CN2428764Y - Mechanical sealing test apparatus with controllable spring specific-pressure and measurable vibration - Google Patents
Mechanical sealing test apparatus with controllable spring specific-pressure and measurable vibration Download PDFInfo
- Publication number
- CN2428764Y CN2428764Y CN 00220907 CN00220907U CN2428764Y CN 2428764 Y CN2428764 Y CN 2428764Y CN 00220907 CN00220907 CN 00220907 CN 00220907 U CN00220907 U CN 00220907U CN 2428764 Y CN2428764 Y CN 2428764Y
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- seal
- main shaft
- force transducer
- axle sleeve
- mechanical seal
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
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Abstract
The utility model relates to a mechanical sealing test apparatus with controllable spring specific-pressure and measurable vibration under a dynamic state. The utility model is characterized in that the utility model adopts a cantilever type sealing test main shaft with a wide span and two supporting points. Under a dynamic state, a loading cylinder of spring force and vibration amplitude of vibration are measured. The utility model uses a measured mechanical seal as a sealing element of a power input shaft of a sealing cavity. The sealing performance of mechanical seal under a low pressure liquid situation in a test can be improved. When the sealing cavity is altered a little, the seal of the power input shaft is replaced by another sealing element, the measured mechanical seal and the loading cylinder of spring force are arranged end for end, the end part of a piston of the loading cylinder is screwed with a leak measured cavity body provided with a differential pressure measuring instrument, and the leak rate of the mechanical seal can be exactly measured. The utility model has the advantages of compact structure, convenient assembly and disassembly for the seal, and large size and speed range for the seal which is measured. The utility model is an important method for studying and developing a novel mechanical seal, confirming optimum working parameters and determining the sealing performance.
Description
The utility model relates to the mechanical sealing technology field, and especially a kind of specific pressure controllable parameters system also can detect the mechanical seal test device of mechanical vibration.
At present, the mechanical seal test device in the known technology is made up of motor, gear increaser mechanism, test mechanism and testing meter and instrument.Under main research and measurement uniform temperature, pressure and the velocity conditions, face pressure is controlled at the slip and the rate of wear of mechanical seal in 0.2～0.4Mpa scope.Yet, for the mechanical seal under the concrete occasion, in face pressure is controlled at this relative broad range during arbitrary value, be difficult to guarantee simultaneously its sealing ability and serviceable lifes two aspect require, all the more so when especially having vibration.Disregarding under the situation of vibration effect, only considering from sealing ability, improve face pressure and be effective measures the most, but this will destroy liquid film, aggravation is worn and torn, reduction of service life; If only consider serviceable life, sealing is under the full state of liquid friction, then leakage rate will increase greatly, can't guarantee the sealing property of pump.And for concrete mechanical seal, its face pressure depends mainly on spring pressure.Therefore, select suitable running parameter for use, the requirement that takes into account two aspects is essential.Under the situation that has vibration, to the influence of mechanical sealing performance how the size of amplitude yet there are no all reports.In addition, the slip in the known technology generally all adopts the opening graduated cylinder to measure, and is controlled at 3～6ml/h, disregards the medium because of end-face friction temperature rise vaporization loss.But for inflammable, explosive, poisonous medium, its slip just should count this medium because of vaporization loss.Obviously, adopt the opening graduated cylinder to measure, its precision is not enough.Adopt the airtight chamber of leaking hunting, be aided with differential pressure pickup and can accurately measure tested mechanical seal leakage rate.
The purpose of this utility model is to overcome weak point in the above-mentioned known technology, mechanical seal exists a suitable seal pressure in concrete machinery and equipment viewpoint is proposed, be that lower (not being meant must zero leakage for slip, and be meant little value in tolerance band) and serviceable life long viewpoint, and under this viewpoint instructs, design novel spring pressure may command and the detectable mechanical seal test device of mechanical activation amplitude, using in production practices for above viewpoint provides equipment condition.
For achieving the above object, general thought of the present utility model is to adopt large span two fulcrum cantilevered leakage test main shafts, carrying out spring force loading and vibration amplitude dynamically measures, with the seal of tested mechanical seal, can test the sealing property of mechanical seal under the mesolow liquid condition as the annular seal space power input shaft; As annular seal space is changed slightly, the sealing of power input shaft is replaced with another seal, tested mechanical seal and spring force are loaded the cylinder tune install, and screw on the cavity that leaks hunting that has the differential pressure measurement instrument loading the cylinder pistons end, just the slip of measurement mechanical sealing very accurately.
The technical solution of the utility model is, the controlled vibration measurable type of this spring pressure mechanical seal test device is made of base, guide rail, planker, annular seal space, motor, shaft coupling, bearing seat, main shaft, axle sleeve, hydraulic loaded cylinder, force transducer, torque sensor, vialog, tensimeter etc., the power output shaft of motor links by two shaft couplings and torque sensor and main shaft, the bearing block support main shaft, motor, bearing seat are fixed on the base; Base is provided with guide rail, settles planker, annular seal space to be fixed on this planker on the guide rail; Annular seal space is provided with test(ing) medium inlet, test(ing) medium outlet, tensimeter and leaks hunting a little, is provided with force transducer near motor one side in the annular seal space, is provided with O-ring seal between this sensor and the seal chamber; The nearly motor of annular seal space one side is equipped with the hydraulic loaded cylinder, and the piston rod of this hydraulic loaded cylinder leans force transducer, in this hydraulic loaded cylinder O-ring seal is set; The main shaft of driven by motor passes the hydraulic loaded cylinder and extend in the annular seal space, axle sleeve is sleeved on the main shaft, thereby this axle sleeve termination and main shaft are reverse thread and are connected tested mechanical seal workpiece is fitted between axle sleeve termination and the force transducer, the stationary ring of mechanical seal workpiece is fixed on the force transducer, between stationary ring and the force transducer O-ring seal is set, the jut of outer, axle sleeve termination is embedded into the sealing work end and covers and stop in the groove; At a place of leaking hunting, settle load sensor; Vialog is installed at the bearing seat place.
For achieving the above object, another technical scheme of the present utility model is the adjustment to the aforementioned techniques scheme, promptly adopting the axle sleeve bottom to be reverse thread with main shaft is connected, thereby tested mechanical seal and spring force are loaded cylinder tune installation, and annular seal space changed slightly, the sealing of power input shaft is replaced with another seal, and screw on the cavity that leaks hunting that has minute-pressure difference measurements instrument, just become accurately measurement mechanical seal leakage rate scheme at loading cylinder pistons end.
The utility model has the advantages that: 1. dynamically can measure and control the spring pressure of mechanical seal down, thereby calculate face pressure, control the wearing and tearing between mechanical seal end surface better, prolong its serviceable life; 2. by changing axle sleeve, can detect the sealing property of the mechanical sealing member of different-diameter; 3. use the seal of tested mechanical seal, reduced by a leakage point, help the stable of the interior pressure medium of seal chamber as the annular seal space power input shaft.4. considered the influence of vibration to sealing property.In addition, this test unit mounting or dismounting sealing is convenient, and tested closure size scope is big, compact conformation, highly versatile.The utility model test unit is mainly used in the sealing property test of pump with mechanical seal, is the sealing of research and development novel mechanical, determines optimum running parameter and the important means of measuring its sealing property.
Accompanying drawing 1 is technical solutions of the utility model one structural representations.
Accompanying drawing 2 is in the technical solutions of the utility model one, axle sleeve, main shaft, tested mechanical seal workpiece johning knot composition.
Accompanying drawing 3 is technical solutions of the utility model two structural representations.
Accompanying drawing 4 is in the technical solutions of the utility model two, axle sleeve, main shaft, tested mechanical seal workpiece johning knot composition.
In the accompanying drawing 1,1-guide rail, the outlet of 2-test(ing) medium, the 3-planker, 4-annular seal space, 5-test(ing) medium inlet, the 6-axle sleeve, 7-tensimeter, the tested mechanical seal of 8-, 9-force transducer, 10-leak hunting a little, 11-hydraulic loaded cylinder, 12,15-bearing, 13-base, 14-main shaft, 16,18-shaft coupling, 17-torque sensor, 19-motor.
In the accompanying drawing 2, the 4-annular seal space, the 20-sealing gasket, 21-axle sleeve termination, the 22-rotating seat, the 23-spring, the 6-axle sleeve, the 24-rotating ring, the 25-stationary ring, 9-force transducer (stationary seat), 10-leaks hunting a little, and 11-loads cylinder, 14-main shaft.
In the accompanying drawing 3, the 28-atmospheric valve, 29-micro-pressure sensor interface, 30-leaks the chamber, 31-loads cylinder, 32-plug, 33-force transducer (stationary seat), the tested mechanical seal of 34-, 35-axle sleeve, 36-annular seal space, the 37-tensimeter, 38-charging valve, 39-O-ring seal, the 40-main shaft, 41, the 43-bearing, the 42-base, 44,46-shaft coupling, 45-torque sensor, 47-motor.
In the accompanying drawing 4,29-micro-pressure sensor interface, 31-loads cylinder, the 48-O-ring seal, 33-force transducer (stationary seat), 49-sealing gasket, the 50-O-ring seal, 51-stationary ring, 52-rotating ring, the 53-axle sleeve, 35-axle sleeve, 36-annular seal space, the 54-rotating seat, 37-tensimeter, 55-axle sleeve termination, the 38-charging valve, 39-O-ring seal, 40-main shaft.
Introduce two embodiment of the present utility model below in conjunction with accompanying drawing:
Embodiment one: adopt mechanical seal test device shown in the accompanying drawing 1,2 to test raising factory of sub-petro-chemical corporation mechanical seal for pump.In this device,, stationary seat is designed to the axially-displaceable formula for measuring and adjusting spring pressure; Between the hydraulic loaded equipment behind stationary seat and the annular seal space, the force transducer of connecting, in order to measurement mechanical Packing spring power and the medium acting force to mechanical seal, the change of spring force realizes by hydraulic loaded equipment.Main shaft by variable-frequence governor, is realized stepless speed regulation by motor; Between motor and main shaft, the torque sensor of connecting is in order to measure the friction torque between the mechanical seal friction pair under the different working conditions.Pressure medium is provided through surge tank by force (forcing) pump, and for guaranteeing constant pressure and easy to adjust, basin inserts nitrogen cylinder via reduction valve.The sealing of tested mechanical seal as axle adopted in the sealing of annular seal space, saved additional leakage point.Tested mechanical seal is installed on the axle sleeve.At the bearing seat place vialog is installed, in order to of the influence of measuring vibrations amplitude size to sealing property.This test unit major parameter is: rotating speed 0-6000r/min; Tested sealing load 0-3Mpa; Tested closure size scope 55-90mm.
Concrete process of the test is as follows: the bellows springs specific pressure p that this pump brand-name computer tool sealed junction is defocused
Sp=0.192MPa, serviceable life is about 3 months.Adopt mechanically-sealing apparatus simulated condition condition shown in the accompanying drawing 1,2 to test, at pressure medium P
h=0.84MPa under the condition of n=2938rpm, for the bellows type mechanical seal of K=0.62, adopts water as test(ing) medium, and the regulating spring specific pressure reaches the bellows springs specific pressure p after the coking
Sp=0.192MPa is though slip q=0.5ml/h has reduced friction torque M
b=1.4128Nm but correspondingly increases, and causes mechanical seal just to be lost efficacy in the not long working time.Simultaneously, record as spring pressure p
Sp=0.135MPa, slip q=3ml/h, friction torque M
b=1.1058Nm, amplitude is under positive and negative 0.3 millimeter (adopting BZ-530 type vialog) working condition, seal pressure is less at this moment, slip is less, and wear and tear less (reach 7 months sealing life), as seen this working point is the suitable running parameter that this pump mechanical sealing runs well.What be worth proposition is, the mechanical seal test device that the utility model the provides amplitude of measurement mechanical vibration in the lump that takes the lead in process of the test, although still can't estimate of the direct influence of mechanical vibration factor at present exactly to seal parameters, but the existence of this influence has been a undisputable fact, for this reason, this test unit is installed vialog on bearing seat, be actually this undesirable element of mechanical vibration is confined in the amplitude range, with the validity that guarantees that seal parameters is measured.
Present embodiment is mainly used in the sealing property test of pump with mechanical seal, and this test unit is the sealing of research and development novel mechanical, determines optimum running parameter and the important means of measuring its sealing property.Because the loading of spring force in service is finished by hydraulic loaded equipment, make that the loading force size is steady and easy to control; In addition, this test unit can adapt to the mechanical seal that detects the different size specification by the band internal thread of employing different size and the axle sleeve of butt-end packing; In addition, the sealing of tested mechanical sealing member as axle adopted in the sealing of this test unit annular seal space, do not have additional leakage point; Moreover the leakage rate of tested mechanical seal adopts load sensor to measure.
Embodiment two: present embodiment adopts the seal test device shown in the accompanying drawing 3,4 that mechanical seal for pump is tested.It is that annular seal space among the embodiment one is changed slightly that present embodiment provides seal test device, the sealing that is about to power input shaft replaces with another seal, tested mechanical seal and spring force are loaded cylinder tune installation, and screw on the cavity that leaks hunting that has the differential pressure measurement instrument loading the cylinder pistons end, just become accurately measurement mechanical seal leakage rate scheme.The control of present embodiment operating condition of test condition is selected, and the monitoring of mechanical vibration amplitude no longer repeats at this with embodiment one.The cavity that leaks hunting that is increased in the present embodiment, make the liquids and gases of leakage all obtain collecting and not leaking, promptly the test(ing) medium in annular seal space (comprising liquids and gases) passes the slit of mechanical sealing static ring seat and hydraulic loaded cylinder central authorities, enter the cavity that leaks hunting, can accurately measure the leakage rate of tested mechanical seal by the micro-pressure sensor in the airtight leakage chamber.Present embodiment this improvement has structurally increased on the one hand the precision of test unit leak data, on the other hand, also provides device to ensure for the safety test that is used for poisonous and harmful mechanical seal and the mensuration of applying working condition condition.
Claims (2)
1, the controlled vibration measurable type of a kind of spring pressure mechanical seal test device, it is characterized in that: this device is made of base, guide rail, planker, annular seal space, motor, shaft coupling, bearing seat, main shaft, axle sleeve, hydraulic loaded cylinder, force transducer, torque sensor, vialog, tensimeter etc., the power output shaft of motor links by two shaft couplings and torque sensor and main shaft, the bearing block support main shaft, motor, bearing seat are fixed on the base; Base is provided with guide rail, and planker is set on the guide rail, and annular seal space is fixed on this planker; Annular seal space is provided with test(ing) medium inlet, test(ing) medium outlet, tensimeter and leaks hunting a little, is provided with force transducer near motor one side in the annular seal space, is provided with O-ring seal between this sensor and the seal chamber; The nearly motor of annular seal space one side is equipped with the hydraulic loaded cylinder, and the piston rod of this hydraulic loaded cylinder leans force transducer, in this hydraulic loaded cylinder O-ring seal is set; The main shaft of driven by motor passes the hydraulic loaded cylinder and extend in the annular seal space, axle sleeve is sleeved on the main shaft, thereby this axle sleeve termination and main shaft are reverse thread and are connected tested mechanical seal workpiece is fitted between axle sleeve termination and the force transducer, the stationary ring of mechanical seal workpiece is fixed on the force transducer, between stationary ring and the force transducer O-ring seal is set, the jut of outer, axle sleeve termination is embedded into the sealing work end and covers and stop in the groove; At a place of leaking hunting, settle load sensor; Vialog is installed at the bearing seat place.
2, the controlled vibration measurable type of a kind of spring pressure mechanical seal test device, it is characterized in that: this device is made of base, guide rail, planker, annular seal space, the cavity that leaks hunting, motor, shaft coupling, bearing seat, main shaft, axle sleeve, hydraulic loaded cylinder, force transducer, torque sensor, vialog, tensimeter, differential pressure measurement instrument etc., the power output shaft of motor links by two shaft couplings and torque sensor and main shaft, the bearing block support main shaft, motor, bearing seat are fixed on the base; Base is provided with guide rail, and planker is set on the guide rail, and annular seal space is fixed on this planker; Annular seal space is provided with test(ing) medium inlet, tensimeter and leaks hunting a little, is provided with force transducer away from motor one end in the annular seal space, is provided with O-ring seal between this sensor and the seal chamber; Annular seal space is equipped with the hydraulic loaded cylinder near the force transducer side, and the piston rod of this hydraulic loaded cylinder leans force transducer, in this hydraulic loaded cylinder O-ring seal is set; The other end of hydraulic loaded cylinder is connected with the cavity that leaks hunting, and this cavity that leaks hunting is provided with minute-pressure difference measurements instrument; The main shaft of driven by motor extend in the annular seal space, axle sleeve is sleeved on the main shaft, this axle sleeve bottom is reverse thread with main shaft and is connected, thereby tested mechanical seal workpiece is fitted between axle sleeve termination and the force transducer, the stationary seat of mechanical seal workpiece is fixed on the force transducer, between stationary seat and the force transducer O-ring seal is set, the jut of outer, axle sleeve termination is embedded into the sealing work end and covers and stop in the groove; At a place of leaking hunting, settle load sensor; Vialog is installed at the bearing seat place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00220907 CN2428764Y (en) | 2000-07-03 | 2000-07-03 | Mechanical sealing test apparatus with controllable spring specific-pressure and measurable vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00220907 CN2428764Y (en) | 2000-07-03 | 2000-07-03 | Mechanical sealing test apparatus with controllable spring specific-pressure and measurable vibration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2428764Y true CN2428764Y (en) | 2001-05-02 |
Family
ID=33585873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00220907 Expired - Fee Related CN2428764Y (en) | 2000-07-03 | 2000-07-03 | Mechanical sealing test apparatus with controllable spring specific-pressure and measurable vibration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2428764Y (en) |
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| CN102175370A (en) * | 2011-03-04 | 2011-09-07 | 青岛开世密封工业有限公司 | Friction torque testing machine and method thereof for testing friction torque of rotary shaft lip seal ring |
| CN102183327A (en) * | 2011-02-23 | 2011-09-14 | 南京林业大学 | Mechanical seal face friction torque measurement method |
| CN102589821A (en) * | 2012-02-20 | 2012-07-18 | 南京林业大学 | Novel mechanical sealing performance testing apparatus |
| CN102680175A (en) * | 2012-04-27 | 2012-09-19 | 大连华阳光大密封有限公司 | Contact high-speed mechanical seal testing device |
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| CN106571313A (en) * | 2016-10-31 | 2017-04-19 | 北京七星华创电子股份有限公司 | Device and method for detecting state of technological door of semiconductor heat treatment equipment |
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| CN109752141A (en) * | 2019-01-30 | 2019-05-14 | 北京星际荣耀空间科技有限公司 | A kind of mechanical seal product testing processing unit (plant) and method |
| CN110411670A (en) * | 2019-08-29 | 2019-11-05 | 中国南方电网有限责任公司超高压输电公司昆明局 | A kind of single end face unbalanced type mechanical seal leakage detection apparatus |
| CN111024375A (en) * | 2019-11-19 | 2020-04-17 | 中国矿业大学 | Test system for simulating mechanical sealing performance under severe working conditions |
| CN111238741A (en) * | 2020-03-25 | 2020-06-05 | 九江心连心化肥有限公司 | Mechanical seal detection device and flushing detection process |
| CN112763120A (en) * | 2020-12-31 | 2021-05-07 | 合肥通用机械研究院有限公司 | Mechanical seal elasticity online adjustment testing arrangement |
| CN112903013A (en) * | 2021-01-20 | 2021-06-04 | 中核核电运行管理有限公司 | Method for detecting mechanical seal torque and leakage rate of loading and unloading machine |
| CN114279610A (en) * | 2021-12-06 | 2022-04-05 | 北京航天动力研究所 | Device and method for measuring specific pressure of mechanical seal end face of turbopump of liquid rocket engine |
-
2000
- 2000-07-03 CN CN 00220907 patent/CN2428764Y/en not_active Expired - Fee Related
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| CN102183327B (en) * | 2011-02-23 | 2013-01-23 | 南京林业大学 | Mechanical seal face friction torque measurement method |
| CN102183327A (en) * | 2011-02-23 | 2011-09-14 | 南京林业大学 | Mechanical seal face friction torque measurement method |
| CN102175370A (en) * | 2011-03-04 | 2011-09-07 | 青岛开世密封工业有限公司 | Friction torque testing machine and method thereof for testing friction torque of rotary shaft lip seal ring |
| CN102175370B (en) * | 2011-03-04 | 2012-12-05 | 青岛开世密封工业有限公司 | Friction torque testing method for testing friction torque of rotary shaft lip seal ring |
| CN102589821A (en) * | 2012-02-20 | 2012-07-18 | 南京林业大学 | Novel mechanical sealing performance testing apparatus |
| CN102589821B (en) * | 2012-02-20 | 2014-07-02 | 南京林业大学 | Novel mechanical sealing performance testing apparatus |
| CN102680175A (en) * | 2012-04-27 | 2012-09-19 | 大连华阳光大密封有限公司 | Contact high-speed mechanical seal testing device |
| CN102879189A (en) * | 2012-09-28 | 2013-01-16 | 南京林业大学 | Non-metallic O-shaped ring performance testing device |
| CN102879189B (en) * | 2012-09-28 | 2014-11-12 | 南京林业大学 | Non-metallic O-shaped ring performance testing device |
| CN103267613A (en) * | 2013-05-06 | 2013-08-28 | 南京林业大学 | Mechanical seal performance testing device |
| CN103267613B (en) * | 2013-05-06 | 2015-08-19 | 南京林业大学 | A kind of mechanical sealing performance tester |
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| CN105704635A (en) * | 2016-03-31 | 2016-06-22 | 歌尔声学股份有限公司 | Microphone vibration testing jig |
| CN106571313A (en) * | 2016-10-31 | 2017-04-19 | 北京七星华创电子股份有限公司 | Device and method for detecting state of technological door of semiconductor heat treatment equipment |
| CN107063668A (en) * | 2017-05-17 | 2017-08-18 | 西安交通大学 | A kind of dry gas seals experimental system suitable for multi-state |
| CN107063668B (en) * | 2017-05-17 | 2019-01-18 | 西安交通大学 | A kind of dry gas seals experimental system suitable for multi-state |
| CN109752141A (en) * | 2019-01-30 | 2019-05-14 | 北京星际荣耀空间科技有限公司 | A kind of mechanical seal product testing processing unit (plant) and method |
| CN110411670A (en) * | 2019-08-29 | 2019-11-05 | 中国南方电网有限责任公司超高压输电公司昆明局 | A kind of single end face unbalanced type mechanical seal leakage detection apparatus |
| CN111024375A (en) * | 2019-11-19 | 2020-04-17 | 中国矿业大学 | Test system for simulating mechanical sealing performance under severe working conditions |
| CN111238741A (en) * | 2020-03-25 | 2020-06-05 | 九江心连心化肥有限公司 | Mechanical seal detection device and flushing detection process |
| CN112763120A (en) * | 2020-12-31 | 2021-05-07 | 合肥通用机械研究院有限公司 | Mechanical seal elasticity online adjustment testing arrangement |
| CN112903013A (en) * | 2021-01-20 | 2021-06-04 | 中核核电运行管理有限公司 | Method for detecting mechanical seal torque and leakage rate of loading and unloading machine |
| CN114279610A (en) * | 2021-12-06 | 2022-04-05 | 北京航天动力研究所 | Device and method for measuring specific pressure of mechanical seal end face of turbopump of liquid rocket engine |
| CN114279610B (en) * | 2021-12-06 | 2023-07-14 | 北京航天动力研究所 | Device and method for measuring specific pressure of mechanical seal end face of turbopump of liquid rocket engine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |