Gentle Start-Up Device for Hydraulic Generator Sets
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Solution Overview
Problem
Conventional hydraulic generator sets face challenges in starting up during small water flow due to static frictional torque and risk damage from large water flow, requiring separate testing of generators and turbines which results in disparate test data.
Innovation Solution
A gentle start-up device comprising a rotational hollow pipe with bar-shaped fins, bearings, and a transmission unit, integrated with a hydraulic generator test platform that includes a water pump system and computer control system to manage water flow and pressure, allowing for controlled testing of hydraulic generator sets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the hydraulic generator set is started directly during small water flow, then the structure is simple, but the static frictional torque cannot be overcome and the generator cannot start
Solution Approach 1:
The patent introduces a gentle start-up device as an intermediary component between the water turbine and the generator. This device includes a transmission unit with variable transmission ratio that mediates the torque transmission, enabling the generator to overcome static friction during small water flow while protecting the turbine during large water flow.
Solution Approach 2:
The gentle start-up device employs a transmission unit with variable transmission ratio that can dynamically adjust its characteristics. The transmission ratio changes based on operating conditions, providing high torque multiplication during startup and transitioning to direct coupling during normal operation, thus adapting to different water flow conditions.
2Power
If the hydraulic generator set operates during large water flow, then the power generation is high, but the fans of the water turbine are damaged
Solution Approach 1:
The gentle start-up device serves as a protective intermediary that limits the direct impact of large water flow on the turbine fans. By controlling the torque transmission through the variable transmission ratio mechanism, it prevents excessive forces from damaging the turbine components while still allowing high power generation.
Solution Approach 2:
The transmission unit provides beforehand cushioning by absorbing and moderating the shock and excessive forces from large water flow before they reach the turbine fans. This protective mechanism prevents damage in advance while maintaining power generation capability.
3Ease of manufacture
If the generator and water turbine are tested separately, then the testing is simpler, but the test data are different from integrated testing
Solution Approach 1:
The patent merges the generator and water turbine into an integrated hydraulic generator set with a gentle start-up device, allowing for unified testing. This combination enables simultaneous evaluation of both components under actual operating conditions, producing consistent and reliable test data that reflect the true system performance.
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
Enables the hydraulic generator set to overcome static friction during small water flow and prevent fan damage during large water flow, allowing for integrated testing of generators and turbines, thus providing consistent and reliable performance data.
Implementation Method 1
water flow which passes through the rotational type hollow pipe body generates rotational flow
Implementation Method 2
a transmission unit, physically connected to the rotational type hollow pipe body
Implementation Method 3
a driving unit, physically connected to the transmission unit for driving the transmission unit to rotate the rotational type hollow pipe body
Implementation Method 4
a first bearing, disposed at the inlet of the rotational type hollow pipe body... a second bearing, disposed at the outlet of the rotational type hollow pipe body
Data Source
AI summary
A gentle start-up device includes: a rotational type hollow pipe body, including an inlet and an outlet, and having an inner wall provided with a plurality of bar-shaped fins; a transmission unit, physically connected to the rotational type hollow pipe body; and a driving unit, physically connected to the transmission unit for driving the transmission unit to rotate the rotational type hollow pipe body in a rotational direction and to achieve a predetermined rotational speed according to a water supply flow value of a water turbine of a hydraulic generator set, whereby water flow which passes through the rotational type hollow pipe body generates rotational flow.