CN201277095Y

CN201277095Y - Fuel oil reversal valve in engine control system

Info

Publication number: CN201277095Y
Application number: CNU2008200966587U
Authority: CN
Inventors: 苗建中; 徐国勇; 龚锐; 申波
Original assignee: Guizhou Honglin Machinery Co Ltd
Current assignee: Guizhou Honglin Machinery Co Ltd
Priority date: 2008-09-22
Filing date: 2008-09-22
Publication date: 2009-07-22
Anticipated expiration: 2018-09-22

Abstract

The utility model provides a fuel reversing valve whose structure is improved, and comprises a valve body 1, a pole shoe 2, a coil component 3, a keeper 4, a keeper tube 5, an ejector pin 6, an aprons 7, a guide seat 8, a valve 9, a spring 10 and a spring seat 11 and the like, wherein one end of the ejector pin 6 is pressed in the keeper 4 to form a keeper component, the guide seat 8 is pressed in the pole shoe 2 to form a pole shoe component, the keeper component and the pole shoe component are commonly arranged in the keeper tube 5, an opening end of the keeper tube 5 is embedded in a groove of the pole shoe 2 through squeezing a nosing to form a valve core component, then an electromagnet is formed after a coil 3 is arranged, the spring seat 11, the spring 10 and a valve 9 are orderly arranged in the valve body 1, the spring 10 is fixed in the spring seat 11, and a slide valve matching part is combined and formed after the aprons 7 is sealed. When assembling, the spring seat 11 is put from the left end, the electromagnet and the slide valve matching part are connected through thread, thereby guaranteeing the whole sealing performance of products.

Description

Fuel oil selector valve in the engine control system

Technical field

The present invention relates to a kind of fuel oil selector valve, particularly relate to the fuel oil selector valve in the aeroengine control system.

Background technique

In aeroengine control system, fuel oil selector valve originally, as shown in Figure 1, there is following defective in this selector valve:

Old-fashioned selector valve slide valve couple spare is an integral body with electromagnet, because this valve required precision height, the apolegamy size is many, is not easy to assembling and debugging, causes up-to-standard rate lower; The fitting surface of old-fashioned valve armature and armature pipe is right cylindrical, and armature and armature pipe surface of contact are big, and frictional force is big; Old-fashioned in addition valve armature pipe adopts two ends to close up, and sealing is relatively poor, and the manufacturability during the spring seat assembling also is difficult to guarantee.

Summary of the invention

In order to overcome the above shortcoming of old-fashioned valve, the invention provides a kind of fuel oil selector valve (see figure 2) of architecture advances.This selector valve comprises: valve body 1, pole shoe 2, coil block 3, armature 4, armature pipe 5, push rod 6, cushion rubber 7, guide holder 8, valve 9, spring 10, spring seat 11 component such as grade.One end of push rod 6 is pressed in the armature 4 and forms armature component, guide holder 8 is pressed in the pole shoe 2 and forms pole shoe member, armature component and pole shoe member are packed in the armature pipe 5 jointly, by the extruding closing in opening end of armature pipe 5 is embedded in the groove of pole shoe 2, form mangetic core assembly, load onto coil 3 backs then and form electromagnet, in design, armature 4 front ends are designed to certain angle [alpha], form the air guide angle, when avoiding armature 4 motions with armature pipe 5 generation vacuum; There is one section supporting part P at armature 4 middle parts, and armature 4 is conical surface M with the counterface of pole shoe 2, and has increased guide holder 8 in pole shoe 4, move in armature pipe 5 flexibly and the power of reducing friction to guarantee armature 4; With spring seat 11, spring 10 and valve 9 valve body 1 of packing into successively, spring 10 is fixed in the spring seat 11, constitute slide valve couple spare, in order to guarantee that spring seat 11 is connected with the reliable of valve body 1, be designed to the right-hand member of valve body 1 step-like, during assembling, spring seat 11 is put into from left end, the joint N of electromagnet and slide valve couple spare is with being threaded, by cushion rubber 7 sealings, in order to prevent to become flexible, after qualified to the performance adjustment of fuel oil selector valve, to also rivet between the large end face of pole shoe in the mangetic core assembly and the valve body end face, thereby guaranteed the overall tightness of product.

Fuel oil selector valve of the present invention is a kind of two position three way directional control valve.(see shown in Figure 2) during no electric circuit, the elastic force that spring 10 produces is pushed valve 9 and armature 4 to the left side, the right side at the B mouth, valve body and valve form opening D, on the left side of B mouth, valve body and valve form lap E simultaneously, and (seeing shown in Figure 3) seals, fuel oil advanced the A mouth from the B mouth and went out as seen from Figure 2 this moment; During energising, coil block 3 produces electromagnetic force, and electromagnetic force drives armature 4, and armature 4 is drawn onto the limit on the right-right-hand limit position, by push rod 6, overcome the elastic force of return spring 8, promote valve 9 and move right, on the left side of B mouth, valve body and valve form certain opening, simultaneously form certain lap at B mouth right side valve body and valve, seal, fuel oil advances the C mouth from the B mouth and goes out at this moment.

In order to improve the sealing of valve body, armature pipe 5 adopts overall structure, an end opening (seeing shown in Figure 5) only, only opening end is closed up during assembling, changed the structure that all closes up in armature pipe two ends in the past, slide valve couple spare and electromagnet be with being threaded, and with cushion rubber 7 sealings (seeing shown in Figure 2), after performance adjustment is qualified.

Description of drawings

Fig. 1 is the structural representation of old-fashioned selector valve.

Fig. 2 is the structural representation of selector valve of the present invention.

Fig. 3 is the valve body and the valve cooperating structure schematic representation of selector valve of the present invention.

Fig. 4 is the mangetic core assembly structural representation of selector valve of the present invention.

Fig. 5 is the armature pipe structural representation.

Among the figure: 1-valve body, 2-pole shoe, 3-coil block, 4-armature, the 5-armature pipe, 6-push rod, 7-cushion rubber, 8-guide holder, the 9-valve, 10-spring, 11-spring seat, the A-fuel outlet, B-fuel inlet, C-fuel outlet, open part between D-valve body and valve, the lap between E-valve body and valve, the counterface of M-armature and pole shoe, the joint L-push rod of N-electromagnet and slide valve couple spare exceeds the length of guide holder right side, the supporting part at P-armature middle part, α-air guide angle.

Embodiment

Now with the example that is designed to of the fuel oil selector valve in certain aeroengine control system.As shown in Figure 2, this valve comprises valve body 1, pole shoe 2, coil block 3, armature 4, armature pipe 5, push rod 6, cushion rubber 7, guide holder 8, valve 9, spring 10, spring seat 11 component such as grade.The air guide angle α of armature 4 front ends is set at 15 °, the supporting part P at armature 4 middle parts is set at 2.5mm, armature 4 is 90 ° with the conical surface M that cooperates of pole shoe 2, one end of push rod 6 is pressed in the armature 4 and forms armature component, guide holder 8 is pressed in the pole shoe 2 forms pole shoe member, armature component and pole shoe member are packed in the armature pipe 5 jointly, embed in the groove of pole shoe 2 by the extruding opening end that makes armature pipe 5 that closes up, form the mangetic core assembly (see figure 4), load onto coil 3 backs then and form electromagnet.During no electric circuit, push rod 6 can not exceed the right side of guide holder 8, and during energising, push rod 6 need exceed the right side of guide holder 8, and its length L=0.6 ± 0.01mm, this value are exactly the stroke of valve.With spring seat 11, spring 10 and valve 9 valve body 1 of packing into successively, spring 10 is fixed in the spring seat 11, after cushion rubber 7 sealings, constitute slide valve couple spare, the right side by reconditioning valve body 1 and the left side of valve 9 guarantee the following requirement of slide valve couple spare: when the valve no electric circuit, for flow and the sealing that guarantees valve, valve body 1 and D (the be opening value)=0.5 ± 0.1mm (see shown in Figure 3) of valve 9 in the formation of the right side of oil outlet, E (the being lap)=0.08～0.1mm that forms on the left side; When valve is switched on, electromagnet promotes valve 9 toward moving right, D (being the opening value)=0.5 ± 0.1mm that valve body 1 and valve 9 are formed on the left side of oil outlet, E (the being lap)=0.1～0.2mm that forms on the right side, thus reach valve commutation and dependable flow and sealing requirements under energising or cold situation.

Claims

1, fuel oil selector valve in a kind of engine control system, it is characterized in that: one section of this fuel oil selector valve push rod (6) is pressed into formation armature component in the armature (4), guide holder (8) is pressed into and forms pole shoe member in the pole shoe (2), armature component and pole shoe member are packed in the armature pipe (5) jointly, by the extruding closing in opening end of armature pipe (5) is embedded in the groove of pole shoe (2), form mangetic core assembly, load onto coil (3) back then and form electromagnet, with spring seat (11), spring (10) and valve (9) valve body (1) of packing into successively, after cushion rubber (7) sealing, constitute slide valve couple spare, electromagnet and slide valve couple spare are with being threaded.

2, the fuel oil selector valve in the engine control system according to claim 1 is characterized in that: the front end of armature (4) has an air guide angle (α), and there is one section supporting section (P) at the middle part.

3, the fuel oil selector valve in the engine control system according to claim 1 is characterized in that: the right-hand member of valve body (1) becomes step-like.

4, the fuel oil selector valve in the engine control system according to claim 1 is characterized in that: armature (4) is the conical surface with the counterface of pole shoe (2).

5, the fuel oil selector valve in the engine control system according to claim 1 is characterized in that: armature pipe (5) adopts overall structure, only an end opening.