CN101038042A - Noise reduction and Wear-resistance magnetic valve - Google Patents

Abstract

A noise reduction abrasion resistant method of magnetic valve, characterized in that a damping cushion (3) and a insulating ring (4) are respectively appended between a iron core (1) and a yoke iron (2) and on cylindrical surface of the iron core (1). Noise and plastic deformation created by mutual collision between the magnetic valve iron core and the yoke iron almost disappeared by employing the damping cushion; vortex erosion and intermetallic collision and friction between the iron core and the metal inner sleeve do not occur any more by using the insulating ring.

Description

Noise reduction and Wear-resistance magnetic valve

Technical field

The present invention relates to the solenoid valve field, refer more particularly to the anti abrasive method of a kind of solenoid valve noise reduction.

Background technique:

When solenoid valve was worked, the moment impact force with the yoke adhesive unshakable in one's determination was very big, and this problem is more outstanding when being used in high-frequency operation for the solenoid valve that big coil electric power is arranged especially.Bump can produce very big noise, also can make simultaneously the end face generation plastic deformation that iron core is impacted and be clashed into burr, motion unshakable in one's determination is obstructed, iron core just is stuck when the most serious, the operating life that shows solenoid valve this moment stops (certainly, if the miscellaneous part of solenoid valve is still intact,, can also work on behind the burr of removal iron core) by repairing.

In addition, electromagnetic valve coil in the current break process of energising and outage can unshakable in one's determination inner, metal-coating is inner and overcoat and iron core between induce eddy current voltage.When this induced voltage is created between overcoat and the iron core, unshakable in one's determination simultaneously may be in contact with one another again with overcoat the time, the phenomenon that electric current is ablated will take place in the surface of iron core and overcoat.Electricity is ablated except that making generation rhegmalypt in surface unshakable in one's determination, the also extra resistance to motion that increases; Rhegmalypt makes the softer iron core wearing and tearing aggravation of quality again.At present, the solenoid valve of ordinary skill all exists these shortcomings.Chinese patent CN200410070561.5, CN200410032832.8, CN200410081689.1 etc. do not relate to the problems referred to above yet.Once occurred on the Domestic market holding on the upper side and had a narrow groove, the solenoid valve of embedded plastic insulation ring at cylinder unshakable in one's determination.This solenoid valve solved cylinder unshakable in one's determination on the upper side portion do not ablated and iron-free heart wear problems by electricity, but the lower end of cylinder unshakable in one's determination still exists electric current ablation and wear problems unshakable in one's determination.The vibration damping noise reduction problem of also unresolved iron core of this solenoid valve and yoke bump.

The objective of the invention is:

Design or finished product to general solenoid valve are transformed slightly, solve operating noise and end face of iron core is clashed into burr, cylinder unshakable in one's determination is ablated and problem such as mechanical wear, and reduce resistance to motion unshakable in one's determination, improve the operating life of solenoid valve dead electricity action response speed and prolongation general solenoid valve.

The object of the present invention is achieved like this:

The additional damping pad of end face that is hit mutually at the iron core and the yoke of solenoid valve; Respectively open an embedded dead ring of narrow annular groove (accompanying drawing 2) the upper and lower of garden unshakable in one's determination cylinder, or only open an embedded wide dead ring of wide groove the work cylinder of iron core is wrapped up (accompanying drawing 3).

Be illustrated below in conjunction with accompanying drawing:

Accompanying drawing 1 is a yoke assembly unshakable in one's determination without the general solenoid valve of transforming, and it mainly comprises iron core (1), yoke (2), guide rod (5), pressure spring (6), nonferromagnetic material overcoat (7) and coil (8) etc.

Accompanying drawing 2 is the solenoid valve yoke assemblies unshakable in one's determination after accompanying drawing 1 process is improved, and it has increased a damping pad (3) and 2 dead rings (4).This embodiment damping pad adopts polyamine fat synthetic rubber, also can adopt the shock-resistant antifatigue of other good springiness to be difficult for aging synthetic rubber, rubber or plastics, and thickness is for being about 2mm, and external diameter is with unshakable in one's determination identical, and internal diameter is identical with guide rod.The corresponding shortening of upper end length 2mm unshakable in one's determination is not changed with the effective travel that guarantees solenoid valve.Dead ring adopts tenacity nylon material, respectively opening a width at 2 positions up and down of iron core is the annular groove of 1mm for the 4mm degree of depth, the thickness of ring is 1.5mm, and the annular groove processus aboralis of packing into goes out surface unshakable in one's determination but also leaves gap about about 0.3mm to guarantee that iron core can unrestricted motion in overcoat with outer inner room.The requirement of dead ring material is the same with damping pad, and it is aging also to require the shock-resistant antifatigue of good springiness to be difficult for, and also should require wear resistance to reach factors such as easily manufactured well, also can adopt and the damping pad identical materials.

Accompanying drawing 3 is another kind of implementation methodss of dead ring, only opens a wide groove on the cylinder unshakable in one's determination, and a wide dead ring only is installed, and guarantees that unshakable in one's determination can directly not contacting with metal-coating in whole working stroke gets final product.Be provided with the solenoid valve of a narrow dead ring for some at an end of iron core, can have established a similar groove and dead ring again at the other end.

Behind the additional damping pad, erasure effect is obvious especially between iron core and the yoke, impacts the iron core that is caused mutually and is clashed into burr and stuck also existence hardly of problem, has increased the Acceptable life of solenoid valve greatly; Behind cylinder unshakable in one's determination additional one or 2 dead rings, unshakable in one's determination in whole working stroke no longer directly and the metal outer wall friction that collides, both eliminate noise, eliminated wearing and tearing, also eliminated producing the problem that eddy current is ablated between iron core and the overcoat, reduced resistance to motion simultaneously again.Inserting nonferromagnetic material between iron core and the yoke also makes the action after the solenoid valve dead electricity obviously accelerate.

Claims (5)

1, a kind of noise reduction and Wear-resistance magnetic valve is characterized in that end face and additional respectively damping pad of cylinder unshakable in one's determination and dead ring that iron core and yoke at solenoid valve are hit mutually.

2, method according to claim 1 is characterized in that its length unshakable in one's determination should be done corresponding reduction after adding damping pad between solenoid valve iron core and the yoke, is not changed with the effective travel that guarantees solenoid valve.

3, method according to claim 1, it is characterized in that at the appended dead ring that adds of solenoid valve cylinder unshakable in one's determination, can also can only open the dead ring that 1 wide annular groove is inlayed a broad respectively the opening 1 narrow annular groove respectively and be embedded in wherein of iron core by top with by the bottom; For on cylinder unshakable in one's determination top or the bottom have a groove and be inlaid with the solenoid valve of narrow dead ring, can also set up an identical annular groove in the another location and inlay a narrow dead ring again.

4, damping pad that is added between the method according to claim 1, the iron core that it is characterized in that solenoid valve and yoke and cylinder unshakable in one's determination be appended add the material of dead ring can be identical also can be inequality.

5, method according to claim 1 is characterized in that the material of damping pad and dead ring can adopt rubber, synthetic rubber or plastics.

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