CN219412906U

CN219412906U - Fan with corrosion-resistant function

Info

Publication number: CN219412906U
Application number: CN202320892483.5U
Authority: CN
Inventors: 莫清龙; 薛江涛
Original assignee: CHANGSHA BLOWER CO LTD
Current assignee: CHANGSHA BLOWER CO LTD
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-07-25
Anticipated expiration: 2033-04-20

Abstract

The utility model provides a fan with corrosion resistance, comprising: the shell is provided with an air inlet runner and an air outlet runner; the wall plates are arranged at two ends of the shell, the rotor comprises a rotating shaft and an impeller, the impeller is arranged on the rotating shaft, bearings are arranged at two ends of the rotating shaft, and the rotating shaft is fixed on the wall plates through the bearings and enables the rotor to rotate in the shell; the inner wall of casing, air intake runner, air outlet runner, wallboard and the surface of rotor are provided with first protective coating respectively, be provided with the second protective coating on the first protective coating, first protective coating is corrosion-resistant coating or wear-resisting corrosion-resistant coating, the second protective coating is closed pore coating, and first protective coating has corrosion-resistant effect at least, makes the fan when carrying corrosive medium, and corrosion resistance improves, and life has obtained improving, simultaneously for the fan of current stainless steel material, the cost greatly reduced.

Description

Fan with corrosion-resistant function

Technical Field

The utility model relates to the field of fans, in particular to a fan with a corrosion resistance function.

Background

The fan is a machine for increasing the pressure of gas and discharging the gas by means of input mechanical energy, wherein the fan can be divided into: positive displacement fans are typically represented by Roots fans, which are two broad categories, positive displacement and centrifugal.

The existing Roots blower comprises five parts, namely a casing (1), a wallboard, an impeller (also called a rotor (2)), an oil tank and a muffler, wherein the casing (1) mainly plays roles of supporting and fixing the wallboard, the impeller and the muffler; the wallboard is used for connecting the shell (1) and the impeller and supporting the rotation of the impeller, and has the effect of end face sealing; the impeller is a power part and is generally divided into two blades and three blades; the oil tank is used for storing lubricating oil for lubricating the gears and the bearings, and the muffler is used for reducing noise generated when the Roots blower enters and exits. The casing (1) and the wallboard form a cavity, an air inlet flow channel (3) and an air outlet flow channel (3) are arranged on the casing (1), and the impeller is arranged in the cavity and pressurizes the gas in the cavity.

Traditional Roots blower is cast by cast iron material, has poor corrosion resistance, and when the conveyed medium is corrosive gas, the medium can corrode the surface contacted with the medium, so that the service life of the Roots blower is shortened or scrapped. In order to realize the transportation of corrosive media, the components contacted with the media are changed into stainless steel materials by the Roots blower, and the stainless steel materials have higher price and are difficult to process, so that the production cost of enterprises is increased.

Disclosure of Invention

The utility model provides a fan with a corrosion resistance function, and aims to solve the problems that a corrosive medium is easy to corrode the inner wall of the fan during conveying and the service life of the fan is shortened.

In order to achieve the above object, an embodiment of the present utility model provides a fan having a corrosion resistance function, comprising:

the shell is provided with an air inlet runner and an air outlet runner;

wall plates arranged at two ends of the casing,

the rotor comprises a rotating shaft and an impeller, wherein the impeller is arranged on the rotating shaft, bearings are arranged at two ends of the rotating shaft, and the rotating shaft is fixed on a wallboard through the bearings and enables the rotor to rotate in the shell;

the inner wall of the shell, the air inlet flow channel, the air outlet flow channel, the inner wall of the wallboard and the outer surface of the rotor are respectively provided with a first protective coating, the first protective coating is provided with a second protective coating, the first protective coating is a corrosion-resistant coating or a wear-resistant corrosion-resistant coating, and the second protective coating is a closed pore coating.

Preferably, the thickness of the first protective coating is 20-50 μm and the thickness of the second protective coating is 5-10 μm.

Preferably, the first protective coating is formed via thermal spraying.

Preferably, the corrosion-resistant coating is a nickel-based corrosion-resistant alloy.

Preferably, the wear-resistant and corrosion-resistant coating is a tungsten carbide-cobalt-chromium alloy.

Preferably, the closed pore coating is a ceramifiable precursor polymer.

The scheme of the utility model has the following beneficial effects:

the inner surface of the fan is coated with the first protective coating and the second protective coating, and the first protective coating has at least a corrosion-resistant effect, so that when the fan is used for conveying corrosive media, the corrosion resistance is improved, the service life is prolonged, and meanwhile, compared with the existing stainless steel fan, the cost is greatly reduced.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

FIG. 1 is a longitudinal cross-sectional view of the present application;

fig. 2 is an enlarged view of a portion a in fig. 1.

[ reference numerals description ]

1-casing, 2-rotor, 3-air outlet runner, 4-first protective coating, 5-second protective coating.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and 2, an embodiment of the present utility model provides a fan with corrosion resistance, which comprises a casing 1, a wallboard, and a rotor 2, wherein the casing 1 is arranged on an air inlet runner and an air outlet runner 3; the wallboard sets up the front and back end at casing 1 and is used for sealing casing 1, rotor 2 includes pivot and impeller, the impeller sets up in the pivot, the both ends of pivot are provided with the bearing respectively, rotor 2 passes through the bearing and installs respectively on the wallboard, rotor 2 is when rotating, medium to the fan inside is pressurized, be provided with first protective coating 4 and second protective coating 5 at the surface that the fan is inside and medium contact, namely be provided with first protective coating 4 respectively at the inner wall of casing 1, the inner wall of air intake runner, the inner wall of air outlet runner 3, the inner wall of wallboard and the surface of rotor 2, be provided with second protective coating 5 on first protective coating 4. Wherein the first protective coating 4 is a corrosion-resistant coating or a wear-resistant corrosion-resistant coating and the second protective coating 5 is a closed pore coating.

In this application, through coating first protective coating 4 and second protective coating 5, can effectually avoid the corruption of corrosive medium to the fan, help improving the life of fan, reduce the cost of fan simultaneously.

It should be noted that the fans indicated in this application are not limited to Roots fans, and that other types of fans may employ the present structure to promote corrosion resistance to the media.

Further, the first protective coating 4 is formed by thermal spraying, and the surface of the fan in contact with the medium is required to be pretreated before thermal spraying, wherein the pretreatment comprises adjustment, grinding and control, cleaning after dynamic balance verification, removing greasy dirt and scrap iron on the component, and performing sand blasting on the surface in contact with the medium after cleaning. And spraying the first protective coating 4 in a thermal spraying mode in the region after sand blasting, checking the thickness of the first protective coating 4 after the first protective coating 4 is cooled, requiring the thickness of the first protective coating 4 to be 30-50 mu m, and brushing a second protective coating 5 of 5-10 mu m on the first protective coating 4 after the first protective coating 4 is qualified. The second protective coating 5 is used for closing the pores of the first protective coating 4, and further reducing the damage of corrosive media to the fan.

Preferably, the corrosion resistant coating is a nickel-based corrosion resistant alloy, such as Ha-alloy C276 powder from Tianjin cast gold technology development Co., ltd.

Preferably, the wear-resistant and corrosion-resistant coating is a tungsten carbide-cobalt-chromium alloy manufactured by Tianjin cast gold technology development Co.Ltd, with a specification of Co-10Cr-4WC.

Preferably, the closed pore coating is a ceramifiable precursor polymer, such as a material having a specification of YRS BF-300 in the product of the company amberlite materials technology, inc.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.

Claims

1. A blower having corrosion resistance, comprising:

the device comprises a shell (1), wherein an air inlet runner and an air outlet runner (3) are arranged on the shell (1);

wallboards arranged at two ends of the shell (1),

the rotor (2) comprises a rotating shaft and an impeller, the impeller is arranged on the rotating shaft, bearings are arranged at two ends of the rotating shaft, and the rotating shaft is fixed on a wallboard through the bearings and enables the rotor (2) to rotate in the casing (1);

the method is characterized in that: the novel air conditioner is characterized in that a first protective coating (4) is arranged on the inner wall of the casing (1), the air inlet flow channel, the air outlet flow channel (3), the inner wall of the wallboard and the outer surface of the rotor (2) respectively, a second protective coating (5) is arranged on the first protective coating (4), the first protective coating (4) is a corrosion-resistant coating or a wear-resistant corrosion-resistant coating, and the second protective coating (5) is a closed pore coating.

2. The blower with corrosion resistance according to claim 1, wherein: the thickness of the first protective coating (4) is 20-50 mu m, and the thickness of the second protective coating (5) is 5-10 mu m.

3. The blower with corrosion resistance according to claim 1, wherein: the first protective coating (4) is formed by thermal spraying.

4. The blower with corrosion resistance according to claim 1, wherein: the corrosion-resistant coating is a nickel-based corrosion-resistant alloy.

5. The blower with corrosion resistance according to claim 1, wherein: the wear-resistant and corrosion-resistant coating is tungsten carbide-cobalt-chromium alloy.

6. The blower with corrosion resistant function of claim 5, wherein: the closed pore coating is a ceramifiable precursor polymer.