RHD调速器说明书.docx

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1、-ZEXEL-SERVICE manualPub. No. EE74E-11014CONSTRUCTION & OPERATION REPAIR & MAINTENANCEGOVERNOR model RHD M (RHD6&RHD10)WARNINGSThe foliowing definitions and warning signs are used in this service manual.These are extremely important to safe operation.AcAimoiMimportant points are described to prevent

2、 bodiiy injury and property damage. They must be fully understood before beginning governor maintenance.Improper maintenance can result in injury and property damage.MEANINGS OF MARKSThe following marks are used in this service manual to facilitate correct governor maintenance.AdViCe Procedures must

3、 performedbest possible,maintenance.Note information assisting in the best possible governor maintenance.FOREWORDThe RHD hydraulic governor is a high performance variable speed governor for use with main and auxiliary marine engines, engines for electric generators and general power engines.This ser

4、vice manual describes the construction and operation, repair and maintenance, and adjustment of the RHD6 and RHDIO hydraulic governors.The contents of the manual, including illustrations, drawings and specifications were the latest available at the time of printing.The right is reserved to make chan

5、ges in specifications and procedures at any time without notice.Bosch Automotive Systems CorporationTokyo, JapanCONTENTSPageU) FEATURES 1 SPECIFICATIONS 2 CONSTRUCTION6H OPERATION8ENGINE STARTING8NORMAL OPERATION9LOAD DECREASE10LOAD INCREASE11ENGINE STOPPING12AUXILIARY STARTlNG BOOSTER 13SPEED DROOP

6、 MECHANISM .14COMPENSATOR MECHANISM15国 ADDITIONAL DEVICES 16GOVERNOR MOTOR16PNEUMATQ CONTROLLER18HYDRAULIC CONTROLLER19固 HANDLING 20GOVERNOR INSTALLATION20HYDRAULIC FLUID20AIR BLEEDING &COMPENSATION ADJUSTMENT21LINKAGE CONNECTIONS22DAILY INSPECTION22IN-SERVICE INSPECTION22Page DISASSEMBLY 23SPECIAL

7、TOOLS.23EXPLODED VIEW 24PART LIST25PREPARATION 26DISASSEMBLY 26固 INSPECTION 319. REASSEMBLY34匝 ADJUSTMENT40SPECIAL TOOLS40PREPARATION 40OPERATION TEST.43ADDITIONAL DEVICES47回 TROUBLESHOOTING52陷 PART NUMBER EXPLANATION 53EH FEATURES1. The RHD governor has a large controlling force, despite its compac

8、t size.2. As the hydraulic fluid is contained in the governor, piping and sub-tank installation are unnecessary when installing the governor on the engine.3. As the power piston utilizes a differential system, the operating force is uniform. Moreover, it is not necessary to install a return spring i

9、n the fuel control linkage. When play in the linkage system is excessive, however, it is necessary to install a spring at the end of the system to absorb this play.4. The governor is able to rotate in either direction, and therefore it can be used without modification on engines which rotate in the

10、reverse direction.5. Because the normal operating speed is low, governor endurance is high, and gearing is simple when installing the governor on low and intermediate speed engines.6. The governor has a speed droop mechanism and a compensator mechanism, enabling it to be easily and freely adjusted.T

11、he adjustment range is very wide, enabling governor use on a wide range of engines. The governor can also be used as an isochronous governor with 0% speed droop.7. The governor bodys high tensile aluminum alloy casting makes it extremely lightweight.8. The governor can be equipped with a governor mo

12、tor, a pneumatic controller and a hydraulic controller.9. RHD6 and RHD10 governors are interchangeable. For example, if a higher pressure injection system is required or if the governors control force is insufficient to cope with the demand for increased engine output, decreased fuel consumption or

13、the use of lower quality fuel oil, then the RHDIO can replace the RHD6.10. The governor is equipped with a standardized piping connection to enable the installation of an auxiliary starting booster.11. Of the RHD10 governors main components, 80% are identical to those of the RHD6. Almost 100% of the

14、 remote control devices components are identical to those of the RHD6.1回 SPECIFICATIONSRHD6RHD10Control force5.9 J 0.6 kgf m9.8 J 1.0 kgf mOutput shaft torque q9.8 N m 1.0 kgf m15 N m 1.5 kgf mOutput shaft operation angle O3540Power piston diameter Small: 17.7; Large: 25Small: 18.6; Large: 27Control

15、led speed rangeStandard rating: 6002,000 r/min(Normal: 1,7002,000 r/min)High speed rating: 8002,400 r/min (Normal: 1,9002,400 r/min)Maximum allowable speed2,500 r/minCompensatorNeedle valve typeSpeed droop adjustment range0approx 10% (rated)Direction of rotationClockwise & counterclockwiseHydraulic

16、fluidSAE20W40 (MobiIoiI)Dry weight (lever type)5.5 kg5.7 kgGovernor drive powerMax approx 0.2 kW 0.3psApplicable enginesLow speed: up to approx 1,500 kW 2,000 ps Intermediate speed: up to approx 1,850 kW 2,500 ps High speed: up to approx 2,200 kW 3,000 psLow speed: up to approx 2,200 kW 3,000 psHigh

17、 speed: up to approx 2,950 kW 4,000 psApplicable injection pumpsPE (all types) PF1Zx18cyl PF1C, -1CDx16 (18) cyl PF1Wx12 (16) cyl PF1GD x8 cyl PF1DD x6 cylPE (all types) PF1CXx18cyl PF1WX x 16 cyi PF1GXx12cyl PF1DXx8 cyl PF1EXx6cyl#The main difference between the RHD6 and the RHD10 is the power pist

18、on. The parts adjacent to the power piston also differ.Note:1. The method of connecting fuel linkages and the amount of corresponding resistance differ depending on the size of the applicable engine and the size and number of the injection pumps.Consequently, engines with little friction loss can be

19、 used in high output engineapplications and, conversely, engines with large friction loss can only be used in applications equal to or less than those specified above.2. Simply because the governor has surplus control force does not necessarily mean that stable operation can be ensured.In order to e

20、nsure stable operation and to prevent the speed from exceeding the necessary speed, the inertia of the engine and the drive system should be as large as possible. SPECIFICATIONSThe figure below shows the RHD6 hydraulic governor (!ever type). The RHD10 has a special plug (piping connection) for auxil

21、iary starting booster installation located below the center of the name plate.Lever type68-3 -PRHDROO1 SPECIFICATIONSVoltageCycleSpeedCurrent consumptionOutputMotorACIOOV AC220V DC24VDC 10OV50/60 Hz50/60 Hz1,200/1,450 r/min1,200/1,450 r/min2,200 r/min2,200 r/min20 W20 W20 W20 W4 W4 W3 W3 WGear head

22、(speed reduction ratio)1/18, 1/30, 1/50, 1/75, 1/100, 1/150, 1/300, 1/375, 1/450, 1/600, 1/900, 1/1500Speed setting timeThe speed setting time can be determined freely by choosing from any of the above gear heads.The standard specified time, however, is approximately that shown below. Main engines:

23、2025 sec dead slow to rated speed Engines for generators: 79 sec/1 HzLimit switch adjustment range (RHD6, 10 -MOL)Standard specificationLower limit: 600 r/minUpper limit: 2,000 r/minPrior to shipment, the lower limit is set at 600 r/min, and the upper at 1,600 r/min.High speed specificationLower lim

24、it: 800 r/minUpper limit: 2,400 r/minPrior to shipment, the lower limit is set at 800 r/min, and the upper at 2,000 r/min.- # J囱 SPECIFICATIONSMCL type with governor motor5Approx 148Approx 161HJP-RHDR-003P-RHDR-004 CONSTRUCTION 7 The above figure shows a cutaway view of the RHD6 hydraulic governor.T

25、he governor is installed directly on the engine. Engine crankshaft speed is increased using a suitable gear ratio, and is then transmitted to the governor gear shaft. This rotation is transmitted to the hydraulic governors gear pump, which pressurizes the hydraulic fluid.The gear pump pumps hydrauli

26、c fluid from the governors hydraulic fluid tank in through the low pressure side of the regulating valve, and delivers the high pressure hydraulic fluid to the pilot valve. The regulating valve also regulates the pressure of the fluid pressurized by the gearpump (RHD6: 1.18 MPa 12 kfgcm25 RHD10: 1.4

27、7 MPa 15 kgfcm2) and returns excess fluid to the gear pump,s intake side.The gear pump has four check valves so that governor performance does not vary, even when the governor rotates in the reverse direction. The gear pump,s driven gear and the sleeve are unified. One end of the sleeve is connected

28、 to the governor flyweight. The pilot valve inside the sleeve is moved up and down in response to the flyweightis centrifugal force to control the flow of hydraulic fluid to the power piston, reacting promptly to variations in engine load to rotate the terminal shaft.The flyweight,s centrifugal forc

29、e is transmitted to the pilot valve by the thrust needle roller bearing. The speeder springs force is always acting against the flyweights centrifugal force. The set force of the speeder spring can be changed by moving the control lever.The flyweight assembly is an oil damper type assembly. When sle

30、eve rotation is transmitted to the flyweight, the oil acts to absorb unnecessary high frequency rotation fluctuations and enable stable output.The power piston, which controls the fuel injection quantity to the engine, is a simplemechanism which enables high stabilized output.The power piston is ope

31、rated by the hydraulic fluid to move in both the fuel increase and fuel decrease directions. The power piston rotates the terminal shaft via the guide lever and the terminal arm to directly control fuel injection quantity.In addition to having a larger diameter power piston, the RHD10 is equipped wi

32、th a piping connection to enable the connection of an auxiliary starting booster to the top of the power piston.S OPERATION#ENGINE STARTINGHigh pressure hydraulic fluid Low pressure hydraulic fluidCross section口LzPilot valve3勿夕%N/力乏Power piston一；二T口 -NP-RHDR-007When the engine is stopped, the flywei

33、ght is pushed down and closed by the force of the speeder spring. Consequently, the pilot valve is in its lowermost position.When the control lever is then moved in the fuel increase direction, the engine is rotated by compressed air, etc, the gear pump is operated through the gear shaft and the hyd

34、raulic fluid is pressurized.Because the flyweight is pushed down by the speeder spring and the pilot valve does notmove, the pressurized hydrauiic fluid passage and the passage to the power piston are open, and the hydraulic fluid pressurized by the gear pump is delivered through the pilot valve to

35、the top and bottom of the power piston.Because the ratio of the areas of the power piston subject to hydraulic pressure is 1:2, the power piston is immediately moved up (in the fuel increase direction) to move the output shaft side lever in the fuei increase direction through the system of links and

36、 facilitate engine starting.4 OPERATIONNORMAL OPERATION-9When the control lever is moved in the speed increase direction, the speeder spring is compressed by the speed control shaft. When the speeder spring force exceeds the flyweights centrifugal force, the pilot valve is moved down. Because of thi

37、s, the high pressure hydraulic fluid passage and the top and bottom power piston passages open, and the high pressure hydraulic fluid pressure moves the power piston in the fuel increase direction to increase engine speed. As the engine speed increases, the flyweight5s centrifugal force increases an

38、d the pilot valve ispulled up. At the position where the speeder spring force and the flyweightis centrifugal force balance, the high pressure hydraulic fluid passage and the bottom power piston passage are closed by the pilot valve land. Because of this, the power piston maintains this position and

39、 a constant stable speed is maintained.At this time, excess hydraulic fluid overflows through the regulating valve and is returned to the gear pumps intake side to maintain a stable hydraulic fluid pressure to the pilot valve.Bj operation#-LOAD DECREASE Fuel decreasePilot valve High pressure J二2J hy

40、draulic fluid3 Low pressure 汀;；：；：；* hydraulic fluid I I Cross sectionPower pistonUpper compensating springLower compensating springP-RHDR-009When engine load decreases, and governor rotation has increased, the flyweights centrifugal force increases and moves the pilot valve up. This opens the cente

41、r pilot port so that the hydraulic fluid in the bottom of the power piston returns to the governors hydraulic fluid tank. Consequently, the power piston is moved down (in the fuel decrease direction) by the high pressure hydraulic fluid in the top of the cylinder and the speed is decreased to the pr

42、evious balanced condition.When the power piston moves down, it compresses the speeder spring through the speed droop mechanism,s floating lever, the pilot valve moves down, and the land moves to a position where it closes the pilot port.When the power piston moves down, its downward movement is also

43、 transmitted to the compensating pushrod and piston through thecompensating spring in the power piston. Because of this, the negative pressure generated in the compensator chamber relieves the upward movement of the pilot valve, momentarily applying a force in the downward direction.The compensating

44、 effect ends when hydraulic fluid from the governor chamber flows in through the needle valve for a fixed period to restore the negative pressure in the compensator chamber to atmospheric pressure.Consequently, when the pilot port is closed by the speed droop mechanism and the compensator mechanism,

45、 the power piston and the terminal shaft stop at a new position where the fuel necessary to operate the engine at normal no-!oad speed is supplied when the engine load is cut.S OPERATIONLOAD INCREASE-#-When the engine load increases, engine speed decreases and the governor,s operation is exactly opp

46、osite to that at load decrease.Thus, the pilot valve moves down, high pressure hydraulic fluid flows into the chamber below the power piston, and the power piston moves upward in the fuel increase direction to increase the engine speed and return it to the previous balanced condition.When the power piston moves up, the speeder spring is moved upward by the speed droop mechan