How do I simulate a consumer in a hydraulic system?

I need to simulate a consumer. To simplyfy the system I should have a block with a variable volume flow. The pressure of the system is 18MPa and the volume flow changes, depending on the machine.

Is there a block for this case?

Thanks for the help.

Best regards.

[Sam Chak]

Hi @Emefun

What is the "keyword" used to identify the block that emulates the mechanical component in a hydraulic system? Keeping this crucial word in mind is the "key" to locating the block within the Simulink or Simscape libraries.

[Emefun]

Hey Sam, im using a flow resistance for now. But i have my problems with it, so i thought there might be another block. I think I don't get what you want to tell me

[Sam Chak]

Thank you, @Emefun. Initially, I thought you were searching for a specific block, which is why I asked for the keyword related to its function. I thought I might be able to assist you in searching for it. However, now I understand that you are using one of the Flow Resistance blocks from the Simscape library.

I must clarify that I'm not an expert in hydraulic systems. Could you please explain the connection between a consumer and the Flow Resistance block? By "consumer," I assume you mean an external input to your hydraulic system, creating a "load" that disrupts the flow within the system. Am I correct in this understanding?

[Emefun]

My idea was to use the flow resistance block as an "consumer", because the flow rate should change over time (for example like a SIN-function).

With that the pressure in my system should also change due to a higher "fluidconsumption".

Maybe you get what i try to explain. Im not good in explaining things sry

[Sam Chak]

@Emefun, I believe I understand now. It would be more efficient to inject the signal of the Consumer's flow rate directly into the hydraulic system. For instance, if the flow rate has a sine wave profile, you can use the Sine Wave block from the Source library.

Alternatively, if you can provide a rough sketch of the flow rate profile expected from a typical consumer, I can help generate the signal for you using fundamental mathematical functions.

[Emefun]

@Sam Chak i can model any signal i like with mathematical functions :). My problem is to adapt the volume flow, like a valve who controlls that, but i don't know to implement it in my hydraulik cycle

[Sam Chak]

@Emefun, I understand your point now. There should be a governing equation that describes the relationship between the volume flow and flow rate. I'm hopeful that you will gain some valuable insights by exploring this equation.

Answer 1

[Emefun]

The flow resistance block fits my idea/model