CN102022539A - Inverse pressing shaft rod sealing structure - Google Patents
Inverse pressing shaft rod sealing structure Download PDFInfo
- Publication number
- CN102022539A CN102022539A CN2009101959429A CN200910195942A CN102022539A CN 102022539 A CN102022539 A CN 102022539A CN 2009101959429 A CN2009101959429 A CN 2009101959429A CN 200910195942 A CN200910195942 A CN 200910195942A CN 102022539 A CN102022539 A CN 102022539A
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- China
- Prior art keywords
- gland
- cap
- bolt
- axostylus axostyle
- filler
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Abstract
The invention discloses an inverse pressing shaft rod sealing structure. An end cover and a shell cover are sleeved on a shaft rod and connected through a bolt, the lower surface of the end cover is provided with a circle of annular groove, a bolt hole penetrating the upper surface of the end cover is formed in the groove, and the inner wall of the shell cover is provided with a circle of step positioned below the groove; an inverse pressing sleeve is cylindrical, the lower end of the inverse pressing sleeve is provided with a circle of inner flange extended to the shaft rod, the outer surface of the upper end of the inverse pressing sleeve is provided with a circle of outer flange positioned on the step of the shell cover, a clearance is formed between the outer flange and the groove of the end cover, and a threaded hole is formed in the outer flange; a clearance is formed between the inverse pressing sleeve and the shaft rod; a filler is filled in the clearance between the inverse pressing sleeve and the shaft rod; the lower end of the bolt passes through the bolt hole of the end cover and is connected with the outer flange of the inverse pressing sleeve; a nut is arranged at the upper end of the bolt; and a butterfly spring is arranged between the nut and the end cover. The structure has good pressing force distribution and long service life, and reduces the workload of daily maintenance.
Description
Technical field
The present invention relates to the shaft sealing technology, particularly relate to a kind of rod seal of falling last item structure.
Background technique
The axostylus axostyle sealing is the position of the easiest appearance " run, drip, leak " in the equipment such as valve, compressor, reactor.Existing axostylus axostyle adopts the seal form of packing filling more, referring to Fig. 1, mainly rely on gland from the outside with the filler axial compression, produce radial compaction power and make filler be close to the axostylus axostyle surface and stop medium to leak outside.
Because filler is an elastic plastic body, the axial pressing force of gland is owing to the minimizing gradually vertically with the frictional force of Stuffing box inwall, so the distribution of radial compaction power to the inner, became mild after sharply successively decreasing before this by the gland end shown in A among Fig. 1.The distribution of sealed medium pressure is successively decreased to the gland end by the inner shown in B among Fig. 1.The distribution of filler radial compaction power is opposite with the distribution of pressure medium, and inner pressure medium maximum should give big sealing force, and the radial compaction power of filler is minimum herein, so impacting force does not play a role well.
Existing axostylus axostyle seal form just increases the impacting force of filler for obtaining sealability, causes the filler frictional force of gland end very big, often causes axostylus axostyle and filler in the problem that occurs inordinate wear, the increase of operation moment of torsion near the gland end too early.Occur leaking and just need frequently tighten gland bolt, the maintenance workload of daily adjusting is very big.
Summary of the invention
Technical problem to be solved by this invention is exactly to provide a kind of rod seal of falling last item structure for the defective that overcomes above-mentioned prior art existence.
Purpose of the present invention can be achieved through the following technical solutions: a kind of rod seal of falling last item structure, it is characterized in that, comprise axostylus axostyle, end cap, cap, fall gland, filler, double-screw bolt, nut and butterfly spring group, described end cap, cap all is sheathed on the axostylus axostyle, both connect by bolt, the lower surface of described end cap is provided with the groove of a loop, be provided with the bolt hole that connects the end cap upper surface in this groove, the inwall of described cap is provided with the step that a circle is positioned at beneath trenches, it is described that gland is cylindrical, its lower end is provided with the inward flange that a circle extends to axostylus axostyle, the outer surface of its upper end is provided with one and encloses the outward flange that is positioned on the cap step, be provided with the gap between described outward flange and the end cap groove, be provided with tapped hole in this outward flange, be provided with the gap between described gland and the axostylus axostyle, described filler is filled in down in the gap between gland and the axostylus axostyle, the lower end of described double-screw bolt is passed the bolt of cover hole and is connected with the outward flange of falling the gland, described nut is located at the upper end of double-screw bolt, and described butterfly spring is mounted between nut and the end cap.
Be provided with a seal ring between described gland and the cap.
Compared with prior art, compressing of filler of the present invention by falling the tension realization of gland to the end cap side, opposite with prior art filler compaction direction, make the distribution of filler radial compaction power consistent with the distribution of pressure medium, reach the effect that the impacting force distribution is best, reduced axostylus axostyle and filler inordinate wear, the tension of gland is afforded redress by butterfly spring group, has utilized the self sealing action of pressure medium simultaneously, need not frequently tights a bolt compresses filler, has reached the effect that reduces the line service amount.
Description of drawings
Fig. 1 is the prior art constructions schematic representation;
Fig. 2 is a structural representation of the present invention.
Wherein: A is that filler radial compaction power distributes, and B is the sealed medium pressure distribution.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 2, a kind of rod seal of falling last item structure, comprise axostylus axostyle 4, end cap 5, cap 10, fall gland 2, filler 3, double-screw bolt 7, nut 8 and butterfly spring group 6, described end cap 5, cap 10 all is sheathed on the axostylus axostyle 4, both connect by bolt 9, the lower surface of described end cap 5 is provided with the groove of a loop, be provided with the bolt hole that connects the end cap upper surface in this groove, the inwall of described cap 5 is provided with the step that a circle is positioned at beneath trenches, it is described that gland 2 is cylindrical, its lower end is provided with the inward flange that a circle extends to axostylus axostyle, the outer surface of its upper end is provided with one and encloses the outward flange that is positioned on the cap step, be provided with the gap between described outward flange and end cap 5 grooves, be provided with tapped hole in this outward flange, be provided with the gap between described gland 2 and the axostylus axostyle 4, described filler 3 is filled in down in the gap between gland 2 and the axostylus axostyle 4, the lower end of described double-screw bolt 7 pass end cap 5 bolts hole and with fall gland 2 outward flanges and be connected, described nut 8 is located at the upper end of double-screw bolt 7, and described butterfly spring group 6 is located between nut 8 and the end cap 10.
Be provided with a seal ring 1 between described gland 2 and the cap 5.
The gland 2 that falls is a cylindrical shape, and endoporus has flange, and outer wall has the flange that has tapped hole.End cap 5 is flat plectane, and central authorities form mesopore with axostylus axostyle 4, and the bottom has annular ditch groove, and has bolt hole.Filler 3 is installed in down gland 2 and 4 of axostylus axostyles form in the Stuffing box, and the gland 2 that falls is installed in the step hole of cap 10, and has seal ring 1 to form static seal.End cap 5 is fixed on the cap 10 by bolt 9, and filler 3, the gland 2 that falls are remained in the step hole of cap 10.Double-screw bolt 7 passes end cap 5, and the lower end is screwed in down on the gland 2, and the upper end nut is equipped with many group butterfly springs 6 for 8 times.The bottom groove of the top of gland 2 and end cap 5 is gapped, can strain to end cap 5 sides falling gland 2 behind the fastening nut 8, fall the endoporus flange of gland 2 with filler 3 to end cap 5 side compressions, pressure medium acts on down gland at 2 the end simultaneously, further compressible filler 3, generation radial compaction power make filler 3 be close to axostylus axostyle 4 surfaces and stop medium to leak outside.
Compressing of filler 3 by falling the tension realization of gland 2 to end cap 5 sides, opposite with prior art filler compaction direction, the distribution of filler radial compaction power, pressure medium as shown in figure 12, both distributions are consistent, reach the impacting force effect best, that reduced axostylus axostyle 4 and filler 3 inordinate wears that distributes.The tension of gland 2 is afforded redress by butterfly spring group 6, has utilized the self sealing action of pressure medium simultaneously, and need not frequently tights a bolt compresses filler, has reached the effect that reduces the line service amount.
Claims (2)
1. the rod seal of falling last item structure, it is characterized in that, comprise axostylus axostyle, end cap, cap, fall gland, filler, double-screw bolt, nut and butterfly spring group, described end cap, cap all is sheathed on the axostylus axostyle, both connect by bolt, the lower surface of described end cap is provided with the groove of a loop, be provided with the bolt hole that connects the end cap upper surface in this groove, the inwall of described cap is provided with the step that a circle is positioned at beneath trenches, it is described that gland is cylindrical, its lower end is provided with the inward flange that a circle extends to axostylus axostyle, the outer surface of its upper end is provided with one and encloses the outward flange that is positioned on the cap step, be provided with the gap between described outward flange and the end cap groove, be provided with tapped hole in this outward flange, be provided with the gap between described gland and the axostylus axostyle, described filler is filled in down in the gap between gland and the axostylus axostyle, the lower end of described double-screw bolt is passed the bolt of cover hole and is connected with the outward flange of falling the gland, and described nut is located at the upper end of double-screw bolt, and described butterfly spring is mounted between nut and the end cap.
2. a kind of rod seal of falling last item structure according to claim 1 is characterized in that, is provided with a seal ring between described gland and the cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101959429A CN102022539A (en) | 2009-09-18 | 2009-09-18 | Inverse pressing shaft rod sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101959429A CN102022539A (en) | 2009-09-18 | 2009-09-18 | Inverse pressing shaft rod sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102022539A true CN102022539A (en) | 2011-04-20 |
Family
ID=43864166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101959429A Pending CN102022539A (en) | 2009-09-18 | 2009-09-18 | Inverse pressing shaft rod sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102022539A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305292A (en) * | 2011-06-10 | 2012-01-04 | 张家港市兰航机械有限公司 | Shaft sealing device |
| CN105134960A (en) * | 2015-10-15 | 2015-12-09 | 刘卫东 | Packing seal |
| CN105318096A (en) * | 2015-12-09 | 2016-02-10 | 王欣 | Valve rod sealing device |
| CN112243478A (en) * | 2018-06-06 | 2021-01-19 | 芙罗服务管理公司 | Valve assemblies, valve packing assemblies, and associated systems and methods |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4408769A (en) * | 1982-09-21 | 1983-10-11 | Jude Engineering, Inc. | Stuffing box with outer flexible tube to allow shaft gyratory movements |
| US4498681A (en) * | 1984-05-16 | 1985-02-12 | Larry Heinz | Universal seal cage lantern ring with channels and fluid slots |
| US4936592A (en) * | 1987-06-02 | 1990-06-26 | A. Ahlstrom Corporation | Tightening arrangement for packing rings of a packing box |
| CN2158944Y (en) * | 1993-05-03 | 1994-03-16 | 中国石油化工总公司 | Sealing with soft filled composite |
| CN2268153Y (en) * | 1996-11-04 | 1997-11-19 | 江苏白熊机械(集团)公司 | Mainshaft sealing device of mixing machine |
| CN2716600Y (en) * | 2004-06-23 | 2005-08-10 | 江苏南大紫金智能科技有限公司 | Shaft end sealing structure for powder processing equipment |
| CN201507651U (en) * | 2009-09-18 | 2010-06-16 | 上海骐荣机械自控有限公司 | Sealing device for inverted pressing shaft lever |
-
2009
- 2009-09-18 CN CN2009101959429A patent/CN102022539A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4408769A (en) * | 1982-09-21 | 1983-10-11 | Jude Engineering, Inc. | Stuffing box with outer flexible tube to allow shaft gyratory movements |
| US4498681A (en) * | 1984-05-16 | 1985-02-12 | Larry Heinz | Universal seal cage lantern ring with channels and fluid slots |
| US4936592A (en) * | 1987-06-02 | 1990-06-26 | A. Ahlstrom Corporation | Tightening arrangement for packing rings of a packing box |
| CN2158944Y (en) * | 1993-05-03 | 1994-03-16 | 中国石油化工总公司 | Sealing with soft filled composite |
| CN2268153Y (en) * | 1996-11-04 | 1997-11-19 | 江苏白熊机械(集团)公司 | Mainshaft sealing device of mixing machine |
| CN2716600Y (en) * | 2004-06-23 | 2005-08-10 | 江苏南大紫金智能科技有限公司 | Shaft end sealing structure for powder processing equipment |
| CN201507651U (en) * | 2009-09-18 | 2010-06-16 | 上海骐荣机械自控有限公司 | Sealing device for inverted pressing shaft lever |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305292A (en) * | 2011-06-10 | 2012-01-04 | 张家港市兰航机械有限公司 | Shaft sealing device |
| CN105134960A (en) * | 2015-10-15 | 2015-12-09 | 刘卫东 | Packing seal |
| CN105134960B (en) * | 2015-10-15 | 2018-03-20 | 温岭一动机械科技有限公司 | Packing seal |
| CN105318096A (en) * | 2015-12-09 | 2016-02-10 | 王欣 | Valve rod sealing device |
| CN105318096B (en) * | 2015-12-09 | 2018-03-16 | 江苏科维仪表控制工程有限公司 | Valve rod sealing device |
| CN112243478A (en) * | 2018-06-06 | 2021-01-19 | 芙罗服务管理公司 | Valve assemblies, valve packing assemblies, and associated systems and methods |
| CN112243478B (en) * | 2018-06-06 | 2023-11-03 | 芙罗服务管理公司 | Valve assembly, valve packing assembly, and related systems and methods |
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Application publication date: 20110420 |