济宁东宏机械设备有限公司
Jining Donghong Machinery Co., Ltd
Quality supplier of drilling rig parts for Bomco,Lanzhou LS, Honghua, Sj petro, Rg Petro, Beijing BPM, Shenkai, Kingdream, CCDC

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Product Detail
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Drawworks Disc Brake System 
Brand: Renqiu Boke/Beijing PSK
Series: PS/PSZ/DBS
Present point: 0
Point offset: 0.0
Detail
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Hydraulic disc brake system consists of three parts: brake actuation mechanism, hydraulic power unit and control system.

These three parts are connected through hydraulic pipeline.

The hydraulic power unit is the hydraulic power supply unit, which provides necessary hydraulic power for the

actuation mechanism;

The control system is the hydraulic power control unit;

The actuation mechanism is the braking actuation unit, which consists of  braking caliper, caliper frame and friction disc, and the braking calipers include normal open service calipers and normal closed safety calipers.


This brake system has the following four functions:

1. Service Brake Through operating the handle of the brake valve, adjust the service caliper’s normal pressure on the friction disc. So

provide adjustable braking torque to the rigs to meet requirements in different working conditions, such as bit feeding, tripping etc.

2. Emergency Brake Under emergency condition, press the Red emergency brake button, the service calipers and safety calipers will all applied to realize emergency stop.

3. Over-winding Protection When the hook is lifted to a certain height with load the service brake should be actuated but not did, due to the

driller’s failure in operation and some other reasons, the over winding or colliding prevention valve will give a signal to the service calipers and safety calipers to realize emergency stop for preventing crown block accident.

4. Parking Brake When the drilling rig will stop working or the driller wants to leave the driller’s station, pulling down the parking brake handle will realize safety calipers braking to prevent the hook from sliding.

In addition, according to customer’s requirements the function of Mistaken Operation Protection can be added. What is called Mistaken Operation Protection is In case that the driller releases parking brake and emergency brake without following requirements of regulations, all braking calipers will come into braking condition to realize safety protection.



Types

Description

Values of parameters

PSZ75

PSZ65

Service

Caliper

Max.normal pressure on single side

75 kn

65 kn

Effective stroke

30mm

Permitted min. thickness of the brake pad

12mm

Profile dimension(mm)

580*415*420

570*390*400

Weight

200 kg

180 kg

Safety

Caliper

Max.normal pressure on single side

90 kn

65 kn

Max.clearance of the brake pad

1 mm

Permitted min. thickness of the brake pad

12 mm

Profile dimension(mm)

610*415*420

600*390*400

Weight

220

200

Hydraulic

system

Rated pressure

8 Mpa

6 Mpa

Working medium

In summer

L-HM46

In winter

L-HV32

Rated flow of single pump

18 L/min

Capacity of oil tank

80 L

Power of motor

2.2 kw

Capacity of the accumulator

4*6.3 L

Power of heater

1 kw

Rated flow of cooling water

2 m3/h

Profile dimension(mm)

1160*960*1220

Weight

650 kg


A. Brake Actuating Mechanism

Drawworks Hydraulic Disc Brake

1.Drum  2.Friction Disc  3. Service Capiler  4.Capiler Frame  5.Emergency Caplier  6. Mounted Base

A.1 The service caliper consists of mainly normal open single-action cylinder, disc springs, lever and brake pad

A.2 The safety caliper consists of normal closed single-acting oil cylinder, disc spring, lever and brake pad

A.3 The friction disc, which forms the brake pair with brake pad, is one of the core components. Usually, each set of product is

provided with two friction discs, which are mounted on both ends of the drawworks drum.

According to structures, friction discs are classified into three types: water cooling, air cooling and solid discs.

A.4 The caliper frame is the base of the actuating mechanism. The service caliper and the safety caliper are mounted on this base.

Usually, two provided caliper frames are mounted on the base of the drawworks, located in front of both ends of the drum.

B.The hydraulic power unit includes: oil tank assembly, pumps, control block assembly, oil filling assembly and electrical control

box.

C.The control system includes braking valve assembly, parking brake valve assembly, control valve group, pipes and pressure

meters.


Application: Used for drawworks of drilling rig ZJ120,ZJ90,ZJ70,ZJ50,ZJ40,ZJ30,ZJ20,ZJ15,ZJ10 etc.


Disc Brake parts include:


Disc AdapterBA Seal Ring  105
Disc  Body, Cylinder
Emergency Caliper AssemblyBA Seal ring 75
Main Caliper AssemblyO Ring
Caliper Support ArmPressure joints
Lower Bridge Piece Adapter of Injecting Valve
Washer One-Way Oil Injecting Valve
Bolt14   Combined Seal Washer 14
Curbed Beam Screw Plug
Upper Bridge Piece Bush
Spacer  Bolt of Cover Plate
Bush Cover Plate
Bush Bush
Brake Block Bush
Plate Assembly, Brake Pad Caliper Lever
Bush Bush
Bolt of Brake Block Bush
WasherHigh-pressure Rubber Hose
Long Bolt of Brake BlockLiquid Thermometer
Lever Assembly,   ServiceAir Filter
Pin, Brake PadElastic Coupling
Spacer 423KW Explosive-proof Motor
Pin, Caliper PivotConstant Voltage Plunger Pump
Cap ScrewOne-way Valve
Plate, Pivot Pin RetainerHigh Pressure Globe Valve, Plate Type
Pin, CylinderAccumulator
Spacer 35Automatic Flood Valve
 Pin, Emergency SupportCooler
Spring, Caliper ReturnPressure Joint
Main Service cylinder assemblyPressure Hosepipe
Pressure jointsPressure Gauge, Shock-proof
 Body, Cylinder HDX-25X10
Combined Seal Washer 18Flip Type Pressure Pipeline Oil Filter
Hollow Adapter SPX-06X25
Articulated BodyRotary Pipeline Filter
Bolt of Articulated BodyHigh Pressure Globe Valve
BA Seal Ring 125 Oil Return Filter
F3 Wiper, Rod1KW Electric Heater, Explosive-proof
A5 Dust-Proof RingHigh-pressure Rubber Hose
Working PlungerQuick Coupling
BA Seal ring 75 Hand Pump
O RingPVC  PVC Tube
 Plunger Assembly, AdjustableHigh Pressure Ball Valve
Adapter of Injecting ValveExplosive-proof Electric Cabinet
One-Way Oil Injecting ValvePilot Operated Directional Control Valve
Combined Seal Washer 14Explosion-proof Solenoid Proportional
Screw PlugPressure Reducing Valve
BushTemperature Controller, Explosion-proof
 Bolt of Cover PlatePneumatic Operated Directional Valve
Cover PlateSolenoid Valve, Explosion-proof
BushPneumatic Operated Directional Valve
BushExplosion-proof Solenoid Valve
Caliper LeverAir Supply Adapter
BushAir Supply Support
BushFrame
SpacerManhole Cover
BushA10V Pumps and Motors
Brake BlockLiquid Thermometer
BushQuick Joint
Plate Assembly, Brake Pad H3 Joint, Valve
Bolt of Brake BlockH3 Joint, External
WasherHand Pump
Long Bolt of Brake BlockPipe Filter
Pin, Brake PadExplosion-proof Electric Cabinet
42Pressure Gauge
Pin, Caliper PivotControl Valves
Cap ScrewOil Return Filter
Plate, Pivot Pin RetainerM33X2 Oil Return Filter
35Joint
Pin, CylinderAir Filter
Lever Assembly,   EmergencyTemperature Controller,
Emergency Cylinder AssemblyExplosion-proof
Bush1 Sizing Block 1, Electric Cabinet
 Pin, Emergency Support2 Sizing Block 2, Electric Cabinet
Plunger Assembly, AdjustableCooler
Bolt of Articulated BodyHigh-pressure Ball Valve
Articulated Body
Hollow AdapterElectric Heater, Explosion-proof
Combined Seal Washer 18Heater Flange
A5 Dust-Proof RingHigh-pressure Ball Valve
C2 Seal RingRc3/4  Rc3/4 Joint
Bolt of Emergency CylinderOil Tank
Screw Plug 22 Pipe Clamp
Washer 12Oil Pumping Joint
CapEmergency Brake Knob
Ring, GuideParking Brake Button
SpringRestart Button
Working PlungerJoystick
F3   F3 Wiper, RodPressure Gang
Amplifier SurppotTerminal board
AmplifierSwitch
PowerRelay
Explosion-proof box



Disc Brake Part no.:

H-05BG-06
P-04BG-82
BQ-00CBG-81
KQ-00BQ-53
J-03BG-41
J-0305BG-61
J-0304BG-72
J-0303BG-42
J-0302BG-31
J-0301BB-57
KQ-16BB-20
KQ-34BB-38
KQ-32BB-37
KQ-21BB-18
KQ-15BB-35
KQ-33BB-36
KQ-50PY-DQ-10
KQ-52PY-DQ-01
KQ-49PY-DQ-02
KB-00PY-DQ-04
KQ-11PY-DQ-07
KQ-56PY-DQ-41
KQ-10PY-DQ-09
KQ-51PY-DQ-21
KQ-14PY-DQ-22( PY-DQ-22JN)
KQ-08PY-DQ-12
KQ-55PY-DQ-13
KQ-12PY-DQ-20
KQ-48PY-DQ-17
KG-00PY-DQ-18
KQ-53PY-DQ-15( PY-DQ-15X)
KG-03PY-DQ-16( PY-DQ-16X)
KG-71PY-DQ-06
KQ-54PY-DQ-14( PY-DQ-14X)
KQ-59PY-DQ-05
KQ-58PY-DQ-27
KG-85PY-DQ-28
KG-84PY-DQ-03
KG-83PY-DQ-19
KG-02PY-DQ-11
KG-82PY-DQ-23
KG-81PY-DQ-27
KG-01PY-DQ-26
KG-41PY-DQ-38
KG-61PY-DQ-29
KG-72PY-DQ-40
KG-42PY-DQ-42
KG-31PY-DQ-10
KB-57PY-DQ-43
KB-20PY-DQ-44
KB-38PY-DQ-45
KB-37PY-DQ-46
KB-18PY-DQ-47
KB-35PY-DQ-48
KB-36PY-DQ-49
BQ-17PY-DQ-50
BQ-32PY-DQ-51
BQ-22PY-DQ-52
BQ-33PY-DQ-53
BQ-15PY-DQ-54
BQ-50PY-DQ-55
BQ-52PY-DQ-56
BQ-49PY-DQ-57
BQ-11PC-DP-04
BQ-56PC-DP-03
BQ-10PC-DP-02
BQ-51PC-DP-01
BQ-14PY-YQ-18
BQ-55PC-D-11
BQ-09PC-D-10
BB-00PC-D-09
BG-00CPC-D-08
BQ-34PC-D-07
BG-13PC-D-06
BG-01PC-D-05
BQ-58BG-45
BQ-59BG-04
BQ-54BG-05
BG-71BG-47
BG-87BG-07
BG-86CBG-88
BG-44BG-89
BG-46