Silicone rubber composite insulator for high-speed locomotive and manufacturing method thereof

Abstract

The invention discloses a silicone rubber compound insulator for a high-speed locomotive and a manufacturing method thereof. The silicone rubber compound insulator for the high-speed locomotive comprises outer insulating umbrella skirts with reinforcing ribs, an upper end part accessory with an inverted cone and an anti-twisting section, an inner insulating mandrel which is matched with the upper end part accessory and has a corresponding structure, a lower end part accessory with an inverted cone and a threaded lock catch structure, a lock sleeve, and an insulating enclosed substrate with an inner hole. The method comprises the following steps: manufacturing the outer insulating umbrella skirts with the reinforcing ribs; processing the inverted cone and the anti-twisting section of the upper end part accessory and the corresponding structure of the inner insulating mandrel matched with the upper end part accessory; processing the inverted core and the threaded lock catch structure of the lower end part accessory; manufacturing the insulating enclosed substrate; assembling a product. The manufacturing method is easy and safe, and the manufactured product has reliable mechanical performance and stable electric performance; high wind load deformation resistance is achieved, and the stability of an entire traction power supply system can be well ensured even if a small quantity of stains are formed on the surface of the product.

Description

technical field [0001] The invention relates to a pantograph component and its manufacturing method for a high-speed locomotive (that is, a high-speed locomotive with a speed above 160km / h), specifically a pantograph, a busbar, a bridge cable, etc. used as insulating supports Silicone rubber composite insulator and manufacturing method thereof. Background technique [0002] Silicone rubber composite insulators mainly have three main components: silicone rubber sheds for external insulation, epoxy resin fiberglass rods for internal insulation, and metal accessories for connection at both ends. The outer insulating silicone rubber shed mainly plays the role of weather resistance, hydrophobicity, hydrophobic migration, increasing the creepage distance, etc. to increase the product life and improve the electrical performance of the product. The inner insulation mainly plays a rigid insulating support and resists bending and torsion. effect. Because of this, silicone rubber com...

AI Technical Summary

Problems solved by technology

[0003] Since ordinary silicone rubber composite insulators are integrally vulcanized and molded after crimping with fittings, when designing the shed of the silicone rubber composite insulator that is molded as a whole, it is necessary to design the split mold and the inclination angle of both sides of the shed, so the formed shed has The overall clamping seam, and because of the inclination design of the shed, the skirt at the top of the shed is thinner, prone to tearing and fatigue

There is also the situation that the electrical clearance of the product is shortened due to the raised fixing bolts during installation, which is not noticed during the design and production of the current common silicone rubber composite insulator, especially when the speed is above 160km / h. On high-speed locomotives, the defects of this product will have some safety hazards

At the same time, modern high-speed locomotives are constantly pursuing high-speed, stable, safe, and comfortable sports spaces. At the same time, the use of silicone rubber composite insulators is required. Silicone rubber composite insulators are required to meet the normal operating environment (atmospheric environmental pollution and wind and sand, rain, etc.) , snow, fog, dew, etc.) pollution, it should also be able to withstand the weight of the pantograph or connecting wires and the fatigue vibration generated when the locomotive is running and swinging. At the same time, when passing through tunnels, valleys, coal yards, acid rain and other harsh environments, the product There will be no short-term reduction or permanent damage to the electrical performance of the product, so the design of the product requires the metal accessories to have a large tensile load, strong torsion resistance, stable electrical performance, and excellent temperature resistance, so that it can be guaranteed The safe service life of silicone rubber composite insulators avoids the number of replacements and reduces unnecessary losses. For this situation, the usual design method is to use aluminum or hot-dip galvanized metal accessories at both ends and an inclination angle that is convenient for mold release. The design and general end accessories are crimped and formed. The design and manufacturing method is: first roughen the end of the epoxy resin mandrel or coat adhesive polymer materials such as epoxy resin, and then crimp the metal accessories on the The two ends of the epoxy resin mandrel are then coated and dried with a coupling agent, and finally the injection molding machine is used for integral injection molding, or the overall injection molding is performed first, and finally the metal accessories at both ends are crimped and formed. , but this design has the following problems: (1) The thickness of the shed is relatively thin, and it is easy to be torn or deformed irreversibly by the wind tunnel effect in tunnels and narrow valleys. Stabilizing the electric field plays a destructive role

(2) The product adopts integral vulcanization molding, and the longitudinal mold opening seam is unavoidable, which affects the tear strength of the outer insulating shed, and the electrical performance of the insulator will be reduced after contamination

(3) Ordinary crimping methods cannot meet the impact of vibration on product structure when high-speed locomotives are moving at high speed, resulting in potential safety hazards in products

(4) The actual installation situation was not considered in the design, resulting in the raised bolts directly reducing the electrical clearance of the insulator, resulting in a significant reduction in the electrical performance of the insulator

[0004] It can be seen that the existing silicone rubber composite insulators have poor mechanical strength of the outer shed, poor resistance to tensile displacement of end attachments, low torsion resistance of the product, decline in electrical performance of the product after shed outer pollution, unreasonable product shape design, and poor product quality. The design does not take into account the actual working conditions and other shortcomings

Images