The difference between inclined axial piston pump and inclined disk type

斜轴式轴向柱塞泵发展较早，构造成熟。与斜盘式轴向柱塞泵相比，有如下特点：

The oblique axial piston pump developed earlier and its structure was mature. Compared with swashplate axial piston pump, it has the following characteristics:

1. 斜轴式轴向柱塞泵中的柱塞是由连杆带动的，所受径向力很小，因此允许传动轴与缸体轴线之间的夹角达到25°，现已达到40°，因而泵的排量较大。而斜盘式轴向柱塞泵的斜盘倾角受径向力的限制，一般不超过过20°。

The plunger in the 1. axial axial piston pump is driven by the connecting rod, and the radial force is very small, so the angle between the shaft and the axis of the cylinder is allowed to reach 25 degrees, and now it has reached 40 degrees, so the displacement of the pump is large. The inclined angle of the swashplate axial piston pump is limited by radial force, and generally does not exceed 20 degrees.

2. 缸体受到的倾覆力矩很小，缸体端面与配油盘贴合均匀，泄露损失小，容积效率高；摩擦损失小，机械效率高。

2. the overturning moment of the cylinder block is very small, the cylinder end face and the oil distribution plate are even, the leakage loss is small, the volume efficiency is high, the friction loss is small, and the mechanical efficiency is high.

3. 结构坚固，抗冲击性能好。

3. sturdy structure, good impact resistance.

4. 由于斜轴泵的传动轴要承受相当大的轴向力和径向力，需采用承载能力大的推力轴承。

4. due to the considerable axial and radial forces on the transmission shaft of the inclined shaft pump, thrust bearing with large load capacity is required.

5. 斜轴泵的总效率略高于斜盘泵。但斜轴泵的体积大，流量的调节靠摆动缸体使缸体轴线与传动轴线的夹角发生变化来实现，运动部件的惯性大，动态响应慢。

The total efficiency of the 5. skew pump is slightly higher than that of the slanted disk pump. But the volume of the pump is large, and the adjustment of the flow is realized by the change of the angle between the axis of the cylinder and the axis of the drive. The inertia of the moving parts is large and the dynamic response is slow.

6. 由于求铰处可以较好地锚固，有利于柱塞的回程，斜轴式轴向柱塞泵允许在自吸工况或较低的进口压力下运转，其自吸性能较斜盘式轴向柱塞泵好。

6. as the hinge can be anchored well, it is beneficial to the return distance of the plunger. The oblique axial piston pump is allowed to operate under the self suction condition or under the lower inlet pressure, and its self suction performance is better than that of the inclined disk axial piston pump.

以A7V为例。

Take A7V as an example.

产品名称：A7V液压柱塞泵

Product Name: A7V hydraulic plunger pump

所属类别：高压柱塞泵

Category: high pressure plunger pump

规 格：A7V28、A7V55、A7V80、A7V107、A7V117、A7V160、A7V250

Specifications: A7V28, A7V55, A7V80, A7V107, A7V117, A7V160, A7V250

产品说明：斜轴式轴向柱塞变量泵，用于开式回路静压传动。流量、转速与排量成正比，在恒定转速下可实现无级变量。

Product Description: inclined axial piston variable displacement pump for open loop hydrostatic transmission. The flow rate and speed are directly proportional to the displacement, and the stepless variable can be realized at constant speed.

特 点：转子与分油盘之间为球面配油，在运动中能自动对中，周速较低，效率较高。

Features: spherical oil distribution between the rotor and the oil distributor, which can automatically meet the requirement in motion, and the speed is low and the efficiency is high.

控制方式：LV恒功率控制、DR恒压控制、EL电气比例控制、HD液压控制、MA手动控制

Control mode: LV constant power control, DR constant voltage control, EL electric proportional control, HD hydraulic control, MA manual control.

注意事项：1．任何场合都应保持液压油的清洁度； 2．定期更换液压油(工作1000～3000小时或六个月)。

Precautions: 1. the cleanliness of hydraulic oil should be maintained on any occasion; 2., hydraulic fluids should be replaced regularly (1000~3000 hours or six months).

控制方式

control mode

恒功率控制LV

Constant power control LV

LV控制是输入转速不变时，根据负载压力来控制流量，使油泵输出的液压功率恒定

The LV control is based on the load pressure to control the flow rate when the input speed is constant, so that the hydraulic power output of the oil pump is constant.

即： P=△PoQ/60=常数据 式中：P功率（kW）、△P压差（MPa）、Q流量（L/min） 工作压力作用在先导活塞上，通过活塞顶杆压向控制起点调节弹簧，使先导油进入流量活塞，油泵的摆角从Vgmax向Vgmin摆动，使供油量减小（参见前面结构剖视图）。 控制起点为5MPa的恒功率控制LV 通过油口G及节流口C可以叠加HP控制。

That is: P= Delta PoQ/60= regular data formula: P power (kW), Delta P pressure difference (MPa), Q flow (L/min) working pressure on the pilot piston, through the piston top bar pressure to control the control starting point to adjust the spring, the pilot oil into the flow piston, the oil pump swing angle from Vgmax to Vgmin, to reduce the supply of oil (see the front structure Dissection view). The constant power control LV, which starts at 5MPa, can be superimposed by HP through the oil port G and the throttle port C.

带机械行程限位的恒功率控制LV

Constant power control LV with mechanical travel limit

借助于机械行程限位器，可以无级改变或限制最大排量。根据需要调节范围可从Vgmax到Vgmin。

With the aid of mechanical stroke limiter, the maximum displacement can be changed or restricted stepless. It can be adjusted from Vgmax to Vgmin as required.

带压力截流的恒功率控制LV 适用于Vgmin=0的所有规格 压力截流是在恒功率控制基础上叠加一个恒压控制，它借助于顺序阀来实现。当压力达到设定压力的最高值时（调节范围到31.5MPa），顺序阀打开，流量便自动减小到Q=0。 顺序阀与泵分开安装 规格20-117

The constant power control LV with pressure interception is applicable to all specifications of Vgmin=0 pressure interception by superimposing a constant voltage control on the basis of constant power control, which is realized with the aid of a sequence valve. When the pressure reaches the maximum value of the set pressure (range of adjustment to 31.5MPa), the sequence valve opens, and the flow rate automatically decreases to Q=0. Sequence valve and pump separate installation specification 20-117

以A4V 10V为例

Take A4V 10V as an example

产品名称：A4VG液压柱塞泵

Product Name: A4VG hydraulic plunger pump

所属类别：高压柱塞泵规 格：A4VG40、56、71、90、125、180、250

Classification: high pressure piston pump specifications: A4VG40, 56, 71, 90, 125, 180, 250

特性：斜盘式轴向柱塞变量泵，用于闭式回路静液压传动、流量与驱动转速及排量成正比并可无级变量，流量随透摆角从零增加到其最大值；使斜盘摆过中位可以平稳改变液流流动方向，易与各种控制和调节系统匹配的多种变量方式。泵在高压油侧配备两个溢流阀来保护静液压传动（泵和马达）免于超载。高压溢流阀同时也具有补油阀的功能，内置辅助泵用作补油泵和控制砂泵，最高补油压力由一个内置补油溢流阀来限制，全系列带有内置压力切断阀。

Characteristics: inclined disk axial piston variable pump, which is used in closed loop hydrostatic transmission, flow and driving speed and displacement, and can be stepless variable, the flow rate increases from zero to its maximum, and the middle position of the inclined disk can change the flow direction smoothly, and it is easy to match the control and adjustment systems of various kinds. Quantity method. The pump is equipped with two relief valves on the high-pressure oil side to protect the hydrostatic transmission (pump and motor) from overload. The high pressure relief valve also has the function of the oil filling valve. The built-in auxiliary pump is used as the oil filling pump and the control sand pump. The highest oil filling pressure is limited by a built-in oil overflow relief valve, and the whole series has the built-in pressure cutting valve.

典型应用： 混凝土泵车、重型液压平板车、液压泵站

Typical applications: concrete pump truck, heavy hydraulic flat car, hydraulic pumping station

注意事项：1．任何场合都应保持液压油的清洁度； 2．定期更换液压油(工作1000～3000小时或六个月)。

Precautions: 1. the cleanliness of hydraulic oil should be maintained on any occasion; 2., hydraulic fluids should be replaced regularly (1000~3000 hours or six months).

产品名称：A10VG液压柱塞泵

Product Name: A10VG hydraulic plunger pump

通过调节斜盘倾角可以无级改变泵的排量。

The displacement of the pump can be changed stepless by adjusting the inclination angle of the swashplate.

其特点为：——自吸性能良好,噪音较低,允许在25MPa工作压力下连续工作,驱动轴能承受轴向和径向载荷,功率/重量比s高,多种控制方式且控制时间短,可组成复合泵.

Its characteristics are: good self absorption, low noise, continuous working under the working pressure of 25MPa, the driving shaft can bear axial and radial load, the power / weight is higher than s, and the control time is short, and the compound pump can be formed.

说明：轴向柱塞式斜盘结构变量泵A10V0是用于开式系统的静压传动中。

Description: axial piston swash plate variable displacement pump A10V0 is used in hydrostatic transmission of open system.

流量与驱动转速及斜盘倾角成正比，通过调节斜盘倾角可以无级改变泵的排量。

The flow rate is directly proportional to the driving speed and the inclination angle of the swashplate. The displacement of the pump can be stepless changed by adjusting the inclination angle of the swashplate.