CN101435441B

CN101435441B - Mining blower silencer

Info

Publication number: CN101435441B
Application number: CN2008102444552A
Authority: CN
Inventors: 马占国; 张帆
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 2008-12-03
Filing date: 2008-12-03
Publication date: 2011-05-11
Anticipated expiration: 2028-12-03
Also published as: CN101435441A

Abstract

The invention relates to a muffler of a pressure fan for a mine. The muffler comprises a wind inlet collecting muffler, the pressure fan, a wind outlet muffler, a guide muffling cone, a supercharging and muffling cone and a sound absorption material; the guide muffling cone is eccentrically arranged; the cross section of the guide muffling cone is a circle or a dissymmetric flat circle; the supercharging and muffling cone is of a water drop shape; an inlet of the supercharging and muffling cone is large; an outlet of the supercharging and muffling cone is small; the inner walls of cylinders of the wind inlet collecting muffler and the wind outlet muffler are provided with a plurality of muffling holes circularly arraying along the direction of right spiral lines of inner cylinders of the mufflers and the direction of axial lines of the mufflers according to size; and the outer walls of the guide muffling cone and the supercharging and muffling cone are provided with a plurality of muffling holes circularly arraying along the direction of left spiral lines of cylinder walls of the muffling cones and the direction of axial lines of the muffling cones according to size, thereby realizing that the wind inlet collecting muffler and the pressure fan have equal wind flow speed on the same cross section and removing noise caused by the friction of wind flow. The muffler has simple structure, good muffling effect, small energy loss, large effective wind pressure, convenient material maintenance and replacement and wide practicality.

Description

A kind of mining blower silencer

Technical field

The present invention relates to a kind of mining blower silencer, be particularly useful for air-supply, oxygenation, the gas-removing of coal mine roadway.

Background technique

Colliery pressure fan (portable blower) is the capital equipment of coal mine roadway air-supply, oxygenation, gas-removing.Existing pressure fan normally moves noise and reaches 130 decibels, and this physical impairment to down-hole miner is bigger; Long-term work, the miner has tinnitus, dizziness, weakness of limbs, absent minded, occupation disease such as ignition for no reason easily, this phenomenon is troubling down-hole miner for a long time, can't solve always.In order to address this problem, the researcher has adopted the resistive baffler of micropore to the colliery pressure fan, as the patent No. is 89216348.8 disclosed mining portable blower silencing apparatuss, mainly adopt and on rectification noise elimination fairing, be surrounded with the screw piece that helix angle constantly changes, make the air-flow rotation reach the purpose of noise elimination, this baffler increases mode noise reductions such as resistance by sound absorption, but its complex manufacturing technology is difficult to carry out.Noise can be controlled at the 88-90 decibel in short-term, but its effective runtime only be about three months, and volume is big, material maintenance and replacement is difficult, wind loss is big.

Summary of the invention

The objective of the invention is to overcome the deficiency in the prior art, provide a kind of simple in structure, volume is little, is convenient to maintenance, and effective runtime is long, the mining blower silencer of good muffling effect.

Mining blower silencer of the present invention, comprise and be located at air intake afflux baffler and the air-out baffler that pressure fan is imported and exported two ends respectively, be provided with water conservancy diversion noise reduction awl in the air intake afflux baffler, be provided with diffusion noise reduction awl in the air-out baffler, the inner filling of the barrel interlayer of air intake afflux baffler and air-out baffler, water conservancy diversion noise reduction awl and diffusion noise reduction awl has sound absorbing material, the eccentric setting of described water conservancy diversion noise reduction awl, its cross section is circular or asymmetric oblateness; Described diffusion noise reduction awl is drops, and its ingress is big, and the outlet port is little; The tube inwall of air intake afflux baffler and air-out baffler is provided with several along baffler inner core right-hand helix direction with along the baffler axial direction bloop of cycle arrangement by size; The outer wall of water conservancy diversion noise reduction awl and diffusion noise reduction awl is provided with several along noise reduction awl barrel left hand screw line direction with along the noise reduction axis of cone line direction bloop of cycle arrangement by size; The joining end ingress of the pressured blower fan of air-out baffler is provided with the bent shell Taper Pipe in whirlpool, and the outlet end of air-out baffler is provided with the afflux Taper Pipe; The two ends of water conservancy diversion noise reduction awl and diffusion noise reduction awl are respectively equipped with the support fixation bar that is located.

Right-hand helix on the tube inwall of described air intake afflux baffler and air-out baffler is arranged with the left hand screw line dislocation that water conservancy diversion noise reduction awl and diffusion noise reduction are bored on the outer wall respectively; The air intake entrance of the bent shell Taper Pipe in described whirlpool is for making the volute of distinguished and admirable eddy current, and outlet section is the bent conical surface; The cross section of described support fixation bar is a streamline; Be laid with easy-to-dismount spun yarn net on the tube inwall of described air intake afflux baffler and air-out baffler; Be laid with easy-to-dismount spun yarn net on the outer wall of water conservancy diversion noise reduction awl and diffusion noise reduction awl; Described sound absorbing material is lightweight, do not burn, the thin cotton composite material of indeformable glass.

Mining blower silencer of the present invention, connect by parts are accurate with air intake afflux baffler, water conservancy diversion noise reduction awl, afflux Taper Pipe, the bent shell Taper Pipe in whirlpool, rear portion, air-out baffler, diffusion noise reduction awl etc., formation has a kind of integral body of natural frequency, can avoid the vibration because of relative displacement generation between parts in service.Because between the inner/outer tube of air intake afflux baffler, air-out baffler and water conservancy diversion noise reduction awl, diffusion noise reduction awl inner filling lightweight, do not burn, the thin cotton composite sound-absorbing material of indeformable glass, can strengthen erasure effect, weight reduction and reduce volume.Be provided with water conservancy diversion noise reduction awl is eccentric, air intake afflux baffler and the pressure fan distinguished and admirable speed on same cross section that can realize all equates, thus the stream noise that rubs and cause of having eliminated wind.Diffusion noise reduction awl is made the water droplet shape of special parameter, can realize that supercharging falls resistance and eliminate the function of wake flow noise, cavitation erosion.Can be with the noise long-term control below 90 decibels, it is simple in structure, and volume is little, good muffling effect, wind loss is little, and effectively blast is big, and convenient material maintenance and replacement has practicability widely.

Description of drawings

Fig. 1 is a mining blower silencer structural drawing of the present invention.

Schematic representation is arranged in Fig. 2 baffler inner tube wall of the present invention bloop spiral orientation.

Schematic representation is arranged in Fig. 3 noise reduction awl of the present invention bloop spiral orientation.

The A-A sectional view of Fig. 4 Fig. 1.

Among the figure: 1-air intake afflux baffler, 2-pressure fan, 3-air-out baffler, 4-air intake afflux baffler urceolus, 5-support fixation bar, 6-sound absorbing material, 7-air intake afflux baffler inner core, 8-water conservancy diversion noise reduction awl, the 9-otic placode, 10-bloop, 11-afflux Taper Pipe, the 12-flange, the bent shell Taper Pipe in 13-whirlpool, 14-air-out baffler urceolus, 15-bloop, 16-air-out baffler inner core, 17-diffusion noise reduction awl, 18-baffler axis, 19-baffler inner core helix, 20-noise reduction awl barrel reverse acting spiral line, 21-noise reduction axis of cone line.

Embodiment

The invention will be further described below in conjunction with the embodiment in the accompanying drawing:

Shown in Figure 1, mining blower silencer is made of the air intake afflux baffler 1 and the air-out baffler 3 that are located at pressure fan 2 import and export two ends, and air intake afflux baffler 1 and air-out baffler 3 connect with pressure fan 2 by flange respectively.Air intake afflux baffler 1 mainly is made of air intake afflux baffler urceolus 4, air intake afflux baffler inner core 7 and water conservancy diversion noise reduction awl 8, on the air intake afflux baffler urceolus 4 otic placode of being convenient to hang 9 is housed, water conservancy diversion noise reduction awl 8 eccentric settings, its cross section is circular, Fig. 4 (b), or asymmetric oblateness, Fig. 4 (a), can realize that air intake afflux baffler 1 and pressure fan 2 all equate at same cross section windward flow velocity degree, eliminate the noise that distinguished and admirable friction causes.Air-out baffler 3 mainly is made of air-out baffler urceolus 14, air-out baffler inner core 16 and diffusion noise reduction awl 17, the otic placode of being convenient to hang 9 is housed on the air-out baffler urceolus 14, diffusion noise reduction awl 17 is a drops, its ingress is big, the outlet port is little, is beneficial to realize that supercharging falls resistance and eliminate the function of wake flow noise, cavitation erosion.17 hollow inner fillings are bored in interlayer between interlayer, air-out baffler urceolus 14 and air-out baffler inner core 16 barrels between air intake afflux baffler urceolus 4 and air intake afflux baffler inner core 7 barrels, water conservancy diversion noise reduction awl 8 and diffusion noise reduction sound absorbing material 6, sound absorbing material 6 for lightweight, do not burn, the thin cotton composite material of indeformable glass.The tube of air intake afflux baffler 1 and air-out baffler 3 has several on the inwall along baffler inner core right-hand helix 19 directions with along the baffler axis 18 directions bloop 10 of cycle arrangement by size, bloop 10 geometric ratio cycle arrangement, the azimythal angle of baffler inner core right-hand helix 19 are pressed the size of the power of pressure fan 2, blade angle and are determined.As shown in Figure 2.Water conservancy diversion noise reduction awl 8 and diffusion noise reduction are bored 17 outer wall and are provided with several along noise reduction awl barrel left hand screw line 20 directions with along the noise reduction axis of cone line 21 directions bloop 15 of cycle arrangement by size, bloop 15 geometric ratio cycle arrangement, the azimythal angle of baffler inner core left hand screw line 20 are pressed the size of the power of pressure fan 2, blade angle and are determined.As shown in Figure 3.Right-hand helix 19 on the tube inwall of air intake afflux baffler 1 and air-out baffler 3 is arranged with left hand screw line 20 dislocation that water conservancy diversion noise reduction awl 8 and diffusion noise reduction are bored on 17 outer walls respectively, be that bloop 15 distribution helixes and bloop 10 distribution helixes are dislocatedly distributed, and Hand of spiral is opposite, and air intake afflux baffler 1 and water conservancy diversion noise reduction awl 8, air-out baffler 3 are cancelled out each other with the vibration that diffusion noise reduction awl 17 produces.Be laid with easy-to-dismount spun yarn net on the tube inwall of air intake afflux baffler 1 and air-out baffler 3; Be laid with easy-to-dismount spun yarn net on the outer wall of water conservancy diversion noise reduction awl 8 and diffusion noise reduction awl 17, the spun yarn net helps guaranteeing the tightness of sound absorbing material 6.The joining end ingress of air-out baffler 3 pressured blower fans 2 is provided with the bent shell Taper Pipe 13 in whirlpool, the air intake entrance of the bent shell Taper Pipe 13 in whirlpool is for making the volute of distinguished and admirable eddy current, outlet section is the bent conical surface, the distinguished and admirable rotation power consumption that pressure fan 2 is come out is minimum, and converts noise energy to promotion distinguished and admirable effective pressure along air-out baffler 3 inner chamber axial flow.The outlet end of air-out baffler 3 is provided with afflux Taper Pipe 11, and be equipped with and pipeline flange connecting 12 end of afflux Taper Pipe 11.The support fixation bar 5 that is located is equipped with at the two ends of water conservancy diversion noise reduction awl 8 and diffusion noise reduction awl 17 respectively, design and installation is carried out by the requirement of eliminating turbulent flow in its position, the cross section of support fixation bar 5 is a streamline, in order to eliminating noise and the energy loss that causes owing to rod member.

Claims

1. mining blower silencer, comprise and be located at air intake afflux baffler (1) and the air-out baffler (3) that pressure fan (2) is imported and exported two ends respectively, be provided with water conservancy diversion noise reduction awl (8) in the air intake afflux baffler (1), be provided with diffusion noise reduction awl (17) in the air-out baffler (3), the urceolus of air intake afflux baffler (1) and air-out baffler (3) and the interlayer between the inner core barrel, the inside of water conservancy diversion noise reduction awl (8) and diffusion noise reduction awl (17) all is filled with sound absorbing material (6), it is characterized in that: described water conservancy diversion noise reduction awl (8) is eccentric to be provided with, and its cross section is circular or asymmetric oblateness; Described diffusion noise reduction awl (17) is a drops, and its ingress is big, and the outlet port is little; Be equipped with several on the inner core inwall of air intake afflux baffler (1) and air-out baffler (3) along inner core right-hand helix (19) direction of described two bafflers and along axis (18) direction of described two bafflers inwall bloop (10) of cycle arrangement by size; Be equipped with several outer wall left hand screw line (20) directions of boring along described two noise reductions on the outer wall of water conservancy diversion noise reduction awl (8) and diffusion noise reduction awl (17) and along described two noise reduction axis of cone lines (21) direction outer wall bloop (15) of cycle arrangement by size; The joining end ingress of the pressured blower fan of air-out baffler (3) (2) is provided with the bent shell Taper Pipe (13) in whirlpool, and the outlet end of air-out baffler (3) is provided with afflux Taper Pipe (11); The two ends of water conservancy diversion noise reduction awl (8) are provided with the support fixation bar (5) that is located, and the two ends of diffusion noise reduction awl (17) also are provided with the support fixation bar (5) that is located.

2. mining blower silencer according to claim 1 is characterized in that: the inwall bloop (10) on described air intake afflux baffler (1) the inner core inwall is arranged with outer wall bloop (15) dislocation on water conservancy diversion noise reduction awl (8) outer wall; Inwall bloop (10) on the inner core inwall of air-out baffler (3) is arranged with outer wall bloop (15) dislocation on diffusion noise reduction awl (17) outer wall.

3. mining blower silencer according to claim 1 is characterized in that: the air intake entrance of the bent shell Taper Pipe in described whirlpool (13) is for making the volute of distinguished and admirable eddy current, and outlet section is the bent conical surface.

4. mining blower silencer according to claim 1 is characterized in that: the cross section of described support fixation bar (5) is a streamline.

5. mining blower silencer according to claim 1 is characterized in that: be laid with easy-to-dismount spun yarn net on the inner core inwall of described air intake afflux baffler (1) and air-out baffler (3); Be laid with easy-to-dismount spun yarn net on the outer wall of water conservancy diversion noise reduction awl (8) and diffusion noise reduction awl (17).

6. mining blower silencer according to claim 1 is characterized in that: described sound absorbing material (6) is lightweight, do not burn, the thin cotton composite material of indeformable glass.