CN201507652U - Floating seal structure of thrust shaft lever - Google Patents

Floating seal structure of thrust shaft lever Download PDF

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Publication number
CN201507652U
CN201507652U CN 200920210156 CN200920210156U CN201507652U CN 201507652 U CN201507652 U CN 201507652U CN 200920210156 CN200920210156 CN 200920210156 CN 200920210156 U CN200920210156 U CN 200920210156U CN 201507652 U CN201507652 U CN 201507652U
Authority
CN
China
Prior art keywords
ball
axostylus axostyle
seal ring
seal
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN 200920210156
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Chinese (zh)
Inventor
韩安伟
李政宏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GUANLONG VALVE MACHINERY CO Ltd SHANGHAI
SHANGHAI QIRONG MACHINERY AUTOMATIC CONTROL CO Ltd
Original Assignee
GUANLONG VALVE MACHINERY CO Ltd SHANGHAI
SHANGHAI QIRONG MACHINERY AUTOMATIC CONTROL CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GUANLONG VALVE MACHINERY CO Ltd SHANGHAI, SHANGHAI QIRONG MACHINERY AUTOMATIC CONTROL CO Ltd filed Critical GUANLONG VALVE MACHINERY CO Ltd SHANGHAI
Priority to CN 200920210156 priority Critical patent/CN201507652U/en
Application granted granted Critical
Publication of CN201507652U publication Critical patent/CN201507652U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a floating seal structure of a thrust shaft lever, comprising a first sealed ring, a second sealed ring, a third sealed ring, a fourth sealed ring, a shaft lever, a bolt, a press cap, a first ball ring, a second ball ring and a valve cover, the first ball ring and the second ball ring are middle cylindrical holes, the bottom of the hole in the valve cover is a spherical face connected to the surface of the first ball ring, the upper portion of valve cover is a cylindrical hole, the press cap is in the circular disk shape, an upper flange of the press cap is fixed on the valve cover by a bolt, the hollow bottom of the press cap is a spherical face connected to the surface of the second ball ring, the shaft lever is a cylindrical lever with a shaft shoulder in the middle, the shaft shoulder of the shaft lever is clamped between the first ball ring and the second ball ring. Compared with the prior art, the utility model has the advantages of good sealability, long service life and the like.

Description

A kind of floating sealing structure of thrust axostylus axostyle
Technical field
The utility model relates to a kind of sealing configuration, especially relates to a kind of floating sealing structure of thrust axostylus axostyle.
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, and axostylus axostyle has bigger vibration and beat during work, causes the axostylus axostyle axis not overlap with rotating center, makes the excessive throw of eccentric of generation between them, the problem of seal leakage, life-span reduction occurs.The valve rod of inside screw non-rising stem type gate valve particularly, the axial force in the time of also will bearing opening/shutting valve at the sealing position, complex structure, boundary dimension is bigger.Therefore seal impacting force simultaneously and be created in axostylus axostyle radially, behind axostylus axostyle and sealing part abrasion, be easy to leakage rate, make to add and require man-hour radial accuracy very high, cost is higher.When taking place to leak in the using process, must frequently tighten gland bolt, the maintenance workload of daily adjusting is very big.The filler impacting force is big, also causes operating the increase of moment of torsion, is unfavorable for saving the required energy consumption of drive unit.
Summary of the invention
The purpose of this utility model is exactly the floating sealing structure that a kind of thrust axostylus axostyle is provided for the defective that overcomes above-mentioned prior art existence.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of floating sealing structure of thrust axostylus axostyle, it is characterized in that, this structure comprises first seal ring, second seal ring, the 3rd seal ring, the 4th seal ring, axostylus axostyle, bolt, gland, first ball, second ball, valve gap, described first ball, second ball is the intermediate cylindrical hole, described valve gap mesopore bottom is the sphere that is connected with the first ball sphere, described valve gap top is cylindrical hole, described gland is a disc, the upper flange of described gland is by being bolted on the valve gap, described gland hollow base is the sphere that is connected with the second ball sphere, described axostylus axostyle is the cylindrical bar of middle tape spool shoulder, and the shaft shoulder of described axostylus axostyle is sandwiched in first ball, between second ball.
Described first seal ring is an O type rubber seal, between first ball and valve gap.
Described second seal ring is an O type rubber seal, between first ball and the shaft shoulder.
Described the 3rd seal ring is an O type rubber seal, between second ball and the shaft shoulder.
Described the 4th seal ring is 0 type rubber seal, between second ball and gland.
Described first ball, second ball and axostylus axostyle cylindrical are provided with the gap.
Compared with prior art, the utlity model has following advantage:
1, the sealing of axostylus axostyle is mainly realized by seal ring, and O shape rubber seal has the pressure self sealing action, need not extra sealing impacting force, has reached to reduce the valve operation moment of torsion, exempt regular maintenance, dwindle the effect of physical dimension.
2, the easy leakage of axostylus axostyle and valve cover chamber is sealing at the motion surface of contact, with the sealing that axostylus axostyle shaft shoulder end face forms, has solved the problem that the radial seal machining accuracy increases manufacture cost by first ball, second ball.
3, the vibration of axostylus axostyle and beat are absorbed by spherical joint, and the work of seal ring is not subjected to the influence of axostylus axostyle vibration and beat, reaches the effect of avoiding seal leakage, increasing the service life.
Description of drawings
Fig. 1 is the structural representation of floating sealing structure when proper functioning of a kind of thrust axostylus axostyle of the utility model;
Fig. 2 is the structural representation of floating sealing structure when off-centre is worked of a kind of thrust axostylus axostyle of the utility model;
Fig. 3 is the structural representation of floating sealing structure when swing work of a kind of thrust axostylus axostyle of the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Embodiment
As shown in Figure 1, a kind of floating sealing structure of thrust axostylus axostyle comprises first seal ring 1, second seal ring 2, the 3rd seal ring 3, the 4th seal ring 4, axostylus axostyle 5, bolt 6, gland 7, first ball 10, second ball 8, valve gap 11.Described first ball 10, second ball 8 are the intermediate cylindrical hole, and outer wall surface is the part of sphere.Described valve gap 11 mesopores bottom is a sphere, cooperates with the sphere of first ball 10, and top is cylindrical hole.Described gland 7 is a disc, and upper flange is fixed on the valve gap 11 with bolt 6, and the mesopore bottom is a sphere, cooperates with the sphere of second ball 8.Described axostylus axostyle 5 is the cylindrical bar of middle tape spool shoulder 9, up and down axial force when the shaft shoulder 9 is used to bear opening/shutting valve.First ball 10, second ball 8 are clipped together 9 pairs of the shaft shoulders of axostylus axostyle 5, and forming one can be along the joint alive of centre of sphere swing.The gap 12 of first ball 10, second ball 8 and axostylus axostyle 5 cylindricals is bigger.
As shown in Figure 1, when proper functioning, the sealing of axostylus axostyle 5 is realized by seal ring that mainly described first seal ring 1, second seal ring 2, the 3rd seal ring 3, the 4th seal ring 4 are O shape rubber seal.O shape rubber seal has the pressure self sealing action, need not extra sealing impacting force, has reached to reduce the valve operation moment of torsion, exempt regular maintenance, dwindle the effect of physical dimension.The easy leakage that axostylus axostyle 5 and valve gap are 11 be sealing at the motion surface of contact, with the sealing that axostylus axostyle 5 shaft shoulders 9 end faces form, solved the problem that the radial seal machining accuracy increases manufacture cost by first ball 10, second ball 8.
When axostylus axostyle 5 was subjected to downward axial force, axial force was delivered on the valve gap 11 by first ball 10, and what started seal action this moment mainly is that second seal ring, 2, the first seal rings 1, first ball 10 and 11 of valve gaps form static seal.When axostylus axostyle 5 is subjected to upwards axial force, axial force is delivered on the gland 7 by second ball 8, be delivered on the valve gap 11 by bolt 6, what started seal action this moment mainly is that the 3rd seal ring 3, the four seal rings 4, second ball 8 and 7 on gland form static seal again.Even the shaft shoulder 9 upper and lower end faces of axostylus axostyle 5 have produced wearing and tearing with the end face that contacts of first ball 10, second ball 8 and since wear direction and axostylus axostyle 5 be subjected to force direction consistent, so can compensate automatically, do not influence sealing.
As shown in Figure 2, when off-centre is worked,, allow the axostylus axostyle 5 axis runout centre ofs sphere to offset 13 because the gap 12 of first ball 10, second ball 8 and axostylus axostyle 5 cylindricals is bigger.The seal compression direction of the direction of the axostylus axostyle 5 axis runout centre ofs sphere and first seal ring 1, the 4th seal ring 4 is orthogonal at this moment, first seal ring 1 that first ball 10, second ball 8 and gland are 7, the static seal that the 4th seal ring 4 forms are unaffected, the leakage of sealing when having avoided work eccentric.
As shown in Figure 3, when swing work,, form one and can allow angle of oscillation 14 along the joint alive of centre of sphere swing owing to first ball 10, second ball 8 are clipped together 9 pairs of the shaft shoulders of axostylus axostyle 5.First ball 10, second ball 8 are being followed the sealing that axostylus axostyle 5 shaft shoulders 9 end faces form axostylus axostyle 5 and are being swung together at this moment, and the seal compression of second seal ring 2, the 3rd seal ring 3 is not subjected to the influence of work swing.First ball 10, second ball 8 and 7 on gland contact sphere generation trace movement, but the gap do not change, therefore first seal ring 1, the 4th seal ring 4 seal compression are unaffected,, the leakage of sealing when having avoided the work swing.
Under above-mentioned back two kinds of working conditions, the vibration and the beat of axostylus axostyle 5 are absorbed by spherical joint, and the work of seal ring is not subjected to the influence of axostylus axostyle 5 vibrations and beat, reaches the effect of avoiding seal leakage, increasing the service life.

Claims (6)

1. the floating sealing structure of a thrust axostylus axostyle, it is characterized in that, this structure comprises first seal ring, second seal ring, the 3rd seal ring, the 4th seal ring, axostylus axostyle, bolt, gland, first ball, second ball, valve gap, described first ball, second ball is the intermediate cylindrical hole, described valve gap mesopore bottom is the sphere that is connected with the first ball sphere, described valve gap top is cylindrical hole, described gland is a disc, the upper flange of described gland is by being bolted on the valve gap, described gland hollow base is the sphere that is connected with the second ball sphere, described axostylus axostyle is the cylindrical bar of middle tape spool shoulder, and the shaft shoulder of described axostylus axostyle is sandwiched in first ball, between second ball.
2. the floating sealing structure of a kind of thrust axostylus axostyle according to claim 1 is characterized in that, described first seal ring is an O type rubber seal, between first ball and valve gap.
3. the floating sealing structure of a kind of thrust axostylus axostyle according to claim 1 is characterized in that, described second seal ring is an O type rubber seal, between first ball and the shaft shoulder.
4. the floating sealing structure of a kind of thrust axostylus axostyle according to claim 1 is characterized in that, described the 3rd seal ring is an O type rubber seal, between second ball and the shaft shoulder.
5. the floating sealing structure of a kind of thrust axostylus axostyle according to claim 1 is characterized in that, described the 4th seal ring is an O type rubber seal, between second ball and gland.
6. the floating sealing structure of a kind of thrust axostylus axostyle according to claim 1 is characterized in that, described first ball, second ball and axostylus axostyle cylindrical are provided with the gap.
CN 200920210156 2009-09-25 2009-09-25 Floating seal structure of thrust shaft lever Expired - Lifetime CN201507652U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200920210156 CN201507652U (en) 2009-09-25 2009-09-25 Floating seal structure of thrust shaft lever

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200920210156 CN201507652U (en) 2009-09-25 2009-09-25 Floating seal structure of thrust shaft lever

Publications (1)

Publication Number Publication Date
CN201507652U true CN201507652U (en) 2010-06-16

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Country Status (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102032345A (en) * 2009-09-25 2011-04-27 上海冠龙阀门机械有限公司 Floating sealing structure of thrust shaft rod
CN102174963A (en) * 2011-02-25 2011-09-07 西华大学 Spherical mechanical sealing device
CN102518808A (en) * 2011-12-28 2012-06-27 浙江鸿友压缩机制造有限公司 Floating type shaft seal structure
CN105822764A (en) * 2016-05-19 2016-08-03 龙工(上海)精工液压有限公司 Sealing structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102032345A (en) * 2009-09-25 2011-04-27 上海冠龙阀门机械有限公司 Floating sealing structure of thrust shaft rod
CN102174963A (en) * 2011-02-25 2011-09-07 西华大学 Spherical mechanical sealing device
CN102518808A (en) * 2011-12-28 2012-06-27 浙江鸿友压缩机制造有限公司 Floating type shaft seal structure
CN102518808B (en) * 2011-12-28 2015-02-18 浙江鸿友压缩机制造有限公司 Floating type shaft seal structure
CN105822764A (en) * 2016-05-19 2016-08-03 龙工(上海)精工液压有限公司 Sealing structure

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CX01 Expiry of patent term

Granted publication date: 20100616