TWM571921U - Rotary shaft liquid sealing device - Google Patents

Abstract

A rotary shaft liquid sealing device comprises a casing, a rotating shaft, a surrounding wall, a rotating bed, a ring groove unit, a partitioning ring wall and a barrier liquid. The outer casing includes a casing base wall. The surrounding wall extends from the base wall of the housing toward the interior of the housing, spaced about the axis of rotation. The rotating bed includes a rotating base wall and a filling layer. The ring groove unit is fixed to the rotating bed base wall and defines a liquid sealing space, and is disposed on opposite sides of the rotating base wall respectively. The dividing ring wall extends into the liquid sealing space. When the rotating bed and the ring groove unit rotate, the barrier liquid blocks the gas adjacent to the filling layer from communicating with the gas adjacent to the rotating shaft. The novel rotary shaft liquid sealing device can achieve the gas sealing resistance by using the barrier liquid, can prevent water and gas from infiltrating to generate leakage, and can prevent oxygen from entering outside the outer casing.

Description

Rotary shaft liquid sealing device

The present invention relates to a rotary shaft liquid sealing device, in particular to a ring groove unit including a rotating base wall fixedly attached thereto, and a surrounding wall spaced apart from the rotating shaft and the ring groove unit. Rotary shaft liquid sealing device for the ring wall.

There is a gas seal resistance for a device using a rotating shaft [such as a rotary packed bed reactor or an axial flow pump], and a mechanical shaft seal is generally used [such as a cartridge seal (cartridge seal). )], but it uses mechanical components such as oil seals, springs or blades to achieve hermetic resistance, which not only limits the operating conditions such as the type of fluid contacted, ambient temperature, and peripheral speed, but also seals will follow the time of use. Gradually wear and create a gap, which causes the mechanical components to be rusted by the penetration of water and gas, increasing the friction when the bearing rotates, and thus needs to be replaced to avoid leakage. On the other hand, if the gas in the device contains a flammable gas (such as carbon monoxide or hydrogen), there is a risk of explosion if air (oxygen) outside the device penetrates into the gap and enters the device in contact with the flammable gas. In addition, the use of mechanical shaft seals often requires the supply of additional energy to overcome the friction generated by the mechanical shaft seal, as well as the cooling system to allow the mechanical shaft seal to operate smoothly. If the mechanical shaft seal is not used, sufficient airtightness cannot be produced.

Accordingly, it is an object of the present invention to provide a rotary shaft liquid sealing device that overcomes the above-described disadvantages of the prior art.

Therefore, the novel rotary shaft liquid sealing device comprises a casing, a rotating shaft, a surrounding wall, a rotating bed, a ring groove unit, a partitioning ring wall and a barrier liquid. The outer casing includes a casing base wall. The rotating shaft is disposed through the base wall of the outer casing. The surrounding wall extends from the base wall of the housing toward the interior of the housing, spaced about the axis of rotation. The rotating bed is disposed in the outer casing and includes a rotating base wall connecting the rotating shaft and a filling layer. The ring groove unit is tightly fixed to the rotating base wall and cooperates with the rotating base wall to define a liquid sealing space therebetween, and the ring groove unit and the filling layer are respectively disposed on the rotating base wall Two opposite sides. The partitioning ring wall extends from the surrounding wall into the liquid sealing space and is spaced around the rotating shaft such that the liquid sealing space has a first region and a second region respectively located on opposite sides of the partitioning ring wall. The barrier fluid is filled in the liquid seal space. Wherein, when the rotating shaft is externally driven to rotate to rotate the rotating bed and the ring groove unit relative to the outer casing, the blocking liquid is driven by centrifugal force while being distributed in the first region and the second region, and sealed The gas adjacent to the packed bed is in communication with a gas adjacent to the rotating shaft.

The utility model has the advantages that the rotary shaft liquid sealing device of the present invention is arranged by the annular groove unit and the surrounding wall and the partitioning ring wall, so that the blocking liquid can synchronously block the gas adjacent to the filling layer and the adjacent rotation. The gas of the shaft is in communication to prevent water vapor adjacent to the packed bed from penetrating into the oil seal to cause leakage. On the other hand, if the gas adjacent to the filling layer in the outer casing contains a flammable gas, the novel rotary shaft liquid sealing device can block the entry of air (oxygen) outside the outer casing by the barrier liquid, and there is a risk of explosion.

The following is a detailed description of this new content:

Preferably, the ring groove unit includes a first ring wall that is tightly fixed to the rotating base wall, and extends from the rotating base wall toward the outer casing base wall and spaced around the surrounding wall.

More preferably, the ring groove unit further includes a second ring wall that is fixedly secured to the first ring wall, extending from the first ring wall toward the surrounding wall and spaced around the surrounding wall.

More preferably, the first annular wall extends from the rotating base wall in the axial direction of the rotating shaft toward the outer casing base wall.

More preferably, the second annular wall extends from the first annular wall in the radial direction of the rotating shaft toward the surrounding wall.

More preferably, the ring groove unit further includes a third ring wall that is closely fixed to the second ring wall, and extends from the second ring wall in the axial direction of the rotating shaft toward the partition ring wall and is spaced around The surrounding wall.

Preferably, the partitioning ring wall extends from the surrounding wall in a radial direction of the rotating shaft toward the first annular wall of the annular groove unit into the liquid sealing space and is spaced around the rotating shaft.

Preferably, the rotary shaft liquid sealing device further comprises a conduit extending from the outside of the outer casing to the liquid sealing space to supply the barrier liquid in the liquid sealing space.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

The present invention will be further described in the following examples, but it should be understood that these examples are for illustrative purposes only and are not to be construed as limiting.

<Example>

Referring to FIG. 1, a first embodiment of the rotary shaft liquid sealing device 1 comprises a casing 2, a rotating shaft 3, a surrounding wall 22, a rotating bed 4, a ring groove unit 5, a partitioning ring wall 6, and a Barrier 7 and a conduit 8.

The outer casing 2 includes a casing base wall 21. In the present embodiment, the outer casing base wall 21 is the bottom wall of the outer casing 2.

The rotating shaft 3 is bored through the outer casing base wall 21. In the present embodiment, the rotating shaft 3 is disposed on the outer casing base wall 21 by an oil seal 9.

The surrounding wall 22 extends from the outer casing wall 21 toward the inside of the outer casing 2, spaced around the axis of rotation 3.

The rotating bed 4 is disposed in the outer casing 2 and includes a rotating base wall 41 connecting the rotating shaft 3 and a filling layer 42. In the present embodiment, the rotating base wall 41 is the lower wall of the rotating bed 4.

The ring groove unit 5 is tightly fixed to the rotating base wall 41 and cooperates with the rotating base wall 41 to define a liquid sealing space 50 therebetween, and the ring groove unit 5 and the filling layer 42 are separately disposed. On opposite sides of the rotating base wall 41. The ring groove unit 5 includes a first ring wall 51 , a second ring wall 52 , and a third ring wall 53 . The first ring wall 51 is tightly fixed to the rotating base wall 41, and extends from the rotating base wall 41 in the axial direction of the rotating shaft 3 toward the outer casing base wall 21 and spaced around the surrounding wall 22. The second ring wall 52 is tightly fixed to the first ring wall 51, and the first ring wall 51 extends in the radial direction of the rotating shaft 3 toward the surrounding wall 22 and is spaced around the surrounding wall 22. The third ring wall 53 is tightly fixed to the second ring wall 52, and extends from the second ring wall 52 in the axial direction of the rotating shaft 3 toward the partition ring wall 6 and is spaced around the surrounding wall 22. In the present embodiment, the liquid sealing space 50 defined by the annular groove unit 5 in cooperation with the rotating base wall 41 is substantially in the shape of a circular column.

The partition wall 6 extends from the surrounding wall 22 in the radial direction of the rotating shaft 3 into the liquid sealing space 50 and is spaced around the rotating shaft 3, so that the liquid sealing space 50 has positions on the sides of the partitioning ring wall 6, respectively. A first area 501 and a second area 502. In the present embodiment, the first region 501 is located on the upper side of the partition ring wall 6, and the second region 502 is located on the lower side of the partition ring wall 6.

The barrier liquid 7 is filled in the liquid sealing space 50. The barrier liquid 7 may be, but not limited to, a low vapor pressure stable liquid such as water, animal and vegetable oil, mineral oil, synthetic oil (for example, synthetic ester, eucalyptus oil, perfluoropolyether, etc.) or engine oil.

The duct 8 extends from the outside of the outer casing 2 to the liquid sealing space 50 to supply the barrier liquid 7 in the liquid sealing space 50.

When the rotating shaft 3 is externally driven to rotate to rotate the rotating bed 4 and the ring groove unit 5 relative to the outer casing 2, the blocking liquid 7 is driven by centrifugal force while being distributed in the first region 501 and the second The region 502 and the gas adjacent to the filling layer 42 are in communication with the gas adjacent to the rotating shaft 3 and the oil seal 9 to prevent gas containing a large amount of water mist adjacent to the filling layer 42 from contacting the oil seal 9. On the other hand, if the gas in the outer casing 2 adjacent to the filling layer 42 contains a flammable gas (such as carbon monoxide or hydrogen), the barrier liquid 7 can block the air (oxygen) outside the outer casing 2 from entering the flammable gas. There is a danger of explosion.

Referring to Fig. 2, a second embodiment of the rotary shaft liquid sealing device 1 of the present invention is similar to the first embodiment, except that in the second embodiment, the outer casing base wall 21 is the top of the outer casing 2. a wall, the rotating base wall 41 is an upper wall of the rotating bed 4, the first region 501 is located on the lower side of the partitioning ring wall 6, the second region 502 is located on the upper side of the dividing ring wall 6, and the ring The trough unit 5 does not include a third annular wall.

In summary, the rotary shaft liquid sealing device 1 of the present invention is fixedly coupled to the rotating base wall 41 by the ring groove unit 5, and the surrounding wall 22, the partition ring wall 6 and the rotating shaft 3, the ring The tank unit 5 is spaced apart. When the ring groove unit 5 rotates, the barrier liquid 7 can synchronously block the gas adjacent to the filling layer 42 to communicate with the gas adjacent to the rotating shaft 3 and the oil seal 9, so as to avoid adjacent filling. The gas containing a large amount of water mist in the layer 42 contacts the oil seal 9, effectively preventing the moisture from penetrating into the gap of the oil seal 9 to cause leakage. On the other hand, if the gas in the outer casing 2 adjacent to the filling layer 42 contains a flammable gas (such as carbon monoxide or hydrogen), the novel rotary shaft liquid sealing device 1 can block the air outside the outer casing 2 by using the blocking liquid 7 ( Oxygen) enters into contact with flammable gases and poses an explosion hazard. It can be seen that the novel rotary shaft liquid sealing device 1 has a good gas seal resistance effect. In addition, the rotary shaft liquid sealing device 1 of the present invention does not require mechanical components such as springs or blades, and does not require other driving devices, can greatly reduce required consumables and energy, and can be applied to various peripheral speed operating conditions, so that the present invention can be achieved. The purpose.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

1‧‧‧Rotary shaft liquid sealing device

2‧‧‧ Shell

21‧‧‧Shell base wall

22‧‧‧ Surrounding wall

3‧‧‧Rotary axis

4‧‧‧Rotating bed

41‧‧‧Rotating base wall

42‧‧‧Filling layer

5‧‧‧ Ring groove unit

50‧‧‧Liquid sealing space

501‧‧‧ first area

502‧‧‧Second area

51‧‧‧First ring wall

52‧‧‧ second ring wall

53‧‧‧ Third ring wall

6‧‧‧Separate ring wall

7‧‧‧Barrier

8‧‧‧ catheter

9‧‧‧ oil seal

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a partial cross-sectional view showing a first embodiment of the rotary shaft liquid sealing device of the present invention; Fig. 2 is a partial cross-sectional view showing a second embodiment of the rotary shaft liquid sealing device of the present invention.

Claims (8)

A rotary shaft liquid sealing device comprising: a casing comprising a casing base wall; a rotating shaft passing through the casing base wall; a surrounding wall extending from the casing base wall toward the inside of the casing, spaced around the rotating shaft a rotating bed disposed in the outer casing, comprising a rotating base wall connecting the rotating shaft and a filling layer; a ring groove unit surrounding the surrounding wall and the rotating shaft, closely fixing the rotating base wall And cooperate with the rotating base wall to define a liquid sealing space therebetween, and the annular groove unit and the filling layer are respectively disposed on opposite sides of the rotating base wall; a partition ring wall from the surrounding wall Extending into the liquid sealing space and spaced around the rotating shaft, so that the liquid sealing space has a first region and a second region respectively located on both sides of the partitioning ring wall; and a barrier liquid filled in the liquid sealing space Wherein, when the rotating shaft is externally driven to rotate to rotate the rotating bed and the ring groove unit relative to the outer casing, the blocking liquid is driven by centrifugal force while being distributed in the first region and the second region, and Blocking Near the filling gas layer adjacent to the rotation shaft of the gas communicating. The rotary shaft liquid sealing device of claim 1, wherein the annular groove unit comprises a first annular wall fixedly attached to the rotating base wall, extending from the rotating base wall toward the outer casing base wall and spaced around The surrounding wall. The rotary shaft liquid sealing device of claim 2, wherein the annular groove unit further comprises a second annular wall fixedly attached to the first annular wall, extending from the first annular wall toward the surrounding wall and Space around the surrounding wall. A rotary shaft liquid sealing device according to claim 2, wherein the first annular wall extends from the rotating base wall in the axial direction of the rotating shaft toward the outer casing base wall. The rotary shaft liquid sealing device of claim 3, wherein the second annular wall extends from the first annular wall toward the surrounding wall in a radial direction of the rotating shaft. The rotary shaft liquid sealing device of claim 5, wherein the annular groove unit further comprises a third annular wall fixedly attached to the second annular wall, the axis of the rotating shaft from the second annular wall Extending upwardly toward the partitioning ring wall and spaced around the surrounding wall. The rotary shaft liquid sealing device of claim 2, wherein the partitioning ring wall extends from the surrounding wall in a radial direction of the rotating shaft toward the first annular wall of the annular groove unit into the liquid sealing space and is spaced around The axis of rotation. The rotary shaft liquid sealing device of claim 1, further comprising a conduit extending from the outside of the outer casing to the liquid sealing space to supply the barrier liquid in the liquid sealing space.