Gear pump with axial clearance compensation structure
By adopting an axial gap compensation structure and sealing block design in the gear pump, the leakage and cost problems caused by radial gap compensation in the prior art are solved, and more efficient sealing and volume efficiency are achieved.
CN222141511UActive Publication Date: 2024-12-10NANJING WEIFU JINNING
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Patent Information
- Application Number
- CN202420925967.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-30
AI Technical Summary
Technical Problem
The existing internal meshing gear pumps mostly use radial clearance compensation in their design, resulting in large quantities of parts, complex manufacturing, high production costs, and large leakage, affecting volume efficiency.
Method used
The gear pump design adopts an axial gap compensation structure to achieve sealing in the crescent-shaped area between the gear shaft and the ring gear through a sealing block, and use an axial gap compensation plate to enhance the sealing performance and reduce the amount of axial leakage.
Benefits of technology
It effectively isolates the pressure suction chamber and high-pressure chamber of the oil pump, improves the volumetric efficiency and sealing performance of the pump, reduces axial leakage, and reduces production costs.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN222141511U_ABST
Abstract
The utility model relates to a gear pump with an axial clearance compensation structure. The pump comprises a gear ring which is rotatably matched in an inner cavity of a pump body; outer teeth of the gear shaft are meshed with inner teeth of the gear ring through involute teeth, so that an oil pump pressure suction cavity and an oil pump high-pressure cavity are formed in the two sides of a meshing area; the sealing block is integrally formed on the pump body, and the sealing block is arranged in a crescent area formed between the gear shaft and the inner teeth and the outer teeth of the gear ring in a sealing mode so that the oil pump pressure suction cavity and the oil pump high-pressure cavity can be isolated from each other; one end of the axial clearance compensation plate abuts against the inner end face of the pump cover, the other end of the axial clearance compensation plate abuts against the end face of the gear shaft, the end face of the gear ring and the end face of the sealing block, and the axial clearance compensation plate comprises a high-pressure runner communicating with an oil pump high-pressure cavity and a circulation notch communicating with an oil pump pressure suction cavity; the pump cover comprises a pump cover high-pressure cavity communicating with the high-pressure flow channel and an oil inlet groove communicating with the circulation notch. The axial leakage rate is reduced, and the volume efficiency is improved.
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