PD060PS02SRS5AC00S100 Hydraulic Pump P1018 P1028 P1045 P1060 P1075 P1100 P1140 PD018 PD028 PD045 PD060 PD075 PD100 PD140 PD P1

– Displacement and pressure parameters: Rated displacement 60 cc/rev (“060” in the model corresponds to the core displacement specification), variable range 0-60 cc/rev; The rated working pressure is 280 bar, the maximum allowable pressure is 320 bar (short-term continuous ≤10 seconds), the back pressure of the return oil is ≤5 bar, the pressure compensation control pressure difference is ≤12 bar, and the set pressure of the relief valve is 280 bar±5%

– Rotational speed and flow parameters: Rated rotational speed 1800 rpm, maximum rotational speed 2500 rpm (short-term ≤5 minutes), minimum stable rotational speed 500 rpm; The maximum output flow at the rated speed is 108 L/min (60 cc/rev×1800 rpm÷1000), the flow regulation response time is ≤150 ms, and the flow pulsation rate is ≤2.5%

– Efficiency parameters: Rated working condition volumetric efficiency ≥95%, total efficiency ≥88%; The power consumption of the variable control mechanism is ≤280 W, and the system pressure loss at the rated flow is ≤4.5 bar

2. Structure and connection parameters

– Structural type: Cast iron one-piece formed pump body, surface phosphating anti-rust treatment; 9 plungers are evenly distributed in the cylinder body. Alloy steel plungers (hardness HRC62-65), nitrided treatment swash plates (surface hardness HV850-950), and static pressure balanced distribution plates. It is supported by conical roller bearings, with a combination of double-end mechanical seals and fluororubber lip seals, and the static leakage is ≤0.8 mL/min

– Installation and connection specifications: Flange installation (compatible with ISO 3019-1 and SAE standards, “SRS5AC00” corresponds to installation positioning); Oil port threads: Suction port G1½, outlet port G1, control port G1/4; The output shaft is connected by a flat key (specification 12×30, SAE 19 standard); The overall weight is approximately 28 kg, and the external dimensions (length × width × height) are approximately 340×210×190 mm. It adopts a compact packaging design

– Protection grade: IP65, suitable for dusty, humid, and medium to low vibration industrial and construction machinery environments, supports horizontal or vertical axial installation

3. Medium and Environmental requirements

– Medium requirements: Compatible with L-HM 46/68 anti-wear hydraulic oil. The allowable medium viscosity range is 7-400 mm²/s, the optimal working viscosity is 14-50 mm²/s, the moisture content is ≤0.02%, and the solid particle size is ≤10 μm

– Environmental parameters: Operating environment temperature -40℃ to 90℃, relative humidity ≤95%; The cleanliness of the oil should reach ISO 4406 14/11 grade. In Marine scenarios, it should comply with the medium filtration requirements in GB/T 38045-2019

– Filtration requirements: A coarse filter screen of ≥80 mesh must be installed on the oil suction side. A high-pressure filter with an accuracy of ≤10 μm should be added to the oil outlet. The filtration accuracy on the oil return side should be ≤25 μm

Ii. Working Principle

This pump is a swash plate type axial piston variable pump. Its core achieves the conversion of mechanical energy and hydraulic energy and the adaptive control of flow rate through “the change of the reciprocating volume of the piston + the adjustment of the swash plate Angle”, and is combined with a dual pressure protection mechanism to ensure safe operation. The specific process is as follows:

1. Core mechanism of power transformation

The motor drives the transmission shaft to rotate the cylinder block synchronously. Under the combined action of the thrust from the inclined surface of the swash plate and the return spring, the plunger moves back and forth in a straight line within the plunger holes of the cylinder block. When the plunger rotates with the cylinder body to the oil suction zone, the plunger extends outward, the volume of the plunger hole increases to form a vacuum, and the hydraulic oil is sucked in through the oil suction port and the oil suction chamber of the distribution plate. When the plunger rotates to the oil pressure zone, the swash plate compresses the plunger to retract inward, reducing the volume of the plunger hole. The oil is compressed to generate high pressure and guided through the oil pressure chamber of the distribution plate to the oil outlet for discharge, providing power for the actuator.

2. Variable regulation and protection mechanism

The integrated pressure compensation variable mechanism and the high-pressure relief valve form a dual control: the variable mechanism controls the oil to push the variable piston to change the inclination Angle of the swash plate, thereby adjusting the plunger stroke to achieve stepless displacement regulation from 0 to 60 cc/rev. When the system pressure rises to the set value, it automatically reduces the displacement to maintain pressure stability, realizing “load energy supply as needed”. When the system pressure exceeds the maximum allowable value of 320 bar, the relief valve is fully open to unload, guiding the oil back to the suction chamber to prevent the pump body and pipelines from being overloaded and damaged. The static pressure balanced distribution plate can automatically compensate for the wear clearance to ensure the long-term stability of volumetric efficiency.

Iii. Product Features and Advantages

– High efficiency, energy saving and precise control: The pressure compensation variable mechanism enables the flow to match the load as needed, saving 30%-35% energy compared with the fixed displacement pump, and the idle flow rate is ≤ 2.5L /min. With a rapid response time of 150 ms, it can precisely adapt to scenarios with sudden load changes, and the flow control accuracy is ±1.5%

– High reliability and long service life: The 9-plunger uniform distribution design reduces flow pulsation (≤2.5%), and the operating noise at 1 meter is ≤78 dB. The alloy steel plunger and nitrided swash plate form a highly wear-resistant friction pair, with a wear rate of ≤ 0.02mm per 10,000 hours. The conical roller bearing enhances the impact resistance, and the rated working condition fault-free operation life is ≥ 18,000 hours

– Compact structure and strong adaptability: It adopts an integrated cast iron pump body design, reducing the volume by 30% and the weight by 25% compared to the same power plunger pump, making it suitable for equipment with limited installation space. With a wide temperature range of -40℃ to 90℃, it is suitable for high and low temperature operations. It has an IP65 protection rating and can withstand dusty and humid environments. It supports two installation methods: flange and foot seat

– Easy maintenance and low leakage: It adopts a gaske-free elastomer sealing design to eliminate the risk of external leakage. The key components are modularly laid out. During maintenance, only the filters and seals need to be replaced, reducing the maintenance cost by 20% compared to the traditional structure. Equipped with a shell oil drain port, it is suitable for vertical installation scenarios

Iv. Usage Functions and Purposes

1. Core usage functions

– Variable flow on-demand fuel supply: 0-108 L/min stepless flow regulation, providing precise power for actuating elements under different working conditions, such as rapid mold closing and slow pressure holding in injection molding machines, and compound action coordination in excavators, etc

Constant pressure stable control: The dual guarantee of pressure compensation valve and relief valve keeps the system pressure stable within the set range, with pressure fluctuation ≤2 bar. It protects downstream hydraulic components and is suitable for constant pressure demand scenarios such as press pressurization and precision press-fitting

– Multi-scenario adaptation and expansion: Supports minimum/maximum displacement limit adjustment, and customizable electronic control proportional control module for remote automatic control; The shell oil drainage design supports vertical axial upward installation, adapting to the layout requirements of special equipment

2. Main uses

As a core power component of medium and high-pressure variable hydraulic systems, it connects the motor with the actuator (cylinder, hydraulic motor), achieving efficient conversion of mechanical energy into hydraulic energy. It provides power for equipment with frequent load changes and high requirements for flow/pressure control accuracy, and is a key core component of industrial heavy machinery, construction machinery and special equipment.

V. Applicable Machines and Scenarios

1. Adapt to the core machine

– Industrial machinery: 500-1000 ton medium-sized presses, 200-300 ton injection molding machines, hydraulic tool turret systems for CNC machining centers, plate rolling machines, bending machines, and injection systems for medium-sized die-casting machines

– Construction machinery: Main working system of 8-15 ton excavators, lifting and steering system of 5-10 ton forklifts, lifting mechanism of small loaders, vibration system of road rollers, luffing mechanism of crawler cranes

– Special equipment: Marine deck cranes, steering gear hydraulic systems, metallurgical equipment roll adjustment mechanisms, high-pressure water cutting equipment for coal mines, power sources for medium-sized hydraulic test benches

2. Typical application scenarios

– Medium-sized press pressurization scenario: Equipped with a 630-ton press, during the rapid downward stage, it outputs a large displacement of 60 cc/rev with a flow rate of 108 L/min (1800 rpm), achieving rapid positioning within 1.2 seconds. During the pressurization stage, it automatically reduces to a small displacement of 15 cc/rev, maintaining a constant pressure of 280 bar, with a pressure holding accuracy of ±1%. The energy consumption per shift is 32% lower than that of a fixed displacement pump

– Excavator compound action scenario: As the main pump of a 12-ton excavator, it drives the three actuating elements of the boom, boom and bucket to act in coordination. Load sensitive control ensures that the flow distribution response time during compound actions is ≤200 ms. During heavy-load excavation, the pressure is automatically increased to 280 bar, and during light-load transfer, it is reduced to 120 bar and the displacement is decreased, resulting in a 28% reduction in overall fuel consumption

– Marine crane lifting scenario: Compatible with 10-ton Marine deck cranes, IP65 protection resistant to Marine damp salt spray environments; During lifting, the displacement increases from 10 cc/rev to 60 cc/rev with the load. The 280 bar pressure drives the lifting motor to achieve a stable lifting at 1.0 m/min. When idle in standby mode, the flow rate is ≤2 L/min, which saves energy and reduces consumption

Six. Similar models

1. Different models of the same series displacement

-PD045PS02SRS5AC00S100: Rated displacement 45 cc/rev, flow rate 81 L/min at rated speed 1800 rpm, rated pressure 280 bar, suitable for medium and small-sized equipment such as 300-500 ton presses and 8-ton excavators. Weight approximately 22 kg, volume reduced by 20%

-PD075PS02SRS5AC00S100: Rated displacement: 75 cc/rev, rated speed: 1800 rpm, flow rate: 135 L/min, maximum pressure: 320 bar. It is suitable for large equipment such as 1000-1500 ton presses and 15-ton excavators. The power is 25% higher than the original model, and the weight is approximately 35 kg

-PD028PS02SRS5AC00S100: Rated displacement 28 cc/rev, rated speed 1800 rpm, flow rate 50.4 L/min, rated pressure 280 bar, suitable for small precision equipment such as CNC lathes and mini excavators, weighing only 15 kg

2. Models with the same displacement but different functions

-PD060PD02SRS5AC00S100: Electrically controlled proportional variable type, supports 4-20mA or 0-10V electrical signal control, flow regulation accuracy ±0.5%, suitable for automated production lines and intelligent equipment, can achieve remote monitoring and closed-loop control, cost 40% higher than the original model

-PD060PA02SRS5AC00S100: Manual variable type. The inclination Angle of the swash plate is mechanically adjusted through the handwheel. The structure is simple and reliable. It is suitable for fixed working conditions where the flow rate changes very little after setting (such as small test benches), and the cost is reduced by 18%

-PD060PS02SRS5LC00S100: Left-rotating installation model, suitable for equipment with limited motor rotation direction. The oil outlet direction is opposite to the original model, and the flange installation dimensions are the same. It can be directly replaced for use

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PD140PB04SRS5AC00S0000000
PD140PB04SRS5AC00S000PB00
PD140PB04SRS5AC00S1000000
PD140PB04SRS5AL00E0000000
PD140PB04SRS5AL00S1000000
PD140PB04SRS5AL00S1100000
PD140PB04SRS5AL0TS1000000
PD140PM04SRS5AC00S0000000
PD140PM04SRS5AL00S0000000
PD140PS01SRS5AAM0S0000000
PD140PS01SRS5AAM0T00A0000
PD140PS01SRS5AC00T00B0000
PD140PS01SRS5AC10S0000000
PD140PS01SRS5AL00T00B0000
PD140PS02SLS5AAM0S0000000
PD140PS02SLS5AAM0S1000000
PD140PS02SLS5AC00E1000000
PD140PS02SLS5AC00E100PB00
PD140PS02SLS5AC00E1100000
PD140PS02SLS5AC00S0100000
PD140PS02SLS5AC00S1000000
PD140PS02SLS5AC00S110PB00
PD140PS02SLS5AC10E1000000
PD140PS02SLS5AC10S100PB00
PD140PS02SLS5AL00E1000000
PD140PS02SLS5AL00S0000000
PD140PS02SRS5AAM0E1000000
PD140PS02SRS5AAM0S0000000
PD140PS02SRS5AAM0S1000000
PD140PS02SRS5AAM0T00C0000
PD140PS02SRS5AAN0S0100000
PD140PS02SRS5AAN0S100PB00
PD140PS02SRS5AC00E1000000
PD140PS02SRS5AC00S1000000
PD140PS02SRS5AC00S100PB00
PD140PS02SRS5AC10S0000000
PD140PS02SRS5AC10S100PB00
PD140PS02SRS5AC10S1100000
PD140PS02SRS5AL00S1000000
PD140PS02SRS5AL00S100PB00
PD140PS02SRS5AL00S110PB00
PD140PS02SRS5AL00T00A0000
PD140PS02SRS5AL00T00B0000
PD140PS02SRU5AL00T00A0000
PD140PS04SRS5AAN0S3000000

Vii. Precautions for Use

Installation and commissioning

When installing, it is essential to ensure that the coaxiality error between the pump shaft and the motor shaft is no more than 0.05mm. Elastic couplings should be used for connection. Rigid connection or direct radial force (≥ 120N) acting on the pump shaft is strictly prohibited to prevent abnormal wear caused by uneven force on the swash plate

The oil suction pipeline should follow the principle of “short, straight and thick” : length ≤1.5 meters, inner diameter ≥30 mm, and the distance from the oil suction port to the bottom of the oil tank ≥150 mm. The pipeline connection is fastened with double bolts, and the sealing gasket is made of high-pressure resistant fluororubber to ensure no air leakage. A vacuum gauge (≤0.015 MPa) needs to be installed on the oil suction side to monitor the vacuum degree.

Before the first start-up, the pump chamber should be filled with clean hydraulic oil (about 400 mL), and the plunger should be manually turned 5-6 times to ensure smooth extension and retraction of the plunger. When starting up, first open the oil suction valve and run it no-load at low pressure (50 bar) and low speed (1000 rpm) for 30 minutes. Gradually increase the pressure and speed to the rated parameters. The interval between each pressure increase should be no less than 5 minutes. At the same time, calibrate the set value of the pressure compensation valve

When installed vertically, it is necessary to ensure that the oil outlet of the shell is unobstructed to prevent the accumulation of lubricating oil. A heat dissipation space of ≥ 250mm should be reserved around the pump body. When the ambient temperature exceeds 45℃, a forced cooling device should be installed to prevent the oil temperature from being too high and accelerating the aging of the sealing parts

2. Operation and Maintenance

During operation, key parameters need to be monitored in real time: pump body temperature (normal ≤85℃, maximum ≤95℃), outlet pressure (fluctuation ≤2 bar), and operating noise (≤78 dB). If the temperature rises sharply by more than 10℃, the pressure fluctuates abnormally or the noise changes suddenly, the machine should be stopped immediately for inspection. The focus should be on checking the cleanliness of the oil (once a month), the jamming of the variable mechanism or the leakage of the seal

– Regular maintenance cycle: Replace the hydraulic oil and the three-stage filters (suction oil, high pressure, and return oil) every 2,000 hours. Disassemble and inspect every 10,000 hours. Replace the plunger when the diameter wear is ≥ 0.03mm and the scratch depth on the swash plate surface is ≥ 0.02mm. At the same time, replace the seal and the return spring. Calibrate the pressure setting values of the pressure compensation valve and the relief valve every 1500 hours

It is strictly prohibited to run the engine without oil (idling for more than 3 seconds may cause the plunger and cylinder block to be scratched). Continuous operation at the maximum pressure (320 bar) is prohibited (for no more than 5 seconds at a time). Before the system is shut down, it needs to be reduced to low pressure (50 bar) and run unloaded for 5 minutes. After the oil temperature is ≤60℃, the oil source should be cut off

3. Storage and Protection

When stored for a long time, all oil ports should be sealed with special plugs. Special anti-rust oil (about 500 mL) should be injected into the pump cavity, and lithium-based grease should be applied to the keyway of the output shaft. Store in a dry and well-ventilated warehouse with a temperature ranging from 0 to 45℃ and a humidity of no more than 60%. Avoid direct sunlight, heavy object compression and oil contamination. Manually turn the wheel once every month to maintain the flexibility of the moving parts

Before being put into use after being idle for more than 12 months, the pump cavity and pipelines must be thoroughly cleaned, all seals and hydraulic oil replaced, and the mating surface between the distribution plate and the cylinder body reground. Conduct a low-speed (1000 rpm) no-load test run for 20 minutes to detect the variable response speed and leakage volume (≤0.8 mL/min is normal). Only after confirming that there are no abnormalities can the system be connected