Valve Spring Seat Sleeve Structure for Stress-Reduced Pump Assembly
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Solution Overview
Problem
The existing valve spring seat designs for plunger pumps in fracturing technology face challenges with inconvenient installation and disassembly, stress concentration, and poor spring fixation, leading to reduced service life and performance due to the need for grooves in the chamber and potential rotation.
Innovation Solution
A valve spring seat sleeve with a cylindrical hollow structure, including a plunger passage, first and second notches, and a spring mounting portion with a U-shaped groove, which allows for easy installation and disassembly without grooves, reducing stress concentration and providing a stable spring fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a groove is arranged in the chamber to fix the valve spring seat sleeve, then the installation and disassembly process becomes convenient, but stress concentration increases and the service life of the valve box decreases
Solution Approach 1:
The invention extracts the fixing function from the valve box chamber by designing self-fixing notches directly on the valve spring seat sleeve. The first and second notches engage with corresponding features on the valve seat, eliminating the need for grooves in the chamber while maintaining convenient installation and disassembly.
Solution Approach 2:
The valve spring seat sleeve is segmented into functional zones: the first and second notches for fixing, the plunger passage for fluid flow, and the spring mounting portion for spring installation. This segmentation allows each feature to perform its specific function independently without requiring a groove in the chamber.
2Ease of operation
If a groove is arranged in the chamber to fix the valve spring seat sleeve, then the installation process is simplified, but the service life of the valve box is reduced
Solution Approach 1:
The fixing mechanism is extracted from the valve box and integrated into the valve spring seat sleeve itself through the first and second notches. This eliminates the need for grooves in the chamber, simplifying installation while preserving the service life of the valve box by avoiding stress concentration.
3Stability of the object's composition
If the valve spring seat sleeve is fixed in the chamber, then the spring fixation becomes stable, but rotation in the chamber occurs
Solution Approach 1:
The first and second notches are positioned asymmetrically on the valve spring seat sleeve, creating a unique orientation that prevents rotation. The notches engage with corresponding features on the valve seat in a specific angular position, ensuring stable spring fixation while preventing any rotational movement in the chamber.
Data Source
AI summary
A valve spring seat sleeve, a valve assembly, and a plunger pump are disclosed. The valve spring seat sleeve includes a cylindrical hollow structure, a first fluid hole, a first notch and a second notch; the cylindrical hollow structure includes a plunger passage; the first fluid hole passes through a sidewall of the cylindrical hollow structure and communicated with the plunger passage; the first notch and the second notch are located on a side of the cylindrical hollow structure opposite to the first fluid hole; the cylindrical hollow structure includes a first end portion, a second end portion and an intermediate portion, a center of the first fluid hole is located at the intermediate portion, the cylindrical hollow structure further includes a spring mounting portion located between the first notch and the second notch.