KR20130112478A - Rotary seal unit - Google Patents

Rotary seal unit Download PDF

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Publication number
KR20130112478A
KR20130112478A KR1020120034880A KR20120034880A KR20130112478A KR 20130112478 A KR20130112478 A KR 20130112478A KR 1020120034880 A KR1020120034880 A KR 1020120034880A KR 20120034880 A KR20120034880 A KR 20120034880A KR 20130112478 A KR20130112478 A KR 20130112478A
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KR
South Korea
Prior art keywords
rotor
stator
oil
rotary seal
concave groove
Prior art date
Application number
KR1020120034880A
Other languages
Korean (ko)
Inventor
이상구
안중렬
이상혁
최용열
김명호
Original Assignee
현대중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대중공업 주식회사 filed Critical 현대중공업 주식회사
Priority to KR1020120034880A priority Critical patent/KR20130112478A/en
Publication of KR20130112478A publication Critical patent/KR20130112478A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H3/00—Propeller-blade pitch changing
    • B63H3/06—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical
    • B63H3/08—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/40—Sealings between relatively-moving surfaces by means of fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H3/00—Propeller-blade pitch changing
    • B63H3/06—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical
    • B63H3/08—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid
    • B63H2003/088—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid characterised by supply of fluid actuating medium to control element, e.g. of hydraulic fluid to actuator co-rotating with the propeller

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Sealing Devices (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Abstract

PURPOSE: A rotary seal unit is provided to improve the durability thereof by efficiently discharging foreign materials through the spiral structure of a connection groove. CONSTITUTION: A rotary seal unit comprises a rotor (5) and a stator (7). One end of the rotor is connected to the center of a main shaft (3) and is rotated through a shaft. A pair of oil through holes (5a, 5b) separated from each other are formed on the outer surface of the rotor. The stator surrounds the rotor and has a pair of oil ports (7a, 7b) corresponding to the oil through holes. Concave grooves are formed on the outer surface of the rotor and the inner surface of the stator corresponding to the outer surface of the rotor.

Description

Rotary seal unit

The present invention relates to a rotary seal device, and more particularly, to provide a concave groove continuous along the outer circumferential surface of the rotor and the inner circumferential surface of the stator, but the inner peripheral surface of the central portion of the rotor and the corresponding inner circumferential surface of the stator between the pair of oil holes The concave grooves have a cut-out groove structure, and the concave grooves on both outer peripheral surfaces of the rotor, which are both sides of a pair of oil holes and the corresponding inner peripheral surfaces of both sides of the stator, have a spiral communication groove structure in communication with each other. It is possible to obtain a pressure drop effect between the rotor and the stator by the concave groove structure without extending the gap, thereby increasing the size of the gap therebetween and consequently preventing the problem of thermal expansion due to the sintering between them. And the spiral structure of the communication groove As the month is also on the rotary seal device that makes it possible to improve the overall durability and reliability of the device as possible to minimize the problem of driving.

In general, the rotary seal device refers to a device used in the hydraulic pressure distribution device for adjusting the pitch of the ship steering system (thruster).

Looking at such a rotary seal device of the prior art as follows.

As shown in Figure 1, the rotary seal device of the prior art is the rotor is provided with a pair of oil through holes (5a, 5b) is axially rotated to the center of the main shaft (3) and spaced apart at regular intervals on the outer peripheral surface (5) and the stator (7) provided with a pair of oil ports (7a, 7b) on the same axial line with the pair of oil through holes (5a, 5b) and wrapped close to the outer peripheral portion of the rotor (5) It is configured to include.

Reference numeral 9 denotes a bearing disposed between the rotor 5 and the stator 7.

The rotary seal device of the prior art in such a configuration is that when the oil is supplied to any one oil port 7a of the oil port of the stator 7 while the rotor 5 of the main shaft 3 is rotated, the supplied oil is supplied. Is supplied and circulated through the oil through hole 5a of the rotor 5 and then returned through the other oil through hole 5b and the oil port 7b adjacent thereto.

In the process of supplying and returning oil, a small amount of oil leaks into the gap between the rotor 5 and the stator 7.

However, since the rotary seal device of the prior art has no separate pressure drop means for lowering the pressure between the rotor and the stator, the rotor and the state between the rotor and the state to reduce the leakage of oil into the gap between the rotor and the stator. When the gap is narrowed, the problem of adhesion between each other arises. However, if the axial length of the gap between each other is increased to reduce the amount of leakage, the size of the whole product increases as a result.

The present invention has been made to solve this problem, provided with a concave groove continuous along the outer circumferential surface of the rotor and the inner circumferential surface of the stator, but the concave of the outer peripheral surface of the central portion of the rotor and a corresponding inner circumferential surface of the stator between the pair of oil through holes The grooves have a disconnected groove structure, and the concave grooves on both outer peripheral surfaces of the rotor, which are both sides of a pair of oil holes, and corresponding inner peripheral surfaces of both sides of the stator, have a spiral communication groove structure in communication with each other. It is possible to obtain the pressure drop effect between the rotor and the stator by the concave groove structure without extending, thereby expanding the gap size between them and consequently to prevent the problem of thermal expansion due to the seizure between them. Also, the foreign substance is discharged by the spiral structure of the communication groove As it is too easy to provide a rotary sealing device that makes it possible to improve the overall durability and reliability of the device as possible to minimize the problem of driving has its purpose.

The rotary seal device of the present invention for achieving the above object is a rotor having a pair of oil through-holes which are axially rotated and spaced apart at regular intervals on the outer circumferential surface thereof is connected to the center of the main shaft; In the rotary seal device comprising a stator wrapped in close contact with the outer peripheral portion of the rotor and provided with a pair of oil holes and a pair of oil ports on the same axial line, the outer peripheral surface of the rotor and the inner peripheral surface of the stator corresponding thereto. Recess grooves are characterized in that each provided.

In addition, in the rotary seal apparatus according to an embodiment of the present invention, the concave groove may have a continuous structure along the outer peripheral surface of each rotor and the inner peripheral surface of the stator.

In addition, in the rotary seal apparatus according to an embodiment of the present invention, the outer peripheral surface of the central portion of the rotor and the concave grooves corresponding to the central portion of the stator between the pair of oil through holes of the rotor are spaced apart from each other at predetermined intervals. In the plurality of disconnection groove structure that is disconnected from each other can be made.

In addition, in the rotary seal device according to an embodiment of the present invention, the concave groove may have a square groove structure having a square shape.

In addition, in the rotary seal device according to an embodiment of the present invention, the outer peripheral surface of the both sides of the rotor which is a pair of both sides of the oil through hole of the rotor and the concave grooves of the inner peripheral surface of the both sides of the corresponding stator communicate with each other It can be set as a groove structure.

In the rotary seal apparatus according to an embodiment of the present invention, the recessed groove of the rotor is based on the rotation of the shaft in the counterclockwise direction of the rotor, and the recessed groove of the main shaft side communicates with the right-hand screw direction. The concave groove on the outer side of the opposite side can be communicated in the left screw direction.

In addition, in the rotary seal apparatus according to an embodiment of the present invention, the concave groove of the stator is opposed to the concave groove of the rotor so that the concave groove on the side of the main shaft is in communication with the left screw direction and the outer side of the opposite side The concave groove of may be in communication with the right-hand screw direction.

As described above, the rotary seal device of the present invention provides a concave groove continuous along the outer circumferential surface of the rotor and the inner circumferential surface of the stator, but the concave groove of the outer peripheral surface of the central portion of the rotor and a corresponding inner circumferential surface of the stator between the pair of oil through holes They have a cut-out groove structure and concave grooves on both outer circumferential surfaces of the rotor, which are both sides of a pair of oil holes, and corresponding inner circumferential surfaces of both sides of the stator, have a spiral communication groove structure in communication with each other, thereby basically extending the length of the rotor. It is possible to obtain the pressure drop effect between the rotor and the stator by the concave groove structure, thereby expanding the size of the gap therebetween and consequently to prevent the problem of thermal expansion due to the sintering between them. In addition, when the foreign substance is easily discharged by the spiral structure of the communication groove, This also is obtained an effect such that is possible to generally increase the durability and reliability of the device as possible to minimize the problem of driving.

1 is a schematic view showing a rotary seal device according to the prior art.
Figure 2 is a schematic diagram showing a rotary seal device according to an embodiment of the present invention.
Figure 3 is a schematic view showing a rotor of the rotary seal apparatus according to an embodiment of the present invention.
Figure 4 is a schematic diagram showing a stator of the rotary seal device according to an embodiment of the present invention.
5 is an enlarged view illustrating main parts of the rotary seal device according to an exemplary embodiment of the present invention in an enlarged manner.
6 is an enlarged view illustrating main parts of the rotary seal apparatus according to an exemplary embodiment of the present invention, in which the left part of the rotary seal device is enlarged.
FIG. 7 is an enlarged view illustrating main parts of the rotary seal device according to the exemplary embodiment of the present invention, in which the right side portion of the rotary seal device on the opposite side of the main shaft is enlarged.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

As shown in Figures 2 to 7, the rotary seal device according to an embodiment of the present invention is connected to one end of the shaft in the center of the main shaft (not shown) is a shaft rotation and a pair of oil spaced at regular intervals on the outer peripheral surface The rotor 10 provided with the through holes 10a and 10b and the outer periphery of the rotor 10 are wrapped in close contact with the pair of oil through holes 10a and 10b and the pair of oil ports 20a and 20b) including the stator 20 provided with concave grooves 11, 12, 13, 21, 22, and 23 on the outer circumferential surface of the rotor 10 and the inner circumferential surface of the stator 20 corresponding thereto. It is structured.

The concave grooves 11, 12, 13, 21, 22, and 23 have a structure continuous along the outer circumferential surface of each rotor 10 and the inner circumferential surface of the stator 20.

In addition, the concave grooves 11 and 21 of the outer peripheral surface of the central portion of the rotor 10 and the corresponding inner peripheral surface of the central portion of the stator 20 between the pair of oil through holes 10a and 10b of the rotor 10 are respectively. It has a plurality of disconnection groove structures that are disconnected from each other in a state spaced at a predetermined interval.

Here, the concave grooves 11 and 21 have a square groove structure having a rectangular shape bent at right angles.

That is, the concave groove 11 of the outer peripheral surface of the rotor 10, as shown in Figure 5, the concave groove 11 and convex protrusion (11a) having a concave-convex structure is a structure that is repeated continuously along the axial direction The concave grooves 11 have a structure in which communication between them is cut off by the convex protrusions 11a therebetween.

This structure is equally applied to the concave groove 21 and the convex protrusion 21a of the inner peripheral surface of the center portion of the stator 20.

The outer peripheral surfaces of both sides of the rotor, which are both sides of the pair of oil through holes 10a and 10b of the rotor 10, and the recessed grooves 12, 13, 22, and 23 of the inner peripheral surfaces of both sides of the stator corresponding thereto It has a communication groove structure in communication.

The recessed grooves 12 and 13 of the rotor 10 are based on the rotation of the rotor 10 in the counterclockwise direction, and the recessed grooves 12 on the main shaft side communicate in the right-hand direction. The concave grooves 13 on the opposite side are in communication with the left-hand screw direction.

The concave grooves 22 and 23 of the stator 20 face the concave grooves 12 and 13 of the rotor 10 so that the concave grooves 22 on the main shaft side communicate with the left screw direction. The concave groove 23 on the outer side of the opposite side communicates with the right-hand screw direction.

In detail, as shown in FIG. 6, the recessed groove 12 on the main shaft side of the rotor 10 has a right-handed direction, that is, when viewed in FIG. 6, the recessed groove 12 is upward from downward. Increasingly inclined toward the right side, these concave grooves 12 have a structure that communicates with each other in a spiral shape (that is, a general screw groove) along the axial direction.

In this way, the communication groove structure basically expands the gap size due to the pressure drop with the stator 20, as well as the foreign material in the concave groove 12 when the shaft rotates in the counterclockwise direction of the rotor 10. It is possible to add a function to push in the side) direction.

As shown in FIG. 7, the concave groove 13 on the outer side of the rotor shaft opposite to the main shaft 10 has a left screw direction, that is, as shown in FIG. 7, the concave groove 13 is upward from downward. It is gradually inclined leftward and these concave grooves 13 have a structure which communicates with each other in a spiral shape (that is, a general screw groove) along the axial direction.

In this way, the communication groove structure basically expands the gap size due to the pressure drop with the stator 20, as well as the foreign matter in the concave groove 13 when the shaft rotates in the counterclockwise direction of the rotor 10. It will also add the ability to push in the opposite direction).

This structure can be equally applied to the concave grooves 22 and 23 of the stator 20.

Reference numeral 30 denotes a bearing disposed between the rotor 10 and the stator 20.

Rotary seal device according to an embodiment of the present invention according to this configuration is supplied when the oil is supplied to any one of the oil port (20a) of the oil port of the stator 20 while the rotor 10 of the main shaft is rotated The oil is supplied and circulated through the oil through hole 10a of the rotor 10 arranged on the same line and then returned through the other oil through holes 10b and the oil port 20b adjacent to each other.

In the process of supplying and returning oil, a small amount of oil leaks into the gap between the rotor 10 and the stator 20.

At this time, the concave grooves 11, 12, 13, 21, 22, and 23 of the rotor 10 and the stator 20 have a pressure drop in the gap therebetween, so that the oil leakage rate can be lowered. In addition, the foreign matter and the like can be easily and quickly discharged to both ends by the helical concave grooves 12, 13, 22, 23 of the rotor 10 and the stator 20.

That is, when the shaft rotates in the counterclockwise direction of the rotor 10, foreign matter in the concave groove 12 is pushed toward the left (main shaft side) direction, and conversely, foreign matter in the concave groove 13 is removed. It will be pushed out to the right (outside the main shaft).

This can be evident from the general screw groove principle in which a foreign material in the spiral bone (corresponding to the concave grooves 12 and 13) that is inclined in a spiral shape is pushed to the spiral bone wall when the screw axis is rotated. will be.

 As described above, the rotary seal device according to an embodiment of the present invention provides a concave groove that is continuous along the outer circumferential surface of the rotor and the inner circumferential surface of the stator, but the inner circumferential surface of the central portion of the rotor and the corresponding center of the stator between the pair of oil through holes The concave grooves of the rotor have a disconnected groove structure, and the outer circumferential surfaces of both sides of the rotor, which are both sides of the pair of oil holes, and the concave grooves of the inner circumferential surfaces of the both sides of the stator corresponding to each other, form a spiral communication groove structure that communicates with each other. It is possible to obtain the pressure drop effect between the rotor and the stator by the concave groove structure without extending the length, thereby expanding the gap size between them and consequently preventing the problem of thermal expansion due to the sintering between them. It becomes possible, and the foreign substance discharge is easy by the spiral structure of the communication groove This will also minimize the problem of the driving unit will be able to improve the overall durability and reliability of the device.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It should be understood that all of the techniques that can be easily changed and used by those skilled in the art are included in the technical scope of the present invention.

DESCRIPTION OF REFERENCE NUMERALS
3: main shaft 5: rotor
5a, 5b: oil through hole 7: stator
7a, 7b: oil port 9: bearing
10: rotor 10a, 10b: oil through hole
11,12,13: concave groove 11a: convex protrusion
20: Stator 20a, 20b: Oil pot
21,22,23: concave groove 30: bearing

Claims (7)

A rotor having one end connected to the center of the main shaft and being axially rotated, and having a pair of oil through-holes spaced apart from each other on an outer circumferential surface thereof;
A stator wrapped in close contact with an outer circumference of the rotor and having a pair of oil ports formed on the same axial line as the pair of oil through holes;
In the rotary seal device configured to include,
Rotary seal device, characterized in that the recessed groove is provided on the outer peripheral surface of the rotor and the inner peripheral surface of the stator corresponding thereto. The method of claim 1,
The concave groove is a rotary seal device, characterized in that the continuous structure along the outer peripheral surface of each rotor and the inner peripheral surface of the stator. 3. The method of claim 2,
The rotary groove between the outer peripheral surface of the central portion of the rotor and the corresponding inner peripheral surface of the central portion of the stator corresponding to the pair of oil through the rotor of the rotor is characterized in that each of the plurality of disconnection groove structure which is disconnected from each other at a predetermined interval Seal device. The method of claim 3,
The concave groove is a rotary seal device, characterized in that the rectangular groove structure having a square shape. 3. The method of claim 2,
The outer seal surface of the both sides of the rotor, which is a pair of both sides of the oil through hole of the rotor and the concave grooves of the inner peripheral surface of both sides of the stator corresponding to the rotary seal device characterized in that the communication groove structure in communication with each other. The method of claim 5,
The concave groove of the rotor is based on the axial rotation of the rotor in the counterclockwise direction, the concave groove of the main shaft side is communicated in the right screw direction and the concave groove of the outer side of the opposite side is communicated in the left screw direction Rotary seal device, characterized in that. The method according to claim 6,
The concave groove of the stator is opposed to the concave groove of the rotor so that the concave groove of the main shaft side communicates in the left screw direction and the concave groove of the outer side thereof communicates in the right screw direction. Device.

KR1020120034880A 2012-04-04 2012-04-04 Rotary seal unit KR20130112478A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120034880A KR20130112478A (en) 2012-04-04 2012-04-04 Rotary seal unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120034880A KR20130112478A (en) 2012-04-04 2012-04-04 Rotary seal unit

Publications (1)

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KR20130112478A true KR20130112478A (en) 2013-10-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020120034880A KR20130112478A (en) 2012-04-04 2012-04-04 Rotary seal unit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106641571A (en) * 2016-10-13 2017-05-10 青岛智享专利技术开发有限公司 Hydraulic engineering pipeline inner wall connection sealing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106641571A (en) * 2016-10-13 2017-05-10 青岛智享专利技术开发有限公司 Hydraulic engineering pipeline inner wall connection sealing device

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