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Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is developed in accordance with the rules given in GB/T 1.1-2009. This standard replaces JB/T 8644-2007 Single screw pumps, and the following main technical changes have been made with respect to JB/T 8644-2007: ——the scope of this standard is modified (see Clause 1 hereof; Clause 1 of Edition 2007); ——the model and expression method are modified (see Sub-clause 3.1 hereof; Sub-clause 3.1 of Edition 2007); ——the relative sliding speed of the stator and rotor are changed to the sliding speed (see Sub-clause 3.4 hereof; Sub-clause 3.6 of Edition 2007); ——the volumetric efficiency and efficiency of large-sized and extra-large-sized pumps are modified (see Table 1 hereof; Table 1 of Edition 2007); ——the tolerance of flow rate is modified and the content “under the standard power and efficiency of shaft, the flow rate shall not be subjected to upper deviation control” is specified (see Sub-clause 4.2 hereof; Sub-clause 5.1 of Edition 2007); ——the requirements for the noise value of the pump are modified (see Sub-clause 4.6 hereof; Sub-clause 4.6 of Edition 2007); ——the recommended materials for stator and rotor are modified (see Table 3 hereof; Table 3 of Edition 2007); ——the temperature rise of the bearing is modified and the measuring point is specified (see Sub-clause 4.8.2 hereof; Sub-clause 4.14 of Edition 2007); ——the requirement that the pump body is not equipped with a safety valve is added (see Sub-clause 4.10 hereof); ——the load values of inlet and outlet flanges of pump in X, Y and Z directions are modified (see Table 4 hereof; Table 4 of Edition 2007); ——the requirements for pre-assembling and post-assembling of the pump are added (see Sub-clauses 4.12.2 and 4.12.5 hereof); ——the requirements for coupling installation and lifting components of equipment are added (see Sub-clauses 4.12.6 and 4.12.7 hereof); ——the painting requirements for pump are modified (see Sub-clause 4.13 hereof; Sub-clause 4.13 of Edition 2007); ——the requirements for prohibiting long-term operation of the pump in case of insufficient feed are added (see Sub-clause 4.14.2 hereof); ——the service life of the complete pump are changed from 1 year to 2 years, and the vulnerable parts are specified (see Sub-clause 4.14.4 hereof; Sub-clause 4.20 of Edition 2007); ——the requirements for the pump that is not subjected to NPSHR test are added (see Sub-clause 5.2 hereof); ——the requirements that when the pump test cannot be carried out by the manufacturer, the manufacturer can negotiate with the user to carry out the test on the user's site are added (see Sub-clause 5.6); ——the material inspection requirements are modified (see Sub-clause 6.1 hereof; Sub-clause 6.1 of Edition 2007); ——the end-of-factory test requirements and the storage period of test records are modified (see Sub-clause 6.3 hereof, Sub-clause 6.3 of Edition 2007); ——the supply scope of the complete pump is modified (see Sub-clause 7.1.1 hereof; Sub-clause 4.19 of Edition 2007); ——the storage conditions of the pump are added (see Sub-clause 7.4 hereof); ——the guarantee is added (see Clause 8). This standard was proposed by China Machinery Industry Federation. This standard is under the jurisdiction of the National Technical Committee on Pumps of Standardization Administration of China (SAC/TC 211). The previous editions of this standard are as follows: ——JB/T 8644-1997 and JB/T 8644-2007. Single screw pumps 1 Scope This standard specifies the model and basic parameters, technical requirements, test methods, inspection rules, complete set, making, packaging, storage and guarantee of single screw pumps. This standard is applicable to single screw pumps (hereinafter referred to as the pumps) that are used for transporting water-like and pasty even high-viscosity medium. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 9112 Types and parameters for steel pipe flanges GB/T 9115 Steel pipe welding neck flanges GB/T 9119 Slip-on-welding plate steel pipe flanges GB/T 13306 Plates GB/T 13384 General specifications for packing of mechanical and electrical product GB/T 17241.6 Integral cast iron pipe flanges GB/T 29529 Methods of measuring and evaluating noise of pumps GB/T 29531 Methods of measuring and evaluating vibration of pumps JB/T 4297 Painting specification for pumps JB/T 6880.1 Grey iron castings for pumps JB/T 6880.2 Steel castings for pumps JB/T 8091 Testing methods for screw pumps JB/T 8687 Sampling inspection for pump products 3 Model and basic parameters 3.1 Model and expression methods Five groups of Chinese phonetic alphabet and numbers can be used to indicate the model of the pump, consisting of pump type, structure, installation type, purpose, flow rate and pressure parameters. 3.2 Examples of labeling Example 1: The horizontal single screw pump with the nominal diameter of the rotor of 15 mm and with a standard lead series for transporting food and medical media is labeled as follows: GS15-1 Example 2: The vertical single screw pump for marine use with nominal diameter of the rotor of 35 mm and with two standard lead series is labeled as follows: GUC35-2. Example 3: At 200 r/min, the theoretical flow rate Q = 2 m3/h. The single screw pump, with the maximum pressure of P=0.6 MPa and with a long lead, for transporting corrosion resistant medium is labeled as follows: GUF002-06. 3.3 Rotating direction Seen from the driving end, the pump rotates in counterclockwise direction. In case of any special requirements from the user, the pump shall be manufactured according to the contract confirmed by both the supplier and the purchaser. 3.4 Basic parameters Pumps are divided into five grades according to flow rate, as shown in Table 1. Table 1 Classification of pumps Grade Theoretical flow rate per 100 r Volumetric efficiency ηv Efficiency of pump η L No load Rated pressure Mini-sized ≤10 0.96 0.65 0.55 Small-sized >10~50 0.96 0.70 0.64 Middle-sized >50~200 0.96 0.75 0.68 Large-sized >200~800 0.97 0.81 0.73 Extra-large-sized >800 0.97 0.86 0.77 In the table, the test medium of efficiency index is clean water at 20℃, and the pump speed is the data under the relative sliding speed of stator and rotor at vgm=4 m/s. When the pump is integrated with the driving mechanism and cannot be disassembled, the efficiency of the driving mechanism shall be taken into account in measuring the total efficiency of the unit. 3.5 Design maximum speed The design maximum speed of the pump is determined according to the relative sliding speed of the stator and rotor vgm=4 m/s: the design maximum speed of different types of pumps varies. The above speed is only used for assessing various indexes of the pump during type tests with clear water, and shall not be used as the actual speed. See Annex A for the speed range of the pump when transporting different medium. 4 Technical requirements 4.1 General requirements The pump shall meet the requirements of this standard, and shall be manufactured according to the product drawings and technical documents approved through specified procedures. While considering the requirements of this standard, special requirements from the users (if any) shall be indicated in the order and the pump shall be manufactured according to the contract confirmed by both the supplier and the purchaser. 4.2 Efficiency of pump The volumetric efficiency of the pump shall meet those specified in Table 1 of this standard. Under the condition that the power tolerance of pump meets the requirements of JB/T 8091, the efficiency of pump shall meet those specified in Table 1 of this standard, and the lower tolerance limit is 95 % of the specified value. Under the condition that both shaft power and efficiency reach the standard, the lower deviation of pump flow rate shall meet the requirements of JB/T 8091, and the upper deviation shall not be controlled. 4.3 Conditions for medium transported The pump shall be capable of continuous normal operation under the following conditions for medium transported: ——the temperature is less than or equal to 80℃, and the special stator can reach -20℃~150℃ (otherwise agreed by both the supplier and the purchaser): ——the pump is allowed to transport medium containing solid particles and fibers. The maximum volume fraction of solid matters shall not exceed 40 %, the maximum particle diameter shall not exceed the eccentricity of the rotor, and the maximum fiber length shall not exceed 40 % of rotor pitch. 4.4 Marine conditions The pump shall be capable of working reliably under the following marine conditions: ——periodic rolling of 22.5°; ——pitch of 7.5°; ——continuous heeling of 15°; ——continuous trimming of 15°. 4.5 Vibration level evaluation of pumps The vibration value of the pump is determined by the following conditions: ——the pump are divided into four categories according to the theoretical flow rate of pump: Category I: theoretical flow rate q ≤ 10 L at 100 r (mini-sized pump): Category II: theoretical flow rate 10 L< q ≤ 50 L at 100 r (small-sized pump); Category III: theoretical flow rate 50 L < q ≤ 200 L at 100 r (middle-sized pump); Category IV: theoretical flow rate q > 200 L at 100 r (large-sized or extra-large-sized pump). ——the vibration level of the pump is divided into four levels: A, B, C and D. Among them, A, B and C indicate acceptance and D indicates rejection. ——the evaluation methods for vibration of pump shall meet those specified in Table 2. Foreword i 1 Scope 2 Normative references 4 Technical requirements 5 Test methods 6 Inspection rules 7 Complete set, marking, packaging and storage 8 Guarantee Annex A (Informative) Speed range of pumps transporting different medium Annex B (Informative) Data sheet ICS 23.080 J 71 备案号:58482—2017 中华人民共和国机械行业标准 JB/T 8644—-2017 代替JB/T 8644—2007 单螺杆泵 Single screw pumps 2017-04-12发布 2018-01-01实施 中华人民共和国工业和信息化部 发布 前言 本标准按照GB/T 1.1—2009给出的规则起草。 本标准代替JB/T 8644—2007《单螺杆泵》,与JB/T 8644—2007相比主要技术变化如下: ——修改了标准的适用范围(见第1章,2007年版的第1章); ——修改了泵的型号及表示方法(见3.1,2007年版的3.1); ——修改了定、转子相对滑动速度,改为滑移速度(见3.4,2007年版的3.6); ——修改了大型泵、特大型泵的容积效率与泵效率(见表1,2007年版的表1); ——修改了流量的允差,明确了在轴功率和效率都达标的条件下,流量不进行上偏差控制(见4.2,2007年版的5.1); ——修改了泵的噪声值要求(见4.6,2007年版的4.6); ——修改了定子、转子推荐使用材料(见表3,2007年版的表3); ——修改了轴承的温升,明确了测量点(见4.8.2,2007年版的4.14) ——增加了泵本体不设置安全阀的要求(见4.10); ——修改了泵进出口法兰X、Y、Z三个方向的载荷值(见表4,2007年版的表4); ——增加了泵装配前、装配后的规定(见4.12.2、4.12.5); ——增加了联轴器安装和设备起吊构件的规定(见4.12.6、4.12.7); ——修改了泵的涂漆要求(见4.13,2007年版的4.16); ——增加了严禁泵在进料不足的情况下长期运行的规定(见4.14.2); ——修改了泵的整机寿命,由1年提高到2年,明确了易损件(见4.14.4,2007年版的4.20); ——增加了泵不要求做NPSHR试验的规定(见5.2); ——增加了泵试验在制造厂无法进行时,制造厂可与用户协商在用户现场进行试验的规定(见5.6); ——修改了材质检验要求(见6.1,2007年版的6.1); ——修改了出厂试验要求和试验记录的保存年限(见6.3,2007年版的6.3); ——修改了泵的整机成套供货范围(见7.1.1,2007年版的4.19); ——增加了泵的贮存条件(见7.4); ——增加了保证事项(见第8章)。 本标准由中国机械工业联合会提出。 本标准由全国泵标准化技术委员会(SAC/TC 211)归口。 本标准所代替标准的历次版本发布情况为: ——JB/T 8644—1997、JB/T 8644—2007。 单螺杆泵 1 范围 本标准规定了单螺杆泵的型号与基本参数、技术要求、试验方法、检验规则、成套、标志、包装、贮存和保证事项。 本标准适用于输送水状、糊状直至高黏度介质的单螺杆泵(以下简称泵)。 2规范性引用文件 下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本文件。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。 GB/T 9112钢制管法兰 类型与参数 GB/T 9115对焊钢制管法兰 GB/T 9119板式平焊钢制管法兰 GB/T 13306标牌 GB/T 13384机电产品包装通用技术条件 GB/T 17241.6整体铸铁法兰 GB/T 29529泵的噪声测量与评价方法 GB/T 29531 泵的振动测量与评价方法 JB/T 4297泵产品涂漆技术条件 JB/T 6880.1泵用灰铸铁件 JB/T 6880.2泵用铸钢件 JB/T 8091螺杆泵试验方法 JB/T 8687泵类产品 抽样检验 3型号与基本参数 3.1型号及表示方法 可采用五组汉语拼音字母和数字表示泵的型号,含义包括泵类别、结构、安装型式、用途、流量和压力参数。 压力参数:以泵的导程级数或压力值×10 表示(整数前两位圆整值) 流量参数:以泵的转子公称直径或规定转速时 流量表示(整数前三位圆整值) 用途 C:船用 N:高黏度介质(可设置喂料机构) F:耐腐蚀介质 S:医药和食品介质 K:矿用 其他字母:特殊介质 无字母:清水及无腐蚀、磨损介质 安装型式 无字母:标准卧式(轴承架结构) Z:直连式(无轴承架。由电动机或减速器承受推力和转矩) U:立式 结构 无字母:单螺旋 T:双头螺旋 导程 无字母:标准导程,T(导程)/D(直径)≈5:1 L:长导程,T/D≈10:1 D:短导程,T/D≈2.5:1 单螺杆泵 3.2标记示例 示例1: 转子名义直径为15 mm,一个标准导程级数、卧式、输送食品和医药介质用单螺杆泵,标记为: GS15-1 示例2: 转子名义直径为35mm,两个标准导程级数,立式船用单螺杆泵,标记为: GUC35-2。 示例3: 200 r/min时,理论流量Q=2 m3/h。最高压力P=0.6 MPa,长导程、耐腐蚀介质用单螺杆泵,标记为: GUF002-06。 3.3旋转方向 从驱动端看,泵为逆时针方向旋转。用户有特殊要求时,按供需双方确认的合同制造。 3.4基本参数 泵按流量大小分为五级,见表1。 表1泵的分级表 级别 每100r时理论流量 容积效率ηv 泵效率η L 空载时 额定压力时 微型 ≤10 0.96 0.65 0.55 小型 >10~50 0.96 0.70 0.64 中型 >50~200 0.96 0.75 0.68 大型 >200~800 0.97 0.81 0.73 特大型 >800 0.97 0.86 0.77 表中效率指标试验介质为20℃清水,泵的转速为定子、转子相对滑移速度vgm=4m/s时的数据。当泵与驱动机构为一体,不可分解时,测机组总效率应考虑驱动机构效率。 3.5设计最高转速 泵的设计最高转速按定子、转子相对滑移速度vgm=4 m/s确定:不同型号泵的设计最高转速是不同的,此转速仅用于在用清水进行型式试验时考核泵的各项指标,不应作为实际使用转速,泵输送不同介质时的转速范围参见附录A。 4技术要求 4.1一般要求 泵应符合本标准的要求,并按经规定程序批准的产品图样及技术文件制造。如用户有特殊要求,在考虑本标准规定的同时,应在订单中注明,按供需双方确认的合同制造。 4.2泵效率 泵的容积效率应符合本标准表l的规定。在泵功率允差符合JB/T 8091规定的条件下,泵效率应符合本标准表1的规定,其允差下限为规定值的95%。在轴功率和效率都达标的条件下,泵流量的下偏差应符合JB/T 8091规定,上偏差不控制。 4.3输送介质条件 泵在下列输送介质条件下应能连续正常运行: ——温度小于或等于80℃,特殊定子可达到-20℃~150℃(由供需双方另订协议): ——泵允许输送含固体颗粒和纤维的介质,固体物最大体积分数不超过40%,最大粒径不超过转子的偏心距,最大纤维长度不超过40%的转子螺距。 4.4船用条件 泵在下述船用条件下应能可靠地工作: ——周期型横摇22.5°; ——纵摇7.5°; ——持续横倾15°; ——持续纵倾5°。 4.5泵的振动级别评定 泵的振动值由下列条件确定: ——根据泵的理论流量大小,将泵分成四类: 第一类:100 r时,理论流量q≤10 L(微型泵): 第二类:100 r时,理论流量10 L 200 L(大型或特大型泵)。 |
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JB/T 8644-2017, JB 8644-2017, JBT 8644-2017, JB/T8644-2017, JB/T 8644, JB/T8644, JB8644-2017, JB 8644, JB8644, JBT8644-2017, JBT 8644, JBT8644 |