(Daily Question) Coal-to-oil and olefins forum, 2018.2.19
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3.jpg Participation: Prize of 5 Wealth； Correct answer: Reward of 10 wealth points ； Note: This post is valid for 48 hours. Question: (DMTO) Olefin separation unit: What is the structure of the accumulator in the turbine lubricating oil system? The accumulator consists of a balloon made of synthetic rubber housed within a stainless steel body, with dry nitrogen being filled into the balloon through an inflation valve on the housing. When conducting tests on the control system before starting the turbine, the bladder of the accumulator should first be filled with nitrogen, and the nitrogen pressure should be 60% of the pressure in the lubricating oil main line. For example, if the total pressure in the unit’s oil main line is 2.0 Mpa, then the nitrogen pressure in the accumulator’s bladder should be 1.2 Mpa. The lower end of the housing is connected to the pressure oil return pipe, and the balloon separates the gas chamber from the oil chamber, serving to isolate the gas and oil. Since the synthetic rubber balloon can be deformed arbitrarily as nitrogen is compressed or expanded, it enables the accumulator to act as a buffer in the return oil line, maintaining stable oil pressure and reducing pressure fluctuations in the return oil line. When the nitrogen pressure in the balloon drops below 30% of the pressure in the return oil line manifold, it is necessary to refill it with nitrogen to ensure the proper and stable operation of the control system. Note: The answers will be released automatically in two days!
Answer: A reservoir is an energy storage device in hydraulic and pneumatic systems. It converts the energy in the system into compressed energy or potential energy and stores it at the appropriate time; when the system needs it, it transforms this compressed energy or potential energy back into forms such as hydraulic or pneumatic energy, which is then released to replenish the system. When the pressure in the system increases suddenly, it can absorb this amount of energy to maintain normal pressure throughout the system. Airbag-type accumulator structure: The airbag is installed at the upper part inside the housing, and nitrogen is filled into the airbag via a filling valve; the filling valve closes when the accumulator is in operation. At the lower part of the housing, there is a limit valve that allows oil to flow through it into the accumulator, while also preventing the air bag from expanding and coming out of the housing when all the oil is drained. During operation, pressure oil pushes open the mushroom-shaped limit valve through the lower inlet and enters the accumulator to compress the air bag; the gas inside the bag is compressed, thereby storing energy ； When the system pressure is lower than the accumulator pressure, the air bag expands to release pressure oil, and the accumulator releases energy. It is characterized by low airbag inertia and rapid response, enabling it to absorb sudden pressure shocks and pulsations; it is also small in size, light in weight, and easy to install.
Sack-type: It contains a sack that separates the oil chamber from the air chamber, as shown in the diagram. The designed capacity can be large or small; it is primarily used to absorb shock vibrations in oil pipelines and to supply oil to hydraulic components in a short period of time. This type of accumulator requires the pressure inside its bladder to be checked every 1 to 2 years; when the pressure falls below the required level, air must be added.
A accumulator is an energy storage device in hydraulic and pneumatic systems. It converts the energy in the system into compressed energy or potential energy and stores it at the appropriate time; when the system needs it, it transforms this compressed energy or potential energy back into forms such as hydraulic or pneumatic energy, which is then released to replenish the system. When the pressure in the system increases suddenly, it can absorb this amount of energy to maintain normal pressure throughout the system. Airbag-type accumulator structure: The airbag is installed at the upper part inside the housing, and nitrogen is filled into the airbag via a filling valve; the filling valve closes when the accumulator is in operation. At the lower part of the housing, there is a limit valve that allows oil to flow through it into the accumulator, while also preventing the air bag from expanding and coming out of the housing when all the oil is drained. During operation, pressure oil pushes open the mushroom-shaped limit valve through the lower inlet and enters the accumulator to compress the air bag; the gas inside the bag is compressed, thereby storing energy ； When the system pressure is lower than the accumulator pressure, the air bag expands to release pressure oil, and the accumulator releases energy. It features low inertia of the air bag, rapid response, the ability to absorb sudden pressure shocks and pulsations, a small size, light weight, and easy installation
The basic structure of an accumulator is that it contains a capsule inside, and at the top of this capsule there is a filling port; this port passes through the outer shell of the accumulator, allowing it to be filled from the outside. There is a metal support at the bottom of the capsule, with the liquid acting beneath it. Before use, inflate the accumulator in accordance with the manufacturer’s requirements. When the hydraulic pressure is greater than the air pressure, the air bag contracts and the hydraulic pressure drops. When the air pressure is greater than the hydraulic pressure, the air bag expands and the hydraulic pressure rises.
The internal structure of the accumulator in the compressor oil circuit is quite simple; it contains a rubber bladder that serves to stabilize the oil pressure, ensuring that the speed of the unit remains constant even when there are fluctuations in oil pressure. The interior of the casing is filled with nitrogen, at a pressure that is 0.75 times the pressure in the lubricating oil main line. When the lubricating oil pump starts, the outside of the bladder is filled with lubricating oil. Its function is to cause the bladder to expand rapidly when the oil pressure drops suddenly, thereby providing immediate compensation for the lubricant pressure.
The basic structure of an accumulator is that it contains a capsule inside, and at the top of this capsule there is a filling port; this port passes through the outer shell of the accumulator, allowing it to be filled from the outside. There is a metal support at the bottom of the capsule, with the liquid acting beneath it. Before use, inflate the accumulator in accordance with the manufacturer’s requirements. When the hydraulic pressure is greater than the air pressure, the air bag contracts and the hydraulic pressure drops. When the air pressure is greater than the hydraulic pressure, the air bag expands and the hydraulic pressure rises.
When there are brief fluctuations in oil pressure within the lubrication system, it can act as a buffer to reduce the amplitude of these fluctuations, thereby maintaining relatively stable pressure in the main lubrication lines. This helps to prevent unnecessary actions such as shutdown due to low oil pressure or automatic startup of auxiliary pumps, thus enhancing the stability of the lubrication system
The accumulator consists of a balloon made of synthetic rubber housed within a stainless steel body, with dry nitrogen being filled into the balloon through an inflation valve on the housing. When conducting tests on the control system before starting the turbine, the bladder of the accumulator should first be filled with nitrogen, and the nitrogen pressure should be 60% of the pressure in the lubricating oil main line. For example, if the total pressure in the unit’s oil main line is 2.0 Mpa, then the nitrogen pressure in the accumulator’s bladder should be 1.2 Mpa. The lower end of the housing is connected to the pressure oil return pipe, and the balloon separates the gas chamber from the oil chamber, serving to isolate the gas and oil. Since the synthetic rubber balloon can be deformed arbitrarily as nitrogen is compressed or expanded, it enables the accumulator to act as a buffer in the return oil line, maintaining stable oil pressure and reducing pressure fluctuations in the return oil line. When the nitrogen pressure in the balloon drops below 30% of the pressure in the return oil line manifold, it is necessary to refill it with nitrogen to ensure the proper and stable operation of the control system
The basic structure of an accumulator is that it contains a capsule inside, and at the top of this capsule there is a filling port; this port passes through the outer shell of the accumulator, allowing it to be filled from the outside. There is a metal support at the bottom of the capsule, with the liquid acting beneath it. Before use, inflate the accumulator in accordance with the manufacturer’s requirements. When the hydraulic pressure is greater than the air pressure, the air bag contracts and the hydraulic pressure drops. When the air pressure is greater than the hydraulic pressure, the air bag expands and the hydraulic pressure rises. It is primarily used in the hydraulic control systems of power plants; it functions to maintain system pressure when the operating conditions of the system change, serving as an auxiliary power source and absorption source.
A accumulator is an energy storage device in hydraulic and pneumatic systems. It converts the energy in the system into compressed energy or potential energy and stores it at the appropriate time; when the system needs it, it transforms this compressed energy or potential energy back into forms such as hydraulic or pneumatic energy, which is then released to replenish the system. When the pressure in the system increases suddenly, it can absorb this amount of energy to maintain normal pressure throughout the system. Airbag-type accumulator structure: The airbag is installed at the upper part inside the housing, and nitrogen is filled into the airbag via a filling valve; the filling valve closes when the accumulator is in operation. At the lower part of the housing, there is a limit valve that allows oil to flow through it into the accumulator, while also preventing the air bag from expanding and coming out of the housing when all the oil is drained. During operation, pressure oil pushes open the mushroom-shaped limit valve through the lower inlet and enters the accumulator to compress the air bag; the gas inside the bag is compressed, thereby storing energy ； When the system pressure is lower than the accumulator pressure, the air bag expands to release pressure oil, and the accumulator releases energy. It features low inertia of the air bag, rapid response, the ability to absorb sudden pressure shocks and pulsations, a small size, light weight, and easy installation