CN201043506Y

CN201043506Y - Cone valve type normally open structure for diesel engine mono-block pump system

Info

Publication number: CN201043506Y
Application number: CNU2007201229935U
Authority: CN
Inventors: 苗建中; 胡智军; 司徒亮; 胡霞
Original assignee: Guizhou Honglin Machinery Co Ltd
Current assignee: Guizhou Honglin Machinery Co Ltd
Priority date: 2007-06-01
Filing date: 2007-06-01
Publication date: 2008-04-02
Anticipated expiration: 2017-06-01

Abstract

The utility model discloses a cone valve type normally opened structure applied to the oil injection of the monoblock pump system of a diesel engine, which belongs to the fuel injection valve of the diesel engine. A coil component (2) is nested on and connected with a valve body (1) by a screw bolt (3), a keeper (7) is pressed into the tail of a valve rod (6), a blocking iron (8) blocks the keeper (7) which is fixed, the valve rod (6), the keeper (7) and the blocking iron (8) are mounted in the valve body (1), and a regulation spacer (5) and a spring (4) are mounted in the valve body (1) on the valve rod (6). The structure of the keeper of the utility model is a plate type structure, the travel is short, and the speed of response is high; the sealing structure between the valve rod and the valve body is a conical sealing surface, a sealing girdle is small, the guide part of the valve rod does not need to control oil, thus greatly increasing flexibility and the speed of response, the processing cost of the structure is low, the difficulty of processing technique is reduced, and the processing precision of parts is reduced.

Description

The normal opening structure of cone valve type that the oil spout of diesel engine unit-pump system is used

Technical field:

The utility model relates to the diesel engine fuel jetting valve, the normal opening structure of cone valve type that the oil spout of particularly a kind of diesel engine unit-pump system is used.

Background technique:

Diesel engine fuel jetting has characteristics such as high pressure, high frequency, pulsation, and its jet pressure reaches as high as 200MPa up to 60～150MPa, is the hundred times of gasoline injection pressure, even thousands of times.Because the working environment of oil sprayer is limit, and makes its solenoid valve must bear higher pressure, reaching the higher response time satisfies the control needs of system.

Existing monoblock pump all is a guiding valve sealing structure with the structure of high-speed electromagnetic valve, because the working pressure of solenoid valve is higher, therefore the motion of valve rod in valve body of solenoid valve must be flexibly, could guarantee the high-frequency work of solenoid valve, so just impel valve rod must carry out high-precision processing, not only will guarantee the sealing of solenoid valve, also will guarantee the flexibility of solenoid valve, cause the difficulty of processing of valve rod to strengthen like this, influence the reliability of solenoid valve work.

Summary of the invention:

The purpose of this utility model is to provide a kind of diesel engine unit-pump system cone valve type that oil spout is used normal opening structure, this structure processing cost is low, reduce the machining accuracy of processing technology difficulty and part, under the sealability that guarantees solenoid valve, improve the solenoid valve flexibility, make diesel engine monoblock pump ejecting system reach the purpose of reliable operation and the accurate control of emitted dose.

Formation of the present utility model: form by valve body, coil block, screw, spring, adjustment pad, valve rod, armature, buting iron and O type circle, coil block 2 is enclosed within on the valve body 1, connect by screw 3, armature 7 is pressed into the afterbody of valve rod 6, it is fixing to block armature 7 with buting iron 8, the combined mechanism of valve rod 6, armature 7, buting iron 8 is packed in the valve body 1, install in the valve body 1 on valve rod 6 and adjust pad 5 and spring 4, the inclined hole 9 on the valve body 1 is communicated with straight hole on the valve body 1.

Armature 7 is plank frame, and valve rod 6 guide structure diameters are little, and the oily conical surface of control is arranged on the valve rod.

Compared with the prior art, the utility model armature structure is a plank frame, stroke is short, speed of response is fast, the sealing configuration of valve rod and valve body is a conical surface seal, seal band is very little, and the guiding position of valve rod does not need control oil, has improved flexibility and speed of response so greatly, this structure processing cost is low, reduce the machining accuracy of processing technology difficulty and part, under the sealability that guarantees solenoid valve, improve the solenoid valve flexibility, diesel engine monoblock pump ejecting system reliable operation and emitted dose are accurately controlled, by the power on/off of coil block, make the nozzle of diesel engine carry out the high frequency fuel injection, guarantee the high pressure of diesel engine fuel oil.

Description of drawings:

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

1. valve bodies in the drawings, 2. coil block, 3. screw, 4. spring is 5. adjusted pad, 6. valve rod, 7. armature, 8. buting iron, 9. inclined hole.

Embodiment:

As shown in Figure 1 and Figure 2, coil block 2 is enclosed within on the valve body 1, and connects by screw 3, and armature 7 is pressed into the afterbody of valve rod 6, utilizing buting iron 8 to block armature 7 can not come off, and fix by welding, the combined mechanism of valve rod 6, armature 7, buting iron 8 is packed in the valve body 1, on valve rod 6, install in the valve body 1 and adjust pad 5 and spring 4, adjust the elastic force of spring 4 by adjusting pad 5, guarantee that under cold state, valve rod 6 is in the limit inferior position, is normally open.

This structure is that bi-bit bi-pass is often opened the cone valve sealing configuration, and when no electric circuit, valve rod 6 is in the limit inferior position under the effect of spring 4, and diesel engine fuel oil is passed in the inclined hole 9 of valve body 1 by the straight hole of valve body 1, enters the nozzle of monoblock pump then; When energising, coil block 2 produces suction to armature 7 under the effect of electric current, armature 7 drives the active force that valve rod 6 overcomes spring 4, moves upward, and the sealing cone of valve rod 6 is combined with the seal band of valve body 1, the fuel oil that stops diesel engine providing, and the nozzle of monoblock pump stops oil spout.

Claims

1. the normal opening structure of cone valve type used of diesel engine unit-pump system oil spout, by valve body, coil block, screw, spring, adjust pad, valve rod, armature, buting iron and O type circle are formed, it is characterized in that: coil block (2) is enclosed within on the valve body (1), connect by screw (3), armature (7) is pressed into the afterbody of valve rod (6), it is fixing to block armature (7) with buting iron (8), with valve rod (6), armature (7), the combined mechanism of buting iron (8) is packed in the valve body (1), install in the valve body (1) on valve rod (6) and adjust pad (5) and spring (4), the inclined hole (9) on the valve body (1) is communicated with straight hole on the valve body (1).

2. the normal opening structure of cone valve type that diesel engine unit-pump system according to claim 1 oil spout is used is characterized in that: armature (7) is plank frame, and valve rod (6) guide structure diameter is little, and the oily conical surface of control is arranged on the valve rod.