CN202280518U

CN202280518U - Electromechanical switching control mechanism of double-pulse speed governor

Info

Publication number: CN202280518U
Application number: CN201120413187XU
Authority: CN
Inventors: 杨恩志; 宋毕春; 雷和练
Original assignee: Chongqing Hongjiang Machinery Co Ltd
Current assignee: Chongqing Hongjiang Machinery Co Ltd
Priority date: 2010-10-26
Filing date: 2011-10-26
Publication date: 2012-06-20
Anticipated expiration: 2021-10-26
Also published as: CN102352795B; CN102352795A

Abstract

The utility model discloses an electromechanical switching control mechanism of a double-pulse speed governor, and the speed governor is automatically switched to mechanical control from electronic control when the electronic control part is failed. Under the normal condition, when the load of a diesel engine is increased and the speed of the diesel engine is decreased, the control current of an electromagnet of an actuating mechanism is increased, and a control valve moves downward, thus high-pressure oil flows to the lower part of a servo piston; and the left end of a switching lever is connected with a resetting piston through a pin shaft and moves downward, thus a main control valve moves downward, and a power piston moves downward and fuel oil is increased, thereby driving an output shaft to rotate towards an oiling direction so as to improve governing speed. When the electronic control part of the speed governor is failed, and the rotation speed of the diesel engine is decreased to be lower than about 5% of the normal speed set by the speed governor, the switching lever and a slide valve guide rod are completely disconnected and are not contacted any more, at the moment, a high-response electromagnetic servo mechanism does not act any longer, and the rotation speed of the diesel engine is controlled by the mechanical part of the speed governor.

Description

A kind of dynamo-electric switching controls mechanism of double pulsing speed regulator

Technical field

The utility model belongs to the diesel engine field, and being specifically related to a kind of power that is applicable to is the dynamo-electric switching controls mechanism of the double pulsing speed regulator of the serial diesel engine about 5000kW.

Background technique

Along with the develop rapidly of electronic technology, high-power diesel engine develops into today with speed regulator, and bigger variation has taken place.From Purely mechanical speed regulator, hydrodynamic governor the earliest, generally adopt electronic speed regulator, electrohydraulic governor to today.

Rotating speed induction mechanism, control mechanism and the actuator of mechanical speed governor all adopt machinery type, and its advantage is that reliability is high, but has the shortcoming that ability to work is less, the speed regulator precision is low, generally only is applied to the miniature high-speed diesel engine.

The rotating speed induction mechanism of hydrodynamic governor adopts machinery type; And control mechanism and actuator adopt hydraulic way; Its advantage is that ability to work is big, reliability is high, but adjusting speed accuracy is general, therefore is widely used in the less demanding middle low speed high-power diesel engine of adjusting speed accuracy.

The control mechanism of electronic speed regulator adopts the electronics mode, and actuator adopts machinery type, be characterized in that adjusting speed accuracy is high, but ability to work is less, and poor reliability generally is applied to the not high miniature high-speed diesel engine of reliability requirement.

The control mechanism of the fast device of electricity liquid electricity adopts the electronics mode, and actuator then adopts hydraulic way, therefore have higher ability to work and adjusting speed accuracy, but its reliability is general, has been widely used in the middle low speed high-power diesel engine of having relatively high expectations at present.

Summary of the invention

For overcoming the problems referred to above that exist in the existing technology, the utility model discloses a kind of dynamo-electric switching controls mechanism that is used for the double pulsing speed regulator, the utility model specifically adopts following technological scheme:

A kind of dynamo-electric switching controls mechanism belongs to the part of double pulsing speed regulator actuator, and said switching mechanism comprises parts such as electromagnetic coil, annular permanent magnnet, pilot controlled slide valve and servopiston, switching lever, reaction lever, return piston.

Said annular permanent magnnet is mounted in the said magnet coil, and the inner ring surface of said annular permanent magnnet is fixed on the core bar of pilot controlled slide valve, and the upper end of core bar is equipped with bias spring.

The upper end of said return piston is fixedly connected an end of said reaction lever, and the other end of said reaction lever is fixedly connected and switches lever.

One end of said switching lever is connected through the main control guiding valve elastic floating that switches clevis and actuator, and the other end is connected with the power piston bar, and reaction lever is connected and switches inclined to one side clevis one side of switching in lever middle part.

Height response servomechanism in actuator receives the current controling signal that electronic controller produces; Will between electromagnetic coil and said annular permanent magnnet, produce an electromagnetic force that makes progress; The drive pilot controlled slide valve moves up and down, thereby the control return piston moves up and down, when servopiston moves up and down through said switching lever and switching clevis to the main control guiding valve generation effect of actuator; Make the same moved further of spool position of main control guiding valve of actuator; Pilot pressure oil flows into or flows out the oil of power piston, thereby realizes the adjusting control function to diesel engine speed, and this process is an electronic control mode.

If speed probe is malfunctioning or electronic control signal is interfered or when losing efficacy, electromagnetic force is zero, bias spring power produces a downward power; The drive pilot controlled slide valve moves down; The lever drives return piston moves down through switching, servopiston moves up, and through said switching lever and the main control guiding valve generation effect of switching clevis to actuator, makes the main control guiding valve of actuator move down; Pilot pressure oil flows into power piston; Power piston moves down, and when diesel engine speed was increased to the rotating speed of setting, pilot controlled slide valve 7 also returned to the equilibrium position that hides the control mouth with the main control guiding valve; Diesel engine is being set normal operation under the speed-changing, and this process is a mechanical control method.So far, handoff procedure finishes.

The speed-changing of said dynamo-electric switching controls mechanism can preestablish and adjust, thereby satisfies the particular requirement of different diesel engines.

The advantage of the utility model:

(1) in case when electronic control component breaks down suddenly, can realize the quick automatic switching of electromechanical control.

(2) significantly improved the reliability that marine diesel engine uses electronic speed regulator.

(3) be convenient to realize the full-automation of watercraft engine room.

Adopted the compound speed regulator of double pulsing of this control mechanism to possess the advantage of hydrodynamic governor and electrohydraulic governor simultaneously; And overcome both shortcoming; Therefore have that ability to work is big, the smart height of speed governing and the high advantage of reliability, be specially adapted to have the diesel engine of specific (special) requirements.

Description of drawings

Fig. 1 is dynamo-electric switching controls mechanical work principle figure;

Fig. 2 is a dynamo-electric switching controls mechanism basic block diagram.

Wherein: 1, return piston, 2, switch lever, 3 reaction levers, 4, electromagnetic coil, 5, annular permanent magnnet, 6, servopiston, 7, pilot controlled slide valve, 8, switch clevis, 9, bias spring, 10, the power piston bar.

Embodiment

Below in conjunction with Figure of description the technological scheme of the utility model is done further explain.

Referring to Fig. 1; This electromechanics switching controls mechanism belongs to the part of double pulsing speed regulator actuator; Be the servo regulation structure of a cover electromagnetic conversion leading type, comprise electromagnetic coil 4, annular permanent magnnet 5, pilot controlled slide valve 7 and servopiston 6, switch parts such as lever 2, reaction lever 3, return piston 1.Annular permanent magnnet 5 is mounted in the said magnet coil 4, and the inner ring surface of annular permanent magnnet 5 is fixed on the core bar of pilot controlled slide valve 7, and the core bar upper end is equipped with bias spring 9.The upper end of return piston 1 is fixedly connected an end of reaction lever 3, and the other end of reaction lever 3 is fixedly connected and switches lever 2.Switching lever 2 one ends connect power piston bar 10, switch lever 2 the other ends and are connected through the main control guiding valve elastic floating that switches clevis 8 and actuator, and reaction lever 3 is connected switching lever 2 middle parts and switches clevis 8 one sides partially.

Its working principle is: the dynamo-electric switching controls mechanism in actuator receives the current controling signal that electronic controller produces; Will between electromagnetic coil 4 and said annular permanent magnnet 5, produce an electromagnetic force that makes progress; Driving pilot controlled slide valve 7 moves up and down; Thereby control return piston 1 moves up and down; When servopiston 6 moves up and down, through said switching lever 2 and the main control guiding valve generation effect of switching 8 pairs of actuators of clevis, make the same moved further of spool position of main control guiding valve of actuator, pilot pressure oil flows into or flows out the oil of power piston; Thereby realize the adjusting control function to diesel engine speed, this process is an electronic control mode.

If speed probe is malfunctioning or electronic control signal is interfered or when losing efficacy, electromagnetic force is zero, bias spring power produces a downward power; Driving pilot controlled slide valve 7 moves down; Lever 2 drive return pistons 1 move down through switching, servopiston 6 moves up, and through said switching lever 2 and the main control guiding valve generation effect of switching clevis to actuator, make the main control guiding valve of actuator move down; Pilot pressure oil flows into power piston; Power piston moves down, and when diesel engine speed was increased to the rotating speed of setting, pilot controlled slide valve 7 also returned to the equilibrium position that hides the control mouth with the main control guiding valve; Diesel engine is being set normal operation under the speed-changing, and this process is a mechanical control method.So far, handoff procedure finishes.

This control mechanism in the course of the work, the relation between electromagnetic force, feedback spring power and the bias spring power is following:

If F01 is an electromagnetic force, F02 is a feedback spring power, and F03 is a bias spring power,

As control valve during: F01+F03=F02 in the equilibrium position;

When the control electric current runs off, F01=0, rotating speed reduces, at this moment: F02＞F03.

Claims

1. the dynamo-electric switching controls mechanism of a double pulsing speed regulator, said motor switching controls mechanism comprises electromagnetic coil (4), annular permanent magnnet (5), pilot controlled slide valve (7), servopiston (6), switches lever (2), reaction lever (3) and return piston (1); It is characterized in that:

Said annular permanent magnnet (5) is installed in the said magnet coil (4), and the inner ring surface of said annular permanent magnnet (5) is fixed on the core bar of pilot controlled slide valve (7), and the upper end of core bar is equipped with bias spring (9);

The upper end of said return piston (1) is fixedly connected an end of said reaction lever (3), and the other end of said reaction lever (3) is fixedly connected and switches lever (2);

One end of said switching lever (2) is connected through the main control guiding valve elastic floating that switches clevis (8) and actuator, and the other end is connected with power piston bar (10), and reaction lever (3) is connected and switches inclined to one side clevis one side of switching in lever middle part.