阅读说明：本技术 阀 (Valve with a valve body ) 是由 R·博南诺 于 2018-12-17 设计创作，主要内容包括：本发明涉及一种阀,包括壳体和布置在壳体中的螺线管,其中,螺线管包括线圈、衔铁、上部定子和下部定子,定子这样设计,使得当磁力在定子之间起作用时衔铁轴向地运动,所述阀还包括与衔铁固定地连接的杆、与杆连接的罐形的活塞、在磁力消失时使活塞背离螺线管运动的弹簧以及布置在壳体上以便为螺线管供给电能的插口。在螺线管(5)中布置有保护套筒(21),该保护套筒使活塞(8)的区域与插口的区域这样分离,使得没有介质能从活塞(8)的区域到达插口的区域中。(The invention relates to a valve comprising a housing and a solenoid arranged in the housing, wherein the solenoid comprises a coil, an armature, an upper stator and a lower stator, the stator being designed such that the armature moves axially when a magnetic force acts between the stators, the valve further comprising a rod fixedly connected to the armature, a pot-shaped piston connected to the rod, a spring moving the piston away from the solenoid when the magnetic force is removed, and a socket arranged on the housing for supplying the solenoid with electrical energy. A protective sleeve (21) is arranged in the solenoid (5), which sleeve separates a region of the piston (8) from a region of the socket in such a way that no medium can pass from the region of the piston (8) into the region of the socket.)

1. A valve comprising a housing and a solenoid arranged in the housing, wherein the solenoid comprises a coil, an armature, an upper stator and a lower stator, the stator being designed such that the armature moves axially when a magnetic force acts between the stators, the valve further comprising a rod fixedly connected to the armature, a pot-shaped piston connected to the rod, a spring moving the piston away from the solenoid when the magnetic force is removed, and a socket arranged on the housing for supplying electrical energy to the solenoid,

it is characterized in that the preparation method is characterized in that,

a protective sleeve (21) is arranged in the solenoid (5), which sleeve separates a region of the piston (8) from a region of the socket in such a way that no medium can pass from the region of the piston (8) into the region of the socket.

2. Valve according to claim 1, characterized in that the protective sleeve (21) is made of stainless steel.

3. Valve according to claim 2, characterized in that the protective sleeve (21) is made of chrome nickel steel.

4. Valve according to at least one of the preceding claims, characterized in that the protective sleeve (21) has a wall thickness of 0.1 to 0.5mm, preferably 0.2 to 0.4mm, in particular 0.3 mm.

5. Valve according to at least one of the preceding claims, characterized in that the protective sleeve (21) has a coating made of rubber, the thickness of the coating preferably being 0.5mm to 1mm, in particular 0.7 mm.

6. Valve according to at least one of the preceding claims, characterized in that a protective sleeve (21) is arranged between the coil (6) and the lower stator (17).

7. Valve according to claim 5, characterized in that the protective sleeve (21) has a flange (23) which abuts against the side of the coil (6) facing the piston (8).

Technical Field

The invention relates to a valve comprising a housing and a solenoid arranged in the housing, wherein the solenoid comprises a coil, an armature, an upper stator and a lower stator, the stator being designed such that the armature moves axially when a magnetic force acts between the stators, the valve further comprising a rod fixedly connected to the armature, a pot-shaped piston connected to the rod, a spring moving the piston away from the solenoid when the magnetic force is removed, and a socket arranged on the housing for supplying the solenoid with electrical energy.

Background

Such valves are primarily used as air-switching valves in turbochargers in motor vehicles in order to open a bypass to the intake side during freewheeling and are therefore known. In order to prevent too violent braking of the turbocharger, but also to ensure rapid starting, rapid opening and closing of the valves is an important prerequisite. Particularly when closing, it is important that immediate closing is achieved by the piston being placed on the valve seat. The valve seat is formed by the housing of the turbocharger to which the valve is flanged. In this case, the axially displaceable piston is sealed off from the housing. The piston has an opening so that the medium present in the bypass line can enter the interior of the valve. This pressure equalization is used to open and close the valve. The disadvantage here is that the medium contains aggressive components, which likewise penetrate into the interior of the valve. In this case, there is the possibility that these components can reach all the way into the region of the socket and can accumulate on the contacts. This in turn can lead to error messages in the controller that operates the solenoid.

Disclosure of Invention

It is therefore an object of the present invention to provide a valve which operates stably and reliably over a long period of time. Furthermore, the valve should be simple and cost-effective to construct.

The object is achieved in that a protective sleeve is arranged in the solenoid, which sleeve separates a region of the piston from a region of the socket in such a way that no medium can pass from the region of the piston into the region of the socket. This arrangement of the protective sleeve is a particularly simple measure for separating critical regions of the piston from other regions. Although less expensive, it provides reliable protection against aggressive components of the medium flowing in the bypass duct. It is thus prevented in an effective manner that aggressive components may approach the electrical contacts. The protective housing can also be produced simply and the installation of the protective housing requires only a few additional work steps.

In order to separate the two regions, it is advantageous if the protective sleeve is made of a durable plastic. Due to the forces and movements that act in the solenoid, the plastic must have a certain wall thickness. According to a further embodiment, it has proven advantageous if the protective sleeve is made of stainless steel. In addition to excellent protective properties, stainless steel has sufficient stability to form a protective sleeve with a small wall thickness. It has therefore proven advantageous for the protective sleeve to be designed with a wall thickness of 0.1mm to 0.5mm, preferably 0.2mm to 0.4mm, in particular 0.3 mm. The advantage is that the solenoid need only be slightly modified for use of such a protective sleeve. No costly redesign of the valve is required and existing valves can be retrofitted with little cost.

A cost-effective embodiment consists in that the protective sleeve is made of chrome-nickel steel.

According to a further embodiment, the protective sleeve has a coating made of rubber, the thickness of the coating preferably being 0.5mm to 1mm, in particular 0.7 mm. This has the advantage that the sleeve does not come into direct contact with other metal parts, at least in the region of the coating. Furthermore, the sealing is further improved by the coating.

According to a further advantageous embodiment, a secure protection of the component to be protected is thereby achieved, i.e. the protective sleeve is arranged between the coil and the lower stator. With this arrangement a separation between the area of the piston and the area of the solenoid is achieved. Thus, the area in which the aggressive components occur is limited to a minimum.

A safe and reliable arrangement of the protective sleeve in the event of a safety seal is achieved if the protective sleeve is pressed onto the lower stator. Thereby eliminating additional fasteners. The press-fit ensures that the protective sleeve remains in its installed position even in the event of a strong force acting on the valve from the outside.

In order to separate the region of the piston from the other regions of the valve in a sealing manner, it has proven advantageous if the protective sleeve is designed with a collar which rests against the side of the coil facing the piston.

Drawings

The present invention is described in detail in one embodiment. Shown in the drawings

Figure 1 shows a cross-sectional view of a valve according to the prior art,

FIG. 2 shows a cross-sectional view of a valve according to the invention, an

Fig. 3 shows an enlarged view of the protective sleeve.

Detailed Description

Fig. 1 shows a valve comprising a housing 1. Furthermore, the housing 1 has an integrally formed flange 3, by means of which the housing 1 is flanged to a turbocharger, not shown, in the region of the bypass line. The electrical contact of the solenoid 5, which is arranged in the housing 1, is achieved via the socket 2. The solenoid 5 has a coil 6 which acts on a metal rod 7. The metal rod 7 is connected to a cup-shaped piston 8, which has a sealing surface 10 on the circumference of its lower part 9, which sealing surface interacts with a valve seat, not shown. Here, the spring 7a urges the piston 8 toward the valve seat. The housing 1 also has a cylindrical section 11 which extends in the direction of the piston 8. A cylindrical bushing (Zylinderbuchse)12 connected to the housing surrounds the cylindrical section 11. The cylindrical liner 12 has a radially inward flange 13 on which a seal 14 is placed. The seal 14 seals the piston 8 in this case against the housing 1. An opening 15 in the piston 8 enables pressure equalization in the valve. But thereby also aggressive components of the exhaust gas enter the interior of the valve. The solenoid 5 includes an upper stator 16 and a lower stator 17. The two stators each have a central recess 19, 18. In the unenergized state of the solenoid 5, the armature 20, which is fixedly connected to the metal rod, is located in the recess 18 of the lower stator 17. When the solenoid 5 is energized, the armature 20 and the metal rod 7 with the piston 8 are pulled upwards with the armature. In this case, the armature 20 enters the recess 19 of the upper stator 16.

In fig. 2, 3 a valve and a protective sleeve 21 according to the invention are shown. The valve has a protective sleeve 21 made of chrome-nickel steel with a wall thickness of 0.3 mm. The protective sleeve has a cylindrical section 22 which merges at the lower end into a flange 23. The protective sleeve 21 rests with its cylindrical section 22 on the inner side of the coil 6, while the collar 23 rests on the side of the coil 6 facing the piston 8. Here, a rubber coating 24 on the protective sleeve 21 is used to improve the sealing.