CN202690862U - Undercarriage-buffer valve device - Google Patents

Abstract

The utility model belongs to the design field of airplane undercarriage buffers and provides an undercarriage-buffer valve device, which comprises a damping plate, a valve and a nut; the whole body of the valve is provided with eight oil through holes, and the valve is floated in the damping plate; the nut is connected onto the damping plate through threads to limit the valve within the damping plate; and the valve and the damping plate are in clearance fit. Through the utility model, a spring and the oil through holes on the whole body of the damping plate are cancelled, the problem that the valve is controlled by the spring to influence the buffering performance of the buffer to a certain degree is solved, the structure is simplified, the mass is lightened, and the reliability of an airplane buffering system is improved while the reliability per se is improved.

Description

Landing gear bumper valve assembly

technical field

The utility model belongs to the design field of an aircraft landing gear buffer, and relates to a landing gear buffer valve device.

Background technique

The existing spring-controlled throttle valve device has been applied to the buffer of the aircraft, and its structure is shown in Figure 1. When the buffer is compressed, the oil surges up through the positive damping hole 5 at high speed, overcoming the spring Open the valve 2 with force, and pass through the reverse damping holes 6, 6 oil holes 8 on the valve 2 and 6 oil holes 7 on the damping plate 1; when the buffer is extended, the valve 2 will Under the joint action of the spring force and the damping plate 1, the oil hole 8 on the valve 2 is blocked, and the oil passes through the reverse damping hole 6 on the valve 2 and the forward damping hole 5 on the damping plate 1. During the whole process, the shock absorber realizes the function of converting impact kinetic energy into heat energy through the oil damping force generated by the oil flowing through the device. However, during the working process of this kind of damping device, the valve is acted by the spring, and its motion trajectory is difficult to control, and the cushioning performance of the buffer will be affected to a certain extent.

Contents of the invention

The technical problem to be solved by the utility model: the purpose of the utility model is to provide a landing gear buffer valve device with good damping effect, simple structure, high reliability and light weight.

The technical scheme of the utility model: a landing gear buffer valve device, comprising: a damping plate, a valve, and a nut; there are 8 oil holes around the valve, floating in the damping plate; the nut is threaded on the damping plate, and the The valve is defined in the damping plate; the valve is in clearance fit with the damping plate.

Beneficial effects of the utility model: the utility model provides a new valve form, and cancels the oil hole around the spring and the damping plate, which solves the problem that the valve is controlled by the spring and affects the cushioning performance of the buffer to a certain extent. The structure is simplified and the quality is reduced. It can provide efficient damping for the landing gear buffer during its working process. It is a purely mechanical device, which improves the reliability of the aircraft buffer system while improving its own reliability.

Description of drawings

Fig. 1 is a sectional structural view of a conventional spring-controlled throttle valve device.

Fig. 2 is a sectional structure diagram of the utility model.

Fig. 3 is a schematic diagram of the internal structure of the utility model applied to a certain buffer.

Detailed ways

Refer to Fig. 2 and Fig. 3 for the technical scheme of the utility model. The damper valve device includes: a damping plate 1, a valve 2, and a nut 3. Valve 2 has 8 oil holes all over its body, floating in the damping plate. The nut 3 is screwed on the damping plate 1, and the valve 2 is limited in the damping plate 1; the valve 2 and the damping plate 1 have a clearance fit, which can not only ensure that the valve 2 can move freely along the inner wall of the damping plate 1, but also ensure that the oil shock It will not fall over during the process.

The working process of the utility model is similar to that of the prior art (see Figure 1): the working medium of the aircraft buffer is industrial nitrogen and aviation hydraulic oil, and its working principle is to utilize the compressibility of gas and the incompressibility of liquid and the The frictional heat loss characteristics complete the buffering function. The function of the valve device is to damp the oil passing through at high speed, and convert the kinetic energy of the oil into heat energy. The valve device is installed on the inner cylinder through a nut. When the inner cylinder of the buffer is compressed, the inner cavity volume of the inner cylinder becomes smaller, forcing the hydraulic oil to flow up through the forward damping hole 4 at high speed, and open the valve 2. The reverse damping hole 5 and the oil hole 6 flow into the inner cylinder. This process produces frictional damping, which converts kinetic energy into heat energy, and then dissipates it through the inner and outer cylinders. At the same time, the gas in the buffer is compressed; the reverse stroke (inner cylinder extension out) the compressed gas expands, forcing the inner cylinder to protrude, and the nitrogen pressure pushes the hydraulic oil through the reverse damping hole 5 and the forward damping hole to flow into the outer cavity. At this time, the valve 2 is pressed against the damping plate under the action of the oil pressure 1. The oil hole 6 on the valve 2 is blocked, and the oil can only pass through the reverse damping hole 5 on the valve 2, so that the inner cylinder of the buffer pillar protrudes slowly. During this process, the valve again produces frictional damping, which converts kinetic energy into thermal energy, and then dissipates it through the inner and outer cylinders. During the up-and-down movement of the inner cylinder, the oil in the buffer flows through the positive and negative damping holes at high speed, resulting in stagnation, which converts the landing kinetic energy of the aircraft into heat energy and dissipates it.

Claims (1)

1. a undercarriage buffer valve arrangement is characterized in that, comprising: damping plate, valve, nut; Valve has 8 oil throughs all over the body, floats in the damping plate; Nut is threaded connection on damping plate, and valve is limited in the damping plate; Valve and damping plate Spielpassung.

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