• Ultrasonic Virbation transducer and generator for vibrating screen
  • Ultrasonic Virbation transducer and generator for vibrating screen

Ultrasonic Virbation transducer and generator for vibrating screen

Model No.︰

-

Brand Name︰

Ginpertec

Country of Origin︰

China

Unit Price︰

CNY ¥ 1 / pc

Minimum Order︰

1 pc

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Product Description

1. Product design principle
Ultrasonic vibrating screen is a new type of vibrating screen that combines ultrasonic vibration with mechanical vibration of vibrating screen. Its working principle is to transmit high-frequency ultrasonic vibration through the guide ring to the entire screen surface to drive the vibration of the screen to achieve rapid screening. The purpose of the material.
The principle of the transducer applied to the ultrasonic vibrating screen is to offset the piezoelectric ceramic expansion stress by applying pre-stress, and obtain high-frequency, high-strength, large-amplitude mechanical vibration to achieve the purpose of converting electrical energy into mechanical energy. Because of the use nature of the vibrating screen, it needs to work in the air for a long time and continuously. Therefore, the transducer is required to have high amplitude, low heat generation, high reliability and the like, and the high demand for structural materials and related processes is also very high. high.
Ultrasonic is a high-power ultrasonic supercharger that operates continuously, and generally calculates or nominalizes its power in terms of average power.
With the development and maturity of the application of ultrasonic technology, due to the simple structure, convenient operation and maintenance, and prevention of static electricity, it has become a trend to develop the transducer from the conventional screen-based bottom-up type side-vibration.
2. Built-in bottom vibration and external side vibration technology comparison
The built-in bottom vibration type is to fix the transducer to the bottom of the screen guide ring, and transmit the ultrasonic vibration energy of the transducer to the screen; the external side vibration type fixes the transducer to the side of the screen through the extended side. The sound guiding ring transmits the vibration energy to the sound guiding ring at the bottom of the screen and then to the screen surface.
(1) Built-in bottom vibration
advantage
Directly placed at the bottom of the screen, occupying a small space and beautiful appearance;
Ultrasonic transmission loss is small, ultrasonic vibration effect is good, especially suitable for screening of very fine powder.
Disadvantage
The transducer is placed at the bottom of the screen, and it is impossible to judge the working state, and it is troublesome to maintain, disassemble, and repair normally;
The transducer is directly wrapped by the sieved powder, which is not conducive to heat dissipation, and the high temperature generated will accelerate the degradation of its performance; especially for the screening of high-temperature powder, the situation is more serious.
High temperatures can cause thermal bursts in the body's wafers. Thermally-exploded transducers can cause vicious cycles in subsequent operations and cause equipment damage, and even cause fires. This has occurred in many cases in China.
Due to the coupling of low-frequency mechanical vibration and high-frequency ultrasonic vibration, unstable and unsafe factors such as cracking, breaking, short-circuiting and sparking of the transducer wire and the rubber outer tube are caused.
The above vibration coupling is prone to microcracks at the weld seam of the sealed casing of the transducer, which causes the fine particles of the screening material to enter the cavity, causing the positive and negative electrodes of the transducer to be ignited or short-circuited, causing damage and the like.
The above vibration coupling, the screening materials will form an unstable powder friction electrostatic field with each other, and the high temperature of the transducer shell easily becomes a cause of fire and explosion caused by discharge between the powders. ------ This case has occurred in China.
(2) External side vibration

advantage

The transducer is directly placed on the outside of the screen to facilitate inspection of abnormal working conditions including wire cracking, ignition, abnormal high temperature, etc., and is cheaper than the operator's daily maintenance, maintenance, replacement and accident hazard investigation.
The transducer does not touch the powder, and the impact of various accidents caused by the transducer is basically negligible.
The transducer can dissipate heat normally, the ambient temperature is low, the performance degradation rate is slow, and the life is long, which can effectively reduce the thermal cracking phenomenon of the piezoelectric wafer and avoid a series of vicious cycles resulting in equipment damage or fire hazard.
The side displacer is sealed with a detachable soft silicone ring, which does not cause cracks in the casing and also repairs the transducer.
Disadvantage
Directly placed outside the screen side, taking up extra space;
The ultrasonic transmission loss is large, and the ultrasonic vibration effect is slightly lower than the bottom, but there is basically no influence on the powder screening of the slightly coarse mesh.
Based on the above reasons, with the development and maturity of ultrasonic technology applications, the replacement of traditional built-in bottom-vibration transducers by external side-vibration transducers has become a trend, and European and American countries have basically realized this transition.

2  Technical Parameters 

 

Model

Resonance frequency

Static capacitance 

Resonance Impendance

Power

Size(mm)

(KHz)

(pF)

(Ω)

(W)

D*H

GPV-8SH-4533 (5*2)-B

33±2.0

6800±10%

≤10Ω

80

Ø65×85

GPV-8SH-3833 (5*2)-B

33±2.0

4800±10%

≤10Ω

60

Ø58×85

GPV-8SH-3535 (5*2)-B

35±2.0

4500±10%

≤10Ω

50

Ø55×80

GPV-8SE-4530 (5*2)-S

31±2.0

6800±10%

≤10Ω

80

Ø65×130

GPV-8SE-3833 (5*2)-S

33±2.0

4500±10%

≤10Ω

60

Ø58×130

GPV-8SE-3535(5*2)-S

35±2.0

4000±10%

≤10Ω

50

Ø55×120

GPV-8SE-3030(4*4-S

31±2.0

9000±10%

≤10Ω

120

Ø55×120

GPV-8SE-2535 (4*4)-S

35±2.0

5500±10%

≤10Ω

50

Ø43×160

GPV-8AE-2535(5*2)-S

35±2.0

3500±10%

≤10Ω

30

Ø42×133

GPV-8SE-3535(5*2)-S

35±2.0

4000±10%

≤10Ω

50

Ø55×120

GPV-8SS-1540(2.5*2)-D

40±2.0

1600±10%

≤10Ω

15

Ø28×95



           
         
           
           
           
           
           
           
           
           
           
           
         


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