Oil-free air compressor

A technology of air compressors and compressors, which is applied in the direction of rotary piston machinery, mechanical equipment, machines/engines, etc., can solve the problems of no consideration, lubricating oil infiltration, etc., and achieve the effect of reducing danger

Active Publication Date: 2016-08-03
HITACHI IND EQUIP SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In addition, in the above-mentioned Patent Document 1, when the operation of the compressor is stopped, the problem of preventing the lubricating oil from the oil supply path for supplying oil to the motor bearing of the motor for driving the compressor from seeping into the motor chamber side is not considered.

Method used

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Embodiment 1

[0055] use Figure 1 to Figure 5 Example 1 of the present invention will be described. In this embodiment, an oil-free screw compressor will be described as an example of an oil-free air compressor (that is, an oil-free air compressor). In addition, in Figure 1 to Figure 5 In , the parts attached with the same reference numerals represent the same or corresponding parts.

[0056] figure 1 is a diagram illustrating the oil supply system of Embodiment 1 of the present invention, using the figure 1 The overall structure of this embodiment will be described.

[0057] exist figure 1 Among them, 1 is the main body of the compressor, and in the main body 1 of the compressor, a pair of male and female screw rotors (rotors) 2 (2A: male rotor, 2B: female rotor) engage to form a compression chamber 1a. In addition, the above-mentioned screw rotor (screw rotor) 2 is driven by the motor 3 via the motor shaft 4 and the compressor gear 5 (5A: drive gear, 5B: driven gear) to compress air...

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Abstract

PROBLEM TO BE SOLVED: To simplify an oil supply passage to a bearing or a gear from an oil header, and to reduce the risk of intrusion of lubricating oil in the oil supply passage into a motor room side or a compressor room side when stopping the operation of a compressor.SOLUTION: An oil-free type air compressor includes a compressor body having a rotor forming a compression chamber, a compressor bearing for supporting the rotor shaft of a rotor, a motor 3 for driving the rotor, a motor bearing 15 for supporting the motor shaft 4 of the motor, a compressor gear 5 for transmitting the rotation of the motor shaft to the rotor shaft, a gear case 22 for accommodating the compressor gear, and lubricating oil supply passages 36, 37 having an oil header 27 for supplying lubricating oil to the compressor bearing, the motor bearing, and the compressor gear. The oil header is provided above the compressor bearing, the motor bearing, and the compressor gear, and an opening part in the oil header of the lubricating oil supply passage from the oil header to the motor bearing is arranged above the opening part in the oil header of the lubricating oil passage from the oil header to the compressor gear.

Description

technical field [0001] The present invention relates to an oil-free air compressor (that is, an oil-free air compressor) that prevents lubricating oil from infiltrating into a compression chamber and supplies oil-free compressed air, and is especially suitable for an oil-free screw compressor (screw compressor). . Background technique [0002] In an oil-free screw-type, tooth-type, or Roots-type air compressor, it is necessary to be in an oil-free state in which oil does not enter the compression chamber. However, in a compressor provided with compressor bearings supporting a rotor forming a compression chamber and / or compressor gears and timing gears for driving the rotors, it is necessary to supply lubricating oil to these bearings and gears. Therefore, it is necessary to prevent the lubricating oil supplied to the compressor bearings, gears, etc. from penetrating into the compression chamber. [0003] In the oil-free air compressor (oil-free screw compressor) described ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C29/02F04C18/16F04C23/02
Inventor 森田谦次田中英晴
Owner HITACHI IND EQUIP SYST CO LTD
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