Boring Machine Ram Bearing Cooling via Direct Fluid Contact
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Solution Overview
Problem
Existing boring machines face accuracy issues due to thermal movements caused by heat generation during high-speed operation, which can lead to overheating and excessive thermal expansion of components, particularly affecting the bearings and resulting in increased friction and potential blockages.
Innovation Solution
A cooling fluid circuit is integrated into the ram of the boring machine, where the cooling fluid comes into direct contact with the radially inner portions of the bearings, utilizing a helical channel for efficient cooling and minimizing thermal expansion risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the bar and jacket rotate at high speed during operation, then productivity increases, but heat is generated causing thermal expansion and affecting bearing performance
Solution Approach 1:
A cooling circuit is introduced as an intermediary system between the heat source (bearings) and the environment. The circuit includes cooling channels formed in the radially inner portions of the bearings, allowing cooling fluid to flow through and remove heat directly at the source, preventing thermal expansion and performance degradation
Solution Approach 2:
The patent employs a hydraulic cooling system where cooling fluid is pumped through channels formed in the bearings. The fluid absorbs heat from the radially inner portions of the bearings during rotation, effectively managing thermal load while maintaining high operating speeds
2Temperature
If cooling channels are formed in the radially inner portions of the bearings, then cooling efficiency improves, but device complexity increases
Solution Approach 1:
The cooling function is merged with the bearing structure itself. The radially inner portions of the bearings are formed with integrated cooling channels, combining the structural and cooling functions into a single component. This eliminates the need for separate cooling devices and reduces overall system complexity
Solution Approach 2:
Cooling channels are selectively formed only in the radially inner portions of the bearings where heat generation is most critical. This localized approach provides targeted cooling where needed most, without unnecessarily complicating the entire bearing structure or requiring cooling throughout the entire component
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively cools the radially inner portions of the bearings, reducing the risk of overheating, friction, and blockages, thereby maintaining precision and preventing component malfunction.
Implementation Method 1
the cooling fluid comes into direct contact with the radially inner portions of the bearings... effectively cools the radially inner portions of the bearings, reducing the risk of overheating
Data Source
AI summary
The ram comprises a ram body (14), a jacket (16) mounted in a rotary manner in the ram body (14) by means of a plurality of bearings (17, 18) each comprising, a radially inner portion (17a, 18a) coupled to the jacket (16) in such a way that it turns with the jacket (16), and a fixed radially outer portion (17b, 18b), and a bar (15) mounted in the jacket (16) in such a way that it rotates with the jacket (16). Furthermore, the ram comprises a circuit for a cooling fluid. This circuit has at least one section configured so the cooling fluid enters into direct contact with the radially inner portion (17a, 18a) of at least one of the bearings (17, 18). In this way, this radially inner portion can be cooled efficiently.