CN201277113Y

CN201277113Y - Gas jet valve of CNG engine gas jet control system

Info

Publication number: CN201277113Y
Application number: CNU2008200967471U
Authority: CN
Inventors: 苗建中; 司徒亮; 姚桂芬
Original assignee: Guizhou Honglin Machinery Co Ltd
Current assignee: Guizhou Honglin Machinery Co Ltd
Priority date: 2008-11-05
Filing date: 2008-11-05
Publication date: 2009-07-22
Anticipated expiration: 2018-11-05

Abstract

The utility model relates to a fuel gas injection valve of a fuel gas injection control system of a CNG engine, which belongs to a fuel gas injection valve, wherein a sealing gasket (14) and a valve seat (7) are sealed on an end surface, the sealing gasket and a keeper are integrated into an integrated body, two oil-free lubrication bearings (10) are arranged in the keeper, the valve seat is arranged on the right end of a valve body (8), and a gasket (13), a coil component (3) with an O-shaped ring (12), and an O-shaped ring (9) and a valve body which is pressed with the oil-free lubrication bearings and the valve seat are arranged in a coil cover (2). A keeper component (4) is arranged in the coil cover, a left end hole of the keeper component is equipped with a spring (11), a pole shoe (1) is connected with the left end of the coil cover through thread, the circumference where the valve seat and the valve body are matched is distributed with an air inlet (16), and an inner hole of the valve seat is an injection port (15). The fuel gas injection valve of the fuel gas injection control system of the CNG engine has simple structure, excellent manufacturability, simple assembly, strong anti-pollution capacity, convenient cleaning, reliable work and long service life, and is suitable for a fuel gas injection control system of a CNG engine.

Description

A kind of fuel gas injection valve of CNG engine gas jet control system

Technical field:

The utility model relates to fuel gas injection valve, particularly a kind of fuel gas injection valve of CNG engine gas jet control system.

Background technique:

The sealing configuration of general gas injection valve is steel ball and the sealing of valve seat endless belt rigidity, and this sealing configuration is very high to the requirement on machining accuracy of valve seat, and stain resistance is also bad.The structure that the assembly of employing armature and armature lever promotes steel ball is very high to the requirement on machining accuracy of armature and armature lever, and because armature component is the moving element of fuel gas injection valve, in proper functioning, be in the dither state, the push rod fracture in use take place easily cause the fuel gas injection valve member to be imitated.

In the structure of general gas injection valve, armature pipe directly contacts with armature, and is flexible in order to make armature motion, very high to the requirement on machining accuracy of armature and armature pipe, and especially the endoporus difficulty of processing of armature pipe is big, and the cost of production height is unfavorable for producing in enormous quantities.

In the structure of ordinary injectors, the stroke of fuel gas injection valve is determined by apolegamy valve seat and spring seat assembly, and in a single day part is pressed into valve body, stroke is just non-adjustable, requirement on machining accuracy to part is very high, be difficult to guarantee the accurate adjustment and the conforming control of flow of stroke, cause the fluctuation of speed of gas engine.

Because domestic source of the gas is impure more, easily contaminated during injection valve work, influence the sealing of valve, in the structure of ordinary injectors, armature component, steel ball and valve seat are non-removable, clean very difficultly, have influenced working life of injection valve greatly.

Summary of the invention:

The purpose of this utility model is to provide a kind of fuel gas injection valve of CNG engine gas jet control system, this injection valve component good manufacturability, assembling is simple, stain resistance strong, be convenient to clean, and makes injection valve reach the purpose of reliable operation, simple in structure and long service life.

Formation of the present utility model: by pole shoe, coil housing, coil block, armature component, O shape circle, valve seat, valve body, Nonlubricated bearing, spring, pad and sealing gasket are formed, sealing gasket 14 is end face seal with valve seat 7, sealing gasket and armature become one, in armature pipe, install two Nonlubricated bearings 10 additional, valve seat 7 is contained in valve body 8 right-hand members, pad 13, the coil block 3 that has O shape circle 12, O shape circle 9 and press Nonlubricated bearing 10, the valve body 8 of valve seat 7 is packed in the coil housing 2 and is closed up, armature component 4 is contained in the coil housing 2, armature component has spring 11 in the 4 left end holes, and pole shoe 1 is connected with coil housing 2 left ends by screw thread.

Distribution suction port 16 on valve seat 7 and circumference that valve body 8 cooperates, the endoporus of valve seat 7 is a jetburner 15.

Sealing gasket 14 is made for nonmetallic material.

Compared with prior art, function of the present utility model is to distribute, measure, timely inject to gaseous fuel in the air stream that is entering in the cylinder, thereby the assurance gaseous fuel mixes and practicable fuel layering spray combustion with air stream, this fuel gas injection valve is made up of component such as valve body, armature component, coil block, plate boots, valve seat, spring, coil housings, is two to close the Electromagnetic Drive end face seal structure usually.Its characteristics are to adopt the sealing gasket and the valve seat end face seal of nonmetallic material, the noise when reducing injection valve work, and sealing gasket and armature become one, its good manufacturability, cost of production is low, and reliable operation is fit to batch process; By in armature pipe, installing two Nonlubricated bearings additional, improved the manufacturability of armature, armature pipe, the frictional force when reducing injection valve work between armature and armature pipe has shortened response time of injection valve; Valve body and valve seat adopt press fit, and the flow of injection valve guarantees by the gap of online regulating valve seat and armature component, thus the flow conformity of raising injection valve; Pole shoe and coil housing are convenient to dismantle, clean pole shoe, the armature component of injection valve for being threaded, and have prolonged the working life of injection valve.

Description of drawings:

Fig. 1 is the utility model structural representation, and Fig. 2 is the A-A sectional view of Fig. 1.

1. pole shoes among the figure, 2. coil housing, 3. coil block, 4. armature component, 5.O shape circle, 6.O shape circle, 7. valve seat, 8. valve body, 9.O shape circle, 10. Nonlubricated bearing, 11. springs, 12.O shape circle, 13. pads, 14. sealing gaskets, 15. jetburners, 16. suction ports.

Embodiment:

As shown in Figure 1 and Figure 2, sealing gasket 14 is end face seal with valve seat 7, sealing gasket and armature become one, in armature pipe, install two Nonlubricated bearings 10 additional, valve seat 7 is pressed into from valve body 8 left ends, pad 13, the coil block 3 that has O shape circle 12, O shape circle 9 and the valve body 8 that presses Nonlubricated bearing 10, valve seat 7 are packed in the coil housing 2 and are closed up, armature component 4 is put into from the left end of coil housing 2, armature component has spring 11 in the 4 left end holes, smears locking thread glue and be screwed to coil housing 2 left ends on the screw thread of pole shoe 1.

When injection valve cut off the power supply, the elastic force that spring 11 produces pushed up the end face of valve seat 7 with the sealing gasket of armature component 4, and injection valve is in closed condition; When injection valve was switched on, coil block 3 produced electromagnetic force, and electromagnetic force drives the elastic force that armature component 4 overcomes return spring 11, and armature component 4 is drawn onto limit on the left, and valve is opened, and combustion gas this moment sprays into motor by valve seat 7.Guarantee the flow of valve by the gap of online regulating valve seat and armature component.

Claims

1. the fuel gas injection valve of a CNG engine gas jet control system, by pole shoe, coil housing, coil block, armature component, O shape circle, valve seat, valve body, Nonlubricated bearing, spring, pad and sealing gasket are formed, it is characterized in that: sealing gasket (14) is end face seal with valve seat (7), sealing gasket and armature become one, in armature pipe, install two Nonlubricated bearings (10) additional, valve seat (7) is contained in valve body (8) right-hand member, pad (13), the coil block (3) that has O shape circle (12), O shape is enclosed (9) and is pressed Nonlubricated bearing (10), the valve body (8) of valve seat (7) is packed into, and coil housing (2) is interior also to close up, armature component (4) is contained in the coil housing (2), armature component (4) has spring (11) in the left end hole, and pole shoe (1) is connected with coil housing (2) left end by screw thread.

2. the fuel gas injection valve of a kind of CNG engine gas jet control system according to claim 1 is characterized in that: the suction port (16) that distributes on valve seat (7) and circumference that valve body (8) cooperates, the endoporus of valve seat (7) is jetburner (15).

3. the fuel gas injection valve of a kind of CNG engine gas jet control system according to claim 1 is characterized in that: sealing gasket (14) is made for nonmetallic material.