CN2316468Y

CN2316468Y - Under-fulcrum torsional spring type speeder with plus-minus corrector

Info

Publication number: CN2316468Y
Application number: CN 97223186
Authority: CN
Inventors: 王亚伟
Original assignee: WUXI FUEL PUMP AND NOZZLE INST MINISTRY OF MACHINE-BUILDING INDUSTRY
Current assignee: WUXI FUEL PUMP AND NOZZLE INST MINISTRY OF MACHINE-BUILDING INDUSTRY
Priority date: 1997-06-03
Filing date: 1997-06-03
Publication date: 1999-04-28
Anticipated expiration: 2007-06-03

Abstract

The utility model relates to an under-fulcrum torsional spring type speeder with a plus-minus corrector for a diesel engine. The utility model is characterized in that a speed regulation bracket of the utility model is hinged by a bracket and minus correction bracket which can relatively rotate, and the utility model is provided with a plus corrector and a minus corrector. The under-fulcrum torsional spring type speeder with a plus-minus corrector for a diesel engine has the advantage that the requirement of a direct injection type diesel engine can be satisfied because of the speed regulation characteristic of the utility model; the utility model is favorable to reduce exhaust smoke density and reduce exhaust emission, and is convenient to adjust the characteristic of plus-minus correction.

Description

Lower fulcrum torsional spring type speed regulator with check plus minus device

The utility model is a kind of speed regulator of use for diesel engine, particularly a kind of lower fulcrum torsional spring type speed regulator with check plus minus device that is applicable to high speed direct jet diesel engine.

Relevant with the utility model in the prior art is the Chinese patent ZL94246110.X lower fulcrum torsional spring type mechanical governor of Wuxi Inst. of Oil Pump and Oil Nozzle, Ministry of Machine-Building Industry's application.The described speed regulator of this patent has a positive correction device that is contained on the tension rail, but does not have the negative correction device.When therefore this speed regulator was used for high speed direct jet diesel engine, the governor control characteristics of low speed full load section is desirable (seeing dotted portion among Fig. 3 governor control characteristics figure) not really.Exhaust smoke was bigger when diesel engine moved in the low speed full load, and environment is caused certain pollution.

The purpose of this utility model provides a kind of new lower fulcrum torsional spring type speed regulator with check plus minus device.The governor control characteristics of this speed regulator can satisfy the requirement of high speed direct jet diesel engine.Check plus minus device in the speed regulator is simple in structure, easy to adjust.

The technical solution of the utility model is to adopt governor structure shown in the drawings, its major character is that wherein the speed-regulating rack parts are made up of support [27] and negative correction support [21], roller [22], roller pin [24], Returnning spring [23], the pin parts such as [26] that floats, support [27] and negative correction support [21] are hinged by the pin [26] that floats, can relatively rotate (ZL94246110.X lower fulcrum torsional spring type mechanical governor does not have above-mentioned speed-regulating rack, but adopts the supporting rod of a rigidity).Support [27] lower end is connected with governor housing through rest pin [28].Intermediate pin [25] cooperates with hole on the support [27].Intermediate pin [25] two ends penetrate in the hole of negative correction support [21], and this hole and intermediate pin have bigger gap between [25], so two stands can relatively rotate (see figure 2) within the specific limits.Negative correction support [21] upper end is connected with the pull bar [3] of regulating the Injection Pump fuel delivery through straight pin, links to each other with an end of primer spring [2] simultaneously.Roller [22] and roller pin [24] are equipped with in negative correction support [21] middle part.Returnning spring [23] is sleeved on the roller pin [24].The centre of Returnning spring [23] is propped up the angle and is leaned against on the negative correction support [21], and the leg on both sides inserts in the hole of support [27] upper end.The cylindrical of roller during work [22] contacts with the end face of tension rail [16].The lower end of tension rail [16] also is connected with governor housing [6] through rest pin [28].The negative correction device of being made up of negative correction spring [19], negative correction push rod [17], swivel nut [18] and adjusting screw [18] etc. is equipped with at the middle part of tension rail [16].Open small lid on the governor housing and can adjust the pretightening force and the negative correction effective travel h of negative correction spring [19].The top of tension rail [16] leans against on the leg of governor spring [5] on one side, and another side is caught on by positive correction push rod [4].Positive correction push rod [4], corrector cover [7], positive correction spring [8], adjusting nut [9], Adjusting bolt Adjusting screw [10] etc. are formed the positive correction device.The positive correction device is contained on the governor housing [6], and positive correction push rod [4] stretches into governor housing [6], hooks tension rail [16].Turn on acorn nut [11] and can adjust the pretightening force and the positive correction stroke S of positive correction spring [8].

The advantage that the utility model is compared with prior art had is that this new lower fulcrum torsional spring type speed regulator has positive correction device and negative correction device simultaneously.Its governor control characteristics can fully satisfy the requirement of high speed direct jet diesel engine, and the exhaust smoke when reducing the diesel engine full load operation reduces toxic emission, helps environmental protection.Has check plus minus characteristic advantage easy to adjust in addition.

Fig. 1 is the longitudinal section with lower fulcrum torsional spring type speed regulator of check plus minus device.

Fig. 2 is the sectional elevation of speed regulator.

Fig. 3 is the governor control characteristics figure that fuel delivery (or pull bar displacement X) changes with rotational speed N.

Fig. 4 is the speed-regulating rack component drawings.

Further specify the utility model embodiment's structure and working principle below in conjunction with accompanying drawing.

As shown in Figure 1 and Figure 2, speed regulator described in the utility model can be used for the diesel engine in-line fuel injection pump, is rotated together by fuel injection camshaft [1] drive flying hammer bracket [12] and flyball [13].Prestart, pull bar [3] are arranged in maximum oil amount position (the A point of Fig. 3) under the effect of primer spring [2] pulling force.Starting back rotating speed rises, when rotating speed rises among Fig. 3 behind the pairing rotating speed of B point, the thrust of flyball [13] overcomes the pulling force of primer spring [2], and promote support [27] and negative correction support [21] to the clockwise direction rotation through intermediate pin [25] by sliding sleeve [14], T-shaped piece [15], contact with tension rail [16] up to roller [22].At this moment pull bar [3] moves to the position that C is ordered among Fig. 3.

After rotating speed rose to the D point, the thrust of flyball [13] surpassed the pretightening force of Returnning spring [23], and support [27] is clockwise rotated around rest pin [28].At this moment negative correction support [21] rotates counterclockwise around roller pin [24] under the drive of the pin [26] that floats, and drives pull bar [3] and move to the direction that strengthens fuel delivery, till T-shaped piece [15] is run into the end face of negative correction push rod [17].At this moment pull bar [3] is parked on the position that E orders.

After rotating speed rises to the F point, the thrust of flyball [13] surpasses the pretightening force of negative correction spring [19], T-shaped piece [15] promotes negative correction push rod [17] to the right rotates counterclockwise negative correction support [21], and at this moment pull bar [3] (strengthens the fuel delivery direction) again left and moves.The position of pull bar [3] arrives the G point when T-shaped piece [15] is run into tension rail [16].

After rotating speed rises to the H point, flyball [13] by T-shaped piece [15] to the active force of tension rail [16] and positive correction spring [8] the active force of governor spring [5] of making a concerted effort to have surpassed to tension rail [16] by the active force of positive correction push rod [4] tension rail [16].Tension rail [16] and speed-regulating rack (comprising support [27] and negative correction support [21]) clockwise rotate around rest pin [28] together.Positive correction push rod [4] moves right to gap S and is eliminated (see figure 1).At this moment tension rail [16] stop motion, pull bar [3] arrive I point position.Rotating speed rises to the invariant position (see figure 3) of pull bar [3] the process that J orders from the I point.After rotating speed surpassed J point (calibration point), flyball [13] surpassed the active force of governor spring [5] to tension rail [16] to the active force of tension rail [16], and tension rail [16] and support [27], negative correction support [21] are clockwise rotated around rest pin [28] together.Move to cut-out position (K point among Fig. 3) until pull bar [3].

As shown in Figure 1, wherein the characteristics of positive correction device are that the positive correction device is contained on the governor housing [6], adjustment can be carried out in governor housing [6] outside, the pretightening force available adjustment swivel nut [10] of positive correction spring [8] is adjusted, the big or small available adjustment nut [9] of positive correction stroke S is adjusted, positive correction push rod [4] stretches in the governor housing [6], hooks tension rail [16].The negative correction device is contained on the tension rail [16], and the pretightening force of negative correction spring [19] is adjusted by adjusting screw [20], and uses nut check.The big or small available swivel nut [18] of negative correction stroke h is adjusted, and with the outer nut check of swivel nut.

Claims

1. lower fulcrum torsional spring type speed regulator of being made up of parts such as governor housing, flyball, flying hammer bracket, sliding sleeve, speed governing torsion spring, speed-regulating rack, tension rails is characterized in that:

A. speed-regulating rack is made up of support [25] and negative correction support [19], roller [20], roller pin [22], Returnning spring [21], the pin parts such as [24] that floats, and support [25] and negative correction support [19] are hinged by the pin [24] that floats, and can relatively rotate;

B. have two kinds of correctors of positive correction device and negative correction device simultaneously.

2. the lower fulcrum torsional spring type speed regulator with check plus minus device according to claim 1, it is characterized in that positive correction device wherein is made up of positive correction push rod [4], corrector cover [6] positive correction spring [7], adjusting nut [8] and Adjusting bolt Adjusting screw [9] etc., be contained on the governor housing, positive correction push rod [4] stretches into governor housing, hooks tension rail.

3. the lower fulcrum torsional spring type speed regulator with check plus minus device according to claim 1 is characterized in that negative correction device wherein is made up of negative correction push rod [15], swivel nut [16] negative correction spring [17] and adjusting screw [18] etc., is contained on the tension rail.