Service Bulletin-04 真空电容的外形尺寸

Transcription

1 Plasma Control Technologies Service Bulletin-04 真空电容的外形尺寸 在安装或者拆装真空电容时, 由于真空电容的电级片很容易移位, 所以要特别注意避免对电容的损伤, 这对于过去的玻璃电容来说非常明显, 但对于如今的陶瓷电容则不那么明显, 因为它们能够承载更高的机械的 电性能的负载及热负载 尽管从外表看来电容非常结实, 但是应当注意, 由于采用焊接工艺来封装铜和陶瓷, 铜退火处理后处于很软的状态, 非常易于产生机械变形 基于这个原因, 任何粗暴的操作如对法兰的加工都必须避免, 如加工法兰 应使用已有的螺孔进行安装固定, 详见产品应用信息 SB-25 安装对于所有的电容, 我们建议在电容一端进行非刚性安装, 以防止过大的热机械力和应力作用在电容上 大多数 COMET 电容两端都装有铜安装法兰, 在每个规格说明书中都有介绍 我们使用这些安装法兰作为机械的和电性能的连接, 大部分标准的固定法兰包含 6 个公制螺纹孔间隔 6 个英制螺纹孔 外形尺寸 主要的外形尺寸如图 1 所示 : K 总长度 A 陶瓷直径外形尺寸在产品目录上也有说明 其它用于安装的重要尺寸 : H 安装或半成品的长度 I 驱动系统的长度 B 安装法兰的直径 E 调节螺杆的直径 其它一些尺寸对于安装不太重要的参数, 列出来仅供参考, 例如直径 C 在外端有一个焊接缝, 它并不是针对安装要求的 图 1 在规格说明书上, 给出了图 2 所示的俯视图和图 3 所示的仰视图, 它包含了详细的安装法兰的尺寸, 如螺栓圆周 D 和安装螺孔 P1 和 P2, 如果图 M 显示有角度, 其线性度是在 2 以内 请注意 : 可调及固定法兰的安装螺孔的线性度在 2 以内 Original English version:

2 真空电容的外形尺寸 / Page 2 of 4 图 2 俯视图 图 3 仰视图 总体公差不同尺寸的不同公差取决于不同的制造工序, 机械部件如调节螺杆, 相对于焊接件来说, 如轴环和陶瓷, 其公差非常精确 安装环直径 B 和螺栓圆周 D - 公差取决于尺寸 : ( 机械部件的直径和长度 ) ( 如果规格说明书上没有特殊说明 ) 直径 [mm] 公差 [mm] 0.5 ~6 6 ~ ~ ~ 400 ±0.1 ±0.2 ±0.3 ±0.5 轴环直径 C, 焊接 - 公差取决于尺寸 : 直径 0.5 ~ 3 3 ~ 6 6 ~ ~ ~ 400 [mm] 公差 [mm] ±0.2 ±0.3 ±0.5 ±0.8 ±1.2 安装 ( 半成品 ) 长度 H - 公差取决于尺寸 : 长度 [mm] 0.5 ~30 30 ~ ~ 200 > 200 公差 [mm] ±0.5 ±1 ±1.5 ±2 总长度 K, 其公差由 H,I( 如果可能还有 J,L ) 的累计公差决定 对于指定的电容, 数据表里给出了官方的基本尺寸, 如未另行规定, 尺寸误差遵循德标 ISO MK 标准 Original English version:

3 真空电容的外形尺寸 / Page 3 of 4 驱动系统的安装可调端的调节螺杆会通过一个耦合杆连接上马达, 因此必须轴向安装 严禁安装时产生侧向负载, 以防止降低电容驱动系统的使用寿命 下图显示了一个耦合接头 : 调节螺杆的同轴性可调端法兰的调节螺杆的同轴性取决于电容的尺寸 调节螺杆的同轴性 公差取决于尺寸 I 长度 0.5 ~ ~ ~ 200 > 200 公差 ±0.5 ±1 ±1.5 ±2 Original English version:

4 真空电容的外形尺寸 / Page 4 of 4 安装对所有的电容, 推荐在安装时有一侧是非刚性的, 以避免过多的热机械力和其他外力作用在电容上 大部分的 COMET 电容均配有铜质的安装法兰, 在数据手册里有描述. 我们推荐使用法兰盘用于机械和电气的连接 一些标准的法兰盘配有 6 个公制螺纹孔和 6 个英制螺纹孔 Max. admissible Tightening Torque [Nm] M3 M4 M5 M6 ¼ -20UNC ¼ -28UNF 8-32UNC ⅜ -32UNEF ⅜ -16UNC ½ -28 M12x0.75 Basic-Con 1 Dual-Con 1 2 HAMi-Con 10 Hexa-Con 2 Hiper-Con 2 2 LAMi-Cap 2 2 LAMi-Con 2 2 Li-Con 2 Lumi-Con 1 MAMi-Cap 2 2 MAMi-Con 2 2 Maxi-Con 2 Midi-Con 2 2 Mini-Cap 2 Mini-Con 2 Mono-Con 2 NAMi-Cap 2 2 NAMi-Con 2 2 Power-Con 2 SAMi-Cap 2 2 SAMi-Con 2 2 Smart-Con 2 2 Supra-Con 2 Trimmer-Cap 2 Uni-Con Uni-Select X-Cap 2 表 1: COMET 电容可承受扭力表 Original English version:

5 Plasma Control Technologies Service Bulletin-04 Mechanical Dimensions of Vacuum Capacitors When installing or removing vacuum capacitors, extreme care must be taken to avoid damage to the body of the capacitor, as the electrodes are easily displaced. While this was quite obvious for the old glass capacitors, it is less so for the modern ceramic types that can take higher mechanical and electrical/thermal loads. Although they look very rugged from the outside it must be remembered that, due to the brazing process used to join ceramic and copper, the copper is in a soft, annealed condition and is therefore highly susceptible to mechanical deformation. For this reason, any rough handling, like machining of the flanges, must be avoided. Use existing threads and holes for fixation. See also Service Bulletin SB-25.

6 Mechanical Dimensions of Vacuum Capacitors / Page 2 of 5 Mechanical Dimensions The main dimensions are shown on Fig. 1: K Overall length A Ceramic diameter which are also listed in the product catalogue Other important dimensions for installing: H Mounting or Block length I Length of drive system B Mounting flange diameter E Lead screw shaft diameter All other dimensions are less important for installation and are shown for information reason only. Diameter C for example has a welding seam at the free end, which doesn t Fig. 1 allow for installation purposes. On the data sheets the top view, Fig. 2, and bottom view Fig. 3 are given for detailed mounting flange dimensions like bolt circle D and mounting threads P1 and P2. If angles are shown on the drawing M, the accuracy of the alignment is within 2 Please note: The mounting holes or threads of the variable and fixed flange are aligned within 2. Fig.2 Top view Fig. 3 Bottom view

7 Mechanical Dimensions of Vacuum Capacitors / Page 3 of 5 General Tolerances Different tolerances on the different dimensions depend on the kind of fabrication steps. Machined parts, lead screws for example, have a higher accuracy than welded and brazed parts like collars and ceramics. Mounting ring diameter B and bold circle D - tolerances depending on size: (Diameters and length of machined parts) (if not specified on data sheet) Diameter [mm] 0.5 bis 6 >6 bis 30 >30 bis 120 >120 bis 400 Tolerance [mm] ±0.1 ±0.2 ±0.3 ±0.5 Collar diameter C, brazed or welded - tolerance depending on size: Diameter [mm] 0.5 bis 3 >3 bis 6 >6 bis 30 >30 bis 120 >120 bis 400 Tolerance [mm] ±0.2 ±0.3 ±0.5 ±0.8 ±1.2 Mounting (block) length H - tolerance depending on size: Length [mm] 0.5 bis 30 > 30 bis 100 > 100 bis 200 > 200 Tolerance [mm] ±0.5 ±1 ±1.5 ±2 Overall length K (in brackets), tolerance results from accumulated tolerances of H, I (and J and L if applicable) The datasheet for the specific capacitor designation is the official specification for the dimensions. When not otherwise specified, the general tolerance DIN ISO 2768-mK is applicable.

8 Mechanical Dimensions of Vacuum Capacitors / Page 4 of 5 Mounting of drive system The lead screw on the variable side has to be mounted axial over a flexible coupler to the motor. No side load should be applied to prevent a reduced life time of the drive system of the capacitor. The figures below show examples of coupler adaptors: Concentricity of the lead screw shaft The concentricity of the lead screw shaft referring to the variable flange depends on the size of the capacitor. Concentricity of lead screw - tolerances depending on dimension of I length 0.5 bis 30 > 30 bis 100 > 100 bis 200 > 200 tolerance ±0.5 ±1 ±1.5 ±2

9 M3 M4 M5 M6 ¼ -20UNC ¼ -28UNF 8-32UNC ⅜ -32UNEF ⅜ -16UNC ½ -28 M12x0.75 Mechanical Dimensions of Vacuum Capacitors / Page 5 of 5 Installation For all capacitors it is recommended that one side be mounted non-rigid to prevent excessive thermo-mechanical and external forces from acting on the capacitor. Most COMET capacitors are equipped with copper mounting flanges at both ends. This is shown on the individual product data sheets. We suggest using these mounting flanges for all mechanical and electrical connections. Many standard solid flanges contain 6 metric thread holes alternating with 6 inch-sized thread holes. Max. admissible Tightening Torque [Nm] Basic-Con 1 Dual-Con 1 2 HAMi-Con 10 Hexa-Con 2 Hiper-Con 2 2 LAMi-Cap 2 2 LAMi-Con 2 2 Li-Con 2 Lumi-Con 1 MAMi-Cap 2 2 MAMi-Con 2 2 Maxi-Con 2 Midi-Con 2 2 Mini-Cap 2 Mini-Con 2 Mono-Con 2 NAMi-Cap 2 2 NAMi-Con 2 2 Power-Con 2 SAMi-Cap 2 2 SAMi-Con 2 2 Smart-Con 2 2 Supra-Con 2 Trimmer-Cap 2 Uni-Con Uni-Select X-Cap 2 Tab. 1: admissible torques for COMET Vacuum Capacitors