CN103062137A

CN103062137A - ZKDG-series resistance-expanding multi-cavity resonance type ventilator silencer

Info

Publication number: CN103062137A
Application number: CN201210245859XA
Authority: CN
Inventors: 刘凡岩
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-08
Filing date: 2012-07-08
Publication date: 2013-04-24

Abstract

In reality, motor noise and ventilator structure noise are overlapped to cause the problem that an existing mining flame-proof type press-in type contra-rotating axial-flow local fan is high in noise, and therefore the effect that noise of a ventilator is controlled under 85 db only through damping materials between an inner air barrel and an outer air barrel of a ventilator body for noise elimination is unpractical. Even if traditional barrel type silencers are added at an inlet and an outlet of the ventilator, the noise is far larger than 85 db after repeated tests. In order to reduce the noise of the ventilator to be under 85 db really, the invention provides a ZKDG-series resistance-expanding multi-cavity resonance type ventilator silencer. After repeated tests, when the silencer is applied to the ventilator, the noise is reduced by 7-30 db, the purpose that the noise of the ventilator is not larger than 85 db is achieved, the problems that in the traditional silencer, air volume and efficiency and the like of the ventilator are lowered to reduce noise of the ventilator are solved at the same time, air volume of the ventilator is increased, efficiency is improved by 3-6%, and an efficiency curve running area is wider and smoother.

Description

Multi-cavity resonance type ventilator silencing apparatus is expanded in the resistance of ZKDG series

Preface: I am coal mine working 14 years, after be engaged in so far again the manufacturing of explosion-proof type press in type disrotatory axial flow local ventilating fan for mine from 2000.Know very well air-blower noise large, and mine safety production bring harm physically and mentally healthy to colliery digging one line worker, so the noise elimination problem of ventilator has become my for many years emphasis of discussion always.From reality, present explosion-proof type press in type disrotatory axial flow local ventilating fan for mine in usefulness, although between the inside and outside air duct of blower fan body filling sound absorbing material, but because the motor that motor producer dispatches from the factory is according to JB-T---the regulation of 2004 " Flame-Proof Three-Phase Induction Motors technical specifications " the 5th part, when synchronous speed was 3000rpm, the 4kW noise of motor was 77dB; 5.5kW, the 7.5kW noise of motor is 80dB; 11kW, 15kW, 18.5kW noise of motor are 86dB; The 22kW noise of motor is 89dB; 30Kw, 37kW, 45kW noise of motor are 92dB; The 55kW noise of motor is 93dB.Owing to the problem of ventilator structure itself, make distinguished and admirable flow velocity uneven in addition, fan blade rotates and causes distinguished and admirable pulse, and because before and after the axial flow rotary blower fan grade of impeller rotated the problems such as eddy current that cause relatively, all is the renewable source of air-blower noise.Facts have proved that the noise that noise of motor and ventilator structure produce is superimposed, only depend on the sound absorbing material between this inside and outside air duct of ventilator to eliminate the noise, be to be difficult to the noise of ventilator is controlled at below the 85dB, even can be described as unpractical.Even if add traditional drum type silencing apparatus in the ventilator import and export, also be far longer than 85dB through repeatedly testing.For air-blower noise is really dropped to below the 85dB, my innovation and creation the ZKDG resistance expand multi-cavity resonance type ventilator silencing apparatus.Test through repetition test, after ventilator uses this silencing apparatus, make the noise 7～30dB that descended, realized that air-blower noise is not more than the target call of 85dB, solved simultaneously the traditional type silencing apparatus with the air quantity of sacrificing ventilator, efficient etc., exchanged blower fan noise elimination problem for, the ventilator air quantity is increased to some extent, efficient improves 3～6%, and the efficiency curve operation area is broader mild.

1, general introduction

1.1 product using scope and characteristics

Multi-cavity resonance type ventilator silencing apparatus (hereinafter to be referred as silencing apparatus) is expanded in the resistance of ZKDG series, is the silencer of mine, tunnel developing, removing smoke and dust ventilator.

1.2 the specifications and models of silencing apparatus

Silencing apparatus comprises 9 models (design of model is main corresponding with the blower fan plane No.) at present: ZKDG № 4.0, ZKDG № 5.0, ZKDG № 5.3, ZKDG № 5.6, ZKDG № 6.0, ZKDG № 6.3, ZKDG № 6.7, ZKDG № 7.5, ZKDG № 8.0.

1.2.1 silencing apparatus model implication: Z-resistance (Buddhist nun), K-expand (cell-type), D-many (chambeies), G-resonance, the № X-plane No. corresponding with ventilator.

1.3 Environmental Conditions condition and operating conditions

A), ambient temperature is-15 °～+ 40 °;

B), envionmental humidity is not more than 90% (+25 ℃);

C), height above sea level is no more than 1000m;

D), without sharp pounding and corrosive gas etc.;

E), be installed in the mine intake of methane gas explosion risk and other uses in the environment of ventilator

2, structure characteristic and working principle

Silencing apparatus generally is comprised of noise elimination cavity urceolus, noise elimination cavity inner core, guide shell, the chamber dividing plate that shakes etc.Figure of description 1 is the acoustic wave filter structure schematic representation, shake chamber dividing plate, 6-guide shell, 7-flange, 8-noise elimination cavity urceolus 2 of 1-flange, 2-noise elimination cavity urceolus 1,3-noise elimination cavity inner core, 4-sound absorbing material, 5-among the figure.

Working principle: utilize the sudden change of acoustic resistance and pipeline section, change acoustic reactance, make sound wave produce reflection, interfere, increase wave length of sound, play the noise elimination effect.

Muffler shell and structure all form with Plate Welding, and the noise elimination cavity inner core is welded with perforated plate.Filling waterproof type super glass wool in interior exocoel.Guide shell is welded with perforated plate.Silencing apparatus and blower fan body, wind are chewed by flange plate and are interconnected with bolt.

3, technical feature

Silencing apparatus technical feature parameter sees attached list 1.

Important technological parameters table 1

Annotate: the parameters such as air quantity, total head, total pressure efficiency, power input to machine are with silencing apparatus the front ventilator performance parameter to be installed to compare in the table.

4, installation and notice

Silencing apparatus should be avoided collision in handling process, in order to avoid casing deformation.

Silencing apparatus is provided with supporting foot and suspension eye, both can be installed in ground, also can hang use, must safety, firm, reliable but install.

The profile installation dimension of relevant silencing apparatus is seen " Figure of description 2 ".Accompanying drawing 2 is silencing apparatus boundary dimension schematic representation corresponding with subordinate list 2 sizes, eliminate the noise spacing in the cotton steel wire internal diameter, garden, center, D3-flange 2 hole diameter, D4-flange 2 external diameters, D5-noise elimination urceolus 2 external diameters, garden, center, D6-flange 1 hole diameter, D7-flange 1 external diameter, D8-noise elimination urceolus 1 external diameter, H silencing apparatus total height, h-silencing apparatus center height, L1-silencing apparatus two supporting legs, L-silencing apparatus total length of D1-guide shell internal diameter, D2-among the figure.

Subordinate list 2 silencing apparatus installation dimension unit: mm

Plane No.	D1	D2	D3	D4	D5	D6	D7	D8	H	h	L	L1
													4.0	402	568	688	718	490	520	550	658	778	419	1000	600
5.0	502	700	820	850	590	620	650	790	910	485	1300	700
													5.3	532	750	870	900	616	646	672	840	960	510	1300	700
5.6	562	790	910	940	653	683	713	880	1000	530	1300	700
													6.0	602	850	970	1000	710	740	770	940	1060	560	1300	700
6.3	633	890	1010	1040	756	786	810	980	1100	580	1300	700
													6.7	672	950	1070	1100	818	848	872	1040	1160	610	1400	800
7.5	752	1060	1180	1210	908	938	962	1150	1270	665	1500	900
													8.0	802	1130	1250	1280	970	1000	1024	1220	1340	700	1500	900

Annotate: 1, W is the width (in the vertical plane of silencing apparatus axis) between the silencing apparatus two supporting foot bottom centre lines;

2, this silencing apparatus profile installation dimension also can be made according to the used blower fan inlets and putlets of ventilation of user flange coupling size otherwise designed.

5, the use of silencing apparatus

Chewing connection with bolt and ventilator air side and the wind of blowing when silencing apparatus uses firmly gets final product.

6, the maintenance of silencing apparatus

Silencing apparatus should regularly be cleared up 1 time with the dust of pressing wind (pressing wind pressure to be not less than 4Kg) will be attached to resonant cavity inner core surface every half a year; Should change sound absorbing material 1 time every year.

Cleaning dust and to change the step of sound absorbing material as follows: with

silencer chamber urceolus

1,2 and the silencing apparatus two ends unclamp with the guide shell coupling bolt, extracting guide shell out is that available pressure wind is cleared up the resonant cavity surface dirt; Extracting silencing apparatus urceolus 1 out is replaceable sound absorbing material.

7, transportation and storage

1, the silencing apparatus means of transportation is not limit, and makes moist with sound absorbing material but should prevent from drenching with rain in transportation process;

Air ventilation is answered in the place of 2, storing silencing apparatus.Prevent from making moist and corroding.

8, notice

1, must check before, ventilator rear in the silencing apparatus installation turns round, forbid its inside that foreign matter is arranged;

Forbid foreign matter to enter in blower fan or the silencing apparatus when 2, ventilator turns round;

3, when turning round, forbids by ventilator the dismounting silencing apparatus.

Claims

1.ZKDG multi-cavity resonance type ventilator silencing apparatus is expanded in the series resistance, its technical characteristics is that muffler shell and structure all form with Plate Welding, and the noise elimination cavity inner core is welded with perforated plate.Filling waterproof type super glass wool in interior exocoel.Guide shell is welded with perforated plate.Silencing apparatus and blower fan body, wind are chewed by flange plate and are interconnected with bolt.