CN102513964A - Device and method for mounting valve seat - Google Patents
Device and method for mounting valve seat Download PDFInfo
- Publication number
- CN102513964A CN102513964A CN2011103944459A CN201110394445A CN102513964A CN 102513964 A CN102513964 A CN 102513964A CN 2011103944459 A CN2011103944459 A CN 2011103944459A CN 201110394445 A CN201110394445 A CN 201110394445A CN 102513964 A CN102513964 A CN 102513964A
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- valve seat
- pressing plate
- clamp nut
- cylinder cap
- pull bar
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Abstract
The invention discloses a device for mounting a valve seat. The device comprises a pull rod, of which two ends are provided with screw threads, wherein the two ends of the pull rod are provided with a fixing plate and a pressing plate respectively; and a first gland nut and two second gland nuts are arranged on the outer side of each of the fixing plate and the pressing plate, and are used for fixing each of the fixing plate and the pressing plate at each of the two ends of the pull rod. During mounting, the pull rod passes through an air inlet valve hole in a cylinder cover; the nuts and the fixing plate are arranged on the side opposite to the valve seat to fix the pull rod; and the gland nuts and the pressing plate are arranged on the valve seat side to mount the valve seat in a valve seat hole in the cylinder cover in a squeezed manner. The mounting process for the valve seat is simplified greatly, and the mounting time is reduced, so that the valve seat mounting operation is relatively safe; and the device is particularly suitable for mounting the valve seats of air inlet valves of PC26-type cylinder covers.
Description
Technical field
The present invention relates to valve seat mounting technique field, particularly relate to a kind of device of the PC26 of being used for cylinder cap valve seat installation and the method that valve seat is installed thereof.
Background technology
In the installation process of cylinder cap valve seat, need the pressure of stable and continuous could valve seat be expressed in the valve seat orifice of cylinder cap; According to valve seat and valve seat orifice design size, there is the magnitude of interference of 0.175～0.22mm between valve seat and seat hole, need the pressure of about 3.4ton could valve seat be in place through calculating, and finally should fit fully with cylinder cap; Should guarantee valve seat with respect to cylinder cap maintenance level in the process that valve seat is installed, otherwise maybe be in installation process because valve seat run-off the straight and stuck.
In order to satisfy above-mentioned installation requirement, mounting process before requires to utilize manual hydraulic press that the operation of this valve seat is installed.But the structure that is limited to hydraulic press itself need lift cylinder cap on the operating desk of hydraulic press for this valve seat is installed, and has not only increased a large amount of lifting operations, has also increased the danger of operation.According to old process Installation PC26 cylinder cap inlet valve seat, need earlier cylinder cap to be lifted on the hydraulic press workbench, this is the most time consuming step, but obviously this step does not produce actual benefit, and increased danger.Simultaneously, aliging with the hydraulic press top to guarantee inlet valve seat in order to move cylinder cap, is inconvenient equally on workbench.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, a kind of device of valve seat installation and method that valve seat is installed thereof of being used for of deducting a percentage can be accomplished the installation of inlet valve seat under the situation that cylinder cap is not lifted operation, increase the benefit and security.
Technical solution of the present invention is following:
A kind of device that is used for the valve seat installation; Its characteristics are to comprise that two ends have the pull bar of screw thread; Be respectively equipped with fixed head and pressing plate at the two ends of this pull bar, clamp nut be housed respectively, in order to fix said fixed head and pressing plate in the two ends of said pull bar in the outside of said fixed head and pressing plate.
The method of utilizing the described device that is used for the valve seat installation that valve seat is installed, its characteristics are that this method comprises the steps:
1. said fixed head and first clamp nut are installed in an end of pull bar and are wrenched each other;
2. the said pull bar other end planar side and inlet valve seat opposite side from the cylinder cap are penetrated cylinder cap, begin to pack into successively inlet valve seat from this pull bar other end then, the pressing plate and second clamp nut;
3. be wrenched second clamp nut with hand, make each parts card jail each other;
4. use spanner to be wrenched second clamp nut then and in cylinder cap, squeeze into air valve seat, if slight deflection appears in valve seat, then when being wrenched, beat pressing plate gently with copper hammer, the adjustment valve seat makes it with respect to cylinder cap lower plane maintenance level;
5. after valve seat gets into the cylinder cap valve seat orifice basically, firmly be wrenched second clamp nut, valve seat is in place, measure a valve seat and a gap of hole binding face, guarantee that the 0.03mm clearance gauge can't insert this gap.
For guaranteeing that technique scheme is feasible, select all to verify and optimize at the dimensional parameters and the material of pull bar, pressing plate, nut and axial ball bearing.
Described pull bar and pressing plate have the intensity of accomplishing valve seat extruding fitting operation.Material and appearance and size data according to valve seat and cylinder cap; Through checking computations repeatedly; Valve seat needs the pressure of about 2.8～3.5ton in being installed to the process of valve seat orifice; This with manual hydraulic press on the pressure record of the highest 5ton conform to basically, for the reliability that guarantees to design, the design of pull bar considers can guarantee to provide the pulling force of maximum 10ton; Simultaneously wearability and the life-span, adopt 30CrMoA as rod material in order to guarantee instrument.
Because in process of press in, the contact area of valve seat and pressing plate is very little, through only calculating approximately 5cm2; But meanwhile; On so big area, need bear the pressure of about 3.5ton, therefore, the surface of material must must have enough hard and have enough rigidity just passable.From the consideration of cost and material self character, the material of pressing plate has been selected 45 steel for use on selecting, and the thickness of pressure-bearing part edge has selected 16mm as pressure-bearing thickness according to checking computations.
In order to guarantee that pull bar has best trafficability characteristic in the air valve hole, the external diameter of this pull bar of decision design is slightly less than the external diameter of inlet valve spindle, even to guarantee under the mounted situation of cylinder cap air valve guide pin bushing, equally can to use this instrument.The size range of the external diameter of pull bar is set at 23.8～23.9mm.
Because the characteristic of pull bar external diameter and material itself in order to prevent the stressed excessive generation undercut of nut thread in compaction process, is selected M24 * 2 closely-pitched high nuts for use.Nut material is 8.8 grades.
Consider that easy to process and common fine thread root of the tooth has the characteristic of maximum root of the tooth width, common articulation screw thread is adopted in decision.
Axial ball bearing between second clamp nut and the pressing plate increases for the power of reducing friction; Because according to calculating; The moment that frictional force produces in compaction process is bigger, uses axial ball bearing can significantly reduce the resistance that produces owing to frictional force in the process of being wrenched.
Guaranteed symmetric in the configuration design of pull bar; And first clamp nut and second clamp nut of both sides are identical; Thereby exchange both sides parts just can come into operation once more under the excessive situation of the thread abrasion amount of clamp nut side, significantly increase the service life.
Compared with prior art, the present invention adopts thread mechanism, utilizes the design feature of cylinder cap itself, and the mode that promotes pressing plate through thread mechanism is accomplished the installation of inlet valve seat, has following beneficial effect:
1. operation is convenient, saves man-hour.Because this instrument only need be installed on the cylinder cap and just can operate, therefore before operation, only need cylinder cap just be stood up and can accomplish all operations, thereby avoid lifting operation, significantly reduce the operating time, alleviated labour intensity.
2. need not lifting operation, security is good.Because this instrument need not lift cylinder cap and carry out operation on the operating desk, so the complicated operation degree significantly reduces the hazards that possibly exist in having avoided lifting.
Description of drawings
Fig. 1 has demonstrated clamp nut, fixed head, the erection sequence of valve seat and pressing plate.
Fig. 2 is the structural representation that the present invention is used for the device of valve seat installation.
Fig. 3 is the sketch map of the intake valve part of cylinder cap, and wherein the left side is plane on the cylinder cap, and the right side is the cylinder cap lower plane, that is cylinder cap is put into a side of air valve seat.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is used for PC26 type cylinder cap inlet valve seat and installs and do further detailed description, but can not limit protection scope of the present invention with this.
Please consult Fig. 2 earlier, Fig. 2 is the structural representation that the present invention is used for the device of valve seat installation.As shown in the figure; A kind of device that is used for the valve seat installation; Comprise that two ends have the pull bar 1 of screw thread; Be respectively equipped with fixed head 3 and pressing plate 2 at the two ends of this pull bar 1, first clamp nut 4 and second clamp nut 6 be housed respectively, in order to fix said fixed head 3 and pressing plate 2 in the two ends of said pull bar 1 in the outside of said fixed head 3 and pressing plate 2.Between said pressing plate 2 and pressing plate 2 outside clamp nuts 4 axial ball bearing 5 is installed also.The external diameter of pull bar 1 is slightly less than the external diameter of 16PC26 main frame with inlet valve spindle, and the size range of external diameter is 23.8～23.9mm.Said clamp nut 4 adopts M24 * 2 closely-pitched high nuts.Pull bar 1 adopts the 30CrMoA material to process.Pressing plate 2 is to be processed by 45 steel, is 16mm at the thickness of the pressure-bearing part edge of this pressing plate 2.
Fig. 3 is the sketch map of the intake valve part of cylinder cap, and wherein the left side is plane on the cylinder cap, and the right side is the cylinder cap lower plane, that is cylinder cap is put into a side of air valve seat.Can know that by figure the present invention is used for the method for the device installation valve seat of valve seat installation, comprises the steps:
1. an end that earlier the said fixed head 3 and first clamp nut 4 is installed in pull bar 1 also is wrenched each other;
2. said pull bar 1 other end planar side and inlet valve seat opposite side from the cylinder cap are penetrated cylinder cap, then from this pull bar 1 other end begin to pack into successively inlet valve seat, pressing plate 2, axial ball bearing 5 and second clamp nut 6;
5. be wrenched second clamp nut 6 with hand, make each parts card jail each other;
6. use spanner to be wrenched second clamp nut 6 then and in cylinder cap, squeeze into air valve seat, if slight deflection appears in valve seat, then when being wrenched, beat pressing plate 2 gently with copper hammer, the adjustment valve seat makes it with respect to cylinder cap lower plane maintenance level;
7. after valve seat gets into the cylinder cap valve seat orifice basically, firmly be wrenched second clamp nut 6, valve seat is in place, measure a valve seat and a gap of hole binding face, guarantee that the 0.03mm clearance gauge can't insert this gap.
Show through on probation; The present invention is used for the device of valve seat installation can install valve seat by the displace oil press; The mode that promotes pressing plate through thread mechanism is accomplished the installation of inlet valve seat, has significantly simplified the installation of valve seat, has reduced the set-up time; Make the valve seat fitting operation become safer, be specially adapted to the installation of the intake valve valve seat of PC26 type cylinder cap.
Claims (10)
1. one kind is used for the device that valve seat is installed; It is characterized in that comprising that two ends have the pull bar of screw thread (1); Be respectively equipped with fixed head (3) and pressing plate (2) at the two ends of this pull bar (1); In the outside of said fixed head (3) and pressing plate (2) first clamp nut (4) and second clamp nut (6) are housed respectively, in order to fix said fixed head (3) and pressing plate (2) in the two ends of said pull bar (1).
2. the device that is used for the valve seat installation according to claim 1 is characterized in that between said pressing plate (2) and its outside clamp nut (4) axial ball bearing (5) being installed also.
3. the device that is used for the valve seat installation according to claim 1, the external diameter that it is characterized in that said pull bar (1) is less than the external diameter of 16PC26 main frame with inlet valve spindle.
4. according to claim 1ly be used for the device that valve seat is installed, it is characterized in that said pressing plate center opens Ф 26 through holes, the outer ring is opened Ф 107 ± 0.05mm step surface and is used at the installation process fixed valve base.
5. the device that is used for the valve seat installation according to claim 1 is characterized in that said clamp nut (4) is M24 * 2 closely-pitched high nuts.
6. the device that is used for the valve seat installation according to claim 1 is characterized in that said fixed head (3) central through hole is M24 * 2 fine thread through holes.
7. the device that is used for the valve seat installation according to claim 3 is characterized in that the size range of the external diameter of said pull bar is set at 23.8～23.9mm.
8. according to claim 1ly being used for the device that valve seat is installed, it is characterized in that described pressing plate (2) is to be processed by 45 steel, is 16mm at the thickness of the pressure-bearing part edge of this pressing plate (2).
9. the method for utilizing the described device that is used for the valve seat installation of claim 1 that valve seat is installed is characterized in that this method comprises the steps:
1. said fixed head (3) and first clamp nut (4) are installed in an end of pull bar (1) and are wrenched each other;
2. said pull bar (1) other end planar side and inlet valve seat opposite side from the cylinder cap are penetrated cylinder cap, begin to pack into successively inlet valve seat from this pull bar (1) other end then, pressing plate (2) and second clamp nut (4);
3. be wrenched second clamp nut with hand, make each parts card jail each other;
4. use spanner to be wrenched second clamp nut (6) then and in cylinder cap, squeeze into air valve seat, if slight deflection appears in valve seat, then when being wrenched, beat pressing plate (2) gently with copper hammer, the adjustment valve seat makes it with respect to cylinder cap lower plane maintenance level;
5. after valve seat gets into the cylinder cap valve seat orifice basically, firmly be wrenched second clamp nut (6), valve seat is in place, measure a valve seat and a gap of hole binding face, guarantee that the 0.03mm clearance gauge can't insert this gap.
10. the method for utilizing the described device that is used for the valve seat installation of claim 2 that valve seat is installed is characterized in that this method comprises the steps:
1. said fixed head (3) and first clamp nut (4) are installed in an end of pull bar (1) and are wrenched each other;
2. said pull bar (1) other end planar side and inlet valve seat opposite side from the cylinder cap are penetrated cylinder cap, then from this pull bar (1) other end begin to pack into successively inlet valve seat, pressing plate (2), axial ball bearing (5) and second clamp nut (4);
3. be wrenched second clamp nut with hand, make each parts card jail each other;
4. use spanner to be wrenched second clamp nut (6) then and in cylinder cap, squeeze into air valve seat, if slight deflection appears in valve seat, then when being wrenched, beat pressing plate (2) gently with copper hammer, the adjustment valve seat makes it with respect to cylinder cap lower plane maintenance level;
5. after valve seat gets into the cylinder cap valve seat orifice basically, firmly be wrenched second clamp nut (6), valve seat is in place, measure a valve seat and a gap of hole binding face, guarantee that the 0.03mm clearance gauge can't insert this gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103944459A CN102513964A (en) | 2011-12-02 | 2011-12-02 | Device and method for mounting valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103944459A CN102513964A (en) | 2011-12-02 | 2011-12-02 | Device and method for mounting valve seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102513964A true CN102513964A (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103944459A Pending CN102513964A (en) | 2011-12-02 | 2011-12-02 | Device and method for mounting valve seat |
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| CN (1) | CN102513964A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105382756A (en) * | 2015-11-24 | 2016-03-09 | 重庆普什机械有限责任公司 | Device for press fitting of diesel engine valve seat |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4882829A (en) * | 1988-08-23 | 1989-11-28 | Dawe Peter H | Device for accurately positioning and aligning a guide sleeve into a bore of a cylinder head |
| US4907333A (en) * | 1988-08-23 | 1990-03-13 | Dawe Peter H | Device for accurately positioning and aligning a guide sleeve into a bore of a cylinder head |
| CN2425740Y (en) * | 1999-12-18 | 2001-04-04 | 向朝富 | Tool for installing valve stem guide of internal combustion engine |
| CN200960646Y (en) * | 2006-10-27 | 2007-10-17 | 中国南车集团洛阳机车厂 | Detaching tool for diesel engine air valve base |
| CN101362320A (en) * | 2008-09-23 | 2009-02-11 | 中国石油集团川庆钻探工程有限公司 | Mounting or dismounting tools for valve plate and valve seat of gate valve |
| CN101927473A (en) * | 2010-07-30 | 2010-12-29 | 金湖金石阀业有限公司 | Valve seat assembling tool for valve |
| CN201792171U (en) * | 2010-09-18 | 2011-04-13 | 中国有色(沈阳)泵业有限公司 | Tool for mounting valve seat of straight through type feed valve in diaphragm pump |
-
2011
- 2011-12-02 CN CN2011103944459A patent/CN102513964A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4882829A (en) * | 1988-08-23 | 1989-11-28 | Dawe Peter H | Device for accurately positioning and aligning a guide sleeve into a bore of a cylinder head |
| US4907333A (en) * | 1988-08-23 | 1990-03-13 | Dawe Peter H | Device for accurately positioning and aligning a guide sleeve into a bore of a cylinder head |
| CN2425740Y (en) * | 1999-12-18 | 2001-04-04 | 向朝富 | Tool for installing valve stem guide of internal combustion engine |
| CN200960646Y (en) * | 2006-10-27 | 2007-10-17 | 中国南车集团洛阳机车厂 | Detaching tool for diesel engine air valve base |
| CN101362320A (en) * | 2008-09-23 | 2009-02-11 | 中国石油集团川庆钻探工程有限公司 | Mounting or dismounting tools for valve plate and valve seat of gate valve |
| CN101927473A (en) * | 2010-07-30 | 2010-12-29 | 金湖金石阀业有限公司 | Valve seat assembling tool for valve |
| CN201792171U (en) * | 2010-09-18 | 2011-04-13 | 中国有色(沈阳)泵业有限公司 | Tool for mounting valve seat of straight through type feed valve in diaphragm pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105382756A (en) * | 2015-11-24 | 2016-03-09 | 重庆普什机械有限责任公司 | Device for press fitting of diesel engine valve seat |
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Application publication date: 20120627 |