The 6th Institute of Aerospace Science and Technology developed a high pressure solenoid valve for deep sea blowout preventer testing
Brake Pads convert the kinetic energy of
the vehicle to thermal energy through friction. Two brake pads
are contained in the brake caliper, with their friction surfaces facing
the rotor. When the brakes are hydraulically applied, the
caliper clamps or squeezes the two pads together onto the spinning rotor to
slow and stop the vehicle. When a brake pad heats up due to contact with
the rotor, it transfers small amounts of its friction material onto the
disc, leaving a dull grey coating on it. The brake pad and disc (both now
having the friction material), then "stick" to each other, providing
the friction that stops the vehicle.
In disc brakes, there are usually two brake pads per disc rotor.
These are held in place and actuated by a caliper affixed to the wheel hub
or suspension upright. Racing calipers, however, can utilize up to
six pads, with varying frictional properties in a staggered pattern for optimum
performance. Depending on the properties of the material, the weight of the
vehicle and the speeds it is driven at, disc wear rates may vary. The brake
pads must usually be replaced regularly (depending on pad material) to prevent
brake fade. Most brake pads are equipped with a method of alerting the driver
when this needs to be done. A common technique is manufacturing a small central
groove whose eventual disappearance by wear indicates the end of a pad's
service life. Other methods include placing a thin strip of soft metal in a
groove, such that when exposed (due to wear) the brakes squeal audibly. A soft
metal wear tab can also be embedded in the pad material that closes an electric
circuit when the brake pad wears thin, lighting a dashboard warning light.
Brake Pads Brake Pads,Rear Brake Pads,Front Brake Pads,Changing Brake Pads LIXIN INDUSTRIAL & TRADE CO.,Limited , https://www.kgvsparkplug.com
The solenoid valve is another high-pressure solenoid valve product that is applied to a submarine integrated auxiliary equipment solenoid valve and is suitable for a 3,000-meter submarine environment. The successful R&D of this product has broken the monopoly of foreign countries and has provided powerful help for the development of deep sea drilling and oil and gas development technology in China.
In deepwater drilling operations in oceans, deep-water solenoid valves directly control the start-up of deep-water blowout preventer units, and at the same time work long-term at 3,000 meters underwater. They need to withstand deep-water, low-temperature, and seawater corrosion for long periods of time. These are key equipment for ensuring the safety and reliability of deepwater drilling operations. Requires fast response and high reliability. Due to the high deep-water pressure, deep-water solenoid valves are required to have good high pressure and sealing performance. Due to high technical requirements and difficulties, the product had only been produced by a few companies in the United States and Germany.
The company used the advantages of rocket engine technology, insisted on technological innovation, solved the corrosion problem of seawater solenoid valve in seawater medium, successfully developed the solenoid valve product, and significantly reduced the production cost of the product and improved the product reliability. .
(Original title: Research and Development of High-pressure Solenoid Valves Used in Deep-sea Production BOPs of the Sixth Academy of Aerospace Technology)