阅读说明：本技术 泵装置以及至少局部密封泵装置的方法 (Pump device and method for at least partially sealing a pump device ) 是由 A·库尔梅 G·库纳特 H·古德斯-哈梅尼赫 M·施泰格 D·豪尔 于 2019-05-16 设计创作，主要内容包括：本发明涉及一种用于泵送液体的泵装置,包括液压壳体(2)、设于所述液压壳体(2)中的泵环载体(5)、沿径向(RR)设于所述泵环载体(5)与所述液压壳体(2)之间的弹性泵环(3)以及分离室销(4),其中为了在所述液压壳体(2)上产生至少局部的密封效果,所述泵环(3)可被所述分离室销(4)沿所述径向(RR)压抵所述液压壳体(2)的内壁面,且其中所述液压壳体(2)具有径向偏移段(6),形成在所述分离室销(4)上的或者与所述分离室销(4)配合作用的单独的偏移元件可沿着所述径向偏移段沿轴向(AR)引入,且借此使所述分离室销(4)和所述泵环(3)沿所述径向偏移。(The invention relates to a pump device for pumping a liquid, comprising a hydraulic housing (2), a pump ring carrier (5) arranged in the hydraulic housing (2), an elastic pump ring (3) arranged radially (RR) between the pump ring carrier (5) and the hydraulic housing (2), and a separation chamber pin (4), wherein the pump ring (3) can be pressed by the separation chamber pin (4) in the radial direction (RR) against the inner wall surface of the hydraulic housing (2) in order to produce an at least partial sealing effect on the hydraulic housing (2), and wherein the hydraulic housing (2) has a radial offset section (6) along which a separate offset element formed on the separator chamber pin (4) or co-acting with the separator chamber pin (4) can be introduced in the axial direction (AR), and whereby the separation chamber pin (4) and the pump ring (3) are offset in the radial direction.)

1. Pump device for pumping a liquid, comprising a hydraulic housing (2), a pump ring carrier (5) arranged in the hydraulic housing (2), an elastic pump ring (3) arranged radially (RR) between the pump ring carrier (5) and the hydraulic housing (2), and a separator chamber pin (4), wherein the pump ring (3) can be pressed by the separation chamber pin (4) in the radial direction (RR) against the inner wall surface of the hydraulic housing (2) in order to produce an at least partial sealing effect on the hydraulic housing (2), and wherein the hydraulic housing (2) has a radial offset section (6) along which a separate offset element formed on the separator chamber pin (4) or co-acting with the separator chamber pin (4) can be introduced in the axial direction (AR), and whereby the separation chamber pin (4) and the pump ring (3) are offset in the radial direction.

2. A pump arrangement according to claim 1, characterized in that the separation chamber pin (4) is displaceable in the radial direction (RR) in a state in which it extends completely over the pump ring (3) in the axial direction (AR) in order to press the pump ring (3) against the inner wall surface of the hydraulic housing (2) simultaneously over its entire effective axial length.

3. Pump arrangement according to claim 1 or 2, characterized in that the radially offset section (6) of the hydraulic housing (2) is constructed as a radial step.

4. Pump device according to any one of the preceding claims, characterized in that the offset element is integrally formed with the separation chamber pin (4).

5. Pump arrangement according to one of the preceding claims, characterized in that the radial outer insertion plane (EE) of the side face of the separation chamber pin (4) extends in the radial direction (RR) without overlap in relation to the pump ring (PE) plane of the pump ring (3) which is to be offset radially outwards when the separation chamber pin (4) is in the pre-loaded state.

6. Pump device according to the preceding claim, characterized in that said radial step and the offset element formed on said separation chamber pin (4) have corresponding slide-aid bevels (7, 8) by which said separation chamber pin (4) is slidable in said axial direction (AR) so as to produce simultaneously a radial offset of said separation chamber pin (4) and of said pump ring (3).

7. Pump arrangement according to any one of claims 1 to 4, characterized in that the hydraulic housing (2) forms a receptacle (9) for the separator pin (4) on the side axially opposite the radial offset section (6) relative to the pump ring carrier (5), wherein the receptacle (9) has an introduction ramp (10) which extends obliquely in the radial direction (RR) by means of which the separator pin (4) is slidable and at the same time is offset in the radial direction (RR).

8. Pump device according to any one of the preceding claims 1 to 3, further comprising at least one insert element (22) whose radial extension is greater than that of the radially offset section and which can be introduced into the radially offset section in the axial direction (AR) and in the process offset the separation chamber pin (4) and the pump ring (3) only in the radial direction (RR).

9. Pump arrangement according to the preceding claim, characterized in that the hydraulic housing (2) has two axially opposite, radially offset sections with respect to the pump ring carrier (5), and two insert elements (22), wherein one insert element (22) can be introduced in each of the radially offset sections in the axial direction (AR) and in the process the separation chamber pin (4) and the pump ring (3) are offset from the axially opposite sides only in the radial direction (RR).

10. Method of at least partially sealing a pump arrangement for pumping a liquid, the pump arrangement comprising a hydraulic housing (2), a pump ring carrier (5) arranged in the hydraulic housing (2), an elastic pump ring (3) arranged radially between the pump ring carrier (5) and the hydraulic housing (2), and a separation chamber pin (4), wherein in carrying out the method the separation chamber pin (4) is first positioned in a state in which it extends axially completely over the pump ring (3), and is subsequently deflected in the radial direction (RR), whereby the pump ring (3) is pressed against an inner wall surface (21) of the hydraulic housing (2) to produce an at least partial sealing effect.

11. Method according to the preceding claim, characterized in that the hydraulic housing (2) has a radial offset section along which a separate offset element formed on the separation chamber pin (4) or co-acting with the separation chamber pin (4) is introduced in the axial direction (AR) and by which the separation chamber pin (4) and the pump ring (3) are offset in the radial direction (RR).

12. Method according to any of the preceding claims 8-9, characterized in that the radially offset section of the hydraulic housing is constructed as a radial step, wherein the radial step and an offset element formed on the separation chamber pin (4) have corresponding slide-aid bevels (7, 8), by means of which the separation chamber pin (4) slides in the axial direction in order to simultaneously offset the separation chamber pin (4) and the pump ring (3) in the radial direction (RR).

13. Method according to any of the preceding claims 8-9, characterized in that the hydraulic housing (2) forms a receptacle for the separator pin (4) on the side axially opposite the radially offset section with respect to the pump ring carrier (5), wherein the receptacle (9) has an introduction ramp (10) extending obliquely in the radial direction (RR), and wherein the separator pin (4) slides in the axial direction (AR) via the obliquely extending introduction ramp (10) while being offset in the radial direction (RR).

14. Method according to any one of the preceding claims, characterized in that the pump device (1) has at least one insert element (22) whose radial extension is greater than that of the radially offset section and which is introduced into the radially offset section in the axial direction (AR) and in the process displaces the separation chamber pin (4) and the pump ring (3) only in the radial direction (RR).

15. Method according to any of the preceding claims, characterized in that the hydraulic housing (2) has two axially opposite radial offset sections with respect to the pump ring carrier (5) and two insert elements (22), wherein in each of the radial offset sections one insert element (22) is introduced in the axial direction (AR) and in the process the separation chamber pins (4) and the pump ring (3) are offset from the axially opposite sides only in the radial direction (RR).

Technical Field

The invention relates to a pump device and a method for sealing the pump device at least partially, in particular on an inner wall surface of a hydraulic housing, using a separating chamber pin.

Background

Various types of pump devices are well known in the art. For example, the publication WO2016/173800 a1 from the applicant discloses a corresponding pump device for pumping or conveying liquids, having a hydraulic housing, a pump ring carrier and a pump ring, which is offset by means of separating chamber pins, also referred to as "clamping elements", in order to seal off the pump chambers from one another or the suction side from the pressure side of the pump. The pump ring is also referred to in part in the industry as a "diaphragm". During installation, the separating chamber pin is pressed axially into the elastic pump ring and in the process displaces the pump ring with its free front edge both axially and radially, wherein the radial offset produces a sealing effect on the inner wall surface of the hydraulic housing. The problem here is that the axial insertion or displacement of the separator chamber pin also forces the pump ring axially, which may damage the pump ring or lead to inconsistent stress ratios inside the pump ring. This does not ensure tightness, or at least does not ensure tightness over the life of the pump device.

Disclosure of Invention

In view of the above, it is an object of the present invention to provide a pump arrangement that can seal a pump ring on a hydraulic housing and that can eliminate or at least reduce axial forces acting on the pump ring upon installation.

This object is achieved by the combination of features according to claim 1.

The invention provides a pump device for pumping liquid, comprising a hydraulic housing, a pump ring carrier arranged in the hydraulic housing, an elastic pump ring arranged between the pump ring carrier and the hydraulic housing along the radial direction, and a separation chamber pin. In order to produce an at least partial sealing effect on the hydraulic housing, the pump ring can be pressed radially against the inner wall surface of the hydraulic housing by the separating chamber pin in order to separate the pump chambers of the pump device from one another. The hydraulic housing has a radial offset section along which a separate offset element formed on or interacting with the separating chamber pin can be introduced axially and thereby radially offset the separating chamber pin and the pump ring in order to form a radial pressing of the elastic pump ring against the hydraulic housing.

By providing a radially offset section provided on the hydraulic housing and an offset element acting on the separation chamber pin, the separation chamber pin can first pass completely or substantially completely through the pump ring without exerting significant axial forces on the pump ring. The pump ring is pressed radially against the hydraulic housing, which can be brought about advantageously by a deflection element interacting with the radial deflection section after the separating chamber pin has extended axially over the pump ring. The invention avoids the axial force to which the pump ring is subjected during the previous insertion of the separator chamber pin, which axial force would cause undesired axial local movements of the pump ring.

In an advantageous embodiment variant, the offset element is formed integrally on the separating chamber pin, in particular on an axial edge section of the separating chamber pin, and, once interacting with the radial offset section, then offsets the separating chamber pin in the radial direction. This cooperation can be achieved, for example, by: the offset element is pushed axially onto the radial offset section and in the process displaces the separating chamber pin radially. Because of the integral molding, no additional parts are needed.

Embodiments of the pump apparatus are further characterized in that: when the separating chamber pin is in the preassembled state, the radially outer insertion plane of the side face of the separating chamber pin extends without overlapping in the radial direction with respect to the pump ring plane of the pump ring which is to be offset radially outward in the radial direction. In this way, the separation chamber pin can pass axially through the pump ring without contacting the pump ring or at least without exerting an axial force on the pump ring. The insertion plane and the pump ring plane may also coincide. The preloaded state is a state in which the separation chamber pin has been inserted into the elastomeric pump ring but has not yet applied radial pressure to the pump ring.

Furthermore, the following embodiments of the pump device are advantageous: the separator chamber pin can be radially offset in the state of being fully extended in the axial direction over the pump ring, in order to press the elastic pump ring against the inner wall surface of the hydraulic housing at the same time with its entire effective axial length. For this purpose, the separating chamber pin has a sufficient axial length such that it first penetrates the pump ring completely in the axial direction and only then is displaced in the radial direction as a whole. As such, no axial forces are applied to the pump ring during insertion of the separator chamber pin that would cause damage to the pump ring.

In an embodiment variant of the pump device, it is provided that: the radially offset section of the hydraulic housing is constructed as a radial step. The radial step is in particular arranged on an axial lead-in section of the hydraulic housing for the separator chamber pin, so that the separator chamber pin can interact with the radial step in an axially outer region (i.e. axially spaced from the pump ring) in order to bring about a radial offset of the separator chamber pin and the pump ring.

In a development, the pump device is characterized in that: the radial step and the offset element formed on the separating chamber pin have corresponding slide-aid bevels by means of which the separating chamber pin can be slid axially in order to simultaneously produce a radial offset of the separating chamber pin and the pump ring. Thus, the separator chamber pin can still be inserted into the pump ring, and the radial step and the slide-assist ramp of the biasing member provide a guide for the separator chamber pin that automatically biases the separator chamber pin radially when it is fully inserted into its final installed position.

Embodiments of the pump apparatus further provide: the hydraulic housing forms a receptacle for the separator chamber pin on the side axially opposite the radially offset section with respect to the pump ring carrier. The receptacle has an introduction ramp extending obliquely in the radial direction, by means of which the separator chamber pin is slidable and at the same time radially displaceable. The separator chamber pin can be offset radially by the inclination of the receptacle on the second axial side leading into the ramp and thus be offset over its entire axial length. The following embodiments are advantageous: the inclined lead-in ramp and the slide-aid ramp have the same angle, with respect to the axial extension of the separator chamber pin, so that the separator chamber pin can be offset radially to the same extent on both axial sides.

In an alternative variant, the pump device further comprises at least one insert element having a radial extension greater than the radial extension of the radially offset section. The at least one insert element can be introduced axially into the radially offset section and in the process cause the separating chamber pin and the pump ring to be offset only radially. The use of an insert element, although resulting in a larger part count, may allow the use of a conventional standardized separation chamber pin that is radially offset by the insert element. In which case the biasing member formed on the separation chamber pin may be discarded.

In a development of the pump device, the hydraulic housing has two axially opposite, radially offset sections and two insert elements relative to the pump ring carrier, wherein one insert element can be introduced into each radially offset section in the axial direction and in the process the separating chamber pins and the pump ring are offset only in the radial direction from the axially opposite sides. This solution with two insert elements will increase the number of parts further, however, the radial displacement of the separator chamber pins on both axial sides will enable the pump ring to be pressed radially evenly against the hydraulic housing.

The present disclosure also includes a method of at least partially sealing the aforementioned pump arrangement including a hydraulic housing and a drive shaft extending axially within the hydraulic housing, a pump ring carrier disposed radially between the hydraulic housing and the drive shaft, a resilient pump ring disposed radially between the pump ring carrier and the hydraulic housing, and a separator chamber pin. The method is carried out by first positioning the separator chamber pins to extend axially completely over the pump ring and then radially offsetting the separator chamber pins. Whereby the pump ring is pressed against or pressed against the inner wall surface of the hydraulic housing to produce an at least partial sealing effect.

An embodiment of the method provides: a separate deflection element formed on or interacting with the separating chamber pin is introduced axially along the radially offset section of the hydraulic housing and thereby deflects the separating chamber pin and the pump ring radially.

The method further comprises the following variants: the radial offset section, which is designed as a radial step, and the offset element, which is formed on the separating chamber pin, have corresponding slide-on ramps, by means of which the separating chamber pin slides axially in order to offset the separating chamber pin and the pump ring simultaneously in the radial direction.

In an embodiment variant in which the hydraulic housing forms a receptacle for the separating chamber pin on the side axially opposite the radial offset section relative to the pump ring carrier and has an insertion ramp running obliquely in the radial direction, the method provides for: the separator chamber pin slides axially through an obliquely extending lead-in ramp and is simultaneously offset radially. As a result, the pump ring is pressed against the inner wall surface of the hydraulic housing as a whole from the axially opposite sides thereof.

For a solution in which the pump device has at least one insert element with a radial extent that is greater than a radial extent of the radially offset section, a variant of implementation of the method proposes: the insert element is introduced axially into the radially offset section and in the process causes the separating chamber pin and the pump ring to be offset only radially.

The method further comprises the following embodiments: the hydraulic housing has two axially opposite, radially offset sections and two insert elements relative to the pump ring carrier, wherein one insert element is introduced into each radially offset section in the axial direction and in the process the separating chamber pins and the pump ring are offset only in the radial direction from the axially opposite sides.

Drawings

With regard to further advantageous developments of the invention, reference is made to the dependent claims, which are described in detail below with reference to the figures in conjunction with preferred embodiments of the invention. Wherein:

FIG. 1 is a side cross-sectional view of a portion of a conventional pump apparatus not provided by the present invention;

fig. 2a is a side sectional view of a part of a pump device in a first embodiment variant;

FIG. 2b is a side cross-sectional view of the device of FIG. 2a with the chamber pin partially installed;

fig. 3a is a side sectional view of a part of a pump device in a second embodiment variant;

FIG. 3b is a side cross-sectional view of the portion of FIG. 3a with the separator chamber pin installed;

FIG. 4 is a cross-sectional view A-A of FIGS. 2a and 3 a;

fig. 5 is a cross-sectional view B-B of fig. 2B and 3B.

Detailed Description

Like reference numerals are used to designate like elements throughout the several views.

Fig. 1 shows a side sectional view of a part of a conventional pump arrangement 100 with a hydraulic housing 101, a pump ring carrier 103 arranged in the hydraulic housing 101 and an elastic pump ring 102 arranged therebetween. The pump device 100 is not necessarily a conventional one, but is merely a problem to be solved by the present invention. When mounted, the separator chamber pin 104 is inserted axially into the pump ring 102 and is pressed with its axial free end against the pump ring 102 both axially and radially in order to press on the inner wall surface of the hydraulic housing 101, wherein the pump ring 102 will inevitably be damaged due to the axial force application.

Fig. 2a and 2b show a first embodiment variant of a part of the pump device 1 in a side sectional view, in which the radial direction RR is vertical and the axial direction AR is horizontal. For the sake of clarity, other components of the pump device 1, such as the drive motor or the drive shaft, are not shown in the figures. The main components of the pump device 1 comprise a hydraulic housing 2 consisting of several parts, a pump ring carrier 5, an elastic pump ring 3 arranged radially between the pump ring carrier 5 and the hydraulic housing 2, and a separator chamber pin 4. The separation chamber pin 4 is in fig. 2a in a pre-assembled state and in fig. 2b in a final assembled state. As shown, the hydraulic housing 2 is provided on the outside with a connection 20 for conveying liquid. The hydraulic housing 2 can also be partially replaced by a flange.

The hydraulic housing 2 has an insertion channel 12 for the separator chamber pin 4, on a first axial side of which a radially offset section 6 constructed as a radial step is provided, and on a second axial side of which a receptacle 9 for the separator chamber pin 4 is provided. The radial step of the radially offset section 6 on the hydraulic housing 2 forms a slide-on ramp 7, by means of which the separator chamber pin 4 can be offset radially. In the pre-assembly position according to fig. 2a, the radial outer insertion plane EE of the side of the separation chamber pin 4 is parallel to the pump ring plane PE of the pump ring 3 and is spaced a little distance therefrom in the radial direction, so that the separation chamber pin 4 can pass axially through the pump ring 3 until the state shown in fig. 2a is reached without an axial force being applied to the pump ring.

The separator chamber pin 4 is formed integrally with a deflection element in the form of a local thickening 14 at an axial end. The thickening 14 also engages with the rest of the separator chamber pin 4 via a slide-aid bevel 8, which corresponds in shape to the slide-aid bevel 7 of the radial step. As shown in fig. 2b, when the separation chamber pin 4 is inserted in the axial direction AR to its final assembly position as shown in fig. 2b, the separation chamber pin 4 is deflected radially outwards with a magnitude of the radial extension of the thickened portion 14 of the separation chamber pin 4 and at the same time presses the elastic pump ring 3 against the inner wall surface 21 of the hydraulic housing 2. In order to ensure that the separator chamber pins 4 are radially offset over their entire axial length, the receiving portion 9 has a lead-in ramp 10 which is angled in correspondence with the slide-aid ramp 7 of the hydraulic housing 2. To this end, the separating chamber pin 4 forms on its axial free end a conical taper 11, which in the embodiment shown corresponds in shape to the lead-in ramp 10. In fig. 2b, the chamber pin 4 is fully inserted into the receiving portion 9, and a seal is achieved between the pump ring 3 and the inner wall surface 21.

Fig. 3a and 3b show an alternative variant of a part of the pump device 1 in a sectional side view, wherein features common to fig. 2a and 2b are not repeated but are considered to be disclosed here. In contrast to the solution according to fig. 2a and 2b, the radially offset section 6 of the hydraulic housing 2 is rectangular and of identical design on two axially opposite sides of the pump ring carrier 5. In the pre-assembly position according to fig. 3a, the separation chamber pins 4 are positioned to have been fully extended axially over the pump ring 3. In the illustrated embodiment, the insertion plane EE coincides without a distance from the pump ring plane PE. In the radial offset sections 6 on both sides, an insert element 22 is inserted in each case in the axial direction, the radial extent of which insert element is greater than the radial extent of the radial offset sections 6. The insert elements 22 each have a bevel 23 on their edge section facing the separating chamber pin 4 in order to be able to be introduced better and in the process to deflect and press the separating chamber pin 4 and the elastic pump ring 3 only in the radial direction RR against the inner wall surface 21 of the hydraulic housing 2.

Fig. 4 and 5 show a sectional view a-a of fig. 2a and 3a and a sectional view B-B of fig. 2B and 3B, from which a radial offset of the separation chamber pin 4 can be seen, whereby the pump ring 3 is pressed against the inner wall surface 21 of the hydraulic housing 2. The hydraulic housing 2 is further provided with radial channels 24 for fluid connection with the pump chambers between the inner wall surface 21 of the housing 2 and the pump ring 3, wherein the pump ring 3 separates the two radial channels 24, seen in the circumferential direction.

Although not shown in the drawings, an alternative embodiment also includes combining the two embodiments according to fig. 2a and 2b and providing the solution according to fig. 3a and 3b on one axial side, comprising a rectangular radial offset section 6 and an insert element 22, and providing the solution according to fig. 2a and 2b on the opposite axial side, comprising an insert 9, wherein the separation chamber pin 4 is correspondingly shaped on both axial sides thereof according to the illustrated embodiment.