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HL-A4VG type axial piston variable pump



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product description

product description

Features:

Hydraulic components for mobile machinery;

Swashplate axial piston variable pump, suitable for closed loop hydraulic drive of mobile machinery;

The flow rate of the hydraulic pump is proportional to the speed and displacement of the pump;

Stepless variable can be achieved by adjusting the angle of the swash plate;

When the swash plate swing angle passes through the zero position, the liquid flow changes smoothly;

Two relief valves on the high-pressure side protect the hydraulic components [pumps and motors] from overloading;

Built-in auxiliary pump as oil supplement and control oil pump;

The maximum charge pressure is limited by the built-in charge relief valve;

The rated working pressure can reach 40MPa;

Choose long-life, high-precision bearings;

Use Parker seals;

1. Model description

Axial plunger element
Variable pump, swash plate structure, for mobile machinery								A4V
Operating mode
Pump, closed circuit								G
specification
△Displacement Vg max(ml/r)		28	40	56	71	90	125
Control Method[★: In stock; ☆: In preparation; —: Out of stock]
Mechanical servo		☆	☆	★	★	★	☆	HW
Related to speed U=12VDC		☆	☆	☆	☆	☆	☆	DA1
Related to speed U=24VDC		☆	☆	☆	☆	☆	☆	DA2
Related to pilot pressure No oil supply filter		☆	☆	☆	☆	☆	☆	HD1
Related to pilot pressure with oil supply filter		☆	☆	☆	☆	☆	☆	HD3
With proportional solenoid U=12VDC		☆	☆	☆	☆	☆	☆	EP1
Without oil supply filter U=24VDC		☆	☆	☆	☆	☆	☆	EP2
With proportional solenoid U=12VDC		☆	☆	☆	☆	☆	☆	EP3
Without oil supply filter U=24VDC		☆	☆	☆	☆	☆	☆	EP4
Electromagnet with switch
With pressure shut-off valve [standard]		☆	☆	★	★	★	☆	D
Zero switch [Only applicable to HW]
No zero switch [no mark]		☆	☆	★	★	★	☆
With zero switch		☆	☆	★	★	★	☆	L
Mechanical stroke limiter
No mechanical stroke limiter [no mark]		☆	☆	★	★	★	☆
With mechanical stroke limiter, externally adjustable		☆	☆	★	★	★	☆	M
Positioning pressure port [×3×4]
No oil port×3,×4 [no mark]		☆	☆	★	★	★	☆
With oil port×3,×4		☆	☆	★	★	★	☆	T
DAControl valve
No DA control valve		☆	☆	★	★	★	☆	1
With DA control valve, fixed setting value		☆	☆	★	★	★	☆	2
With DA control valve, can be used and can be adjusted mechanically with a control lever	Clockwise	☆	☆	☆	☆	☆	☆	3L
	Counterclockwise	☆	☆	☆	☆	☆	☆	3R
series
Serial Number		☆	☆	★	★	★	☆	32
turn around
Seen from the shaft end		Clockwise						R
		Counterclockwise						L
Seals
Nitrile rubber, shaft sealing ring is fluorine rubber								N
Shaft extension
Spline shaft DIN 5480	For single pump	☆	☆	★	★	★	☆	Z
Spline shaft DIN 5480	For combination pump	—	☆	★	★	★	☆	A
Spline shaft ANSIB92.La	For single pump	☆	☆	☆	☆	☆	☆	S
Spline shaft ANSIB92.La	For combination pump	—	—	☆	☆	—	☆	T
Mounting flange		28	40	56	71	90	125
SAE J744—2 holes		☆	☆	★	—	—	—	C
SAE J744—2 holes+4 holes		—	—	—	★	★	☆	F
Working port
SAE flange port	S port is on the lower side	—	☆	★	★	★	☆	02
A/B on the upper and lower sides	S port is on the upper side	—	☆	★	★	★	☆	03
SAE flange port	S port is on the lower side	☆	—	—	—	—	—	10
A/B on the same side	S port is on the upper side	☆	—	—	—	—	—	13
Charge pump
No built-in charge pump	No thru drive	☆	☆	★	★	★	☆	N00
No built-in charge pump	Through shaft drive	☆	☆	★	★	★	☆	K..
Has a built-in charge pump	No thru drive	☆	☆	★	★	★	☆	F00
Has a built-in charge pump	Through shaft drive	☆	☆	★	★	★	☆	F..
Through shaft drive
Flange SAEJ744 spline bushing		28	40	56	71	90	125
82-2(A)	5/8in 9T 16/32DP	☆	☆	★	★	★	☆	.01
101-2(B)	7/8in 13T16/13DP	☆	☆	★	★	★	☆	.02
101-2(B)	1in 15T 16/32DP	☆	☆	★	★	★	☆	.04
127-2(C)	1in 15T 16/32DP	—	☆	—	—	—	—	.09
127-2(C)	11/4in 14T 12/24DP	—	—	★	★	★	☆	.07
152-2/4(D)	W35×2×30×16×9g	—	—	—	—	★	—	.73
152-2/4(D)	13/4in 13T 8/16DP	—	—	—	—	—	☆	.69
Built-in valve	Predetermined area	28	40	56	71	90	125
High pressure relief valve, pilot type	10～42MPa with bypass valve	—	—	—	★	★	☆	1
High pressure relief valve, direct control	10～42MPa without bypass valve	☆	☆	★	—	—	—	3
	10～42MPa with bypass valve	☆	☆	★	—	—	—	5
	10～25MPa without bypass valve	☆	☆	★	—	—	—	4
	10～25MPa with bypass valve	☆	☆	★	—	—	—	6
filter
Filter in the suction line of the charge pump		☆	☆	★	★	★	☆	S
Filter in the pressure pipe of the charge pump, and filter the oil port of the external charge circuit [fe and fa]		☆	☆	★	★	★	☆	D
Swing angle indicator		28	40	56	71	90	125
No swing angle indicator [no mark]		☆	☆	★	★	★	☆
Electronic swing angle indicator		☆	☆	☆	☆	☆	☆	R
Note: ★: In stock; ☆: In preparation; —: Out of stock

2. Specification

Output flow: Q=Vg.n.ηv/1000 L/min
Torque: M=1.59Vg.△P/10ηmh N.m
Power: P=M.n/9549=Q. △P/60ηt kW
Note: Vg=displacement mL/r △P=pressure difference MPa n=speed rpm
ηv = volumetric efficiency ηmh = mechanical efficiency ηt = point efficiency

3. Technical parameters

3.1 Performance parameters[The following data does not consider mechanical efficiency and volumetric efficiency]

specification	28	40	56	71	90	125
Variable pump displacement Vg_maxcm³/r	28	40	56	71	90	125
Charge pump displacement Vg Scm³/rP	6.2	8.8	11.8	19.8	19.8	28.5
Speed n_maxrpm	4200	4000	3600	3300	3000	2800
Minimum speed n_minrpm	500	500	500	500	500	500
Maximum flow when n=n_maxL/min	117.6	160	201.6	234.3	270	350
Maximum power when n=n_maxv=Vg_max (△P=40MPa)KW	78.4	106.6	134.4	156.2	180	233.3
Maximum torque when V=Vg_max△P=40MPaNm	178	254.4	356	451.5	572.4	795
Shell oil volume VL	1	1.1	1.5	1.5	1.5	2.2
weightKg	30	32	39	50	61	82

3.2 Working pressure range of hydraulic pump

3.2.1 Working pressure range of imported oil [auxiliary pump]
Suction pressure Ps min: ≥0.08MPa absolute pressure
3.2.2 Working pressure range of working circuit port

a. Variable pump

Nominal pressure P=40MPa Peak pressure Pmax=45MPa Total pressure [Pressure A+Pressure B]=70MPa

b auxiliary pump

Maximum pressure P=4MPa

3.2.3 Pressure range of leakage port

Short-term [t﹤0.1s] allowable maximum pressure: P=0.6MPa
When working normally and for a long time, the case drain pressure P≦0.3 MPa

Precautions:

a. During trial operation, the pump body must be filled with oil and kept full during work.
b. In order to reduce noise, all connecting pipes are recommended to be isolated from the fuel tank with flexible components.
c. When the hydraulic pump is continuously running at the rated pressure or the inter-peak pressure, auxiliary devices are required to cool the oil to ensure that the oil temperature does not exceed the specified range, and the temperature at any point in the oil circuit must not exceed 115°C.

Four, implementation standards

JB/T 7043-2006 hydraulic axial piston pump

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HL-A4VG type axial piston variable pump

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