CN201461095U

CN201461095U - Fuel switch valve in fuel pump governor control system

Info

Publication number: CN201461095U
Application number: CN 200920125619
Authority: CN
Inventors: 苗建中; 徐国勇; 宫锐; 周求文
Original assignee: Guizhou Honglin Machinery Co Ltd
Current assignee: Guizhou Honglin Machinery Co Ltd
Priority date: 2009-08-10
Filing date: 2009-08-10
Publication date: 2010-05-12
Anticipated expiration: 2019-08-10

Abstract

The utility model relates to a fuel switch valve in a fuel pump governor control system, which belongs to fuel switch valves. A coil I (5) and a coil II (6) are respectively wound on a coil rack (2), separated by an insulating tape in the middle, respectively led out, and welded with a leading wire (8); each group has two joints, and the fuel switch valve has four leading wires; a coil housing (1) is covered, and encapsulating compound (3) is coated to form a coil pack; the coil pack is installed in an assembly formed by a pole piece assembly (4) and a valve body (13); and an armature assembly (7), a spring (9), a baffle (11), a baffle spring (10), a nozzle (12) and a plug (14) are installed in the valve body (13), thereby forming the fuel switch valve. The fuel switch valve can be used for cutting off the fuel. When engine needs to stop, the electromagnetic valve is electrified to change the pressure of the stop valve control cavity, and the metering valve fuel is discharged to the low pressure cavity, thereby ensuring the working demands for the engine and being suitable for fuel pump governor control systems.

Description

The fuel tap valve that is used for the fuel pump governor control system

Technical field: the utility model relates to the fuel tap valve, particularly a kind of fuel tap valve that is used for the fuel pump governor control system.

Background technique: in aeroengine control system, there is following defective in fuel tap valve originally:

1, the coil of old-fashioned switch valve has only one group usually, in case break down, valve is with regard to cisco unity malfunction, thereby influences whole engine system cisco unity malfunction.

2, sealing surface adopts the monocycle band to fit, and the sealing difference is a little.

3, the armature component cylindrical was not driven oil groove, influenced the flexibility of armature motion.

4, electromagnetic compatibility is undesirable.

Summary of the invention: the purpose of this utility model is to provide a kind of fuel tap valve that is used for the fuel pump governor control system, utilize this fuel tap valve, single coil structure before changing, the safety reliability of raising product, the monocycle band before changing is fitted, guarantee reliable sealing, the design of not driving oil groove before changing, the bottom produces vacuum when avoiding armature motion, can make the armature component motion simultaneously flexibly, and the power of reducing friction, improve the electromagnetic compatibility of product.

Formation of the present utility model: be made up of coil housing, coil carrier, glue, pole shoe member, coil I, coil II, armature component, lead, spring, baffle plate spring, baffle plate, nozzle, valve body, screw plug, (1) coil adopts the two coil configuration design; (2) sealing surface adopts dicyclo band and plane to fit; (3) armature component adopts the design method of driving oil groove; (4) increase the design that is connected of conductor shielding layer and shell;

Its assembled relation is: coil I and coil II are wound on respectively on the coil carrier, middle separate and draw respectively with insulating tape after, with wire bonds, every group of two joints, totally 4 leads put with coil housing again and encapsulating forms coil block; Coil block is packed in the assembly that pole shoe member and valve body constitute, and respectively armature component, spring, baffle plate, baffle plate spring, nozzle, screw plug is packed in the valve body again, has just formed the fuel tap valve.

Compared with the prior art, the utlity model has following characteristics:

1, coil has adopted two groups, can work simultaneously for these two groups, also can work respectively, and in a single day such one group of coil breaks down, and this valve still can proper functioning, and engine system can be moved safely and reliably, has improved reliability.

2, sealing surface adopts the design method of fitting in dicyclo band and plane, and the monocycle band before changing is fitted, and guarantees reliable sealing.

3, armature component adopts the design method of driving oil groove, the design of not driving oil groove before changing, and the bottom produces vacuum when avoiding armature motion, can make the armature component motion simultaneously flexibly, and the power of reducing friction.

4, increase the design that is connected of conductor shielding layer and shell, improve the electromagnetic compatibility of product.

Description of drawings: Fig. 1 is the utility model structural representation, Fig. 2 is that sealing surface adopts dicyclo band and plane applying figure, Fig. 3 is the sectional view of Fig. 2, Fig. 4 is that the tank structure schematic representation was opened in the armature component employing, Fig. 5 is the right elevation of Fig. 4, Fig. 6 is the outline drawing that coil block is drawn wire 21, and Fig. 7 is the right elevation of Fig. 6, and Fig. 8 is inner enamel insulated round copper wire of coil block and high temperature resistant screened lead connection diagram.

1. coil housings among the figure, 2. coil carrier, 3. glue, 4. pole shoe member, 5. coil I, 6. coil II, 7. armature component, 8. lead, 9. spring, 10. baffle plate spring, 11. baffle plate, 12. nozzles, 13. valve bodies, 14. screw plugs, 15. filler openings, 16. oil outlet, endless belt in 17. sealings, the outer endless belt of 18. sealings, 19. cross oil groove, 20. plastic sheath bobbins, 21. wire, 22. enameled cables, 23. scolders, 24. plastic bushings, 25. the external insulation layer of lead, 26. screen layers, the inner insulating layer of 27. leads, 28. wires.

Embodiment: as shown in Figure 1, coil I 5 and coil II 6 are wound on respectively on the coil carrier 2, middle separate and draw respectively with insulating tape after, with lead 8 welding (every group of two joints, totally 4 leads), put with coil housing 1 again, and encapsulating 3 forms coil blocks, and two leads are identified.Coil block is packed in the assembly that pole shoe member 4 and valve body 13 constitute, and the annexation of pressing Fig. 1 is again packed armature component 7, spring 9, baffle plate 11, baffle plate spring 10, nozzle 12, screw plug 14 into respectively in the valve body 13, has just formed the fuel tap valve.On the afterbody inner nozzle 12 of valve body 13 and screw plug 14, filler opening 15 is arranged, oil outlet 16 is arranged in a side of valve body 13.

This valve is when no electric circuit, and fit in the aperture that the elastic force that spring 9 produces is pushed baffle plate 11 to the right side and nozzle 12, the oil of filler opening 15 can not be passed through, and seals.During coil electricity, coil I 5 and (or) coil II 6 produces electromagnetic forces, electromagnetic force drives armature component 7, inhale armature component 7 moving to the left side, baffle plate 11 also can move to the left side under the effect of baffle plate spring 10 and inlet pressure, and at this moment filler opening 15 just communicates with oil outlet 16.Thereby realize valve under the situation of energising or outage, the switching function of valve.

As Fig. 2, shown in Figure 3, sealing surface adopts interior endless belt 17 of sealing and the outer endless belt 18 dicyclo bands of sealing to combine with the plane, guarantees reliable sealing.

As Fig. 4, shown in Figure 5, armature component 7 adopts drove oil groove 19, and the bottom produces vacuum when avoiding armature motion, can make the armature component motion simultaneously flexibly, and the power of reducing friction.

As Fig. 6, Fig. 7, shown in Figure 8; coil adds man-hour; successively with the enameled cable 22 of coil I 5 and coil II 6 (see figure 6) in the coil carrier 2 in accordance with regulations, plastic bushing 24 protections (seeing Fig. 8 left side) of conductor welding back and usefulness in two enameled cables, the 22 usefulness scolders 23 of every group of circle and the lead 8.In distance coil carrier 2 outlet ports; external insulation layer in the lead 8 25 is peelled off one section; expose the screen layer 26 that is between inner insulating layer 27 and the external insulation layer 25; and after the screen layer 26 that will locate and wire 28 welding; protect (see Fig. 8 in the middle of) with plastic sheath bobbin 20; wire 21 is after lead 8 is drawn; wire 21 is fitted in (see figure 7) on the end face of coil carrier 2; when coil is contained on the product; the wire 21 that is fitted on coil carrier 2 end faces has just contacted (see figure 1) with the end face of valve body 13; be the screen layer of lead and shell even connected, improved the electromagnetic compatibility of product.

Claims

1. fuel tap valve that is used for the fuel pump governor control system, be made up of coil housing, coil carrier, glue, pole shoe member, coil I, coil II, armature component, lead, spring, baffle plate spring, baffle plate, nozzle, valve body, screw plug, it is characterized in that: (1) coil adopts the two coil configuration design; (2) sealing surface adopts dicyclo band and plane to fit; (3) armature component adopts the design method of driving oil groove; (4) increase the design that is connected of conductor shielding layer and shell;

Its assembled relation is: coil I (5) and coil II (6) are wound on respectively on the coil carrier (2), middle separate and draw respectively with insulating tape after, with lead (8) welding, every group of two joints, totally 4 leads use coil housing (1) to put and encapsulating (3) formation coil block again; Coil block is packed in the assembly that pole shoe member (4) and valve body (13) constitute, respectively armature component (7), spring (9), baffle plate (11), baffle plate spring (10), nozzle (12), screw plug (14) are packed into again in the valve body (13), just formed the fuel tap valve.