Pump Device With Cyclone Separator For High Flow Rate Separation
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Solution Overview
Problem
Existing pump devices struggle to meet the demand for larger flow rates of coolant processing in machine tools while effectively separating foreign matter from operating fluids, as they often require regular maintenance and have limitations in solid-liquid separation efficiency.
Innovation Solution
A pump device configuration featuring a centrifugal pump with an impeller as the first pump, a second centrifugal pump for suction assistance, a cyclone separator for solid-liquid separation, and a guide member to enhance swirl flow, along with a conical throttle member to adjust flow velocity, allowing for efficient separation and discharge of foreign matter without the need for additional relief valves or complex piping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a displacement pump is used to pump operating fluid, then the pump can handle viscous fluids, but the discharge flow rate is limited and cannot satisfy the demand for larger flow rates
Solution Approach 1:
The pump system is divided into two separate pumps: a displacement pump (first pump) for handling viscous fluids and a centrifugal pump (second pump) for providing high flow rate. This segmentation allows each pump to specialize in its optimal function, resolving the contradiction between flow rate and viscosity handling capability
Solution Approach 2:
The patent combines two different pump types (displacement pump and centrifugal pump) into a single integrated system with common drive mechanism. The displacement pump ensures reliable viscous fluid handling while the centrifugal pump boosts the overall discharge flow rate, achieving both requirements simultaneously
2Manufacturing precision
If a cyclone separator is used for solid-liquid separation, then foreign matter can be separated from operating fluid, but the separated foreign matter needs a discharge mechanism adding device complexity
Solution Approach 1:
The cyclone separator utilizes centrifugal force generated by its own structure to automatically separate and discharge foreign matter. The separated chips are ejected through the vortex finder without requiring external discharge mechanisms, making the system self-service and reducing complexity
Solution Approach 2:
The cyclone separator uses hydraulic principles where the rotating fluid flow creates a vortex that generates centrifugal force. This pneumatic-hydraulic action automatically separates solids from liquid and provides self-cleaning discharge, eliminating the need for mechanical discharge devices
3Device complexity
If the first pump is positioned above the operating fluid storing portion, then the pump can be compactly arranged, but the pump cannot effectively suck up operating fluid due to poor self-suctioning performance
Solution Approach 1:
The centrifugal pump acts as an intermediary between the operating fluid storing portion and the displacement pump. It first draws fluid from the storing portion and delivers it to the displacement pump, enabling the compact vertical arrangement while maintaining effective fluid intake through its superior suction capabilities
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 configuration enables handling of large flow rates (150 liters/minute or more) with improved solid-liquid separation efficiency, reduced maintenance needs, and cost savings by eliminating the requirement for relief valves and separate piping for foreign matter processing.
Implementation Method 1
at least one cyclone separator provided in a region above the second pump and below a suction opening of the first pump, for receiving operating fluid pumped up by the second pump, having a function of separating the operating fluid into a clean operating fluid not containing foreign matter and an operating fluid containing the foreign matter
Implementation Method 2
a first pump (a centrifugal pump having an impeller, for example) provided above an operating fluid (coolant, for example) storing portion
Implementation Method 3
a first pump (a centrifugal pump having an impeller, for example) provided above an operating fluid (coolant, for example) storing portion
Data Source
Figure 1
Figure 2~14
Figure 4
AI summary
The purpose of the present invention is to provide a pump device which has the function of separating foreign matter from operating fluid containing foreign matter and which can accommodate an increase in the flow rate of the operating fluid. This pump device has: a first pump (3); a second pump (8) which has a rotating shaft coaxial with the rotating shaft (10) of the first pump (3) and which is provided below the suction opening (30i) of the first pump (3) ; at least one cyclone (6) which is disposed in a region above the second pump (8) and below the suction opening (30i) of the first pump(3) and which has the function of separating foreign matter from operating fluid; and a discharge opening (46o) which discharges operating fluid which contains the foreign matter separated by the cyclone(6).