JPH04109496U - Sealing device for movable wing operating mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] To reliably prevent shaft wear. [Structure] An operating rod 2 is disposed inside a main shaft 1, and a rod 3 that moves linearly while rotating together with the main shaft 1 is fitted to the tip side of the operating rod 2. A sealing member 9 such as a bellows having flexibility in the axial direction is provided between the operating rod 2 and the main shaft 1.
Attach. In order to prevent the liquid sealed in the runner boss 8 from leaking to the drive device 4 side, an auxiliary seal member 10 is fitted around the operating rod 2 . A drain hole 11 is bored on the front side of the auxiliary seal member 10, and a drain receiver 12 communicating with the drain hole 11 is provided. A leak detector 13 is attached to the drain receiver 12 so that leaks can be automatically detected.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a sealing device applied to a movable blade operating mechanism of a pump product.

0002

[Conventional technology]

Conventionally, in pump products, the inside of the runner boss where the movable vane operating mechanism is installed is sealed. The mechanical parts have been lubricated by the lubricating oil contained therein. However, the runner It is impossible to completely seal the lubricating oil inside the boss, and recently, efforts have been made to prevent environmental deterioration. Therefore, a method of lubricating the inside of the runner boss with fresh water is being implemented.

0003 In addition, the operating force required to operate the wings is controlled by a balcoon located far from the runner boss. Since it is generated by a runner, hydraulic piston, etc., it is natural that the device and the operation inside the runner boss are connected. An operating rod is required to connect the operating mechanism.

0004

[Problem that the idea aims to solve]

Therefore, in order to prevent the above-mentioned lubricating oil or clean water from leaking through this operating rod, In some cases, seals made of polymeric materials such as O-rings and V-rings are used. Ru. However, when using this seal, shaft friction due to sliding friction with the seal There was a problem of wear and tear.

[0005] This invention was devised to solve the problems of the conventional technology. To provide a sealing device for a movable wing operating mechanism that can reliably prevent wear and tear. The purpose is to

[0006]

[Means to solve the problem]

In order to solve the above problems, the present invention has been developed to prevent the liquid sealed inside the runner boss from leaking to the outside. The system of the movable wing operating mechanism has a sealing member between the operating rod and the main shaft to prevent leakage. In the sealing device, the sealing member is made of a member that is flexible in the axial direction. In addition, a detection means for detecting liquid leaking from the seal member is provided. .

[0007]

[Effect]

According to the above means, the shaft is used as a sealing member provided between the operating rod and the main shaft. Used for directionally flexible members, such as mechanical seals under high pressure and high speed conditions. We use parts such as welded bellows, which are Therefore, the main shaft and seal part It is possible to eliminate the sliding friction between the shaft and the material, and prevent the occurrence of shaft wear.

[0008]

【Example】

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIG. Figure 1 shows the book It is a sectional view showing a sealing device of a movable wing operation mechanism concerning an example.

[0009] In FIG. 1, an operating rod 2 is disposed inside a main shaft 1, and the tip of the operating rod 2 is A rod 3 that moves linearly while rotating together with the main shaft 1 is fitted on the end side. There is.

0010 In movable vane pumps, the driving force is the blade opening/closing force generated by a balcon, hydraulic piston, etc. It is transmitted to the operating rod 2 via the moving device 4, and furthermore, it is transmitted directly to the operating rod 2 along the guide rod 5. It is configured to convert linear operation into rotational movement of the vane 7 by a link mechanism 6. .

[0011] The lubricant (for example, water) for this movable blade operating mechanism is sealed in the runner boss 8. In order to avoid mixing with the liquid (e.g. oil) on the drive device 4 side, a seal is installed. The structure is such that a member 9 is installed between the operating rod 2 and the main shaft 1.

0012 As described above, the rod 3 moves linearly while rotating together with the main shaft 1. Therefore, the sealing member 9 can follow the movement in the linear direction, that is, it has flexibility in the axial direction. It is made of members such as bellows that have a

[0013] In addition, in the event that the seal member 9 is damaged, the sealed liquid in the runner boss 8 will be removed from the operating rod 2. The liquid is transmitted through the gap between the main shaft 1 and the main shaft 1, but this prevents the sealed liquid from leaking to the drive device 4 side. Therefore, the structure is such that an auxiliary seal member 10 is fitted around the operating rod 2.

[0014] Furthermore, in the main shaft 1, a drain hole 11 is provided on the front side of the auxiliary seal member 10. A drain receiver 12 which is bored and communicates with the drain hole 11 is located outside the main shaft 1. It is arranged on the peripheral side, and the presence or absence of leakage can be detected at the drain receiver 12 during normal inspection. It has a structure that allows A leak detector 13 is attached to the drain receiver 12. It is possible to install an automatic leak detector.

[0015]

[Effect of the idea]

As described above, according to the present invention, in the sealing device of the movable wing operating mechanism, The sealing member placed between the operating rod and the main shaft is made of a member that is flexible in the axial direction. By creating this, it is possible to eliminate sliding friction between the main shaft and the sealing member, which results in This has the excellent effect of reliably preventing the occurrence of shaft wear. In addition, the detection hand Due to the stepped structure, even if leakage occurs from the sealing member, This also has the effect that the leaked liquid can be easily detected.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a sealing device of a movable wing operating mechanism according to an embodiment of the present invention.

[Explanation of symbols]

1 Main shaft 2 Operation stick 3 rod 4 Drive device 5 Guide rod 6 Link mechanism 7 Vane 8 Runner Boss 9 Seal member 10 Auxiliary seal member 11 Drain hole 12 Drain receiver 13 Leak detector

Claims (1)

[Scope of utility model registration request] Claims: 1. A sealing device for a movable blade operating mechanism in which a sealing member is disposed between an operating rod and a main shaft to prevent liquid sealed in a runner boss from leaking to the outside, wherein the sealing member is made flexible in the axial direction. 1. A sealing device for a movable blade operating mechanism, characterized in that the sealing device is made of a member having a sealing member, and is provided with a detection means for detecting liquid leaked from the sealing member.