SMIT Axial Piston Pumps and Motors SHPV-SHMF

7/30/2019 SMIT Axial Piston Pumps and Motors SHPV-SHMF

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AXIAL PISTON PUMPS SHPV

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SECTIONAL VIEW


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SYSTEM CIRCUIT

PUMP AND MOTOR CIRCUIT

working loop (high pressure)

working loop (low pressure)

control fluid

Above figure shows schematically the function of a hydrostatic transmission using an axial piston variable displacement pump and a

fixed displacement motor.

PUMP CIRCUIT SCHEMATIC

Designation:

1 = Variable displacement pump

2 = Charge pump

3 = Servo control valve

4 = Charge check valve

5 = Charge relief valve

6 = Filter

7 = Heat exchanger

Ports:

A, B = Main pressure ports

(working loop)

S = Suction port - charge pump

L1 , L2 = Drain ports

M = Gauge port - charge pressure

suction line

case drain fluid


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HYDRAULIC PARAMETERS

TECHNICAL SPECIFICATION

Frame size

20 21 22 23 24 25 26 27

Maximum displacement per revolution of

the variable displacement pump

cm3 33,3 51,6 69,8 89,0 118,7 165,8 227,3 333,7

[in3] [2,03] [3,15] [4,26] [5,43] [7,24] [10,12] [13,87] [20,36]

Maximum flowcm3

119,54 159,96 196,14 230,51 278,94 348,18 429,59 557,28min-1

Displacement per revolution of the charge

pump

cm3 12,30 18,03 18,85 32,80 65,50

[in3] [0,75] [1,10] [1,15] [2,00] [4,00]

Maximum pressurebar 420

[psi] [6092]

Maximum pressure of controlbar 35

[psi] [508]

Maximum pressure in casebar 2,5 continuous 5,0 intermittent

[psi] [36,3 continuous 72,5 intermittent]

Maximum speed min-1 3590 3100 2810 2590 2350 2100 1890 1670

Minimum speed min-1 500

Nominal speed min-1 1500

Kinematic viscosity range of working fluid:

starting min2 s-1 1000

operating min2 s-1 12-600

optimum min2 s-1 25-35

Kind of working fluid mineral oil

Operating temperature C -40 to +50

Maximum temperature of working fluid C 80

Purity of working fluid m 10

Direction of shaft rotation clockwise or counterclockwise

Maximum swash plate angle 18

Weightkg 45 55 63 78 124 164 212 270

[lb] [99] [121] [139] [172] [273] [362] [467] [595]


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DETERMINATION OF NOMINAL PUMP SIZE


Unit: Metric system: Inch system:

Pump output flow Q =Vg ng v

l/min Q =Vg ng v

[gpm]1000 231

Input torque M =Vg p

Nm M =Vg p

[lbfin]20 m 2 m

Input power P = Vg np kW P = Vg np [hp]600 000 t 396 000 t

Efficiency characteristic curves available on request.

Vg = Pump displacement per revolution cm3 [in3]

n = Pump speed min-1 (rpm)

p = Hydraulic pressure differential bar [psi]

v = Pump volumetric efficiency

m = Pump mechanical efficiency

t = Pump total efficiency

TECHNICAL PARAMETERS

Design

Axial piston pump of swash plate design, with

variable displacement.

Type of mounting

SAE four bolt flanges.

Pipe connections

Main pressure ports: SAE split flange

Remaining ports: SAE O-ring boss

Direction of rotation

Clockwise or counterclockwise (viewing from the

input shaft).

Installation position

Optional; pump housing must be always filled with

hydraulic fluid.

External drain fluid loss

Typical values for 350 bar [5076 psi]

and 18 swashplate angle

Driveshaft speed n (min-1) (rpm)

Externaldrainfluidloss(l/min)

(USgal/min)


6/20

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DRAWINGS

FRAME SIZE 20, 21, 22 AND 23

* Shaft spline data: spline shaft with

involute spline, according to SAE handbook,

1963, class 1, fillet root side fit.

#HARGEPRESSURERELIEFVALVE

0ORT"

0ORT3

#LOLCWISE2

ROTATION

#OUNTER

CLOLCWISE,

ROTATION

'AUGEPORTSERVOCYLINDERPRESSUREBOTHSIDES5.&"3!%STRAIGHTTHREAD/RINGBOSS

"

*

+

,

-

0ORT,#ASEDRAINPORTUSEHIGHESTPORTASOUTLET

#OUPLINGMAYNOTPROTRUDEBEYONDMMMAXIMUMLENGHTOFFULLSPLINE

3HAFTSPLINEDATA0ITCH 00RESSUREANGLE .UMBEROFTEETH20ITCH 3

(

'

&

%

$

#

!

!PPROXIMATECENTREOFGRAVITY

.

/

-

8

9

.ULLPOSITION

-AXIMUMDISPLACEMENT

-AXIMUMDISPLACEMENT

3ERRATEDSHAFT

#ONTROLHANDLE

# $

2

2

View Z


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DRAWINGS


Frame size Port A and B Port L1 and L2 Port S Port M

20 SAE flange, size 1SAE split flange boss 5000 psi

4 threads

3/8-16 UNC-2B

18 deep

7/8-14 UNF-2B

SAE straight thread

O-ring boss

7/16-20 UNF-2B

SAE straight thread

O-ring boss

21

22

23

Max. torque for charge pump inlet port (7/8 -14 UNF - 2B) is 22 - 28 Nm [195 - 248 lbfin].

View Y

6

9

0ORT"

9

0ORT!

5

#ASEDRAINPORT

7

48

5

#ASEDRAINPORT

0ORT3

3UCTIONPORTCHARGEPUMP

0OSITIONOFCHARGEPUMPFORCLOCKWISE2ROTATION

0OSITIONOFCHARGEPUMPFORCOUNTERCLOCKWISE,ROTATION

0ORT!

4

0ORT,#ASEDRAINPORT

0ORT"

'AUGEPORT-

0ORT,#ASEDRAINPORT

'AUGEPORTSERVOCYLINDERPRESSURE


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DRAWINGS


View X (for SHPV 22 only) View X (for SHPV 23 only)

View X (for SHPV 20 - 21 only)

##

''

!!

**

n

2OTATION

, 2

!PPROXCENTREOFGRAVITY

(( ((

:

:

""

&&

''

$$

%%

#ONTROLHANDLE

5.#!

#ONTROLHANDLESHAFTSPLINEDATAPITCHDIAMETRALPITCHACCTO3!%HANDBOOK/UTSIDEDIAMETER .UMBEROFTEETH

:

##

''

!!

**

n

2OTATION

, 2


(( ((

:

:

""

&&

''

$$

%%

#ONTROLHANDLE

5.#!


:

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**

n

2OTATION

, 2


(( ((

:

:

""

&&

''

$$

%%

#ONTROL

HANDLE 5.#!


:


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Information contained in this catalogue is accurate as of the publication date and is subject to change without notice.

Performance values are typical values. Customers are responsible for selecting products for their applications using normal engineering methods.

DRAWINGS


Dimensions:

Bmm

Cmm

Dmm

Emm

Fmm

Gmm

Hmm

Jmm

Kmm

Lmm

Mmm

Nmm

Frame size [in] [in] [in] [in] [in] [in] [in] [in] [in] [in] [in] [in]

20284

[11.181]

263

[10.354]

270

[10.630]

225

[8.858]

162

[6.378]

159

[6.260]

100

[3.937]

94

[3.701]

58

[2.283]

48

[1.890]

16

[0.630]

84

[3.307]

21301

[11.850]

280

[11.024]

282

[11.102]

246

[9.685]

174

[6.850]

152

[5.984]

107

[4.213]

106

[4.173]

70

[2.756]

48

[1.890]

16

[0.630]

84

[3.307]

22 315[12.402]

294[11.575]

305[12.008]

259[10.197]

188[7.402]

146[5.748]

112[4.409]

120[4.724]

84[3.307]

48[1.890]

16[0.630]

84[3.307]

23328

[12.913]

307

[12.087]

312

[12.283]

271

[10.669]

195

[7.677]

140

[5.512]

118

[4.646]

129

[5.079]

91

[3.583]

49

[1.929]

17.5

[0.689]

98

[3.858]

Tmm

Umm

Vmm

Wmm

Xmm

Ymm

Zmm

AAmm

BBmm

CCmm

DDmm

EEmm


2062

[2.441]

95.7

[3.768]

92

[3.622]

95

[3.740]

51

[2.008]

81

[3.189]

3

[0.118]

174.9

[6.886]

150

[5.906]

115.9

[4.563]

120

[4.724]

100

[3.937]

2168

[2.677]

108.7

[4.280]

102

[4.016]

108

[4.252]

53.2

[2.094]

85.8

[3.378]

6.35

[0.250]

187.6

[7.386]

162

[6.378]

128.6

[5.063]

131

[5.157]

110

[4.331]

2271.4

[2.811]

112.7

[4.437]

105

[4.134]

108

[4.252]

60.5

[2.382]

85.8

[3.378]

9.5

[0.374]

187.6

[7.386]

162

[6.378]

128.6

[5.063]

133

[5.236]

113

[4.449]

2377.7

[3.059]128.7

[5.067]115

[4.528]119

[4.685]65

[2.559]95.2

[3.748]12.7

[0.500]198.6

[7.819]173

[6.811]139.6

[5.496]144

[5.669]123

[4.843]

A1mm

Shaft splineBore diameter

for shaftcoupling[in]

FFmm

GGmm

HHmm

JJmm

Charge pumpcm3

Omm

Pmm

Rmm

Smm mm

Frame size [in] [in] [in] [in] [in]3 [in] [in] [in] [in] [in]

12

[0.732]

18

[1.098]

20117

[4.606]

113

[[4.449]

108

[4.252]

190

[7.480]

341

[13.425]

350

[13.780]

34.50- 0.17[1.358- 0.0067]

33.338

[1.313]

21

[0.827]16/32

31.75 + 0.062

[1.250 + 0.0024]

21

122

[4.803]

116

[4.567]

124

[4.882]

191

[7.520]

358

[14.094]

367

[14.449]

34.50- 0.17[1.358- 0.0067]

33.338

[1.313]

21

[0.827] 16/32

31.75 + 0.062

[1.250 + 0.0024]

22126

[4.961]

123

[4.843]

130

[5.118]

194

[7.638]

372

[14.646]

381

[15.000]

34.50- 0.17[1.358- 0.0067]

33.338

[1.313]

21

[0.827]16/32

31.75 + 0.062

[1.250 + 0.0024]

23140

[5.512]

134

[5.276]

148

[5.827]

194

[7.638]

358

[14.094]

394

[15.512]

37.68- 0.17[1.483- 0.0067]

36.513

[1.438]

23

[0.906]16/32

34.95 + 0.062

[1.376 + 0.0024]

1 Short version available on request. Please contact SMIT Hydraulics service department.


10/20

SMIT Hydraulics PHONE FAX

Via Pietro Giardini, 318 [email protected] +39 059 596 77 44 +39 059 596 08 80 (Domestic market)

41100 Modena - ITALY www.smithydraulics.it +39 059 596 77 45 +39 059 596 08 88 (International market)

S/HPV/15002


11/20


12/20

2

AXIAL PISTON MOTORS SHMF

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SECTIONAL VIEW

Outputshaft

Shaft sealCylinder blockassembly

High pressurerelief valves(adjustable)

P geurrelief valve

Valve block

Shuttle valve Swashplate


13/20

3


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SYSTEM CIRCUIT

PUMP AND MOTOR CIRCUIT

working loop (high pressure)

working loop (low pressure)

control fluid

Above figure shows schematically the function of a hydrostatic transmission using an axial piston variable displacement pump and a

fixed displacement motor.

MOTOR CIRCUIT SCHEMATIC

Designation:

1 = Fixed displacement motor

2 = Purge relief valve

3 = Shuttle valve

4 = High pressure relief valve

Ports:

A, B = Main pressure ports (working loop)

L1 , L2 = Drain ports

MA = Gauge port for port A

MB = Gauge port for port B

M = Gauge port - charge pressure

suction line

case drain fluid

A

B

L1

L2

M MB

MA

1

4

4

23


14/20

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HYDRAULIC PARAMETERS


Frame size

20 21 22 23 24 25 26 27

Maximum displacement per revolution of

the variable displacement motor

cm3 33,3 51,6 69,8 89,0 118,7 165,8 227,3 333,7

[in3] [2,03] [3,15] [4,26] [5,43] [7,24] [10,12] [13,87] [20,36]

Maximum flowcm3

119,54 159,96 196,14 230,51 278,94 348,18 429,59 557,28min-1

Maximum pressurebar 420

[psi] [6092]

Maximum pressure in casebar 2,5 continuous 5,0 intermittent

[psi] [36,3 continuous 72,5 intermittent]

Maximum speed min-1 3590 3100 2810 2590 2350 2100 1890 1670

Minimum speed min-1 500

Nominal speed min-1 1500

Kinematic viscosity range of working fluid:

starting min2 s-1 1000

operating min2 s-1 12-600

optimum min2 s-1 25-35

Kind of working fluid mineral oil

Operating temperature C -40 to +50

Maximum temperature of working fluid C 80

Purity of working fluid m 10

Direction of shaft rotation clockwise or counterclockwise

Maximum swash plate angle 18

Weightkg 30 35 40 47 70 124 152 197

[lb] [66] [77] [88] [104] [154] [273] [335] [434]


15/20

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DETERMINATION OF NOMINALMOTOR SIZE


Unit: Metric system: Inch system:

Input flow Qe =Vg n

l/min Qe =Vg n

[gpm]

1000 v 231 v

Output torque Me =Vg p m

Nm Me =Vg p m

[lbf in]20 2

Output power Pe = Qe p t kW Pe = V

g np t [hp]600 396 000

Speed n =Qe 1000 v

min-1 n =Qe 231 v

(rpm)Vg Vg

Efficiency characteristic curves available on request.

Vg = Motor displacement per revolution cm3 [in3]

n = Motor speed min-1 (rpm)

p = Hydraulic pressure differential

p = pHD

- pND

bar [psi]

v = Motor volumetric efficiency

m = Motor mechanical efficiency

t = Motor total efficiency

pHD = High pressure bar [psi]

pND = Low pressure bar [psi]


16/20

6


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TECHNICAL PARAMETERS

Design

AAxial piston motor with fixed displacement and swash plate design.

Type of mounting

SAE four bolt flanges.

Pipe connections

Main pressure ports: SAE split flange

Remaining ports: SAE O-ring boss

Direction of rotation and flow

Clockwise or counterclockwise (viewing from the output shaft).

Installation position

Optional; motor housing must be always filled with hydraulic fluid.

External drain fluid loss


Direction of rotation Port A Port B

Clockwise (R) Output Input

Counterclockwise (L) Input Output

Typical values for 350 bar [5076 psi]

and 18 swashplate angle

Driveshaft speed n (min-1) (rpm)

Externaldrainfluidloss(

l/min)

(USgal/min)


17/20

7


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DRAWINGS

FRAME SIZE 22 AND 23

View Z

View Y

* Shaft spline data: spline shaft with involute spline, according to SAE handbook, 1963, class 1, fillet root side fit.

Frame size Port A and B Port L1 and L2 Port MA and MB Port M

22SAE flange, size 1

SAE split flange boss

5000 psi

4 threads3/8-16 UNC-2B

18 deep

7/8-14 UNF-2BSAE straight thread

O-ring boss

7/16-20 UNF-2BSAE straight thread

O-ring boss23


18/20

8


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DRAWINGS


View X (frame size 22)

View X (frame size 23)


19/20

9


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Information contained in this catalogue is accurate as of the publication date and is subject to change without notice.

Performance values are typical values. Customers are responsible for selecting products for their applications using normal engineering methods.

DRAWINGS


Dimensions:

Amm

Bmm

Cmm

Dmm

Emm

Fmm

Gmm

Hmm

Jmm

Kmm

Lmm

Mmm


22378

[14.882]

290

[11.417]

255

[10.039]

165

[6.496]

108

[4.252]

86.5

[3.406]

98

[3.858]

161

[6.339]

16

[0.630]

56

[2.205]

48

[1.890]

28.4

[1.118]

Nmm

Omm

Pmm

Rmm

Smm

Tmm

Umm

Vmm

Wmm diameter for mm Weight

Frame size [in] [in] [in] [in] [in] [in] [in] [in] [in] shaft coupling [in] kg [lb]

22127

[5.000]

84

[3.307]

34.50 -0.17

[1.358 -0.0067]

8.5

[0.335]

33.338

[1.313]

21

[0.827]16/32

85.8

[3.378]

101

[3.976]

31.75 +0.062

[1.250 +0.0024]

40

[88]

23127

[5.000]

98

[3.858]

37.68 -0.17

[1.483 -0.0067]

8.5

[0.335]

36.513

[1.438]

23

[0.906]16/32

95.2

[3.748]

114

[4.488]

34.95 +0.062

[1.376 +0.0024]

47

[104]


20/20

SMIT Hydraulics PHONE FAX

Via Pietro Giardini, 318 [email protected] +39 059 596 77 44 +39 059 596 08 80 (Domestic market)

S/HMF/15003

Date post:	14-Apr-2018
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SMIT Axial Piston Pumps and Motors SHPV-SHMF

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