Optimize the hysteresis adjustment accuracy of the vacuum pressure switch

Optimizing the hysteresis adjustment accuracy of vacuum pressure switches is crucial for ensuring their accurate and stable operation. This can be achieved by optimizing the structural design, selecting high-quality components, improving the adjustment device, conducting precise calibration, enhancing environmental adaptability, and doing a good job in daily maintenance.

Optimize structural design

Rational layout of internal components: When designing a vacuum pressure switch, the positional relationship and interaction among each component should be fully considered. For instance, the distance between the pressure-sensing element and the regulating device should be controlled within a reasonable range to reduce the regulating error caused by signal transmission delay or interference. At the same time, avoid mutual squeezing or collision between internal components to ensure that all parts can work normally.

Optimize the spring design: The spring is one of the key components that affect the accuracy of hysteresis adjustment. The elastic force characteristics of the spring can be changed by adjusting parameters such as the material, wire diameter and number of turns of the spring. For instance, select spring materials with more stable elastic modulus and better fatigue resistance, or precisely calculate the number of turns and wire diameter of the spring to make the deformation of the spring under different pressures more accurate, thereby enhancing the precision of hysteresis adjustment.

Select high-quality components

High-precision pressure sensing element: The pressure sensing element is the core component of the vacuum pressure switch, and its accuracy directly affects the accuracy of hysteresis regulation. High-precision and stable pressure sensing elements should be selected, such as high-precision piezoresistive or piezoelectric pressure sensors. These sensors can sense pressure changes more accurately and convert pressure signals into electrical signals, providing reliable data support for subsequent regulation.

High-quality regulating components: The parts in the regulating device, such as regulating screws and sliders, should also be selected from reliable quality products. High-quality regulating components have better processing accuracy and surface quality, which can reduce friction and wear, and improve the sensitivity and accuracy of regulation. For instance, the use of precisely processed stainless steel adjusting screws can ensure stability and accuracy during the adjustment process.

Improve the regulating device

Adopt high-precision regulating mechanisms: Traditional regulating devices may have problems such as low regulating accuracy and poor stability. High-precision adjustment mechanisms can be considered, such as worm gear and worm adjustment devices or differential head adjustment devices. These regulating mechanisms have a higher transmission ratio and regulating accuracy, and are capable of achieving more precise hysteresis regulation. For example, the differential head adjustment device can achieve tiny displacement adjustment by rotating the differential cylinder, thereby precisely controlling the hysteresis size.

Add a regulation feedback mechanism: To further enhance the regulation accuracy, a feedback mechanism can be added to the regulation device. For instance, install position sensors or force sensors to monitor the position and force conditions of the regulating components in real time, and transmit the feedback signals to the control system. The control system automatically adjusts the regulation parameters based on the feedback signal, making the hysteresis regulation more accurate and stable.

Carry out precise calibration

Establish a standard calibration process: Develop a scientific and standardized calibration process to ensure that each calibration is carried out in accordance with a unified standard. During the calibration process, high-precision calibration equipment such as standard pressure gauges and digital multimeters should be used. First, connect the vacuum pressure switch to the calibration equipment, apply a series of known standard pressure values, and record the operating pressure and reset pressure of the switch. Then, adjust the regulating device according to the set hysteresis value to make the hysteresis of the switch meet the requirements.

Multiple calibrations and verifications: To enhance the accuracy of calibration, multiple calibrations can be conducted, and the calibration results can be verified. For example, calibrate under different environmental temperatures and pressures to check whether the hysteresis of the switch is stable. If any deviation in the calibration results is found, the cause should be analyzed promptly and the calibration should be recalibrated until the hysteresis adjustment accuracy meets the requirements.

Strengthen environmental adaptability

Temperature compensation measures: Changes in ambient temperature can affect the performance of vacuum pressure switches, leading to a decrease in the accuracy of hysteretic regulation. Temperature compensation measures can be taken, such as installing temperature sensors inside the switch to monitor temperature changes in real time and automatically adjust the regulation parameters through the control system. For instance, when the temperature rises, the control system can appropriately increase the regulation amount to compensate for the pressure deviation caused by temperature changes, thereby ensuring the accuracy of hysteresis regulation.

Moisture-proof and dust-proof design: Damp and dusty environments can cause damage to the insulation performance and mechanical components of the switch, affecting the accuracy of backlash regulation. Therefore, when designing switches, moisture-proof and dust-proof designs should be adopted, such as sealed casings and moisture-proof coatings. Meanwhile, during the usage process, it is necessary to pay attention to keeping the surrounding environment of the switch clean and dry to prevent dust and moisture from entering the interior of the switch.

Do a good job in daily maintenance

Regular inspection and cleaning: Regularly inspect and clean the vacuum pressure switch to ensure the normal operation of its internal components. Check whether the regulating device is loose, worn or not. If necessary, make adjustments or replacements in a timely manner. Clean the dust, oil stains and other impurities on the surface and inside of the switch to prevent impurities from affecting the performance of the switch.

Record operation data: Establish an operation file for the switch and record its operation data, such as pressure value, hysteresis value, calibration time, etc. Through the analysis of the operation data, the performance change trend of the switch can be discovered in a timely manner, and measures can be taken in advance for maintenance and adjustment to ensure that the hysteresis regulation accuracy is always in a good state.