JPH1047500A - Pressure valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a blocking property by shifting a valve element through fluid pressure against a spring, opening and closing a valve seat, spherically formed contact surfaces between the valve seat and a valve element, and suppressing the influence of abrasion. SOLUTION: A valve seat 21 which is pressed by a valve cap 5 is arranged inside a body 1, while its portion being contact with a valve element 22 is conically recessed. The valve element 22 which is externally fitted to a cylindrical body 25 in a slidable manner is arranged inside a valve cap 5. The contact surface between the valve seat 21 and the valve element 22 is secured. A sufficient blocking property is thus obtained between the valve seat 21 and the valve element 22. The blocking property is not deteriorated even when a portion of the contact surfaces is thinned due to abrasion, because of the other portion keeps a contact state. Influence of the abrasion of the contact surfaces is reduced, and the service life of the valve is prolonged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure valve,
This is a technique suitable for a lubricating oil supply system of a gas turbine engine (turbo fan engine).

[0002]

2. Description of the Related Art A pressurizing valve is used, for example, to feed lubricating oil generated by a lubricating oil pump to a rotating part of a gas turbine engine or the like.

FIG. 2 shows an example of the structure of a pressurizing valve. In the figure, reference numeral 1 denotes a body, 2 denotes a lubricating oil inlet (fluid inlet), 3 denotes a valve seat, 4 denotes a valve body, 5 denotes a valve cap, 6 denotes a lubricating oil outlet (fluid outlet), 7 denotes a guide housing, 8
Is a spring, 9 is a valve chamber, 10 is a screw portion, and 11 is a sealing material.

In the pressurizing valve as shown in FIG. 2, when lubricating oil is sent to the lubricating oil inlet 2 as shown by an arrow, the rightward driving force of the valve body 4 based on the lubricating oil is applied by the spring 8. When the resilience is exceeded, the valve seat 3 is opened and the lubricating oil is sent to the lubricating oil outlet 6 via the connection flow path 7a. On the other hand, when the pressure of the lubricating oil fed into the lubricating oil inlet 2 is low, the valve element 4 comes into close contact with the valve seat 3 to shut off the flow of the lubricating oil.

[0005]

However, in the case of the pressurizing valve having the structure shown in FIG. 2, when the valve body 4 hits one side, the obstruction is reduced. Further, a small gap is required between the sliding hole 7b of the guide housing 7 and the valve body 4. However, since the flow of the lubricating oil sent from the lubricating oil inlet 2 directly hits the small gap, the lubricating oil If foreign matter such as dust enters the small space, the foreign matter enters the small gap and the valve body 4 and the guide housing 7
Slidability is easily impaired. In addition, since the resistance of only a part of the sliding portion increases, the above-described one-sided phenomenon easily occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and is intended to reduce the influence of abrasion between a valve seat and a valve body, to increase the obstruction at a contact portion between the valve seat and the valve body, It is intended to reduce the effects of foreign substances mixed in the fluid, and the like.

[0007]

A pressurizing valve for opening and closing a valve seat by moving a valve body against the resilience of a spring by the pressure of a liquid, wherein both the valve seat and the valve body are in contact with each other. A spherical structure is adopted at the location, and the radius of curvature of the spherical surface is set to be the same in the valve body and the valve seat. In addition, a structure is adopted in which a cylindrical body having a cylindrical guide surface is integrally disposed inside the body, and a valve body is disposed on the cylindrical body guide surface in an externally fitted state. A sliding sleeve that slides on a cylindrical guide surface is disposed on the back of the valve body, and a tapered portion that guides fluid is disposed on the rear end of the sliding sleeve. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a pressure valve according to the present invention will be described below with reference to FIG. In FIG. 1, reference numeral A denotes a fluid supply system, B denotes a fluid consumption system, 21 denotes a valve seat, 22 denotes a valve body, 23 denotes a sliding sleeve, 24 denotes a valve body guide, and 25 denotes a cylindrical body.

The fluid supply system A is, for example, a fluid supply system (lubricating oil pump) that uses lubricating oil as a fluid, and is connected to the lubricating oil inlet 2. The fluid consuming system B is a rotating portion (bearing portion or the like) of a gas turbine engine or the like that requires supply of lubricating oil, and is connected to a lubricating oil outlet 6.

As shown in FIG. 1, the valve seat 21 is disposed inside the body 1 while being held down by the valve cap 5, and a contact portion with the valve body 22 is formed in a concave conical surface shape.

The valve body 22 is slidably disposed inside the valve cap 5 so as to be fitted to the cylindrical body 25 and has a convex spherical contact portion with the valve seat 21. The contact surface between the concave conical surface of the valve seat 21 and the convex spherical surface of the valve body 22 is set to be reliable.

The sliding sleeve 23 is provided with a valve guide 24.
Has a cylindrical guide surface 25a slidably supported on the outer surface of the cylindrical body 25, the valve body 22 is integrally supported at the front end thereof, and a tapered portion 22a is formed at the rear end.
The tapered portion 22a is formed so as to gradually decrease in diameter toward the rear, and guides the fluid flowing through the valve chamber 9 to be guided rearward.

The valve body guide 24 is provided with a valve cap 5.
A cylindrical body 25 integrally disposed at the tip of the cylinder and supporting the sliding sleeve 23 is integrally supported, and the valve body 22 is pressed against the valve seat 21 inside the cylindrical body 25 as shown in FIG. The spring 8 for generating the force is stored.

In the pressurizing valve thus configured, a sufficient closing property is obtained in which the contact portion between the valve seat 21 and the valve body 22 is in a contact state based on the spherical shape. For example, considering a case where a thinned portion due to abrasion occurs in a part of the contact portion, the obstruction is not impaired while a portion other than the thinned portion is in a spherical contact state.

Considering that foreign matter such as dust is mixed in the lubricating oil sent into the valve chamber 9, the lubricating oil and the foreign matter do not directly enter the small gap between the sliding sleeve 23 and the cylindrical body 25. In addition, since the taper portion 22a promptly feeds the lubricating oil outlet 6 via the connection flow path 7a, foreign matter does not impair the slidability between the sliding sleeve 23 and the cylindrical body 25. Also, if the frictional resistance of a part of the sliding portion between the sliding sleeve 23 and the cylindrical body 25 increases, the valve body 2
Even if the inclination occurs in 2, the obstruction is not impaired due to the spherical structure as described above.

In the present invention, any fluid, for example, a liquid such as water, a gas, or the like can be applied instead of the lubricating oil.

[0017]

According to the pressurizing valve of the present invention, the following effects can be obtained. (1) By adopting a conical surface for the valve seat and a spherical structure for the valve body, it is possible to reduce the influence of wear of the contact portion and extend the life of the pressure valve. (2) By adopting a spherical structure, the surface contact state can be maintained and the obstruction can be improved. (3) By making the sliding sleeve integral with the valve body to be in an externally fitted state with respect to the cylindrical body, it is hard to be affected by foreign matters mixed in the fluid, and the soundness of the pressurizing valve is maintained for a long time. (4) By arranging the tapered portion at the rear end of the sliding sleeve, it is possible to improve the flow of the fluid and to suppress the adverse effect caused by the foreign matter mixed in the fluid.

[Brief description of the drawings]

FIG. 1 is a front sectional view together with a block diagram showing one embodiment of a pressure valve according to the present invention.

FIG. 2 is a front sectional view showing a conventional example of a pressure valve.

[Explanation of symbols]

 A fluid supply system B fluid consumption system 1 body 2 lubricating oil inlet (fluid inlet) 3 valve seat 4 valve body 5 valve cap 6 lubricating oil outlet (fluid outlet) 7 guide housing 7a connection flow path 7b sliding hole 8 spring 9 Valve chamber 10 Thread portion 11 Seal material 21 Valve seat 22 Valve 22a Taper 23 Sliding sleeve 24 Valve guide 25 Cylindrical body 25a Cylindrical guide surface

Claims (3)

[Claims] 1. A pressure valve for opening and closing a valve seat (21) by moving a valve body (22) against the resilience of a spring (8) by the pressure of a liquid, comprising: A pressure valve characterized in that a spherical structure is adopted at both contact points of a valve body. 2. A cylindrical body (25) having a cylindrical guide surface (25a) is integrally disposed inside a body (1), and a valve body (22) is fitted on the cylindrical guide surface (25a). The pressure valve according to claim 1, wherein 3. A sliding sleeve (23) slidable on a cylindrical guide surface (25a) is arranged on the back of the valve body (22), and guides fluid to a rear end of the sliding sleeve. 3. A pressure valve according to claim 2, wherein a taper (22a) is provided.