[Q&A Question 213] 2018.08.07
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【Q&A Question 213】August 7, 2018: Briefly describe what the function of a valve spring is At the end of the compression stage’s intake process or the exhaust stage’s process, the force exerted by the valve spring causes the intake valve or exhaust valve to settle onto its seat in a timely manner, thereby creating a seal to prevent gas from flowing back. A preload pressure is generated to ensure the sealing of the valve disc against the valve seat, because only when this preload pressure holds the valve disc firmly in place against the valve seat can a backpressure difference be created on both sides of the valve disc; it is this backpressure difference that constitutes the main sealing force keeping the valve disc pressed against the valve seat. Reduce the impact of the valve disc on the lift baffle when it opens. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
It ensures the sealing between the valve disc and the valve seat, preventing the valve from escaping the control of the valve timing cam due to inertial forces, while also minimizing the impact force on the valve seat when the valve closes.
Use the elastic force of the spring to compress the air valve
A. Ensure the air valve closes B. Make the air valve move in conjunction with the cam
It ensures the sealing between the valve disc and the valve seat, preventing the valve from escaping the control of the valve timing cam due to inertial forces, while also minimizing the impact force on the valve seat when the valve closes.
At the end of the compression stage’s intake process or the exhaust stage’s process, the force exerted by the valve spring causes the intake valve or exhaust valve to settle onto its seat in a timely manner, thereby creating a seal to prevent gas from flowing back. A preload pressure is generated to ensure the sealing of the valve disc against the valve seat, because only when this preload pressure holds the valve disc firmly in place against the valve seat can a backpressure difference be created on both sides of the valve disc; it is this backpressure difference that constitutes the main sealing force keeping the valve disc pressed against the valve seat. Reduce the impact of the valve disc on the lift baffle when it opens.
When the air valve is closed, it pushes the valve disc downward toward the valve seat; when the valve disc is open, it prevents the valve disc from hitting the lift limiter
Use the elastic force of the spring to compress the air valve
Ensure the gas valve is closed； Make the valve move in accordance with the motion of the cam
It ensures the sealing between the valve disc and the valve seat, preventing the valve from escaping the control of the valve timing cam due to inertial forces, while also minimizing the impact force on the valve seat when the valve closes.