CN104142215A - Reciprocating type shaft seal sealing performance testing method and device - Google Patents
Reciprocating type shaft seal sealing performance testing method and device Download PDFInfo
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Abstract
本发明公开了一种往复式轴封密封性能的测试方法及其装置，所述的装置包括试验台架、外筒、安装密封圈的密封圈安装环、密封主轴、拉压传感器、托块、往复直线运动装置、辅助装置以及检测装置，所述的外筒通过支架固设在所述的试验台架上，所述的检测装置和所述的辅助装置分别与设置在所述的外筒上的孔连接；所述的密封圈安装环安装在所述的外筒内，所述的外筒的两端通过端盖将所述的密封圈安装环压紧密封；所述的密封主轴安装在所述的外筒内且通过联轴器与所述的拉压传感器相连接；所述的拉压传感器与所述的托块连接，所述的托块与所述的往复直线运动装置连接；所述的往复直线运动装置、拉压传感器和辅助装置均与数据采集控制系统电连接。
The invention discloses a method and a device for testing the sealing performance of a reciprocating shaft seal. The device includes a test bench, an outer cylinder, a sealing ring installation ring for installing a sealing ring, a sealing spindle, a tension and pressure sensor, a bracket, A reciprocating linear motion device, an auxiliary device and a detection device, the outer cylinder is fixed on the test bench through a bracket, and the detection device and the auxiliary device are respectively arranged on the outer cylinder The holes are connected; the sealing ring installation ring is installed in the outer cylinder, and the two ends of the outer cylinder press and seal the sealing ring installation ring through the end cover; the sealing main shaft is installed in the The outer cylinder is connected to the tension-pressure sensor through a coupling; the tension-pressure sensor is connected to the support block, and the support block is connected to the reciprocating linear motion device; The reciprocating linear motion device, tension and pressure sensor and auxiliary device are all electrically connected with the data acquisition control system.
Description
Technical field
The method of testing and the device thereof that the present invention relates to a kind of sliding-contact packing sealing property, belong to fluid seals technology research field.
Background technology
Sealing Technology has become and has ensured long-term, the requisite important technology of safety and stability of modern industry.In general, sealing can be divided into the large class of motive seal two between static seal and the relative motion composition surface between relative stationary engagement face.Reciprocating shaft seal is typical motive seal, is widely used in internal combustion engine, hydraulic pressure or pneumatic linear actuator; A large amount of reciprocating pump and the compressors that use of oil refining and landification equipment all use various piston seals and piston rod packing.The leakage of sliding-contact packing sealing medium not only can cause huge economic loss, but also can cause the serious consequences such as environmental pollution, decrease in efficiency and personal injury, therefore the normal operation of its sealing property to equipment and the aspect such as cost-saving play vital effect.
At present, the detection for sliding-contact packing sealing property in engineering often has hysteresis quality, the effectively test detecting equipment to seal and sealing system of shortage, and existing testing equipment specific aim is not strong yet.
Summary of the invention
There is the shortcomings such as hysteresis quality, specific aim are not strong in order to overcome the detection existing in the checkout equipment of existing sliding-contact packing sealing property, the invention provides a kind of can be conveniently to the sealing property of the various typical sliding-contact packings such as hydraulic seal and pneumostop under different medium and pressure medium test, the actual working state of simulation and shaft seal is close, measuring accuracy is high, test findings accurately and reliably, method of testing and the device thereof of favorable repeatability and the high sliding-contact packing sealing property of automaticity.
The technical solution used in the present invention is:
A method of testing for sliding-contact packing sealing property, is characterized in that: described method of testing comprises the steps:
A, O-ring seal is arranged on out on fluted O-ring seal installing ring, O-ring seal installing ring is contained in urceolus and compresses by the end cap at urceolus two ends; In urceolus, installation seals main shaft and will seal main shaft by shaft coupling and is connected with tension-compression sensor, and tension-compression sensor is connected with tray; Tray moves along the slide rail on tray support, and power is provided by horizontal reciprocating movement device;
B, data acquisition control system control servicing unit and reciprocal horizontal movement device, make between two shaft seals, to be full of the test(ing) medium with pressure and make to seal main shaft to complete the linear reciprocating motion of setting;
The frictional force data of c, tension-compression sensor Real-time Collection shaft seal also reaches data acquisition control system; Leakage detection apparatus detects the leakage rate of test(ing) medium in sliding-contact packing operational process, to obtain the sealing property of sliding-contact packing.
Be exclusively used in the test unit of test method described above, it is characterized in that: the O-ring seal installing ring, sealing main shaft, tension-compression sensor, tray, straight reciprocating motion apparatus, servicing unit and the pick-up unit that comprise test-bed, urceolus, installation O-ring seal, described urceolus is installed on described test-bed by support, and described pick-up unit is connected with the hole being arranged on described urceolus respectively with described servicing unit; Described O-ring seal installing ring is arranged in described urceolus, the two ends of described urceolus by end cap by described O-ring seal installing ring press seal; Described sealing main shaft is arranged in described urceolus and is connected with described tension-compression sensor by shaft coupling; Described tension-compression sensor is connected with described tray, and described tray is connected with described straight reciprocating motion apparatus; Described straight reciprocating motion apparatus, tension-compression sensor and servicing unit are all electrically connected with data acquisition control system.
Further, on described urceolus, have the drainage trough of ring-type near the position of O-ring seal installing ring; Have the first perforate that the convenient liquid medium leaking flows out in the left and right sides, bottom of urceolus, offer respectively the second perforate that connects described servicing unit at the place of relative position up and down of urceolus.Like this, the medium leaking out can flow in drainage trough smoothly, and is pooled to the first perforate of urceolus bottom, derives by the groove on end cap, has ensured that the medium of leakage can all successfully be collected in leakage detection apparatus, has ensured the accuracy of measuring.
Further, during for hydraulic seal test, described servicing unit comprises liquid conduits, ebullator, fluid reservoir and compressor, one end of described liquid conduits is communicated with the second perforate on urceolus, the other end is connected with ebullator, ebullator is connected with the bottom of fluid reservoir, and the top of fluid reservoir is connected with compressor, and the second perforate on the urceolus relative with liquid conduits setting position of the top of fluid reservoir is communicated with; Described pick-up unit comprises catheter and leakage fluid measuring cup, and described leakage fluid measuring cup is stretched in described catheter one end, and the other end is communicated with the first perforate on urceolus.
Further, while test for pneumostop, described pick-up unit comprises suction gun, wireway and helium mass spectrometer leak detector, and one end of described wireway connects described helium mass spectrometer leak detector, and the other end is communicated with the first perforate on urceolus; Described servicing unit comprises gas conduit, pressure governor and helium tank, described suction gun is arranged on the openend of described helium tank, one end of described gas conduit is communicated with the second perforate on urceolus, the other end connects described pressure governor, and described pressure governor connects described suction gun; The second perforate on the urceolus relative with the other end setting position of gas conduit adopts nut seal.
Further, described straight reciprocating motion apparatus comprises electric rotating machine and toggle, described electric rotating machine is fixed on described test-bed, the turning axle of described electric rotating machine is connected with one end of described toggle, and the other end of described toggle connects described tray.
Further, described end cap is bolted on urceolus by first, and the top of described end cap is arranged at intervals with the medium of guarantee leakage can collect the groove in leakage detection apparatus smoothly.
Further, on described O-ring seal installing ring, offer the groove of O-ring seal is installed, and between described O-ring seal installing ring and urceolus, install and be equipped with the O shape rubber seal that prevents dielectric leakage.The installation of O shape rubber seal can prevent that medium is from this leakage, the accuracy of warranty test result.On O-ring seal installing ring, the form of groove is variable, and multi-form reciprocal shaft seal can be installed.Like this, can carry out the test of sealing property to the various typical back and forth shaft seal of hydraulic seal and pneumostop.
Further, described tray is arranged on described test-bed by tray support, on described tray support, is provided with slide rail, and described tray can move along described slide rail; Described tray is connected with tension-compression sensor by the second bolt.
Further, the two ends of described shaft coupling are threaded with described sealing main shaft and tension-compression sensor respectively, and are provided with set nut between described shaft coupling and sealing main shaft and tension-compression sensor.Like this, can ensure to be connected firmly between parts, guarantee the accuracy of drive system, make to seal main shaft and move back and forth by predetermined displacement amplitude.
Using method of the present invention and the course of work thereof are as follows:
O-ring seal is arranged on out on fluted O-ring seal installing ring, and O-ring seal installing ring packs in urceolus; Then, sealing main shaft is installed, two ends end cap compresses O-ring seal installing ring; Sealing main shaft right side connects shaft coupling, tension-compression sensor and tray successively, and tray is connected with horizontal reciprocating movement device; Then, servicing unit and leakage detection apparatus are installed to corresponding position; Tension-compression sensor, servicing unit and reciprocal horizontal movement device are all electrically connected with data acquisition control system; Afterwards, data acquisition control system level of control reciprocator and servicing unit, make to be full of between shaft seal the sealing medium with preset pressure, and sealing main shaft moves back and forth according to the main shaft of setting; In process of the test, the friction force that tension-compression sensor can synchronous acquisition shaft seal also outputs to data acquisition control system, and leakage detection apparatus detects the leakage rate of process of the test medium.
Servicing unit can be realized the test of the sealing property of hydraulic seal and pneumostop; The change of groove form can be tested various typical sliding-contact packings; Leakage detection apparatus has different devices for hydraulic seal and pneumostop, the leakage rate of energy Measurement accuracy medium; Test findings accurately and reliably, favorable repeatability.
Compared with prior art, the invention has the beneficial effects as follows:
One, the groove form in the present invention is variable, can test the various typical shaft seal of hydraulic seal and pneumostop; Test(ing) medium pressure and kind are adjustable, thereby can simulate more accurately the sealing property of shaft seal in different running environment.
Two,, while test, by the reciprocating movement displacement of data acquisition control system control seal shaft, read the related datas such as friction force, and dielectric leakage amount is detected; Simple to operation, automaticity is high, and the personal error of test is little, and result accurately, reliably.
Three, for hydraulic seal and pneumostop, adopt multi-form leakage amount measuring device for electricity and measuring method, thus the leakage rate of the various media of Measurement accuracy targetedly.
Four, the present invention can test for the sealing property of multi-form shaft seal, and can control easily the reciprocating movement displacement of sealing main shaft, the axial force in Measurement accuracy shaft seal operational process; Servicing unit can be controlled pressure and the type of sealing medium, and leakage detection apparatus can accurately detect the leakage rate in shaft seal operational process; Experiment automatized degree is high, result accurately and reliably, favorable repeatability.
Brief description of the drawings
Fig. 1 a is the main TV structure schematic diagram of the hydraulic seal test unit of the embodiment of the present invention 1.
Fig. 1 b is I place enlarged drawing in Fig. 1 a.
Fig. 1 c is II place enlarged drawing in Fig. 1 a.
Fig. 2 is the main TV structure schematic diagram of the pneumostop test unit of the embodiment of the present invention 2.
Fig. 3 a, Fig. 3 b, Fig. 3 c, Fig. 3 d are the structural representations of hydraulic seal typical combination sealing.
Fig. 4 a, Fig. 4 b, Fig. 4 c, Fig. 4 d are the structural representations of typical elastic body pneumatic piston sealing.
Fig. 5 a is the structural representation of the end cap of the embodiment of the present invention.
Fig. 5 b is the side view of Fig. 5 a.
Fig. 6 is that tray of the present invention coordinates schematic diagram with slide rail.
Embodiment
Embodiment 1
With reference to Fig. 1 a, 1b, 1c, Fig. 3 a～Fig. 3 d, Fig. 5 a to Fig. 6, a kind of method of testing of sliding-contact packing sealing property, described method of testing comprises the steps:
A, O-ring seal 9 is arranged on out on fluted O-ring seal installing ring 5, O-ring seal installing ring 5 is contained in urceolus 8 and compresses by the end cap 4 at urceolus 8 two ends; At the interior installation of urceolus 8 sealing main shaft 7 and will seal main shaft 7 by shaft coupling 12 and be connected with tension-compression sensor 14, tension-compression sensor 14 is connected with tray 15; Tray 15 moves along the slide rail 18 on tray support 17, and power is provided by horizontal reciprocating movement device 21;
B, data acquisition control system control servicing unit and reciprocal horizontal movement device 21, make between two shaft seals, to be full of the test(ing) medium with pressure and make to seal main shaft 7 to complete the linear reciprocating motion of setting;
The frictional force data of c, tension-compression sensor 14 Real-time Collection shaft seals also reaches data acquisition control system; Leakage detection apparatus detects the leakage rate of test(ing) medium in sliding-contact packing operational process, to obtain the sealing property of sliding-contact packing.
Be exclusively used in the test unit of test method described above, comprise O-ring seal installing ring 5, sealing main shaft 7, tension-compression sensor 14, tray 15, straight reciprocating motion apparatus 21, servicing unit and the pick-up unit of test-bed 1, urceolus 8, installation O-ring seal 9, described urceolus 8 is installed on described test-bed 1 by support 2,6, and described pick-up unit is connected with the hole being arranged on described urceolus 8 respectively with described servicing unit; Described O-ring seal installing ring 5 is arranged in described urceolus 8, and end cap 4 is passed through by described O-ring seal installing ring 5 press seals in the two ends of described urceolus 8; Described sealing main shaft 7 is arranged in described urceolus 8 and is connected with described tension-compression sensor 14 by shaft coupling 12; Described tension-compression sensor 14 is connected with described tray 15, and described tray 15 is connected with described straight reciprocating motion apparatus 21; Described straight reciprocating motion apparatus 21, tension-compression sensor 14 and servicing unit are all electrically connected with data acquisition control system.
Further, on described urceolus 8, have the drainage trough 8A of ring-type near the position of O-ring seal installing ring 5; Have the first perforate that the convenient liquid medium leaking flows out in the left and right sides, bottom of urceolus 8, offer respectively the second perforate that connects described servicing unit at the place of relative position up and down of urceolus.Like this, the medium leaking out can flow in drainage trough 8A smoothly, and is pooled to the first perforate of urceolus bottom, derives by groove 4A, 4B on end cap 4,4C, the medium that has ensured leakage can all successfully be collected in leakage detection apparatus, has ensured the accuracy of measuring.
During for hydraulic seal test, described servicing unit comprises liquid conduits 24A, ebullator 25A, fluid reservoir 26A and compressor 27A, one end of described liquid conduits 24A is communicated with the second perforate on urceolus 8, the other end is connected with ebullator 25A, ebullator 25A is connected with the bottom of fluid reservoir 26A, the top of fluid reservoir 26A is connected with compressor 27A, and the second perforate on the urceolus relative with liquid conduits setting position of the top of fluid reservoir 26A is communicated with; Described pick-up unit comprises catheter 23A and leakage fluid measuring cup 22A, and described leakage fluid measuring cup 22A is stretched in described catheter 23A one end, and the other end is communicated with the first perforate on urceolus 8.
Further, described straight reciprocating motion apparatus 21 comprises electric rotating machine 20 and toggle 19, described electric rotating machine 20 is fixed on described test-bed 1, the turning axle of described electric rotating machine 20 is connected with one end of described toggle 19, and the other end of described toggle connects described tray 15.
Further, described end cap 4 is fixed on urceolus 8 by the first bolt 3, and the top of described end cap 4 is arranged at intervals with the medium of guarantee leakage can collect groove 4A, 4B, the 4C in leakage detection apparatus smoothly.
Further, on described O-ring seal installing ring 5, offer the groove of O-ring seal 9 is installed, and between described O-ring seal installing ring 5 and urceolus 8, install and be equipped with the O shape rubber seal 10 that prevents dielectric leakage.The installation of O shape rubber seal 10 can prevent that medium is from this leakage, the accuracy of warranty test result.On O-ring seal installing ring 5, the form of groove is variable, and multi-form reciprocal shaft seal can be installed.Like this, can carry out the test of sealing property to the various typical back and forth shaft seal of hydraulic seal and pneumostop.
Further, described tray 15 is arranged on described test-bed 1 by tray support 17, on described tray support 17, is provided with slide rail 18, and described tray 15 can move along described slide rail 18; Described tray 15 is connected with tension-compression sensor 14 by the second bolt 16.
Further, the two ends of described shaft coupling 12 are threaded with described sealing main shaft 7 and tension-compression sensor 14 respectively, and are provided with set nut 11,13 between described shaft coupling 12 and sealing main shaft 7 and tension-compression sensor 14.Like this, can ensure to be connected firmly between parts, guarantee the accuracy of drive system, make to seal main shaft and move back and forth by predetermined displacement amplitude.
Embodiment 2
With reference to Fig. 2, Fig. 4 a～Fig. 4 d, Fig. 5 a to Fig. 6, the difference of the present embodiment and embodiment 1 is: the present embodiment is tested for pneumostop, described pick-up unit comprises suction gun 26B, wireway 23B and helium mass spectrometer leak detector 22B, one end of described wireway 23B connects described helium mass spectrometer leak detector 22B, and the other end is communicated with the first perforate on urceolus 8; Described servicing unit comprises gas conduit 24B, pressure governor 25B and helium tank 27B, described suction gun 26B is arranged on the openend of described helium tank 27B, one end of described gas conduit 24B is communicated with the second perforate on urceolus, the other end connects described pressure governor 25B, and described pressure governor 25B connects described suction gun 26B; The second perforate on the urceolus relative with the other end setting position of gas conduit adopts nut 28B sealing.
All the other embodiments are identical with embodiment 1.
Content described in this instructions embodiment is only enumerating of way of realization to inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also and conceive the equivalent technologies means that can expect according to the present invention in those skilled in the art.
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| CN104806504A (en) * | 2015-03-13 | 2015-07-29 | 吉林大学 | Method for observing dynamic sealing leakage mechanism and device for method |
| CN105241809A (en) * | 2015-09-25 | 2016-01-13 | 浙江工业大学 | O-shaped ring friction experiment apparatus |
| CN105300623A (en) * | 2015-11-17 | 2016-02-03 | 哈尔滨电机厂有限责任公司 | Blue-examination test method for examining sealing performance of end cap closing opening face of steam turbine generator |
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