Groove protection tool for mounting valve core of RAT (Radio Access Technology) receiving and releasing valve sealing sleeve sealing element

Abstract

The utility model belongs to the technical field of hydraulic pressure, and relates to a groove protection tool for mounting a valve core through a sealing element of an RAT (Radio Access Technology) receiving and releasing valve sealing sleeve, which comprises a sleeve, a spring, a spring seat and a guide sleeve, the spring is arranged in an inner hole of the sleeve, one end of the spring is contacted with the top of the inner hole of the sleeve, and the other end of the spring is contacted with the spring seat arranged in the inner hole of the sleeve in a sliding manner; a rectangular groove is formed in the end of the guide sleeve, a groove opening of the rectangular groove is an arc-shaped face, the rectangular groove is matched with the shaft section of the tail end of the valve element, the arc-shaped face is matched with the transition section of the tail end of the valve element, and the outer circumferential face of the guide sleeve is flush with the outer circumferential face of the valve element. And the internal Wedgpak sealing element cannot be scratched when passing through the transition section of the groove at the tail end of the valve core.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulics, in particular to a groove protection tool for a valve core during the installation of a Wedgpak sealing element of a sealing sleeve of a ram air turbine retractable valve. Background Art

[0002] The RAT retractable valve is mainly used in the aircraft ram air turbine (RAT) retractable system. It has the function of manually switching the oil circuit to realize the release of the RAT actuator in the air and the recovery on the ground. During the locking installation process of the RAT retractable valve seal sleeve, the Wedgpak seal inside the seal sleeve will pass through a groove transition section at the end of the valve core. During the installation process, due to the large return spring force inside the RAT retractable valve, it is very easy to cause the seal to be scratched when passing through the groove transition section, causing seal failure and oil leakage. Utility Model Content

[0003] Purpose of the utility model: In view of the problems existing in the prior art, the purpose of the utility model is to provide a groove protection tooling for installing the sealing member of a RAT retractable valve sealing sleeve through the valve core, which can protect the internal Wedgpak seal from being scratched when passing through the transition section of the groove at the end of the valve core during the locking installation process of the RAT retractable valve sealing sleeve.

[0004] Technical Solution

[0005] The sealing sleeve of the RAT retractable valve is installed through the groove protection tooling of the valve core, including a sleeve 1, a spring 2, a spring seat 3 and a guide sleeve 4. The spring 2 is arranged in the inner hole of the sleeve 1, one end of the spring 2 contacts with the top of the inner hole of the sleeve 1, and the other end contacts with the spring seat 3 slidably arranged in the inner hole of the sleeve 1. The spring seat 3 is provided with a guide sleeve 4, and a rectangular groove is arranged at the end of the guide sleeve 4. The notch of the rectangular groove is an arc surface, the rectangular groove cooperates with the end shaft section of the valve core, the arc surface cooperates with the end transition section of the valve core, and the outer circumferential surface of the guide sleeve 4 is flush with the outer circumferential surface of the valve core.

[0006] Furthermore, a boss is provided at the top of the inner hole of the sleeve 1 , and one end of the spring 2 is sleeved on the boss to fix and support the spring 2 .

[0007] Furthermore, a tapered hole is provided at the bottom of the spring seat 3, and a positioning shaft is provided at the center of the tapered hole.

[0008] Furthermore, the outer circumferential surface of the top of the guide sleeve 4 is set as a conical surface, which is installed in cooperation with the conical hole at the bottom of the spring seat 3.

[0009] Furthermore, a positioning groove is provided at the center of the top of the guide sleeve 4 , and is installed in cooperation with the positioning shaft at the center of the tapered hole of the spring seat 3 .

[0010] Furthermore, the inner diameter of the sleeve 1 is not less than the inner diameter of the contact surface of the RAT retractable valve sealing sleeve, and the outer diameter of the sleeve 1 is not greater than the outer diameter of the contact surface of the RAT retractable valve sealing sleeve.

[0011] Technical effect:

[0012] 1) The guide sleeve fills the groove at the end of the valve core, which can ensure that the Wedgpak seal is in uniform contact when passing through the end of the valve core and will not be scratched by the groove. 2) The preload spring applies preload force to the guide sleeve to ensure that the guide sleeve will not loosen and affect the installation effect. 3) The spring seat supports the spring. The ejector pin at the bottom of the spring seat and the pinhole of the guide sleeve can fix the spring seat and the spring to prevent the spring from twisting. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is an initial state diagram of the use process of the utility model;

[0015] Figure 3 It is a final state diagram of the use process of the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the groove transition section of the utility model;

[0017] Among them, 1-sleeve, 2-spring, 3-spring seat, 4-guide sleeve, 5-valve core, 6-Wedgpak seal, 7-sealing sleeve, 8-locking nut, 9-reset spring, 10-groove transition section. DETAILED DESCRIPTION

[0018] The following embodiments are provided in conjunction with the accompanying drawings

[0019] For example, see the attached Figure 1-4 The RAT retractable valve sealing sleeve seal is installed through the groove protection tooling of the valve core, including a sleeve 1, a spring 2, a spring seat 3 and a guide sleeve 4. The spring 2 is arranged in the inner hole of the sleeve 1, one end of the spring 2 contacts with the top of the inner hole of the sleeve 1, and the other end contacts with the spring seat 3 slidably arranged in the inner hole of the sleeve 1. The spring seat 3 is provided with a guide sleeve 4, and a rectangular groove is arranged at the end of the guide sleeve 4. The notch of the rectangular groove is an arc surface, the rectangular groove cooperates with the end shaft section of the valve core, the arc surface cooperates with the end transition section of the valve core, and the outer circumferential surface of the guide sleeve 4 is flush with the outer circumferential surface of the valve core.

[0020] Furthermore, a boss is provided at the top of the inner hole of the sleeve 1 , and one end of the spring 2 is sleeved on the boss to fix and support the spring 2 .

[0021] Furthermore, the bottom of the spring seat 3 is provided with a conical hole, and a positioning shaft is provided at the center of the conical hole; the outer circumferential surface of the top of the guide sleeve 4 is provided with a conical surface, which is installed in cooperation with the conical hole at the bottom of the spring seat 3. A positioning groove is provided at the center of the top of the guide sleeve 4, which is installed in cooperation with the positioning shaft at the center of the conical hole of the spring seat 3, thereby ensuring the centration and stability of the guide sleeve during operation;

[0022] The sleeve is further pressed by a press machine to overcome the spring force of the RAT retractable valve return spring, and the sealing sleeve wrapped around the spring is pressed to the bottom;

[0023] During further pressing, the spring in the tooling presses the spring seat and the guide sleeve to prevent the guide sleeve from moving, while also playing a buffering role.

[0024] Furthermore, the inner diameter of the sleeve 1 is not less than the inner diameter of the contact surface of the RAT retractable valve sealing sleeve, and the outer diameter of the sleeve 1 is not greater than the outer diameter of the contact surface of the RAT retractable valve sealing sleeve, ensuring that the sleeve 1 can be fully pressed on the contact surface of the RAT retractable valve sealing sleeve and the force is evenly applied.

[0025] The working principle of this utility model:

[0026] like Figure 3 As shown in the figure, when using the utility model to install the sealing member of the RAT retractable valve sealing sleeve through the groove of the valve core, the rectangular groove at the bottom of the guide sleeve 4 is inserted into the shaft section at the end of the valve core, and the position of the guide sleeve is adjusted so that the arc surface of the groove fits the transition section at the end of the valve core, and the lower end surface of the sleeve is pressed into the contact surface of the upper end of the sealing sleeve; a press is used to press the upper end surface of the sleeve so that the sleeve presses the sealing sleeve and moves downward, and the Wedgpak seal in the sealing sleeve moves downward with the sealing sleeve. At this time, since the groove at the end of the valve core is filled by the guide sleeve, the Wedgpak seal is prevented from being scratched by the transition section of the groove at the end of the valve core during the movement from the outer circumferential surface of the guide sleeve 4 to the outer circumferential surface of the valve core. The spring force generated by the compression of the spring 2 by the sleeve presses the guide sleeve 4 through the spring seat 3 to prevent the guide sleeve 4 from loosening; a positioning groove is set in the center of the top of the guide sleeve 4, which is installed in coordination with the positioning shaft in the center of the tapered hole of the spring seat 3 to ensure that the guide sleeve will not shift during operation.

[0027] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. The sealing sleeve of the RAT retractable valve is installed through the groove protection tooling of the valve core. It is characterized in that It includes a sleeve, a spring, a spring seat and a guide sleeve. The spring is arranged in the inner hole of the sleeve. One end of the spring contacts the top of the inner hole of the sleeve, and the other end contacts the spring seat slidably arranged in the inner hole of the sleeve. The spring seat is provided with a guide sleeve, and a rectangular groove is provided at the end of the guide sleeve. The notch of the rectangular groove is an arc surface, the rectangular groove cooperates with the shaft section at the end of the valve core, the arc surface cooperates with the transition section at the end of the valve core, and the outer circumferential surface of the guide sleeve is flush with the outer circumferential surface of the valve core.

2. The sealing sleeve of the RAT retractable valve according to claim 1 is installed through the groove protection tooling of the valve core, It is characterized in that A boss is arranged on the top of the inner hole of the sleeve, and one end of the spring is sleeved on the boss to fix and support the spring.

3. The sealing sleeve seal of the RAT retractable valve according to claim 1 is installed through the groove protection tooling of the valve core, It is characterized in that A conical hole is arranged at the bottom of the spring seat, and a positioning shaft is arranged at the center of the conical hole.

4. The RAT retractable valve sealing sleeve seal according to claim 3 is installed through the groove protection tooling of the valve core, It is characterized in that The outer circumferential surface of the top of the guide sleeve is set as a conical surface, which is installed in cooperation with the conical hole at the bottom of the spring seat.

5. The RAT retractable valve sealing sleeve seal according to claim 4 is installed through the groove protection tooling of the valve core, It is characterized in that A positioning groove is arranged at the center of the top of the guide sleeve, and is installed in cooperation with the positioning shaft at the center of the tapered hole of the spring seat.

6. The RAT retractable valve sealing sleeve seal according to claim 4 is installed through the groove protection tooling of the valve core, It is characterized in that The inner diameter of the sleeve is not less than the inner diameter of the contact surface of the RAT retractable valve sealing sleeve, and the outer diameter of the sleeve is not greater than the outer diameter of the contact surface of the RAT retractable valve sealing sleeve.

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