Formula of polyimide coating for Roots blower, Roots blower and coating technology
A polyimide coating, polyimide technology, applied in the direction of coating, machine/engine, mechanical equipment, etc., can solve the problem of maintenance between 0.10-0.15mm, pure metal impeller oxidation corrosion, fan life fan Influence and other issues to achieve the effect of improving the efficiency of the fan
Active Publication Date: 2016-10-12
浙江正林机械制造有限公司
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Problems solved by technology
[0003] The impeller and shell of the traditional Roots blower are pure metal. If the gap between the matching end faces is too small, the fan will be stuck, and if it is too large, the efficiency of the fan will be low. Therefore, the efficiency of the fan depends entirely on the machining accuracy of the machine tool.
At present, the relatively advanced two-way curved surface planer machining center in China can only maintain the gap between the mating end faces between 0.10-0.15mm
In addition, the pure metal impeller is easily oxidized and corroded, resulting in the fan life being affected by the environment in which the fan is used
Method used
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[0026] Combine now figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 The present invention is further described, a polyimide composite coating formulation for Roots blower, by mass percentage, including the following components: 20-80% polyimide, 0-30% polysulfone , 10-50% polyether ether ketone, 0-20% graphite, 5-20% lubricant molybdenum disulfide. Molybdenum disulfide is used as a lubricant to reduce the friction coefficient of the coating.
[0027] A kind of coating process of the polyimide composite coating formula of Roots blower, comprises the following steps:
[0028] (1) Prepare and mix polyimide coating according to the above formula of polyimide composite coating;
[0029] (2) Preheat the workpiece at 120°C for 20 minutes;
[0030] (3) Spray polyimide paint on the preheated workpiece surface;
[0031] (4) Place the workpiece sprayed with polyimide coating at 180°C for 60 minutes to desolventize, and release the air in the coating;
[0032]...
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Abstract
The invention provides a formula of a polyimide coating for a Roots blower, the Roots blower and a coating technology. The surface of a drive vane wheel, the surface of a driven vane wheel and the inner wall of a case are coated with the polyimide coatings, therefore, a gap between the two vane wheels and gaps between the vane wheels and the case are reduced to 0-0.05 mm, and the efficiency of the blower is greatly improved. The coating has the advantages of being resistant to wear, low in friction coefficient, resistant to corrosion, resistant to high temperature and the like, contact among the coatings is flexible, low friction is generated, and the phenomenon that metal vane wheel frameworks are deformed due to collision or corroded by external oxidation is avoided.
Description
[0001] The invention relates to the technical field of Roots blowers, in particular to a polyimide composite coating formula for Roots blowers, Roots blowers and a coating process. Background technique [0002] The working efficiency of the Roots blower depends on the gap between the two impellers and the gap between the impeller and the casing. The gap will cause the fan to generate backflow, that is to say, the smaller the gap, the higher the working efficiency of the fan. [0003] The impeller and shell of the traditional Roots blower are pure metal. If the gap between the matching end faces is too small, the fan will be stuck, and if it is too large, the efficiency of the fan will be low. Therefore, the efficiency of the fan depends entirely on the machining accuracy of the machine tool. At present, the relatively advanced two-way curved surface planer machining center in China can only maintain the gap between the mating end faces at 0.10-0.15mm. In addition, pure metal i...
Claims
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IPC IPC(8): C09D179/08C09D181/06C09D161/16C09D7/12C09D5/08C09D5/18F04C18/14
CPCC08L2201/08C08L2205/03C09D5/08C09D5/18C09D7/61C09D179/08F04C18/14C08L81/06C08L61/16C08K3/04C08K2003/3009
Inventor 林翔
Owner 浙江正林机械制造有限公司