CN219282095U - High-temperature centrifugal fan with sealing device - Google Patents

Abstract

The utility model provides a high temperature centrifugal fan with sealing device, outer connection awl section of thick bamboo and interior heat preservation awl section of thick bamboo have been set up between spiral case and inverter motor, through welding and the bolted connection form between the big end flange of outer awl section of thick bamboo, the big end cover plate of interior awl section of thick bamboo and the motor mounting panel, constitute centrifugal fan's overall structure with each part, it has the heat preservation cotton to fill in the inner chamber of interior heat preservation awl section of thick bamboo, prevent the high temperature gas in the spiral case from leaking through triple sealing measure, graphite packing that sets up between inner heat preservation awl section of thick bamboo and the outer connection awl section of thick bamboo is first sealing, the silicone rubber sealing strip that sets up of the big end flange of outer awl section of thick bamboo, the big end cover plate of interior awl section of thick bamboo and the terminal surface of motor mounting panel is second sealing, the sealing washer that wears to establish the junction of bolt is the third sealing between the big end flange of outer awl section of thick bamboo and the motor mounting panel, change traditional movable sealing into quiet sealing form, have long service life, no stove gas leakage, the advantage of maintaining simply.

Description

High-temperature centrifugal fan with sealing device

Technical Field

The utility model relates to the field of centrifugal fans, in particular to a high-temperature centrifugal fan with a sealing device.

Background

The high-temperature centrifugal fan is widely used in places such as annealing furnaces, heating furnaces, homogenizing furnaces and aging furnaces, the inner circles of conventional fan sealing forms such as graphite packing, non-asbestos gaskets, wool felts, framework oil seals and the like are in movable sealing fit with a transmission shaft, a small amount of gas always leaks along the transmission shaft, the high-temperature centrifugal fan cannot be used in places with strict air tightness requirements, the sealing forms are easily deformed and failed due to continuous friction with the shaft under the high-temperature environment, and the leakage of high-temperature or corrosive gas in the furnace not only pollutes the surrounding environment, but also wastes a large amount of energy.

Disclosure of Invention

The utility model aims to provide a high-temperature centrifugal fan with a sealing device, which improves the sealing performance of the high-temperature centrifugal fan in a static sealing mode.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a high temperature centrifugal fan with sealing device, including inverter motor and spiral case, be connected with the transmission shaft on the inverter motor, install the impeller on the transmission shaft, the inside that the impeller is located the spiral case, the spiral case is installed along the side that keeps away from inverter motor along the axial, the air outlet has been seted up on the spiral case along radial lateral wall, the mounting hole that can supply the impeller to pass through has been seted up along the axial one side that is close to inverter motor to the spiral case, the spiral case is equipped with outer connection awl section of thick bamboo and interior heat preservation awl section of thick bamboo along one side that is close to inverter motor along the axial, the tip and the mounting hole welding of outer connection awl section of thick bamboo, the big end and the hole welding of outer connection awl section of thick bamboo, the outer conical surface of outer connection awl section of thick bamboo is close to the interior conical surface of outer connection awl section of thick bamboo, the tip and the welding of the little end of interior heat preservation awl section of thick bamboo has interior awl section of thick bamboo tip apron, interior awl section of thick bamboo tip apron is close to the mounting hole along the axial, the big end and the outer awl section of thick bamboo big end flange of thick bamboo is equipped with the motor that is close to the motor by a plurality of bolts, mounting panel and the outer flange connection through a plurality of bolts;

the inner cone large end cover plate and the inner cone small end cover plate are respectively provided with through holes for penetrating the transmission shaft, the inner heat preservation cone, the inner cone large end cover plate and the inner cone small end cover plate are matched and surrounded to form a conical cavity, heat preservation cotton is filled in the conical cavity, the transmission shaft penetrates through the heat preservation cotton, the outer cone surface of the inner heat preservation cone is provided with a plurality of cone ring grooves, graphite packing is arranged in the cone ring grooves, the outer ring surface of the graphite packing is attached to the inner cone surface of the outer connection cone, the end surface positions of the inner cone large end cover plate and the outer cone large end flange, which are attached to each other, and the end surface positions of the motor mounting plate and the inner cone large end cover plate, which are attached to each other, are respectively provided with silicon rubber sealing strips, the two side end surfaces of the inner cone large end cover plate are respectively provided with sealing gaskets, the outer cone large end flange and the motor mounting plate are respectively pressed on the sealing gaskets on the two sides of the inner cone large end cover plate, and the plurality of connecting bolts on the outer cone large end flange and the motor mounting plate respectively penetrate through the corresponding sealing gaskets.

Preferably, the side walls of the outer connecting cone and the inner heat-preserving cone and the plane where the mounting holes are located have an included angle of 95-105 degrees, and two graphite packing rods are mounted on the outer conical surface of the inner heat-preserving cone.

According to the technical scheme, the utility model has the beneficial effects that:

according to the utility model, the outer connecting cone and the inner heat-preserving cone are arranged between the spiral case and the variable frequency motor, the whole structure of the centrifugal fan is formed by welding and the bolt connection mode among the outer cone large end flange, the inner cone large end cover plate and the motor mounting plate, the whole structure of the centrifugal fan is simple and compact, the later maintenance is extremely convenient, heat-preserving cotton is filled in the inner cavity of the inner heat-preserving cone, the effect of isolating a heat source is achieved between the spiral case and the variable frequency motor, the high-temperature gas in the spiral case is prevented from leaking through triple sealing measures, the graphite packing arranged between the inner heat-preserving cone and the outer connecting cone is sealed in a first way, the silicone rubber sealing strips arranged on the end faces of the outer cone large end flange, the inner cone large end cover plate and the motor mounting plate are sealed in a second way, and the sealing gasket arranged at the connecting position of the bolt penetrating between the outer cone large end flange and the inner cone large end cover plate and the motor mounting plate is sealed in a third way.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

fig. 2 is a partial enlarged view of fig. 1.

The marks in the figure: 1. variable frequency motor, 2, the transmission shaft, 3, spiral case, 4, impeller, 5, air intake, 6, external connection awl section of thick bamboo, 7, interior heat preservation awl section of thick bamboo, 8, outer awl section of thick bamboo big end flange, 9, interior awl section of thick bamboo big end cover board, 10, motor mounting panel, 11, heat preservation cotton, 12, silicone rubber sealing strip, 13, sealing washer, 14, graphite packing.

Detailed Description

Referring to the drawings, the specific embodiments are as follows:

as shown in fig. 1, a high temperature centrifugal fan with sealing device, including inverter motor 1 and spiral case 3, be connected with transmission shaft 2 on the inverter motor 1, install impeller 4 on the transmission shaft 2, impeller 4 is located the inside of spiral case 3, and air intake 5 is installed along the axial one side of keeping away from inverter motor 1 to spiral case 3, has offered the air outlet along radial lateral wall on spiral case 3, and the mounting hole that can supply impeller 4 to pass through has been offered along one side that the axial is close to inverter motor 1 to spiral case 3.

As shown in fig. 1, an outer connecting cone 6 and an inner heat-preserving cone 7 are arranged on one side of the volute 3, which is close to the variable frequency motor 1 along the axial direction, the small end of the outer connecting cone 6 is welded with the mounting hole, the large end of the outer connecting cone 6 faces the variable frequency motor 1, the side walls of the outer connecting cone 6 and the inner heat-preserving cone 7 are all provided with an included angle of 95-105 degrees with the plane where the mounting hole is located, the large end of the outer connecting cone 6 is welded with the inner hole of the flange 8 of the large end of the outer cone, and the outer conical surface of the inner heat-preserving cone 7 is close to the inner conical surface of the outer connecting cone 6.

As shown in fig. 1, the small end of the inner heat-preserving cone 7 is welded with a small end cover plate of the inner cone, the small end cover plate of the inner cone is close to the mounting hole along the axial direction, the large end of the inner heat-preserving cone 7 is welded with a large end cover plate 9 of the inner cone, the large end cover plate 9 of the inner cone and the large end flange 8 of the outer cone are connected through a plurality of bolts, one side, close to the volute 3, of the variable frequency motor 1 is provided with a motor mounting plate 10, and the motor mounting plate 10 and the large end flange 8 of the outer cone are also connected through a plurality of bolts, so that each part forms a simple and compact integral structure of the high-temperature centrifugal fan.

As shown in fig. 1, through holes for penetrating through the transmission shaft 2 are respectively formed in the inner cone large end cover plate 9 and the inner cone small end cover plate, heat-insulating cotton 11 is filled in a conical cavity formed by matching and encircling the inner heat-insulating cone 7, the inner cone large end cover plate 9 and the inner cone small end cover plate, the transmission shaft 2 penetrates through the heat-insulating cotton 11, the heat-insulating cotton 11 plays a role in isolating a heat source between the volute 3 and the variable frequency motor 1, and high-temperature gas in the volute 3 is prevented from leaking through triple sealing measures.

As shown in fig. 2, two conical surface ring grooves are formed in the outer conical surface of the inner thermal insulation conical cylinder 7, graphite packing 14 is arranged in each conical surface ring groove, the outer annular surfaces of the two graphite packing 14 are attached to the inner conical surface of the outer connection conical cylinder 6 to serve as a first seal, and leakage of high-temperature gas from gaps between the inner thermal insulation conical cylinder 7 and the inner conical surface and the outer conical surface of the outer connection conical cylinder 6 can be prevented.

As shown in fig. 2, the end face positions of the inner cone large end cover plate 9 and the outer cone large end flange 8, and the end face positions of the motor mounting plate 10 and the inner cone large end cover plate 9, which are mutually attached, are respectively provided with end face annular grooves, and the plurality of end face annular grooves are respectively internally provided with silicone rubber sealing strips 12 as second seals, so that leakage of high-temperature gas from gaps between the inner cone large end cover plate 9 and the outer cone large end flange 8 and gaps between the motor mounting plate 10 and the inner cone large end cover plate 9 is prevented.

As shown in fig. 2, sealing washers 13 are respectively arranged on two side end faces of the inner cone large end cover plate 9, the outer cone large end flange 8 and the motor mounting plate 10 are respectively pressed on the sealing washers 13 on two sides of the inner cone large end cover plate 9, and a plurality of connecting bolts on the outer cone large end flange 8 and the motor mounting plate 10 respectively penetrate through the corresponding sealing washers 13 to be used as third sealing, so that high-temperature gas can be prevented from leaking from gaps among the outer cone large end flange 8, the inner cone large end cover plate 9 and the motor mounting plate 10, and extra sealing can be carried out on the inter-plate connecting parts with gaps generated due to screwing of the bolts, and the high-temperature gas is further prevented from leaking.

Claims (2)

1. The utility model provides a high temperature centrifugal fan with sealing device, including inverter motor (1) and spiral case (3), be connected with transmission shaft (2) on inverter motor (1), install impeller (4) on transmission shaft (2), impeller (4) are located the inside of spiral case (3), air intake (5) are installed along one side that inverter motor (1) was kept away from to axial to spiral case (3), the air outlet has been seted up on spiral case (3) along radial lateral wall, spiral case (3) are offered along one side that is close to inverter motor (1) along the axial and can be supplied mounting hole that impeller (4) passed through, its characterized in that: an outer connecting cone (6) and an inner heat-preserving cone (7) are arranged on one side of the volute (3) which is axially close to the variable frequency motor (1), the small end of the outer connecting cone (6) is welded with a mounting hole, the large end of the outer connecting cone (6) faces the variable frequency motor (1), the large end of the outer connecting cone (6) is welded with the inner hole of an outer cone large end flange (8), the outer conical surface of the inner heat-preserving cone (7) is close to the inner conical surface of the outer connecting cone (6), the small end of the inner heat-preserving cone (7) is welded with an inner cone small end cover plate, the inner cone large end cover plate (9) is welded on the large end of the inner heat-preserving cone (7), the inner cone large end cover plate (9) is connected with the outer cone large end flange (8) through a plurality of bolts, and one side of the variable frequency motor (1) which is close to the volute (3) is provided with a motor mounting plate (10), and the motor mounting plate (10) is also connected with the outer cone large end flange (8) through a plurality of bolts;

the large end cover plate (9) of the inner cone and the small end cover plate of the inner cone are respectively provided with through holes for penetrating the transmission shaft (2), the conical cavity formed by the inner heat preservation cone (7), the large end cover plate (9) of the inner cone and the small end cover plate of the inner cone in a matched mode is internally filled with heat preservation cotton (11), the transmission shaft (2) is penetrated into the heat preservation cotton (11), the outer conical surface of the inner heat preservation cone (7) is provided with a plurality of conical surface ring grooves, graphite packing (14) are arranged in the conical surface ring grooves, the outer annular surface of the graphite packing (14) is attached to the inner conical surface of the outer connecting cone (6), the end surface positions of the large end cover plate (9) of the inner cone and the large end flange (8) of the outer cone are attached to each other, the end positions of the end surfaces of the motor mounting plate (10) and the large end cover plate (9) of the inner cone are respectively provided with end surface ring grooves, the inner cone large end cover plates (9) are respectively provided with silicon rubber sealing strips (12), the two side end surfaces of the large end cover plates (9) of the inner cone are respectively provided with sealing gaskets (13), and the large end flanges (8) of the motor and the large end covers (10) of the inner cone are respectively arranged on the large end covers (8) of the large end covers of the motor and the large end covers (13).

2. A high temperature centrifugal fan with sealing device according to claim 1, wherein: the side walls of the outer connecting cone (6) and the inner heat-preserving cone (7) have an included angle of 95-105 degrees with the plane where the mounting hole is located, and two graphite packing (14) are arranged on the outer conical surface of the inner heat-preserving cone (7).

Images