A7V oblique axis variable pump

A7V variable piston pumps are able to withstand high working pressure, and at the same time, they are characterized by small size, light weight and high rotational speed, which are suitable for all kinds of harsh working environments. Its high-efficiency rotary assembly and spherical oil disk design can realize auto-centering, reduce circumferential speed, reduce noise and improve working efficiency. And compact structure, suitable for open circuit hydraulic transmission system.

Mainly used in construction machinery, petroleum equipment, forging equipment and other industrial hydraulic systems, has a wide range of application areas

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Product features

◉ Bent axis design: Variable displacement pump, axial piston, bent axis design, for hydrostatic transmissions in open circuits.

◉ Flow regulation characteristics: The flow if proportional to the drive speed and the displacement and is steplessly variable at constant drive speed.

◉ Comprehensive control functions: Comprehensive programme of control devices for every control and regulation function.

◉ Applicable fluid types: Operation of both mineral, and fire-resistant fluids.

◉ Advantages of Rotating Group: High performance rotary group with well-proven spherical control area offering the following advantages; self-centering, low peripheral speed, high efficiency.

Specifications

Theoretical values,without considering mech-hyd.and volumetric efficiency

Specification	Size			20	28	40	55	58	80	78	107	117	160	250	355	500
Variable mode	control Device
LV constant power variable	Constant HP control			●	●	●	●	●	●	●	●	●	●	●	●	●
LVS constant power load sensing variable Constant HP control with load sending												●
DR Constant pressure variable	Constant pressure control			●	●	●	●	●	●	●	●	●	●	●	●	●
DRS constant pressure load sensing variable Constant pressure control with load sending												●
HD hydraulic control variables	Hydraulic control			●	●	●	●	●	●	●	●	●	●	●		●
EP electronic control is a convenient variable	Electric control(Proportional)					●	●	●	●	●	●	●	●	●		●
MA manual variable	Manual control			●	●	●	●	●	●	●	●	●	●	●
SC Brake variable	Brake control											●	●	●
Displacement		Vgmax	ml/r	20.5	28.1	40.1	54.8	58.8	80	78	107	117	160	250	355	500
Displacement		Vgmin	ml/r	0	8.1	0	15.8	0	23.1	0	30.8	0	46.2	0	0	0
Max.speod	0.09MPa1	nmax0.09	r/min	3800	2800	3200	2360	2850	2120	2540	1900	2240	1650	1400	1250	1120
	0.1MPa1	nmax0.10	r/min	4100	3000	3400	2500	3000	2240	2700	2000	2360	1750	1500	1320	1200
	0.15MPa1	nmax0.15	r/min	4750	3600	3750	3000	3350	2750	3000	2450	2650	2100	1850	1650	1500
Max.flow²	nmax0.09	Qmax0.09	L/min	76	76	124	125	161	164	192	197	254	256	340	430	543
	nmax0.1	Qmax0.1	L/min	82	82	132	133	170	174	204	208	267	271	364	455	582
	nmax0.15	Qmax0.15	L/min	94	98	146	160	190	213	227	254	300	326	449	568	728
Max.Power (△p=35MPa)	Qmax0.09	Pmax0.09	KW	45	46	75	75	97	99	116	119	153	154	204	259	326
	Qmax0.1	Pmax0.1	KW	49	49	80	80	102	105	123	125	161	163	218	273	350
	Qmax0.15	Pmax0.15	KW	57	59	88	96	114	128	136	153	181	196	270	342	437
Flow Q²	NE=1450r/min		L/min	28.8	39.5	56.4	77.1	82.3	112.5	109.7	150.5	164.6	225	—	—	—
Power P(△p=35MPa)	NE=1450r/min		KW	17	24	34	46	50	68	66	91	99	135	—	—	—
Power P(△p=35MPa)	NE=1450r/min		KW	17	24	34	46	50	68	66	91	99	135	—	—	—
Torque M（△p=10MPa)	Vgmax		Nm/10MPa	32.6	44.6	63.7	87	93.2	127.5	124	169.7	186	254	397.5	564.5	795
Torque M（△p=10MPa)	Vgmin		Nm/11MPa	—	12.9	—	25.1	—	36.8	—	49	—	73.5	—	—	—
Maximum torque(△p=35MPa)	Vgmax		Nm	114	156	223	305	326	446	431	594	651	889	1391	1975	2782
Max.torque Mm	Vgmin		Nm	—	45	—	88	129	129	—	171	—	257	—	—	—
Moment of inertia		J	kgm²	0.0017	0.0017	0.0052	0.0052	0.0109	0.0109	0.0167	0.0167	0.0322	0.0322	0.088	0.1600	0.2700
Weight			kg	19	19	28	28	44	44	53	53	76	76	105	165	245
1) The value shown is the absolute pressure at the suction port S and works with mineral oil at V gmax.
2) Calculated with a volumetric efficiency of 97%.
3) Even at higher loads, the maximum speed must not exceed the value at 0.15 MPa, but for those specifications where Vgain>0: 28-20,55-40,80-58,107-78,160-117, the maximum speed can be raised to the value of those specifications where Vgmin=0 by reducing the displacement (V.