燃气轮机的发展代表着国家重大装备制造业的总体水平，是国家高新技术与科技实力的重要标志之一。微型燃气轮机发电机组（简称微燃机）是一种清洁高效、低成本、高可靠的供能系统，得到了高度关注和迅速发展。相比于传统柴油发电机，微燃机可以提供快速起动、清洁、安静与高效的电力，并且体积小、重量轻而又便于移动，机动性好，除了用于军用车辆的辅机电站外，带有回热器的高效微燃机发电机组还可用于分布式发电、冷热电联供、车辆混合动力装置等领域，因此市场前景非常广阔。由航空发动机改型燃气轮机，具有投资少、周期短、见效快、效率高、经济性好、可靠性高、使用维护方便等优势，是微小型燃气轮机研制的重要技术途径。

本文在国内首次对小型航空APU改型成地面燃气轮机研制过程中的关键工程技术问题开展了研究：

在目前较为成熟的当量功率70kW左右的气压型辅助动力装置基础上，本文继承了航机的结构布局，并结合地面燃机的特点，重新设计了压气机，验证了涡轮的适应性，并对燃烧室进行了适应性试验；同时，全新设计了控制系统和燃油系统，并选配高速永磁发电机，形成了一型低成本、高可靠性、界面友好的60kW燃气轮机发电机组。

在总体性能设计中，采用了正反命题相结合的方法，以流通能力为标准进行部件参数分配。这种方法从总体设计方面入手，通过优化设计，尽可能沿用原航机零部件，从而减少了航改燃工作量。

在总体结构设计中，首次应用了叠片式弹性支承技术。该支承技术成本低、可靠性高，有效降低了临界转速，避开了共振区间。这一创新设计为燃气轮机的总体结构设计带来了更加可靠、稳定的支撑。

在压气机重新设计的过程中，创新采用了开槽外环装置来提高离心压气机的喘振裕度。采用这种装置可以减少燃气轮机的起动时间，从而提高装备的响应速度，对于提高装备的整体性能具有重要意义。

在燃油控制系统中首次采用了高速电磁阀作为燃油计量装置，并匹配设计了整个燃油系统。这种燃油系统供油稳定，控制精度高，实现了低成本与高可靠性的结合。

在机组集成中创新使用了起发一体高速永磁电机，实现了机组的高紧凑性，减少了附件数量，最终降低了成本。这一做法使得机组集成更加紧凑、高效，并且减少了附件数量和成本，从而提高了整体性能和使用寿命。

本文研制的航改型微燃机满足了非航空燃气轮机低成本、高可靠性等要求，突破了小型APU航改燃的关键技术。

The development of gas turbines represents the overall level of the country's major equipment manufacturing industry and is one of the important symbols of the country's high-tech and technological strength. Compared with the traditional Diesel generator, the micro gas turbine can provide fast start, clean, quiet and efficient power, and is small in size, light in weight, easy to move, and has good mobility. In addition to being used in the auxiliary power station of Military vehicle, the high-efficiency micro gas turbine generator set with a heat exchanger can also be used in the fields of distributed power generation, combined cooling, heating and power supply, vehicle hybrid power devices, etc., so the market prospect is very broad. Transforming from an aviation engine to a gas turbine has advantages such as low investment, short cycle time, fast efficiency, high efficiency, good economy, high reliability, and convenient use and maintenance. It is an important technical approach for the development of micro gas turbines.

This article is the first to conduct research on key engineering and technical issues in the development process of retrofitting small aviation APUs into ground gas turbines in China:

On the basis of the relatively mature pneumatic auxiliary power device with an equivalent power of about 70kW, this article inherits the structural layout of the aircraft and redesigns the compressor based on the characteristics of the ground gas turbine, verifies the adaptability of the turbine, and conducts adaptability tests on the combustion chamber; At the same time, a new control system and fuel system have been designed, and a high-speed permanent magnet generator has been selected, forming a low-cost, high reliability, and user-friendly 60kW gas turbine generator set.

In the overall performance design, a combination of positive and negative propositions was used for the overall performance design, and component parameters were allocated based on the flow capacity. This method starts from the overall design aspect, optimizes the design, and tries to use the original aircraft components as much as possible, thereby reducing the workload of aviation modification.

In the overall structural design, the laminated elastic support technology was first applied. This support technology has low cost and high reliability, effectively reducing the critical speed and avoiding the resonance range. This innovative design provides more reliable and stable support for the overall structural design of gas turbines.

In the process of redesigning the compressor, a slotted outer ring device was innovatively adopted to improve the surge margin of the centrifugal compressor. Adopting this device can reduce the starting time of the gas turbine, thereby improving the response speed of the equipment, which is of great significance for improving the overall performance of the equipment.

For the first time in the fuel control system, high-speed solenoid valves were used as fuel metering devices, and the entire fuel system was matched and designed. This fuel system has stable fuel supply and high control accuracy, achieving a combination of low cost and high reliability.

In the integration of the unit, an innovative use of a high-speed permanent magnet motor with integrated starting and starting functions has been achieved, achieving high compactness of the unit, reducing the number of accessories, and ultimately reducing costs. This approach makes the unit integration more compact and efficient, and reduces the number and cost of accessories, thereby improving overall performance and service life.

The aviation modified micro gas turbine developed in this article meets the requirements of low cost and high reliability for non aviation gas turbines, breaking through the key technology of small APU aviation modified fuel.

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