WO2015169482A1

WO2015169482A1 - Valve arrangement

Info

Publication number: WO2015169482A1
Application number: PCT/EP2015/055021
Authority: WO
Inventors: Siamend Flo; Frank Nitsche; Jurij ARTAMONOV; Sevil AKGUEL; Lena Maren BAESSLER; Thorsten Allgeier; Andreas PLISCH; Ferdinand Huemmer
Original assignee: Robert Bosch Gmbh
Priority date: 2014-05-08
Filing date: 2015-03-11
Publication date: 2015-11-12
Also published as: CN106461105B; JP6373488B2; JP2017516044A; CN106461105A; DE102014208639A1

Abstract

The present invention concerns a valve arrangement comprising an outlet valve (2), an inlet valve (3) and a valve support (4) with a passageway, the outlet valve (2) being arranged on the valve support (4). According to the invention, the outlet valve (2) comprises a first diaphragm spring (20).

Description

Description title

Valve arrangement prior art

The present invention relates to a valve assembly which is e.g. can be used in a fuel pump for a vehicle, or a

Fuel pump comprising such a valve assembly.

Such a valve arrangement or such a fuel pump are known for example from GB 2478876 B. This includes the

A fuel pump in the form of a magnetic piston pump, a valve assembly having an inlet valve, an outlet valve and a valve carrier having a through hole, wherein the outlet valve is arranged on the valve carrier. Furthermore, the outlet valve is a dome valve with a

Resetting element formed and assembled accordingly from a variety of components. This leads to that on the one hand the

Valve arrangement occupies a large amount of space and on the other hand, more possibilities for error e.g. during assembly of the valve assembly may occur in the fuel pump. As a result, significant construction, installation and maintenance costs can be caused.

Disclosure of the invention

The valve assembly according to the invention with the features of claim 1 has the advantage over that a space and a

Cost reduction can be made possible. Furthermore, the valve assembly according to the invention may have a higher dynamics due to their construction. This is inventively achieved in that the Kalottenventil the

Fuel pump according to the prior art is replaced by a diaphragm spring. Thus, a flat construction of the exhaust valve or the Fuel pump can be enabled, which can lead to significant space savings. Furthermore, potential vibrations due to the low mass of the exhaust valve according to the invention can be reduced. In addition, the exhaust valve according to the invention has an inherent elasticity which is suitable for returning the exhaust valve to an initial position.

Thus, can be dispensed with an additional return element for the exhaust valve. Due to the compact and simple construction of the exhaust valve according to the invention, the manufacturing, assembly and maintenance costs can be significantly reduced. Here, the valve arrangement according to the invention comprises an outlet valve, an inlet valve, and a valve carrier with a

Through opening, wherein the outlet valve is arranged on the valve carrier. According to the invention, the outlet valve comprises a first diaphragm spring 20.

The dependent claims show preferred developments of the invention.

Preferably, the inlet valve may comprise a second diaphragm spring 30. Thus, a more compact design is possible. In addition, manufacturing and assembly errors can be reduced in the valve assembly according to the invention.

More preferably, the inlet valve and the outlet valve can be arranged on a common valve carrier. By arranging both valves on a common valve carrier, the size of the entire

Valve arrangement are significantly reduced, which can be dispensed with an additional valve carrier for the inlet valve. This leads to a space and cost savings. Furthermore, the valve assembly serves as a pre-assembly, which can be installed or replaced in a simple and error-free manner in a fuel pump. Further preferably, the outlet valve and / or the inlet valve can by means of a welded joint and / or a bond connection and / or a crimp connection and / or a clamp connection and / or a caulking and / or a positive connection at

Be arranged valve carrier. Thus, the mounting of the intake valve and / or the exhaust valve to the existing mounting devices and the respective requirements can be adapted depending on the application. For example, through a welded joint or a bond connection weight and space can be saved.

In order to avoid potential problems with respect to the sealing of the valve arrangement, the valve carrier may preferably be integrally formed. Thus, further assembly errors, which could occur in the case of a multi-part valve carrier, can be avoided.

Alternatively, the valve carrier may be designed in several parts, in particular exactly in two parts or in particular in exactly three parts. This can vary depending on

Application to the existing manufacturing or assembly procedures, the structure of the valve carrier can be adjusted. A multi-part construction of the valve carrier also offers the advantage that the corresponding parts can be replaced individually. In particular, the valve carrier may be formed in two parts or in three parts. Thus, in multi-part valve carriers an optimal solution can be achieved, which is both a relatively short

Assembly error chain as well as a certain flexibility in terms of production offers. In this case, the valve carrier may further comprise a positioning aid. Thus, it can be ensured that the parts of the valve carrier are positioned correctly to each other. The positioning aid can also be the right one

Positioning of the valve assembly can be used in a fuel pump. Thus, a proper mounting of the valve assembly or a secure operation of the fuel pump can be ensured. The positioning aid includes e.g. one or more recesses and / or one or more projections and / or by means of a pin interconnected holes.

It is also advantageous if the parts of the valve carrier by means of a

Welded joint and / or an adhesive bond and / or a

Crimping and / or a press-in connection and / or a clamping connection and / or a caulking and / or a positive connection are each connected to each other. As a result, the sealing of the multi-part valve carrier can be ensured. This has the consequence that no leaks can occur. Thus, the required

Flow rate can be ensured for example in a fuel pump. According to an advantageous embodiment of the valve arrangement according to the invention, the valve carrier may comprise at least one stamped part. By using a punching process, the valve carrier can be manufactured cost effectively and quickly.

In this case, the valve carrier may preferably comprise exclusively punched parts.

According to a further advantageous embodiment of the valve arrangement according to the invention, the valve carrier may comprise at least one deep-drawn part. Deep-drawn parts have high strength, accuracy and minimum weight. Further, deep drawing is particularly suitable for cylindrical parts with a single drawing step, whereby the production time and cost can be reduced. Thus, large production quantities of the

Valve assembly according to the invention are made quickly.

Particularly preferably, the valve carrier may comprise a stamped deep-drawn part. Thus, the benefits of punching and deep drawing can be combined.

Furthermore, the present invention relates to a fuel pump, which comprises a valve arrangement according to the invention. Thus, the installation space of the entire fuel pump can be reduced, which is particularly important e.g. on motorcycles or small household appliances.

Furthermore, the present invention relates to a vehicle, in particular motorcycle, which comprises a valve arrangement according to the invention or a fuel pump according to the invention.

Brief description of the drawings

Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings, wherein like or functionally identical parts are designated by the same reference numerals. In the drawing are:

Figures 1, 2 different views of a valve assembly according to a first embodiment of the present invention Invention, by means of which the functional principle of the valve arrangement according to the invention is described,

FIGS. 3, 4, 5 show different views of a valve arrangement according to a second exemplary embodiment of the present invention,

FIGS. 6, 7, 8 show different views of a valve arrangement according to a third exemplary embodiment of the present invention,

FIGS. 9, 10, 11, 12 show different views of a valve arrangement according to a fourth exemplary embodiment of the present invention,

Figures 13, 14 different views according to a fifth

Embodiment of the present invention

FIGS. 15, 16 show different views of a valve arrangement according to a sixth exemplary embodiment of the present invention,

FIG. 17 is a sectional view of a valve assembly according to a seventh embodiment of the present invention;

FIGS. 18, 19 show different views of a valve arrangement according to an eighth embodiment of the present invention,

FIGS. 20, 21 show different views of a valve arrangement according to a ninth embodiment of the present invention,

FIGS. 22, 23 show different views of a valve arrangement according to a tenth exemplary embodiment of the present invention, Figures 24, 25 are different views of a valve assembly according to an eleventh embodiment of the present invention, and

Figures 26, 27 are different views of a valve assembly according to a twelfth embodiment of the present invention.

Embodiments of the invention

Hereinafter, with reference to Figures 1 and 2 a

Valve assembly 1 according to a first preferred embodiment of the present invention described in detail.

FIG. 1 shows a top view of a valve arrangement 1 according to the invention. Figure 2 shows a sectional view of the valve assembly 1 of Figure 1 from the left, wherein additionally arranged in a cylinder 6 piston 7 with a

Return element 8, and an outlet 10 are shown schematically in section to explain the operation of the valve assembly 1.

As can be seen from FIG. 2 and partly FIG. 1, the valve arrangement 1 has an outlet valve 2, an inlet valve 3 and a valve carrier 4 with a passage opening 40. According to the invention, the outlet valve 2 comprises a first diaphragm spring 20.

The first diaphragm spring 20, which is to be better in FIG. 1, has a first inner sealing part 21, a first outer supporting part 22 and three first spring arms 23. The first sealing member 21 is circular and the first one

Support member 32 is annular. The spring arms 23 connect the inner first sealing part 21 with the first outer support part 22, wherein the first spring arms 23 extend substantially arcuately in the circumferential direction. Furthermore, the three first spring arms 23 are distributed uniformly in the circumferential direction, so that the spring arms 23 no overlap areas in

Have circumferential direction to each other. The first sealing part 21 and the first supporting part 22 are arranged concentrically with each other and dimensioned such that a first gap 24 between the first sealing part 21 and the first Supporting part 22 is formed, which is divided by the first spring arms 23 into three first gap regions 24a, 24b, 24c.

Furthermore, the inlet valve 3 comprises a second diaphragm spring 30 whose shape is similar to the shape of the first diaphragm spring 20. Accordingly, the second diaphragm spring 30 has a second inner seal member 31, a second outer support member 32, and three second spring arms 33. The second sealing part 31 and the second supporting part 32 are annular. Furthermore, the first diaphragm spring 20 and the second diaphragm spring 30 are each arranged on the valve carrier 4 by means of a welded connection 58. The arrangement of the first diaphragm spring 20 and the second diaphragm spring 30 on a common valve carrier, the size of the entire valve assembly 1 can be reduced.

The valve carrier 4, which is substantially cylindrical, is in this

Embodiment formed in one piece. In addition to the passage opening 40, the valve carrier 4 also has an intake opening 41. The mode of operation of the valve arrangement 1 according to the invention will be described in detail below with reference to FIG.

When the piston 7 is moved in a first direction R1 via an actuator, which is not shown in more detail, fuel is sucked in through the suction opening 41 radially into a delivery chamber 9 (arrows A) by the second inner sealing part 31 being lifted off the valve carrier 4 and the suction port 41 releases.

When the piston 7 is moved by means of the return element 7, which is designed as a helical spring, in a second direction R2, opposite to the first direction R1, pressure is built up in the delivery chamber 9. From a certain pressure level opens the inlet valve 3, wherein the second inner sealing member 31 is lifted from the valve carrier and the passage opening 40 releases. Thus, the fuel located in the delivery chamber 8 on the

Passage opening 40 and the first gap 24 or the first gap regions 24a, 24b, 24c pass into the outlet 10 and are further promoted (arrows B).

Thus, a simple and space-reduced construction of the valve assembly 1 can be achieved. Hereinafter, with reference to Figures 3 to 5 a

Valve assembly 1 according to a second preferred embodiment of the present invention described. Since the basic structure and the operation of the valve assembly 1 are similar in this and in the following embodiments three to twelve, only the differences are shown here.

This embodiment differs from the first embodiment in that the valve carrier 4 is formed in three parts. In particular, the valve carrier 4 comprises a first cylindrical part 43, a second annular part 44 and a third disc-shaped part 45 which, to ensure the sealing of the valve carrier 4, e.g. are each interconnected by means of a welded joint. The first part 43 and the third part 45 are formed as punching discs and the second part 44 as a deep-drawn part.

Furthermore, the first diaphragm spring 20 is arranged by means of a crimp connection 25 on the second part 44 of the valve carrier 4. In addition, depending on the application, the first diaphragm spring 20 may be e.g. be connected by means of a bond bond at the edge with the second part 44 of the valve carrier 4.

The second part 44 of the valve carrier 4 also has two suction openings 41 extending in the radial direction. Thus, the suction of fuel takes place radially (arrows A) and the conveying axially (arrows B).

Hereinafter, with reference to Figures 6 to 8 a

Valve arrangement 1 according to a third preferred embodiment of the present invention described.

In this embodiment, the valve carrier 4 is integrally formed.

In particular, the valve carrier 4 is formed as a metal powder injection molded part (MIM injection molded part). Thereby, the suction port 41 and the through hole 40 may be formed without post-processing in the valve carrier 4. Further, the first diaphragm spring 20 is secured by means of a caulking 26 on the valve carrier 4 by the valve carrier 4 three

Caulking projections 46 has. The third embodiment is different from the previous ones

Embodiments further characterized in that the outer support member 22 of the first diaphragm spring 20 and the exhaust valve 2 is formed as a serpentine extension of the spring arms 23.

Hereinafter, with reference to Figures 9 to 12 a

Valve arrangement 1 according to a fourth preferred embodiment of the present invention described. In the fourth embodiment, the valve carrier 4 is formed in three parts.

In particular, a first part 43, a second part 44 and a third part 45 of the valve carrier 4 are formed as punching discs. The first part 43 serves as an outlet valve seat for the outlet valve 2, wherein the third part 45 as

Inlet valve seat for the intake valve 3 is used. The second part 44 serves as

Spacer for flow guidance. Furthermore, the valve carrier 4 has two

Positioning aids 47, which are formed as recesses on the outer periphery of the parts 43, 44 and 44 and by means of which the first part 43, the second part 44 and the third part 45 are aligned with each other. Also conceivable as a positioning aid are bores in the first part 43, second part 44 and third part 45 of the valve carrier 4, wherein a pin is inserted into the bores to align the first part 43, the second part 44 and the third part 45 to each other. The first part 43, the second part 44 and the third part 45 are further e.g. via a welded connection, in particular a

Capacitor discharge welded joint, connected together.

Hereinafter, with reference to FIGS

Valve arrangement 1 according to a fifth preferred embodiment of the present invention described. In this embodiment, the valve carrier 4 is formed in two parts, wherein a first part 43 and a second part 44 are formed as punched deep-drawn parts in contrast to the punching discs of the previous embodiment.

Furthermore, the first part 43 and the second part 44 each have a protrusion 48, which is curved and assumes the function of the spacer of the previous embodiment. Thus, an alignment of the first part 43 and the second part 44 by means of a positioning aid is not necessary. The first part 43 serves as an exhaust valve seat for the exhaust valve 2 and the second part 44 as an inlet valve seat for the inlet valve 3. The first part 43 and the second part 44 are also, for example via a welding or

Bonded joint interconnected. The second part 44 also has two intake openings 41.

Hereinafter, with reference to Figs

Valve arrangement 1 according to a sixth preferred embodiment of the present invention described.

In this embodiment, the valve carrier 4 is also in two parts

educated. In this case, the valve carrier 4 has a first part 43 in the form of a rotary part and a second part 44 in the form of a stamped deep-drawn part. The first part 43 is at the same time the exhaust valve seat and partly also the

Inlet valve seat.

The second part 44 is substantially annular and has a projection 49, against which the first part 43 is pressed in the second part 44. Thus, the first part 43 and the second part 44 are connected to each other.

Hereinafter, a valve assembly 1 according to a seventh preferred embodiment of the present invention will be described with reference to FIG.

The valve carrier 4 is formed in two parts and rotationally symmetrical about an axis X-X. In particular, the valve carrier has a first part 43, which is a rotary part, and a second part 44, which is in the form of a hat-shaped one

Punching deep-drawn part is formed. Furthermore, the second part 44 has a first cylindrical opening 50 and surrounds the first part 43. Furthermore, the first part 43 is provided with a flange 51, to which the second part 44, e.g. is attached via a welded joint.

The first part 43 is simultaneously the exhaust valve seat for the exhaust valve 2 and also the intake valve seat for the intake valve 3. In the first part 43 of the

Valve carrier 4, a through hole 40 is further formed, which releases the exhaust valve 2 or closes. The second part 44 in turn has six suction openings 41, which are distributed uniformly on the outer circumference in the circumferential direction and a substantially square cross-section exhibit. Fuel can be sucked radially into the delivery chamber 9 via the intake openings 41 (arrows A).

Furthermore, the valve arrangement 1 according to this embodiment comprises a bell-shaped punched-deep-drawn part 52 which has a shoulder 53 and partially surrounds the second part 44. Via the shoulder 53, the outlet valve 2 is fixed between the valve carrier 4 or the second part 44 and the bell-shaped punched-deep-drawn part 52. Further, the exhaust valve 2 may be e.g. be connected via a welded joint with the second part 44 and / or the bell-shaped punched-Deep Drawing 52.

In addition, the bell-shaped punching depression 52 serves as a port for connecting a pressure line, which is not shown in detail, or as a pre-assembly for easy incorporation into an existing module, e.g. the housing of a fuel pump. Accordingly, the bell-shaped punched-deep drawing part 52 has a second cylindrical opening 54.

Hereinafter, referring to Figs

Valve assembly 1 according to an eighth preferred embodiment of the present invention described.

Compared to the previous embodiments of the valve assembly 1 according to the invention, in this embodiment, the valve carrier 4 has a cylindrical circumferential wall 55, in which a slot 56 in

Circumferential direction is formed. In the slot 56, the edge of the exhaust valve 2 is inserted and thus the exhaust valve 2 is fixed to the valve carrier 4 in a form-fitting manner.

In a ninth exemplary embodiment (FIGS. 20 and 21), the valve carrier 4 of the valve arrangement 1 according to the invention differs fundamentally from the fifth exemplary embodiment in that the first part 43 and the second part 44 each have an elevation 48, which is cylindrical rather than curved.

In a tenth embodiment (Figures 22 and 23), the valve carrier 4 of the valve assembly 1 according to the invention is formed in three parts and accordingly comprises a first part 43 and a third part 45, which Punching discs are, and a second part 44, which is formed as a punched deep-drawn part. Furthermore, the second part 44 has a suction opening 41. The exhaust valve 2 is clamped between the first part 43 and the second part. Furthermore, the valve assembly 1 is shown in a cylinder 6.

In an eleventh exemplary embodiment (FIGS. 24 and 25), the valve carrier 4 of the valve arrangement 1 according to the invention is designed in two parts. In particular, the valve carrier 4 has a first part 43 and a second part 44, which are formed as stamped-deep-drawn parts and connected to each other by means of a crimp connection 57, the crimp connection 57 being based on the shape of the first part 43 and the second part 44.

In a twelfth exemplary embodiment (FIGS. 26 and 27), the valve carrier 4 of the valve arrangement 1 according to the invention is likewise designed in two parts and has a first part 43 and a second part 44 in the form of punched disks. The second part 44 has an elevation 48, which is formed in two stages cylindrically in contrast to that of the ninth embodiment, and on which the first part 43 is arranged or e.g. is attached by means of a welded joint.

It should be noted that in the embodiments described above, the basic structure of the arrangement according to the invention is similar. Therefore, only the different features were described. It is further noted that the foregoing embodiments are for illustrative purposes only and not for the purpose of limiting the invention. In the context of the invention are various changes and

Modifications are possible without departing from the scope of the invention and its equivalents.

Thus, e.g. geometric characteristics of the valve carrier 4 or the first and second diaphragm spring 30 such. Width of the spring arms or the

Gap areas can be adjusted depending on the application.

It should also be noted that features of the embodiments discussed above can be combined as long as they are not mutually exclusive. The valve arrangement 1 according to the invention makes possible a compact and cost-effective construction, as a result of which the dynamics of the fuel pump can also be improved in different operating circumstances.

Claims

Valve assembly comprising:

an outlet valve (2),

- An inlet valve (3), and

a valve carrier (4) having a passage opening (40),

- wherein the outlet valve (2) on the valve carrier (4) is arranged,

- characterized in that:

- The outlet valve (2) comprises a first diaphragm spring (20).

Valve arrangement according to claim 1, characterized in that the inlet valve (3) comprises a second diaphragm spring (30).

Valve arrangement according to one of the preceding claims, characterized in that the outlet valve (2) and the inlet valve (3) are arranged on a common valve carrier (4).

Valve arrangement according to one of the preceding claims, characterized in that the outlet valve (2) and / or the inlet valve (3) by means of a welded connection and / or a bond connection and / or a crimp connection and / or a clamp connection and / or a caulking connection and / or one

Form-fitting connection on the valve carrier (4) are arranged.

Valve arrangement according to one of the preceding claims, characterized in that the valve carrier (4) is integrally formed.

Valve arrangement according to one of claims 1 to 4, characterized

in that the valve carrier (4) is designed in several parts, in particular exactly in two parts or in particular exactly in three parts.

Valve arrangement according to claim 6, characterized in that the valve carrier (4) comprises a positioning aid (47).

8. Valve arrangement according to claim 6 or 7, characterized in that the parts (43, 44, 43, 44, 45) of the valve carrier (4) by means of a welded joint and / or a bond connection and / or a crimp connection and / or a press-fit connection and / or a clamping connection and / or a caulking and / or a positive connection are each connected to each other.

9. Valve arrangement according to one of claims 6 to 8, characterized

characterized in that the valve carrier (4) comprises at least one stamped part.

10. Valve arrangement according to one of claims 6 to 9, characterized

in that the valve carrier (4) comprises exclusively punched parts.

1 1. Valve arrangement according to one of claims 6 to 9, characterized

characterized in that the valve carrier (4) comprises at least one deep-drawn part. 12. Valve arrangement according to claim 1 1, characterized in that the

Valve carrier (4) comprises at least one stamped deep-drawn part.

13. A fuel pump, comprising a valve arrangement (1) according to one of the preceding claims.