Oil Makeup Pump Detailed Content
I. Function and Role
1. Provide Cooling Oil: The oil makeup pump supplies cooling oil to help reduce the temperature of the hydraulic system and ensure stable operation.
2. Maintain System Pressure: It maintains the pressure in the main system circuit, ensuring stable pressure levels under various operating conditions.
3. Provide Control Pressure: The oil makeup pump also provides controllable pressure for the control circuit. The control pressure of the system is generally designed to be the same as or lower than the oil makeup pump pressure.
4. Replenish Internal Leakage Oil: To avoid damaging the transmission in any driving or braking state, the oil makeup pump replenishes oil lost due to internal leakage. The makeup oil pressure must be set to a specified pressure.
II. Structure and Principle
1. Pump Body Design: The oil makeup pump is generally a gear pump, which may be an external gear pump or a cycloidal gear pump. These pump body designs enable the oil makeup pump to effectively suck in and discharge oil.
2. Drive Mode: The oil makeup pump is installed on the main oil pump and driven by the main shaft of the main oil pump. This design allows the oil makeup pump to work automatically with the operation of the main oil pump, without requiring an additional power source.
3. Pressure Control: The oil makeup pump generally has a separate makeup oil relief valve to limit the output pressure. When the system pressure reaches the set value, the relief valve opens and releases excess oil, thereby protecting the system from damage due to excessive pressure.
III. Application and Maintenance
1. Application Fields: Oil makeup pumps are widely used in various machinery and equipment, especially those involving high-speed rotation or friction, such as engines, air compressors, hydraulic presses, pumps, and various machine tools and manufacturing equipment.
2. Installation and Commissioning: When installing the oil makeup pump, attention should be paid to details such as the chamfer direction of the large and small gear rotors, the direction of the side plate of the oil makeup pump, and the flatness of the contact surface. Additionally, the oil makeup pump needs to be debugged and tested to ensure that its output pressure meets system requirements.
3. Troubleshooting: During use, the oil makeup pump may experience issues such as unstable pressure, low control pressure, and insufficient reversing times. These problems may be caused by issues with the oil makeup pump itself or other parts of the system. When troubleshooting, it is necessary to carefully inspect each component of the oil makeup pump and the overall condition of the system to identify the problem and repair it.
IV. Selection and Precautions
1. Selection Principles: When selecting an oil makeup pump, it is necessary to determine the appropriate model and specification based on the specific needs and operating environment of the system. At the same time, the performance indicators of the oil makeup pump, such as displacement, pressure, and efficiency, should also be considered.
2. Precautions: When using the oil makeup pump, attention should be paid to maintaining the cleanliness and adequacy of the oil, avoiding oil contamination and leakage issues. Additionally, regular inspections and maintenance of the oil makeup pump are required to ensure its long-term stable operation.
In summary, the oil makeup pump is an indispensable component in machinery and equipment. Understanding its working principle, functional characteristics, application, and maintenance knowledge is important for ensuring the normal operation of machinery and equipment and improving its service life.
