CN103925373B - A kind of mazy type shuts down bilateral sealing device - Google Patents
A kind of mazy type shuts down bilateral sealing device Download PDFInfo
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- CN103925373B CN103925373B CN201410181796.5A CN201410181796A CN103925373B CN 103925373 B CN103925373 B CN 103925373B CN 201410181796 A CN201410181796 A CN 201410181796A CN 103925373 B CN103925373 B CN 103925373B
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- ring
- chute
- labyrinth gland
- boss
- rotatingshaft
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention provides a kind of mazy type and shut down bilateral sealing device, at least comprise labyrinth gland and cover on the rotating shaft and the rotating ring rotated with the axis, labyrinth gland is mounted by means of bolts on equipment end and covers, described rotating ring cylindrically, in the middle part of it, excircle is provided with the boss that external diameter is greater than two ends external diameter, the axial two side of boss is respectively equipped with two annular grooves that position is corresponding, three equally distributed through holes are at least provided with between the bottom of two annular grooves, be provided with spring in through hole, the two ends of spring withstand on two back-up rings respectively; The excircle of described boss is evenly distributed with the chute of more than four; Jointly form the chamber of an annular between described labyrinth gland and rotating ring, in chamber, be provided with slip ring and two floating seal rings; Two floating seal rings all overlap on the rotating shaft.Device provided by the invention automatically can seal under equipment downtime state, thus stops grease by the gap between rotating ring and labyrinth gland to external leakage.
Description
Technical field
The invention provides running shaft bearing housing or gear box lubricating oil labyrinth gland in a kind of machinery, particularly relating to a kind of labyrinth-type excluder that can at once seal when shutting down, belonging to seal arrangement technical field.
Background technique
Labyrinth seal is the belt sealing tooth establishing several to be arranged in order around rotatingshaft, forms a series of gap and expansion cavity of damming between tooth and tooth, and sealed medium produces throttle effect when the gap by tortuous labyrinth and reaches the device of the object of Drain Resistance.Owing to there is gap between the rotor of labyrinth seal and casing, without solid contact, and allowed thermal expansion, therefore adapt to the occasion of high temperature, high pressure, high speed-frequency, this seal form is widely used in steam turbine, gas turbine, compressor, the axle head of blower and the sealing of each inter-stage.
Labyrinth seal in existing market, when normal fuel injection and normal rotation, generally there will not be grease to leak, this is because under rotary state, grease relies on running shaft centrifugal action to be sealed in the oil storage tank in labyrinth completely.But shut down or start process in, often can produce grease and leak, this is because equipment in the running, just can fuel cut-off after must first shutting down, and must first fuel feeding before start.And after a shutdown with start before, because equipment is in halted state, cause rely on centrifugal force realize sealing labyrinth seal then lose sealing function completely, grease flows out from the gap location of stators and rotators.For above-mentioned situation, also there is no any solution in the market, generally can only let alone to leak, so not only create waste, and befouling environment.
Summary of the invention
The invention provides a kind of mazy type and shut down bilateral sealing device, solve the deficiency in background technique, this device automatically can seal under equipment downtime state, thus stops grease by the gap between rotating ring and labyrinth gland to external leakage.
Realizing the technological scheme that above-mentioned purpose of the present invention adopts is:
A kind of mazy type shuts down bilateral sealing device, at least comprise labyrinth gland and cover on the rotating shaft and the rotating ring rotated with the axis, labyrinth gland is mounted by means of bolts on equipment end and covers, described labyrinth gland annular chamber structure, its axial two ends are equipped with towards the flange of rotating shaft direction, flange is provided with center hole and also and between rotatingshaft is provided with gap, chamber is provided with between labyrinth gland two end boss, chamber internal diameter is greater than labyrinth gland two end boss center bore, the chamber wall of chamber is provided with at least one annular oil storage tank, an interior spill port and outer spill port is provided with below chamber, described rotating ring cylindrically, its endoporus coordinates with rotatingshaft and contacts, in the middle part of it, excircle is provided with the boss that external diameter is greater than two ends external diameter, the axial cross section of described boss is rectangular, one end of rotating ring is stretched out by the central hole of labyrinth gland outboard flanges and is provided with gap with flange center hole, and the other end of rotating ring then to stretch in the center hole of labyrinth gland medial flange and is provided with gap with the center hole of labyrinth gland medial flange, boss in the middle part of rotating ring is positioned at labyrinth gland, the axial two side of boss is respectively equipped with two annular grooves that position is corresponding, back-up ring is equipped with in two annular grooves, be respectively back-up ring A and back-up ring B, its guide ring A is positioned at the side away from equipment end cap, and back-up ring B is positioned at the side near equipment end cap, three equally distributed through holes are at least provided with between the bottom of two annular grooves, two annular grooves are connected by through hole, are provided with spring in through hole, and the two ends of spring withstand on two back-up rings respectively, the excircle of described boss is evenly distributed with at least four chutes, chute in the shape of a spiral, and become 5 ~ 75 ° of angles with the center line of rotatingshaft, described chute is divided into chute A and chute B, chute A and chute B is interspersed, the wherein sense of rotation of chute A and the direction of rotation of rotatingshaft, the sense of rotation of chute B and the direction of rotation of chute A, the chamber of an annular is jointly formed between described labyrinth gland and rotating ring, slip ring and two floating seal rings are provided with in chamber, the boss of described slip ring sleeve in the middle part of rotating ring contacts with boss, described slip ring by parallel and form in circular catch A and catch B, the excircle of catch A and catch B is equipped with extend towards the direction of the other side and the gear piece intermeshed, gear piece quantity on catch A is corresponding with chute A, and cover on chute A, gear piece quantity on catch B is corresponding with chute B, and cover on chute B, the straight pin perpendicular to rotatingshaft is all inlaid with in gear piece, straight pin is arranged in chute and straight pin can slide along groove at chute, two floating seal rings are all enclosed within rotating ring, are respectively floating seal ring A and floating seal ring B, and floating seal ring A is between labyrinth gland outboard flanges and catch A, and floating seal ring B is between labyrinth gland medial flange and catch B.
The bottom surface contacted with equipment end cap in described labyrinth gland is provided with the axial seal groove of annular, is provided with axial sealing ring in axial seal groove.
Labyrinth gland outboard flanges is stretched out in one end of described rotating ring, the position of stretching out is provided with at least one bolt hole perpendicular to rotatingshaft, be provided with jackscrew in bolt hole, rotating ring is fixed on the rotating shaft by the top, top of jackscrew on the rotating shaft, drives rotating ring to rotate when rotatingshaft rotates.
The inner ring surface contacted with rotatingshaft in described rotating ring is provided with the radial seal groove of annular, is provided with radial direction seal ring in radial seal groove.
Mazy type provided by the present invention is shut down bilateral sealing device and is had the following advantages: 1, when equipment downtime, rotatingshaft rotating speed is reduced to gradually and stops operating, in the process, back-up ring A and back-up ring B ejects in the opposite direction gradually by spring under elastic force effect, catch A is subject to the active force of back-up ring A, slide along chute A at this active force lower stop piece A, to be pressed in gradually on floating seal ring A and to extrude floating seal ring A, floating seal ring A is sandwiched in contact and be extruded between the exterior edge face of catch A and the outboard flanges interior edge face of labyrinth gland and with both ends of the surface and is out of shape and realizes sealing, catch B is subject to the active force of back-up ring B simultaneously, slide along chute B at this active force lower stop piece B, being pressed in gradually on floating seal ring B and extruding floating seal ring B, floating seal ring B is sandwiched in contact and be extruded between the exterior edge face of catch B and the medial flange interior edge face of labyrinth gland and with both ends of the surface and is out of shape and realizes sealing.
2, because labyrinth gland outboard flanges is stretched out in one end of rotating ring, the position of stretching out is provided with at least one bolt hole perpendicular to rotatingshaft, be provided with jackscrew in bolt hole, rotating ring is fixed on the rotating shaft by the top, top of jackscrew on the rotating shaft, drives rotating ring to rotate when therefore rotatingshaft rotates.And the excircle of boss in the middle part of rotating ring is evenly distributed with the chute of more than four, chute in the shape of a spiral, and become 5 ~ 75 ° of angles with the center line of rotatingshaft, described chute is divided into chute A and chute B, chute A and chute B is interspersed, the wherein sense of rotation of chute A and the direction of rotation of rotatingshaft, the sense of rotation of chute B and the direction of rotation of chute A; Slip ring by parallel and form in circular catch A and catch B, the excircle of catch A and catch B is equipped with extend towards the direction of the other side and the gear piece intermeshed, gear piece quantity on catch A is corresponding with chute A, and cover on chute A, gear piece quantity on catch B is corresponding with chute B, and covering on chute B, be all inlaid with the straight pin perpendicular to rotatingshaft in gear piece, straight pin is arranged in chute and straight pin can slide along groove at chute; Therefore when rotating ring rotates with rotatingshaft, straight pin drives catch A rotate with rotatingshaft and slide to equipment end cap direction along chute A under chute A drives, under chute B drives, drive catch B rotate with rotatingshaft and slide to the direction away from equipment end cap along chute B, till catch A contacts with the boss both sides end face on excircle in the middle part of rotating ring respectively with catch B, catch A and catch B jointly by spring compresses in rotating ring.Now floating seal ring A and floating seal ring B is not subject to any extruding, floats in chamber, can not cause wearing and tearing.And the grease now in chamber, under the influence of centrifugal force, converge in the oil storage tank in the gland of labyrinth and by being arranged in spill port or outer spill port below the gland of labyrinth and be back to equipment grease chamber, can not leakage be produced.3, in the present invention, because the bottom surface contacted with equipment end cap in the gland of labyrinth is provided with the axial seal groove of annular, axial sealing ring is provided with in axial seal groove, therefore, it is possible to prevent grease from leaking between labyrinth gland and equipment end cap.4, the inner ring surface contacted with rotatingshaft in rotating ring is provided with the radial seal groove of annular, is provided with radial direction seal ring, therefore, it is possible to prevent grease from leaking out between rotatingshaft and rotating ring in radial seal groove.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram that mazy type provided by the invention shuts down bilateral sealing device;
Fig. 2 is the sectional view that mazy type provided by the invention shuts down bilateral sealing device;
Fig. 3 is the structural representation of rotating ring;
Fig. 4 is the side view of rotating ring;
Fig. 5 is the sectional view of rotating ring;
Fig. 6 is the structural representation of slip ring;
Fig. 7 is the sectional view of slip ring.
In figure: the gland of 1-labyrinth, 2-rotatingshaft, 3-equipment end cap, 4-axial sealing ring, the outer spill port of 5-, spill port in 6-, 7-jackscrew, 8-chute A, 9-chute B, 10-radial direction seal ring, 11-back-up ring A, 12-back-up ring B, 13-floating seal ring A, 14-floating seal ring B, 15-positioning block, 16-rotating ring, 17-boss, 18-gear piece, 19-slip ring, 20-catch A, 21-catch B, 22-straight pin, 23-bolt hole, 24-spring, 25-through hole.
Embodiment
Below in conjunction with drawings and the specific embodiments, detailed specific description is done to the present invention, but protection scope of the present invention is not limited to following examples.
The mazy type provided in the present embodiment shuts down the overall structure of bilateral sealing device as depicted in figs. 1 and 2; at least comprise labyrinth gland 1 and to be enclosed within rotatingshaft 2 and the rotating ring 16 rotated with the axis; the inner ring surface contacted with rotatingshaft 2 in rotating ring 16 is provided with the radial seal groove of annular; be provided with radial direction seal ring 10 in radial seal groove, can prevent grease from leaking out between rotatingshaft 2 and rotating ring 16.
Labyrinth gland 1 is mounted by means of bolts on equipment end cap 3, the described labyrinth gland annular chamber structure described in labyrinth gland 1, its axial two ends are equipped with towards the flange of rotating shaft direction, flange is provided with center hole and also and between rotatingshaft is provided with gap, chamber is provided with between labyrinth gland two end boss, chamber internal diameter is greater than labyrinth gland two end boss center bore, the chamber wall of chamber is provided with at least one annular oil storage tank, below chamber, is provided with an interior spill port 6 and outer spill port 5.The bottom surface contacted with equipment end cap 3 in labyrinth gland 1 is provided with the axial seal groove of annular, is provided with axial sealing ring 4, can prevents grease from leaking out between labyrinth gland 1 and equipment end cap 3 in axial seal groove.
The structure of described rotating ring 16 is as shown in Fig. 3, Fig. 4 and Fig. 5, described rotating ring 16 cylindrically, its endoporus coordinates with rotatingshaft and contacts, in the middle part of it, excircle is provided with the boss that external diameter is greater than two ends external diameter, the axial cross section of described boss 17 is rectangular, one end of rotating ring 16 is stretched out by the central hole of labyrinth gland outboard flanges and is provided with gap with flange center hole, and the other end of rotating ring 16 then to stretch in the center hole of labyrinth gland medial flange and is provided with gap with the center hole of labyrinth gland medial flange.Labyrinth gland outboard flanges is stretched out in one end of described rotating ring, the position of stretching out is provided with at least one bolt hole 23 perpendicular to rotatingshaft, jackscrew 7 is installed in bolt hole 23, the top of jackscrew 7 withstands on rotatingshaft 2 and is fixed on rotatingshaft 2 by rotating ring 16, drives rotating ring 16 to rotate when rotatingshaft 2 rotates.In the installation process of this device, by bolt hole 23, positioning block 15 is installed, one end of positioning block 15 is arranged in gap, and to ensure to keep rational axial clearance between rotating ring 16 and slip ring and labyrinth gland 1, positioning block 15 is removed for subsequent use when sealing device installs.
Boss 17 in the middle part of described rotating ring is positioned at labyrinth gland, the axial two side of boss 17 is respectively equipped with two annular grooves that position is corresponding, back-up ring is equipped with in two annular grooves, be respectively back-up ring A11 and back-up ring B12, its guide ring A11 is positioned at the side away from equipment end cap, back-up ring B12 is positioned at the side near equipment end cap, three equally distributed through holes 25 are at least provided with between the bottom of two annular grooves, in the present embodiment be six, two annular grooves are connected by through hole 25, be provided with spring 24 in through hole, the two ends of spring 24 withstand on two back-up rings respectively.
The excircle of described boss 17 is evenly distributed with at least four chutes, chute in the shape of a spiral, and become 5 ~ 75 ° of angles with the center line of rotatingshaft, described chute is divided into chute A8 and chute B9, chute A8 and chute B9 is interspersed, the wherein sense of rotation of chute A8 and the direction of rotation of rotatingshaft, the sense of rotation of chute B9 and the direction of rotation of chute A.In the present embodiment, chute is provided with six, and wherein chute A8 and chute B9 is three.
The chamber of an annular is jointly formed between described labyrinth gland 1 and rotating ring 16, slip ring 19 and two floating seal rings are provided with in chamber, described slip ring 19 to be enclosed within the boss in the middle part of rotating ring and to contact with boss 17, the structure of described slip ring as shown in Figure 6 and Figure 7, slip ring 19 by parallel and form in circular catch A20 and catch B21, the excircle of catch A20 and catch B21 is equipped with extend towards the direction of the other side and the gear piece 18 intermeshed, gear piece quantity on catch A20 is corresponding with chute A8, and cover on chute A8, gear piece quantity on catch B21 is corresponding with chute B9, and cover on chute B9, the straight pin 22 perpendicular to rotatingshaft is all inlaid with in gear piece 18, straight pin 22 is arranged in chute and straight pin 22 can slide along groove at chute.
Two floating seal rings are all enclosed within rotating ring, are respectively floating seal ring A13 and floating seal ring B14, and floating seal ring A13 is between labyrinth gland outboard flanges and catch A20, and floating seal ring B14 is between labyrinth gland medial flange and catch B21.
In the present embodiment, when rotating ring rotates with rotatingshaft, straight pin drives catch A rotate with rotatingshaft and slide to equipment end cap direction along chute A under chute A drives, under chute B drives, drive catch B rotate with rotatingshaft and slide to the direction away from equipment end cap along chute B, till catch A contacts with the boss both sides end face on excircle in the middle part of rotating ring respectively with catch B, catch A and catch B jointly by spring compresses in rotating ring.Now floating seal ring A and floating seal ring B is not subject to any extruding, floats in chamber, can not cause wearing and tearing.And the grease now in chamber, under the influence of centrifugal force, converge in the oil storage tank in the gland of labyrinth and by being arranged in spill port or outer spill port below the gland of labyrinth and be back to equipment grease chamber, can not leakage be produced.
When equipment downtime, rotatingshaft rotating speed is reduced to gradually and stops operating, in the process, back-up ring A and back-up ring B ejects in the opposite direction gradually by spring under elastic force effect, catch A is subject to the active force of back-up ring A, slide along chute A at this active force lower stop piece A, to be pressed in gradually on floating seal ring A and to extrude floating seal ring A, floating seal ring A is sandwiched in contact and be extruded between the exterior edge face of catch A and the outboard flanges interior edge face of labyrinth gland and with both ends of the surface and is out of shape and realizes sealing; Catch B is subject to the active force of back-up ring B simultaneously, slide along chute B at this active force lower stop piece B, being pressed in gradually on floating seal ring B and extruding floating seal ring B, floating seal ring B is sandwiched in contact and be extruded between the exterior edge face of catch B and the medial flange interior edge face of labyrinth gland and with both ends of the surface and is out of shape and realizes sealing.
Claims (4)
1. a mazy type shuts down bilateral sealing device, at least comprise labyrinth gland and overlap the rotating ring rotated on the rotating shaft and with described rotatingshaft, labyrinth gland is mounted by means of bolts on equipment end and covers, it is characterized in that: described labyrinth gland annular chamber structure, its axial two ends are equipped with towards the flange of rotating shaft direction, flange is provided with center hole and also and between rotatingshaft is provided with gap, chamber is provided with between labyrinth gland two end boss, chamber internal diameter is greater than labyrinth gland two end boss center bore, the chamber wall of chamber is provided with at least one annular oil storage tank, an interior spill port and outer spill port is provided with below chamber, described rotating ring cylindrically, its endoporus coordinates with rotatingshaft and contacts, in the middle part of it, excircle is provided with the boss that external diameter is greater than two ends external diameter, the axial cross section of described boss is rectangular, one end of rotating ring is stretched out by the central hole of labyrinth gland outboard flanges and is provided with gap with flange center hole, and the other end of rotating ring then to stretch in the center hole of labyrinth gland medial flange and is provided with gap with the center hole of labyrinth gland medial flange, boss in the middle part of rotating ring is positioned at labyrinth gland, the axial two side of boss is respectively equipped with two annular grooves that position is corresponding, back-up ring is equipped with in two annular grooves, be respectively back-up ring A and back-up ring B, its guide ring A is positioned at the side away from equipment end cap, and back-up ring B is positioned at the side near equipment end cap, three equally distributed through holes are at least provided with between the bottom of two annular grooves, two annular grooves are connected by through hole, are provided with spring in through hole, and the two ends of spring withstand on back-up ring A and back-up ring B respectively, the excircle of described boss is evenly distributed with at least four chutes, chute in the shape of a spiral, and become 5 ~ 75 ° of angles with the center line of rotatingshaft, described chute is divided into chute A and chute B, chute A and chute B is interspersed, the wherein sense of rotation of chute A and the direction of rotation of rotatingshaft, the sense of rotation of chute B and the direction of rotation of chute A, the chamber of an annular is jointly formed between described labyrinth gland and rotating ring, slip ring and two floating seal rings are provided with in the chamber of this annular, the boss of described slip ring sleeve in the middle part of rotating ring contacts with boss, described slip ring by parallel and form in circular catch A and catch B, the excircle of catch A and catch B is equipped with extend towards the direction of the other side and the gear piece intermeshed, gear piece quantity on catch A is corresponding with chute A, and cover on chute A, gear piece quantity on catch B is corresponding with chute B, and cover on chute B, the straight pin perpendicular to rotatingshaft is all inlaid with in gear piece, straight pin is arranged in chute and straight pin can slide along groove at chute, two floating seal rings are all enclosed within rotating ring, are respectively floating seal ring A and floating seal ring B, and floating seal ring A is between labyrinth gland outboard flanges and catch A, and floating seal ring B is between labyrinth gland medial flange and catch B.
2. mazy type according to claim 1 shuts down bilateral sealing device, it is characterized in that: the bottom surface contacted with equipment end cap in described labyrinth gland is provided with the axial seal groove of annular, is provided with axial sealing ring in axial seal groove.
3. mazy type according to claim 1 shuts down bilateral sealing device; it is characterized in that: labyrinth gland outboard flanges is stretched out in one end of described rotating ring; the position of stretching out is provided with at least one bolt hole perpendicular to rotatingshaft; in bolt hole, jackscrew is installed; rotating ring is fixed on the rotating shaft by the top, top of jackscrew on the rotating shaft, drives rotating ring to rotate when rotatingshaft rotates.
4. mazy type according to claim 1 shuts down bilateral sealing device, it is characterized in that: the inner ring surface contacted with rotatingshaft in described rotating ring is provided with the radial seal groove of annular, is provided with radial direction seal ring in radial seal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410181796.5A CN103925373B (en) | 2014-04-30 | 2014-04-30 | A kind of mazy type shuts down bilateral sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410181796.5A CN103925373B (en) | 2014-04-30 | 2014-04-30 | A kind of mazy type shuts down bilateral sealing device |
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| CN103925373A CN103925373A (en) | 2014-07-16 |
| CN103925373B true CN103925373B (en) | 2016-02-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106003402A (en) * | 2016-07-14 | 2016-10-12 | 安徽海龙建筑工业有限公司 | Concrete distributor used for vertical combination formwork |
| CN106986190B (en) * | 2017-05-16 | 2022-12-27 | 常州市科协减速机制造有限公司 | Sealing air seal machinery |
| CN108964328B (en) * | 2018-09-07 | 2023-08-25 | 合肥神马科技集团有限公司 | Direct-drive large-pull servo motor air film sealing device |
| CN109322986A (en) * | 2018-12-05 | 2019-02-12 | 飞翼股份有限公司 | A kind of shaft end oil seal structure of gear-box |
| CN109236996A (en) * | 2018-12-05 | 2019-01-18 | 飞翼股份有限公司 | A kind of gear-box |
| CN111779763A (en) * | 2020-07-01 | 2020-10-16 | 中车永济电机有限公司 | Axle suspension bush for direct current traction motor |
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| CN202612637U (en) * | 2012-05-14 | 2012-12-19 | 宁波安铱矢密封有限公司 | Double-end-face mechanical sealing transmission device |
| JP5456133B1 (en) * | 2012-10-05 | 2014-03-26 | 株式会社酉島製作所 | mechanical seal |
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| DE10017669A1 (en) * | 2000-04-08 | 2001-10-18 | Turbocom Turbinen Componenten | Gas-lubricated slide ring seal has buffer fluid feed arrangement connected to feed bore in ring seal with feed opening connected to sealing surfaces in fluid supply channel concentric to shaft |
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| TR01 | Transfer of patent right |
Effective date of registration: 20171124 Address after: 435300 Qichun County, Hubei Province, Chek Tung Village, Chek Tung town, Qichun County Patentee after: New Polytron Technologies Inc in Hubei Address before: No. 435300 Huanggang Road, Hubei County in Qichun Province Yang Si Ling Industrial Park, energy-saving lamps Patentee before: Hubei Xinzhi Sealing Element Co., Ltd. |