshes with the fixed spiral blade component to form a plurality of compression working spaces, and a rotating speed variable motor are transmitted into the closed container. A pump having a drive mechanism, a bearing component for supporting one end of the drive shaft, and a rotation restricting component for preventing rotation of the swirling spiral blade component and performing only rotation and a compression mechanism, and a pump having an oil introduction pipe. Is rotatably mounted on the end of the drive shaft opposite to the bearing component side, and the discharge port of the pump communicates with an oil supply passage provided at the center of the drive shaft, and the flow resistance of the oil introduction pipe is Is larger than the flow resistance of the oil supply passage. 3. The scroll compressor according to claim 2, wherein the diameter of the oil introduction pipe is smaller than the diameter of the oil supply passage.