CN2830714Y

CN2830714Y - Large Roots blower

Info

Publication number: CN2830714Y
Application number: CN 200520051431
Authority: CN
Inventors: 黄龙林; 刘孟良; 朱贵秀; 庹德荣; 陈利华; 卢哲辉
Original assignee: CHANGSHA FAN PLANT Co Ltd
Current assignee: CHANGSHA FAN PLANT Co Ltd
Priority date: 2005-07-19
Filing date: 2005-07-19
Publication date: 2006-10-25
Anticipated expiration: 2015-07-19

Abstract

The utility model discloses a Roots blower, which has high pressure and large flow-rate range. A main machine comprises a machine casing, a wall plate, an impeller shaft, impellers, an auxiliary oil box, a gear box, synchronous gears, a sealing part and a bearing, wherein the machine casing is designed with an inward flow port. Compared with the old roots blower, positioning side plates are canceled, and positioning pins are used for radial positioning; no special bearings are used for axial positioning, a front bearing is also used for axial positioning, and a special clearance is used for ensuring the blower to normally work in a small gap; the impellers are in a two-vane type and a three-vane type; the two-vane type impeller is in a cycloid vane type, and the three-vane type impeller is in an evolute and cycloid composite vane type; various shaft end seals are used. The serial blower has wide performance range, large flow quantity of 0.45 m< 3 >/min to 274 m< 3 >/ min and voltage boosting of 9.8 Kpa to 196 kpa. The accessory function of a machine set is complete, and a monitoring interface is additionally provided so as to realize automatic running protection. The serial blower has the advantages of compact structure, convenient installation, beautiful appearance, low energy consumption, high reliability and long service life.

Description

A kind of Roots blower

Technical field

The utility model relates to a kind of blower, particularly relates to a kind of Roots blower.

Background technique

Roots blower is a kind of equipment that is used for conveying gas.Its structure comprises the cylinder of being made up of casing, front and back wallboard, is located at the gear tank on the rear wall plate, and the impeller shaft of pair of parallel is housed in the casing, and impeller and the intermeshing synchromesh gear of external tooth are housed respectively on the impeller shaft, bearing, sealing etc.The blower fan of this structure is provided with special radial location side plate, special axially locating bearing, complex structure, and fan noise is big.Blower fan mostly adopts whole horizontal type structure.

The model utility content

Technical problem to be solved in the utility model provides a kind of volumetric efficiency height, the volume specific energy is low, energy consumption is low, noise is little, application is wide, simple in structure, reliable Roots blower.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is as follows: comprise the cylinder of being made up of casing, front wallboard, rear wall plate, the impeller shaft of pair of parallel is housed in the casing, impeller, fore bearing, sealed department are housed respectively on the impeller shaft, the exhaust side of described casing be provided with outlet pipe connect respectively right element volume and left element volume first in return port in the return port and second.

Roots blower radially by locating stud location, the fore bearing axially locating of holding concurrently, blower fan adopts unlike material or different sealing structure, satisfies the needs of different medium.

Adopt the Roots blower of technique scheme, owing to adopted interior return-flow structure, when air inlet finishes, the pressurized gas of exhaust side are back to element volume by interior refluxing opening, make its internal pressure reach balance with exhaust pressure in advance, flow-reversing impingement intensity when having reduced exhaust, the total noise of centrifuge level reduces.

The utility model is compared with old type Roots blower, has cancelled the location side plate, radially by locating stud location, no special axially locating bearing, and the fore bearing axially locating of holding concurrently, thereby bearing span shortens, and the bearing capacity increasing, reliability is higher.A lot of component have been reduced simultaneously, more compact structure.

The bearing of described blower fan adopts the special play group of E class precision bearing, and Impeller Machining precision height, guarantees blower fan normally operation under less gap.

Described triplicate blade impeller, triplicate blade impeller improve the pulse frequency and the intensity of air-flow, and breathing action is more become gently, good seal performance, thus the volumetric efficiency of raising blower reduces the volume specific energy, reaches purpose of energy saving.

The utility model is to satisfy the requirement that the different field different user is carried special media, adopt the multiple mode of multiple sealing, as: piston ring sealing, packing seal, fluorine rubber sealing, gas-flow closure, the sealing of unit tool, four mechanical seals etc., effectively reduction or prevention fed sheet of a media leak, guarantee not leaking of oil-containing, prevention lubricant oil of medium.

The utility model is to satisfy the requirement that the different field different user is carried special media, adopt multiple special substance and multiplex (MUX) skill, commonly used has: gray cast iron, spheroidal graphite cast iron, stainless steel, cast steel, cast copper, nickel plating, chromium plating etc. effectively solve the corrosion resistant, mill of blower fan, problem such as withstand voltage.

The utility model is established monitor-interface: the user disposes the temperature and pressure sensor as required, show fan bearing temperature, fuel tank temperature, delivery temperature, exhaust pressure, the easy-to-operat person understands the safe operation of blower fan at any time, implements blower mechanical property intellectual monitoring on the spot.

The utility model unit annex is complete, according to the configurable import and export silencing apparatus of user's needs, filter, elastomeric joint, safety valve, safety check, pressure meter etc.

The utility model performance range is wide, flow: 0.45～274m ³/ min, 9.8～196Kpa boosts.

In sum, the utility model is a kind of compact structure, simple installation, beautiful shape; Energy consumption is little; Noise is low; The Roots blower that application is wide.

Description of drawings

Fig. 1 is a Roots blower main machine structure schematic representation;

Fig. 2 is the Roots blower sealed structural representation;

Fig. 3 is a backflow operational diagram in the Roots blower;

Fig. 4 is a backflow operational diagram in the Roots blower.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in detail.

Referring to Fig. 1, Fig. 2 and 3, form cylinder by casing 1, front wallboard 8, rear wall plate 3, be located at gear-box 6, drop tank 10 on the wallboard, the impeller shaft 2 of pair of parallel is housed in the casing 1, impeller 16 and a pair of intermeshing synchromesh gear 5, fore bearing 9, rear bearing 7 are housed respectively on the impeller shaft 2, the exhaust side of described casing 1 be provided with outlet pipe 21 connect respectively right element volume 18 and left element volume 19 first in return port 20 in the return port 17 and second.Locating stud 11 location are adopted in radial location of the present utility model, have saved the side plate that conventional blower fan radial location is used, and structure is simpler.The fore bearing 7 double axially locating of doing of the present utility model have been saved the special positioning bearing of conventional blower fan, and fore bearing 7 employing E class precision and special play, and the assurance blower fan is accurately located, and makes blower fan structure simpler, moves more reliable.Casing 1 of the present utility model, front wallboard 8, rear wall plate 3, impeller 16 etc. adopt unlike material and different process means, satisfy the medium needs of different field.Sealed department 4 of the present utility model adopts multiple mode to satisfy the medium needs of different field, as Fig. 2, is the combined sealing structure of a kind of piston ring 12, rubber framework grease seal 13, O RunddichtringO 15 and oil deflector 14.The novel monitor-interface of establishing: the user disposes the temperature and pressure sensor as required, show fan bearing temperature, fuel tank temperature, delivery temperature, exhaust pressure, the easy-to-operat person understands the safe operation of blower fan at any time, implements blower mechanical property intellectual monitoring on the spot.

During work, when lobus dexter is taken turns 16 rotation diagrams, 3 positions, the breathing process of right element volume 18 finishes, return port 17 is opened in first, pressurized gas in the outlet pipe 21 of exhaust side enter right element volume 18 by return port 17 in the blower fan first, importing along with pressurized gas, right element volume 18 internal pressures reach balance with exhaust pressure in advance, simultaneously, lobus sinister wheel 22 is air-breathing with left element volume 19 beginnings that casing surrounds, when impeller rotation diagram 4 positions, the breathing process of left side element volume 19 finishes, return port 20 is opened in second, and the pressurized gas in the outlet pipe 21 of exhaust side enter left element volume 19 by return port 20 in the blower fan second, along with the importing of pressurized gas, left side element volume 19 internal pressures reach balance with exhaust pressure in advance, realized the mild exhaust of blower fan like this, the flow-reversing impingement intensity when having reduced exhaust, the total noise of centrifuge level reduces.

Claims

1, a kind of Roots blower, comprise the cylinder of forming by casing (1), front wallboard (8), rear wall plate (3), the impeller shaft (2) of pair of parallel is housed in the casing (1), impeller (16), fore bearing (9), sealed department (4) are housed respectively on the impeller shaft (2), it is characterized in that: the exhaust side of described casing (1) be provided with outlet pipe (21) connect respectively right element volume (18) and left element volume (19) first in return port (20) in the return port (17) and second.

2, a kind of Roots blower according to claim 1 is characterized in that: described casing (1) adopts the locating stud location with the radial location of described front wallboard (8), rear wall plate (3).

3, a kind of Roots blower according to claim 1 and 2 is characterized in that: described fore bearing (9) axially locating of holding concurrently.

4, a kind of Roots blower according to claim 1 and 2 is characterized in that: described impeller (16) is cycloid blade profile two leaf impellers.

5, a kind of Roots blower according to claim 3 is characterized in that: described impeller (16) is cycloid blade profile two leaf impellers.

6, a kind of Roots blower according to claim 1 and 2 is characterized in that: described impeller (16) is a triplicate blade impeller, is involute and the compound blade profile of cycloid.

7, a kind of Roots blower according to claim 3 is characterized in that: described impeller (16) is a triplicate blade impeller, is involute and the compound blade profile of cycloid.

8, a kind of Roots blower according to claim 1 and 2, it is characterized in that: the utility model is provided with monitor-interface: dispose the temperature and pressure sensor.