CN103629357B - The sealing mechanism of vane type rotary valve - Google Patents
The sealing mechanism of vane type rotary valve Download PDFInfo
- Publication number
- CN103629357B CN103629357B CN201310538845.1A CN201310538845A CN103629357B CN 103629357 B CN103629357 B CN 103629357B CN 201310538845 A CN201310538845 A CN 201310538845A CN 103629357 B CN103629357 B CN 103629357B
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- ring
- floating ring
- spring
- seal
- slotted eye
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Abstract
A kind of sealing mechanism of vane type rotary valve, it is mainly: be provided with contactless special mechanical black box between valve gap and rotating shaft, outside the rotating shaft corresponding with above-mentioned special mechanical black box, be provided with axle sleeve, this special mechanical black box mainly comprises: the valve gap of band labyrinth seal mechanism and the sealing gland of band labyrinth seal mechanism and the interior set floating ring seal of Seal cage between the two.This floating ring seal comprises the process channel hole be located on valve gap, the process gas channel outlet ring of its inner is connected with interior floating ring towards the anchor ring of side medium by spring, be connected with outer floating ring by spring at the anchor ring of process gas channel outlet ring towards atmospheric side, this outer floating ring does not establish the end face of spring to be connected with the combination of floating ring with adjacent multiple retaining ring.Above-mentioned floating ring seal is positioned at atmospheric side to be fixed by the gland with labyrinth seal mechanism.The present invention can realize the zero leakage of medium; Long service life; Be used in the price of vane type rotary valve price lower than like product.
Description
technical fieldthe present invention relates to a kind of sealing mechanism of valve.
background techniqueat present, in the material cavity that vane type rotary valve valve gap and blade rotor are formed, its sealing mechanism is that valve gap is provided with filler chamber, establishes packing filling in it, and filler outside gland is fastening.Its deficiency is: this traditional sealing configuration when carrying powder or plastochondria sealing and anti-leakage poor, cause leakage rate bigger than normal, working life is short, and maintenance is frequent.
summary of the inventionthe object of the present invention is to provide the sealing mechanism of a kind of sealing and the higher vane type rotary valve of anti-leakage.Be provided with contactless special mechanical black box between valve gap and rotating shaft, sealing assembly mainly comprises: the valve gap of band labyrinth seal structure and the sealing gland of band labyrinth seal structure and the interior set floating ring seal of Seal cage between the two.Outside the rotating shaft corresponding with above-mentioned special mechanical black box, be provided with axle sleeve, preferably this axle sleeve is carry out hardening or the axle sleeve of spraying treatmen in surface.In above-mentioned special mechanical black box, the valve gap of band labyrinth seal structure, it is enclosed within axle sleeve also has with it side adjacent with medium on the bonnet central through-hole wall of certain interval to establish some annular grooves, and its cross section indention is labyrinth seal structure form.Be provided with opening beyond this valve gap labyrinth seal structure until on the central through bore wall of air side towards the slotted eye of atmospheric side and Seal cage, in Seal cage, be inlaid with floating ring seal.This floating ring seal mainly includes: retaining ring, floating ring (interior floating ring, outer floating ring), pin, spring and process gas outlet ring.Centered by this process gas outlet ring, through-hole diameter is greater than axle sleeve external diameter and cross section is the annulus of door font, and its opening, towards rotating shaft, is located in Seal cage at the bottom of the cylindrical shape relative with opening.Valve gap is provided with process channel hole, and its inner is connected with the through hole at the bottom of above-mentioned process gas outlet ring, and its outer end is located at valve gap outer surface, and the screw be connected with process gas pipeline is established in process gas passage outer end; This process gas outlet ring is towards on the anchor ring of side medium, be provided with the slotted eye of some axis and shaft parallel, spring is provided with in it, preferably ripple spring or compression type spring, the spring the other end is placed in interior floating ring slotted eye corresponding thereto, be provided with the pin of being located by spring in slotted eye, because this floating ring is located at process gas outlet ring towards side medium, be called interior floating ring.On the anchor ring of atmospheric side, the slotted eye of some axis and shaft parallel is provided with at process gas outlet ring, spring is provided with in it, the spring the other end is placed in first outer floating ring slotted eye corresponding thereto, be provided with the pin of being located by spring in slotted eye, this outer floating ring is positioned at the cylinder that process gas channel outlet ring base ring extends to atmospheric side.Because this floating ring is located at process gas outlet ring towards atmospheric side, be called outer floating ring.Above-mentioned outer floating ring does not establish the toroidal surface of the end face of spring and a retaining ring adjacent, this retaining ring cross section is L shape, its cylindrical portions is embedded in capsule walls, ring part central through bore diameter is greater than axle sleeve external diameter, this retaining ring ring part is provided with the slotted eye of some axis and shaft parallel, spring is provided with in it, the spring the other end is placed in outer floating ring that retaining ring contains slotted eye corresponding thereto, the pin of being located by spring is provided with in slotted eye, the effect one of spring and pin prevents floating ring (interior floating ring and outer floating ring) from rotating, two is by retaining ring and floating ring location, also can adapt to the change in floating ring and axle sleeve gap simultaneously.Above-mentioned retaining ring can establish 1-5 group as required with the combination of the outer floating ring contained.Above-mentioned interior floating ring and outer floating ring are central through bore and are enclosed within the rectangular annulus of axle sleeve upper section, and best outer circumferential face is jagged, to play the effect reducing rubbing surface; Floating ring establishes the end face of spring, inner peripheral surface and outer circumferential face all to have gap with adjacent parts.Above-mentioned floating ring seal is positioned at atmospheric side and is provided with the gland being fixed on the band labyrinth seal structure on valve gap by fastening piece, this gland is enclosed within axle sleeve also has with it the central through bore wall of certain interval to be provided with some annular grooves, and its cross section indention is labyrinth seal structure.
Working procedure of the present invention is roughly as follows: when vane type rotary valve rotating shaft rotates, because sealing device relies on the fluid resistance effect in seal clearance and realizes Drain Resistance, when external technique source of the gas passes into process gas in the Seal cage of rotary valve, the valve gap of gas inside floating seal and one inside floating ring of axle sleeve gap and with palace sealing configuration flows, sealing gland outside another strand of outside floating ring and with palace sealing configuration flows, because the rotating shaft of vane type rotary valve is in rotation status, inflow is floated between Sealing in Seal cage of process gas in ring seal gap and axle sleeve and forms flow field, rely on the fluid resistance effect of floating ring and shaft room, the air film with certain bearing capacity is defined under the effect of running shaft.Floating ring lifts by this air film, makes seal ring and shaft room realize gas and lubricates, thus alleviates friction, reduction wearing and tearing.Because air film is filled with the gap of seal ring, so damping gas medium leaks outside, thus serve the effect of sealing, produce reducing pressure by regulating flow effect between floating ring and rotating shaft and reach radial seal.
The present invention compared with prior art tool has the following advantages:
1, solve the deficiency of traditional packing filling, under the prerequisite that process gas furnishes good supplies to, the zero leakage of medium can be realized.
2, long service life.
3, product of the present invention is used in vane type rotary valve, can not only ensure sealability, and price is far below the price of same kind of products at abroad simultaneously.
Accompanying drawing explanation
Fig. 1 is that using state master of the present invention looks generalized section.
Fig. 2 is Fig. 1 black box enlarged schematic partial view.
embodimentlook in generalized section the sealing mechanism using state master of the vane type rotary valve shown in Fig. 1, valve body 1 has through valve pocket, its two ends are respectively equipped with import and export flange, blade rotor 2 is provided with in valve pocket, this blade rotor is located in rotating shaft 3, and these rotating shaft two ends are each passed through central through bore and the black box of two valve gaps 4, and end top is respectively equipped with rolling bearing, rolling bearing is located in the closed bearing chamber 5 that is connected with valve gap, and the coupling 6 that can be connected with speed reducer is established in rotating shaft one end.Be provided with contactless special mechanical black box between valve gap and rotating shaft, as shown in Figure 2, outside the rotating shaft corresponding with above-mentioned special mechanical black box, be provided with axle sleeve 7, this axle sleeve is carry out hardening or the axle sleeve of spraying treatmen in surface.In above-mentioned special mechanical black box, the valve gap of band labyrinth seal 8, it is enclosed within axle sleeve also has with it on the bonnet central through-hole wall of certain interval, and some annular grooves are established in side adjacent with medium, and its cross section indention is labyrinth seal structure form.Be provided with opening beyond this valve gap labyrinth seal mechanism until on the central through bore wall of air side towards the slotted eye of atmospheric side and Seal cage, in Seal cage, be inlaid with floating ring seal.Centered by the process gas outlet ring 9 of this floating ring seal, through-hole diameter is greater than axle sleeve external diameter and cross section is the annulus of door font, its opening towards rotating shaft, at the bottom of the cylindrical shape relative with opening in Seal cage.Valve gap is provided with process channel hole 10, and its inner is connected with the through hole at the bottom of above-mentioned process gas outlet ring, and its outer end is located at valve gap outer surface, and the screw be connected with process gas pipeline is established in process gas passage outer end.This process gas outlet ring is provided with the slotted eye of some axis and shaft parallel towards the anchor ring of side medium, compression type spring 11 is provided with in it, the spring the other end is placed in interior floating ring 12 slotted eye corresponding thereto, be provided with the pin 13 of being located by spring in slotted eye, interior floating ring is glass fibre filled polytetrafluoroethylene seal ring.On the anchor ring of atmospheric side, the slotted eye of some axis and shaft parallel is provided with at process gas outlet ring, spring is provided with in it, the spring the other end is placed in first outer floating ring 14 slotted eye corresponding thereto, the pin of being located by spring is provided with in slotted eye, this outer floating ring is positioned at the cylinder that process gas channel outlet ring base ring extends to atmospheric side, and outer floating ring is glass fibre and carbon graphite filled polytetrafluoroethylene.Above-mentioned outer floating ring does not establish the toroidal surface of the end face of spring and a retaining ring 15 adjacent, this retaining ring cross section is L shape, its cylindrical portions is embedded in capsule walls, ring part central through bore diameter is greater than axle sleeve external diameter, this retaining ring ring part is provided with the slotted eye of some axis and shaft parallel, is provided with spring in it, and the spring the other end is placed in outer floating ring that retaining ring contains slotted eye corresponding thereto, be provided with the pin of being located by spring in slotted eye, above-mentioned retaining ring and floating ring be combined as two groups.Above-mentioned interior floating ring and outer floating ring are central through bore and are enclosed within the rectangular annulus of axle sleeve upper section, and outer circumferential face is jagged, and floating ring establishes the end face of spring, inner peripheral surface and outer circumferential face all to have gap with adjacent parts.Above-mentioned floating ring seal is positioned at atmospheric side and is provided with the sealing gland 16 being fixed on the band labyrinth form on valve gap by fastening piece, this gland is enclosed within axle sleeve also has with it the central through bore wall of certain interval to be provided with some annular grooves, and its cross section indention is the structural type of labyrinth seal.
Claims (5)
1. the sealing mechanism of a vane type rotary valve, it is characterized in that: between valve gap and rotating shaft, be provided with contactless special mechanical black box, axle sleeve is provided with outside the rotating shaft corresponding with above-mentioned special mechanical black box, on axle sleeve, cover has the bonnet central through hole having with it certain interval, some annular grooves are established in this bonnet central through hole side adjacent with medium, its cross section indention and labyrinth seal mechanism, until the central through bore wall of air side is provided with Seal cage beyond this valve gap labyrinth seal structure, floating ring seal is inlaid with in Seal cage, centered by the process gas outlet ring of this floating ring seal, through-hole diameter is greater than axle sleeve external diameter and cross section is the annulus of door font, its opening is towards rotating shaft, at the bottom of the cylindrical shape relative with opening in Seal cage, valve gap is provided with process channel hole, its the inner is connected with the through hole at the bottom of above-mentioned process gas outlet ring, its outer end is located at valve gap outer surface, the screw be connected with process gas pipeline is established in process gas passage outer end, this process gas outlet ring is provided with the slotted eye of axis and shaft parallel towards the anchor ring of side medium, spring is provided with in it, the spring the other end is placed in interior floating ring slotted eye corresponding thereto, the pin of being located by spring is provided with in slotted eye, on the anchor ring of atmospheric side, the slotted eye of axis and shaft parallel is provided with at process gas outlet ring, spring is provided with in it, the spring the other end is placed in first outer floating ring slotted eye corresponding thereto, the pin of being located by spring is provided with in slotted eye, this outer floating ring is positioned at the cylinder that process gas outlet ring base ring extends to atmospheric side, above-mentioned outer floating ring does not establish the toroidal surface of the end face of spring and a retaining ring adjacent, this retaining ring cross section is L shape, its cylindrical portions is embedded in capsule walls, ring part central through bore diameter is greater than axle sleeve external diameter, this retaining ring ring part is provided with the slotted eye of axis and shaft parallel, spring is provided with in it, the spring the other end is placed in outer floating ring that retaining ring contains slotted eye corresponding thereto, the pin of being located by spring is provided with in slotted eye, 1-5 group is established in the combination of above-mentioned retaining ring and floating ring, above-mentioned interior floating ring and outer floating ring establish the end face of spring, inner peripheral surface and outer circumferential face all have gap with adjacent parts, above-mentioned floating ring seal is positioned at atmospheric side and is provided with the gland being fixed on the band labyrinth seal structure on valve gap by fastening piece, this gland is enclosed within axle sleeve also has with it the central through bore wall of certain interval to be provided with some annular grooves, its cross section indention.
2. the sealing mechanism of vane type rotary valve according to claim 1, is characterized in that: interior floating ring and outer floating ring are central through bore and are enclosed within the rectangular annulus of axle sleeve upper section.
3. the sealing mechanism of vane type rotary valve according to claim 1 and 2, is characterized in that: axle sleeve is carry out hardening or the axle sleeve of spraying treatmen in surface.
4. the sealing mechanism of vane type rotary valve according to claim 3, is characterized in that: interior floating ring is glass fibre filled polytetrafluoroethylene seal ring.
5. the sealing mechanism of vane type rotary valve according to claim 4, is characterized in that: outer floating ring is glass fibre and carbon graphite filled polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310538845.1A CN103629357B (en) | 2013-11-05 | 2013-11-05 | The sealing mechanism of vane type rotary valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310538845.1A CN103629357B (en) | 2013-11-05 | 2013-11-05 | The sealing mechanism of vane type rotary valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103629357A CN103629357A (en) | 2014-03-12 |
| CN103629357B true CN103629357B (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310538845.1A Expired - Fee Related CN103629357B (en) | 2013-11-05 | 2013-11-05 | The sealing mechanism of vane type rotary valve |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3527860A1 (en) * | 2016-10-17 | 2019-08-21 | Nok Corporation | Sealing device |
| CN107061285A (en) * | 2017-04-11 | 2017-08-18 | 东营海森密封技术有限责任公司 | A kind of float-ring sealing device and blanket gas supply system for helical-lobe compressor |
| CN111153123B (en) * | 2020-01-14 | 2021-08-27 | 煤科院节能技术有限公司 | Sealed adjustable groove rotary feeding valve |
| CN113124165B (en) * | 2021-04-29 | 2023-05-30 | 西安航天动力研究所 | Reusable combined sealing device suitable for high PV value |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0623768A1 (en) * | 1993-05-03 | 1994-11-09 | Dresser-Rand Company | Labyrinth seal |
| CN202118263U (en) * | 2011-06-22 | 2012-01-18 | 湖北省风机厂有限公司 | Graphite nitrogen sealing device of gas pressuring machine |
| CN102348915A (en) * | 2009-03-10 | 2012-02-08 | 西门子公司 | Shaft seal for a turbomachine |
| CN202302268U (en) * | 2011-09-23 | 2012-07-04 | 宝山钢铁股份有限公司 | Labyrinth type sealed rotary valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60249606A (en) * | 1984-05-23 | 1985-12-10 | Fuji Electric Co Ltd | Shaft seal device in steam turbine |
| JPH08121109A (en) * | 1994-10-28 | 1996-05-14 | Mitsubishi Heavy Ind Ltd | Oil film seal |
-
2013
- 2013-11-05 CN CN201310538845.1A patent/CN103629357B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0623768A1 (en) * | 1993-05-03 | 1994-11-09 | Dresser-Rand Company | Labyrinth seal |
| CN102348915A (en) * | 2009-03-10 | 2012-02-08 | 西门子公司 | Shaft seal for a turbomachine |
| CN202118263U (en) * | 2011-06-22 | 2012-01-18 | 湖北省风机厂有限公司 | Graphite nitrogen sealing device of gas pressuring machine |
| CN202302268U (en) * | 2011-09-23 | 2012-07-04 | 宝山钢铁股份有限公司 | Labyrinth type sealed rotary valve |
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| CN103629357A (en) | 2014-03-12 |
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Granted publication date: 20151118 Termination date: 20191105 |
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| CF01 | Termination of patent right due to non-payment of annual fee |