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Blower

A blower and engine technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve the problems of increased power consumption of driving motors, difficulty in using marine engines, etc., and achieve the effect of suppressing power consumption

Pending Publication Date: 2022-03-18
OSAKA BLOWER MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Therefore, there are problems in the conventional blower, such as the problem of increased power consumption of the drive motor that drives the seal air supply source, or the problem that it is difficult to use the EGR blower for a marine engine installed in a ship.

Method used

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Embodiment Construction

[0041] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0042] (one embodiment)

[0043] Figures 1 to 4B A case where a blower according to an embodiment of the present invention is installed as an EGR blower in a power system with an EGR device is shown.

[0044] First, its configuration will be described.

[0045] Such as figure 1 As shown, the power system 100 of the present embodiment is equipped with an engine 110, a turbocharger 120, and an EGR device 130, wherein the engine 110 is a multi-cylinder large-scale two-stroke diesel engine, and the engine 110, the turbocharger 120, and the EGR device 130 are all installed in the engine room of the ship not shown.

[0046] The engine 110 is, for example, an electronically controlled high-output engine that can be used as the main engine of an ocean-going ship, and has the following structure: a fuel supply unit 102, an air supply receiver 103, and an exhaust g...

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PUM

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Abstract

A blower provided with a rotating shaft (21) inserted through a shaft hole (12) of a housing (10) in which a gas passage (11) is formed, an impeller (22) supported by the rotating shaft (21), and a sealing device (30) for sealing the shaft hole (12), the sealing device (30) comprising: a first seal ring (31) and a second seal ring (32) that surround the rotating shaft (21) in the vicinity of the shaft hole (12); a shaft seal case (33) surrounding the first seal ring (31) and the second seal ring (32); a static pressure gas seal unit (40) that forms a main seal chamber (42) in the shaft seal case (33), into which seal air having a higher pressure than the inside of the gas passage (11) is introduced, so as to prevent the exhaust gas from leaking from the gas passage (11) to the atmosphere side; and a backup seal unit (60) that has an annular third seal ring (61) that surrounds the rotating shaft (21) on the outside in the axial direction with respect to the shaft seal case (33), and that forms an auxiliary seal chamber (62) that restricts leakage of seal air from the atmosphere side of the main seal chamber (42).

Description

technical field [0001] The present invention relates to blowers, in particular to blowers suitable for exhaust gas recirculation systems of large engines. Background technique [0002] As blowers that inhale and pressurize the gas to be blown, conventionally known are: a recirculation blower that boosts the pressure of exhaust gas discharged from a system that outputs power or power and recirculates it to the system, and a recirculation blower that supplies it to the system Auxiliary blower for boosting the system's supply gas (including low-pressure recirculation gas), etc. [0003] For example, as one of the exhaust emission reduction technologies for engines such as marine diesel engines, a part of the exhaust gas of the engine is returned to the intake side of the engine (referring to its supply side in the case of scavenging) and recirculated to An EGR system (exhaust gas recirculation system) that reduces NOx (nitrogen oxides) in exhaust gas has become popular, and in...

Claims

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Application Information

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IPC IPC(8): F04D25/04F04D29/12F02M26/34
CPCF04D25/045F04D29/122F02M26/34F16J15/40F16J15/34F04D29/08F04D25/08F04D29/12F16J15/3452
Inventor 坂田和夫奥野薫木下龙男
Owner OSAKA BLOWER MFG CO LTD