JB/T 51115-1999
Diesel engines - Hydraulic speed governors - Product quality grading (Internal use)
柴油机 液压调速器 产品质量分等（内部使用）
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 质量指标 → 4 试验方法 → 5 检验规则 Foreword → 1 Scope → 2 Normative References → 3 Quality Indicators → 4 Test Methods → 5 Inspection Rules
Scope
This standard specifies the quality indicators, test methods, and inspection rules for the product quality of diesel engine hydraulic speed governor assemblies. This standard applies to the quality inspection and grade evaluation of diesel engine hydraulic speed governor (hereinafter referred to as hydraulic speed governor) assemblies.
本标准规定了柴油机液压调速器总成产品质量的质量指标、试验方法、检验规则。本标准适用于柴油机液压调速器（以下简称液压调速器）总成产品质量的检测和等级评定。
Normative References
Keywords
Application Summary AI generated
Diesel engine manufacturers and testing agencies use this standard to grade the quality of hydraulic speed governors, ensuring products meet qualified, first-class, or superior levels. It provides unified test methods and inspection rules, helping users select reliable products and driving industry quality improvement.
柴油机制造商和检测机构使用本标准来评定液压调速器的质量等级，确保产品符合合格品、一等品或优等品的要求。它通过统一的试验方法和检验规则，帮助用户选择可靠的产品，并推动行业质量提升。
AI Summary AI generated
This standard specifies quality indicators, test methods, and inspection rules for diesel engine hydraulic speed governor assemblies, classifying products into three grades: qualified, first-class, and superior. Key requirements include cleanliness limits (e.g., 100 mg for qualified), speed fluctuation rate, and zero-position error of the steady-state speed regulation mechanism. Test methods cover cleanliness measurement, sealing checks, and performance tests. Inspection rules use sampling plans with A, B, and C nonconformity categories. The standard applies to quality inspection and grading, aiming to unify industry quality requirements.
本标准规定了柴油机液压调速器总成的质量指标、试验方法和检验规则，将产品分为合格品、一等品和优等品三个等级。关键要求包括清洁度限值（如合格品100 mg）、转速波动率、稳态调速率机构零位误差等。试验方法涵盖清洁度测定、密封性检查、性能测试等。检验规则采用计数抽样方案，按A、B、C三类不合格进行判定。标准适用于液压调速器的质量检测和等级评定，旨在统一行业质量要求。
Key Sentences extracted from text
本标准规定了柴油机液压调速器总成产品质量的质量指标、试验方法、检验规则。
液压调速器产品按其不同的产品质量定为合格品、一等品、优等品三个等级。
液压调速器内腔的清洁度限值：合格品为100 mg，一等品为80 mg，优等品为50 mg。
稳态调速率机构零位置时的最大允许转速下降应小于或等于3 r/min，不允许有升速现象。
在用户遵照使用说明书正常使用与保养条件下，保用期为出厂之日起12个月；第一次大修期应大于或等于30 000 h。
This standard specifies the quality indicators, test methods, and inspection rules for the product quality of diesel engine hydraulic speed governor assemblies.
Hydraulic speed governor products are classified into three grades according to their product quality: qualified product, first-class product, and superior product.
The cleanliness limit of the hydraulic speed governor cavity: qualified product is 100 mg, first-class product is 80 mg, and superior product is 50 mg.
The maximum allowable speed drop at the zero position of the steady-state speed regulation mechanism shall be less than or equal to 3 r/min, and no speed increase is allowed.
Under the conditions of normal use and maintenance by the user in accordance with the instruction manual, the warranty period is 12 months from the date of factory delivery; the first major overhaul period shall be greater than or equal to 30,000 h.
Standard Timeline
Changes from replaced version:
- 对原标准作了编辑性修改，主要技术内容没有变化
- Editorial modifications were made to the original standard, with no changes to the main technical content.