CN202336931U - Oil-free shaft end sealing structure of concrete stirrer - Google Patents
Oil-free shaft end sealing structure of concrete stirrer Download PDFInfo
- Publication number
- CN202336931U CN202336931U CN2011205274654U CN201120527465U CN202336931U CN 202336931 U CN202336931 U CN 202336931U CN 2011205274654 U CN2011205274654 U CN 2011205274654U CN 201120527465 U CN201120527465 U CN 201120527465U CN 202336931 U CN202336931 U CN 202336931U
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- cylindrical shell
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Abstract
The utility model discloses an oil-free shaft end sealing structure of a concrete stirrer. The structure comprises a stirring barrel and a stirring shaft, wherein the shaft head of the stirring shaft extends from the inside to the outside of the stirring barrel; a dynamic sealing ring sleeved on the stirring shaft is arranged at the part of the stirring shaft located on the inner side of the stirring barrel; a static sealing ring sleeved on the stirring shaft is arranged on the stirring cylinder; the dynamic sealing ring and the static sealing ring are compacted by a spring, which is arranged on the stirring cylinder or stirring shaft and stretches and retracts in the axial direction of the stirring shaft, so as to form sealing contact between the end surface of the dynamic sealing ring and the end surface of the static sealing ring; and the end surfaces in sealing contact of the dynamic sealing ring and the static sealing ring are both located on the inner side of the stirring cylinder. According to the utility model, under the thrust of the spring, the two sealing rings are always in close contact so as to keep good tightness.
Description
Technical field
The utility model relates to a kind of concrete mixer shaft end seal structure.
Background technology
Concrete mixer (hereinafter to be referred as mixer) is that concrete mixes the indispensable equipment that stirs, and wherein the axle horizontal type concrete mixer is that domestic and international application is the most extensive, the mixing plant that use amount is maximum.It has that mixing quality is good, production efficiency is high, advanced in performance, use advantages such as reliable.But axle horizontal type mixer shaft and axle head are embedded in the concrete at work always, thus the reliability of shaft end seal and service life be a key issue of axle horizontal type mixer always, also be the insoluble always technical barrier of mixer industry.
The shaft end seal of axle horizontal type mixer all is to seal through lubricant grease both at home and abroad now; Promptly squeeze into lubricant grease in the axle head with dense oil pump; In axle head, form certain pressure, and constantly squeeze into grease in the stirring cylindrical shell, get into axle head to stop mortar through certain sealing ring.Though this Sealing Technology can play sealing function, exist following shortcoming:
1. sealing reliability is not high, the spillage time generally from the some months to a year and a half in.
2. oil pump and oil pipe are had relatively high expectations, just have influence on shaft end seal in case oil pump and oil pipe go wrong.
3. complex structure is made assembling and is keeped in repair all difficulty.
4. cost of use is high, every annual need of mixer with more than the lubricant grease 10000L, and expense is about 1.5 ten thousand yuan.
5. it is unfavorable to concrete strength to squeeze into concrete to grease.
Summary of the invention
The problem that the utility model will solve is: provide a kind of concrete mixer of good airproof performance not have oily sealing structure of shaft end.
For addressing the above problem; The utility model comprises stirring cylindrical shell and shaft; To reach mixing drum in the cylindrical shell external from stirring for the spindle nose of shaft; The part that is positioned at the inboard of mixing drum body on the shaft is provided with the rotary packing ring that is enclosed within on the shaft; Stir cylindrical shell and be provided with the stationary seal ring that is enclosed within on the shaft, rotary packing ring and stationary seal ring contact with the stationary seal ring end face seal by being arranged on the end face that the spring compression at the axial stretching of shaft that stirs on cylindrical shell or the shaft forms rotary packing ring, and the end face that rotary packing ring contacts with the sealing of stationary seal ring all is positioned at stirring cylindrical shell inboard.
In order to improve the service life of rotary packing ring and stationary seal ring, it is the above carbide alloy of HRA85 that described rotary packing ring and stationary seal ring adopt hardness.Adopt the Hardmetal materials of hard high-wearing feature, than the sealing ring wearability and ten times of the life-span raisings of general material.Therefore do not need oilyly, can guarantee good sealing property and the service life of quite growing yet.
For the ease of installing; Described rotary packing ring is fixed on the rotating ring seal receptacle; The rotating ring seal receptacle is fixed through key and shaft, and described stationary seal ring is fixed on the stationary ring seal receptacle, and the outer end of described spring is connected with the stirring cylindrical shell; The inner of spring is connected with the stationary ring seal receptacle, and the end face that rotary packing ring contacts with the sealing of stationary seal ring is the plane.
In order stationary seal ring to be endwisely slipped flexibly and can not to rotate; The upper inboard in the shaft installing port of described stirring cylindrical shell is fixed with fairlead; Stir the upper outside in the shaft installing port of cylindrical shell and be fixed with the spindle nose shell, be fixed with spring base on the spindle nose shell, the outer end of spring is fixed on the spring base; The stationary ring seal receptacle is in the fairlead, and fairlead is provided with the stop pin that prevents that the stationary ring seal receptacle from rotating.
For the ease of regulating the position of rotary packing ring; Be suitable for the shaft and the installation of stirring cylindrical shell of different size; Be fixed with on the described shaft and be positioned at the inboard back-up ring of rotating ring seal receptacle; Being threaded on the back-up ring withstands on the screw on the rotating ring seal receptacle inner side end, and described key is the dive key in the axial setting of shaft.
The beneficial effect of the utility model: the utility model forms both ends of the surface sealing contact through two sealing rings by spring compression, because the promotion of spring is arranged, two sealing rings is close together; Remain good sealing property; This dry seal compare with existing Sealing Technology main innovate point be broken existing shaft end seal must use oil-tightening pattern, realized dry seal, sealing reliability and life-span are significantly improved; And it is simple in structure; It is simple to make the working service maintenance, uses manpower and material resources sparingly, and accomplishes energy-conserving and environment-protective.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Among the figure: 1, shaft, 2, dive key, 3, back-up ring, 4, the rotating ring seal receptacle, 5, steady pin; 6, rotary packing ring, 7, stationary seal ring, 8, fairlead, 9, stir cylindrical shell, 10, the stationary ring seal receptacle; 11, spring, 12, spring base, 13, the spindle nose shell, 14, stop pin, 15, screw.
The specific embodiment
A kind of specific embodiment as shown in Figure 1, it comprises stirs cylindrical shell 9 and shaft 1, and the spindle nose of shaft 1 stirs outside the cylindrical shell 9 from stirring to reach in the cylindrical shell 9.
Stir the inboard that is positioned at the shaft installing port on the cylindrical shell 9 and be fixed with fairlead 8; Stir the outside that is positioned at the shaft installing port on the cylindrical shell 9 and be fixed with spindle nose shell 13; Be fixed with spring base 12 in the spindle nose shell 13, be provided with stationary ring seal receptacle 10 in the fairlead 8, be connected with spring 11 between stationary ring seal receptacle 10 and the spring base 12; Spring 11 1 ends and stationary ring seal receptacle 10 are fixing, and the other end and spring base 12 are fixing.The inboard of stationary ring seal receptacle 10 is fixed with stationary seal ring 7.Fairlead 8 is provided with the stop pin 14 that prevents that stationary ring seal receptacle 10 from rotating.Stationary ring seal receptacle 10 is provided with axial elongated slot, and stop pin 14 is threaded with fairlead 8, and the termination of stop pin 14 is inserted in the elongated slot of stationary ring seal receptacle 10.
On the part of the inboard that is positioned at mixing drum body 9 on the shaft 1, be provided with back-up ring 3 and rotating ring seal receptacle 4; Back-up ring 3 is positioned at the inboard of rotating ring seal receptacle 4; Back-up ring 3 is fixed on the shaft 1; Rotating ring seal receptacle 4 is connected through axial dive key 2 with shaft 1, is threaded on the back-up ring 3 to withstand on the screw 15 on rotating ring seal receptacle 4 inner side ends.The outer end of rotating ring seal receptacle 4 is fixed with rotary packing ring 6 through steady pin 5, and rotary packing ring 6 outside end faces contact with the inner side end sealing of stationary seal ring 7.The end face that rotary packing ring 6 contacts with the sealing of stationary seal ring 7 is the plane and is positioned at and stirs cylindrical shell 9 inboards.
Stationary seal ring 7 is promoted by spring 11, can on shaft 1, slide.Rotary packing ring 6 rotates with shaft 1, promotes to make rotary packing ring 6 and stationary seal ring 7 to compress through spring 11.Rotary packing ring 6 and stationary seal ring 7 plane contact, fitting closely stops mortar inner through the axle head that rotary packing ring 6 and stationary seal ring 7 binding faces get into shaft 1, realizes the sealing of shaft 1.
It is the above carbide alloy of HRA85 that rotary packing ring 6 adopts hardness with stationary seal ring 7.Carbide alloy generally is used for cutter and high life mould, and its hardness can reach more than the HRA85, can not be out of shape and reduce hardness at 800 ℃.Therefore the self-lubricating hard alloy is adapted at working under few lubricant grease or the unlubricated grease condition.
Moreover from the working condition of mixer; Agitator shaft speed is generally at 20-35r/min; The linear velocity of sealing ring has only 0.2-0.3m/s; The relative velocity of two sealing rings is less, so fricative wearing and tearing of two sealing rings and temperature rise are all very little, says that therefore it is feasible and reliable on agitator shaft end seal, adopting the dry seal of hard alloy seal ring.
For reliability and the service life of verifying the agitator shaft end dry seal, we have carried out simulated test, have designed and produced a concrete mixer simulation test machine, and its operating mode and mixer are basic identical.The testing machine agitator shaft speed is 53.6r/min, and is more fast again than mixer rotating speed, stirs material and is sand and add water and reach certain denseness, tests by the running time of mixer a year and a half.Since continuously running on May 21st, 2011 to June 26, moved 754 hours altogether, shut down then shaft end seal taken apart and check; Two ring wear amounts are merely 0.5mm; And wearing and tearing are evenly level and smooth, and axle head does not have the spillage phenomenon, do not have basically in the axle head and into starch phenomenon; The temperature rise of shaft end seal place is in 30 ℃, and is similar with bearing temperature rise.Also be used for having carried out on the mixer actual tests to dry seal simultaneously, moved five months so far from July 1st, 2011, shaft end seal is normal, no abnormal phenomenon.
Claims (5)
1. a concrete mixer does not have oily sealing structure of shaft end; Comprise and stir cylindrical shell and shaft; To reach mixing drum in the cylindrical shell external from stirring for the spindle nose of shaft; It is characterized in that: the part that is positioned at the inboard of mixing drum body on the shaft is provided with the rotary packing ring that is enclosed within on the shaft; Stir cylindrical shell and be provided with the stationary seal ring that is enclosed within on the shaft, rotary packing ring and stationary seal ring contact with the stationary seal ring end face seal by being arranged on the end face that the spring compression at the axial stretching of shaft that stirs on cylindrical shell or the shaft forms rotary packing ring, and the end face that rotary packing ring contacts with the sealing of stationary seal ring all is positioned at stirring cylindrical shell inboard.
2. concrete mixer according to claim 1 does not have oily sealing structure of shaft end, it is characterized in that: it is the above carbide alloy of HRA85 that described rotary packing ring and stationary seal ring adopt hardness.
3. concrete mixer according to claim 1 and 2 does not have oily sealing structure of shaft end; It is characterized in that: described rotary packing ring is fixed on the rotating ring seal receptacle; The rotating ring seal receptacle is fixed through key and shaft, and described stationary seal ring is fixed on the stationary ring seal receptacle, and the outer end of described spring is connected with the stirring cylindrical shell; The inner of spring is connected with the stationary ring seal receptacle, and the end face that rotary packing ring contacts with the sealing of stationary seal ring is the plane.
4. concrete mixer according to claim 3 does not have oily sealing structure of shaft end; It is characterized in that: the upper inboard in the shaft installing port of described stirring cylindrical shell is fixed with fairlead; Stir the upper outside in the shaft installing port of cylindrical shell and be fixed with the spindle nose shell, be fixed with spring base on the spindle nose shell, the outer end of spring is fixed on the spring base; The stationary ring seal receptacle is in the fairlead, and fairlead is provided with the stop pin that prevents that the stationary ring seal receptacle from rotating.
5. concrete mixer according to claim 3 does not have oily sealing structure of shaft end; It is characterized in that: be fixed with the back-up ring that is positioned at rotating ring seal receptacle inboard on the described shaft; Being threaded on the back-up ring withstands on the screw on the rotating ring seal receptacle inner side end, and described key is the dive key in the axial setting of shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205274654U CN202336931U (en) | 2011-12-16 | 2011-12-16 | Oil-free shaft end sealing structure of concrete stirrer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205274654U CN202336931U (en) | 2011-12-16 | 2011-12-16 | Oil-free shaft end sealing structure of concrete stirrer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202336931U true CN202336931U (en) | 2012-07-18 |
Family
ID=46485635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205274654U Expired - Lifetime CN202336931U (en) | 2011-12-16 | 2011-12-16 | Oil-free shaft end sealing structure of concrete stirrer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202336931U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102398306A (en) * | 2011-12-16 | 2012-04-04 | 山东米科思机械设备有限公司 | Oil-free shaft end sealing structure of concrete mixer |
| CN103465369A (en) * | 2013-09-13 | 2013-12-25 | 三一汽车制造有限公司 | Mixing drum sealing device and mixing transport cart |
| CN104847900A (en) * | 2015-05-08 | 2015-08-19 | 西安德通振动搅拌技术有限公司 | Mixer shaft end sealing device |
| CN105202197A (en) * | 2015-10-16 | 2015-12-30 | 长安大学 | Gas seal structure and gas seal method of vibratory mixer |
| CN110568799A (en) * | 2019-09-29 | 2019-12-13 | 山东米科思机械设备有限公司 | Intelligent oiling circuit board of oil-free sealing stirrer |
-
2011
- 2011-12-16 CN CN2011205274654U patent/CN202336931U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102398306A (en) * | 2011-12-16 | 2012-04-04 | 山东米科思机械设备有限公司 | Oil-free shaft end sealing structure of concrete mixer |
| CN103465369A (en) * | 2013-09-13 | 2013-12-25 | 三一汽车制造有限公司 | Mixing drum sealing device and mixing transport cart |
| CN104847900A (en) * | 2015-05-08 | 2015-08-19 | 西安德通振动搅拌技术有限公司 | Mixer shaft end sealing device |
| CN105202197A (en) * | 2015-10-16 | 2015-12-30 | 长安大学 | Gas seal structure and gas seal method of vibratory mixer |
| CN110568799A (en) * | 2019-09-29 | 2019-12-13 | 山东米科思机械设备有限公司 | Intelligent oiling circuit board of oil-free sealing stirrer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120718 |
|
| CX01 | Expiry of patent term |