Hydraulic quick stop valve Hägglunds VQCB 800

Description

• Valid for Hägglunds CA, CB, CBP, CBM
• Maximum flow 800 l/min
• Fast response time, i.e. 100 ... 150 ms
• Maximum pressure 350 bar
• Open and closed loop

Features

• Compact and robust design
• Mounted directly on Hägglunds motors

Product description

Hydraulic circuit, VQCB 800

General

The hydraulic quick stop valve VQCB is designed to stop a roll mill rolls without stopping the electric motor and without any need of a mechanical brake. The stop is done by blocking the oil flow from the Hägglunds hydraulic motor. A very short braking time is possible due to the small moment of inertia and quick response from the hydraulic valve.

Function

The high (working) pressure shall be connected to the INL port and the low (return) pressure to the OUT port on the valve. The cartridge valves (1 and 2) are controlled by the solenoid valves (3 and 4). The stop valve can be mounted to the hydraulic motor for clockwise rotation; A on valve to C on motor, or counter clockwise rotation; A on valve to A on hydraulic motor. The rotation seen viewed from the motor shaft side. Deactivated valve is indicated by an inductive sensor with high output.

Running condition

In normal operating condition the solenoid valves (3 and 4) are energized, making the valve (2) open and valve (1) closed.

Stop condition

When activating the quick stop, the solenoid valves (3 and 4) are de-energized which will open valve (1) and close valve (2). In same sequence the pump will be destroked by Hägglunds control system (Spider).

Comments

Reversed function/rotation is possible, see chapter "Mounting" - section "Installation instructions".

General instructions

• The VQCB hydraulic quick stop valve is designed to be used in open and closed circuits.

• Project planning, assembly and commissioning of components for radial piston hydraulic motor require the involvement of qualified personnel.

• Depending on operational state of the radial piston hydraulic motor or stop valve (operating pressure, fluid temperature), the characteristic may vary.

• Pressure ports:
  The ports and fixing threads are designed for the specified maximum pressure. The machine or system manufacturer must ensure that the connecting elements and lines correspond to the specified operating conditions (pressure, flow, hydraulic fluid, temperature) with necessary safety factors.

• The data and notes contained herein must be adhered to.

• Observe instruction regarding tightening torque and assembling of valve.

Connection of valve to the hydraulic motor Wrong connection causes incorrect valve stop function Ensure that the valve is connected correctly to the hydraulic motor due to rotation direction Clockwise rotation (seen from shaft side): A-connection on valve to C-connection on hydraulic motor Counter clockwise rotation (seen from shaft side): A-connection on valve to A-connection on hydraulic motor

Type code

ln order to identify Hägglunds equipment exactly, the following ordering code is used. These ordering codes should be stated in full in all correspondence e.g. when ordering spare parts.

Technical data

Overview, valve VQCB 800

Overview, valve VQCB 800 enclosed parts

Calculation (quick stop function)

With Hägglunds hydraulic roll mill drive.

General

As the rubber roll mills are manually operated the time to stop the rolles is of utmost importance.

Stopping of the roll can be calculated according to following:

φ = (π• n2 •(Jmachine + Jmotor)/(10 • Ts • Δp)) + 6 • n •ts

Example:

CB400 typical application for a rubber roll mill

n = 15 rpm

Jmachine = 350 kgm2

Jmotor = 18.3 kgm2

φ = (π•152•(350+18.3)/(10•400•350))+6•15•0.15=13.7°

Pressure loss diagram INL - OUT

Operating data

Operating data, solenoid

Wrong polarity Wrong polarity will destroy the transient supressor Ensure that the solenoid is connected correctly!

Operating data Solenoid

Contact with built-in transient supressor and indicator for electrical activation.

Electric circuit, contact

Operating data Inductive sensor - PNP Normally-open

Inductive sensor conector

Dimensions in mm

Electric circuit, inductive sensor

Dimensions

Valve VQCB 800

Dimensions in mm

Mounting

Installation instructions

Mounting the valve on Hägglunds CA and CB

The valve mounted directly on the motor.

• Remove protective cover, see chapter "Technical Data" - Table “Overview, valve VQCB 800 enclosed parts“, from motor mounting surface and clean the connection surface on the valve.

• Place the O-rings (included in delivery) in their proper position on the valve mounting surface. Use grease to keep O-ring fixed during assembling.

• Mount valve against the motor with the ports in correct position.

• Tighten the screws (8 pcs ½ UNC) torque 130 Nm.

• Restore paint finish and protect exposed surfaces.

CA valve mounting position for counter clockwise drive shaft rotation as viewed from the motor shaft side. INL port (A) on valve connected to A port on motor	CA valve mounting position for clockwise drive shaft rotatation as viewed from shaft motor side. INL (A1) port on valve connected to C port on motor

CB valve mounting position for counter clockwise drive shaft rotation as viewed from motor shaft side. INL (A1) port on valve connected to A port on motor	CB valve mounting position for clockwise drive shaft rotatation as viewed from motor shaft side. INL (A) port on valve connected to C port on motor

Mounting the valve on Hägglunds CBP and CBM together with adaptor

Notice!

Adaptor R939011952, VA 1000-15 must be ordered separately!

The valve mounted directly on the motor.

• Remove protective cover, see chapter "Technical Data" - Table "Overview, valve VQCB 800 enclosed parts", from motor mounting surface and clean the connection surface on the adaptor.

• Place the O-rings (included in delivery) in their proper position on the adaptor mounting surface. Use clean grease to keep O-rings fixed during assembling.

• Mount the adaptor on to the motor with the ports in their correct position. Tighten screws (8 pcs ¾ UNC) torque = 568 Nm. Remove protective cover from adaptor mounting surface and clean the connection surface on the valve.

• Place the O-rings in their proper position on the valve mounting surface. Use clean grease to keep O-rings fixed during assembling.

• Mount valve against the adaptor with the ports in correct position.

• Tighten the screws (8 pcs ½ UNC), torque 130 Nm.

• Restore paint finish and protect exposed surfaces.

CBP valve mounting position for counter clockwise drive shaft rotatation as viewed from motor shaft side. INL (A1) port on valve connected to A port on motor	CBP valve mounting position for clockwise drive shaft rotation as viewed from motor shaft side. INL (A) port on valve connected to C port on motor

CBM valve mounting position for counter clockwise drive shaft rotation as viewed from motor shaft side. INL (A) port on valve connected to A port on motor	CBM valve mounting position for clockwise drive shaft rotation as viewed from motor shaft side. INL (A1) port on valve connected to C port on motor

Information

Required and additional documentation

Ordering codes

Downloads

Hägglunds VQCB 800 - Hydraulic quick stop valve Data Sheet | RE15375 | 2014-12-01 | English | PDF | 1.3MB Product Groups: Hägglunds VQCB 800 / QECB, Hägglunds VQCB 800