CN103759942B - Water lubriucated bearing testing table - Google Patents
Water lubriucated bearing testing table Download PDFInfo
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- CN103759942B CN103759942B CN201410040371.2A CN201410040371A CN103759942B CN 103759942 B CN103759942 B CN 103759942B CN 201410040371 A CN201410040371 A CN 201410040371A CN 103759942 B CN103759942 B CN 103759942B
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- water lubriucated
- rotating shaft
- lubriucated bearing
- bearings
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Abstract
The invention belongs to water lubriucated bearing experiment detection device, be specifically related to a kind of water lubriucated bearing testing table, comprise the seal casinghousing that testing table support is arranged, two water lubriucated bearings are provided with in described seal casinghousing, a rotating shaft is provided with in the center pit of described two water lubriucated bearings, described rotating shaft and electric machine main shaft connect and compose drive end, described seal casinghousing is provided with apopore and inlet opening, described rotating shaft is coaxially provided with multiple discoid load, the side face side of described rotating shaft is provided with rotating shaft radial displacement detecting unit.The present invention can Reality simulation load and dry, wet rotor operating mode, the radial displacement of water lubriucated bearing shaft is detected in real time simultaneously, by measuring shutdown process axes movement locus under various operational parameters, judge the dynamic lubrication of mixed film friction, Part EHL and perfect elasticity hydrldynamic pressure lubrication state, disclosing the basic reason of journal wear, providing theoretical foundation for controlling wearing and tearing.
Description
Technical field
The invention belongs to water lubriucated bearing experiment detection device, be specifically related to a kind of water lubriucated bearing testing table.
Background technology
The lubricant medium of water lubriucated bearing is water, has cost low, environment friendly and pollution-free, and therefore the advantages such as anti-attrition is energy-conservation, good flame resistance one are used widely.Water lubriucated bearing also applies on all kinds of pump gradually, and particularly the use of large-scale desalinization high-pressure pump water lubriucated bearing, significantly simplify complete machine structure, improves the efficiency of pump.
Due to the greasy property of water and oil phase poor, the bearing capacity of moisture film, vibration absorption ability and damping are all much lower than oil film, and its difficulty forming hydrodynamic lubrication is comparatively large, and therefore its bearing rotor system stability problem brought is also fairly obvious.The particularly excentricity of water lubriucated bearing axle journal and attitude angle transient changing in unit starting and stopping process, bearing shell is often in dry friction and boundary friction state, easily causes the system instability such as bearing bush abrasion, rotor oscillation.In severe case, axle journal and bearing shell may be killed, and cause system-down.Even if under stabilized (steady-state) speed operating mode, the unbalanced load caused due to rotor foozle also can bring impact to its system stability.
But current techniques has many incomplete places for the design of water lubriucated bearing testing table with test.Such as patent name is water lubriucated bearing and kinematic train comprehensive characteristic test platform (application number: 201110119766.8, the applying date: 2011.05.10) patent of invention disclose a kind of water lubriucated bearing testing table, mainly comprise drive unit, charger and pick-up unit, this water lubriucated bearing testing table can only detect every operational factor of water lubriucated bearing separately, the load of Simulated Water lubricating bearings that can not be truly complete and rotor coupling system and actual operating mode.Therefore, need to design a kind of can Reality simulation load and dry, wet rotor operating mode have the water lubriucated bearing testing table of perfect measuring system.
Summary of the invention
The object of this invention is to provide a kind of can Reality simulation load and dry, wet rotor operating mode and also can measure water lubricating bearings at the water lubriucated bearing testing table of practical work process shaft radial offset.
For achieving the above object, the invention provides following technical scheme: a kind of water lubriucated bearing testing table, comprise the seal casinghousing that testing table support is arranged, be provided with two in described seal casinghousing coaxially to arrange and the water lubriucated bearing of axis horizontal setting, a rotating shaft is provided with in the center pit of described two water lubriucated bearings, described rotating shaft and water lubriucated bearing form gap and are rotatably assorted, one end of described rotating shaft extends to seal casinghousing outside and connects and composes drive end with electric machine main shaft synchronous axial system, described seal casinghousing is provided with apopore and inlet opening, the axis body of described rotating shaft between two water lubriucated bearings is coaxially provided with one or more discoid loads, described discoid load is connected with rotating shaft synchronous axial system, the side face side of described rotating shaft is close to two water lubriucated bearing positions and is provided with rotating shaft radial displacement detecting unit.
Technique effect of the present invention is: the time of day of the multistage pumps such as Reality simulation load and dry, wet rotor, the radial displacement of water lubriucated bearing shaft is detected in real time simultaneously, by measuring shutdown process axes movement locus under various operational parameters, draw minimum water film thickness isoline, introduce Film Thickness Ratio, judge the dynamic lubrication of mixed film friction, Part EHL and perfect elasticity hydrldynamic pressure lubrication state, grasp the lubricating status of water lubriucated bearing, disclosing the basic reason of journal wear, providing theoretical foundation for controlling wearing and tearing.
Accompanying drawing explanation
Fig. 1 is cut-open view of final assembly of the present invention;
Fig. 2 is the A-A cut-open view of Fig. 1.
Embodiment
As shown in Figure 1, a kind of water lubriucated bearing testing table, comprise the seal casinghousing that testing table support 11 is arranged, be provided with two in described seal casinghousing coaxially to arrange and the water lubriucated bearing 20 of axis horizontal setting, a rotating shaft 30 is provided with in the center pit of described two water lubriucated bearings 20, described rotating shaft 30 forms gap with water lubriucated bearing 20 and is rotatably assorted, one end of described rotating shaft 30 extends to seal casinghousing outside and connects and composes drive end with electric machine main shaft 40 synchronous axial system, described seal casinghousing is provided with apopore and inlet opening, the axis body of described rotating shaft 30 between two water lubriucated bearings 20 is coaxially provided with one or more discoid loads 31, described discoid load 31 is connected with rotating shaft 30 synchronous axial system, the side face side of described rotating shaft 30 is close to two water lubriucated bearing 20 positions and is provided with rotating shaft radial displacement detecting unit.Rotating shaft 30 is arranged between two water lubriucated bearings 20 by the mode that the present invention is supported by two ends, simultaneously in rotating shaft 30, apply load 31 and to utilize seal casinghousing to build dry, wet two kinds of different working environments, the real work state of multistage pump rotor and water lubriucated bearing is simulated with this, in addition, quantity by changing discoid load 31 carrys out the size of regulating load, rotating shaft 30 radial displacement recorded like this and rotating shaft 30 deviating track are just more close to the real trace under actual condition, greatly improve the reference value of water lubriucated bearing testing table data measured.
As shown in Figure 1, a tubular shell 70 is provided with between described two water lubriucated bearings 20, two opening part end faces of affiliated tubular shell 70 are connected with the butt-end packing of two water lubriucated bearings 20 respectively, the end face outside being positioned at the water lubriucated bearing 20b of rotating shaft 30 drive end side is outwards provided with one section of tubular protrusions in the axial direction, the internal diameter of described tubular protrusions is greater than the diameter of water lubriucated bearing 20 center pit, mechanical seal 23 is provided with between the projecting end inner ring surface of described tubular protrusions and rotating shaft 30, the end face outside being positioned at the water lubriucated bearing 20a of rotating shaft 30 anti-drive end is provided with end cap 24, described tubular shell 70, end cap 24, the outer ring surface of mechanical seal 23 and water lubriucated bearing 20 forms seal casinghousing jointly.Tubular shell 70 is just equivalent to the shell of multistage pump, and said structure simulates the real structure of multistage pump to the full extent, further ensure that the accuracy that testing result judges water lubriucated bearing and rotor coupling system.
As shown in Figure 1, 2, described end cap 24 is provided with anti-drive end limbers 241, described tubulose is provided with drive end limbers 25 along the sidewall of extending portion, described tubular shell 70 is provided with total inlet opening 71, the lowest part barrel of described tubular shell 70 is provided with total apopore 72, and described total apopore 72 is provided with plug.When testing staff needs the duty simulating dry rotor, plug on total apopore 72 need be opened, then from drive end limbers 25 and anti-drive end limbers 241, two water lubriucated bearings 20 are supplied water, current penetrate in the radial play between rotating shaft 30 and water lubriucated bearing 20 and form liquid film, then overflow from water lubriucated bearing 20 other end, finally flow out from total apopore, this ensures that thering rotating shaft 30 and load 31 is in dry room environmental, simulating the running status of multistage pump when dallying.When simulating the duty of wet rotor, first the plug of total apopore 72 is blocked, then supply water in seal casinghousing from total inlet opening 71, current finally can be full of whole chamber, radial play between water leaking-in lubricating bearings 20 and rotating shaft 30 can form liquid film simultaneously, unnecessary current can flow out from drive end limbers 25 and anti-drive end limbers 241 thus play effect chamber being carried out to pressure release, so just simulate the duty of multistage pump in actual pump water process.
As shown in Figure 1, 2, described rotating shaft radial displacement detecting unit comprises two groups of eddy current displacement sensors 61 being close to two water lubriucated bearings 20 respectively and arranging, and often organizes eddy current displacement sensor 61 and comprises along rotating shaft 30 two orthogonal eddy current displacement sensor 61a, 61b circumferentially.Often organize eddy current displacement sensor 61 can detect the radial displacement of the rotating shaft 30 of water lubriucated bearing 20 side respectively, the radial displacement of the rotating shaft 30 of this position is also just similar to the radial displacement with the rotating shaft 30 being positioned at water lubriucated bearing 20 inside, often comprise two mutual vertically arranged eddy current displacement sensor 61a, 61b in group, this makes it possible to the displacement of countershaft 30 in X, Y both direction detect, and then the radial displacement track of rotating shaft 30 can be drawn out.
As shown in Figure 2, described orthogonal two current vortex sensors 61a, 61b are the oblique first half being arranged in tubular shell 70.All be provided with static seal with end face inside sensor support cover 74, can prevent current from oozing out from the gap of sensor installation seat like this.
For convenience of speed governing so motor used in the present invention is variable-frequency motor, described rotating shaft 30 is connected by spring coupling 50 with the main shaft 40 of motor.
Claims (4)
1. a water lubriucated bearing testing table, it is characterized in that: comprise the upper seal casinghousing arranged of testing table support (11), be provided with two in described seal casinghousing coaxially to arrange and the water lubriucated bearing (20) of axis horizontal setting, a rotating shaft (30) is provided with in the center pit of described two water lubriucated bearings (20), described rotating shaft (30) and water lubriucated bearing (20) form gap and are rotatably assorted, one end of described rotating shaft (30) extends to seal casinghousing outside and connects and composes drive end with electric machine main shaft (40) synchronous axial system, described seal casinghousing is provided with apopore and inlet opening, described rotating shaft (30) is positioned on the axis body between two water lubriucated bearings (20) and is coaxially provided with one or more discoid loads (31), described discoid load (31) is connected with rotating shaft (30) synchronous axial system, the side face side of described rotating shaft (30) is close to two water lubriucated bearings (20) position and is provided with rotating shaft radial displacement detecting unit,
A tubular shell (70) is provided with between described two water lubriucated bearings (20), two opening part end faces of described tubular shell (70) are connected with the butt-end packing of two water lubriucated bearings (20) respectively, the end face outside being positioned at the water lubriucated bearing (20b) of rotating shaft (30) drive end side is outwards provided with one section of tubular protrusions in the axial direction, the internal diameter of described tubular protrusions is greater than the diameter of water lubriucated bearing (20) center pit, mechanical seal (23) is provided with between the projecting end inner ring surface of described tubular protrusions and rotating shaft (30), the end face outside being positioned at the water lubriucated bearing (20a) of rotating shaft (30) anti-drive end is provided with end cap (24), described tubular shell (70), end cap (24), the outer ring surface of mechanical seal (23) and water lubriucated bearing (20) forms seal casinghousing jointly,
Described end cap (24) is provided with anti-drive end limbers (241), the sidewall of described tubular protrusions is provided with drive end limbers (25), described tubular shell (70) is provided with total inlet opening (71), the lowest part barrel of described tubular shell (70) is provided with total apopore (72), and described total apopore (72) is provided with plug.
2. water lubriucated bearing testing table according to claim 1, it is characterized in that: described rotating shaft radial displacement detecting unit comprises two groups of eddy current displacement sensors (61) being close to two water lubriucated bearings (20) respectively and arranging, often organizing eddy current displacement sensor (61) comprises along rotating shaft (30) two orthogonal eddy current displacement sensors (61a, 61b) circumferentially, and described two groups of eddy current displacement sensors (61) are close to the setting of two water lubriucated bearings (20) respectively.
3. water lubriucated bearing testing table according to claim 2, is characterized in that: described orthogonal two current vortex sensors (61a, 61b) are in the oblique first half being arranged in tubular shell (70).
4. the water lubriucated bearing testing table according to claim 1 or 3, is characterized in that: described motor is variable-frequency motor, and described rotating shaft (30) is connected by spring coupling (50) with the main shaft (40) of motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410040371.2A CN103759942B (en) | 2014-01-27 | 2014-01-27 | Water lubriucated bearing testing table |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410040371.2A CN103759942B (en) | 2014-01-27 | 2014-01-27 | Water lubriucated bearing testing table |
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| CN103759942A CN103759942A (en) | 2014-04-30 |
| CN103759942B true CN103759942B (en) | 2016-03-30 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064098A (en) * | 2014-05-08 | 2014-09-24 | 浙江工业大学 | Multifunctional fluid dynamic pressure lubricating demonstration instrument |
| CN109269803B (en) * | 2018-10-10 | 2021-01-22 | 洛阳轴承研究所有限公司 | Bearing test device |
| CN110220705A (en) * | 2019-06-14 | 2019-09-10 | 人本集团有限公司 | Bearing centrifugal test platform |
| CN111197581A (en) * | 2020-02-24 | 2020-05-26 | 上海城市排水设备制造安装工程有限公司 | Assembly for detecting abrasion of guide bearing of water pump |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4065956A (en) * | 1975-05-09 | 1978-01-03 | Siemens Aktiengesellschaft | Variable load, high vacuum shaft bearing test apparatus |
| CN201203522Y (en) * | 2008-04-30 | 2009-03-04 | 哈尔滨电机厂有限责任公司 | Water lubricating radial bearing test device |
| CN201203521Y (en) * | 2008-04-30 | 2009-03-04 | 哈尔滨电机厂有限责任公司 | Water lubricating thrust bearing test device |
| CN201378104Y (en) * | 2009-04-08 | 2010-01-06 | 南京工程学院 | In-shaft inertia disc loading device |
| CN101876590A (en) * | 2009-12-04 | 2010-11-03 | 华中科技大学 | Comprehensive performance test table for water-lubricated dynamic-static pressure radial sliding bearing |
| CN102269654A (en) * | 2011-05-10 | 2011-12-07 | 重庆大学 | Water lubricated bearing and transmission system comprehensive performance testing platform |
| CN102607846A (en) * | 2012-03-08 | 2012-07-25 | 江苏大学 | Comprehensive test stand for water-lubricated bearings for pumps |
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2014
- 2014-01-27 CN CN201410040371.2A patent/CN103759942B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4065956A (en) * | 1975-05-09 | 1978-01-03 | Siemens Aktiengesellschaft | Variable load, high vacuum shaft bearing test apparatus |
| CN201203522Y (en) * | 2008-04-30 | 2009-03-04 | 哈尔滨电机厂有限责任公司 | Water lubricating radial bearing test device |
| CN201203521Y (en) * | 2008-04-30 | 2009-03-04 | 哈尔滨电机厂有限责任公司 | Water lubricating thrust bearing test device |
| CN201378104Y (en) * | 2009-04-08 | 2010-01-06 | 南京工程学院 | In-shaft inertia disc loading device |
| CN101876590A (en) * | 2009-12-04 | 2010-11-03 | 华中科技大学 | Comprehensive performance test table for water-lubricated dynamic-static pressure radial sliding bearing |
| CN102269654A (en) * | 2011-05-10 | 2011-12-07 | 重庆大学 | Water lubricated bearing and transmission system comprehensive performance testing platform |
| CN102607846A (en) * | 2012-03-08 | 2012-07-25 | 江苏大学 | Comprehensive test stand for water-lubricated bearings for pumps |
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