CN2160902Y

CN2160902Y - Bearing monitor

Info

Publication number: CN2160902Y
Application number: CN 93207685
Authority: CN
Inventors: 夏成明; 王维德; 卢兵; 张兴全; 杨震春
Original assignee: No510 Inst Of No5 Academy Ministry Of Aeronautics And Astronautics Industry
Current assignee: No510 Inst Of No5 Academy Ministry Of Aeronautics And Astronautics Industry
Priority date: 1993-03-23
Filing date: 1993-03-23
Publication date: 1994-04-06
Anticipated expiration: 2003-03-23

Abstract

The utility model relates to a bearing monitor. The utility model automatically monitors the radial abrasion quantity of the bearing. The rotating shaft of the bearing is provided with a permanent-magnetic ring which is corresponding to a generator rotor. The machine body corresponding to the upper and the lower positions of the permanent-magnetic ring is provided with two probe heads. The induction coil of the probe head generates the induction electric potential. The lower probe head and the permanent-magnetic ring form a clearance sensor. When the bearing abrades the shaft and sinks, the gap of the probe head and the permanent-magnetic is reduced, the utility model senses the variation of the electric potential, a transformation amplification drive indicating instrument indicates the abrasion situation, and the induced current generated by the upper probe head is used as the drive current of the amplifier of the lower probe head. The utility model is suitable for various mechanical devices, and is especially suitable for magnetic drive sealing pumps.

Description

Bearing monitor

The utility model relates to a kind of bearing monitoring device, the bearing monitoring device of the automatic monitoring bearing radial wear of especially a kind of energy, by gap sensor, functional transformation amplifier, indicating instrument connection form, and the electric signal that gap sensor produces is illustrated by indicating instrument through functional transformation amplifier conversion amplification.

In mechanical driving device, the wearing and tearing of bearing bring harm can for machinery itself and production run, especially easier generation wearing and tearing when using sliding bearing particularly at nonmetallic bearings such as use graphite, synthetic resin, often therefore needing, shutdown dismounting equipment overhauls; As in the magnetic drives canned pump; the magnetic force male part of high speed rotating passes through spacer sleeve transferring power therebetween; to hold wearing and tearing big slightly when pump body inner shaft; internal magnetic pole will gall spacer sleeve; at this moment the medium of carrying in the pump housing will from breakage by outside the magnetic level suction outside pump; when being inflammable, explosive, hypertoxic liquid, pumped (conveying) medium will produce greatly harm; especially the easier generation of this situation when pump adopts the graphite-based bearing; do not leak in order to ensure medium; just must often shut down the dismounting overhaul of the equipments, not only influence production, time-consuming but also can not in time prevent the generation of accident.

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art and monitor that the automatic monitoring bearing gauge wear of a kind of energy is provided, intuitively shows the bearing wear situation by indicating instrument, makes maintenance have promptness, planned, and the accident of stopping takes place.

The purpose of this utility model can realize by following measure:

A kind of bearing monitoring device, form gap sensor by being installed in the detection probe that is installed on the body under magnet ring in the bearing rotating shaft and the magnet ring, when driving magnet ring, rotating shaft rotates together, its effect is equivalent to generator amature, inductive coil in the detection probe rotates under the action of alternating magnetic field that produces at magnet ring and produces induced potential, and it is that bearing wear rear axle deflection changes that this electromotive force changes with detection probe and magnet ring gap; The induced electricity signal is amplified in through the conversion of functional transformation amplifier the bearing wear situation is shown on the indicating instrument.

The utility model can be installed in detection probe inductive coil (12) in the big envelope (9,10,11), constitute magnet ring by package cover (13) encapsulation NiFeB magnet, and body is installed 1～2 power supply probe that structure is identical with detection probe above magnet ring, its induced current is through the working power of voltage multiplying rectifier as the functional transformation amplifier, make bearing monitoring device self generating, work under the external power source situation not needing, to satisfy the requirement of electrical equipment explosion--proof regulations.

The utility model bearing monitoring device has the following advantages:

Can monitor mechanical operational process centre bearer gauge wear situation automatically, intuitively show the bearing wear amount by indicating instrument, make overhaul of the equipments in time planned, the accident of stopping takes place, and avoids the influence of regular maintenance to producing; And can work under the external power source not needing.

The utility model bearing monitoring device accompanying drawing drawing is described as follows:

Fig. 1 is the utility model bearing monitoring device fundamental diagram

1-rotating shaft 2-magnet ring 3-power supply probe 4,6-bearing

5-detection probe 7-functional transformation amplifier 8-indicating instrument

Fig. 2 is the utility model bearing monitoring device detection probe structural representation

9-big envelope body 10-big envelope plug screw 11-insulating mat 12-inductive coil

Fig. 3 is the utility model bearing prison device magnet ring structural representation

13-package cover 14-NiFeB magnet

The utility model is described in further detail below in conjunction with accompanying drawing 1～3:

The magnet ring of being made up of stainless steel big envelope (13) encapsulation NiFeB magnet (2) is installed in the rotating shaft (1) as shown in Figure 1, probe (3,5) is made up of package cover (9,10,11) and inductive coil (12), the inductive coil (12) that is installed in the big envelope body (9) is fixed on big envelope body (9) bottom by the big envelope plug screw (10) that cooperates with big envelope body (9), between big envelope plug screw (10) and the inductive coil (12) insulating mat (16) is arranged, big envelope body (9) appearance is processed with screw thread and is used for probe installation on body, adjusts; A detection probe (5) is installed on body under the magnet ring (2), and symmetry is installed 2 power supply probes (3) above body; Detection probe (5) and function conversion amplifier (7) signal input end connects, and functional transformation amplifier (7) signal output part connects with reometer (8) as indicating instrument; Power supply probe (3) and function conversion amplifier (7) working power end connects, through its inner voltage multiplying rectifier output services electric current; For making reometer have linear direct-reading, set indicating instrument figure and bearing clearance corresponding relation, output characteristic curve and reometer performance curve according to gap sensor (2,5), determine the output characteristic curve of functional transformation amplifier, design, adjust functional transformation amplifier (7) in view of the above, make the indicating instrument reometer have linear direct-reading, intuitively reflect the abrasion condition of bearing.

Claims

1, a kind of bearing monitoring device, by gap sensor (2,5), functional transformation amplifier (7), indicating instrument (8) connection forms; The electric signal that gap sensor (2,5) produces is illustrated by indicating instrument (8) through functional transformation amplifier (7) conversion amplification, it is characterized in that: described gap sensor (2,5) is made up of detection probe (5), magnet ring (2), magnet ring (2) is installed in the rotating shaft (1), detection probe (5) is installed on the body under the magnet ring (2), and but phase countershaft (1) does radially and to adjust, and inductive coil is arranged in the detection probe.

2, bearing monitoring device according to claim 1, it is characterized in that: body is equipped with 1～2 power supply probe (3) in magnet ring (2) top, it is identical with detection probe (5) that and function conversion amplifier (7) connection connects its structure, as the working power of functional transformation amplifier (7).

3, according to claim 1,2 described bearing monitoring devices, it is characterized in that: described indicating instrument is a reometer, the induced electricity signal amplifies through the conversion of functional transformation amplifier, makes the reometer output characteristic as indicating instrument have linear direct-reading at active section.