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Speed regulating device for double pulse mechanical hydraulic-pressure type diesel engine

A technology of mechanical hydraulic and speed regulating devices, which is applied in the direction of mechanical equipment, machine/engine, engine control, etc., to achieve the effect of stable speed regulation and good stability

Inactive Publication Date: 2008-07-23
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mechanical or hydraulic governors are not sensitive to load changes, while power station diesel engine speed changes lag behind load changes, so pure mechanical or hydraulic governors cannot meet the speed regulation requirements of power station diesel engines with variable loads

Method used

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  • Speed regulating device for double pulse mechanical hydraulic-pressure type diesel engine
  • Speed regulating device for double pulse mechanical hydraulic-pressure type diesel engine

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Embodiment Construction

[0019] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0020] Referring to FIG. 1 , in FIG. 1 , 31 is an electronic control module, and 32 is a current sensor. The rotational speed is transmitted to the governor by the elastic gear 22 and the pinion 21 installed on the camshaft of the fuel pump. A hydraulic servo motor piston 7 with a pilot valve 8 is installed in the bore of the housing. The main spring 5 of the speed regulating device is installed on the pilot valve, and the flange of the pilot valve is fixed on the support seat 20 by the lock ring. The flyweight 19 also rests on the support seat 20 . Flyweight 19 and spring 5 are sensitive elements of the speed regulating device. The servo motor of the speed regulating device is made up of piston 7 and bearing spring 6. There are two grooves at the tail end of pilot valve, and the slide block that links to each other with lever 18 is arranged in the groove.

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Abstract

The invention provides a speed adjusting gear for a double pulse hydromechanical diesel engine, comprising a speed regulator and a load regulator, which is characterized in that a hydraulic servomotor piston with a pilot valve is arranged in a hole of a casing of the speed regulator; a main spring is arranged at one end of the pilot valve fixed on a support unit at the other end; a fly hammer is propped against the support unit; two slots are arranged on the pilot valve, and a sliding block connected with a lever is arranged in the slots; the load regulator being composed of a differential electromagnet, a slide valve and a servo motor controlling momentum feedback is arranged on the speed regulator. The speed adjusting gear for a double pulse hydromechanical diesel engine has the advantages of adaptability and versatility for different sets as well as stable and reliable speed regulation; for example, when the load regulator fails, the speed adjusting gear is able to separately regulate the rotational speed of the diesel engine with excellent stability in the regulating process; a reaction rate of the speed adjusting gear is improved with the fast load regulator, transient overshoot is reduced, and the speed regulation performance of the speed governor is improved.

Description

(1) Technical field [0001] The invention relates to a control method of a combustion engine, in particular to a speed control method of a diesel engine. (2) Background technology [0002] The stability of the frequency of the diesel generator set mainly depends on the speed regulation characteristics of the diesel engine speed control system. The load of the diesel engine in the power station is constantly changing, and the change of the load will affect the dynamic accuracy of the diesel engine speed control system, thereby affecting the stability of the frequency of the power system. Therefore, the power station diesel engine requires the speed control system to have a wide working range, fast response, high sensitivity, stable and reliable work, and good dynamic and steady-state performance in the entire operating range. [0003] In the patent application document with the patent application number 200510040007.7, a technical scheme titled "Double Pulse Mechanical Hydrau...

Claims

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Application Information

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IPC IPC(8): F02D1/04
Inventor 姚崇李海涛孙军赵华伟刘友
Owner HARBIN ENG UNIV
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