Wenzhou Prance Hydraulic Equipment Co., Ltd
Bomba de Pistões Variáveis de Eixo Inclinado A7VO
1.Variable pump with axial tapered piston rotary group of bent-axis design, for hydrostatic drives in open circuit
2.For use in mobile and stationary applications
3.Flow is proportional to the drive speed and displacement.
4.The flow can be steplessly changed by adjusting the bent axis.
5.Wide selection of control devices
6.Compact, robust pump with a long service life
Descrição detalhada
This is a variable pump equipped with an axial tapered piston rotary group of bent-axis design, specifically developed for hydrostatic drives in open-circuit systems. It ensures efficient power transmission and stable oil flow output, which is essential for the reliable operation of open-circuit hydrostatic drive systems. The pump is suitable for both mobile and stationary applications, such as construction machinery, agricultural equipment, and industrial hydraulic stations, adapting to different working environments and load requirements. Its flow rate is proportional to the drive speed and displacement, meaning the output flow can be flexibly adjusted with the changes of these two parameters to match actual working demands. The flow can be steplessly changed by adjusting the bent axis, enabling precise and smooth flow regulation without obvious pressure fluctuations. It offers a wide selection of control devices, including manual, hydraulic, and electric controls, to meet diverse system control needs. With a compact and robust structure, the pump has strong resistance to wear and impact, ensuring a long service life and reducing maintenance frequency and costs.
Seleção e Consulta (RFQ)
Esta série de produtos deve ser selecionada em função do circuito hidráulico aprovado. Confirme o caudal ou a cilindrada necessários, a pressão contínua e de pico, a velocidade de acionamento, o tipo de controlo, o fluido e a interface de instalação antes da seleção final.
Informação a incluir no seu pedido de cotação
- Cilindrada ou caudal necessários à velocidade de funcionamento
- Pressão do sistema contínua e de pico
- Velocidade do acionamento, requisito de controlo e tipo de circuito
- Flange de fixação, veio, pórticos, requisitos de fluido e filtração
Recursos relacionados
Código de encomenda
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | ||
| A7V | ○ | / | 63 | - | V | B | 01 |
Unidade de pistões axiais
| 01 | Bent-axis design, variable, nominal pressure 350 bar, maximum pressure 400 bar | A7V |
Modo de funcionamento
| 02 | Bomba de circuito aberto | ○ |
Tamanho (NG)
| 03 | Geometric displacement V2 (cm 3), see "Technical data" on page 7 | 28 | 55 | 80 | 107 | 160 |
| For sizes 250, 355 and 500, see data sheet 92203 | ||||||
Dispositivo de controlo
| 28 | 55 | 80 | 107 | 160 | |||||
| 04 | Power controller without power override | ● | ● | ● | ● | ● | LR | ||
| com corte de pressão | ● | ● | ● | ● | ● | LRD | |||
| com limitador de curso | controlo negativo | Δp = 25 bar | - | ● | ● | ● | ● | LRH1 | |
| with pressure cut-o ffand stroke limiter | controlo negativo | Δp = 25 bar | - | ● | ● | ● | ● | LRDH1 | |
| with pressure cut-o ffand load sensing | - | ● | ● | ● | ● | LRDS | |||
| Power controller with hydraulically proportional power override
(only available for clockwise rotation and with port plate 02) |
|||||||||
| com deteção de carga | - | ● | ● | - | - | LA1S | |||
| with load sensing and hydraulically proportional LS-override | - | ● | ● | - | - | LA1S5 | |||
| Controlador de pressão | ● | ● | ● | ● | ● | DR | |||
| comandado à distância | ● | ● | ● | ● | ● | DRG | |||
| com deteção de carga | - | ● | ● | ● | ● | DRS | |||
| Proportional control hydraulic | Positive control | Δp = 10 bar | ● | ● | ● | ● | ● | HD1 | |
| with pressure cut-off, remotely controlled | Positive control | Δp = 10 bar | ● | ● | ● | ● | ● | HD1G | |
| Proportional control electrical | Positive control | U=24V | ● | ● | ● | ● | ● | EP2 | |
Séries
| 05 | Series 6, index 3 | 63 |
Sentido de rotação
| 28 to 160 | ||||
| 06 | Visualizado no veio de transmissão | sentido horário | ● | R |
| sentido anti-horário | ● | L | ||
Material de selagem
| 07 | FKM (fluoroelastómero) | V |
Veio de transmissão
| 28 to 160 | |||
| 08 | Splined shaft DIN 5480 | ● | Z |
| Parallel keyed shaft according to DIN 6885 | ● | P | |
Flange de montagem
| 09 | ISO 3019-2; 4-hole | B |
Port plate for working lines
| 10 | SAE flange ports A and S at rear (metric fastening thread) | 01 |
| SAE flange ports A and S at side (available for power controllers LA1S and LA1S5 only, metric fastening thread) | 02 |
•= available -= not available 
= programa preferido
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | ||
| A7V | ○ | / | 63 | - | V | B | 1 |
Connector for solenoids1)
| 11 | Without connector (without solenoid, with hydraulic control only; without code) | |
| Conetor moldado DEUTSCH, de 2 pinos - sem díodo supressor | P |
Standard / special version
| 12 | Standard version (without code) | |
| Special version | -S |
•= available -= not available = programa preferido
Notas
▶Preser vation:
-Up to 12 mont hs as standard
-Up to 24 mont hs long-term
(state in plain text when ordering)
Dados técnicos
| Tamanho | NG | 28 | 55 | 80 | 107 | 160 | ||
| Cilindrada, geométrica, por rotação | Vg max | cm3 | 28.1 | 54.8 | 80 | 107 | 160 | |
| Maximum rotational speed 1) | At VG Max | nnome | rpm | 3150 | 2500 | 2240 | 2150 | 1900 |
| At Vg<0.74 x Vg máx | nmax1 | rpm | 4250 | 3400 | 3000 | 2900 | 2560 | |
| Maximum rotational speed 2) | nmax2 | rpm | 4750 | 3750 | 3350 | 3200 | 2850 | |
| Fluxo | At VG Max and nnome | qv | L/min | 89 | 137 | 179 | 230 | 304 |
| Energia | At VG Max , nnome and Δp =350 bar | P | kW | 52 | 80 | 105 | 134 | 177 |
| Torque | At VG Max and Δp =350 bar | T | Nm | 156 | 305 | 446 | 596 | 891 |
| Rotary stiffness | Vg máx to V g/2 | cmin | kNm/rad | 5 | 10 | 16 | 21 | 36 |
| Vg/2 to 0 (interpolated) | cmáx | kNm/rad | 16 | 32 | 49 | 67 | 104 | |
| Moment of inertia rotary group | JTW | kgm2 | 0.0042 | 0.0042 | 0.0080 | 0.0127 | 0.0253 | |
| Maximum angular acceleration | α | rad/s2 | 35900 | 31600 | 24200 | 19200 | 15300 | |
| Case volume | V | l | 0.5 | 0.75 | 1.2 | 1.5 | 2.4 | |
| Weight (approx.) | m | kg | 17 | 25 | 40 | 49 | 71 | |
Maximum permissible speed (limit speed)
Determining the operating characteristics
| Fluxo | qv=(Vg ∙ n ∙ ηv) / 1000 | L/min |
| Torque | T=(Vg ∙ Δp) /(20 ∙ π ∙ ηmh) | Nm |
| Energia | P=(2π ∙ T ∙ n)/60000=(qv ∙ Δp)/(600 ∙ ηt) | kW |
Key
Vg = Displacement per revolution [cm3]
Δp = Differential pressure [bar]
n = Rotational speed [rpm]
ηv = Volumetric efficiency
ηmh = Hydraulic-mechanical efficiency
ηt = Total efficiency (ηt= ηv*ηmh)
Notas
▶Theore tical values, without efficiency and tolerances;values rounded
▶Operation above the maximum values or below the minimum values may result in a loss of function, a reduced service life or in the destruction of the axial piston unit. Other permissible limit values, such as speed variation, reduced angular acceleration as a function of the frequency and the permissible angular acceleration at start (lower than the maximum angular acceleration) can be found in data sheet 90261.
1) The values are valid:
- At absolute pressure Pabs = 1 bar at suction port S
- For the optimal viscosity range of vopt = 36 to 16 mm2/s
-For hydraulic fluid based on mineral oils.
2) Maximum rotational speed (speed limit) for increased inlet pressure Pabs at suction port S and Vg < Vg máx , see diagram.