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Air source device for rail vehicle, air supply system and self-cleaning method of air supply system

A rail vehicle, self-cleaning technology, applied in the field of rail transit, can solve problems such as increased leakage, reduced service life, insufficient air supply, etc., to achieve the effect of preventing emulsification and improving stability

Pending Publication Date: 2021-04-30
CHINA ACADEMY OF RAILWAY SCI CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. For the lubricating oil that has been emulsified, the current scheme enters the compressor without drying, and the absorption speed of the moisture in the lubricating oil is slow. It is not suitable to eliminate the emulsification through the dry running mode. The pipeline valve (or air cylinder valve) exhausts externally, starts the air source device after reducing the total air pressure, and continuously operates in the normal air supply mode to eliminate the emulsification problem. The operation is cumbersome, and the normal air supply mode exhausts The noise is loud during the weather, which affects the normal work of other staff;
[0005] 3. When the air source device is self-cleaning, the amount of air discharged to the outside is relatively large, and a certain amount of noise will also be generated
[0006] Therefore, in order to eliminate the adverse effects caused by lubricating oil emulsification, the reciprocating piston oil-free air source device has gradually been applied in the field of rail transit in recent years, although the reciprocating piston oil-free air source device has fundamentally solved the occurrence of lubricating oil emulsification. , but if the working rate of the air source device is insufficient and liquid water is precipitated, there is still a big hidden danger to the stable operation of the air source device: when liquid water is precipitated, the self-lubricating piston in the reciprocating piston oil-free air source device The powder produced by the friction between the ring and the cylinder wall of the piston cannot be discharged in time, and it is bonded with water and attached to the cylinder wall of the piston. During the working process of the air source device, these dust particles will scratch the cylinder wall and / or piston ring, damage the The friction and wear environment between the original self-lubricating piston ring and the cylinder wall leads to increased leakage, insufficient air supply, and reduced service life
[0007] Aiming at the problem of poor use effect and easy damage of the wind source device for rail vehicles in the related technology, no effective solution has been given so far

Method used

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  • Air source device for rail vehicle, air supply system and self-cleaning method of air supply system
  • Air source device for rail vehicle, air supply system and self-cleaning method of air supply system
  • Air source device for rail vehicle, air supply system and self-cleaning method of air supply system

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Embodiment approach 1

[0081] Such as Figure 1 to Figure 3 As shown, the present invention provides an air source device for a rail vehicle, which includes an air intake valve 1 and an unloading valve 2, wherein: the unloading valve 2 includes an unloading valve body 201, and the unloading valve body 201 is used for unloading. A first chamber 2011 is formed inside the valve body 201, and a first air inlet 2013 and a first air outlet 2014 connected to each other are opened on the unloading valve body 201 above the first chamber 2011. A chamber 2011 is provided with a spool 202 that can move up and down, and the spool 202 can move up between the first air inlet 2013 and the first air outlet 2014 to align the first air inlet 2013 with the first air outlet. 2014 for blocking, unloading valve body 201 is also provided with a valve core position adjustment port 2012, the high-pressure air into the valve core position adjustment port 2012 can push the valve core 202 to move downward, so that the first air...

Embodiment approach 2

[0113] The present invention provides an air supply system for rail vehicles, the air supply system for rail vehicles includes two above-mentioned air source devices for rail vehicles, and the two air source devices for rail vehicles are both arranged in the rail vehicles. The two air source devices for rail vehicles can work alternately as the main air source device and the auxiliary air source device respectively (that is, on an odd working day, one rail vehicle air source device operates as the main air source device, and the other rail vehicle Use the wind source device as the auxiliary wind source device for backup; on even-number working days, the two rail vehicles use the wind source device interchangeably).

[0114] The characteristics and advantages of the rail vehicle air supply system of the present invention are:

[0115] 1. The air supply system for rail vehicles compresses the air through the cooperation of two air source devices for rail vehicles, and supplies a...

Embodiment approach 3

[0118] The present invention provides a method for cleaning rail vehicles with wind source. The method for cleaning rail vehicles with wind source is suitable for the air supply system for rail vehicles in Embodiment 2. The method for cleaning rail vehicles with wind source includes the following steps :

[0119] Step S1: Confirm whether the air source devices for the two rail vehicles are in normal working condition on that day. If the two rail vehicle air source devices are in normal working condition, only the main air source device is allowed to enter the cleaning state; if the main air source device fails, the auxiliary air source device is allowed to enter the self-cleaning state;

[0120] Step S2: Monitor the total wind pressure in the vehicle's total wind pipeline in real time, and compare the total wind pressure with the preset first total wind pressure P 11 For comparison, if the total wind pressure in the vehicle total air pipeline is less than the first total wind...

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Abstract

The invention relates to an air source device for a rail vehicle, an air supply system and a self-cleaning method of the air supply system. The air source device for the rail vehicle can increase the temperature of lubricating oil in a compressor so as to reduce the risk of lubricating oil emulsification when air does not need to be supplied to the vehicle. Besides, high-pressure air with solid particles, oil and water filtered by an air drying and purifying device can return into the compressor to participate in the compression process, and therefore water separated out of the lubricating oil is rapidly taken away, lubricating oil emulsification is further prevented, and the stability of the compressor is improved. The technical problems that an air source device for a rail vehicle is poor in using effect and prone to damage are solved.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to an air source device for rail vehicles, an air supply system and a self-cleaning method thereof. Background technique [0002] At present, rail vehicles usually use the air source device to increase the oil temperature in the idle mode, but do not supply air to the downstream to heat the lubricating oil in the compressor, thereby avoiding the emulsification of the lubricating oil. However, only when the vehicle is activated and has a zero-speed signal every day, the air source device will be activated to enter the idle running mode for 30 minutes, and then shut down; if there are no other vehicles activated and zero-speed signals on the day, the air source device will no longer enter the idle running mode on that day model. There is following shortcoming in the mode that this prevents lubricating oil emulsification: [0003] 1. In the existing scheme, in the idling running...

Claims

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Application Information

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IPC IPC(8): F04B37/12F04B39/00F04B39/02F04B39/06F04B39/16F04B39/12F04B49/06F04B49/22
CPCF04B37/12F04B39/00F04B39/0207F04B39/0284F04B39/06F04B39/123F04B39/16F04B49/06F04B49/22
Inventor 孔德帅金哲宫明兴孙正军裴正武张建海
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD