Thermostatic Valve Guide Structure for Thermal Actuator Stability
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Solution Overview
Problem
Existing thermostatic valves in vehicles face instability and shaking issues due to fluid impact, particularly when operating under conditions of excessive hydraulic torque converter slipping or extreme temperatures, affecting the lubrication performance and service life of vehicles.
Innovation Solution
A thermostatic valve design featuring a valve body with a cavity, end cover assembly, and thermal actuator, incorporating a guide fitting part with protrusions and annular structures for stable operation, which provides a sliding fit with the thermal actuator and end cover assembly, ensuring the thermal actuator remains stable and reliable even under fluid impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the thermal actuator is designed without a guide fitting part, then the structure is simpler, but the thermal actuator shakes severely under fluid impact
Solution Approach 1:
The guide fitting part acts as an intermediary component between the thermal actuator and the first cavity. It provides a sliding fit interface that guides the thermal actuator's movement while reducing direct fluid impact on the actuator body, thereby stabilizing the thermal actuator without significantly complicating the overall structure
Solution Approach 2:
The guide fitting part changes the physical parameters of the interface between the thermal actuator and the cavity. By providing a precisely fitted sliding surface with specific dimensional parameters, it constrains the thermal actuator's movement and reduces shaking while maintaining operational freedom
2Reliability
If the guide fitting part is added to stabilize the thermal actuator, then the thermal actuator shaking is reduced, but the device complexity increases
Solution Approach 1:
The guide fitting part is designed to be integrated with either the valve body or the thermal actuator itself, merging the guiding function into an existing component rather than adding a completely separate assembly. This reduces the number of discrete parts and simplifies the overall structure while still providing the necessary stabilization
Solution Approach 2:
The guide fitting part serves multiple functions simultaneously: it provides mechanical guidance for the thermal actuator, seals the interface between the actuator and cavity, and distributes fluid pressure evenly. This multi-functionality reduces the need for additional specialized components, thereby limiting the increase in device complexity
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 design enhances the stability and reliability of the thermal actuator, preventing severe shaking and maintaining effective temperature control of gearbox oil, thereby improving the lubrication performance and service life of vehicles.
Implementation Method 1
When the temperature of the gearbox oil line increases, the heat-sensitive material of a thermal actuator expands due to heat
Implementation Method 2
when the oil temperature is too low, the heat-sensitive material of the thermal actuator begins to solidify and contract
Implementation Method 3
The oil in the gearbox oil line exchanges heat with exothermic gearbox components in the flow process, so that the oil temperature is controlled within an appropriate range
Data Source
AI summary
A thermostatic valve includes a valve body with a cavity provided therein, an end cover assembly, and a thermal actuator and at least one spring that are mounted in the cavity. The valve body is provided with at least three ports including a first port, a second port and a third port. The thermal actuator includes a valve rod and a main body. The spring includes a first spring. The cavity includes a first cavity and a second cavity, and the second cavity is away from the end cover assembly. The first port is in communication with the first cavity, and the third port is in communication with the second cavity. The first spring is partially or completely located in the second cavity. The thermostatic valve further includes a guide fitting part. The thermostatic valve has a simple structure, and the operation thereof is more stable and reliable.