CN103925373A - Labyrinth type halt two-way sealing device - Google Patents
Labyrinth type halt two-way sealing device Download PDFInfo
- Publication number
- CN103925373A CN103925373A CN201410181796.5A CN201410181796A CN103925373A CN 103925373 A CN103925373 A CN 103925373A CN 201410181796 A CN201410181796 A CN 201410181796A CN 103925373 A CN103925373 A CN 103925373A
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- ring
- chute
- rotatingshaft
- labyrinth gland
- boss
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- Sealing Devices (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The invention provides a labyrinth type halt two-way sealing device. The labyrinth type halt two-way sealing device at least comprises a labyrinth gland and a movable ring, wherein a rotary shaft is sleeved with the movable ring; the movable ring can rotate along with the rotary shaft; the labyrinth gland is fixedly installed on an equipment end cover through a bolt; the movable ring is cylindrical; the outer circumference of the middle of the movable ring is provided with a boss; the outer diameter of the boss is greater than those of the two ends; the two side walls in the axial direction of the boss are provided with two annular grooves corresponding to each other in position; the position between the bottoms of the two annular grooves is at least provided with three evenly distributed through holes; springs are arranged inside the through holes; the two ends of the springs abut against two check rings; the outer circumference of the boss is evenly provided with four or more sliding grooves; an annular cavity is formed between the labyrinth gland and the movable ring; the cavity is internally provided with a sliding ring and two floating sealing rings; the rotary shaft is sleeved with the two floating sealing rings. The device can achieve automatic sealing under the equipment halt state, and therefore grease is prevented from being outwards leaked from a gap between the movable ring and the labyrinth gland.
Description
Technical field
The invention provides running shaft bearing housing or gear box lubricating oil labyrinth gland in a kind of machinery, relate in particular to a kind of labyrinth-type excluder that can at once seal in the time shutting down, belong to seal arrangement technical field.
Background technique
Labyrinth seal is around rotatingshaft, to establish the belt sealing tooth that several are arranged in order, and forms a series of gap and expansion cavitys of damming between tooth and tooth, and sealed medium produces throttle effect and reach the device of the object of Drain Resistance in the time of the gap by tortuous labyrinth.Owing to having gap between the rotor of labyrinth seal and casing, contact without solid, and allowed thermal expansion, and therefore adapting to the occasion of high temperature, high pressure, high speed-frequency, this seal form is widely used in the sealing of axle head and each inter-stage of steam turbine, gas turbine, compressor, blower.
Labyrinth seal in existing market, the in the situation that of normal fuel injection and normal rotation, generally there will not be grease to leak, and this is that grease relies on running shaft centrifugal action to be sealed in the oil storage tank in labyrinth completely because under rotary state.But shut down or the process of start in, often can produce grease and leak, this be because equipment in the running, just can fuel cut-off after must first shutting down, and must first fuel feeding before start.And after shutdown and before start, because equipment is in halted state, causing the labyrinth seal that relies on centrifugal force to realize sealing to lose sealing function completely, grease flows out from the gap location of stator and rotor.For above-mentioned situation, also there is no in the market any solution, generally can only let alone to leak, so not only produce waste, and befouling environment.
Summary of the invention
The invention provides a kind of mazy type and shut down bilateral sealing device, solved the deficiency in background technique, this device can automatically seal under equipment downtime state, thus stop 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 is shut down bilateral sealing device, at least comprise labyrinth gland and the rotating ring that is enclosed within on rotatingshaft and rotates 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 the flange towards rotating shaft direction, flange is provided with center hole and also and between rotatingshaft is provided with gap, between labyrinth gland two end boss, be provided with chamber, chamber internal diameter is greater than labyrinth gland two end boss center bores, on the wall of the chamber of chamber, be provided with at least one annular oil storage tank, below chamber, be provided with an interior spill port and outer spill port, described rotating ring is cylindric, its endoporus coordinates and contacts with rotatingshaft, its middle part 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 stretches in the center hole of labyrinth gland medial flange and is provided with gap with the center hole of labyrinth gland medial flange, the boss at rotating ring middle part is positioned at labyrinth gland, on the axial two side of boss, be respectively equipped with two corresponding annular grooves of position, in two annular grooves, be equipped with back-up ring, 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, between the bottom of two annular grooves, be at least provided with three equally distributed through holes, through hole is connected two annular grooves, is provided with spring in through hole, and the two ends of spring withstand on respectively on two back-up rings, on the excircle of described boss, be 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 are interspersed, the wherein sense of rotation of chute A and the direction of rotation of rotatingshaft, the direction of rotation of the sense of rotation of chute B and chute A, the common chamber that forms an annular between described labyrinth gland and rotating ring, in chamber, be provided with slip ring and two floating seal rings, described slip ring sleeve is on the boss at rotating ring middle part and contact with boss, described slip ring by parallel and be circular catch A and catch B and form, on the excircle of catch A and catch B, be equipped with the direction gear piece that extend and that intermesh towards the other side, 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, in gear piece, be all inlaid with the straight pin perpendicular to rotatingshaft, straight pin is arranged in chute and straight pin can slide along groove at chute, two floating seal rings are all enclosed within on 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 contacting with equipment end cap in described labyrinth gland is provided with annular axial seal groove, in axial seal groove, is provided with axial sealing ring.
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, jackscrew is installed in bolt hole, and the top of jackscrew withstands on rotatingshaft rotating ring is fixed on rotatingshaft, and rotatingshaft drives rotating ring rotation while rotation.
The inner ring surface contacting with rotatingshaft in described rotating ring is provided with annular radial seal groove, 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, in the time of equipment downtime, rotatingshaft rotating speed is reduced to and stops operating gradually, in this process, spring ejects back-up ring A and back-up ring B in the opposite direction gradually under elastic force effect, catch A is subject to the active force of back-up ring A, at this active force lower stop piece, A slides along chute A, be pressed in gradually floating seal ring A and go up and push floating seal ring A, floating seal ring A is sandwiched between the exterior edge face of catch A and the outboard flanges interior edge face of labyrinth gland and contacts with both ends of the surface and be extruded distortion and realization sealing, catch B is subject to the active force of back-up ring B simultaneously, at this active force lower stop piece, B slides along chute B, be pressed in gradually floating seal ring B and go up and push floating seal ring B, floating seal ring B is sandwiched between the exterior edge face of catch B and the medial flange interior edge face of labyrinth gland and contacts with both ends of the surface and be extruded distortion and realization 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, jackscrew is installed in bolt hole, and the top of jackscrew withstands on rotatingshaft rotating ring is fixed on rotatingshaft, drives rotating ring rotation when therefore rotatingshaft rotates.And on the excircle of the boss at rotating ring middle part, be evenly distributed with four above 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 are interspersed, the wherein sense of rotation of chute A and the direction of rotation of rotatingshaft, the direction of rotation of the sense of rotation of chute B and chute A; Slip ring by parallel and be circular catch A and catch B and form, on the excircle of catch A and catch B, be equipped with the direction gear piece that extend and that intermesh towards the other side, 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 it is upper to cover chute B, is all inlaid with the straight pin perpendicular to rotatingshaft in gear piece, and straight pin is arranged in chute and straight pin can slide along groove at chute; Therefore in the time that rotating ring rotates with rotatingshaft, straight pin drives catch A rotate and slide to equipment end cap direction along chute A with rotatingshaft under chute A drives, under driving, chute B drive catch B rotate and slide to the direction away from equipment end cap along chute B with rotatingshaft, until catch A contacts with the boss both sides end face on the excircle of rotating ring middle part respectively with catch B, catch A and catch B are squeezed in spring in rotating ring jointly.Now floating seal ring A and floating seal ring B are not subject to any extruding, in chamber, float, and can not cause wearing and tearing.And the grease in chamber now, under the effect of centrifugal force, converges in the oil storage tank in the gland of labyrinth and by the spill port or the outer spill port that are arranged in gland below, labyrinth and is back to equipment grease chamber, can not produce leakage.3, in the present invention, because the bottom surface contacting with equipment end cap in the gland of labyrinth is provided with annular axial seal groove, in axial seal groove, be provided with axial sealing ring, therefore can prevent that grease from leaking between labyrinth gland and equipment end cap.4, the inner ring surface contacting with rotatingshaft in rotating ring is provided with annular radial seal groove, is provided with radial direction seal ring in radial seal groove, therefore can prevent that grease from leaking out between rotatingshaft and rotating ring.
Brief description of the drawings
Fig. 1 is the overall structure schematic diagram that mazy type provided by the invention is shut down bilateral sealing device;
Fig. 2 is the sectional view that mazy type provided by the invention is shut 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: 1-labyrinth gland, 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, the present invention is done to detailed specific description, but protection scope of the present invention is not limited to following examples.
The overall structure of the mazy type shutdown bilateral sealing device providing in the present embodiment as depicted in figs. 1 and 2; the rotating ring 16 that at least comprises labyrinth gland 1 and be enclosed within on rotatingshaft 2 and rotate with the axis; the inner ring surface contacting with rotatingshaft 2 in rotating ring 16 is provided with annular radial seal groove; in radial seal groove, be provided with radial direction seal ring 10, can prevent that 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, labyrinth gland annular chamber structure described in described labyrinth gland 1, its axial two ends are equipped with the flange towards rotating shaft direction, flange is provided with center hole and also and between rotatingshaft is provided with gap, between labyrinth gland two end boss, be provided with chamber, chamber internal diameter is greater than labyrinth gland two end boss center bores, on the wall of the chamber of chamber, be provided with at least one annular oil storage tank, below chamber, be provided with an interior spill port 6 and outer spill port 5.The bottom surface contacting with equipment end cap 3 in labyrinth gland 1 is provided with annular axial seal groove, is provided with axial sealing ring 4 in axial seal groove, can prevent that grease from leaking out between labyrinth gland 1 and equipment end cap 3.
The structure of described rotating ring 16 is as shown in Fig. 3, Fig. 4 and Fig. 5, described rotating ring 16 is cylindric, its endoporus coordinates and contacts with rotatingshaft, its middle part 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 stretches 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 rotating ring 16 is fixed on rotatingshaft 2, and rotatingshaft 2 drives rotating ring 16 to rotate while rotation.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 keeping rational axial clearance between rotating ring 16 and slip ring and labyrinth gland 1, positioning block 15 is removed for subsequent use in the time that sealing device installs.
The boss 17 at described rotating ring middle part is positioned at labyrinth gland, on the axial two side of boss 17, be respectively equipped with two corresponding annular grooves of position, in two annular grooves, be equipped with back-up ring, 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, between the bottom of two annular grooves, be at least provided with three equally distributed through holes 25, in the present embodiment, be six, through hole 25 is connected two annular grooves, in through hole, be provided with spring 24, the two ends of spring 24 withstand on respectively on two back-up rings.
On the excircle of described boss 17, be 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 are interspersed, the wherein sense of rotation of chute A8 and the direction of rotation of rotatingshaft, the direction of rotation of the sense of rotation of chute B9 and chute A.In the present embodiment, chute is provided with six, and wherein chute A8 and chute B9 are three.
The common chamber that forms an annular between described labyrinth gland 1 and rotating ring 16, in chamber, be provided with slip ring 19 and two floating seal rings, described slip ring 19 is enclosed within on the boss in the middle part of rotating ring and contacts with boss 17, the structure of described slip ring as shown in Figure 6 and Figure 7, slip ring 19 by parallel and be circular catch A20 and catch B21 and form, on the excircle of catch A20 and catch B21, be equipped with the direction gear piece 18 that extend and that intermesh towards the other side, 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, in gear piece 18, be all inlaid with the straight pin 22 perpendicular to rotatingshaft, 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 on 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, in the time that rotating ring rotates with rotatingshaft, straight pin drives catch A rotate and slide to equipment end cap direction along chute A with rotatingshaft under chute A drives, under driving, chute B drive catch B rotate and slide to the direction away from equipment end cap along chute B with rotatingshaft, until catch A contacts with the boss both sides end face on the excircle of rotating ring middle part respectively with catch B, catch A and catch B are squeezed in spring in rotating ring jointly.Now floating seal ring A and floating seal ring B are not subject to any extruding, in chamber, float, and can not cause wearing and tearing.And the grease in chamber now, under the effect of centrifugal force, converges in the oil storage tank in the gland of labyrinth and by the spill port or the outer spill port that are arranged in gland below, labyrinth and is back to equipment grease chamber, can not produce leakage.
In the time of equipment downtime, rotatingshaft rotating speed is reduced to and stops operating gradually, in this process, spring ejects back-up ring A and back-up ring B in the opposite direction gradually 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, be pressed in gradually floating seal ring A and go up and push floating seal ring A, floating seal ring A is sandwiched between the exterior edge face of catch A and the outboard flanges interior edge face of labyrinth gland and contacts with both ends of the surface and be extruded distortion and realization sealing; Catch B is subject to the active force of back-up ring B simultaneously, at this active force lower stop piece, B slides along chute B, be pressed in gradually floating seal ring B and go up and push floating seal ring B, floating seal ring B is sandwiched between the exterior edge face of catch B and the medial flange interior edge face of labyrinth gland and contacts with both ends of the surface and be extruded distortion and realization sealing.
Claims (4)
1. a mazy type is shut down bilateral sealing device, at least comprise labyrinth gland and the rotating ring that is enclosed within on rotatingshaft and rotates with the axis, 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 the flange towards rotating shaft direction, flange is provided with center hole and also and between rotatingshaft is provided with gap, between labyrinth gland two end boss, be provided with chamber, chamber internal diameter is greater than labyrinth gland two end boss center bores, on the wall of the chamber of chamber, be provided with at least one annular oil storage tank, below chamber, be provided with an interior spill port and outer spill port, described rotating ring is cylindric, its endoporus coordinates and contacts with rotatingshaft, its middle part 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 stretches in the center hole of labyrinth gland medial flange and is provided with gap with the center hole of labyrinth gland medial flange, the boss at rotating ring middle part is positioned at labyrinth gland, on the axial two side of boss, be respectively equipped with two corresponding annular grooves of position, in two annular grooves, be equipped with back-up ring, 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, between the bottom of two annular grooves, be at least provided with three equally distributed through holes, through hole is connected two annular grooves, is provided with spring in through hole, and the two ends of spring withstand on respectively on two back-up rings, on the excircle of described boss, be 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 are interspersed, the wherein sense of rotation of chute A and the direction of rotation of rotatingshaft, the direction of rotation of the sense of rotation of chute B and chute A, the common chamber that forms an annular between described labyrinth gland and rotating ring, in chamber, be provided with slip ring and two floating seal rings, described slip ring sleeve is on the boss at rotating ring middle part and contact with boss, described slip ring by parallel and be circular catch A and catch B and form, on the excircle of catch A and catch B, be equipped with the direction gear piece that extend and that intermesh towards the other side, 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, in gear piece, be all inlaid with the straight pin perpendicular to rotatingshaft, straight pin is arranged in chute and straight pin can slide along groove at chute, two floating seal rings are all enclosed within on 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 is shut down bilateral sealing device, it is characterized in that: the bottom surface contacting with equipment end cap in described labyrinth gland is provided with annular axial seal groove, in axial seal groove, is provided with axial sealing ring.
3. mazy type according to claim 1 is shut 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; jackscrew is installed in bolt hole; the top of jackscrew withstands on rotatingshaft rotating ring is fixed on rotatingshaft, and rotatingshaft drives rotating ring rotation while rotation.
4. mazy type according to claim 1 is shut down bilateral sealing device, it is characterized in that: the inner ring surface contacting with rotatingshaft in described rotating ring is provided with annular radial seal groove, 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103925373A true CN103925373A (en) | 2014-07-16 |
| CN103925373B CN103925373B (en) | 2016-02-03 |
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|---|---|---|---|
| CN201410181796.5A Active CN103925373B (en) | 2014-04-30 | 2014-04-30 | A kind of mazy type shuts down bilateral sealing device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106986190A (en) * | 2017-05-16 | 2017-07-28 | 常州市科协减速机制造有限公司 | A kind of sealing airlock |
| CN108964328A (en) * | 2018-09-07 | 2018-12-07 | 合肥神马科技集团有限公司 | A kind of straight drive is big to draw servo motor gas film sealing device |
| CN109236996A (en) * | 2018-12-05 | 2019-01-18 | 飞翼股份有限公司 | A kind of gear-box |
| 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 |
| 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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| 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 |
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| CN108964328A (en) * | 2018-09-07 | 2018-12-07 | 合肥神马科技集团有限公司 | A kind of straight drive is big to draw servo motor gas film sealing device |
| 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 |
| CN109236996A (en) * | 2018-12-05 | 2019-01-18 | 飞翼股份有限公司 | A kind of gear-box |
| 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 |
| 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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| Publication number | Publication date |
|---|---|
| CN103925373B (en) | 2016-02-03 |
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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. |