CN205044748U - Transition wind channel - Google Patents

Abstract

The utility model provides a transition wind channel, characterized by: its is at least including transition wind channel urceolus (2), a fan section of thick bamboo (3), resistance cabinet (4), the one end and a fan section of thick bamboo (3) the sealing connection at transition wind channel urceolus (2) both ends, and the other end is connected with resistance cabinet (4), and the appearance of transition wind channel urceolus (2) and a fan section of thick bamboo (3) link is by the appearance decision of a fan section of thick bamboo (3), and the appearance of transition wind channel urceolus (2) and resistance cabinet (4) link is decided by the appearance of resistance cabinet (4), fixing one inner tube (1) at transition wind channel urceolus (2) inner chamber, having bottom (6) of a water conservancy diversion cone in inner tube (1), the entry of bottom (6) of water conservancy diversion cone, inner tube (1) enter the mouth and the external diameter of transition wind channel urceolus (2) forms the concentric circles. This kind of transition wind channel air inlet end wind speed is even, convenient to use.

Description

A kind of transition air channel

Technical field

The utility model relates to the braking resistor heat dissipation technology of diesel locomotive, provides a kind of transition air channel especially.

Background technology

Transition air channel is the important composition parts of forced-air braking resistor, and between resistor box and blower fan cylinder, its function is: 1, connecting fan cylinder and resistor box; 2, be meet resistor box entrance square by air channel by ring-type transition; 3, the even wind-engaging of resistor box is made.

One end, two ends, transition air channel is circular, and one end is square, air intake connecting fan cylinder, is circle, and outlet air end contact resistance cabinet, for square.

The blower fan cylinder be connected with transition air channel air intake is because there is wind impeller boss to exist, so air-out region is circular, determining wind speed in this circle ring area by fan blade characteristic is not well-distributed, but along the ascending distribution of radial direction.

The wind speed profile of transition air channel air intake, the wind speed near outer ring is large, and little near the wind speed of inner ring, and central area is calm, and such wind speed profile is unfavorable for the even wind-engaging of resistor box inside brake resistance.

Summary of the invention

The purpose of this utility model is to provide one can make the uniform transition air channel of transition air channel air intake wind speed.

The technical solution of the utility model is to provide a kind of transition air channel, it is characterized in that: which comprises at least transition air channel urceolus, blower fan cylinder, resistor box, one end and the blower fan cylinder at urceolus two ends, transition air channel are tightly connected, the other end is connected with resistor box, transition air channel urceolus and blower fan cylinder coupling end profile are determined by the profile of blower fan cylinder, and transition air channel urceolus and resistor box coupling end profile are determined by the profile of resistor box; Outside transition air channel, tube inner chamber fixes an inner core, has the bottom of a guiding cone in inner core, and the external diameter of the entrance of the bottom of guiding cone, inner core entrance and transition air channel urceolus forms concentric circles.

Described inner core outlet is evenly embedded in the urceolus cavity of transition air channel.

The bottom of described guiding cone is centered at the center of inner core outlet.

The utility model has the advantages that: the utility model provides a kind of transition air channel, 1, to design air channel by ring-type transition be square transition air channel; 2, provide a kind of input data few, calculate simple transition air channel method of calculating; 3, than simple area frame work, this method of calculating is more accurate.

Below in conjunction with embodiment accompanying drawing, the utility model is described further.

Accompanying drawing explanation

Fig. 1 transition air channel position view;

Fig. 2 transition air channel schematic diagram;

Fig. 3 blower fan air-out distribution signal;

The oad signal of Fig. 4 transition air channel;

The air intake signal of Fig. 5 transition air channel;

The outlet air end signal of Fig. 6 transition air channel.

In figure, 1, inner core; 2, transition air channel urceolus; 3, blower fan cylinder; 4, resistor box; 5, transition air channel air intake; 6, the bottom of guiding cone; 7, wind impeller boss; 8, transition air channel outlet air end.

Detailed description of the invention

The utility model as shown in Figure 4, a kind of transition air channel is provided, it is characterized in that: which comprises at least transition air channel urceolus 2, blower fan cylinder 3, resistor box 4, one end and the blower fan cylinder 3 at urceolus 2 two ends, transition air channel are tightly connected, the other end is connected with resistor box 4, transition air channel urceolus 2 and blower fan cylinder 3 coupling end profile are determined by the profile of blower fan cylinder 3, and transition air channel urceolus 2 and resistor box 4 coupling end profile are determined by the profile of resistor box 4; In transition air channel, urceolus 2 inner chamber fixes an inner core 1, has the bottom 6 of a guiding cone in inner core 1, makes the external diameter of bottom 6 entrance of guiding cone, inner core 1 entrance and transition air channel urceolus 2 form concentric circles; Inner core 1 export evenly be embedded in transition air channel urceolus 2 cavity in, the bottom of the bottom 6 of guiding cone is centered at the center that inner core 1 exports.

Described inner core 1 entry radius is obtained by following formula:

According to air quantity=wind speed × area, obtain the air quantity q in air channel between wind-guiding inner core and wind impeller boss 7 _{inner ring},

Wherein, r _ringfor wind-guiding inner core longitudinal plane of symmetry radius;

Obtain air quantity q total in transition air channel _always,

By

Simplify to obtain the entry radius of inner core 1:

In formula, R is transition air channel air intake 5 urceolus radius, and r is the bottom radius of the bottom 6 of guiding cone.

As shown in Figure 5, R is transition air channel air intake 5 urceolus radius to transition air channel air intake 5, is determined by blower fan cylinder 3; R is the bottom radius of the bottom 6 of guiding cone, is determined by wind impeller boss 7; R ring is inner core 1 radius, and the selected of r ring is determined by air intake wind speed profile.

As shown in Figure 6, transition air channel urceolus 2 and resistor box 4 connection diagram, the longitudinal size H of transition air channel urceolus 2 is identical with lateral dimension with the longitudinal size of resistor box 4 with lateral dimension L, transition air channel outlet air end 8 and resistor box 4 interface of transition air channel urceolus 2 connect, air quantity is divided into two parts by inner core 1, enters resistor box 4 uniformly.

Air intake is equally divided into two parts at air intake, so outlet air end design, as long as meet inner core 1 inner area to equal area between inner/outer tube.

HL＝2hl；(5)

$\frac{H}{L}=\frac{h}{l}---\left(6\right)$

Two formula simultaneous above, the high h of inner core 1 and wide l can be tried to achieve:

$h=\frac{\sqrt{2}}{2}H---\left(7\right)$

$l=\frac{\sqrt{2}}{2}L---\left(8\right).$

Principle of work of the present utility model is: because transition air channel profile is by urceolus air intake radius, outlet air end height and width, inner core air intake radius, outlet air end height and width, and overall length determines.Urceolus air intake radius, outlet air end height and width are determined by blower fan cylinder 3 radius and resistor box 4 height and width.Inner core air intake radius is obtained by bringing axial fan hub 7 radius r and blower fan cylinder 3 radius R into formulae discovery.Bring high for resistor box 4 H and wide L into height and width that formulae discovery obtains inner core outlet air end respectively.By determining urceolus air intake radius, outlet air end height and width, inner core air intake radius, outlet air end height and width, according to required air channel length, can determine transition air channel profile.

Claims (3)

1. a transition air channel, it is characterized in that: which comprises at least transition air channel urceolus (2), blower fan cylinder (3), resistor box (4), one end and the blower fan cylinder (3) at urceolus (2) two ends, transition air channel are tightly connected, the other end is connected with resistor box (4), transition air channel urceolus (2) and blower fan cylinder (3) coupling end profile are determined by the profile of blower fan cylinder (3), and transition air channel urceolus (2) and resistor box (4) coupling end profile are determined by the profile of resistor box (4); An inner core (1) is fixed at transition air channel urceolus (2) inner chamber, have the bottom (6) of a guiding cone in inner core (1), the external diameter in the entrance of the bottom (6) of guiding cone, inner core (1) entrance and transition air channel urceolus (2) forms concentric circles.

2. a kind of transition air channel according to claim 1, is characterized in that: inner core (1) outlet is evenly embedded in urceolus (2) cavity of transition air channel.

3. a kind of transition air channel according to claim 1, is characterized in that: the bottom (6) of guiding cone is centered at the center that inner core (1) exports.