在世界各地,各种各样的工业场合都使用背压调节器和减压调节器。 他们经常必须在极端环境中完美地工作,从接近赤道的高温气候到接近极地的相当寒冷气候。

如果监管者在上述任何一种情况下以及两者之间的环境都失败了,那么风险就很大。 向环境中释放液体可能代价高昂,与故障相关的压力损失会损害系统功能并提供严重的安全风险。

调节器测试方法

不同的调节器供应商有不同的测试能力。 由于不同行业之间没有公认的共同性能参数的单一标准测试,因此在各种调节器制造商的设备测试水平上存在相当大的差异。

相反,跨多种性能标准的量身定做的测试策略需要确保调节器在最不利的情况下能够按额定值工作。 利用预测建模从理论上预测性能特性,然后通过测试过程来证明这些想法,是一种很好的方法。 最重要的测试包括:

爆裂测试 在压力下保持完整性是压力调节器的主要和最重要的性能要求之一。 设计工程师可能相信,他们的设备将通过爆震试验来执行与他们的压力等级相符的性能,这种试验可以在远远高于预测的调节器工作压力的压力下进行。

考虑一个调节器,降低压力从6000psi在入口流到100psi在输出流。 对于设计者来说,为了保证出口压力恒定、可靠,发现调节器内部任何潜在的速度陷阱或压力建筑区域是非常关键的。 即使微小的内部设计误差也会导致输出流的压力损失和性能不佳,因为调节器本身测量了膜片所需的出口压力。

制造商研究调节器内的压力区,包括计算流体力学(CFD)和实际流量测试,以确保装置能根据系统要求正确读取和管理出口压力。 CFD利用数值分析数据结构来评估和解决流体流动和压力相关问题。 通过认识到这些可能的压力影响,设计者能够精确地创建一个调节器,以确保真正的出口压力与产品额定值相匹配——这最终反映了调节器的质量——的能力得到了提高。

测试供应压力的影响。 由进气压力变化引起的输出压力的变化称为进气压力效应(SPE),也称为进气依赖性。 如果进气压力下降,流出压力也会相应上升。 相反,如果进气压力上升,输出压力就会下降。

大多数监管机构在一定程度上受到SPE的影响,制造商有责任尽可能地预见和减少SPE。 大多数供应商都会给客户一些数据,显示每次进气压力变化时出口压力变化的程度。 SPE测试是调节器工程和设计的重要组成部分,以便产生最低限度的、最精确的可行值。

一旦安装完毕,操作员应该从调节器开始,在几个驱动周期内预测多年的性能。 可以使用一系列生命周期测试来确保调节器将按预期提供该级别的性能寿命。

工程师在生命周期测试期间可以在工作台上运行各种不同的循环负载,有时最高可达每秒120个循环。 目的是确定调节器何时何地开始出现磨损,从而影响性能。 工程师们可能利用这些信息更有效地制造出能抵抗预计磨损模式的调节器。
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https://www.marketwatch.com/press-release/this-report-on-washing-machine-stand-report-serves-as-a-reliable-business-tool-for-both-new-as-well-as-existing-players-2022-12-30

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