UE压力表故障原因及排除方法

1、指针归零失效,零位误差大

力表在使用的过程中经常会出现不归零的情况,即在没有外界负压的情况下,力表指针会指向-个压力值读数,如果偏差值

测量允许,就会对测量结果造成较大干扰,影响生产或者生活,甚至会导致安全隐患的发生。压力表出现不归零故障的原因及排

除故障的方法如下:

(1 )压力负载压力过大,导致弹簧管形变量过弹性系数允许值,出现不可回弹的变形。该类故障的解决措施为:取下指针，

将指针指向零位重新安装,进行测试,若校准后性能仍达不到使用要求,则需要更换弹簧管;

(2 )压力表出现晃动现象。-般 是由于压力表的固定螺丝松动,使用*工具紧固安装螺丝即可;

(3)压力表内齿轮脱牙。一般是由于压力表扇形齿轮 与齿轮轴的啮合齿数过少导致的, 需要拆开压力表更换齿轮,并调整好齿

轮与齿轮轴的啮合齿数;

( 4)指针指示端出现变形。该故障主要是因压力表的负载压力变化过大导致,需要拆开压力表更换指针; 

(5)工作- -段时间后内部腔体被阻塞,需要清理通道。

2、指针的指示端处于零位止挡销之后

力表在工作-段时间后会偶发指针指示端位于表盘内零位止挡销以后的现象。该故障主要是由于压力表的指针与刻度盘间距过

大或者指针强度不够,当压力表出现剧烈振动时指针跳过止挡销, 跳到止挡销之后并无法自行复位。解决办法为:轻轻拆开压力

表保护盖,将指针抬起拨至零位止挡销处,调整指针与刻度盘之间的距离,避免同样故障的再次发生。

Reasons and troubleshooting methods for UE pressure gauge faults

1. Pointer zeroing failure, large zero position error

During the use of a force gauge, there is often a situation where it does not return to zero. In the absence of external negative pressure, the pointer of the force gauge will point to a pressure reading. If there is a deviation value

If measurement is allowed, it will cause significant interference to the measurement results, affect production or daily life, and even lead to the occurrence of safety hazards. The causes and troubleshooting of pressure gauge failure to return to zero

The methods for troubleshooting are as follows:

(1) The pressure load pressure is too high, causing the deformation of the spring tube shape to exceed the allowable value of the elastic coefficient, resulting in non rebound deformation. The solution to this type of malfunction is to remove the pointer,

Point the pointer to the zero position and reinstall for testing. If the performance still does not meet the requirements after calibration, the spring tube needs to be replaced;

(2) The pressure gauge shows shaking phenomenon- Usually, due to the loosening of the fixing screws on the pressure gauge, use a tool to tighten the installation screws;

(3) The gear inside the pressure gauge is dislodged. Usually, it is caused by the insufficient number of meshing teeth between the pressure gauge sector gear and the gear shaft. It is necessary to disassemble the pressure gauge to replace the gear and adjust the teeth properly

The number of teeth engaged between the wheel and gear shaft;

(4) The pointer indicates deformation at the end. The fault is mainly caused by excessive changes in the load pressure of the pressure gauge, which requires disassembling the pressure gauge to replace the pointer;

(5) Work - After a period of time, the internal cavity is blocked and the channel needs to be cleaned.

2. The indicator end of the pointer is located after the zero stop pin

After working for a period of time, the force gauge occasionally experiences a phenomenon where the pointer indicator end is located behind the zero stop pin inside the dial. The fault is mainly due to the excessive distance between the pointer of the pressure gauge and the dial

When the pressure gauge vibrates violently, the pointer may skip the stop pin and cannot reset itself after jumping to the stop pin due to the large or insufficient strength of the pointer. The solution is to gently remove the pressure

Protect the watch cover by lifting the pointer to the zero stop pin and adjusting the distance between the pointer and the dial to prevent the same malfunction from happening again.

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