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IS 14602 (1999): Installation methods of positivedisplacement hydraulic pumps and motors - Guidelines [PGD16: Fluid Power]

IS14602:1999

Indian Standard

INSTALLATION METHODS OF POSITIVE DISPLACEMENT HYDRAULIC PUMPS

AND MOTORS - GUIDELINES

ICS 23.100.10

Q BIS 1999

BUREAU OF INDIAN STANDARDS 9 MANAKBHAVAN, 9 BAHADURSHAHZAFARMARG

NEW DELHI 110002

January 1999 Price Group 1

HydmulicFl~dPower Systems Sectional Committee, PE 15

FCREWORD

This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Hydraulic Fluid Power Systems.Sectional Committee had been approved by the Production Engineering Division Council.

In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. Pumps convert rotary mechanical input power into output fluid power. Motors convert input fluid power into output rotary mechanical power.

This standard has been formulated based on the current manufachuing practices prevalent in the fluid power industry.

For the purpose ofdeciding whether a particular requirement of this standard is complied with the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 : 1960 ‘Rules for rounding off numerical values (revised)‘. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

Indian Standard

IS 14602 : 1999

INSTALLATION WTHODS OF POSITIVE DISPLACEMENT HYDRAULIC PUMPS

AND MOTORS -GUIDELINES

1 SCOPE

1.1 This standard provides guidelines for installation procedures of single, double and triple type fixed and variable displacement pumps and motors (hereinafter referred to as elements) under controlled conditions of installation and operation for better performance and higher life of the elements.

1.2 Purpose

a) To establish standard installation methods

b) To accomplish proper elements application

2 REFXDENCPS

The following standards contain provisions which through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below:

IS No. Title

10129 : 1982 Dimensions and identification code for mounting flange and shalt end for hydraulic fluid power positive displacement pumps and motors

10416 : 1992 Fluid power systems and components - Vocabulary (first revision)

11147: 19&Q Recommendation for parameter definitions and letter symbols for hydraulic fluid power pumps, motors and integral transmissions

3 DEPINITION AND SYMBOLS

For the putpose of this standard, the definitions given in IS 10416 and IS I1 147 shall apply. The dimensions and identification code for mounting flanges and shaft end for the elements shall be as given in IS 10129.

4 INSTALLUIONPOSITfONS

4.1 The preferred installation position is that in which the leakage line of the element is at the highest point. This will ensure that the housing always remains filled with oil.

1

4.2 If the installation position cannot be designed as in 4.1, then adequate measures shall be taken to ensure that the oil does not drain out of the housing. providing a back pressure valve is one way of achieving this.

4.3 The installation shall be such that easy maintenance is possible.

5 INSTALLAllON LOCATION

5.1 Installation Inside the Tank

5.1.1Wheninstalledinsidethetankitshouklbeensured that the element housing always remains filled with oil. Aspects like the minimum oil level when the vehicle (for mobile application) is tilted should be considered for this.

5.1.2 A conical suction pipe attached to the suction port will eliminate the sudden change of flow direction at the inlet.

5.1.3 Elements used for installation inside the tank should have a port on the housing for allowing the enttyofoilintothehousingandanotherportforbleeding through a hose attached to it. The end of the hose should be outside and above the tank. This end should be plugged afler bleeding so that air is not sucked in.

5.1.4 The leakage line should be piped to carry the hot oil flowing out, away from the element.

5.2 Installation on the Tank

5.2.1 In this case make sure that the suction pressure is within acceptable limits. Refer Section 6 for this.

5.2.2 The pump housing has to be filled with oil before commissioning.

5.2.3 Adequate measums should be taken to ensure that the oil does not drain out of the element eqecially during long idle time (see also 4.2).

5.3 Installation Outside the Tank

5.3.1 It is essential that the pump casing be filled with oil before starting. The pump must be installed such that the bleeding screw which helps in purging of air from the pump casing is at the topmost point.

5.3.2 In cases where pump is installed such that the pump C/L is vertical, ensure that the bleeding screw is accessible in assembly for purging air.

9

ls14602:1999

54 Installation on Gear Boxes

5.4.1 Be&we installation the spigot location diameter on the gear box should be checked and ensured so that there is no play after installation.

5.4.2 It should also be ensured, by measurement of the geatbox parts, that during tightening of the mounting bolts, the element patts do not get loaded by interference.

5.4.3 The intermediate flanges if used should be designed such that the correct installation position is ensured.

5.5 In all cases adequate additional support shall be provided for double and triple pumps as per the manufactumr’s recommendation.

6 SUCI’IONLINE

6.1 The suction line should be as straight and short as possible.

6.2 The suction pressure should not fall below 0.8 bar (abs). Pmmmisation of the tank or raising of the oil level may be done to raise the suction pressure.

6.3 The suction pressure should not rise above 1.5 bar (gauge) or manufacturer’s specified limit. Higher pressmes can damage the housing and shaft seal.

6.4 The suction lines should be m&ant to deformation by external pressure.

6.5 There should not be any kinks in the suction line.

7 EIGEPRESSURELINES

7.1 The pressure lines should have strength to withstand at least 4 times the system pressure.

7.2 The relief valve should be installed as close to the pump as possible.

8LEAKAGELINE

8.1 The layout of the leakage line should be such that the housing always remains filled with oil.

8.2 The pressure at the leakage port should be between 0.8 bar (abs) and 1.5 bar (gauge) or within the manufacturer’sspecifiedlimit.

8.3 It may be necessary to install back pressure valve in the line to ensure minimum pressme when the oil level is below the element.

8.4 The leakage line should enter the tank below the minimumoillevel.

9 TYPE OF PIPING

Rigid piping between the elements and other components will impose mechanical loads and hence should be avoided.

10 GAUGECONNECITONS

Easily accessible gauge connections in the circuit simplifies pressure measmeme nt during commissioning and trouble shooting.

11 COUPLINGS

11.1 While using flexible coupling, gears, chains, belts and splined shafls, the radial and axial loads should not exceedthe limitpermittedbytheman~cturer.

11.2 The speeds shall not exceed that specified for the coupling or for the elements.

11.3 The couplings shall be drawn on to the drive shaft using the threaded hole in the end of the drive shalt. Avoid hammering or jolting.

11.4 The flexible couplings should be checked for freedom from resonance.

11.5 In the case of universal drive shafts both shaft ends shall be rectangular. The swivel joints must lie in one plane. The angles shall be limited to lo” ( see Fig. 1).

FIG. 1

11.6 Misalignment of the element shaft and rigid couplings shall be controlled within limits specified below: .

-of&etmisalignmentshallbewithino.1 (seeFig.2).

1

FIG. 2

-Angular misaligmnent shall be within lo (see Fig. 3 )

11.7 The couplings shall be adequately guarded.

FIG. 3

2

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This Indian Standard has been developed from Dot : No. PE 15 ( 5501 ).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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