CN203702561U - Energy-saving and air-supplying device for Roots blower - Google Patents

Abstract

The utility model relates to an energy-saving and air-supplying device for a Roots blower. The energy-saving and wind-supplying device comprises the Roots blower and air-supplying pipelines, wherein the Roots blower and the air-supplying pipelines are connected with one another. The energy-saving and wind-supplying device is characterized in that a big air-supplying pipe and a small air-supplying pipe are arranged on the energy-saving and wind-supplying device; an insertion opening is formed in the side wall of the big air-supplying pipe; the small air-supplying pipe is inserted inside the big air-supplying pipe through the insertion opening; the axis of an air discharge pipe of the small air-supplying pipe which is inserted inside the big air-supplying pipe is parallel to the axis of the big air-supplying pipe. According to the structure of the utility model, the energy-saving and air-supplying device has the advantages that the structure is reasonable, energy is saved, the production efficiency is increased, and the blast capacity can be increased according to needs.

Description

The energy-conservation air supply device of roots blower

Technical field

The utility model relates to air machinery field, specifically a kind of energy-conservation air supply device of the roots blower that improves air quantity, energy saving.

Background technique

Ventilator is the large and wide universal machine of a kind of application quantity, be widely used in national economy field and even the national defense construction such as industrial boiler, power station, metallurgy, sewage treatment, mine, tunnel, air conditioning, industrial ventilation, dust pelletizing system, therefore Fan Energy-saving has very important economic implications, and has caused national attention.

At present, middle-size and small-size iron-smelting furnace, cupola all needs roots blower air-supply, it is higher than high pressure centrifugal ventilator blast with it, stable performance and use the advantage such as reliable and become the key equipment of metallurgical and foundry, roots blower is volume rotary blower, roots blower divides horizontal and vertical two kinds, horizontal roots blower, gradually to open kidney-shaped rotor (hollow or solid) by two, long-round-shape casing, two parallel axes compositions, casing can be divided into water-cooled, air cooling and do not establish cooling unit three classes, driving mechanism is, at the same end of diaxon, style and big or small identical is housed, and intermeshing two gears, driving shaft is directly connected with motor, and make driven shaft do rightabout rotation by gear driven.Each rotor one week, can squeeze the air of twice shade volume, thereby driving shaft often rotates a circle and just squeezes the air of 4 times of shade volumes.Roots blower inlet/outlet is reasonably arranged and be should be: upper end air intake lower end air draft (for horizontal), and can utilize like this pressurized gas to offset the gravity of a part of rotor and axle, reduce bearing pressure, reduce wear.Its maximum feature is that, in the time that pressure is regulated in allowed band, changes in flow rate is very micro-; The range of choice of pressure is also very wide, has the feature of forcing gas transmission, and fed sheet of a media is oil-containing not; Simple in structure, easy to maintenance, long service life, complete machine oscillation is little.In smelting process, in the time that a roots blower can not meet air quantity requirement, need to add again a blower fan and increase air quantity, conventionally the mode that all adopts fan parallel-connection, about the problem of roots blower different performance parallel connection, is always worthless, its main cause is that large fan delivery in parallel hinders little fan delivery, little blower fan can not normally be moved, and therefore, blower fan need to could (as shown in Figure 1) in parallel with air quantity in the situation that at same blast.China Machine Press publish " the blower fan handbook " of 1999 the 110th page Section six " series and parallel connections blower fan " in be interpreted as: blower fan often in parallel installation and operation in same system, especially all the more so while requiring Wind Volume, in the case, by long-pending the body of the each blower fan under uniform pressure (appearance) flow is added and is drawn, this just may cause air quantity too much, causes energy dissipation.If inlet conditions is restricted or flows into the air-flow of import when inhomogeneous, the overall performance of many Fans can be less than the summation of calculating in theory.Some blower fan has " just " slope on the pressure flow curve near surge pressure point left side.If select the blower fan of parallel running in this " positive " slope range, the operation of blower fan just can not be steady so, just may cause that wherein a Fans air quantity is too much, if blower fan is all independent driving, just likely make certain electromotor overload, this unbalanced stream condition can be changeable, and that causes that blower fan is interrupted has a load and non-loaded.Up to the present, can utilize the roots blower of same blast, different air quantity, different capacity to improve technology or the blank of air quantity.

Summary of the invention

The purpose of this utility model is in order to overcome above-mentioned the deficiencies in the prior art, a kind of rational in infrastructure, energy saving is provided, enhances productivity, can increase as required the energy-conservation air supply device of the roots blower of air quantity.

The utility model solves the technological scheme that its technical problem adopts:

A kind of energy-conservation air supply device of roots blower, comprise roots blower and ajutage, roots blower is connected with ajutage, it is characterized in that large ajutage and little ajutage, large ajutage sidewall is provided with interface, little ajutage interts in large ajutage through interface, the exhaust duct axis that is plugged on the little ajutage in large ajutage parallels with large ajutage axis, float airduct length is greater than 200mm, little ajutage is 65-75 ° with the angle α of large ajutage, in the time starting a Fans as required, in the pipeline of another Fans, form negative pressure, do not disturb air quantity, if while starting two Fans simultaneously, large ajutage forms jet, drive the air quantity in little supply air duct simultaneously, pull from hindering to become each other each other.

The utility model, owing to adopting said structure, has solved the defect that roots blower uniform pressure, different air quantity, different capacity hinder mutually, has rational in infrastructure, energy saving, enhances productivity, can increase as required the advantages such as air quantity.

accompanying drawing explanation

Fig. 1 is the structural representation of prior art.

Fig. 2 is structural representation of the present utility model.

Reference character: roots blower 1, supply air duct 2, large ajutage 3, interface 4, little ajutage 5, exhaust duct 6

Embodiment:

Below in conjunction with accompanying drawing, the utility model is further illustrated:

A kind of energy-conservation air supply device of roots blower, comprise roots blower 1 and supply air duct, roots blower 1 is connected with supply air duct 2, structure and the annexation of roots blower 1 are same as the prior art, this does not repeat, it is characterized in that large ajutage 3 and little ajutage 5, large ajutage 3 sidewalls are provided with interface 4, little ajutage 5 interts in large ajutage 3 through interface 4, exhaust duct 6 axis that are plugged on the little ajutage 5 in large ajutage 3 parallel with large ajutage 3 axis, float airduct 6 length are greater than 200mm, little ajutage 5 is 65-75 ° with the angle α of large ajutage 3, in the time starting a Fans as required, in the pipeline of another Fans, form negative pressure, do not disturb air quantity, if while starting two Fans simultaneously, large ajutage 3 roads form jet, drive the air quantity in little ajutage 5 roads simultaneously, pull from hindering to become each other each other.The utility model, owing to adopting said structure, has solved the defect that roots blower uniform pressure, different air quantity, different capacity hinder mutually, has rational in infrastructure, energy saving, enhances productivity, can increase as required the advantages such as air quantity.

Claims (1)

1. the energy-conservation air supply device of a roots blower, comprise roots blower and supply air duct, roots blower is connected with supply air duct, it is characterized in that being provided with large ajutage and little ajutage, large ajutage sidewall is provided with interface, little ajutage interts in large ajutage through interface, and the exhaust duct axis that is plugged on the little ajutage in large ajutage parallels with large ajutage axis, and the exhaust duct length of little ajutage is greater than 200mm.