CN218563931U

CN218563931U - Centrifugal explosion-proof fan

Info

Publication number: CN218563931U
Application number: CN202223261449.2U
Authority: CN
Inventors: 胡妲; 李艳; 周保中
Original assignee: Huadian Electric Power Research Institute Co Ltd
Current assignee: Huadian Electric Power Research Institute Co Ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-03-03
Anticipated expiration: 2032-12-06

Abstract

The application discloses explosion-proof fan of centrifugal includes: the centrifugal fan comprises a case, a motor, a centrifugal impeller, an exhaust volute, an oil inlet pipe and an oil outlet pipe, wherein the side wall of the case is provided with an air inlet and an air outlet, and a support is arranged inside the case; the motor is arranged on a bracket in the case; the centrifugal impeller is connected to an output main shaft of the motor and corresponds to the air inlet, and the output main shaft is connected to the support through a first bearing; the exhaust volute is arranged on the periphery of the centrifugal impeller, and an outlet of the exhaust volute corresponds to the air outlet; the support is provided with an oil delivery channel communicated with the oil inlet pipe and the oil outlet pipe, and the oil inlet pipe and the oil outlet pipe are used for delivering lubricating oil for lubricating the first bearing. Through adopting centrifugal impeller compressed gas, can obtain higher pressure ratio, centrifugal impeller's blade is higher than axial flow impeller's blade rigidity coefficient, and especially when carrying inflammable, explosive gas, the blade is difficult because of solid particle collision damages, has better security and longer life.

Description

Centrifugal explosion-proof fan

Technical Field

The application relates to the technical field of fans, in particular to a centrifugal explosion-proof fan.

Background

The fan is a machine for converting input mechanical energy and electric energy into fluid kinetic energy, and is widely applied in various fields.

At present, the common fan for conveying inflammable and explosive gases is an axial flow fan, but the outlet flow rate of the axial flow fan is lower, impurities carried in air flow strike the inside of the fan, the blade is easy to damage, and the risk of explosion is caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides an aim at provides a centrifugal explosion-proof fan can improve its operating stability.

In order to achieve the above purpose, the present application provides the following technical solutions:

a centrifugal explosion-proof fan comprising:

the side wall of the case is provided with an air inlet and an air outlet, and a bracket is arranged in the case;

the motor is arranged on the bracket in the case;

the centrifugal impeller is connected to an output main shaft of the motor and corresponds to the air inlet, and the output main shaft is connected to the support through a first bearing;

the support is provided with an oil conveying channel communicated with the oil inlet pipe and the oil outlet pipe, and the oil inlet pipe and the oil outlet pipe are used for conveying lubricating oil for lubricating the first bearing;

and the exhaust volute is arranged on the periphery of the centrifugal impeller, and an outlet of the exhaust volute corresponds to the air outlet.

Preferably, an air inlet pipe extending inwards is arranged at the air inlet of the case.

Preferably, the bracket comprises a base frame and an intermediate casing, the motor and the intermediate casing are fixed on the base frame, the first bearing is arranged in the intermediate casing, and the oil delivery channel is arranged on the side wall of the intermediate casing.

Preferably, two ends of the intermediate casing are provided with sealing covers, and a dynamic seal is arranged between each sealing cover and the output main shaft.

Preferably, the front end of the output main shaft is provided with a front locking nut, and the front locking nut is used for pressing the centrifugal impeller on the output main shaft.

Preferably, the exhaust volute is fixed to one end of the intermediate casing.

Preferably, the top of the case is provided with an upper interface for fixing the inlet of the oil inlet pipe, and the bottom of the case is provided with a lower interface for fixing the outlet of the oil outlet pipe.

Compared with the prior art, the technical scheme has the following advantages:

the application provides a centrifugal explosion-proof fan, at the during operation, motor drive centrifugal impeller rotates, and the air current gets into from the air inlet of quick-witted case, through centrifugal impeller doing work, and gas is compressed the back, gets into the exhaust spiral case, discharges at a high speed from the gas outlet, can be used to remove dust, carry inflammable, explosive gas etc.. Through adopting centrifugal impeller compressed gas, can obtain higher pressure ratio, centrifugal impeller's blade is more stout than axial compressor impeller's is shorter, and the blade rigidity coefficient that corresponds is higher, especially when carrying easily fire, explosive gas, and the blade is difficult for damaging because of the solid particle collision, has better security and the life of a longer time. In addition, the first bearing is lubricated and cooled through the oil inlet pipe and the oil outlet pipe, so that the service life of the first bearing can be prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a cross-sectional view of a centrifugal explosion-proof fan according to an embodiment of the present application;

FIG. 2 is a side view of a centrifugal explosion-proof fan according to one embodiment of the present application;

fig. 3 is a schematic structural diagram of a centrifugal explosion-proof fan according to an embodiment of the present disclosure after a chassis is removed;

FIG. 4 is a front view of FIG. 3;

fig. 5 is an external structural schematic diagram of a centrifugal explosion-proof fan according to an embodiment of the present application.

The reference numbers are as follows:

the structure comprises an oil outlet pipe 1, a case 2, a first bearing 3, a first dynamic seal 4, an air inlet 5, a front lock nut 6, a centrifugal impeller 7, an exhaust volute 8, an oil inlet pipe 9, an intermediate casing 10, a stator casing 11, a stator winding and an iron core 12, an output spindle 13, a rotor magnetic pole and a rotor coil 14, a second bearing 15, a rear lock nut 16, a motor end cover 17, a second dynamic seal 18, a support 19, an air outlet 20 and an air inlet pipe 21.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

Please refer to fig. 1 to 5.

The embodiment of the application provides a centrifugal explosion-proof fan includes: the device comprises a case 2, a motor, a centrifugal impeller 7, an exhaust volute 8, an oil inlet pipe 9 and an oil outlet pipe 1, wherein the side wall of the case 2 is provided with an air inlet 5 and an air outlet 20, and a support 19 is arranged inside the case; the motor is arranged on a bracket 19 in the case 2, the motor is preferably an alternating current motor, and the vibration of the fan during working can be reduced through the bracket 19; the centrifugal impeller 7 is connected to an output main shaft 13 of the motor and corresponds to the air inlet 5, the output main shaft 13 is connected to the support 19 through the first bearing 3, the first bearing 3 is preferably a three-point contact ball bearing, that is, the centrifugal impeller 7 and the motor share one main shaft, the output main shaft used by the existing fan usually needs a coupling to connect with a rotating shaft, the impeller is installed on the rotating shaft, that is, the impeller is a two-section structure, in this embodiment, a shaft is adopted without a coupling, so that the structural stability can be improved, and the axial length of the fan can be reduced; the exhaust volute 8 is arranged on the periphery of the centrifugal impeller 7, and an outlet of the exhaust volute 8 corresponds to the air outlet 20; the support 19 is provided with an oil transportation channel communicated with the oil inlet pipe 9 and the oil outlet pipe 1, the oil inlet pipe 9 and the oil outlet pipe 1 are used for conveying lubricating oil for lubricating the first bearing 3, so that the lubricating effect can be achieved, the working temperature of the first bearing 3 can be reduced, and the service life is prolonged. When the fan works, the motor drives the centrifugal impeller 7 to rotate, airflow enters from the air inlet 5 of the case 2, works through the centrifugal impeller 7, is compressed, enters the exhaust volute 8, is discharged from the air outlet 20 at a high speed, and can be used for removing dust, conveying inflammable and explosive gases and the like. Through adopting centrifugal impeller 7 compressed gas, can obtain higher pressure ratio, energy conversion efficiency is higher, and centrifugal impeller 7's blade is more sturdy than axial compressor impeller's is shorter, and the blade rigidity coefficient that corresponds is higher, and especially when carrying inflammable, explosive gas, the blade is difficult for damaging because of the solid particle collision, has better security and longer life.

In some embodiments of the present application, an inwardly extending air inlet duct 21 is provided at the air inlet 5 of the housing 2, wherein the air inlet duct 21 can function to guide the air flow into the centrifugal impeller 7, and the air inlet duct 21 is preferably integrally formed with the housing 2 and can be connected to the housing 2 by fasteners such as screws.

In some embodiments of the present application, the support 19 includes a bottom frame and an intermediary casing 10, the motor and the intermediary casing 10 are fixed on the bottom frame, the structure of the bottom frame is preferably a vertically arranged support plate, the motor is fixed on one of the support plates, the intermediary casing 10 is fixed on the other support plate, in addition, a shock absorption pad can be further arranged on the bottom frame to prevent the vibration of the motor during operation from being transmitted to the case 2, so as to improve the stability of the fan operation, the first bearing 3 is arranged in the intermediary casing 10, and the oil transmission channel is arranged on the side wall of the intermediary casing 10. Wherein support the motor through the chassis, can improve the installation stability of motor. The motor specifically comprises a stator casing 11, a stator winding and an iron core 12, a rotor magnetic pole and a coil 14, wherein the stator casing 11 is fixed on a chassis, one end of the stator casing 11 is connected with one end of an intermediate casing 10, one end, far away from the intermediate casing 10, of the stator casing 11 is provided with a motor end cover 17, the stator winding and the iron core 12 are fixed in the stator casing 11, the rotor magnetic pole and the coil 14 are fixedly sleeved on an output spindle 13, one end, far away from a first bearing 3, of the output spindle 13 is provided with a second bearing 15, the second bearing 15 can be a rolling rod bearing, the second bearing 15 is limited on the output spindle 13 through a rear locking nut 16, the front end of the output spindle 13 is provided with a front locking nut 6, the front locking nut 6 is used for pressing a centrifugal impeller 7 on the output spindle 13, the rotor magnetic pole, the coil 14 and the spindle can be connected through a plurality of pins distributed along the circumferential direction, and the centrifugal impeller 7 can be connected with the output spindle 13 through a spline.

Wherein, the two ends of the intermediary casing 10 are provided with sealing covers, and a dynamic seal is arranged between the sealing covers and the output main shaft 13, as shown in fig. 1, the two dynamic seals are respectively marked as a first dynamic seal 4 and a second dynamic seal 18 along the front and back direction of the output main shaft 13. The exhaust volute 8 is fixed at one end of an intermediate casing 10, the exhaust volute 8 and the intermediate casing 10 can be connected through screws, the other end of the intermediate casing 10 is connected with one end of a stator casing 11, and the joint of the intermediate casing 10 and the stator casing 11 shares a sealing cover.

In some embodiments of this application, the top of machine case 2 is equipped with the last interface that is used for the fixed import that advances oil pipe 9, and the bottom of machine case 2 is equipped with the lower interface that is used for the fixed export that goes out oil pipe 1, arranges from top to bottom through advancing oil pipe 9 and going out oil pipe 1, can improve the smoothness nature of lubricating oil, is favorable to improving the radiating effect.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The above has described a centrifugal explosion-proof fan that this application provided in detail. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, without departing from the principle of the present application, the present application can also make several improvements and modifications, and those improvements and modifications also fall into the protection scope of the claims of the present application.

Claims

1. A centrifugal explosion-proof fan, characterized by comprising:

the motor is arranged on the bracket in the case;

2. The explosion-proof fan of claim 1 wherein an inwardly extending air inlet duct is provided at the air inlet of the housing.

3. The explosion-proof centrifugal fan of claim 1 wherein said frame includes a base frame and an intermediate casing, said motor and said intermediate casing being secured to said base frame, said first bearing being disposed in said intermediate casing, said oil delivery passage being disposed in a side wall of said intermediate casing.

4. The explosion-proof fan of claim 3 wherein said intermediate casing has sealing covers at both ends, and a dynamic seal is provided between said sealing covers and the output shaft.

5. The explosion-proof centrifugal fan of claim 1 wherein the front end of the output spindle is provided with a front lock nut for pressing the centrifugal impeller against the output spindle.

6. A centrifugal type explosion-proof fan as recited in claim 3, wherein the exhaust volute is fixed to one end of the intermediate casing.

7. The explosion-proof fan of claim 1, wherein the top of the housing is provided with an upper port for fixing the inlet of the oil inlet pipe, and the bottom of the housing is provided with a lower port for fixing the outlet of the oil outlet pipe.