CN103398051B - A kind of sinusoid high frequency oscillation experimental setup of step-less adjustment - Google Patents
A kind of sinusoid high frequency oscillation experimental setup of step-less adjustment Download PDFInfo
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- CN103398051B CN103398051B CN201310303741.2A CN201310303741A CN103398051B CN 103398051 B CN103398051 B CN 103398051B CN 201310303741 A CN201310303741 A CN 201310303741A CN 103398051 B CN103398051 B CN 103398051B
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Abstract
The present invention relates to a kind of sinusoid high frequency oscillation experimental setup of step-less adjustment, comprise front seal casinghousing, rear seal casinghousing, rotating disk, rotating shaft, motor, back-pressure provisioning component, intake assembly and spout assembly, one end of rotating shaft by bearings on front seal casinghousing, the other end of rotating shaft is connected with the output shaft of motor through rear seal casinghousing, rotating disk to be fixed in rotating shaft and to be positioned at Seal cage, and rotating disk is along the circumferential direction evenly equipped with multiple straight hole; Back-pressure provisioning component comprises the back-pressure interface be arranged on front seal casinghousing, back-pressure conversion adapter and back-pressure joint, intake assembly comprises the entrance, nozzle and the inlet attack that are arranged on front seal casinghousing, nozzle runs through entrance, and the other end is fixedly connected with inlet attack; Shower nozzle contacts with rotating disk motive sealing.Experimental setup of the present invention can realize the liquid flow environments of sinusoidal oscillation, and the oscillation frequency of excitation is high, and oscillation frequency accurately controls actuating motor rotating speed by PLC program and realizes step-less adjustment.
Description
Technical field
The present invention relates to a kind of sinusoid high frequency oscillation experimental setup of step-less adjustment, be applied to the Research on Dynamic Characteristic field of fluid machinery.
Background technique
Fluid machinery is all used in unsteady state flowing environment, the reflection of fluid machinery dynamic characteristic be the ability of practical function under its real operating environments, but the function examination of a lot of fluid machinery model model machine is all do not having or carrying out under minimum pressure oscillation state, be difficult to the dynamic characteristic of comprehensive assessment product.In fluid, the pressure oscillation (being generally high frequency) of some characteristic frequency can make oscillating quantity amplify through fluid machinery effect, engineering goods rotating component or supply line may be made to produce vibration and with noise and then affect fluid machinery product working life, time serious, can directly cause fluid machinery to destroy.
Motive fluid pressure oscillation produces positive feedback and causes fluid machinery failure phenomenon more common, but reproduce means owing to lacking corresponding flowing environment, generally be difficult to carry out the work of corresponding failure modality diagnostic experimental research, the structure optimization can only being undertaken to a certain degree by means such as simulation calculation.
The sinusoid high frequency oscillation experimental setup of step-less adjustment can encourage the sinusoid high frequency fluid pressure oscillation of multi-frequency and intensity, for the research of fluid machinery dynamic characteristic experiment provides a kind of pressure pulsation flowing environment of high sine degree.
The content of invention
Technology of the present invention is dealt with problems and is: the sinusoid high frequency oscillation experimental setup providing a kind of step-less adjustment, this experimental setup can realize the liquid flow environments of sinusoidal oscillation, the oscillation frequency high (material object of design reaches 6000Hz) of excitation, oscillation frequency accurately controls actuating motor rotating speed by PLC program and realizes step-less adjustment.
Technical solution of the present invention is:
A kind of sinusoid high frequency oscillation experimental setup of step-less adjustment, its special way is: comprise front seal casinghousing 1, rear seal casinghousing 2, rotating disk 3, rotating shaft 13, motor, back-pressure provisioning component, intake assembly and spout assembly, described front seal casinghousing 1 is fixedly connected with rear seal casinghousing 2 and forms Seal cage, one end of described rotating shaft 13 by bearings on front seal casinghousing 1, the other end of described rotating shaft is connected with the output shaft of motor through rear seal casinghousing, described rotating disk to be fixed in rotating shaft 13 and to be positioned at Seal cage, described rotating disk is along the circumferential direction evenly equipped with multiple straight hole,
Described back-pressure provisioning component comprises the back-pressure interface, back-pressure conversion adapter 7 and the back-pressure joint 10 that are arranged on front seal casinghousing 1, described back-pressure conversion adapter 7 is fixedly connected with front seal casinghousing 1 and runs through back-pressure interface, and described back-pressure joint is fixedly connected with back-pressure conversion adapter 7;
Described spout assembly comprises the outlet be arranged on rear seal casinghousing 2 and the outlet connection 28 be fixed on rear seal casinghousing 2, described outlet connection and outlet;
Described intake assembly comprises the entrance, nozzle and the inlet attack that are arranged on front seal casinghousing 1, and described nozzle runs through entrance, and one end is positioned at Seal cage, and the other end is fixedly connected with inlet attack;
Described nozzle comprises nozzle body and is positioned at the shower nozzle of nozzle body, and the orifice center of shower nozzle is positioned on the straight hole central distribution circle of rotating disk, and described shower nozzle contacts with rotating disk motive sealing.
The injection diameter of above-mentioned shower nozzle is identical with the straight hole diameter of rotating disk, and the distance at adjacent straight hole center is the twice of straight hole diameter.
The straight hole diameter of above-mentioned rotating disk is 1-3mm.
The material of above-mentioned rotating disk and shower nozzle is high-hardness metal material, and high hardness refers to HRC >=40, described rotating disk and/or shower nozzle contact end face deposition solid lubrication coating.
Above-mentioned rotating disk straight hole is flaring structure at outlet end, and flaring angle is 30 °-60 °.
The vertical plane sum shower nozzle that above-mentioned shower nozzle is positioned at nozzle body one end contacts one end planimetric area ratio with rotating disk is 3-5.
Above-mentioned spout assembly is positioned at the lowest part of rear seal casinghousing.
Above-mentioned motor is actuating motor.
Above-mentioned solid lubrication coating is DLC carbon back coating DLC, class graphite carbon based coating GLC, TiN coating or CrN coating.
Above-mentioned high-hardness metal material is 2Cr13,7Cr17 or 9Cr18.
Advantage of the present invention is:
1, fluid flows through the minimum flow area of experimental setup of the present invention is the change of high sine degree, and the hydrodynamic pressure encouraged vibration is the change and stepless adjustable in high sine degree thereupon also.
2, suppose that n is motor speed (unit rpm), m is the along the circumferential direction uniform straight hole number of rotating disk, the fluid oscillating frequency so utilizing experimental setup of the present invention to produce is
.Can show that oscillation frequency improves (generally can reach and be not less than 6000Hz) along with the increase of straight hole number and motor speed thus.
3, motor can step-less adjustment, so basis by the rotating speed that PLC program control produces
, the fluid oscillating frequency that experimental setup of the present invention produces also can step-less adjustment.
Accompanying drawing explanation
Fig. 1 is step-less adjustment sinusoid high frequency oscillation experimental setup sectional drawing of the present invention;
Fig. 2 is step-less adjustment sinusoid high frequency oscillation experimental setup application system figure of the present invention;
Fig. 3 is turntable structure figure of the present invention;
Fig. 4 is the side view of Fig. 3;
Fig. 5 is A place enlarged view;
Fig. 6 is the structural representation of intake assembly.
Embodiment
As shown in Figure 1 and Figure 2, the present invention is primarily of comprising front seal casinghousing 1, rear seal casinghousing 2, rotating disk 3, rotating shaft 13, motor, back-pressure provisioning component, intake assembly and spout assembly composition.Place sealing gasket 24 between front seal casinghousing 1 and rear seal casinghousing 2 and be bolted, making to form Seal cage between two housings.Front bearing retainer 11 is fixed by bolt and gasket seal 22 with front seal casinghousing 1 and seals; Rear bearing cover 12 is fixed by bolt and gasket seal 12, seal ring 6 and rear seal casinghousing 2 and is sealed; Rotating shaft 13 is positioned at Seal cage and is supported on front seal casinghousing 1 and rear seal casinghousing 2 by ball bearing 25, ball bearing 16 and thrust-bearing 17, one end of rotating shaft 13 is positioned at front bearing retainer 11, and the other end is stretched out rear bearing cover 12 and is connected by coupling 27 with motor 23.Actuating motor selected by general motor, the rotation speed change process of actuating motor is controlled by the PLC 26 of prior programmed, and the control sensitivity of output control signal precision and actuating motor self that the rotational speed regulation precision of actuating motor carries hardware by PLC control program 26 determines.
Back-pressure provisioning component comprises the back-pressure interface, back-pressure conversion adapter 7 and the back-pressure joint 10 that are arranged on front seal casinghousing 1, and back-pressure conversion adapter 7 is fixedly connected with front seal casinghousing 1 and runs through back-pressure interface, and back-pressure joint is fixedly connected with back-pressure conversion adapter 7; Spout assembly comprises the outlet be arranged on rear seal casinghousing 2 and the outlet connection 28 be fixed on rear seal casinghousing 2, outlet connection and outlet; Intake assembly comprises the entrance, nozzle and the inlet attack that are arranged on front seal casinghousing 1, and nozzle runs through entrance, and one end is positioned at Seal cage, and the other end is fixedly connected with inlet attack;
As shown in Fig. 3,4,5, rotating disk 3 is fixed in rotating shaft 13, and the fixing and transmission by the positioning step of rotating shaft 13, gland nut 14 and key 15, some straight holes along the circumferential direction arranged by rotating disk 3.
As shown in Figure 6, nozzle comprises nozzle body and is positioned at the shower nozzle of nozzle body, and the orifice center of shower nozzle is positioned on the straight hole central distribution circle of rotating disk, and shower nozzle contacts with rotating disk motive sealing.Self-adapting seal nozzle is made up of nozzle body 8, nozzle body conversion adapter 18, shower nozzle 5, seal ring 21 and sealing gasket (19,20).Adaptive nozzle is fixed with front seal casinghousing 1 by screw thread and sealing gasket 19; Be fixed by sealing gasket 20 between nozzle body 8 and nozzle body conversion adapter 18; Shower nozzle 5 is positioned at nozzle body, ensures contact end face seal and can move vertically by seal ring 21.Shower nozzle 5 devises four road sealing grooves, can according to the layout quantity of actual sealing effect determination seal ring 21, and it contacts end face and deposits graphite-like film solid lubrication coating (GLC) 4 equally with rotating disk, makes the two reliable sealing and lubricates good.The distribution circle that adaptive nozzle axial direction is formed through the some straight hole centers of circle of rotating disk 3, rotating disk 3, under the drive of servomotor 23, can make the circulation area mechanical periodicity of fluid.Sealing load between self-adapting seal nozzle and rotating disk 3 realizes self adaption from the pressure in shower nozzle 5 front end, hydrodynamic pressure in the area ratio of shower nozzle 5 front end active area and sealing area by fluid.
In order to realize the legal sinusoidal curve of fluid dither waveform encouraged, the injection diameter of shower nozzle is identical with the straight hole diameter of rotating disk, and the distance at adjacent straight hole center is the twice of straight hole diameter.Generally the straight hole diameter of rotating disk is set to 1-3mm.
In order to realize the effective sealing between rotating disk and the shower nozzle of adaptive nozzle, and greatly can reduce the surface friction drag between rotating disk and shower nozzle.The material of rotating disk and shower nozzle is high-hardness metal material, and high hardness refers to HRC >=40, and the vertical plane of rotating disk and/or shower nozzle contact jaw is along certain circumference range deposition graphite-like film solid lubrication coating deposition solid lubrication coating 4.The region that solid lubrication coating 4 range of deposition wants ensuring coverage to contact with the shower nozzle 5 of self-adapting seal nozzle.Wherein solid lubrication coating is DLC carbon back coating DLC, class graphite carbon based coating GLC, TiN coating or CrN coating; Wherein high-hardness metal material is 2Cr13,7Cr17 or 9Cr18.
In order to improve the anti-cavitation characteristic of experimental setup, strengthening fluid vibrates: rotating disk straight hole is flaring structure at outlet end, and flaring angle is 30 °-60 °.
In order to be realized the self adaption of seal pressure by fluid pressure action, the vertical plane sum shower nozzle that shower nozzle is positioned at nozzle body one end contacts one end planimetric area ratio with rotating disk is 3-5.The shower nozzle of self-adapting seal nozzle along the upstream extremity in fluid motion direction and downstream at the projected area ratio 3-5 of Vertical direction that flows.
In order to realize without hydrops, spout assembly is positioned at the lowest part of rear seal casinghousing.
Working principle of the present invention:
Rotating disk is along the circumferential direction uniformly distributed some straight holes, and rotating shaft drives turntable rotation under the driving of servomotor, and scalable shower nozzle contacts with motive sealing between rotating disk, makes to realize between rotating disk and self-adapting seal nozzle sealing by the pressure of fluid.In rotating disk high-speed rotation, the runner between the spray orifice of rotating disk straight hole and self-adapting seal nozzle is sinusoid cyclically-varying, and motive fluid produces sinusoid high frequency oscillation.
The fluid that sealed-in nozzles enters the high frequency oscillation experimental setup of step-less adjustment is the bypass of accommodating fluid in experiment, and adaptive nozzle front end arranges modulating valve; A threeway is arranged in modulating valve front end, and fluid main road after distributing T-pipe enters in the fluid machinery of experiment.The fluid entering the high frequency oscillation experimental setup of step-less adjustment, after rotating disk 3 disturbance, is discharged along welded joint 28, modulating valve.
Front seal casinghousing 1 arranges back-pressure supply interface, is made up of with back-pressure interface 7 welding straight coupling 10.Compressed gas enters in Seal cage through this road, and the pressure realized in Seal cage regulates.The amplitude of activation pressure vibration passes through the modulating valve co-controlling of this Seal cage pressure and adaptive nozzle front end.
Claims (9)
1. the sinusoid high frequency oscillation experimental setup of a step-less adjustment, it is characterized in that: comprise front seal casinghousing (1), rear seal casinghousing (2), rotating disk (3), rotating shaft (13), motor, back-pressure provisioning component, intake assembly and spout assembly, described front seal casinghousing (1) is fixedly connected with rear seal casinghousing (2) and forms Seal cage, one end of described rotating shaft (13) by bearings on front seal casinghousing (1), the other end of described rotating shaft is connected with the output shaft of motor through rear seal casinghousing, described rotating disk is fixed on rotating shaft (13) and goes up and be positioned at Seal cage, described rotating disk is along the circumferential direction evenly equipped with multiple straight hole,
Described back-pressure provisioning component comprises the back-pressure interface be arranged on front seal casinghousing (1), back-pressure conversion adapter (7) and back-pressure joint (10), described back-pressure conversion adapter (7) is fixedly connected with front seal casinghousing (1) and runs through back-pressure interface, and described back-pressure joint is fixedly connected with back-pressure conversion adapter (7);
Described spout assembly comprises the outlet be arranged on rear seal casinghousing (2) and the outlet connection (28) be fixed on rear seal casinghousing (2), described outlet connection and outlet;
Described intake assembly comprises the entrance, nozzle and the inlet attack that are arranged on front seal casinghousing (1), and described nozzle runs through entrance, and one end is positioned at Seal cage, and the other end is fixedly connected with inlet attack;
Described nozzle comprises nozzle body and is positioned at the shower nozzle of nozzle body, and the orifice center of shower nozzle is positioned on the straight hole central distribution circle of rotating disk, and described shower nozzle contacts with rotating disk motive sealing;
The material of described rotating disk and shower nozzle is high-hardness metal material, and high hardness refers to HRC >=40, described rotating disk and/or shower nozzle contact end face deposition solid lubrication coating.
2. the sinusoid high frequency oscillation experimental setup of step-less adjustment according to claim 1, is characterized in that: the injection diameter of described shower nozzle is identical with the straight hole diameter of rotating disk, the distance at adjacent straight hole center is the twice of straight hole diameter.
3. the sinusoid high frequency oscillation experimental setup of step-less adjustment according to claim 2, is characterized in that: the straight hole diameter of described rotating disk is 1-3mm.
4. the sinusoid high frequency oscillation experimental setup of the step-less adjustment according to claim 1 or 2 or 3, is characterized in that: described rotating disk straight hole is flaring structure at outlet end, and flaring angle is 30 °-60 °.
5. the sinusoid high frequency oscillation experimental setup of step-less adjustment according to claim 4, is characterized in that: the vertical plane sum shower nozzle that described shower nozzle is positioned at nozzle body one end contacts one end planimetric area ratio with rotating disk is 3-5.
6. the sinusoid high frequency oscillation experimental setup of step-less adjustment according to claim 5, is characterized in that: described spout assembly is positioned at the lowest part of rear seal casinghousing.
7. the sinusoid high frequency oscillation experimental setup of step-less adjustment according to claim 6, is characterized in that: described motor is actuating motor.
8. the sinusoid high frequency oscillation experimental setup of step-less adjustment according to claim 7, is characterized in that: described solid lubrication coating is DLC carbon back coating DLC, class graphite carbon based coating GLC, TiN coating or CrN coating.
9. the sinusoid high frequency oscillation experimental setup of step-less adjustment according to claim 8, is characterized in that: described high-hardness metal material is 2Cr13,7Cr17 or 9Cr18.
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| CN103630314A (en) * | 2013-11-25 | 2014-03-12 | 苏州东菱振动试验仪器有限公司 | Blade high on-line air flow excitation system and test method |
| CN104330210A (en) * | 2014-10-30 | 2015-02-04 | 北京航天计量测试技术研究所 | Square wave pressure generator in porous turning wheel structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1670196A1 (en) * | 1989-03-31 | 1991-08-15 | Московский авиационный институт им.Серго Орджоникидзе | Method for generation of nonlinear vibrations and hydromechanical pulsator |
| CN2451916Y (en) * | 2000-08-28 | 2001-10-03 | 宝山钢铁股份有限公司 | Rotary pulsating airflow generator |
| CN101726392A (en) * | 2008-10-16 | 2010-06-09 | 北京航天计量测试技术研究所 | Sinusoid pressure generator with inlet-outlet bidirectional modulation |
| CN102410288A (en) * | 2011-08-30 | 2012-04-11 | 北京航空航天大学 | Wheel-disc-type flow pulsation generator |
| CN102966643A (en) * | 2012-11-22 | 2013-03-13 | 裕东（中山）机械工程有限公司 | Mechanical rotary type pulse gas generator |
-
2013
- 2013-07-15 CN CN201310303741.2A patent/CN103398051B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1670196A1 (en) * | 1989-03-31 | 1991-08-15 | Московский авиационный институт им.Серго Орджоникидзе | Method for generation of nonlinear vibrations and hydromechanical pulsator |
| CN2451916Y (en) * | 2000-08-28 | 2001-10-03 | 宝山钢铁股份有限公司 | Rotary pulsating airflow generator |
| CN101726392A (en) * | 2008-10-16 | 2010-06-09 | 北京航天计量测试技术研究所 | Sinusoid pressure generator with inlet-outlet bidirectional modulation |
| CN102410288A (en) * | 2011-08-30 | 2012-04-11 | 北京航空航天大学 | Wheel-disc-type flow pulsation generator |
| CN102966643A (en) * | 2012-11-22 | 2013-03-13 | 裕东（中山）机械工程有限公司 | Mechanical rotary type pulse gas generator |
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