Vehicle Water Pump Control Valve Linear Reciprocating Design
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Solution Overview
Problem
Existing vehicle water pumps face issues with assembly complexity, precision requirements, and reduced sealing due to loose connections between the valve core and valve body, leading to premature failure.
Innovation Solution
A control valve design featuring a vertically reciprocating valve core and rack-gear engagement, with multiple inlet and outlet windows and reinforcing ribs, simplifying assembly and enhancing sealing by reducing friction and wear points, and allowing precise coolant flow adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the valve core rotates in the valve body housing to control coolant flow, then the valve can be compact, but after long use the side edges cannot tightly match the valve body housing, reducing sealing performance
Solution Approach 1:
The invention inverts the traditional rotary valve core design by using a reciprocating linear motion valve core. Instead of rotating to control flow, the valve core moves up and down linearly within the valve body, with the swing arm reciprocating along the valve body's central axis. This inversion eliminates the rotational sealing interface that degrades over time, replacing it with a linear sliding seal that maintains better contact and sealing performance throughout the service life.
2Reliability
If the valve swing arm is connected to the valve core through the shaft body using interference fitting, then the connection is secure, but assembly requires special tools and high precision, and looseness may occur after long use
Solution Approach 1:
The invention replaces the interference fitting mechanical connection between the swing arm and shaft body with a rack-and-pinion gear engagement system. The swing arm includes a rack portion that engages with gear teeth on the gear shaft, creating a positive mechanical drive. This substitution eliminates the need for interference fitting and special assembly tools, allowing simple snap-fit or threaded assembly while maintaining reliable power transmission without looseness over time.
3Adaptability or versatility
If the valve core rotates to control flow, then the valve structure is conventional, but the friction area and wear points between the valve core and valve body are large, reducing service life
Solution Approach 1:
The invention inverts the motion type from rotational to linear reciprocating motion. The valve core moves vertically along the central axis of the valve body rather than rotating, which dramatically reduces the friction area and wear points. The linear sliding seal between the valve core and valve body housing has minimal contact area compared to the circumferential contact required for rotary motion, thereby extending service life while maintaining effective flow control capability.
4Ease of manufacture
If pressing the valve swing arm into the shaft body is insufficient, then assembly is easier, but the shaft body cannot be driven by driving the valve swing arm
Solution Approach 1:
The invention replaces the press-fit connection that requires sufficient pressing force with a rack-and-pinion gear engagement system. The rack portion on the swing arm engages with gear teeth on the gear shaft, creating a positive mechanical drive that transmits power reliably without requiring interference fitting. This allows easy assembly without special tools while ensuring the shaft body can be reliably driven by the valve swing arm throughout the component's service life.
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
Simplifies assembly, improves sealing performance, extends service life, and enhances cooling efficiency by reducing stress concentration and facilitating precise coolant flow control.
Implementation Method 1
a gear shaft engaged with the rack portion is disposed on the swing arm, the rack portion is disposed along the vertical direction, and the gear shaft is disposed along a horizontal direction
Data Source
AI summary
The present invention relates to the technical field of vehicle water pumps, and in particular, to a control valve applicable to a vehicle water pump. The control valve includes a valve body and a valve core movably disposed in the valve body. A valve allowing a coolant to pass through the valve body is disposed on an outer circumferential surface of the valve body, a swing arm driving the valve core to perform reciprocating movement along a vertical direction to control opening and closing of the valve is disposed at an upper end of the valve body, and a transmission structure transmitting torque is disposed between the swing arm and the valve core. Beneficial effects of the present invention are as follows: assembly difficulty is reduced, assembly efficiency is improved, and a service life is prolonged.