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Oil drainage method of split type fuel pump

A fuel pump, split technology, applied in the fuel valve of turbine/propulsion device, turbine/propulsion fuel delivery system, engine components, etc., can solve the problem of difficult fuel collection, increased maintenance workload and difficulty, easily polluted parts and environment and other problems, to achieve the effect of saving cleaning, easy modification and promotion, and good oil drainage effect

Active Publication Date: 2013-09-11
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the structure of the fuel pump, a certain amount of fuel will accumulate in the pump core and the pump body. During the process of disassembling the pump core, when the pump core is pulled out, this part of the residual fuel will flow out
The outflowing fuel oil is difficult to collect and easily pollutes the components and environment around the pump
Therefore, after the pump core is taken out, the contaminated parts need to be cleaned, which increases the workload and difficulty of maintenance

Method used

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  • Oil drainage method of split type fuel pump
  • Oil drainage method of split type fuel pump
  • Oil drainage method of split type fuel pump

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing the present invention is described in further detail, please refer to Figure 1 to Figure 4 .

[0023] A split type fuel pump oil discharge method, when the split type fuel pump is installed (such as figure 1 As shown), the self-sealing valve 6 on the pump body 1 is in the open state, the ventilation plug cap 8 blocks the ventilation joint 13, the oil discharge plug cap 9 blocks the oil discharge joint 11, and the pump outlet one-way valve 1e in the pump outlet 1b It is in a closed state under the action of a spring, and the exhaust one-way valve 1d in the exhaust port 1a is in a closed state under the action of a spring.

[0024] When the split fuel pump is in the oil discharge state (such as figure 2 As shown), pull out the pump core 2 to the required position, at this time the self-sealing valve 6 on the pump body 1 is in a closed state, and the sealing structure 7 on the pump core 2 is in a sealed state in the pump b...

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Abstract

The invention belongs to the technical field of aviation fuel systems, and in particular relates to an oil drainage method of a split type fuel pump. Residual oil in a pump core is pumped through an oil drainage nozzle which is arranged on the pump core by using a needle cylinder, so that surrounding parts and environment cannot be polluted by fuel during replacement and extraction of the pump core, operations such as cleanup, cleaning and drying required by the parts and the environment which are polluted by the fuel are eliminated, the maintenance workload is reduced, and the maintenance time is shortened. According to the oil drainage method of the split fuel pump, the operation is easy, the use is convenient and the oil drainage effect is good. Equipment adopted in the oil drainage method of the split fuel pump is small in size, light in weight, small in number, easy to configure and carry. According to the oil drainage method of the split fuel pump, power and energy are not needed. The oil drainage method of the split fuel pump is suitable for field application and great in application value. Without the great change of the existing split fuel pump structure, the existing split fuel pump can be assembled, popularized and used.

Description

technical field [0001] The invention belongs to the technical field of aviation fuel systems, and in particular relates to a method for draining oil from a split fuel pump. Background technique [0002] The split fuel pump is installed on the front beam or rear beam of the aircraft wing. Its pump core and pump body are detachable, and the pump body is located inside the wing fuel tank. This design is for convenient maintenance of the fuel pump. Of course, when the oil pump needs to be repaired, the faulty pump core in the pump body can be directly pulled out, and then replaced with a new pump core, and the fuel in the fuel tank does not need to be discharged during the whole process. However, limited by the structure of the fuel pump, a certain amount of fuel will accumulate in the pump core and the pump body. During the process of disassembling the pump core, when the pump core is pulled out, this part of the residual fuel will flow out. The escaping fuel is difficult to c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02C7/232
Inventor 林厚焰戴晨峰马少璞何明
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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