I am having one Sundstrand hydrostatic transmission. I want to use only hydraulic winch for vehicle recovery vehicle. The winch is not having brake system. At neutral position, the winch drum rotates freely. I need brake system when the hydraulic motor stops rotating with load.

Is it possible to provide brake system for this hydraulic winch. This winch is 10 ton pulling capacity. May be this winch was used in marine application.

Is it possible to provide brake system for this?

Simply add a "Spring Set" "Hydraulic Release" Brake to the Hydraulic Motor output drive shaft to the winch. Use a Shuttle Valve with its Inputs connected to the Forward and Reverse flow lines of the Motor Ports and its Output connected to the Brake Release Port.

Common Brake Circuit for stopping and holding a load powered by hydrauic motors.

Some use an Orifce in the Brake Release line with free flow one direction to allow the brake to release quickly but set slower, without a sudden lock up.

Thanks for your solution.

The hydraulic winch is having a hydraulic motor on both sides. It is very difficult to fit a srping set for the winch. Is it possible to give solution about the fitment. Also please give us the details of the co providing seperate spring set for hydraulic winch.

The following line I have not understood clearly. Can you explain it briefly please!
Some use an Orifce in the Brake Release line with free flow one direction to allow the brake to release quickly but set slower, without a sudden lock up (This means I vave to fit Flow control valve).

Here is a link to a product I have Spec'd for Load Holding circuits using hydraulic motors.

www.auscoproducts.com

A Google search for "Spring Set+Hydraulic Relese+Brake" brought up many companies web sites.

"The following line I have not understood clearly. Can you explain it briefly please!
Some use an Orifce in the Brake Release line with free flow one direction to allow the brake to release quickly but set slower, without a sudden lock up (This means I vave to fit Flow control valve)."

This is a precaution I have used to keep the brake from operating so fast when the Hydraulic Motor stops getting a oil flow to make it run that it locks the Brake with a HARD JERK/QUICK STOP/OPERATOR EJECTING JOLT/LINE SNAPPING STOP.

It allows a soft stop since it Meters Out the oil that released the Brake quickly through the Flow Ontrols Bypass Check Valve.

I only found one Flow Control that has fine enough adjustment to make this easy to set up. They were rated in Cubic Inches Per Minute flow with many turns from Shut to Full Flow. Look at Parker TPC Flow Controls.

Thanks. I got it. But both the sides of the winch, hydraulic motor is their. How can I couple the brake+spring set to the winch. Can you give some Idea about this.

My input to almost every circuit design had nothing to do with the physical aspects of the machine. The machine was designed and components were specified, all anyone wanted was a way to make the actuators function in a specified way. How the parts of the application were assembled was left to the builder.

I always asked for enough information about the physical parts that kept me from trying to apply a non-working or machine damaging solution to the situation.

Some hydraulic motors come with an optional Thru Shaft and this Thru Shaft is often used with a brake attached on the back of the hydraulic motor.

Thanks. But in my case there is no option for this also.

Bud,

I am working on a reeler (similar to winch) and quite liked the idea of using the orifice in the brake release line. Just to confirm why it is used :

To allow the motor + drum to stop first and then allow the brake to come on as the brake is only intended to be a park/static brake then dynamic.


Also can you please suggest any flow control i can put to control 15 cm3 of oil which is required to release the brake.

I tried looking for Parker TPC range but couldn't find one small enough to handle small volume of 15 cm3

Thanks,

Losty

quote:

Originally posted by Lost_in_aust:
Bud,

quote:

I tried looking for Parker TPC range but couldn't find one small enough to handle small volume of 15 cm3

Try this:

http://www.theleeco.com/LEEWEB...F/AeroStart!OpenPage

Doug,

Thanks for the information. Will look into it.