Reciprocating Sampling Pump Counterbalancing Vibration

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Solution Overview

Problem

Existing sampling pumps in respiration monitoring equipment cause vibration and flow fluctuations, affecting the accuracy of gas sensors used in medical respiration monitoring by introducing measurement noise.

Innovation Solution

A sampling pump design featuring two reciprocating pumps with opposing impact directions, controlled by a system that outputs coordinated drive signals to counterbalance vibrations and ensure stable fluid delivery, reducing noise and improving measurement accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single reciprocating pump is used for gas sampling, then the pump structure is simple, but vibration and flow fluctuations occur affecting measurement accuracy

Engineering Contradiction:

Improvepump structureVSAvoidgas sensor measurement accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent combines two reciprocating pumps into a single pump set where they work simultaneously with opposing impact directions. This merging approach maintains structural simplicity while eliminating vibration and flow fluctuations through counterbalancing, thereby preserving measurement accuracy without significantly increasing device complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent applies the counterweight principle by designing two reciprocating pumps to generate opposing impact forces that cancel each other out. The first pump's impact direction is opposite to the second pump's impact direction, creating a counterbalancing effect that eliminates vibration and stabilizes flow, thus protecting measurement precision.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

2Volume of moving object

If a diaphragm sampling pump with single rotary motor is used, then the pump is compact, but large flow fluctuations and vibrations are generated

Engineering Contradiction:

Improvepump sizeVSAvoidflow stability

Core Design Contradiction:

Volume of moving objectVSStability of the object's composition

Solution Approach 1:

The patent merges two reciprocating pumps into a compact pump set that maintains a small volume while achieving stable flow output. The combined structure of two pumps working in opposition allows for compact design while eliminating the flow fluctuations characteristic of single-pump systems.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent uses counterbalancing through opposing impact directions of two reciprocating pumps to stabilize flow composition. The first pump's compression stroke coincides with the second pump's drawing stroke, creating a continuous and stable flow output that reduces fluctuations while maintaining compact dimensions.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

3Device complexity

If linear reciprocating pumps are used, then the pump structure is simple, but larger vibrations are produced

Engineering Contradiction:

Improvepump structureVSAvoidvibration

Core Design Contradiction:

Device complexityVSObject-generated harmful factors

Solution Approach 1:

The patent combines two linear reciprocating pumps into a single pump set where their opposing impact directions cancel vibrations. This merging maintains the structural simplicity of linear reciprocating pumps while eliminating the harmful vibration effect through counterbalancing.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent applies counterweight by positioning two linear reciprocating pumps to generate opposite impact forces. The first pump's impact direction is opposite to the second pump's impact direction, creating a counterbalancing effect that eliminates vibrations while preserving the structural simplicity of the linear reciprocating design.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

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 counterbalancing of impact forces and vibrations results in stable fluid delivery and reduced noise, enhancing the accuracy of gas sensors in medical respiration monitoring equipment.

Implementation Method 1

the control system may be designed to output the drive signals that can cause the two reciprocating pumps within the same set to provide opposing impact directions at the same time

Methodology Applied

Scientific EffectVibration counterbalancing: Vibration

Data Source

PatentUS11287410B2Sampling pumps and gas analyzers

Publication Date: 2022.03.29 SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD

AI summary

Provided are sampling pumps and gas analyzers using the sampling pumps. The sampling pump may include at least one reciprocating pump set and a control system. Each reciprocating pump set can include two reciprocating pumps. The control system can output drive signals for controlling reciprocating drawing and compressing operations of the reciprocating pumps, where the control system may be designed to output the drive signals that cause the two reciprocating pumps within the same set to provide opposing impact directions at the same time.