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Sealing device

A technology of sealing device and sealing fluid, which is applied in the direction of engine sealing, bearings, shafts, etc., can solve the problems of increasing the number of parts, increasing the size of the radial direction, and not being able to apply mechanical seals as they are, so as to improve the sealing performance , The effect of preventing the increase of slip torque and suppressing the increase of viscosity

Active Publication Date: 2017-05-31
EAGLE INDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned prior art is a built-in mechanical seal in which the fluid to be sealed leaks in the inner diameter direction of the sealing surface. Since the pumping ring 53 is additionally provided on the rotating shaft 51, the number of parts increases and the radial dimension increases.
In addition, there is also a need to provide an external circulation device for circulating the fluid to be sealed through the external pipe 56, and this external circulation device cannot be applied as it is to an external mechanical seal in which the fluid to be sealed exists on the inner diameter side of the sealing surface. question

Method used

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Examples

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Effect test

Embodiment 1

[0041] refer to figure 1 , the sealing device according to Embodiment 1 of the present invention will be described.

[0042] figure 1 The first embodiment shown shows a case where the sealing device of the present invention is applied to a small pump, and the sealing device is arranged adjacent to a pump chamber for pressure-feeding liquid.

[0043] The sealing unit of this sealing device is an exterior that seals the fluid to be sealed on the side of the high-pressure fluid that leaks from the inner periphery of the sealing surface (in the present invention, it may also be referred to as "sliding surface") toward the outer periphery. form of mechanical seals.

[0044] exist figure 1 In the figure 1 The pump part 3 is formed on the left side in the middle), and the pump part 3 is formed on the other end side (in the figure 1 The right side in the center) is formed with a mechanical seal 4 as a sealing unit.

[0045] In addition, the housing 1 mainly includes a pump ...

Embodiment 2

[0085] refer to image 3 A sealing device according to Example 2 of the present invention will be described.

[0086] The sealing device involved in embodiment 2 and figure 1 as well as figure 2 The difference of Embodiment 1 shown is that the pumping groove on the outer peripheral surface of the rotating shaft is configured to transfer the sealed fluid from the sliding surface S side to the pump chamber side (the sealed fluid source side). Example 1 is basically the same, for figure 1 as well as figure 2 The same components are marked with the same symbols, and repeated descriptions are omitted.

[0087] exist image 3 Among them, a pumping groove 23 for transferring the sealed fluid from the sliding surface S side to the pump chamber 9 (the sealed fluid source side) is provided on the outer peripheral surface of the rotating shaft 2 . The pumping groove 23 is not particularly limited as long as it can transfer the fluid to be sealed from the side of the sliding sur...

Embodiment 3

[0100] refer to Figure 4 A sealing device according to Example 3 of the present invention will be described.

[0101] The sealing device involved in embodiment 3 and figure 1 The difference between Embodiment 1 and 2 is that a lip seal is used as a sealing unit instead of a mechanical seal, but other points are basically the same as Embodiment 1. figure 1 And 2, the same components are marked with the same symbols, and repeated explanations are omitted.

[0102] exist Figure 4 in, not as figure 1 As in the case of Embodiment 1 shown in 2 and 2, the fixed-side seal ring 11 is also used as a radial sliding bearing, and dedicated seal units and bearings are respectively provided.

[0103] The lip seal 30 as a sealing unit is installed in the seal cover 7 and is slidably in close contact with the peripheral surface of the rotating shaft 2, and has a first sealing lip member 31 made of rubber material disposed on the pump unit 3 side and disposed on the pump portion 3 side. ...

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PUM

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Abstract

The present invention prevents concentration of a sealed fluid near the sliding surfaces of a fixed sealing ring and a rotating sealing ring without increasing the number of parts and without providing a large scale external circulation device. Provided is a sealing device characterized in that: a shaft-sealing section comprises a radial slide bearing (11, 25) supporting a rotating shaft (2), and a sealing means (4, 30) for sealing a sealed fluid opposite to the source of the sealed fluid for the radial slide bearing (11, 25) in the rotation axis direction; and the radial slide bearing (11, 25) is provided with fluid introduction holes (20) for connecting the sealed fluid source side with the vicinity of the high pressure fluid side of the sealing means (4, 30).

Description

technical field [0001] The present invention relates to a sealing device. More specifically, the present invention relates to a sealing device capable of preventing condensation of a sealed fluid in the vicinity of a sealing unit provided in a shaft seal portion between a housing and a rotating shaft. Background technique [0002] As a seal unit that seals the shaft seal portion between the housing and the rotating shaft, there are known mechanical seals and lip seals. For example, in the case of mechanical seals, in order to cool the rotating side seal ring and Stationary side sealing ring, e.g. Figure 4 As shown, there is a known sealing device in which the pumping ring 53 is fixed at an axial position different from that of the rotating side sealing ring 52 in such a way that the sealed fluid located in the sealing space 50 flows along the axial direction of the rotating shaft 51 Installed on the rotating shaft 51, an inflow hole 54 is provided on the upstream side of th...

Claims

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Application Information

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IPC IPC(8): F16J15/34F16C17/02F16C33/74F16J15/32
CPCF16C33/74F16J15/32F16C17/02F16C37/002F16C17/14F16C2360/44F16J15/34
Inventor 板谷壮敏
Owner EAGLE INDS
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