CN103977736A - Shaft-end sealing mechanism of stirring shaft and sealing method of shaft-end sealing mechanism - Google Patents
Shaft-end sealing mechanism of stirring shaft and sealing method of shaft-end sealing mechanism Download PDFInfo
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- CN103977736A CN103977736A CN201410238345.0A CN201410238345A CN103977736A CN 103977736 A CN103977736 A CN 103977736A CN 201410238345 A CN201410238345 A CN 201410238345A CN 103977736 A CN103977736 A CN 103977736A
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Abstract
The invention relates to the technical field of engineering machinery and particularly relates to a shaft-end sealing mechanism of a stirring shaft and a sealing method of the shaft-end sealing mechanism. The shaft-end sealing mechanism comprises a gasbag type shaft-end sealing device, an air charging device and a pressure-regulation control device, wherein the gasbag type shaft-end sealing device is throughout in tight contact with a shaft sleeve under certain pressure; the air charging device is connected with the gasbag type shaft-end sealing device and is used for charging compressed air into the gasbag type shaft-end sealing device; the pressure-regulation control device comprises a pressure sensing element and a comparator, the pressure sensing element is used for detecting pressure or temperature signals between the gasbag type shaft-end sealing device and the shaft sleeve and sending the signals into the comparator, and the comparator is used for sending starting and stopping signals to the air charging device. With the sealing method of the shaft-end sealing mechanism, the operation is simple, the sealing performance is good, the maintenance cost is low, a working condition of the gasbag type shaft-end sealing device can be monitored in real time, the air charging device can be regulated according a sealing condition, and besides, a stirring machine can be controlled to stop so as to protect the end of the stirring shaft.
Description
Technical field
The present invention relates to technical field of engineering machinery, be specifically related to a kind of sealing mechanism for shaft end for shaft and encapsulating method.
Background technology
Existing concrete mixer generally includes a mixing bowl, be arranged at the shaft in a mixing bowl, shaft axle head is connected by black box with a mixing bowl, traditional encapsulating method mainly contains two kinds: the one, and adopt float grease seal to add the compound seal of sealing ring, the 2nd, adopt sealing ring to add the combination sealing of hermetic seal, adopt float grease seal to add the compound seal of sealing ring, sealing effectiveness is stable, reliability is higher, be subject to the favor of a lot of mixer producer, but this kind of sealing means is high to the making required precision of black box, thereby its production, maintenance cost is high, and this kind of hermetically-sealed construction is in use in order to guarantee the reliability of sealing, need toward the interrupted or continuous injection lubricating grease in sealing position, the consumption of lubricating grease causes equipment use cost to rise, also there are the problems referred to above in the combination sealing that adopts sealing ring to add hermetic seal.
For addressing the above problem, first occurred on the market only depending on packing_seal to add the axle head that suitable compressed air seals, this kind of hermetically-sealed construction installed simply, does not need to add butter, maintaining cost is lower, if but this kind of sealing device people when pressure anomaly do not process in time, will cause material in a mixing bowl to immerse the axle head axle sleeve of grinding away, even wear spindle holds, and causes sealing accordingly position and is worn and lost efficacy.
Summary of the invention
In order to overcome the deficiencies in the prior art, provide a kind of sealing mechanism for shaft end for shaft and encapsulating method thereof.
For achieving the above object, the invention provides a kind of sealing mechanism for shaft end for shaft, this sealing mechanism for shaft end is sheathed on the axle sleeve of shaft, it is characterized in that: comprise gasbag-type axle end sealing device, aerating device and Regulation Control device, described gasbag-type axle end sealing device constantly keeps close contact with axle sleeve under certain pressure, aerating device is connected with gasbag-type axle end sealing device for being filled with compressed air to it, Regulation Control device comprises pressure sensitivity element and comparator, pressure or the temperature signal of this pressure sensitivity element testing gasbag-type axle end sealing device and shaft room also sent signal into comparator, this comparator sends and opens to aerating device, stop signal.
Further, gasbag-type axle end sealing device comprises axle head mount pad, seal box and air bag, and this axle head mount pad is located at axle sleeve outside, and seal box is arranged at axle head mount pad and shaft room and surrounds closed chamber with axle sleeve, and air bag is arranged in closed chamber.
Further, seal box comprises casing and protection ring, and this casing, protection ring and axle sleeve surround closed chamber.
Further, gasbag-type axle end sealing device also comprises the wear resistant filler on the contact-making surface that is arranged in air bag and axle sleeve.
Further, pressure sensitivity element is arranged between air bag and wear resistant filler.
Further, pressure sensitivity element is piezoelectric transducer or thermocouple.
Further, aerating device comprises pressure regulation filter, gas tube, gauge tap and check valve, and this pressure regulation filter is connected with gasbag-type axle end sealing device by gas tube, and gauge tap and check valve are installed on gas tube successively.
Shaft end seal method for shaft, adopts the above-mentioned sealing mechanism for shaft end for shaft, comprises the following steps:
Before mixer work, aerating device makes it wrap axle sleeve to the inflation of gasbag-type axle end sealing device, guarantees that it contacts fully;
During mixer work, pressure signal or temperature between pressure sensitivity element monitoring gasbag-type axle end sealing device and axle sleeve also sent signal into comparator, when pressure or temperature set value lower than comparator, comparator sends start signal to aerating device, aerating device to gasbag-type axle end sealing device inflation until pressure sensitivity element testing to comparator pressure or temperature value, stop during higher than default value.
Optimize, aerating device is after gasbag-type axle end sealing device inflation certain hour, and monitoring pressure or temperature do not rise to preset value yet, and comparator can send halt instruction and force mixer shutdown.
Optimize, gasbag-type axle end sealing device should be changed after reaching attrition value.
From the above-mentioned description of this invention; compared with prior art; the invention provides the sealing mechanism and the method that have changed existing shaft axle head; adopt new sealing mechanism and encapsulating method; by gasbag-type axle end sealing device and aerating device, realize the sealing to the axle head of shaft; it is simple to operate, good seal performance, maintenance cost are low; by Regulation Control device, monitor in real time the working condition of bellows seal device; and regulating aerating device according to sealing situation, this Regulation Control device can be controlled the axle head that mixer shuts down to protect shaft in addition.
Accompanying drawing explanation
Fig. 1 is that the present invention is for the structural representation of the sealing mechanism for shaft end of shaft.
The specific embodiment
Below by the specific embodiment, the invention will be further described.
Shown in Fig. 1, a kind of sealing mechanism for shaft end for shaft, be located on the axle sleeve 101 of shaft 100, for mixer and shaft 100 axle heads are sealed, it can be single horizontal axis structure, Double-horizontal-shaft structure, vertical shaft planetary structure for described mixer, or forced action type and gravity type, and agravic formula etc. form, can be also for stirring bituminous concrete, cement concrete, dry-mixed mortar, feed and food medicine and other fields; Described sealing mechanism for shaft end comprises gasbag-type axle end sealing device 1, aerating device 2 and Regulation Control device 3.
Gasbag-type axle end sealing device 1 comprises axle head mount pad 11, seal case 12, air bag 13 and wear resistant filler 14, wherein axle head mount pad 11 is located at axle sleeve 101 outsides, seal box 12 is comprised of casing 121 and protection ring 122, this casing 121, protection ring 122 surround closed chamber 123 with axle sleeve 101, air bag 13 is arranged in closed chamber 123, wear resistant filler 14 is arranged on the contact-making surface of air bag 13 and axle sleeve 101, and this wear resistant filler 14 adopts the removable material with self-lubricating function; Air bag 13 is fixed in closed chamber 123, can only be to axle sleeve 101 inner side pressurizations, between wear resistant filler 14 and axle sleeve 101, under certain pressure, keep close contact constantly, the sealing of realization to shaft 100 axle heads, along shaft 100, axially can only arrange single air bag 13, many rows that also can be arranged side by side, when axial multilayer is arranged air bag 13, from mixer inner side more close to air bag 13 pressure can set corresponding higherly, seal more reliable.
Aerating device 2 comprises pressure regulation filter 21, gas tube 22, gauge tap 23 and check valve 24, this pressure regulation filter 21 is connected with air bag 13 by gas tube 22, gauge tap 23 and check valve 24 are installed on gas tube successively, and when gauge tap 23 is opened, pressure regulation filter 21 pressure regulation filter 21 when being filled with compressed air, gauge tap 23 in air bag 13 and cutting out stops being filled with compressed air in air bag 13.
Regulation Control device 3 comprises pressure sensitivity element 31 and comparator 32, this pressure sensitivity element 31 is for being arranged at piezoelectric transducer or thermocouple between air bag 13 and wear resistant filler 14, contact or temperature when shaft 100 normal rotation between pressure sensitivity element 31 Real-Time Monitoring wear resistant fillers 14 and axle sleeve 101, and signal is transferred to comparator 32, this comparator 32 sends to gauge tap 23 and opens, stop signal.
Shown in Fig. 1, for the shaft end seal method of shaft, adopt the above-mentioned sealing mechanism for shaft end for shaft, comprise the following steps:
Before mixer work, pressure regulation filter 21 makes it wrap axle sleeve 101 to air bag 13 inflations, until keep close contact between wear resistant filler 12 and axle sleeve 101, realizes the sealing to shaft 100 axle heads;
During mixer work, stir main shaft 100 rotations, pressure signal or temperature between pressure sensitivity element 31 monitoring air bags 13 and axle sleeve 101 also sent signal into comparator 32, when pressure or temperature are during lower than comparator 32 setting value, comparator 32 sends start signal to gauge tap 23, aerating device 2 fills as compressed air in air bag 13, until pressure sensitivity element 31 stops while comparator 32 pressure or temperature value being detected higher than default value, if aerating device 2 is after air bag 13 inflation certain hours, the pressure that pressure sensitivity element 31 monitors or temperature do not rise to preset value yet, comparator can send halt instruction and forces mixer to shut down to protect stirring axle head,
When mixer quits work, check that whether bleed pressure is in normal range (NR), or the abrasion condition of wear resistant filler 14, as changed wear resistant filler 14, only need emit the compressed air in air bag 13 some and can easily wear resistant filler 14 be taken off and be changed.
Above are only a specific embodiment of the present invention, but design concept of the present invention is not limited to this, allly utilizes this design to carry out the change of unsubstantiality to the present invention, all should belong to the behavior of invading protection domain of the present invention.
Claims (10)
1. for the sealing mechanism for shaft end of shaft, this sealing mechanism for shaft end is sheathed on the axle sleeve of shaft, it is characterized in that: comprise gasbag-type axle end sealing device, aerating device and Regulation Control device, described gasbag-type axle end sealing device constantly keeps close contact with axle sleeve under certain pressure, aerating device is connected with gasbag-type axle end sealing device for being filled with compressed air to it, Regulation Control device comprises pressure sensitivity element and comparator, pressure or the temperature signal of this pressure sensitivity element testing gasbag-type axle end sealing device and shaft room also sent signal into comparator, this comparator sends and opens to aerating device, stop signal.
2. the sealing mechanism for shaft end for shaft according to claim 1, it is characterized in that: described gasbag-type axle end sealing device comprises axle head mount pad, seal box and air bag, this axle head mount pad is located at axle sleeve outside, seal box is arranged at axle head mount pad and shaft room and surrounds closed chamber with axle sleeve, and air bag is arranged in closed chamber.
3. the sealing mechanism for shaft end for shaft according to claim 2, is characterized in that: described seal box comprises casing and protection ring, and this casing, protection ring and axle sleeve surround closed chamber.
4. the sealing mechanism for shaft end for shaft according to claim 2, is characterized in that: described gasbag-type axle end sealing device also comprises the wear resistant filler on the contact-making surface that is arranged in air bag and axle sleeve.
5. the sealing mechanism for shaft end for shaft according to claim 4, is characterized in that: described pressure sensitivity element is arranged between air bag and wear resistant filler.
6. according to claim 1 or 5 for the sealing mechanism for shaft end of shaft, it is characterized in that: described pressure sensitivity element is piezoelectric transducer or thermocouple.
7. the sealing mechanism for shaft end for shaft according to claim 1, it is characterized in that: described aerating device comprises pressure regulation filter, gas tube, gauge tap and check valve, this pressure regulation filter is connected with gasbag-type axle end sealing device by gas tube, and gauge tap and check valve are installed on gas tube successively.
8. for the shaft end seal method of shaft, it is characterized in that: adopt the sealing mechanism for shaft end for shaft described in above-mentioned any one, comprise the following steps:
Before mixer work, aerating device makes it wrap axle sleeve to the inflation of gasbag-type axle end sealing device, guarantees that it contacts fully;
During mixer work, pressure signal or temperature between pressure sensitivity element monitoring gasbag-type axle end sealing device and axle sleeve also sent signal into comparator, when pressure or temperature set value lower than comparator, comparator sends start signal to aerating device, aerating device to gasbag-type axle end sealing device inflation until pressure sensitivity element testing to comparator pressure or temperature value, stop during higher than default value.
9. the shaft end seal method for shaft according to claim 8; it is characterized in that: described aerating device is after gasbag-type axle end sealing device inflation certain hour; monitoring pressure or temperature do not rise to preset value yet, and comparator can send halt instruction and force mixer shutdown.
10. the shaft end seal method for shaft according to claim 8 or claim 9, is characterized in that: described gasbag-type axle end sealing device should be changed after reaching attrition value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410238345.0A CN103977736B (en) | 2014-05-30 | 2014-05-30 | For sealing mechanism for shaft end and the encapsulating method thereof of shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410238345.0A CN103977736B (en) | 2014-05-30 | 2014-05-30 | For sealing mechanism for shaft end and the encapsulating method thereof of shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103977736A true CN103977736A (en) | 2014-08-13 |
| CN103977736B CN103977736B (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410238345.0A Active CN103977736B (en) | 2014-05-30 | 2014-05-30 | For sealing mechanism for shaft end and the encapsulating method thereof of shaft |
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| CN (1) | CN103977736B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104565380A (en) * | 2015-01-06 | 2015-04-29 | 福建南方路面机械有限公司 | Closed-loop stirring shaft sealing mechanism and sealing method thereof |
| CN106287790A (en) * | 2016-08-31 | 2017-01-04 | 戴春喜 | Rotary regenerative air preheater and sealing structure thereof |
| CN112114105A (en) * | 2020-08-28 | 2020-12-22 | 生态环境部南京环境科学研究所 | Basin water ecological safety monitoring and early warning system |
| CN113023250A (en) * | 2021-03-04 | 2021-06-25 | 上饶中材机械有限公司 | Novel embedded scraper conveyor in shell sealing mode |
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| US4470607A (en) * | 1982-11-26 | 1984-09-11 | Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) | Apparatus for sealing a high pressure installation including a movable member, especially an oscillatory movable plunger or a rotary shaft |
| CN1374468A (en) * | 2000-12-28 | 2002-10-16 | B+V工业技术股份有限公司 | Sealing apparatus for rotating shaft especially ship trailing axle tube |
| CN2721978Y (en) * | 2004-08-26 | 2005-08-31 | 江苏牧羊集团有限公司 | Axial sealer |
| CN2748710Y (en) * | 2004-09-17 | 2005-12-28 | 攀钢集团攀枝花钢铁研究院 | Sealing device |
| CN201539572U (en) * | 2009-08-13 | 2010-08-04 | 都江堰东翔环保科技有限公司 | Device for conducting contact seal through constant pressure of air sac |
| CN102147013A (en) * | 2010-02-08 | 2011-08-10 | 祥景精机股份有限公司 | Air bag-type leakage-proof device |
| CN202288779U (en) * | 2011-10-24 | 2012-07-04 | 重庆普施康科技发展有限公司 | Dynamic delay compensating device for solenoid valve of external counter-pulsation system |
| CN203862199U (en) * | 2014-05-30 | 2014-10-08 | 福建南方路面机械有限公司 | Shaft end sealing mechanism for stirring shaft |
-
2014
- 2014-05-30 CN CN201410238345.0A patent/CN103977736B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4470607A (en) * | 1982-11-26 | 1984-09-11 | Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) | Apparatus for sealing a high pressure installation including a movable member, especially an oscillatory movable plunger or a rotary shaft |
| CN1374468A (en) * | 2000-12-28 | 2002-10-16 | B+V工业技术股份有限公司 | Sealing apparatus for rotating shaft especially ship trailing axle tube |
| CN2721978Y (en) * | 2004-08-26 | 2005-08-31 | 江苏牧羊集团有限公司 | Axial sealer |
| CN2748710Y (en) * | 2004-09-17 | 2005-12-28 | 攀钢集团攀枝花钢铁研究院 | Sealing device |
| CN201539572U (en) * | 2009-08-13 | 2010-08-04 | 都江堰东翔环保科技有限公司 | Device for conducting contact seal through constant pressure of air sac |
| CN102147013A (en) * | 2010-02-08 | 2011-08-10 | 祥景精机股份有限公司 | Air bag-type leakage-proof device |
| CN202288779U (en) * | 2011-10-24 | 2012-07-04 | 重庆普施康科技发展有限公司 | Dynamic delay compensating device for solenoid valve of external counter-pulsation system |
| CN203862199U (en) * | 2014-05-30 | 2014-10-08 | 福建南方路面机械有限公司 | Shaft end sealing mechanism for stirring shaft |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104565380A (en) * | 2015-01-06 | 2015-04-29 | 福建南方路面机械有限公司 | Closed-loop stirring shaft sealing mechanism and sealing method thereof |
| CN106287790A (en) * | 2016-08-31 | 2017-01-04 | 戴春喜 | Rotary regenerative air preheater and sealing structure thereof |
| CN112114105A (en) * | 2020-08-28 | 2020-12-22 | 生态环境部南京环境科学研究所 | Basin water ecological safety monitoring and early warning system |
| CN113023250A (en) * | 2021-03-04 | 2021-06-25 | 上饶中材机械有限公司 | Novel embedded scraper conveyor in shell sealing mode |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103977736B (en) | 2016-03-30 |
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Address after: 362000 Fujian province Quanzhou Fengze District High-tech Industrial Park Sports Street No. 700 Patentee after: Fujian Nanfang pavement machinery Co., Ltd Address before: 362000 Fujian province Quanzhou Fengze District High-tech Industrial Park Sports Street No. 700 Patentee before: FUJIAN SOUTH HIGHWAY MACHINERY Co.,Ltd. |