CN203223555U - Sealing structure of shaft end of concrete mixer - Google Patents
Sealing structure of shaft end of concrete mixer Download PDFInfo
- Publication number
- CN203223555U CN203223555U CN 201220747823 CN201220747823U CN203223555U CN 203223555 U CN203223555 U CN 203223555U CN 201220747823 CN201220747823 CN 201220747823 CN 201220747823 U CN201220747823 U CN 201220747823U CN 203223555 U CN203223555 U CN 203223555U
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- China
- Prior art keywords
- spindle nose
- stirrer
- shell
- guard circle
- shaft head
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- Expired - Fee Related
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Abstract
The utility model discloses the sealing structure of the shaft end of a concrete mixer, which comprises a second shaft head guard ring fixed on the spindle of a mixer. The second shaft head guard ring is provided with a side wall spacing collar. A grooved type labyrinth sealing cavity is formed between the side wall spacing collar and a first shaft head guard ring. The spindle of the mixer is provided with a shaft head reinforcing plate. The shaft head reinforcing plate is fixedly provided with a shaft head shell. The shaft head shell is provided with a second oil filling hole. A yellow-glue locking steel frame is arranged between the shaft head shell and the first shaft head guard ring. The yellow-glue locking steel frame is provided with a yellow-glue seal ring. A first floating seal ring and a second floating seal ring are sequentially arranged on the spindle of the mixer from inside to outside. A sealing ring is respectively arranged between the first floating seal ring and the main body of a shaft locking unit, and between the second floating seal ring and a shaft head end cap. The spindle of the mixer is also provided with a skeleton seal ring positioned inside the shaft head end cap. According to the technical scheme of the utility model, by means of a plurality of sealing mechanisms, the cement mortar is prevented from entering the shaft end and the lubricating oil is prevented from leaking to the outside. Therefore, the sealing structure of the shaft end of the concrete mixer is good in sealing effect and the sealing reliability of the shaft end is also improved.
Description
Technical field
The utility model relates to a kind of seal arrangement, especially relates to a kind of concrete mixer shaft end seal structure.
Background technique
Double-horizontal axle concrete-mixer is that a kind of aggregate with cement, various gratings (stone, sandstone) and water drop in the stirring cylindrical shell by certain design mixture proportion requirement, drive unit make the blade on two stirring shafts of horizontal arrangement in stirring cylindrical shell realize to mixture shearing, extruding, roll and dish out etc. and force stirring action, mixture is evenly stirred in violent relative movement.In whipping process, just advance, seamlessly do not go into because the cement slurry in the mixture has the seam of opinion, be easy to enter in the fit up gap of stirring between tank body both sides transmission part and the fixed component and flow to outside the tank body, be commonly called as the spillage phenomenon.Because containing sand or like solid in the mud, in case clamp-on moving surely gap from housing, moving surely element will wear and tear.And if cement slurry has stopped up lubricated hydraulic fluid port, cement slurry can move partially hardened in the gap surely, and wearing and tearing will be accelerated, and also will accelerate and cause the axle head spillage to the damage of moving element surely.Sealing enters and destroys bearing if cement slurry is broken through support bearing assembly, will cause the stirrer can't proper functioning.Therefore avoid because spillage causes axle head device wear out failure, even cause spring bearing device generation fault to have important practical significance.The sealing configuration of axle head device is one of core technology of stirrer design and manufacturing.
At present, the shaft end seal of double-horizontal axle concrete-mixer adopts the float grease seal structure mostly both at home and abroad.The surface of contact that is characterized in two fluctuate hermetical rings keeps one deck oil film when work, the fit up gap passage should replenish grease at random, make lubricant grease be full of the gap along passage, guarantee that fluctuate hermetical ring can produce good relatively rotate and when working and press to the stirring inner tank wall when being close to sealing stressed under good lubricating status, make that cement slurry is seamless to be bored.Though this kind floating seal can play the shaft end seal effect, but because in the real work, the working environment of stirrer is extremely abominable, in case the seal form of floating seal front is bad or damage, the mortar that still has fine particle enters, and causes floating-ring seal with very fast damage.Therefore, it is not enough only adopting the reliability of one floating seal and working life at the double-horizontal axle concrete-mixer axle head.In the actual stirrer, adopt the shaft end seal of floating seal that the above sealing configuration in 3～4 roads is often arranged.
The model utility content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, a kind of concrete mixer shaft end seal structure is provided, it is simple in structure, reasonable in design, prevented effectively that by the sealing of several roads cement slurry from entering leaking of axle head and lubricant oil, good sealing effect has improved the reliability of shaft end seal, has prolonged machine working life.
For achieving the above object, the technical solution adopted in the utility model is: a kind of concrete mixer shaft end seal structure, it is characterized in that: comprise that to be arranged on the stirrer cylindrical shell inboard and be fixed on the second spindle nose guard circle on the stirrer main shaft, the sidewall position limit cycle that has circular groove outside being installed with on the described second spindle nose guard circle, be provided with the first spindle nose guard circle that the inboard has annular protrusion in the end face circular hole of described stirrer cylindrical shell, described sidewall position limit cycle and the first spindle nose guard circle are the two halves structure, described circular groove matches with annular protrusion, in the gap that 2mm～5mm axially and is radially all arranged, form grooved labyrinth seal chamber between described sidewall position limit cycle and the first spindle nose guard circle between described sidewall position limit cycle and the first spindle nose guard circle; On the described stirrer main shaft and the arranged outside that is positioned at the stirrer cylindrical shell spindle nose stiffening plate is arranged; described spindle nose stiffening plate is fixedlyed connected with the stirrer cylindrical shell; on the described spindle nose stiffening plate spindle nose shell is arranged fixedly; described spindle nose shell is provided with second oil hole; be provided with yellow glue locking steelframe between described spindle nose shell and the first spindle nose guard circle; described yellow glue locking steelframe is provided with yellow glue seal ring; fixedly there is the spindle nose end cap in the outside of described spindle nose shell; described spindle nose end cap is provided with first oil hole; described spindle nose end cap; the spindle nose shell; yellow glue seal ring and yellow glue locking steelframe are fixed together by leading screw; the stirrer main shaft that is positioned at described spindle nose enclosure is provided with the axle jack main body; be provided with the O RunddichtringO between described axle jack main body and the stirrer main shaft; described axle jack main body is pressed on the stirrer main shaft by the axle jack fixture of inclined-plane tensioning; described axle jack fixture is fixedlyed connected with the axle jack main body; be disposed with first floating sealing ring and second floating sealing ring on the described stirrer main shaft from inside to outside; be provided with seal ring between described first floating sealing ring and the axle jack main body and between second floating sealing ring and the spindle nose end cap; on the described stirrer main shaft and the inside that is positioned at the spindle nose end cap is provided with backbone sealing ring, and described backbone sealing ring is positioned at the outside of second floating sealing ring.
Above-mentioned a kind of concrete mixer shaft end seal structure is characterized in that: be provided with paper washer between described spindle nose shell and the spindle nose stiffening plate.
Above-mentioned a kind of concrete mixer shaft end seal structure is characterized in that: the described second spindle nose guard circle is fixed on the stirrer main shaft by first hexagon socket head cap screw.
Above-mentioned a kind of concrete mixer shaft end seal structure is characterized in that: be installed with the sidewall position limit cycle by second hexagon socket head cap screw on the described second spindle nose guard circle.
Above-mentioned a kind of concrete mixer shaft end seal structure is characterized in that: described spindle nose stiffening plate is fixedlyed connected by interior hexagonal thread screw with the stirrer cylindrical shell.
Above-mentioned a kind of concrete mixer shaft end seal structure is characterized in that: by the 3rd hexagon socket head cap screw the spindle nose shell is arranged fixedly on the described spindle nose stiffening plate.
Above-mentioned a kind of concrete mixer shaft end seal structure, it is characterized in that: fixedly there is the spindle nose end cap in the outside of described spindle nose shell by the 4th hexagon socket head cap screw.
Above-mentioned a kind of concrete mixer shaft end seal structure is characterized in that: described axle jack fixture is fixedlyed connected by the 5th hexagon socket head cap screw with the axle jack main body.
The utility model compared with prior art has the following advantages:
1, the utility model is simple in structure, and is reasonable in design, prevented effectively that by the sealing of several roads cement slurry from entering leaking of axle head and lubricant oil, and good sealing effect has improved the reliability of shaft end seal, prolonged machine working life.
2, the utility model has changed the structural type of primary seal with respect to floating seal in the past, adopts the yellow glue locking of rigid material steelframe and the zero clearance between the yellow glue of flexible material to realize sealing.
3, the utility model on the basis of conventional seals is being that the gap of moving surely between spindle nose guard circle and the sidewall position limit cycle changes the radial labyrinth structure into first road sealing; strengthened the resistance when slush enters axle head; reduce mortar and entered the possibility that follow-up floating envelope seals, improved the reliability of sealing and the working life of sealing material.
4, it is easy for installation that the utility model partly cuts open spindle nose guard circle and the sidewall position limit cycle structure of labyrinth flute profile of structure, and moving surely gap guarantees easily, improved operability.
Below by drawings and Examples, the utility model is described in further detail.
Description of drawings
Fig. 1 is overall structure schematic representation of the present utility model.
Fig. 2 removes left view behind the stirrer housing for Fig. 1.
Fig. 3 is the A-A sectional view of Fig. 2.
Description of reference numerals:
1-stirrer main shaft; 2-backbone sealing ring; 3-spindle nose end cap;
4-the four hexagon socket head cap screw; 7-the three hexagon socket head cap screw; 10-the first spindle nose guard circle;
11-sidewall position limit cycle; 12-the first hexagon socket head cap screw; 13-the second spindle nose guard circle;
14-yellow glue locking steelframe; 15-yellow glue seal ring; 16-paper washer;
17-spindle nose shell; 18-1-first floating sealing ring; 18-2-second floating sealing ring;
19-seal ring; 20-O RunddichtringO; 21-the second hexagon socket head cap screw;
22-the five hexagon socket head cap screw; 23-axle jack fixture; 25-axle jack main body;
26-leading screw; 29-the first oil hole; 31-the second oil hole;
32-interior hexagonal thread screw; 33-spindle nose stiffening plate; 34-stirrer cylindrical shell;
35-grooved labyrinth seal chamber.
Embodiment
As shown in Figure 1 to Figure 3, the utility model comprises that to be arranged on stirrer cylindrical shell 34 inboard and be fixed on the second spindle nose guard circle 13 on the stirrer main shaft 1, the sidewall position limit cycle 11 that has circular groove outside being installed with on the described second spindle nose guard circle 13, sidewall position limit cycle 11 is with 1 rotation of stirrer main shaft, be provided with the first spindle nose guard circle 10 that the inboard has annular protrusion in the end face circular hole of described stirrer cylindrical shell 34, described sidewall position limit cycle 11 and the first spindle nose guard circle 10 are the two halves structure, described circular groove matches with annular protrusion, between described sidewall position limit cycle 11 and the first spindle nose guard circle 10 in the gap that 2mm～5mm axially and is radially all arranged, when avoiding sidewall position limit cycle 11 to rotate with between the first spindle nose guard circle 10, produce and rub, form grooved labyrinth seal chamber 35 between described sidewall position limit cycle 11 and the first spindle nose guard circle 10, grooved labyrinth seal chamber 35 structures have strengthened the resistance that slush enters axle head, reduce mortar and entered the possibility that floating envelope seals, improved the reliability of sealing and the working life of sealing material; On the described stirrer main shaft 1 and the arranged outside that is positioned at stirrer cylindrical shell 34 spindle nose stiffening plate 33 is arranged; described spindle nose stiffening plate 33 is fixedlyed connected with stirrer cylindrical shell 34; on the described spindle nose stiffening plate 33 spindle nose shell 17 is arranged fixedly; described spindle nose shell 17 is provided with second oil hole 31; be provided with yellow glue locking steelframe 14 between described spindle nose shell 17 and the first spindle nose guard circle 10; described yellow glue locking steelframe 14 is provided with yellow glue seal ring 15; fixedly there is spindle nose end cap 3 in the outside of described spindle nose shell 17; described spindle nose end cap 3 is provided with first oil hole 29; described spindle nose end cap 3; spindle nose shell 17; yellow glue seal ring 15 and yellow glue locking steelframe 14 are fixed together by leading screw 26; the stirrer main shaft 1 that is positioned at described spindle nose shell 17 inside is provided with axle jack main body 25; at yellow glue seal ring 15 owing to closely contact the formation zero clearance under the pressure that the distortion of self produces with between the axle jack main body 25; be provided with O RunddichtringO 20 between described axle jack main body 25 and the stirrer main shaft 1; described axle jack main body 25 is pressed on the stirrer main shaft 1 by the axle jack fixture 23 of inclined-plane tensioning; described axle jack fixture 23 is fixedlyed connected with axle jack main body 25; be disposed with the first floating sealing ring 18-1 and the second floating sealing ring 18-2 on the described stirrer main shaft 1 from inside to outside; be provided with seal ring 19 between the described first floating sealing ring 18-1 and the axle jack main body 25 and between the second floating sealing ring 18-2 and the spindle nose end cap 3; on the described stirrer the main shaft 1 and inside that is positioned at spindle nose end cap 3 is provided with backbone sealing ring 2, and described backbone sealing ring 2 is positioned at the outside of the second floating sealing ring 18-2.
As shown in Figure 1, be provided with paper washer 16 between described spindle nose shell 17 and the spindle nose stiffening plate 33, the elasticity of the spindle nose end cap 3, spindle nose shell 17, yellow glue seal ring 15 and the yellow glue that are fixed together by leading screw 26 being locked steelframe 14 plays regulating action.
As shown in Figure 1, the described second spindle nose guard circle 13 is fixed on the stirrer main shaft 1 by first hexagon socket head cap screw 12.
As shown in Figure 1, be installed with sidewall position limit cycle 11 by second hexagon socket head cap screw 21 on the described second spindle nose guard circle 13.
As shown in Figure 1, described spindle nose stiffening plate 33 is fixedlyed connected by interior hexagonal thread screw 32 with stirrer cylindrical shell 34.
As shown in Figure 1, by the 3rd hexagon socket head cap screw 7 spindle nose shell 17 is arranged fixedly on the described spindle nose stiffening plate 33.
As shown in Figure 1, fixedly there is spindle nose end cap 3 in the outside of described spindle nose shell 17 by the 4th hexagon socket head cap screw 4.
As shown in Figure 1, described axle jack fixture 23 is fixedlyed connected by the 5th hexagon socket head cap screw 22 with axle jack main body 25.
Working principle of the present utility model is: before machine works, inject extreme pressure lubricant by second oil hole 31, lubricant oil in second oil hole 31 enters annular groove between spindle nose shell 17 and the axle jack main body 25 to the gap between yellow glue seal ring 15 and the axle jack main body 25 and pushes yellow glue seal ring 15, make yellow glue seal ring 15 distortion, lubricant oil enters the gap that forms between yellow glue seal ring 15 and the axle jack main body 25, and yellow glue seal ring 15 is lubricated.Lubricant oil also can arrive the seal oil chamber of floating ring by the gap between axle jack main body 25 and the spindle nose shell 17.Extreme pressure lubricant is full of and forms between the first spindle nose guard circle 10 and the sidewall position limit cycle 11 in the grooved labyrinth seal chamber 35; the lubricant oil that always is full of in the grooved labyrinth seal chamber 35 is lubricated working part; improved the wear resistance of moving part surely; hinder mud simultaneously and enter shaft end seal; play seal action; grooved labyrinth seal chamber 35 structure Design have increased mortar greatly and have entered down the resistance of several roads sealing, make the sealing of first road more firmly with reliable.Yellow glue seal ring 15 produces pressure in the effect of distortion elastic force to yellow glue locking steelframe 14, make second road sealing that forms the zero clearance between yellow glue seal ring 15 and the yellow glue locking steelframe 14, also be primary seal, make that the cement slurry in the moving surely gap is difficult to enter axle head by this gap.The first floating sealing ring 18-1 and the second floating sealing ring 18-2 are three seals, and the gap between control axle jack main body 25 and the stirrer main shaft 1 must be used within the limits prescribed in pairs.Receive that at the assembling type seal ring axial compression produces distortion, thereby produce certain pressure between two rings that two ring end faces fit tightly and form sealing.Simultaneously, floating ring forms a fixed gap in moving surely gap, to store lubricant oil.Backbone sealing ring 2 is the sealing of the 4th road, prevents that the lubricant oil of floating ring inner chamber is to external leakage.This several roads sealing has prevented that effectively cement slurry from entering leaking of axle head and lubricant oil, has improved the reliability of shaft end seal, has prolonged machine working life.In this process, can be by in first oil hole 29, injecting extreme pressure lubricant, to backbone sealing ring 2 and seal ring 19 lubricates.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; every according to the utility model technical spirit to any simple modification, change and equivalent structure transformation that above embodiment does, all still belong in the protection domain of technical solutions of the utility model.
Claims (8)
1. double-horizontal axle concrete-mixer shaft end seal device, it is characterized in that: comprise that to be arranged on stirrer cylindrical shell (34) inboard and be fixed on the second spindle nose guard circle (13) on the stirrer main shaft (1), the sidewall position limit cycle (11) that has circular groove outside being installed with on the described second spindle nose guard circle (13), be provided with the first spindle nose guard circle (10) that the inboard has annular protrusion in the end face circular hole of described stirrer cylindrical shell (34), described sidewall position limit cycle (11) and the first spindle nose guard circle (10) are the two halves structure, described circular groove matches with annular protrusion, in the gap that 2mm～5mm axially and is radially all arranged, form grooved labyrinth seal chamber (35) between described sidewall position limit cycle (11) and the first spindle nose guard circle (10) between described sidewall position limit cycle (11) and the first spindle nose guard circle (10); Described stirrer main shaft (1) is gone up and the arranged outside that is positioned at stirrer cylindrical shell (34) has spindle nose stiffening plate (33); described spindle nose stiffening plate (33) is fixedlyed connected with stirrer cylindrical shell (34); described spindle nose stiffening plate (33) is gone up fixedly spindle nose shell (17); described spindle nose shell (17) is provided with second oil hole (31); be provided with yellow glue locking steelframe (14) between described spindle nose shell (17) and the first spindle nose guard circle (10); described yellow glue locking steelframe (14) is provided with yellow glue seal ring (15); fixedly there is spindle nose end cap (3) in the outside of described spindle nose shell (17); described spindle nose end cap (3) is provided with first oil hole (29); described spindle nose end cap (3); spindle nose shell (17); yellow glue seal ring (15) and yellow glue locking steelframe (14) are fixed together by leading screw (26); be positioned at the inner stirrer main shaft (1) of described spindle nose shell (17) and be provided with axle jack main body (25); be provided with O RunddichtringO (20) between described axle jack main body (25) and the stirrer main shaft (1); described axle jack main body (25) is pressed on the stirrer main shaft (1) by the axle jack fixture (23) of inclined-plane tensioning; described axle jack fixture (23) is fixedlyed connected with axle jack main body (25); be disposed with first floating sealing ring (18-1) and second floating sealing ring (18-2) on the described stirrer main shaft (1) from inside to outside; be provided with seal ring (19) between described first floating sealing ring (18-1) and the axle jack main body (25) and between second floating sealing ring (18-2) and the spindle nose end cap (3); described stirrer main shaft (1) is gone up and the inside that is positioned at spindle nose end cap (3) is provided with backbone sealing ring (2), and described backbone sealing ring (2) is positioned at the outside of second floating sealing ring (18-2).
2. according to the described a kind of double-horizontal axle concrete-mixer shaft end seal device of claim 1, it is characterized in that: be provided with paper washer (16) between described spindle nose shell (17) and the spindle nose stiffening plate (33).
3. according to claim 1 or 2 described a kind of double-horizontal axle concrete-mixer shaft end seal devices, it is characterized in that: the described second spindle nose guard circle (13) is fixed on the stirrer main shaft (1) by first hexagon socket head cap screw (12).
4. according to claim 1 or 2 described a kind of double-horizontal axle concrete-mixer shaft end seal devices, it is characterized in that: the described second spindle nose guard circle (13) is gone up and is installed with sidewall position limit cycle (11) by second hexagon socket head cap screw (21).
5. according to claim 1 or 2 described a kind of double-horizontal axle concrete-mixer shaft end seal devices, it is characterized in that: described spindle nose stiffening plate (33) is fixedlyed connected by interior hexagonal thread screw (32) with stirrer cylindrical shell (34).
6. according to claim 1 or 2 described a kind of double-horizontal axle concrete-mixer shaft end seal devices, it is characterized in that: described spindle nose stiffening plate (33) is gone up fixedly has spindle nose shell (17) by the 3rd hexagon socket head cap screw (7).
7. according to claim 1 or 2 described a kind of double-horizontal axle concrete-mixer shaft end seal devices, it is characterized in that: fixedly there is spindle nose end cap (3) in the outside of described spindle nose shell (17) by the 4th hexagon socket head cap screw (4).
8. according to claim 1 or 2 described a kind of double-horizontal axle concrete-mixer shaft end seal devices, it is characterized in that: described axle jack fixture (23) is fixedlyed connected by the 5th hexagon socket head cap screw (22) with axle jack main body (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220747823 CN203223555U (en) | 2012-12-29 | 2012-12-29 | Sealing structure of shaft end of concrete mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220747823 CN203223555U (en) | 2012-12-29 | 2012-12-29 | Sealing structure of shaft end of concrete mixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203223555U true CN203223555U (en) | 2013-10-02 |
Family
ID=49250559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220747823 Expired - Fee Related CN203223555U (en) | 2012-12-29 | 2012-12-29 | Sealing structure of shaft end of concrete mixer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203223555U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032572A (en) * | 2012-12-29 | 2013-04-10 | 长安大学 | Shaft end sealing device for double-horizontal-shaft concrete stirrer |
| CN104669436A (en) * | 2014-12-25 | 2015-06-03 | 中联重科股份有限公司 | Concrete mixer, shaft end sealing structure of concrete mixer and shaft end failure removal method |
| CN105090516A (en) * | 2014-05-15 | 2015-11-25 | 中联重科股份有限公司 | Agitator and shaft end sealing structure thereof and shaft end sealing structure installation method |
| CN106678038A (en) * | 2017-02-15 | 2017-05-17 | 王映辉 | Double-triangular rotor pump |
-
2012
- 2012-12-29 CN CN 201220747823 patent/CN203223555U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032572A (en) * | 2012-12-29 | 2013-04-10 | 长安大学 | Shaft end sealing device for double-horizontal-shaft concrete stirrer |
| CN105090516A (en) * | 2014-05-15 | 2015-11-25 | 中联重科股份有限公司 | Agitator and shaft end sealing structure thereof and shaft end sealing structure installation method |
| CN104669436A (en) * | 2014-12-25 | 2015-06-03 | 中联重科股份有限公司 | Concrete mixer, shaft end sealing structure of concrete mixer and shaft end failure removal method |
| CN106678038A (en) * | 2017-02-15 | 2017-05-17 | 王映辉 | Double-triangular rotor pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131002 Termination date: 20141229 |
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| EXPY | Termination of patent right or utility model |