Hydraulic power source, hydraulic system and working machine

By arranging the pump unit and booster unit coaxially in the hydraulic power source, and combining them with a turbine, inducer, and cooling system, the problem of insufficient oil suction in electric-driven hydraulic power sources at high speeds is solved, achieving higher oil suction efficiency and output pressure stability, and improving transmission efficiency and integration.

CN224229015UActive Publication Date: 2026-05-12ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202521017088.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-21
Publication Date
2026-05-12
Estimated Expiration
2035-05-21

AI Technical Summary

Technical Problem

Existing electric hydraulic power sources are prone to insufficient oil intake at high speeds, leading to problems such as cavitation inside the hydraulic pump, low volumetric efficiency, and unstable output pressure.

Method used

Design a hydraulic power source in which the pump unit and the booster unit are coaxially arranged on the output shaft of the motor unit. The booster unit improves the oil suction efficiency through a turbine and inducer structure, and a cooling oil passage and a cooling fan are set in the motor unit for internal cooling, so as to achieve autonomous boosting and cooling.

Benefits of technology

It improves the oil suction efficiency and output pressure stability of the hydraulic power source, reduces noise, enhances transmission efficiency and integration, and reduces maintenance costs.

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Abstract

The utility model belongs to the technical field of hydraulic transmission, and discloses a hydraulic power source, a hydraulic system and operating machinery, the hydraulic power source comprises a motor unit, a pump unit and a pressurizing unit, the pump unit and the pressurizing unit are coaxially arranged on an output shaft of the motor unit and are respectively in transmission connection with the output shaft, and the pump unit is provided with an oil suction port and an oil outlet. The pressurizing unit is provided with a pressurizing working cavity and a pressurizing inlet of the pressurizing working cavity, and the pressurizing working cavity is communicated with the oil suction port. According to the hydraulic power source, the pump unit and the pressurization unit are coaxially connected to the output shaft of the motor unit, and operation of the pump unit and pressurization at the oil suction opening can be achieved only through self power.
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