Engine post-thrust measuring device

Abstract

The invention discloses an engine post-thrust measuring device, comprising a hollow experiment capsule in which an engine is arranged, wherein a spray pipe is arranged at the tail end of the engine while a T-shaped thrust mandrel is arranged at the front end of the same; a thrust measuring device for measuring the post-thrust of the engine is arranged close to the thrust mandrel; a compensation device for compensating friction force for the engine is arranged at the tail end of the engine; a capsule door capable of being opened is arranged on one side, close to the spray pipe, of the experiment capsule; a first sliding block guide rail mechanism is fixedly connected with the bottom of the engine, limiting device for limiting the horizontal movement of the engine is arranged at each of two ends of the first sliding block guide rail mechanism; the bottom of the first sliding block guide rail mechanism is fixed in the experiment capsule by a second sliding block guide rail mechanism; a vacuum capsule is also connected with the experiment capsule by a pipe; the vacuum capsule, the thrust measuring device, the compensation device and the capsule door are all connected to a control host. The measurement of the engine post-thrust is achieved through simulating the vacuum environment by the vacuum experiment capsule, switching the work condition by a movable thrust block to protect the normal use of the first thrust sensor, and adopting the slide rail and the friction force compensation device to overcome the influence of the friction force to the post-thrust.

Description

technical field

[0001] The invention belongs to the technical field of rocket engines, and relates to an engine aftereffect thrust measuring device. Background technique

[0002] With the development of missile technology, higher requirements are put forward for the accuracy of missiles. However, since the current engine total impulse does not include the aftereffect impulse, the accuracy of the missile will be affected if the final stage engine is not separated from the head and body. . In order to improve the accuracy of the missile, it is necessary to consider the contribution of the aftereffect impulse to the total impulse of the engine. The generation of aftereffect thrust is mainly due to the energy stored in the solid rocket motor during the working stage, which causes the carbonization and ablation of the heat insulation layer of the aftereffect section to generate residual gas. When the engine works in a vacuum environment, these residual gases are still discharge...

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