CN2814035Y - Self-balance rotary sealing device - Google Patents
Self-balance rotary sealing device Download PDFInfo
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- CN2814035Y CN2814035Y CN 200520043073 CN200520043073U CN2814035Y CN 2814035 Y CN2814035 Y CN 2814035Y CN 200520043073 CN200520043073 CN 200520043073 CN 200520043073 U CN200520043073 U CN 200520043073U CN 2814035 Y CN2814035 Y CN 2814035Y
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- sealing device
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Abstract
The utility model relates to a self-balance rotary sealing device which comprises a prestress regulating mechanism and a sealing mechanism, wherein the sealing mechanism is arranged on a machine frame by the prestress regulating mechanism and is arranged in a water inlet and outlet position of the end of a cooling roller shaft arranged on the machine frame; the sealing mechanism comprises a plurality of rotary sealing units and a rotary sealing support frame; the rotary sealing units form a ring shape; each rotary sealing unit comprises a J-shaped sealing ring, a graphite packing support frame and an oil-containing graphite packing which are orderly connected; the prestress regulating mechanism comprises a prestress spring, an elastic damping body and a pressure regulating nut which are orderly connected. The utility model can automatically make up the abrasion caused by the contact friction of sealing elements and the surfaces of roller shaft class workpieces, and simultaneously, overcomes liquid pressure change and the influence on the roller shaft class workpieces caused by static pressure by using the method of impressing prestress on the roller shaft class workpieces, eliminates the axial float of a roller shaft and ensures the balance of systems of forces in the radial direction and the axial direction.
Description
Technical field
The utility model relates to a kind of self-balancing type rotating sealing device.
Background technique
Existing rotary seal technology has a lot, extensive use filled type rotary seal arranged, as the packing filling sealing, be applicable to low speed rotation operating mode in the high pressure; Compression-type rotary seal as O shape circle, is applicable to low speed operating mode in the mesolow; The flexural mode sealing, as lip-type packing, J-shaped seal ring etc. are applicable to middle low speed, the operating mode of middle pressure.
Usually rotatable seal element all will come fit applications according to the working condition that uses.The rotating sealing device of self-balancing type has a variety of forms, but be the wear automatic-compensation problem that solves sealing material mostly, or the impacting force of regulating Sealing according to pressure, consider that fluid pressure has influence on the problem of roll shaft axial force but seldom have, the operating mode higher to the axial required precision of roll shaft part, temporarily also rare solution.
Rotating sealing device is generally used for the junction of pipe fitting and revolving part, as shown in Figure 1, be connected with water or wet goods liquid in the pipe fitting 101 ' and be used for lubricated and cooling,, generally form by pipe fitting, seal element and sealing supporting frame spare etc. so SEALING FITTING 102 ' has rotation and sealing function.Because sealing material wearing and tearing in the rotary course, cause leak of liquid easily, especially under the situation that caliber heavy duty and water pressure are bigger greatly, hydraulic pressure can cause the pipe fitting axial float, in axial required precision than higher, axially do not have the equipment of location again, axial float is fatal, must remedy the defective that axial float causes.
What Chinese patent 93120025.3 was invented is a kind of self-balancing type combined high pressure sealing, what adopt is a kind of special lip seal element, utilize the unbalance stress on many limits to guarantee the self-regulation of sealing strip, or an elastomer is installed in this lip seal, as O-ring seals, utilize the bottom of its distortion extruding lip-type packing to be pressed on the roll shaft during work, reach sealing effect.This mechanism has realized the balance that the seal element radial force changes with fluid pressure, can a certain amount of wearing and tearing of compensation sealing element, but can't bear the impact leakage that the liquid working pressure sudden change brings, also can't eliminate of the impact of the axial force of fluid pressure generation roll shaft itself.
U. S. Patent 3,836, the rotary seal of 216 devices of mentioning can be free movable, utilize compressed-air actuated pressure to compress the carbon ring seal ring on sealing surface, guarantee that the carbon ring seal ring can compensate automatically after wearing and tearing, and it has pressure compensator, guarantees that carbon ring is pressed on the sealing surface of axle always, no matter be subjected to great pressure.This device is not considered the axial float of axis body equally, can not realize sealing self balancing radially.
Patent WO2004/079234 mentions a kind of rotating sealing device of liquid lubrication, comprise two positions, one is normal operation position, produce the junction plane that skew pressure is pressed on rotating sealing device on running shaft with hydraulic oil, the converse force rate of coming when the axis body aspect is bigger, when surpassing skew pressure, a plug can be connected another set of seal arrangement on the device, simultaneously because the increase of the lifting surface area of seal arrangement, can provide the pressure that is equal to converse power seal element firmly to be pressed on the rubbing surface of axis body, play the effect of self balancing pressure, guarantee sealing.This mechanism structure complexity considers that rotary seal is subjected to the effect of axial force, but does not consider how the suffered power of axis body is handled, and wants that for the present invention the axial precision problem of the axis body that solves does not solve.And, for the reply that can not change fast of the situation of fluid pressure sudden change.
U. S. Patent 6,467, mention a kind of device in 774, can realize the axial self balancing of rotary seal, the method for employing is to utilize multiple seal with O ring device, and the application hydraulic pressure installation makes them can both guarantee to guarantee sealability under high-speed case, simultaneously, owing to leave appropriate gap between every layer of sealing mechanism, contact so can guarantee when vibrations take place axis body, not influence between axis body and the rotatable seal element, guarantee sealability.This patent does not solve the axial precision problem of axis body yet, and, owing to hydraulic pressure holds out against,, big to equipment damage so its impact force that is subjected to is a rigid impulse.
Summary of the invention
The purpose of this utility model is to provide a kind of self-balancing type rotating sealing device, can remedy automatically because the wearing and tearing that seal element and the contact friction of roll shaft class workpiece surface cause; Adopt the pair roller shaft-like workpiece to apply prestressed method simultaneously, overcome the influence that fluid pressure changes and static pressure pair roller shaft-like workpiece is caused, eliminate the axial float of roll shaft, guarantee the force system in equilibrium of the radial and axial both direction of roll shaft.
For achieving the above object, the utility model provides a kind of self-balancing type rotating sealing device, and it comprises prestressing force controlling mechanism and sealing mechanism; Described sealing mechanism is installed on the frame by the prestressing force controlling mechanism, and is in the intake-outlet position of the cooling roll shaft end that is arranged on the frame;
Described sealing mechanism comprises a some rotary seals unit and a rotary seal support;
Described rotary seal unit is fixedly mounted on the frame by the rotary seal support, and is installed in cooling roll shaft water inlet and water outlet place; It comprises the J-shaped seal ring, graphite packing support and the oil-containing graphite packing that connect successively ringwise; The top of this graphite packing support and J-shaped seal ring is connected, and forms a cavity between the bottom of itself and J-shaped seal ring;
Described J-shaped seal ring utilizes the pressure of liquid, its bottom is pressed on the surface of cooling roll shaft; This J-shaped seal ring is made by rubber material, can compensate a certain amount of wearing and tearing automatically;
Described oil-containing graphite packing forms the protection chamber at the rear portion of J-shaped seal ring, forms back pressure when hydraulic pressure is undergone mutation, the mutation pressure that buffering J-shaped seal ring bears; This oil-containing graphite packing can also reduce the friction and wear between rotating sealing device and the cooling roll shaft effectively;
Water outlet place at the cooling roll shaft also is provided with sealing flange, and it is connected on the rotary seal support by the sealing flange pad;
Further, sealing mechanism also comprises a thrust bearing, and it is connected with the prestressing force controlling mechanism; Described thrust bearing can reduce the skimming wear of sealing mechanism and cooling roll axle surface of contact in when rotation servo-actuated together of cooling roll shaft, sealing mechanism is not rotated when work, and transmit the axial force that is produced by fluid pressure;
Described prestressing force controlling mechanism comprises the prestressed spring that connects successively, elastic colloid and pressure adjusting nut; It can carry out axial preposition to the cooling roll shaft, this prestressed spring imposes on the certain prestressing force of cooling roll shaft, this prestressing force is passed to the rotary seal support by pressure adjusting nut and thrust bearing simultaneously, and finally act on the frame, form seal force system, by this prestressed size of pressure adjusting nut can regulate;
Described elastic colloid can weaken and absorb the impact that fluid pressure is undergone mutation and brought;
Described prestressed spring selects for use stiffness coefficient bigger, and the elastic material that damping constant is bigger is made, and guarantees minimum installation dimension and compression ratio;
Described prestressing force controlling mechanism also comprises a spring housing that is connected that is arranged between prestressed spring and the frame, the external diameter when its internal diameter needs to be in maximum compressibility greater than prestressed spring; By regulating the axial displacement of the gap size can regulate cooling roll shaft between this connection spring housing and the frame, the axial precision of promptly regulating the cooling roll shaft.
Further, the utility model also can comprise a bearing support assembly and support sealing mechanism, bigger at the cooling roll shaft, under the also corresponding bigger situation of sealing mechanism, can prevent preponderance because of sealing mechanism self, and, causing the distortion of J RunddichtringO with oil-containing graphite packing compression tension, the situation that causes cooling water to leak takes place.
The utlity model has following advantage:
During 1, owing to the heavy duty of cooling roll shaft, the thermal expansion meeting causes the part of axial elongation that the feasibility of release is arranged, so select prestressed spring to apply pretightening force, rather than directly select fixing cooling roll shaft to make its axially locating, structure of the present invention makes its axial thermal expansion elongation act on the prestressed spring fully, prestressed spring after the compression can cause that pretightening force changes, and can not cause roll shaft distortion itself.
2, need so can regulate the decrement of prestressed spring, be applied to the precompression that cools off on the roll shaft much larger than work water pressure in the roll shaft because of the precompression that is applied to by prestressed spring on the cooling roll shaft, make it reach requirement thereby regulate by the pressure adjusting nut.
3, the compressibility of oil-containing graphite packing can change according to the size of work water pressure, and the leak of liquid amount after the compression of oil-containing graphite packing is smaller, and cooling water does not have leakage phenomenon, and sealing effect is very good.
4, the utility model can remedy automatically because the wearing and tearing that seal element and the contact friction of roll shaft class workpiece surface cause, long service life, and maintenance rate is low.
5, the utility model adopts the pair roller shaft-like workpiece to apply prestressed method, overcomes the influence that fluid pressure changes and static pressure pair roller shaft-like workpiece is caused, and eliminates the axial float of roll shaft, guarantees the force system in equilibrium of the radial and axial both direction of roll shaft.
Description of drawings
Fig. 1 is the use schematic representation of existing rotating sealing device;
The structural representation of the self-balancing type rotating sealing device that Fig. 2 provides for the utility model;
Fig. 3 is the structural representation of rotary seal unit in the utility model;
Fig. 4 is the structural representation of the self-balancing type rotating sealing device under the heavily loaded situation of the present utility model.
Embodiment
Following according to Fig. 2～Fig. 4, specify preferred forms of the present utility model.
As shown in Figure 2, be the structural representation of the self-balancing type rotating sealing device that provides of the utility model, it comprises prestressing force controlling mechanism and sealing mechanism; Described sealing mechanism is installed on the frame by the prestressing force controlling mechanism, and is in the intake-outlet position of the end of the cooling roll shaft 11 that is arranged on the frame 1;
Described sealing mechanism comprises two groups of rotary seal unit 101 and a rotary seal support 102;
Described rotary seal unit 101 is fixedly mounted on the frame 1 by rotary seal support 102, and is installed in the water inlet and the water outlet place of cooling roll shaft 11; It comprises the J-shaped seal ring 1011, graphite packing support 1012 and the oil-containing graphite packing 1013 that connect successively ringwise; The top of this graphite packing support 1012 and J-shaped seal ring 1011 is connected, and forms a cavity 1014 (referring to Fig. 3) between the bottom of itself and J-shaped seal ring 1011;
Described J-shaped seal ring 1011 utilizes the pressure of liquid, its bottom is pressed on the surface of cooling roll shaft 11; This J-shaped seal ring 1011 is made by rubber material, can compensate a certain amount of wearing and tearing automatically;
Described oil-containing graphite packing 1013 forms the protection chamber at the rear portion of J-shaped seal ring 1011, forms back pressure when hydraulic pressure is undergone mutation, the mutation pressure that buffering J-shaped seal ring 1011 bears; This oil-containing graphite packing 1013 can also reduce the friction and wear between rotary seal unit 101 and the cooling roll shaft 11 effectively;
Described sealing mechanism also is provided with sealing flange 103 at the water outlet place of cooling roll shaft 11, and it is connected on the rotary seal support 102 by sealing flange pad 104;
Further, sealing mechanism also comprises a thrust bearing 105, and it is connected with the prestressing force controlling mechanism; The servo-actuated together when 11 rotations of cooling roll shaft of described thrust bearing 105 can reduce sealing mechanism and the skimming wear of cooling off roll shaft 11 surface of contact, sealing mechanism is not rotated when work, and transmit the axial force that is produced by fluid pressure;
Described prestressing force controlling mechanism comprises the prestressed spring 201 that connects successively, elastic colloid 202 and pressure adjusting nut 203; It can carry out axial preposition to cooling roll shaft 11, this prestressed spring 201 imposes on the certain prestressing force of cooling roll shaft 11, this prestressing force is passed to rotary seal support 102 by pressure adjusting nut 203 and thrust bearing 105 simultaneously, and finally act on the frame 1, form seal force system, by this prestressed size of pressure adjusting nut 203 can regulate;
Described elastic colloid 202 can weaken and absorb the impact that fluid pressure is undergone mutation and brought;
Described prestressed spring 201 selects for use stiffness coefficient bigger, and the elastic material that damping constant is bigger is made, and guarantees minimum installation dimension and compression ratio;
Described prestressing force controlling mechanism also comprises one and is arranged on and is connected spring housing 204 between prestressed spring 201 and the frame 1, the external diameter when its internal diameter needs to be in maximum compressibility greater than prestressed spring 201; By regulating the axial displacement of the gap size can regulate cooling roll shaft 11 between this connection spring housing 204 and the frame 1, the axial precision of promptly regulating the cooling roll shaft.
Further, the utility model also can comprise a bearing support assembly 301 and support sealing mechanism (referring to Fig. 4), bigger at cooling roll shaft 11, under the also corresponding bigger situation of sealing mechanism, can prevent preponderance because of sealing mechanism self, and, causing 1011 distortion of J RunddichtringO with oil-containing graphite packing 1013 compression tensions, the situation that causes cooling water to leak takes place.
Working principle of the present utility model is as follows:
During work, the outer surface of cooling roll shaft 11 can touch the very high material of temperature, in order to play the effect of cooling, be connected with cooling water in the cooling roll shaft 11, in order to make cooling roll shaft 11 surfaces that higher rate of cooling be arranged, cooling water must pass through the inside of this roll shaft 11 to realize the target flow velocity with higher pressure.Cooling water enters cooling roll shaft 11 from the water intake of sealing mechanism, the effect of water pressure of this water inlet is in the inside of the cooling roll shaft 11 of cooling roll, hydraulic pressure is being tried hard to recommend roll shaft 11 drive pressure adjusting nuts 203 elastic colloid 202 is being pressed on the prestressed spring 201, the other end of prestressed spring 201 holds out against and is connecting spring housing 204 inside, the pressure of water finally is delivered on the frame 1, and the amount of deformation of prestressed spring 201 is depended in its impact to cooling roll shaft 11;
When cooling water when the water intake of sealing mechanism enters cooling roll shaft 11, by around rotary seal unit 101 prevent leakage of cooling water; Because the cooling water that feeds in the water intake has certain pressure, the positive pressure F1 that its meeting is certain to the positive effect of J-shaped seal ring 1011, and being in the effect of hydraulic pressure, the bottom chamfer of J-shaped seal ring 1011 has a reaction force F2 who makes progress, because the area at J-shaped seal ring 1011 bottom chamfer places is much smaller than the area in J-shaped seal ring 1011 fronts, so the reaction force F2 that makes progress is less than positive pressure F1, so deficiency so that J RunddichtringO 1011 lift, the phenomenon of leak of liquid takes place, guaranteed J RunddichtringO 1011 radially self balancing under pressure, when positive pressure F1 is big more, J-shaped seal ring 1011 is just pressed tightly more, even under the situation of this J RunddichtringO 1011 experience wear, above-mentioned active force relation can not change to some extent yet, and sealing effect is very good; When cooling water during from the water outlet water outlet of sealing mechanism, because hydraulic pressure is smaller, rotary seal unit 101 and sealing flange pad 104 can guarantee that water outlet cooling water does not take place leaks;
When the pressure of liquid changes suddenly, the liquid positive pressure F1 that acts on J-shaped seal ring 1011 fronts also changes, this moment since the leakage rate of oil-containing graphite packing 1013 less than the leakage rate of J RunddichtringO 1011, J-shaped seal ring 1011 can deform, thereby cause that the pressure in the cavity of being made up of graphite packing support 1012 and J RunddichtringO 1,011 1014 becomes big, pressure in the cavity 1014 can play a temporary transient back pressure effect, help J RunddichtringO 1011 opposing water pressures, behind stable water pressure, J RunddichtringO 1011 restores to the original state, and the pressure in the cavity 1014 equates with outside liquid pressure; Thus, can guarantee to take place the situation that cooling water leaks can not take place yet, good sealing effect in the process of fluctuation at fluid pressure.
Claims (9)
1, a kind of self-balancing type rotating sealing device comprises prestressing force controlling mechanism and sealing mechanism, and described sealing mechanism is installed on the frame by the prestressing force controlling mechanism; Be characterised in that,
Described sealing mechanism comprises some rotary seals unit (101) and a commentaries on classics sealed support (102);
Described rotary seal unit (101) is fixedly mounted on the frame (1) by rotary seal support (102), is in the water inlet and the water outlet place of the cooling roll shaft (11) that is arranged on the frame (1);
Described rotary seal unit (101) comprises the J-shaped seal ring (1011), graphite packing support (1012) and the oil-containing graphite packing (1013) that connect successively ringwise;
The bottom of described J-shaped seal ring (1011) is pressed on the surface of cooling roll shaft (11);
Described graphite packing support (1012) is connected with the top of J-shaped seal ring (1011), forms a cavity (1014) between the bottom of itself and J-shaped seal ring (1011);
Described oil-containing graphite packing (1013) forms the protection chamber at the rear portion of J-shaped seal ring (1011).
2, self-balancing type rotating sealing device as claimed in claim 1 is characterized in that, described J-shaped seal ring (1011) is made by rubber material, compensates a certain amount of wearing and tearing automatically.
3, self-balancing type rotating sealing device as claimed in claim 1, it is characterized in that, described sealing mechanism also is provided with sealing flange (103) at the water outlet place of cooling roll shaft (11), and it is connected on the rotary seal support (102) by sealing flange pad (104).
4, self-balancing type rotating sealing device as claimed in claim 1 is characterized in that, described sealing mechanism also comprises a thrust bearing (105), and it is connected with the prestressing force controlling mechanism.
5, self-balancing type rotating sealing device as claimed in claim 1, it is characterized in that, described prestressing force controlling mechanism comprises the prestressed spring (201) that connects successively, and elastic colloid (202) and pressure adjusting nut (203) are to the axial preposition of cooling roll shaft (11).
6, self-balancing type rotating sealing device as claimed in claim 5 is characterized in that, described elastic colloid (202) can weaken and absorb the impact that fluid pressure is undergone mutation and brought.
7, self-balancing type rotating sealing device as claimed in claim 5 is characterized in that, described prestressed spring (201) is big by stiffness coefficient, and the elastic material that damping constant is big is made.
8, self-balancing type rotating sealing device as claimed in claim 5, it is characterized in that, described prestressing force controlling mechanism also comprises one and is arranged on and is connected spring housing (204) between prestressed spring (201) and the frame (1), and its internal diameter needs greater than the external diameter of prestressed spring (201) when being in maximum compressibility.
9, self-balancing type rotating sealing device as claimed in claim 1 is characterized in that, also comprises a bearing support assembly (301), when cooling roll shaft (11) and sealing mechanism are heavier, and the support sealing mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520043073 CN2814035Y (en) | 2005-06-30 | 2005-06-30 | Self-balance rotary sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520043073 CN2814035Y (en) | 2005-06-30 | 2005-06-30 | Self-balance rotary sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2814035Y true CN2814035Y (en) | 2006-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520043073 Expired - Lifetime CN2814035Y (en) | 2005-06-30 | 2005-06-30 | Self-balance rotary sealing device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103752615A (en) * | 2013-12-31 | 2014-04-30 | 一重集团大连设计研究院有限公司 | Oil-gas lubrication connecting device of twenty-high rolling mill |
| CN104633125A (en) * | 2015-02-14 | 2015-05-20 | 合肥誉联信息科技有限公司 | Sealing device for cooling cylinder |
| CN106743211A (en) * | 2017-03-09 | 2017-05-31 | 李鹏飞 | Helical feed formula material handling apparatus and high-temperature reaction equipment |
| CN107023683A (en) * | 2016-03-15 | 2017-08-08 | 安徽胜方信息科技服务有限公司 | A kind of sealing device for cooling roller |
| CN108561556A (en) * | 2018-07-20 | 2018-09-21 | 株洲时代新材料科技股份有限公司 | The method and torsion bar end sealing structure for preventing galvanic corrosion by sealing |
| CN110120727A (en) * | 2018-02-05 | 2019-08-13 | 日本电产株式会社 | The manufacturing method and motor of motor |
| CN111451840A (en) * | 2020-04-08 | 2020-07-28 | 秦皇岛齐二数控机床有限公司 | High-speed self-balancing rotary table |
-
2005
- 2005-06-30 CN CN 200520043073 patent/CN2814035Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103752615A (en) * | 2013-12-31 | 2014-04-30 | 一重集团大连设计研究院有限公司 | Oil-gas lubrication connecting device of twenty-high rolling mill |
| CN104633125A (en) * | 2015-02-14 | 2015-05-20 | 合肥誉联信息科技有限公司 | Sealing device for cooling cylinder |
| CN107023683A (en) * | 2016-03-15 | 2017-08-08 | 安徽胜方信息科技服务有限公司 | A kind of sealing device for cooling roller |
| CN106743211A (en) * | 2017-03-09 | 2017-05-31 | 李鹏飞 | Helical feed formula material handling apparatus and high-temperature reaction equipment |
| CN110120727A (en) * | 2018-02-05 | 2019-08-13 | 日本电产株式会社 | The manufacturing method and motor of motor |
| CN108561556A (en) * | 2018-07-20 | 2018-09-21 | 株洲时代新材料科技股份有限公司 | The method and torsion bar end sealing structure for preventing galvanic corrosion by sealing |
| CN108561556B (en) * | 2018-07-20 | 2024-05-07 | 株洲时代新材料科技股份有限公司 | Method for preventing galvanic corrosion by sealing and sealing structure at end of torsion bar |
| CN111451840A (en) * | 2020-04-08 | 2020-07-28 | 秦皇岛齐二数控机床有限公司 | High-speed self-balancing rotary table |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150630 Granted publication date: 20060906 |
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| EXPY | Termination of patent right or utility model |