CN86201647U - Monitor for absolute and relative vibration - Google Patents

Abstract

The utility model discloses a monitor for the absolute and relative vibration, and is an automatic monitoring and detection device. The present vibration monitor can only measure the relative vibration of the shaft to the bearing, and can not measure the absolute vibration problem of the shaft or the bearing. The utility model designs and manufactures a dual probe vibration monitor. The utility model utilizes two vortex sensors, a signal processing and indicating system and a status display and alarm system to form a complete monitor for the absolute and relative vibration, realizes the functions of the relative vibration and the absolute vibration in the operation monitoring of the rotary mechanism, and provides the output of the analysis.

Description

Monitor for absolute and relative vibration

The utility model relates to a kind of coal sample preparation facilities.

The crushing division machinery of coal sample is that departments such as fuel-burning power plant and colliery accurately calculate coal burning caloricity and analyze the necessary equipment of coal-fired composition.Usually adopt artificial or mechanical method for making sample, promptly with carrying out division with artificial coning and quartering or other with mechanical reduction device again after artificial or the Mechanical Crushing coal sample.Coning and quartering is divided into the quartern with coal sample with the cross sample spliter on iron plate, discard relative two, continues fusion division as stated above, till this coal sample reaches the desired weight of corresponding particle size fraction.Machinery division riffle generally commonly used or rotary reduction device.Rotary reduction device is made up of the container that is contained on the turntable, whenever circles and collects independent increment.With the mechanical hook-up that coal sample reduction and division are combined, external commonly used be the machine of 3 millimeters coal samples of the described preparation of GB standard ISO-1988 " hard coal-sampling ".This equipment is made up of the riffle that a sampling funnel, hammer mill, funnel drum type reduction device and a division go out two laboratory sample product, also with one for discarding spiral conveyer that part transports and the electric equipment of necessity in the original coal sample.The wherein a kind of of present domestic employing is HQ-80 type crushing division machine, and this machine is made up of deceleration part and one, two, three crushing shell and I and II division dish.

The purpose of this utility model is the shortcoming that exists at present existing coal sample preparation facilities, provide a kind of and can once finish coal sample reduction and division, and performance accurately and wet coal sample is difficult for the coal sample preparation facilities that blocks.Its main points are summarized as follows:

The basic element of character of forming this device is vibration layering screen (1,2), hollow cone mill (4), division dish (5), sample tap (8), abandons sample mouth (9), motor (12) and reducing gear (10).Conical disc mill and division dish are unitized construction, and the division dish is positioned at the conical disc mill bottom, has cavity at the Mo Ta center of conical disc mill.In order to help flowing of coal grain, cavity adopts conical, and the division dish is umbrella shape (promptly by center aspect circumferential edge).The vibration layering screen screen cloth with two-layer or three layers be advisable, coal sample is at first through the screening of vibration layering screen, less than the duff powder of 3mm through mill tower center cavity directly to the division dish, the even action of utilizing the centrifugal power of being used to around send out division, and sieve out after the conical disc mill crushing division greater than the coal cinder grain of 3mm, coal sample is flowed out by sample tap, and remaining is discharged by abandoning the sample mouth.Each parts and the base framed structure that unifies is installed and be need not to establish in addition the basis.In order to prolong wear-out part serviceable life, the wear-out part of conical disc mill adopts rich chromium cast iron or other wear-resistant material.Reducing gear adopts worm reducer or belt transmissioning mode etc.Motor is equipped with comprehensive protection device, stops the phase failure, overload, overcurrent are disconnected automatically, and can prevent has bad equipment of metal sundries card in coal sample.

Major advantage of the present utility model:

1, Zhi Bei coal sample degree of accuracy meets GB474-83 " preparation method of coal sample ", system error-free.

2, the adaptability to wet coal sample is good, is suitable for external moisture content less than 12% coal sample.

3, coal sample preparation process moisture loss is little.

4, crushing division is once finished, and the facility compact volume is little, in light weight.

5, easy and simple to handle, safe and reliable.Moving.The simultaneous faults indicator is luminous.

Advantage of the present utility model is, owing to adopted two probe sensors and custom-designed signal processing circuit, makes monitor of the present utility model have very wide Hz-KHz.Can indicate the vibration of 0～250 μ m, static clearance voltage 0～25V that simultaneously can also indication sensor.The setting value and the working value of indication vibratory alarm and danger warning.And monitor of the present utility model can also provide tangible duty to show, when the linear zone of working sensor in regulation, normal indicator is luminous.When superposition vibration surpassed the warning setting valve that presets, then warning indicator was luminous, and when the superposition vibration surpassed dangerous setting valve, risk indicator was luminous, and corresponding relays provides the Status Change signal.If monitor is operated in malfunction, then fault detector is luminous.Simultaneously can provide relative vibration.Absolute vibration, superposition VIBRATION ANALYSIS output signal and record drive signal are so that analyze and record.

After having adopted vibration monitor of the present utility model, in some, the relative vibration and the absolute vibration of main equipment, just can accurately be measured and continuous monitoring, thereby fabulous effect has been played in safety in production.

Accompanying drawing is a structured flowchart of the present utility model, wherein: the 3, the 4th, prime amplifier, the 5, the 6th, restrictor, the 7th, power supply, the 11st, the inefficacy circuit, the 38th, relative VIBRATION ANALYSIS lead-out terminal, the 39th, absolute vibration is analyzed lead-out terminal.

Specific embodiments of the present utility model is as follows: two probe sensors comprise E-1 type eddy current sensor and absolute eddy current sensor two parts.Stabilized voltage supply adopts the SW7924 three terminal integrated voltage stabilizer, and output voltage is-24V that demand limiter is made up of SF324 four high guaily unit and 3DK9H.Impact damper, peak peak detector, amplifying circuit, superposition circuit, Hi-pass filter, record driver all adopt the SF324 four high guaily unit, and normal circuit adopts SF339 four comparers.The inefficacy circuit adopts to be made up of a double-point double-throw switch and diode, single limit comparer that warning comparer, dangerous comparer all adopt SF339 to form, and relay drive circuit is made up of 74L,S10 three input ends, three Sheffer stroke gates and 3DK3.All relays all adopt JZQ1-33 type relay, and acknowledge circuit is made up of 3 74L10 integrated circuit.With the function of above each device according to its each terminal pin.Couple together according to given block diagram.Just can form of the present utility model relatively, the absolute vibration monitor.

Claims (4)

1, a kind of vibration monitor is made of eddy current sensor, amplifier, impact damper, wave detector, comparer, wave filter, driver, restrictor, stabilized voltage supply, indicator, record driver and relay.It is characterized in that having adopted custom-designed pair of probe sensor and corresponding signal process and indication mechanism structure, and state shows and the warning system structure.

2, vibration monitor according to claim 1 is characterized in that: said pair of probe sensor is made up of fixed relative eddy sensor (1) and the absolute eddy current sensor of suspension type (2).

3, vibration monitor according to claim 1, it is characterized in that said signal Processing and indication mechanism structure are by sensor (1), (2), impact damper (8), (14), amplifier (10), (12), peak peak detector (16), (18), (25) Hi-pass filter (22), superposition circuit (17), comparer (26), (28), table meter circuit (27), record driving circuit (31), (36), (37) are formed.

4, vibration monitor according to claim 1, it is characterized in that, said state shows and the warning system structure is by normal circuit (9), (13), relay drive circuit (20), (24), normal indicator (15), (19), warning comparer (26), dangerous comparer (28), acknowledge circuit (29), dangerous circuit (30), relay drive circuit (32), (34), warning indicator (33), risk indicator (35), impact damper (21), (23) are formed.

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