DE20120518U1 - vibration filter - Google Patents

Description

3006 GM

Vibration filters for solid-liquid separation

The innovation relates to a device for solid-liquid separation according to the preamble of the first claim.

The innovation can be used wherever small solid particles need to be separated from a liquid. This is particularly the case in the machining industry, where coolants and lubricants are used and contamination is caused by machining processes, such as milling, turning and grinding. The resulting chips or contamination must be recovered from the water emulsion or oil so that it is available for the cooling process in the circulating process. Various methods are known for this. For example, it is common to guide such chips or contamination over sieve bottoms in the pipe system. This causes problems, especially with very fine chips, as these sieves become clogged or have very low throughputs.

In order to remove fine substances from the solid-liquid mixture, filters that are operated with paper or another filter medium are conceivable. This option has the disadvantage that the filter paper has to be changed constantly, which has a negative impact on the economic result. Ultrasonic sieves are known at least from test sieve technology for separating very fine particles. In these sieves, a sieve surface of small diameter is set into vibration using ultrasound. The sieve surfaces are arranged flat and have a low throughput.

The aim of the innovation is therefore to create a way to achieve solid-liquid separation of very small particles in a continuous operation and with a higher throughput.

This object is achieved by a device according to the features of the first claim.

Subclaims reflect an advantageous embodiment of the innovation. The solution according to the invention provides a device for solid-liquid separation, in which the material to be screened, for example contaminated coolant, is fed via an inlet to the lowest point of a screen. The screen, a vibrating screen, is mounted freely on spring blocks and is driven by at least one, preferably two unbalanced motors. The unbalanced motors can be vibration motors, which are most advantageously mounted above the screen surface. The screen mounted on the spring blocks in a frame has an inclination opposite to the transport direction of the material to be screened,

3006 GM

Chambers are arranged beneath the sieve bottom in which rubber bodies are located, which clean the sieve surface and accelerate the sieving process through their movement. A cleaning tank is arranged beneath the sieve surface, which is used to collect the cleaned liquid. The sieved solid particles migrate over the sieve surface during the sieving process and are removed at the highest point of the sieve surface via a discharge device. The mesh size of the sieve depends on the material to be sieved and should be above 20 micrometers. A mesh size between 20 and 500 micrometers is advantageous for sieving fine particles. It can also be advantageous to arrange several sieve bottoms one above the other. The innovation is explained in more detail below using two figures and an example. The figures show:

Figure 1: Section A-A of Figure 2

Figure 2: Top view of a vibration filter

Figure 1 shows a section A-A from Figure 2 through the innovation. In the example, the device is to be described as a coolant cleaning system. The coolant 1 is distributed via a distributor 2, which is located above the sieve 4, to the lowest point of the sieve surface, which is inclined against the transport direction of the material being sieved and is mounted on springs 6. The sieve 4 is set into vibration by an oscillating device 3, which represents a rigid connection to two unbalanced motors 5. These vibrations cause the solid particles, for example chips or other contaminants, to migrate up the sieve surface 4 to the highest point, where a discharge device 7 is arranged. The liquid to be cleaned passes through the mesh of the sieve 4 into the clean tank 8 and is drained off through a drain 9. Figure 2 shows the innovation from above. With the device described, a throughput of approx. 30 liters per minute can be achieved with a mesh size of approx. 30 micrometers. What is essential for this throughput is that rubber bodies are located below the sieve surface (4), in chambers arranged for this purpose, which accelerate the sieving process and clean the sieve surface (4).

List of reference symbols

1 Intake 2 Distributor 3 Oscillating device 4 Sieve/sieve area 5 Unbalance motor 6 Feather 7 Drop-off device 8th Clean tank 9 Sequence

Claims (5)

1. Vibration filter for solid-liquid separation, consisting of a sieve surface in a frame and a vibration generator, in particular for use in the machining industry, characterized in that the material to be sieved ( 1 ) is fed via an inlet ( 2 ) onto the lowest point of a sieve ( 4 ) which is driven by an unbalanced motor ( 5 ) and is arranged in a frame with an inclination counter to the transport movement of the material to be sieved on a spring suspension ( 6 ), wherein below the sieve bottom ( 4 ) there are rubber bodies in which there are located which, through their movement, accelerate the sieving process and clean the sieve surface, and below the sieve ( 4 ) there is a cleaning tank ( 8 ) for collecting the cleaned liquid. 2. Device according to claim 1, characterized in that several sieve bottoms ( 4 ) with chambers and rubber bodies are arranged one above the other. 3. Device according to claims 1 and 2, characterized in that the mesh size of the sieve covering ( 4 ) is between 20 and 500 micrometers. 4. Device according to claims 1 to 3, characterized in that two unbalance motors ( 5 ) are arranged above the sieve ( 4 ) to operate the sieve ( 4 ). 5. Device according to claims 1 to 4, characterized in that a discharge device ( 7 ) for the sieve overflow is arranged at the highest point of the sieve ( 4 ).