摘要：【中文】本发明公开了一种微细管束式预冷器膜片振动测量系统及方法，属于预冷器技术领域，该系统包括：支座，激振器，激光测振仪，高速摄像机及平衡质量块；所述预冷器膜片放置在支座上表面；支座的下表面固定在激振器上；平衡质量块安装在支座的下表面，所述激光测振仪安装在预冷器膜片的上方，激光测振仪射出的激光光斑垂直打在设定区域的微细管上表面；所述高速摄像机安装在预冷器膜片的外侧；本发明通过采用高速摄像机与激光测振两种方式对预冷器膜片同时测量并相互校对，能够提高对微细管振动的测量精度。 【EN】The invention discloses a micro-fine tube bundle type precooler membrane vibration measurement system and a method, belonging to the technical field of precoolers, wherein the system comprises: the device comprises a support, a vibration exciter, a laser vibration meter, a high-speed camera and a balance mass block; the precooler membrane is placed on the upper surface of the support; the lower surface of the support is fixed on the vibration exciter; the balance mass block is arranged on the lower surface of the support, the laser vibration meter is arranged above the membrane of the precooler, and laser spots emitted by the laser vibration meter vertically hit the upper surface of the microtube in a set area; the high-speed camera is arranged on the outer side of the membrane of the precooler; the invention adopts two modes of high-speed camera and laser vibration measurement to simultaneously measure and mutually correct the precooler diaphragms, and can improve the measurement precision of the vibration of the microtubes.

摘要：【中文】本发明公开了一种微细管束式预冷器膜片，属于微细管束式预冷器膜片技术领域，包括：微细管束、弹性密封件、集气管及球状接头；所述集气管为径向截面为D型的管状结构，在集气管的D型外表面的平面上；所述微细管束的两末端分别插入到两个集气管上的焊接孔中并固连；所述球状接头的外表面为球形，两个球状接头分别套装在集气管两端的外圆周面上，并通过焊接固定；所述弹性密封件为环形结构，其内表面为与球状接头配合的球面，外环面为圆柱面，弹性密封件能够沿其径向弹性压缩；每个集气管的两个球状接头上各套装一个弹性密封件，弹性密封件和球状接头球面配合；本发明能够优化现有预冷器膜片结构，提高其抗疲劳性能，延长其工作寿命。 【EN】The invention discloses a micro-fine tube bundle type precooler membrane, which belongs to the technical field of micro-fine tube bundle type precooler membranes and comprises the following components: the device comprises a micro tube bundle, an elastic sealing element, a gas collecting tube and a spherical joint; the gas collecting pipe is of a tubular structure with a D-shaped radial section and is arranged on the plane of the D-shaped outer surface of the gas collecting pipe; two ends of the micro tube bundle are respectively inserted into the welding holes on the two gas collecting tubes and are fixedly connected; the outer surfaces of the spherical joints are spherical, and the two spherical joints are respectively sleeved on the outer circumferential surfaces at the two ends of the gas collecting pipe and are fixed by welding; the elastic sealing element is of an annular structure, the inner surface of the elastic sealing element is a spherical surface matched with the spherical joint, the outer annular surface of the elastic sealing element is a cylindrical surface, and the elastic sealing element can be elastically compressed along the radial direction of the elastic sealing element; the two spherical joints of each gas collecting pipe are respectively sleeved with an elastic sealing element, and the elastic sealing elements are matched with the spherical surfaces of the spherical joints; the invention can optimize the diaphragm structure of the existing precooler, improve the fatigue resistance and prolong the service life of the existing precooler.

摘要：【中文】本发明公开了一种采用梯度换热材料的空气预冷器，由两组以上螺旋换热单元同轴层叠套装组成；每个螺旋换热单元均包括微细管束及安装在微细管束两端的进气集气管和出气集气管；所述微细管束由两个以上微细管并列排布组成；每个微细管均由三个以上管段依次焊接形成，与进气集气管相连的一个管段为低温管段，与出气集气管相连的一个管段为高温管段，低温管段与高温管段之间的一个以上管段为中温管段；高温管段采用高温合金作为换热管材，中温管段采用不锈钢作为换热管材，低温管段采用铝或铜作为换热管材；本发明能够提高空气预冷器的换热性能、减轻空气预冷器自重、优化空气预冷器制造工艺以及降低空气预冷器制造成本，提高了发动机的性能。 【EN】The invention discloses an air precooler adopting a gradient heat exchange material, which is formed by coaxially laminating and sleeving more than two groups of spiral heat exchange units; each spiral heat exchange unit comprises a micro tube bundle, and an air inlet gas collecting pipe and an air outlet gas collecting pipe which are arranged at two ends of the micro tube bundle; the micro-tube bundle is formed by arranging more than two micro-tubes in parallel; each microtube is formed by sequentially welding more than three tube sections, one tube section connected with the gas inlet collecting tube is a low-temperature tube section, one tube section connected with the gas outlet collecting tube is a high-temperature tube section, and more than one tube section between the low-temperature tube section and the high-temperature tube section is a medium-temperature tube section; the high-temperature pipe section adopts high-temperature alloy as a heat exchange pipe, the medium-temperature pipe section adopts stainless steel as a heat exchange pipe, and the low-temperature pipe section adopts aluminum or copper as a heat exchange pipe; the invention can improve the heat exchange performance of the air precooler, reduce the dead weight of the air precooler, optimize the manufacturing process of the air precooler, reduce the manufacturing cost of the air precooler and improve the performance of an engine.