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Hydraulic spring automatic hydraulic load-variable device

A hydraulic spring and variable loading technology, applied in fluid pressure actuators, grain processing, servo motors, etc.

Active Publication Date: 2011-05-18
北京博希格动力技术有限公司
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Problems solved by technology

[0003]The purpose of the present invention is to provide a hydraulic spring automatic variable loading device to solve the problem that the traditional MPS coal mill cannot be adjusted according to the output of the coal mill during operation. Timely and automatic adjustment of the loading force, resulting in a technical problem of weak load adaptability

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Embodiment Construction

[0015] The present invention adopts the system analysis and design concept that one unit is equipped with a set of hydraulic oil station, the transformation cost is low, the equipment maintenance amount is small, the structure is simple and reliable, and some devices with constant loading are reserved, which can better adapt to the change of unit load , to meet a wider range of load changes.

[0016] This set of hydraulic spring automatic variable loading device adopts a central power unit with double pumps, and is connected with a separate valve station corresponding to each coal mill. Stainless steel pipes connect the valve station to the three hydraulic cylinders at the bottom of the coal mill. , the hydraulic cylinder is connected to the spring frame of the coal mill through the loading rod next to the coal mill. When the hydraulic pressure from the central power unit is applied to the upper part of the hydraulic cylinder through the valve station, the loading rod moves do...

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Abstract

The invention discloses an automatic variable loading device for a hydraulic spring. A central power unit with dual pumps is adopted and is connected with an independent valve station corresponding to each coal pulverizer; a pipeline is connected to the valve station to three hydraulic cylinders of the bottom of the coal pulverizer; and the hydraulic cylinder is connected with a spring rack of the coal pulverizer through a loading lever near the coal pulverizer. Each oil pump set of the central power unit comprises a high-pressure axle flow piston pump, a low-pressure gear pump and an electric motor. The electric motor of each pump set drives the high-pressure axle flow piston pump and the low-pressure gear pump to operate so as to pump hydraulic oil to an oil supply pipeline and transport the hydraulic oil to the valve station. The hydraulic oil with constant pressure from a main oil station is transported to the hydraulic cylinder through the valve station; and subsequently, the hydraulic oil reflows to a main oil tank of the main oil station. The device can solve the technical problems that the prior MPS coal pulverizer fails to automatically adjust the loading force in time according to the power output of the coal pulverizer in operation, thereby causing the weak capacity of load adaptability.

Description

technical field [0001] The invention relates to a hydraulic spring automatic variable loading device. technical background [0002] At present, in the coal-fired power plants built in the early stage in China, quite a few MPS coal mills still use the old-fashioned loading method: fixed spring loading. In actual operation, this kind of coal mill has exposed many shortcomings, the biggest drawback of which is that its loading force cannot be automatically adjusted in time according to the output of the coal mill during operation (that is, it is a constant load). The magnitude of its loading force is adjusted offline in advance. In order to reduce the vibration of the coal mill, it is necessary to ensure the minimum output of the coal mill or above it, so that the minimum output will be large, which will affect the operation stability of the unit at low load; at the same time, when increasing the output of the coal mill, it is not necessary It can exceed the output under its...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C15/00F15B11/17
Inventor 黄锏马煜王振泽张付海
Owner 北京博希格动力技术有限公司
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