Recently, the independently developed Welkin liquid oxygen/kerosene engine large range variable condition turbine pump components’ delivery has been completed, and hydraulic tests will be carried out in the near future.

Welkin liquid oxygen/kerosene engine is the main engine of Pallas-1, which can be reused 50 times.With its excellent design, it has a variable thrust ratio of 4:1 and push weight ratio over 120. As the heart of engine, turbine pump is the only component with high spinning speed. It consumes high-pressure gas to drive the turbine,makes the pump to rotate at high speed and push the pressurized oxidant and fuel from the tank to the thrust chamber.

The independently R&D Welkin liquid oxygen/kerosene engine large range variable condition turbine pump is the first domestic double suction coaxial split turbine pump, the structure forms of coaxial split (rigid shaft), liquid oxygen pump double suction, turbine cantilever, membrane box seal and self-developed new floating ring are adopted within. The innovative design significantly improves the rotating speed, reduces the sealing pressure, improves the reliability and further simplifies the structure of turbine pump, reducing the total weight by 30% - 40% compared with the traditional design.

In earlier stage, the turbine pump components have successively completed all the tests such as dynamic sealing, air tightness and pressure, dynamic balance, etc. And all the tests are successful. Each component meets the design and acceptance delivery requirements, and the pump hydraulic performance test will be carried out soon. With the follow-up joint test of turbine pump and gas generator and the test of the whole system afterwards, the development process of liquid rocket will be accelerated in this year.