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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
|
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.
| 01 | 02 | 03 | 04 | 05 1) | 06 1) |
| VQC | B | 800 |
| 01 | Hydraulic quick stop valve VQC | VQC |
| 02 | Version | B |
| Nominal flow | ||
| 03 | 800 l/min | 800 |
| Control voltage | ||
| 04 | Standard 24 VDC | 1 |
| 110 VAC (not in combination with QEC) | 2 | |
| Modification | ||
| 05 1) | 0 ... 9 | |
| Design | ||
| 06 1) | Standard | 00 |
| Special index (Customer specific adaption) | 01 ... 99 | |
| 1) | To be filled in by Bosch Rexroth AB, Mellansel. |
Technical data
| Maximum operating pressure | bar | 350 |
| Pilot pressure | bar | 7 ... 350 |
| Maximum flow | l/min | 800 |
| Pilot valve interface | NG6 | |
| Temperature range | °C | -25 … +70 |
| Viscosity range | mm²/s | 20 … 380 |
| Weight | kg | 57 |
Overview, valve VQCB 800
Overview, valve VQCB 800 enclosed parts
| Position | Description | Pcs |
| 1 | Solenoid valve | 2 |
| 2 | Inductive sensor | 1 |
| 3 | O-ring 40.87x3.53 NBR90 | 4 |
| 4 | Screw ASME B18.3-1/2-13UNC-2AX6 1/2 | 8 |
| 5 | Protective cover | 2 |
| 6 | Valve | 1 |
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 | Stop angle | ° |
| n | Speed | rpm |
| Jmachine | Moment of inertia machine | kg•m2 |
| Jmotor | Moment of inertia motor | kg•m2 |
| Ts | Specific torque | Nm/bar |
| Δp | Pressure over motor | bar |
| ts | Response time hydraulic valve | s |
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
|
Operating data Solenoid
| Supply voltage | VDC | 24 |
| Power consumption | W | 30 |
| Electric contact | DIN 43650 |
Contact with built-in transient supressor and indicator for electrical activation.
Electric circuit, contact
Operating data Inductive sensor - PNP Normally-open
| Supply voltage | Ub | VDC | 10 … 30 |
| Rated operational voltage | Ue | VDC | 24 |
| Voltage drop Ud at le | Ud | V | ≤ 2.5 |
| Rated operational current | le | mA | 200 |
| IEC 60529 protection | IP | IP68 | |
| Connection | M12x1 | L=3 m |
Inductive sensor conector
Dimensions in mm
| A | mm | 30 |
| B | M12x1 | |
| C | mm | 56 |
| L | m | 3 |
Electric circuit, inductive sensor
| 1 | Brown (1) |
| 2 | Black (4) |
| 3 | Blue (3) |
Dimensions
Valve VQCB 800
Dimensions in mm
| 1 | Not painted area |
| Position | Type of connection | Dimensions |
| A | OUT | SAE 1 1/2“ |
| B | A, A1, C, C1 | SAE 1 1/4“ |
| C | T | G 1/4“ |
| D | Thread | 5/8“ UNC depth 32 mm |
| E | INL | SAE 1 1/2“ |
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
| Title | Document no | Document type |
| Installation and maintenance manual, Hägglunds CA | EN411-18h | Instruction |
| Installation and maintenance manual, Hägglunds CB | EN683-6BR | |
| Installation and maintenance manual, Hägglunds CBP | EN818-6BR | |
| Installation and maintenance manual, Hägglunds CBM | RE 15300-WA |
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 |
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