JPH01211678A - Rotary compressor - Google Patents

Abstract

PURPOSE:To eliminate the use of a vane and prevent both noise and vibration by mounting rollers around a rotor which is driven to turn inside a casing and winding a seal belt on the rollers. CONSTITUTION:Main rollers 11 and 12 are turnably mounted at the opposed positions on the center line of a rotor 6 which is driven to turn in the middle of a casing 1. A plurality of driven rollers 15 and 16 are turnably placed on both sides of said center line. A seal belt 17 is wound on those main and driven rollers. The longitudinally opposed ends of the seal belt 17 are fastened to the casing 1. The use of a vane including a problem in the light of the strength may be eliminated and both the noise and the vibration be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a small rotary compressor, Tuna, which is used as a compressor for, for example, a refrigeration cycle.

[Prior Art] In recent years, rotary vane compressors have been widely used as compact, lightweight, and highly efficient compressors. This is composed of a casing, a rotor, and a vane. The casing is provided with a gas inlet and an outlet, and the rotor is eccentrically supported in the casing. A vane is inserted, and the vane rotates while contacting the inner wall of the casing due to centrifugal force. When the rotor rotates, gas is sucked into the compression chamber from the suction port, gradually increases in pressure, and is finally discharged from the discharge port. It is structured as follows.

[Problems to be Solved by the Invention] In the above conventional technology, the vanes are subjected to various forces such as bending, compression, and friction, and the rotor rotates in an eccentric position, resulting in strength problems. There were also problems with noise and vibration.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a rotary compressor that can omit the use of vanes that have strength problems and can prevent noise and vibration.

[Means for Solving the Problems] The rotary compressor of the present invention has main rollers at both ends on the center line of the rotor that is rotationally driven at the center within the casing.
A plurality of slave rollers are rotatably provided on both sides of the center line, and a seal belt is hung on the main and slave rollers, and both lengthwise ends of the seal belt are fixed to the casing. Constructed by sealing both widthwise ends to the inner wall of the casing.

[Function] With the above configuration, a part of the seal belt is brought into sliding contact with the inner wall surface of the casing via the main roller due to the rotary drive of the rotor, and a compression gap is formed between each main roller, and when the rotor rotates and covers the seal belt, gas is released. It is inhaled through the suction port until it is fully compressed, the pressure is gradually increased, and then it is discharged from the discharge port.

U example] Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 4, reference numeral 1 denotes a casing constituting a low-rise seedling 2 consisting of a cylindrical portion 2A and a rectangular cylindrical portion 2B that communicate with each other. The body 3 is fastened and fixed. 4 and 5 are located at the bottom of both sides of the casing 1 and are connected to the cylindrical portion 2 of the rotor chamber 2.
A: A suction port and a discharge port are provided to communicate with both ends. A rotor 6 is located at the center of the cylindrical portion 2A of the rotor chamber 2 and is rotatably driven. It is pivotally attached to a provided drive shaft 8 , and a DC motor 10 is connected to this drive shaft 8 via a coupling 9 . 11. i2 is a main roller group rotatably provided at both ends of the center line QI of the rotor 6 via a 7 flange 13 and a support shaft 14, and each main roller group 11. row roller 11
A, 113.11C, 12A, 12B.

12G, and the intermediate roller 113.12B is configured to have a smaller diameter than the other rollers 11A, 11C, 12A, and 12C. Reference numeral 15.18 denotes a group of follower rollers rotatably provided on both sides of the periphery of the center line Q1 of the rotor 6 via a flange 13 and a support shaft 14, and each follower roller group 15
．． i6 is formed to have a smaller diameter than the main roller group 11.12, and is pivoted on the same circumferential line Q2 inwardly from the pivot position of the main roller group 11.12. Each of the slave roller groups 15 and 16 includes three rows of rollers 15A in the axial direction of the rotor 6.
, 15B, 15C, 16A, 16B, and 16C, and the intermediate rollers 15B and 16B are the other rollers 15.
It has a smaller diameter than A, 15C, 16A, and 16C. 17 is a seal belt made of synthetic rubber;
The seal bells 1 to 17 are attached to the rollers on the half circumference of the rotor 6, and both ends thereof are fixed to the inner circumferential wall of the rectangular tube portion 2B of the rotor chamber 2 by fastening members 18. It is configured to come into sliding contact with the inner circumferential wall surface of the rotor chamber 2. As shown in FIG. 4, this seal belt 17 has a protrusion 19 at the center of its inner surface, and this protrusion 19 is connected to the intermediate rollers 11B and 12B having a small diameter.

15B, 16B in a fitted state to function as a positioning guide. Further, the width of the seal belt 17 is formed to match the width dimension of the rotor chamber 2, and a lip portion 21 having an oil reservoir 20 is formed at both ends in the width direction. 22.

23 is a stepped portion that guides the oil seal portion 22 of the seal belt 17. 24 is a seal belt 17 and a rotor chamber 2 which are in sliding contact with the inner peripheral surface of the rotor chamber 2 via main roller groups 11 and 12.
An IC compression chamber is formed between the inner peripheral surface and the inner peripheral surface.

= 6 − Then, as shown in FIGS. 5 to 7, the DC motor 10
When the rotor 6 is driven to rotate in the direction of the arrow at the center of the casing 1, as shown in FIG. When the main roller group 12 begins to bring the seal belt 17 into sliding contact with the suction port 4, gas is sucked into the compression chamber 24 from the suction port 4, and then as the rotor 6 rotates, the pressure gradually increases as shown in FIG. When the main roller group 11 passes through the discharge port 5 as shown in FIG. 7, the gas in the compressor 24 is discharged from the discharge port 5. When the rotor 6 is rotated in the opposite direction, suction and exhaust are performed in the opposite direction.

In this way, in the above embodiment, the casing 1 is used instead of the vane, which is subjected to various forces such as bending, compression, and friction.
A main rotor 6 and a sub-row group 11.
12, 15, and 16 are provided, and a seal belt 17 is hung, and the seal belt 17 is in sliding contact with the inner circumferential wall surface of the rotor chamber 2 via the main roller group 11.12, thereby forming the compression chamber 24. Therefore, the strength problem is solved, and the rotor 6 can be placed at the center of the casing 1.
In addition, the compression chamber 24 can be formed by the rotation of the rotor 6, which causes vibration.

Noise can be prevented. Further, the seal belt 17 has a protrusion 19, and this protrusion 19 is connected to the intermediate roller 11B,
123, 153, and 1613 in a fitted state, and the compression chamber 24 is formed by the oil seal portion 22, so that stable operation is possible. And when the rotation speed of rotor 6 is 4000 rpn+, the pressure is 2 k.
g/d, flow rate 30Q/l1lin, and noise 60
A result of 45 dB or less was obtained at Cl1ll.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, the dimensions of the main roller and the slave roller, the number of slave rollers, and the seal structure of the seal belt may be selected as appropriate.

[Effects of the Invention] The present invention provides strength by providing a roller on the rotor that is rotatably driven at the center of the casing, attaching a seal belt to the roller, and fixing both ends of the seal belt to the casing. It is possible to provide a rotary compressor that can omit the use of problematic vanes and prevent noise and vibration.

[Brief explanation of the drawing]

1 to 7 show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a sectional view taken along line B-- 4 is an enlarged sectional view of the seal belt, and FIGS. 5 to 7 are sectional views showing the operating state. 1...Casing 6...Rotor 11, 12...Main roller group (main roller) 15, 16...
...Following roller group (following roller) 17...Seal belt -〇-24...Compression chamber patent applicant OV-Nis Engineering Co., Ltd.

Claims (1)

[Claims] Main rollers are rotatably provided at both ends of the center line of a rotor that is rotationally driven at the center within the casing, and a plurality of follower rollers having a smaller diameter than the main roller are rotatably provided on both sides of the center line of the rotor, and the A seal belt is hung around main and slave rollers provided on at least half the circumference of the rotor, and both longitudinal ends of the seal belt are fixed to the inner wall of the casing, and both widthwise ends of the seal belt are fixed to the inner wall of the casing. A rotary compressor characterized in that a compression chamber is formed between each of the main rollers by sealing the inner wall surface of the casing and causing a seal belt to slide into contact with the inner wall surface of the casing via the main roller by rotation of the rotor.