CN205876762U - Overload protection centrifugal fan - Google Patents

Abstract

The utility model discloses an overload protection centrifugal fan, including casing and impeller assembly, the impeller assembly includes the main blade wheel, the main blade wheel is including the impeller hub disk, form arch to extending in the impeller on the impeller hub disk, it is protruding for middle that link up and coaxial with the impeller hub disk, be equipped with the overflow valve in the arch, the casing is equipped with main air outlet in corresponding main blade wheel department, the utility model discloses utilize the overflow valve to realize the overload protection function.

Description

Overload protection centrifugal blower

Technical field

This utility model relates to a kind of industrial blower fan, particularly to a kind of overload protection centrifugal blower.

Background technology

Along with the propelling of China's process of industrialization, centrifugal blower is increasingly becoming the important corollary equipment of industry, centrifugal blower Being dependent on the mechanical energy of input, improve gas pressure and supply gas side by side the machinery of body, it is widely used in factory, mine, tunnel, cold But the ventilation of tower, vehicle, boats and ships and building, dust discharge and cooling；Boiler and the ventilation of industrial furnace and air inducing；Air regulation sets Cooling in standby and domestic electric appliance and ventilation；The drying of corn and selecting and recommending；Wind-tunnel wind regime and the inflation of aircushion vehicle and propelling Deng.

The power consumption of centrifugal blower is directly by air quantity influenced by wind pressure, centrifugal blower in use for some time, pipeline meeting Accumulation foreign material, after safeguarding cleaning pipeline, the static pressure of centrifugal blower can diminish, and dynamic pressure becomes big, and air quantity will become greatly with square number, but It is that efficiency is basically unchanged, real consumption excursion, motor will be burnt out when increasing to motor rated power.

Utility model content

For the deficiencies in the prior art, this utility model provides a kind of mistake utilizing overflow valve to realize overload protection function Carry protection centrifugal blower.

For achieving the above object, this utility model provides following technical scheme: a kind of overload protection centrifugal blower, including Casing and impeller assembly, described impeller assembly includes that main impeller, described main impeller include impeller hub disk, on described impeller hub disk to Extending in impeller and form projection, described projection is middle through and coaxial with impeller hub disk, is provided with overflow valve in described projection, Described casing is provided with main air outlet at corresponding main impeller.

Further, described excessive wind outlet connection has the first diffuser.

Further, described first diffuser is the first vaneless diffuser, and its wall is horn-like.

Further, described first diffuser is the first vaned diffuser.

Further, being provided with accessory impeller after described first diffuser, described accessory impeller connects auxiliary-motor.

Further, described casing is provided with secondary air outlet at corresponding accessory impeller, and described secondary air outlet leads to main air outlet, Described secondary air outlet is provided with valve.

Further, rotating shaft that described main impeller is logical in also including and impeller front disc, described rotating shaft is fixed with impeller front disc Connecting, described rotating shaft is provided with driven gear ring, is provided with driving gear engagingly with described driven gear ring, and described driving gear connects There is mair motor.

Further, described impeller front disc and impeller hub disk are provided with the second diffuser.

Further, described second diffuser is the second vaneless diffuser, and its wall is horn-like.

Further, described second diffuser is the second vaned diffuser.

In sum, when the blast of the air inlet of centrifugal blower is normal, overflow valve cuts out, and impeller hub disk is closed, wind Discharging through main impeller, accessory impeller does not works；When the blast of the air inlet of centrifugal blower is excessive, overflow valve is opened, one Divide wind to enter projection, derive from impeller hub disk, so can protect mair motor when blast is excessive, it is to avoid mair motor transships and burns Bad.

Accompanying drawing explanation

Fig. 1 is the side view of this utility model overload protection centrifugal blower；

Fig. 2 is the front view of this utility model overload protection centrifugal blower；

Fig. 3 is the three dimensional structure schematic diagram of this utility model overload protection centrifugal blower.

Accompanying drawing illustrates: 1, casing；2, main impeller；3, impeller hub disk；4, protruding；5, overflow valve；6, main air outlet；7, first Diffuser；8, accessory impeller；9, auxiliary-motor；10, secondary air outlet；11, valve；12, rotating shaft；13, impeller front disc；14, driven gear ring； 15, driving gear；16, mair motor；17, the second diffuser.

Detailed description of the invention

Referring to figs. 1 through Fig. 3, the embodiment of this utility model overload protection centrifugal blower is described further.

A kind of overload protection centrifugal blower, including casing 1 and impeller assembly, described impeller assembly includes main impeller 2, described Main impeller 2 includes impeller hub disk 3, described impeller hub disk 3 extends in impeller and forms protruding 4, and the present embodiment is preferred, described The wall of protruding 4 is | (1 x) | function shape, described protruding 4 be centre through and coaxial with impeller hub disk 3, described projection Being provided with overflow valve 5 in 4, described casing 1 is provided with main air outlet 6 at corresponding main impeller 2.

The present embodiment is preferred, is provided with accessory impeller 8 after described first diffuser 7, and the present embodiment is preferred, described accessory impeller 8 is separately positioned with the first diffuser 7, and described accessory impeller 8 connects auxiliary-motor 9.

By using technique scheme, when the blast of the air inlet of centrifugal blower is normal, overflow valve 5 cuts out, convex Playing 4 to be closed, wind is discharged through main impeller 2, and accessory impeller 8 does not works；When the blast of the air inlet of centrifugal blower is excessive, overflow Stream valve 5 is opened, and a part of wind enters protruding 4, derives from impeller hub disk 3, so can protect mair motor when blast is excessive 16, it is to avoid mair motor 16 overload burns out；The wall of protruding 4 is | (1 x) | function shape, so can reduce air drag, carry The efficiency of high centrifugal blower.

Accessory impeller 8 can be centrifuged further with the wind overflowed from impeller hub disk 3, improves gas pressure dispatch Gas；Accessory impeller 8 is driven by auxiliary-motor 9；Accessory impeller 8 is separately positioned with the first diffuser 7, only for accessory impeller 8 and main impeller 2 Vertical rotation provides possible, is started without accessory impeller 8, energy-conserving and environment-protective when blast is normal.

The present embodiment is preferred, and the outlet connection of described excessive wind has the first diffuser 7.

By use technique scheme, the first diffuser 7 can by the wind rectification overflowed from impeller hub disk 3, deceleration and Supercharging, thus reduce the load of accessory impeller 8, reduce the dimensions of accessory impeller 8, energy-conserving and environment-protective.

The present embodiment is preferred, and described first diffuser 7 is the first vaneless diffuser, and its wall is horn-like.

By using technique scheme, the first vaneless diffuser simple in construction, wind is slowed down supercharging by trumpet-shaped wall, Cost is relatively low.

The present embodiment is preferred, and described first diffuser 7 is the first vaned diffuser.

By using technique scheme, the first vaned diffuser takes up room less, and diffusion effect is preferable, beneficially cloth Put.

The present embodiment is preferred, and described casing 1 is provided with secondary air outlet 10, described secondary air outlet 10 at corresponding accessory impeller 8 Leading to main air outlet 6, described secondary air outlet 10 is provided with valve 11.

Valve by using technique scheme, when the blast of main impeller 2 air inlet is normal, on secondary air outlet 10 11 close, and wind is discharged by main air outlet 6 after main impeller 2 is centrifugal；When the blast of main impeller 2 air inlet is excessive, auxiliary-motor 9 Starting, accessory impeller 8 rotates, and valve 11 is opened, and the wind being centrifuged out through accessory impeller 8 leads to main air outlet 6, through main impeller 2 and accessory lobes The centrifugal wind of wheel 8 is integrated, and discharges together, improves efficiency.

The present embodiment is preferred, described main impeller 2 also include in logical rotating shaft 12 and impeller front disc 13, described rotating shaft 12 with Impeller front disc 13 is fixing to be connected, and described rotating shaft 12 is provided with driven gear ring 14, is provided with engagingly actively with described driven gear ring 14 Gear 15, described driving gear 15 connects mair motor 16.

By using technique scheme, using the rotating shaft 12 of hollow, wind is by the internal main impeller 2 that enters of rotating shaft 12, so Can ensure that incoming air area, and reduce air drag；Mair motor 16 drives driving gear 15 to rotate, and then nibbles with driving gear 15 The driven gear ring 14 closed rotates, thus drives rotating shaft 12 to rotate, and final drive main impeller 2 rotates.

The present embodiment is preferred, and described impeller front disc 13 is provided with the second diffuser 17 with impeller hub disk 3.

By using technique scheme, the wind deceleration supercharging that the second diffuser 17 can will be centrifuged out from main impeller 2, Reach the standard of blast at air outlet.

The present embodiment is preferred, and described second diffuser 17 is the second vaneless diffuser, and its wall is horn-like.

By using technique scheme, the second vaneless diffuser simple in construction, wind is slowed down supercharging by trumpet-shaped wall, Cost is relatively low.

The present embodiment is preferred, and described second diffuser 17 is the second vaned diffuser.

By using technique scheme, the second vaned diffuser takes up room less, and diffusion effect is preferable, beneficially cloth Put.

When the blast of main impeller 2 air inlet is normal, the valve 11 on secondary air outlet 10 is closed, and overflow valve 5 cuts out, convex Playing 4 to be closed, mair motor 16 drives driving gear 15 to rotate, and the driven gear ring 14 then engaged with driving gear 15 rotates, from And driving rotating shaft 12 to rotate, final drive main impeller 2 rotates；Wind is centrifuged through main impeller 2 and is discharged by main air outlet 6, accessory impeller 8 Do not work.

When the blast of main impeller 2 air inlet is excessive, overflow valve 5 is opened, and a part of wind enters protruding 4, after impeller Dish 3 is derived, through the first diffuser 7, and wind rectification, deceleration and the supercharging that the first diffuser 7 can will overflow from impeller hub disk 3, Thus reduce the load of accessory impeller 8, reduce the dimensions of accessory impeller 8, energy-conserving and environment-protective；Then auxiliary-motor 9 starts, accessory impeller 8 Rotating, valve 11 is opened, and wind is entered accessory impeller 8 by the first diffuser 7, and the wind being centrifuged out through accessory impeller 8 leads to main air outlet 6, Integrated through main impeller 2 and the centrifugal wind of accessory impeller 8, discharge together, improve efficiency；Accessory impeller 8 is driven by auxiliary-motor 9；This Sample can protect mair motor 16 when blast is excessive, it is to avoid mair motor 16 overload burns out.

The above is only preferred implementation of the present utility model, and protection domain of the present utility model is not limited merely to Above-described embodiment, all technical schemes belonged under this utility model thinking belong to protection domain of the present utility model.Should refer to Go out, for those skilled in the art, without departing from the some improvement under this utility model principle premise and Retouching, these improvements and modifications also should be regarded as protection domain of the present utility model.

Claims (10)

1. an overload protection centrifugal blower, including casing and impeller assembly, it is characterised in that described impeller assembly includes main lobe Wheel, described main impeller includes impeller hub disk, described impeller hub disk extends in impeller and forms projection, and described projection is that centre is passed through Logical and coaxial with impeller hub disk, it is provided with overflow valve in described projection, described casing is provided with main air outlet at corresponding main impeller.

Overload protection centrifugal blower the most according to claim 1, it is characterised in that described impeller hub disk is at corresponding overflow valve Place is provided with the outlet of excessive wind, and the outlet connection of described excessive wind has the first diffuser.

Overload protection centrifugal blower the most according to claim 2, it is characterised in that described first diffuser is first without leaf Diffuser, its wall is horn-like.

Overload protection centrifugal blower the most according to claim 2, it is characterised in that described first diffuser is first to have leaf Diffuser.

5. according to the overload protection centrifugal blower described in claim 3 or 4, it is characterised in that be provided with after described first diffuser Accessory impeller, described accessory impeller connects auxiliary-motor.

Overload protection centrifugal blower the most according to claim 5, it is characterised in that described casing sets at corresponding accessory impeller Having secondary air outlet, described secondary air outlet to lead to main air outlet, described secondary air outlet is provided with valve.

Overload protection centrifugal blower the most according to claim 6, it is characterised in that described main impeller is logical turning in also including Axle and impeller front disc, described rotating shaft is fixing with impeller front disc to be connected, and described rotating shaft is provided with driven gear ring, with described driven gear ring Being provided with driving gear engagingly, described driving gear connects mair motor.

Overload protection centrifugal blower the most according to claim 7, it is characterised in that in described impeller front disc and impeller hub disk It is provided with the second diffuser.

Overload protection centrifugal blower the most according to claim 8, it is characterised in that described second diffuser is second without leaf Diffuser, its wall is horn-like.

Overload protection centrifugal blower the most according to claim 8, it is characterised in that described second diffuser is second to have Leaf diffuser.