A double-end seal pressure stabilizing device for a turbo pump

Abstract

The invention relates to a double-end sealing pressure stabilizing device of a turbo pump, which includes an oil cylinder fixed on the pump body of the turbo pump, an oil inlet conduit, a balance piston, a cylinder head and a balance circuit. The balance piston divides the oil cylinder into a fluoroether oil chamber and a Propellant chamber, one end of the oil inlet conduit is fixed on one end of the oil cylinder and communicates with the fluoroether oil chamber, the other end is fixed on the turbo pump housing and connected with the closed oil chamber, and the cylinder head is fixed on the other end of the oil cylinder One end, one end of the balance circuit is fixed on the cylinder head and communicates with the propellant chamber through the cylinder head, and the other end of the balance circuit is fixed on the pump body of the turbo pump and communicates with the inlet pipeline of the oxidant pump. In order to overcome the abnormal high pressure of the fluoroether oil chamber during the operation of the double-end seal structure of the engine turbo pump, which causes the end-face seal to be damaged, the voltage stabilizing device of the present invention is small in size, light in weight, high-temperature resistant, and corrosion-resistant, which is beneficial to long-term storage and does not require secondary maintenance, and at the same time can eliminate the pressure stabilizing device of the high pressure in the oil chamber.

Description

technical field [0001] The invention relates to a pressure stabilizing device, in particular to a novel pressure stabilizing device suitable for double-end seals of engine turbo pumps, which can be used for lubricating, stabilizing, releasing and maintaining pressure of the double-end seal structures of engine turbo pumps. Background technique [0002] As the heart of the engine, the turbo pump has the characteristics of high temperature, high pressure, high speed and corrosive medium. Turbo pumps include pumps, turbines, and various sealing components. A double seal structure is adopted between the oxidizer pump and the turbine of the engine turbo pump in a finalized state. The spring type face seal 2 is the main seal, which is close to the oxidant pump, and the bellows type face seal 1 is the auxiliary seal, which is close to the turbine side. Between the seals is a closed oil chamber 12, which is filled with fluoroether oil to cool and lubricate. In recent years, double...

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Problems solved by technology

[0005] In order to overcome the abnormal high pressure of the fluoroether oil cavity in the double-end seal structure of the engine turbo pump, which leads to the damage of the end seal, solve the problem that the existing voltage stabilizing device requires secondary maintenance (replenishment gas is required, which is not conducive to long-term storage), low reliability, Due to the shortcomings of limited pressure stabilization ability, the present invention provides a new type of pressure stabilization device with double-end seals for turbo pumps. At the same time, it can eliminate the pressure stabilizing device of the high pressure in the oil chamber

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