1 Scope
This part of JB/T 8941 specifies the terminologies and definitions, requirements, test methods, inspection rules, marking, packaging, keeping and warranty period of roots type blowers for general purpose (including single-stage, double-stage, package, positive pressure and negative pressure blowers).
This part is applicable to roots type blower for general purpose conveying air and neutral nontoxic, non-explosive gas (hereinafter referred to as blower). The inlet temperature of blower shall not be higher than 45℃, the content of solid particle in gas shall not be greater than 100mg/m3, the maximum dimension of particles shall not be greater than half of the minimum working clearance of each relative moving components in cylinder of blower.
2 Normative References
The following documents for the application of this document are essential. Any dated references, just dated editions apply to this document. For undated references, the latest editions (including any amendments) apply to this document.
GB/T 2888 Methods of Noise Measurement for Fans Blowers Compressors and Roots Blowers
GB/T 10095.1-2008 Cylindrical Gears-System of Accuracy-Part 1: Definitions and Allowable Values of Deviations Relevant to Corresponding Flanks of Gear Teeth
GB/T 10095.2-2008 Cylindrical Gears-System of Accuracy-Part 2: Definitions and Allowable Values of Deviations Relevant to Radial Composite Deviations and Runout Information
GB/T 13306 Plates
JB/T 6444 General Specifications for Packaging of Fans Blowers Compressors
JB/T 8941.2 Roots Type Blower for General Purpose - Part 2: Performance Test Methods
3 Terminologies and Definitions
Foreword I
1 Scope
2 Normative References
3 Terminologies and Definitions
4 Requirements
4.1 Basic Requirements of Design
4.2 Performance Requirements
4.3 Manufacturing Requirements
4.4 Assembling Requirements
5 Test Methods
6 Inspection Rules
7 Marking, Packing and Keeping
8 Warranty Period
Table 1 Permissible Deviation of Volume Flow Rate and Specific Energy
Table 2 Misalignment Limit
Table 3 Cleanness Limit of Parts
