SU796457A1

SU796457A1 - Triple-diffuser nozzle

Info

Publication number: SU796457A1
Application number: SU792737689A
Authority: SU
Inventors: Сергей Иванович Сергеев; Вячеслав Григорьевич Шляпин; Павел Александрович Безгласный; Олег Львович Цветков; Игорь Григорьевич Ищук; Георгий Акимович Поздняков; Юрий Николаевич Леоненко
Original assignee: Новочеркасский Ордена Трудовогокрасного Знамени Политехническийинститут Им. Серго Орджоникидзе
Priority date: 1979-03-05
Filing date: 1979-03-05
Publication date: 1981-01-15

Description

(54) ТРЕХДИФФУЗОРНЫЙ НАСАДОК(54) THREE DIFFUSER NOZZLES

1one

Изобретение относитс к горной промышленности и может быть использовано дл про .ветривани забоев подготовительных выработок , проводимых проходческими комбайнами, оборудованными пылеотсосом.The invention relates to the mining industry and can be used for winding the bottom of preparatory workings carried out by tunneling machines equipped with a dust extraction system.

Известен насадок, включаюищй корпус и щиток, установленный поперек потока с возможностью регулировани подаваемого количества воздуха 1.Known nozzles, including a housing and a shield installed across the stream with the ability to control the amount of air supplied 1.

Недостатком зтого насадка вл етс то, что он не позвол ет исключить рециркул цию воздушного потока.The disadvantage of this nozzle is that it does not eliminate the recirculation of the air flow.

Известен также трехдиффузорный насадок, включающий диффузорный цилинщ и юский корпус и направл ющие диффузоры, концентрически установленные на выходе из диффузорного цилиндрического корпуса 2}.Also known is a tri-diffuser nozzle, including a diffuser cylinder and a hull and guide diffusers concentrically mounted at the outlet of the cylindrical diffuser case 2}.

Недостатком зтого насадка вл етс отсутствие возможности регулировки объемов, жорости и направлени выбрасываемого из него воздуха, что приводит к низкой зффективности проветривани прнзабойного пространства, неполному устранению рециркул ции воздуха у нагнетательного факела и, как следствиеThe disadvantage of this nozzle is the inability to adjust the volume, air flow and direction of the air emitted from it, which leads to low efficiency of the ventilation of the bottom hole, incomplete elimination of air recirculation from the discharge torch and, as a result

ЗТОГО, - ухудщение условий выноса метана из призабойного пространства и из зоны разрушени забо .Wreckage - deterioration of the conditions for the removal of methane from the bottom hole and from the zone of destruction of the bottom.

Цель изобретени - устранение рециркул ции воздуха при .выходе из насадка за счет формировани регулируемого воздушного факела .The purpose of the invention is to eliminate air recirculation when leaving the nozzle due to the formation of an adjustable air flare.

Claims

The goal is achieved by the fact that the nozzles are provided with a threaded shaft made at one end of it, supporting sleeves fixed on the smooth part of the shaft, hub-housings placed on the threaded part of the shaft and ptcaopki, while the shaft is rigidly locked inside the diffuser of the cylindrical body along its longitudinal axis by means of spacers, one ends of which are fixed on the surface of the support sleeves, the other is fixed on the inner surface of the diffuser cylinder case, and guide diffusers are also by means of spacers, one ends of which are mountable on a surface of the hub-nut, others on the inner surface of the corresponding guide of the diffuser 379 mounted for longitudinal movement along the nozzle axis. At the same time, the forming walls of the directional diffusers are made in the form of hyperbolic curves passing into straight sections. FIG. 1 shows a tri-diffusion nozzle, view, longitudinal section; in fig. 2 Install the three-junction nozzle in the face of the com6 “§ | your development. Tri-diffuser. The 1st nozzle consists of a diffuser cylindrical body 1 connected to the discharge duct 2, guides the middle 3 and the internal 4 diffusers, threaded shaft 5, at one end of it, supported sleeves 6 mounted on the smooth part of the shaft nuts 7, placed on the threaded part of the shaft, and spacers. The shaft 5 is rigidly fixed inside the diffuser cylindrical body 1 along its longitudinal axis by means of spacers 8, one ends of which are fixed on the surface of the support sleeves 6, others - on the morning surface of the diffuser cylindrical cube, and the guide diffusers 3 and 4 are also fixed by means of spacers 8, one ends of which are fixed on the surface of the hubs of the nuts 7, others on the inner surface of the corresponding guide diffuser 3 and 4, and are mounted with the possibility of longitudinal movement axis nozzle. The nozzles are connected to the injection air duct 2 in the working-out by the combine 9, formed by the dust extraction device 10 with the suction nozzle 11. The nozzles work as follows. In the discharge air duct 2, fresh air is supplied to the body of a three-diffuser nozzle I, from which it is ejected in the form of three jets: a passive flat transverse jet 12 leaving the annular space formed by the diffuser cylindrical body 1 and the middle guide diffuser 3, an active hollow conical jet 13 emanating from the annular space between the middle 3 and the inner 4 directional diffusers and the excavation directed along the walls and roof to the face, and the internal free jet 14 emanating from Renal diffuser 4. The jet is active, ejected at a given speed into the space between the combine housing, walls and roof of the excavation, with its outer part ejecting fresh air from the passive jet, and ejection of the free stream to the inner part of the jet. Volumes in air going to the formation of a passive, active and internal free jet at a given flow rate of fresh air in the discharge duct 2 are adjusted by means of hub-nuts moving along the threaded shaft by changing the gaps between the diffuser cylindrical body 1, the middle 3 and the inner 4 guiding diffusers in such a way that the injection of the active jet is ensured only by passive and internal free jets, which, in turn, ensures the combining of the combine and the working places of the driver and his The helper is only freshly sprayed and completely eliminates the recirculation of polluted air in the area between the nozzle and the working face. The formed fresh air injection plume closes the air and air contaminated during the operation of the combine 9 with dust and methane in the space between the bottom surface and the plane of the suction inlet of the nozzle 11 of the dust extraction device 10 of the combine 9, as a result of which the suction ratio of the dust extraction device decreases to 1.0, which makes it possible a significant decrease in size, weight, energy consumption of the dust extraction device, a reduction in the levels of noise emitted by them and the preservation of the possibility of placing the dust extraction device his device to combine housing without impairing the hygienic working conditions of staff. Thus, the use of an improved tri-diffuser nozzle with diffusers coaxially placed on a common axial shaft creates the opportunity to create a fresh air discharge plume so that the conical stream is actively washing the walls, the roof in the bottom-hole part of the production and the exposed bottom surfaces, which eliminates the danger of methane accumulation and providing an optimum dust rate factor for the ventilation flow rate at the bottom surface, and the presence of a passive flat transverse and internal free jets jetted to the active jet, eliminates the phenomenon of recirculation, i.e., the occlusion of contaminated air from the bottom-hole space to the injection plume of fresh air and the ingress of dust and methane from the bottom to the area of the combine. Claim 1. Three-diffuser nozzles, including a diffuser cylindrical body and guide diffusers, are coherently installed at the exit of the diffuser cylindrical body, characterized in that, in order to eliminate recirculation