CN204419888U - A kind of large cylindrical roller bearing monitoring system - Google Patents

Abstract

The utility model relates to a kind of large cylindrical roller bearing monitoring system, belongs to bearing monitoring technical field.Inner core is fixed on inner ring, and inner core inside bottom wall is provided with internal partition, is provided with circuit board and sensor; Urceolus is fixed on outer ring, and urceolus cover outer tube; Urceolus diapire is provided with spline pillow block and external partition, and on spline pillow block, cover has magnet ring, is provided with annular groove between external partition and internal partition; One end of drawing transducer is through being arranged on inner core sidewall, and the transducer the other end is through rivet on T-shaped magnetic patch, and magnetic patch is enclosed within the annular groove between interior external partition, and the opposite pole of magnetic patch and magnet ring is near installing.Advantage and characteristic: mutually integrated with bearing, without the need to changing the structure of erection unit, can realize the real time on-line monitoring of real meaning; Transducer is by radial drawing excitation generating, and axial space is little, magnet is away from rolling element and emitting circuit; Piezo-electric sheet bears pressure stress all the time and stress distribution is even, and Mechanical Reliability is high, generating capacity is strong.

Description

A kind of large cylindrical roller bearing monitoring system

Technical field

The utility model belongs to bearing monitoring technical field, is specifically related to a kind of large cylindrical roller bearing monitoring system.

Background technique

Bearing is a kind of typical mechanical basic part, has apply extremely widely in fields such as machinery, vehicle, Aero-Space, steamer and the energy; But bearing is also one of the most flimsy part in rotary machine, and 30% of rotating machinery fault caused by bearing failure.Therefore, the status monitoring of bearing and Incipient Fault Diagnosis have caused the great attention of people.The on-line monitoring of bearing state has progressively become the indispensable technology in the fields such as high-rating generator, steamer, high ferro and aircraft, and the index of required monitoring comprises such as temperature, vibration, rotating speed and noise etc.Early stage bearing monitor system mainly external hanging type, one of its drawback is distant between sensor and signal source, belong to non-contacting indirect inspection, therefore error is larger.In recent years, people propose multi-form Embedded Monitoring System again in succession, this method can solve measuring accuracy and accuracy problem, but need the structure or its integrity that change relevant device, to install sensing and monitoring system, the problems such as this not only easily causes that the stress of equipment component is concentrated, the equipment of some complex structures or limited space also cannot realize; The most key, when monitoring system needs to rotate with bearing inner race or outer ring, inconvenience by line powered, and adopts powered battery very short for service time.Therefore, current bearing monitor system is all also non real-time, indirectly non-contact measurement substantially, is difficult to the running state obtaining bearing timely and accurately; In view of this, there has been proposed various ways from monitoring bearing, as Chinese patent 201410233736.3,201410233029.4,201410233722.1, the common feature of above-mentioned each patent utilizes bending-type transducer generating that is circular or cantilever beam type, piezo-electric sheet during work in transducer bears pressure stress and the tensile stress of alternately change, when bearing and transducer yardstick excessive time required axial dimension increases, tensile stress increases and easily cause piezo-electric sheet broken; In addition, due to the restriction of bearing and transducer architecture, existing in monitoring bearing non-contact exciting magnet and bearing roller spacing less, have certain influence to wireless signal transmission.

Summary of the invention

All kinds of problem existing in actual applications for existing bearing monitor system and propose from monitoring bearing potential problems in actual applications, the utility model provides a kind of large cylindrical roller bearing monitoring system.Large cylindrical roller bearing monitoring system of the present utility model is primarily of formations such as inner core, magnet ring, magnetic patch, packing ring, O type circle, urceolus, pressure ring, transducer, circuit board, sensor and wires; Embodiment of the present utility model is: the seam ring set of inner core bottom wall outer is on inner ring, and inner core diapire is fixed on inner ring end face through screw, is crimped with seal washer between inner core diapire and inner ring end face; Inner core inside bottom wall is provided with internal partition, and inner core inside bottom wall is provided with circuit board and sensor through screw; The flange of outer tube side wall end face is fixed on cycle surface through screw, and outer tube side wall is enclosed within outside inner core sidewall, is provided with O RunddichtringO between outer tube side wall and inner core sidewall; Urceolus diapire is provided with spline pillow block and external partition, spline pillow block is socketed with the magnet ring such as wall thickness such as not grade with splined hole, external partition and internal partition and magnet ring, inner core diapire and urceolus diapire form inner chamber jointly, and external partition and internal partition and inner core diapire, inner core sidewall, urceolus diapire and outer tube side wall form exocoel jointly; The annular groove that inner chamber and exocoel are interconnected is provided with between external partition and internal partition; The one end being placed in the drawing transducer in exocoel is arranged on the end face of inner core sidewall through screw and pressing plate, transducer is bonded with piezo-electric sheet by two and the tinsel of riveting mutually through rivet is formed, and the composite bed that transducer is made up of tinsel and piezoelectric piece bonding is circular arc; The other end of transducer is in the elongated slot of rivet longeron end on T-shaped magnetic patch, and the longeron of magnetic patch is socketed in the annular groove between external partition and internal partition, and the crossbeam of magnetic patch is placed in inner chamber, and the opposite pole of magnetic patch and magnet ring is near installing; Connect through wire L1 between the piezo-electric sheet on same tinsel, be connected through wire L2 between the piezo-electric sheet on different metal sheet, be connected through wire group L4 between transducer with circuit board, be connected through wire group L3 between circuit board with sensor.

In working procedure, when outer ring is relatively rotated by cylindrical body and inner ring, urceolus and inner core relatively rotate, thus drive magnetic patch and magnet ring to relatively rotate; Because the opposite pole of magnetic patch and magnet ring is near installing, when magnetic patch and magnet ring relatively rotate, transducer bears pulling force effect all the time, piezo-electric sheet bears action of compressive stress all the time; Because the magnet ring with splined hole is different in the magnetic intensity of circumferencial direction, therefore the pulling force that transducer bears when magnetic patch and magnet ring relatively rotate and the pressure stress that piezo-electric sheet bears alternately increase and reduce, piezo-electric sheet institute compression chord alternately increases and reduces to convert electric energy to by mechanical energy, and this is power generation process; The change-over circuit treatment and supplied sensor of the electric energy generated on circuit board, thus realize the automatic monitoring of bearing temperature, rotating speed or vibration characteristics.

In the utility model, for improve transducer generating capacity, avoid piezo-electric sheet when off working state because damaging by excessive action of pulling stress, should guarantee that the least radius of the tinsel circular arc external surface on transducer when the crossbeam of magnetic patch contacts with internal partition and external partition is R=h{ α+0.5 [α ²(1-β)-1-η E _p/ T _p1-α]/[(1-β)] }, the minimum range in inner chamber in magnetic patch moving direction is D=[L-2Rsin (0.5L/R)] n, wherein $\mathrm{\η}=(1-\mathrm{\α})[1-\mathrm{\α}(1-\mathrm{\β})]+\mathrm{\α\β}/(1+k_{31}^2),$ α=h _m/ h, h=h _m+ h _p, h _p, h _mbe respectively piezo-electric sheet and sheet thicknesses, β=E _m/ E _p, E _p, E _mbe respectively the Young's modulus of piezo-electric sheet and tinsel, t _pbe respectively electromechanical coupling factor and the allowable tensile stress of piezoelectric material, L is single circular arc chord length on tinsel, and n is Circular Arc on single metal sheet.

Advantage and characteristic: 1. integrated with bearing and generate electricity in real time, can realize real time on-line monitoring truly; 2. transducer is by radial drawing excitation generating, and required axial space is little, permanent magnet is away from rolling element and emitting circuit; 3. the drawing transducer of Prebending type is in tension state all the time, and namely piezoelectric chip bears pressure stress and stress distribution is even all the time, therefore Mechanical Reliability is high, generating capacity is strong.

Accompanying drawing explanation

Fig. 1 is the section of structure of roller bearing monitoring system in the utility model preferred embodiment;

Fig. 2 is the A-A view of Fig. 1;

Fig. 3 is the structural representation of transducer;

Fig. 4 is the structural representation of band splined hole magnet ring;

Fig. 5 be in Fig. 1 transducer by minimum magnetic force time I portion enlarged view;

Fig. 6 is I portion enlarged view when magnetic patch contacts with internal partition and external partition in Fig. 1;

Fig. 7 is I portion enlarged view when laying down magnetic patch in Fig. 1;

Embodiment

As shown in Fig. 1 ~ Fig. 6, large cylindrical roller bearing monitoring system of the present utility model is primarily of formations such as inner core 4, magnet ring 5, magnetic patch 6, packing ring 7, O type circle 8, urceolus 9, pressure ring 10, transducer H, circuit board B, sensor S and wires.

Seam ring set outside the diapire 41 of inner core 4 is on inner ring 3, and inner core diapire 41 is fixed by screws on the end face of inner ring 3, is crimped with seal washer 7 between the end face of inner core diapire 41 and inner ring 3; The inner side of inner core diapire 41 is provided with internal partition 42, is provided with circuit board B and sensor S inside inner core diapire 41 through screw; The flange of sidewall 91 end face of urceolus 9 is fixed on the end face of outer ring 1 through screw, outer tube side wall 91 is enclosed within outside inner core sidewall 43, is provided with O RunddichtringO between outer tube side wall 91 and inner core sidewall 43; The diapire 92 of urceolus 9 is provided with spline pillow block 94 and external partition 93, spline pillow block 94 is socketed with the magnet ring such as wall thickness such as not grade 5 with splined hole 51, external partition 93 and internal partition 42 form inner chamber C1 jointly with magnet ring 5, inner core diapire 41 and urceolus diapire 92, and external partition 93 and internal partition 42 form exocoel C2 jointly with inner core diapire 41, inner core sidewall 43, urceolus diapire 92 and outer tube side wall 91; The annular groove C3 that inner chamber C1 and exocoel C2 is interconnected is provided with between external partition 93 and internal partition 42; The one end being placed in the drawing transducer H in exocoel C2 is arranged on the end face of the sidewall 43 of inner core 4 through screw and pressure ring 10, transducer H is bonded with piezo-electric sheet H2 by two and forms through the tinsel H1 that rivet H3 phase is riveted, and transducer H is circular arc by bonding the formed composite bed of tinsel H1 and piezo-electric sheet H2; The other end of transducer H is in the elongated slot of rivet longeron 61 end on T-shaped magnetic patch 6, the longeron 61 of magnetic patch 6 is socketed in the annular groove C3 between external partition 93 and internal partition 42, the crossbeam 62 of magnetic patch 6 is placed in inner chamber C1, and magnetic patch 6 is installed with the opposite pole of magnet ring 5 is close; Connect through wire L1 between the piezo-electric sheet H2 on same tinsel H1, be connected through wire L2 between the piezo-electric sheet H2 on different metal sheet H1, be connected through wire group L4 between transducer H with circuit board B, be connected through wire group L3 between circuit board B with sensor S.

In working procedure, when outer ring 1 is relatively rotated with inner ring 3 by cylindrical body 2, urceolus 9 and inner core 4 relatively rotate, thus drive magnetic patch 6 and magnet ring 5 to relatively rotate; Because the opposite pole of magnetic patch 6 and magnet ring 5 is near installing, when magnetic patch 6 and magnet ring 5 relatively rotate, transducer H bears pulling force effect all the time, piezo-electric sheet H2 bears action of compressive stress all the time; Because the magnet ring 5 with splined hole 51 is different in the magnetic intensity of circumferencial direction, therefore the pulling force that transducer H bears when magnetic patch 6 and magnet ring 5 relatively rotate and the pressure stress that piezo-electric sheet H2 bears alternately increase and reduce, piezo-electric sheet H2 institute compression chord alternately increases and reduces to convert electric energy to by mechanical energy, and this is power generation process; The change-over circuit treatment and supplied sensor S of the electric energy generated on circuit board B, thus realize the automatic monitoring of bearing temperature, rotating speed or vibration characteristics.

In the utility model, for improve transducer H generating capacity, avoid piezo-electric sheet H2 when off working state because damaging by excessive action of pulling stress, on the tinsel H1 that should guarantee the transducer H when magnetic patch 6 upper beam 62 contacts with internal partition 42 and external partition 93, the least radius of circular arc external surface is R=h{ α+0.5 [α ²(1-β)-1-η E _p/ T _p1-α]/[(1-β)] }, the minimum range in inner chamber C1 in magnetic patch 6 moving direction is D=[L-2Rsin (0.5L/R)] n, wherein α=h _m/ h, h=h _m+ h _p, h _p, h _mbe respectively the thickness of piezo-electric sheet H2 and tinsel H1, β=E _m/ E _p, E _p, E _mbe respectively the Young's modulus of piezo-electric sheet H2 and tinsel H1, t _pbe respectively electromechanical coupling factor and the allowable tensile stress of piezoelectric material, L is the chord length of single circular arc on tinsel H1, and n is the circular arc quantity on single metal sheet H1.

Claims (1)

1. a large cylindrical roller bearing monitoring system, is characterized in that: inner core diapire is fixed on inner ring through screw, and inner core inside bottom wall is provided with internal partition, and inner core diapire is provided with circuit board and sensor through screw; The flange of outer tube side wall is fixed on outer ring through screw, and outer tube side wall is enclosed within outside inner core sidewall, is provided with O type circle between inner/outer tube sidewall; Urceolus diapire is provided with spline pillow block and external partition, and on spline pillow block, cover has magnet ring, and interior external partition and magnet ring, inner core diapire and urceolus diapire form inner chamber jointly, and interior external partition and inner core diapire, inner core sidewall, urceolus diapire and outer tube side wall form exocoel jointly; The annular groove that inner chamber and exocoel are interconnected is provided with between interior external partition; Transducer one end is arranged on the end face of inner core sidewall through screw and pressing plate, and transducer is bonded with piezo-electric sheet by two and the tinsel of riveting mutually through rivet is formed, and the composite bed that transducer is made up of tinsel and piezoelectric piece bonding is circular arc; The transducer the other end is in the elongated slot of rivet longeron end on T-shaped magnetic patch, and magnetic patch longeron is socketed in the annular groove between interior external partition, and the crossbeam of magnetic patch is placed in inner chamber, and the opposite pole of magnetic patch and magnet ring is near installing.