CN221170035U

CN221170035U - Rotary pump

Info

Publication number: CN221170035U
Application number: CN202323287784.4U
Authority: CN
Inventors: 斯蒂芬·卡恩茨
Original assignee: Wilo SE
Current assignee: Wilo SE
Priority date: 2022-12-20
Filing date: 2023-12-04
Publication date: 2024-06-18
Anticipated expiration: 2033-12-04
Also published as: BE1031161A1; BE1031161B1; EP4390138A1

Abstract

The subject of the utility model is a rotary pump (1) having: the pump comprises a pump housing (2), a motor housing (3) which is arranged over the pump housing (2) and defines a longitudinal axis (5), and a plurality of fastening means (9), wherein the motor housing (3) has an annular fastening flange (6) at its end facing the pump housing (2), and the fastening flange (6) is fixed to the pump housing (2) in a fixed manner by the fastening means (9) which are arranged at a distance from one another.

Description

Rotary pump

Technical Field

The present utility model relates to a rotary pump having: the pump includes a pump housing, a motor housing sleeved on the pump housing and defining a longitudinal axis, and a plurality of fastening devices. The utility model also relates to a method for manufacturing a rotary pump in a step of fitting a motor housing over a pump housing.

Background

Rotary pumps are known from the prior art and are used for delivering fluid by rotational movement of an impeller provided in the pump housing of the rotary pump. The impeller is driven by a motor of the rotary pump by means of a rotary shaft. The motor is typically arranged in a motor housing which is fitted over the pump housing and is fastened in a stationary manner by means of four bolts arranged at 90 ° intervals. For connecting the motor, a terminal box and/or an electronics housing is usually provided, and a control device is arranged therein, wherein the terminal box and/or the electronics housing is fitted over the motor housing.

Although it is possible to adapt the orientation of the motor housing together with the terminal box and/or the electronics housing to different installation situations by means of bolts, only four orientations can be defined due to the 90 ° spacing of the bolts. Furthermore, in the installed state of the rotary pump, the motor housing together with the terminal box and/or the electronics housing cannot generally be rotated without evacuating the piping system connected to the rotary pump.

Disclosure of utility model

Based on this situation, the object of the present utility model is to provide a rotary pump, in particular a heating circulation pump, and a corresponding method for producing a rotary pump, in which the rotation of the motor housing can be achieved even without the pipe system fed by the rotary pump being emptied and/or in the installed state of the rotary pump.

The object of the utility model is achieved by a rotary pump. In particular, advantageous embodiments are provided.

This object is achieved by a rotary pump having a pump housing, a motor housing which defines a longitudinal axis and which is axially arranged on the pump housing in any rotational position, and a plurality of fastening means, wherein

The motor housing has an annular fastening flange at its end facing the pump housing, and

The fastening flange is fixed in a position-fixed manner at the pump housing by fastening means arranged spaced apart from one another.

An important aspect of the proposed solution is that the motor housing can be fixed at the pump housing in any rotational position. Thus, for example, during operation, the motor housing may be rotated relative to the pump housing without the need to empty the plumbing system associated with the rotary pump. According to the solutions known from the prior art, for example, a motor housing fastened with four bolts spaced apart by 90 °, the motor housing can only be fixed to the pump housing in four defined orientations and must be completely removed from the pump housing in order to be realigned. However, different installation situations often require that the motor housing be oriented relative to the pump housing, for example, because of an already existing laying line, not exactly in one of these four predefined orientations. In this regard, the proposed solution meets the long felt need for a flexible rotational arrangement of the motor housing and for facilitating manual installation by the assembler.

The practical advantages of the proposed solution are even more pronounced if the electronics housing and/or the junction box are mounted on the motor housing. Such electronics housings and/or terminal boxes are typically rigidly connected to the motor housing and extend generally orthogonal to the longitudinal axis of the motor housing in terms of their longitudinal extension. This means that, in particular in the aforementioned narrow installation environment of existing laying pipelines, the arrangement of the electronics housing and/or the junction box often does not allow for the ideal assembly of conventional rotary pumps. As a result of the rigid connection of the electronics housing and/or the terminal box to the motor housing, it is also possible with the proposed solution to rotate the electronics housing and/or the terminal box into a position suitable for assembly and to fix the motor housing together with the electronics housing and/or the terminal box in a position-fixed manner in this position.

Rotary pumps generally refer to fluid machines that utilize rotational motion and dynamic forces to deliver a primarily liquid. In addition to the tangential acceleration of the fluid (also called medium), the centrifugal force generated in the radial flow is used for the transport, so that the rotary pump is also called centrifugal pump. During normal operation of the rotary pump, the motor housing is preferably arranged above the pump housing and/or is connected to the pump housing in a stationary manner. The fluid preferably comprises water or other liquid medium, such as a glycol-water mixture. The rotary pump is preferably configured as a heating circulation pump.

The pump housing can be constructed as known from the prior art, for example with two opposite connection ends for laying a pipeline, wherein the normal of the connection ends can extend orthogonally to the longitudinal axis of the motor housing. The normals of the connection ends preferably extend identically, so that the pump housing is configured as a so-called in-line pump housing. Preferably, an impeller is provided in the pump housing, which impeller can be driven by means of a motor arranged in the motor housing. A motor shaft may be provided for the motor and impeller. The design of the motor, impeller and/or motor shaft can be carried out as known from the prior art.

The motor housing is preferably open at one side thereof which is sleeved on the pump housing. It is also possible that the motor housing is self-contained and that the motor shaft protrudes from the motor housing into the pump housing. "fixed in a fixed manner to the pump housing" means in particular: the motor housing is non-rotatable relative to the pump housing. "arbitrary rotational position" means in particular: the motor housing can be arranged on the pump housing in any rotational position relative to the pump housing and is fixed in position at the pump housing in this position.

Preferably, a seal is provided between the motor housing and the pump housing, in particular in order to be able to rotate the motor housing by pressure in the state in which the pipe system is full. The seal may be configured as an O-ring and/or be inserted into the motor housing and/or the pump housing, for example into a circumferential groove of the end of the motor housing facing the pump housing and/or into a surface of the pump housing corresponding thereto. The seal may also be fixedly connected to and/or formed at the motor housing and/or the pump housing. The seal may be cast and/or injection molded directly from a suitable material onto the motor housing and/or a corresponding housing portion of the pump housing. The motor housing and/or pump housing may be made of gray cast iron, plastic, and/or composite materials.

According to a preferred development, the fastening flange is embodied in the form of a disk. Preferably, the fastening flange extends radially away from the axially extending base body of the motor housing, in particular away from the outer surface of the motor housing. The motor housing preferably has a circular, in particular a perfect circular, inner diameter and/or an outer diameter. A quarter-round rounding may be provided as a transition between the outer surface and the radially extending fastening flange (as seen from the side). A radially inwardly extending recess may be incorporated into the rounded portion in the region of the fastening means in order to be able to facilitate the assembly of the fastening means. A radially outwardly extending thickening may also be provided in the rounding to improve the stability between the fastening flange and the base body of the motor housing.

According to a further preferred embodiment, the motor housing is embodied in the form of a pot with a radially extending opening and/or the fastening flange surrounds the opening and extends radially away from the opening. The fastening flange preferably has a completely circular outer circumference from a top view and/or the opening is configured completely circular. The end face opposite the opening of the motor housing may be closed or have a through-going portion for the connection line of the motor.

According to a further preferred embodiment, the fastening means are embodied as bolts, in particular cylinder head bolts, which are screwed into the pump housing in order to achieve a position fixing. According to a further preferred embodiment, the screw has a screw head, by means of which the fastening flange is held axially. The fastening means preferably clamp the fastening flange in the axial direction relative to the pump housing. The bolt may be configured with other edges such as flat top, hemispherical top, oblate spheroid, lens-shaped top, cylindrical edges, conical edges, etc. as bolt heads to axially secure the fastening flanges.

According to a further preferred development, the fastening means extend parallel to the longitudinal axis. According to a further preferred embodiment, there are 2, 4, 6, 8 or 10 fastening means which are arranged, in particular, at regular intervals relative to one another and/or in which the fastening means radially surround the fastening flange. It is also conceivable that the rectangular pump housing is provided with two fastening means on one of the four sides of the pump housing, respectively, in an axial plan view. Other fastening means are conceivable in addition to the above-described screw, which are designed in particular to be releasable for rotating the motor housing.

According to a further preferred development, an electronics housing and/or a terminal box is provided, which is arranged in a stationary manner on the motor housing, in particular on the end of the motor housing facing away from the pump housing. Control means and/or electronics may be provided in the electronics housing to control the motor. Terminals for connecting the motor are preferably provided in the terminal box. Such terminals may also be provided in the electronics housing. The electronics housing and/or the terminal box are preferably sealed from the motor housing, wherein a cable connection is expediently provided between the electronics housing and/or the terminal box and the motor housing. The electronics housing and/or the terminal box can in principle have any shape, and thus be configured, for example, as a pot and be arranged on an axial extension of the motor housing. The electronics housing and/or the terminal box can likewise have a square shape, which can extend, for example, with respect to its longitudinal extension, perpendicularly to the longitudinal axis of the motor housing.

According to a further preferred embodiment, the fastening means press the fastening flange axially against the pump housing. Preferably, the fastening means surrounds the fastening flange, in particular in the axial direction and/or at the radially outer edge of the fastening flange. The axial compression force may be applied by screwing bolts as fastening means into the pump housing.

According to a further preferred embodiment, the rotary pump has a fastening disk, wherein the fastening flange is arranged axially between the fastening disk and the pump housing and the fastening means fix the fastening disk to the pump housing in a positionally fixed manner. The axial pressing force applied by the fastening means can be better distributed by the fastening disc. A more reliable fastening can also be achieved at the same time by such a fastening disk. The fastening disc preferably has an opening which engages radially around the motor housing. Preferably, the fastening disk contacts against the fastening flange, in particular at least against the outer radial edge of the fastening flange.

It is further preferred that the fastening disk has a completely circular opening, which corresponds to the outer diameter of the motor housing, in particular in the region of the fastening flange. The external shape of the fastening disc may be a perfect circle or a rectangle. Preferably, a fastening opening (e.g. a hole) is brought into the fastening disc for each fastening means, through which fastening opening the fastening means is introduced into the pump housing. It is further preferred that, with the bolt as the fastening means, the bolt head axially abuts against the fastening disc, thereby fixing the fastening disc relative to the pump housing.

According to a further preferred embodiment, the fastening disk radially surrounds the motor housing. Preferably, the fastening disk is in axial and/or radial contact against the motor housing, wherein an assembly gap can be provided in the radial direction.

According to a further preferred embodiment, the motor housing can be rotatably mounted on the pump housing through 360 °. This means that the motor housing can be rotated about its axis relative to the pump housing when the fastening means are released and can be fixed in a fixed manner to the pump housing in a new rotational position after such a rotation.

The object is also achieved by a method of manufacturing a rotary pump in the following steps:

axially sleeving a motor housing defining a longitudinal axis and an annular fastening flange on the pump housing at any rotational position;

The fastening flange is fixed in position at the pump housing by fastening means arranged spaced apart from one another.

Such fixing preferably includes the possibility of undoing the fixing, for example in the form of bolts which can be screwed into the pump housing as fastening means.

According to a preferred development, the method comprises the following steps after the sheathing:

Rotating a motor housing on the pump housing to a secured position; and

The fastening flange is fixed at a fastening position of the motor housing.

In order to achieve a rotation of the motor housing, the fastening means is preferably not completely fixed at the pump housing. This means, for example, that the screw is released but not removed from the pump housing, in the case of a screw as fastening means, so that the motor housing is rotatable.

causing a fastening disk radially surrounding the motor housing to act on the fastening flange; and

The fastening plate is fixed at the pump housing by means of fastening means.

This method also has other advantages and designs similar to the rotary pump described above, as will be apparent to those skilled in the art.

Drawings

The utility model will be elucidated in detail hereinafter with the aid of preferred embodiments with reference to the accompanying drawings.

In the drawings:

fig. 1 shows a rotary pump according to a preferred embodiment of the utility model in a perspective view, with a pump housing and a motor housing which is fitted over the pump housing in any rotational position,

Figure 2 shows the rotary pump of figure 1 in an exploded perspective view according to a preferred embodiment of the utility model,

Fig. 3 shows in perspective view the rotary pump of fig. 1, having an electronics housing sleeved over a motor housing,

Fig. 4 shows in perspective view the rotary pump of fig. 1, with a fastening disc fitted over the motor housing,

FIG. 5 shows the rotary pump of FIG. 4 in an exploded perspective view, and in accordance with a preferred embodiment of the present utility model

Fig. 6 shows in cross-section the rotary pump of fig. 4 with the electronics housing sleeved over the motor housing in accordance with a preferred embodiment of the present utility model.

Detailed Description

Fig. 1 shows a rotary pump 1 according to a preferred embodiment of the utility model in a perspective view, the rotary pump 1 having a pump housing 2 and a motor housing 3 which is fitted over the pump housing 2 in any rotational position.

The pump housing 2 has a connection end 4 of opposite design in the manner of an in-line housing, wherein an impeller for conveying fluid, not shown in the figures, is arranged in the pump housing 2. The impeller is driven by means of a motor of a conventional type, not shown in the figures, which is arranged in the motor housing 3. The pump housing 2 and/or the motor housing 3 may be made of gray cast iron, plastic and/or composite material.

The motor housing 3 is pot-shaped, configured in such a way as to form a longitudinal axis 5, and has a circular inner and outer diameter, respectively. The longitudinal axis 5 of the motor housing 3 extends orthogonally to the normal or longitudinal extension of the connection end 4. An opening is formed at the end face of the pot-shaped motor housing facing the pump housing 2, the plane of which extends perpendicularly to the longitudinal axis 5 of the motor housing 3. The opening is radially surrounded by an annular fastening flange 6 which extends around the opening and contacts against the motor housing 2. A seal, not shown, is provided between the fastening flange 6 and the motor housing 2.

As can be seen from the exploded view of the rotary pump 1 according to fig. 2, the fastening flange 6 is of disk-like construction, wherein the outer radial edge of the fastening flange 6 extends axially towards the longitudinal axis 5 of the motor housing 3. Correspondingly, the fastening flange 6 bears with a radial surface against the motor housing 3. The fastening flange 6 is constructed in one piece with the pot-shaped remaining part 7 of the motor housing 3. The circular outer diameter of the pot-shaped remaining part 7 increases towards the fastening flange 6, so that the transition 8 is constructed in a quarter circle from the fastening flange 6 towards the pot-shaped remaining part 7 from a side view.

Four fastening means 9 fix the motor housing 3 in a fixed position at the pump housing 2. The fastening means 9 are designed as cylinder head bolts or, as shown in the drawing, as round head bolts with internal hexagonal or cross-shaped recesses. Bolts with flat spherical and/or lenticular shaped top surfaces, hemispherical top surfaces, flat top surfaces, or other bolts with radially extending threaded top surfaces or bolt heads 10 may be used as well. The round-head screw is screwed into the pump housing 2 in the direction of the longitudinal axis 5, so that the screw head 10 axially surrounds the fastening flange 6 and is thus pressed axially against the motor housing 3.

Four fastening means 9 are shown here, which are arranged around the motor housing 3 at regular intervals, i.e. at 90 ° intervals around the motor housing. Alternatively, for example, 2, 3, 5, 6, 8, 10 or another number of fastening means 9 may be provided, which are preferably arranged at regular intervals. In the region of the fastening means 9, radially extending material recesses 11 and material thickenings 12 are alternately introduced into the transition 8.

The fastening flange 6 is pressed axially against the motor housing 3 by means of the fastening means 9 or the cylinder head bolts with their bolt heads 10, so that the motor housing 3, which is axially fitted over the pump housing 2, is fixed in any rotational position. In order to rotate the motor housing 3 relative to the pump housing 2, the fastening means 9 or the cylinder head bolts are loosened (for example by means of a few rotations), so that the motor housing 3 is still connected to the pump housing 2, but is not fixed there in a fixed manner. After the motor housing 3 has been turned or rotated relative to the pump housing 2, the fastening means 9 or the cylinder head bolts can be re-fastened (for example by screwing in) in order to fasten the fastening flange 6 again axially non-rotatably at the motor housing 3.

Fig. 3 shows the rotary pump 1 of fig. 1 in a perspective view, with an electronics housing 14 that is fitted over the motor housing 3 in extension of the longitudinal axis 5, according to a preferred embodiment of the utility model. In this way, the motor housing 3 is arranged between the pump housing 2 and the electronics housing 14, in particular with respect to the longitudinal axis 5. In the square electronics housing 14 extending orthogonally to the longitudinal axis 5 of the motor housing 3 in terms of its longitudinal extension, electronics and/or control means, not shown, are provided for controlling the motor of the rotary pump 1.

Alternatively or additionally, the electronics housing 14 may be formed as a junction box in which connection terminals for connecting the motor may be provided. The electronics housing 14 is connected to the motor housing 3 in a stationary manner, for example screwed to the motor housing 3 or snapped onto the motor housing. If the motor housing 3 is now rotated relative to the pump housing 2 as described above, the electronics housing 14 will also rotate therewith.

Fig. 4 shows the rotary pump 1 of fig. 1 in a perspective view, with a fastening disk 13 fitted over the motor housing 3, according to a preferred embodiment of the utility model. In the exploded perspective view of the rotary pump 1 according to fig. 4 in fig. 5, the fastening disk 13, which is of disk-like design and has a circular opening, corresponds to the outer diameter of the motor housing 3 in the region of the fastening flange 6.

As can be seen from the sectional view of fig. 6, which shows the rotary pump 1 of fig. 4 and the electronics housing 14 that is mounted on the motor housing 3, the fastening disk 13 protrudes radially around the fastening flange 6 in the region of a completely circular opening, while the outer radial edge has a rectangular shape in plan view, with holes 15 for the fastening means 9 or the cylinder head bolts being provided at the four corners thereof.

To assemble the rotary pump 1, the motor housing 3 as described above is first fitted over the pump housing 2 at an arbitrary rotational position. The fastening disk 13 is then axially slipped onto the motor housing 3, so that the fastening disk 13 abuts against the side of the fastening flange 6 facing away from the pump housing 2. The fastening means 9 or the cylinder head bolts are then guided through the holes 15 and screwed to the pump housing 2 in order to fix the motor housing 3 to the pump housing 2 in a stationary manner. The fastening flange 6 is arranged axially between the fastening disk 13 and the pump housing 2.

In order to rotate the motor housing 3 relative to the pump housing 2, the fastening means 9 or the cylinder head bolts as described above are loosened, but not removed, so that the motor housing 3 is also held at the pump housing 2 by means of the fastening disc 13. After the motor housing 3 has been rotated into an arbitrary rotational position, the fastening means 9 or the cylinder head bolts are again screwed down, so that the motor housing 3 is fixed at the pump housing 2 in the new rotational position.

The described embodiments are examples only, which can be modified and/or supplemented in a number of ways within the scope of the claims. Each feature used to describe a certain embodiment can be used in any other embodiment either alone or in combination with other features. Each feature of the embodiments for illustrating a certain class can also be applied in a corresponding manner in another class of embodiments.

List of reference numerals

The rotary pump 1 is provided with a pump,

The pump housing 2 is provided with a pump housing,

The motor housing 3 is provided with a housing,

The connection end (4) is provided with a connecting pin,

The longitudinal axis 5 of the tube is,

The fastening flange 6 is provided with a fastening flange,

The remaining part 7 of the pot-shape,

The transition portion 8 is provided with a recess,

The fastening means 9 are provided with a locking means,

The head portion 10 of the bolt,

The recess 11 of the material,

The thickened portion 12 of the material,

The fastening plate 13 is fastened to the base plate,

The housing 14 of the electronic device is provided with,

And a hole 15.

Claims

1. A rotary pump (1) having: a pump housing (2), a motor housing (3) defining a longitudinal axis (5) and axially fitting over the pump housing (2) in any rotational position, and a plurality of fastening means (9), wherein

The motor housing (3) has an annular fastening flange (6) at its end facing the pump housing (2), and

The fastening flange (6) is fixed in a position-fixed manner at the pump housing (2) by the fastening means (9) arranged at a distance from one another, wherein

The fastening means (9) are designed as bolts which are screwed into the pump housing (2) for position fixing, and/or

Has a fastening disk (13), wherein the fastening flange (6) is arranged axially between the fastening disk and the pump housing (2) and the fastening means (9) fix the fastening disk to the pump housing (2) in a positionally fixed manner.

2. The rotary pump (1) according to claim 1, having a seal arranged between the motor housing (3) and the pump housing (2).

3. Rotary pump (1) according to claim 1, wherein the fastening flange (6) is of disk-like design.

4. A rotary pump (1) according to any one of claims 1 to 3, wherein the motor housing (3) is designed pot-like with radially extending openings and the fastening flange (6) extends radially away from the openings around the openings.

5. A rotary pump (1) according to any one of claims 1 to 3, wherein the fastening means (9) are designed as cylinder head bolts.

6. Rotary pump (1) according to claim 5, wherein the bolt has a bolt head (10) by means of which the fastening flange (6) is held axially.

7. A rotary pump (1) according to any one of claims 1 to 3, wherein the fastening means (9) extend parallel to the longitudinal axis (5).

8. A rotary pump (1) according to any one of claims 1 to 3, having 2, 4, 6, 8 or 10 fastening means (9) which are arranged at regular intervals relative to each other and/or which fastening means (9) radially enclose the fastening flange (6) and/or which fastening means (9) axially press the fastening flange (6) against the pump housing (2).

9. A rotary pump (1) according to any one of claims 1 to 3, having an electronics housing (14) and/or a junction box, the electronics housing (14) and/or junction box being arranged at the motor housing in a fixed position.

10. Rotary pump (1) according to claim 9, the electronics housing (14) and/or a junction box being arranged at an end of the motor housing facing away from the pump housing (2).

11. A rotary pump (1) according to any one of claims 1 to 3, having the fastening disc (13), wherein the fastening disc (13) surrounds the motor housing (3) in a radial direction.

12. A rotary pump (1) according to any one of claims 1 to 3, wherein the motor housing (3) is rotatable over 360 ° around the pump housing (2).