高压阀一般采用加工简单，阀座一致和更换容易，单一导向结构的角度形状的单一座位结构。 阀的角单座结构适用于流路简单、阻力小、压力差大的流体，包括高粘度和悬浮物质以及粒子状物质，可以避免焦化和堵塞，并且适用于自清洗和清洗。 阀芯和阀座是高压阀开关控制的两个芯部件，形成高压阀开关的动态密封对。 阀的通道可以通过控制阀中心和阀座之间圆锥体的密封表面的接触和分离而封闭和打开。 阀芯和密封圈之间的圆形盖用于形成阀的滑动密封对，以确保阀腔和外部密封。 阀的中心是针状的，由尖细的表面密封。 一般来说，阀芯的圆锥角为59度，阀座的圆锥角为60度。 在该实验中，打开锥形孔以45~60选择锥形角度，孔缘的应力集中系数小，在锥形孔的小端出现应力。 阀座的大锥角、阀芯的小锥角和密封上部有利于延长阀的寿命。
阀指令未变更，伺服卡和伺服阀可能发生问题。 阀指令未变更，伺服卡的输出稳定时，伺服阀可能堆叠或油马达附着在阀上。 伺服卡输出抖动时，伺服卡的过度PI参数和阀位置反馈的变动( LVDT故障、LVDT屏蔽不良等)可能会成为问题。 、伺服卡故障。
阀指令本身发生变更时，需要查明指令抖动的原因。 如果在网格连接之前出现命令波动，原因如下:过冲的速度PI参数太多。 由于转速通道的故障，转速信号的变动异常，引起转速环的输出变动。 但是，速度通道故障的原因可能是磁阻探针故障、低速屏蔽等。 但是，阀位置指令在连接后发生变动时，其原因可能是电力和压力回路的不合理的PI参数导致过冲。 阀门在流动曲线的拐点工作。 一次频率调制速度变动; 远程操作指示波动等
There are many types of high-pressure valve, and the application in our life is very wide, then you high-pressure valve failure problem know how much? The following let Xiaobian to introduce for you about Hangzhou high-pressure Valve troubleshooting content. Hangzhou high-pressure Valve, high-pressure valve generally used processing simple, valve seat consistent and easy to replace, a single guide structure angle shape of a single seat structure. The angle single seat structure of the valve is suitable for simple flow path, low resistance, large pressure difference of fluid, including high viscosity and suspended matter and particulate matter, can avoid coking and clogging, and is suitable for self-cleaning and cleaning. The valve core and the valve seat are two core components of the high-pressure valve switch control, forming the dynamic sealing pair of the high-pressure valve switch. The valve passage can be closed and opened by controlling contact and separation of the sealing surface of the cone between the Valve Center and the seat. The circular cover between the SPOOL and the seal ring is used to form a sliding seal pair to ensure the valve cavity and external seal. The center of the Valve is needle-shaped and sealed by a tapering surface. Generally speaking, the cone angle of the spool is 59 degrees, the cone angle of the valve seat is 60 degrees. In this experiment, the cone angle is 45 ~ 60 when opening the cone hole, the stress concentration coefficient of the hole edge is small, and the stress appears at the small end of the cone hole. The Big Cone Angle of the valve seat, the small Cone Angle of the valve core and the upper part of the seal are favorable for prolonging the service life of the valve. The valve instructions have not been changed and there may be problems with the Servo card and servo valve. Valve instructions have not changed, Servo card output stability, servo valve may stack or oil motor attached to the valve. When the output of the Servo Card Jitter, the excessive Pi parameter of the SERVO card, the change of the valve position feedback LVDT fault, the bad shielding of Lvdt may become a problem. . SERVO card failure. When the valve instruction itself changes, it is necessary to find out the cause of the instruction jitter. If the command fluctuates before the grid connection, the reason is as follows: there are too many overshoot speed Pi parameters. Because of the fault of the speed channel, the abnormal change of the speed signal causes the change of the output of the speed ring. However, the failure of the speed channel may be caused by the magnetoresistive probe failure, low-speed shielding, and so on. However, when the valve position instruction changes after the connection, the reason may be that the unreasonable Pi parameters of the power and pressure circuits lead to overshoot. The valve operates at the inflection point of the flow curve. Modulation speed change of primary frequency, fluctuation of remote operation indication, etc.