Pump device having a temperature-controllable housing part

Abstract

The invention relates to a pump device (1), comprising at least one temperature-controlled housing part, wherein the at least one temperature-controlled housing part (3) comprises a first wall (27) in contact with a temperature-controlled medium and a second wall (28) spaced apart from the first wall (27), wherein the first wall (27) and the second wall (28) form a temperature-controlled chamber (29).

Description

Technical Field

[0001] The invention relates to a pump device having at least one temperature-controllable housing part. Background Art

[0002] Such pump devices are often used in industrial plants, in particular in chemistry and petrochemistry. Here, a medium is often pumped or delivered, which medium can only be delivered or pumped at a specific temperature.

[0003] Such a medium is, for example, sulfur. If the temperature drops or rises too much at certain locations in the pump during the pumping process, the medium may crystallize and thus lead to dry running of the pump. In addition, such crystallization may also contaminate the conveying medium.

[0004] Another example is the delivery of heavy oil or bitumen. In order to deliver these media, the pumps used must be preheated, for example at very low temperatures, to avoid dry running of the pumps, since heavy oil and bitumen are too viscous to be pumped without prior heating.

[0005] Especially for process pumps, precise temperature regulation is crucial, since fluctuating temperatures can disrupt the entire process.

[0006] The disadvantage of known heatable spiral housings is that they are composed of a plurality of individual parts, which are mostly connected to each other by welding. If the welding points are not welded correctly, leakage may occur at the welding points, which greatly deteriorates the function of the pump.

[0007] Furthermore, with such a welded structure, it is difficult to uniformly adjust the temperature of the entire housing including the flange.

[0008] In conventional pumps, forces and moments acting on the connections or the inlet and outlet ports can cause the housing to deform and cause the impeller to come into contact with adjacent components of the pump.

[0009] Points in the process flow / positions on the pump where sliding ring seals are usually arranged, in particular the area between the shaft and the housing cover of the pump, have also proven in practice to be critical areas in which problems with providing the necessary temperatures occur relatively frequently.

[0010] Heating the housing cover / spiral housing of the pump is usually not sufficient at this point to achieve the optimum temperature for conveying a particular medium.

[0011] In addition, conventional sealing covers have the additional disadvantage that they consist of a plurality of individual parts, which are usually connected to one another by welding. If the welding locations are not welded correctly, leakage may occur at the welding locations, which further deteriorates the function of the pump.

[0012] In addition, for such sealing cover, it is difficult or impossible to realize in practice to arrange the pipelines that extend through the possible cooling chamber / heating chamber arranged in the sealing cover. For example, for traditional sealing cover, in order to provide external circulation, the heating chamber of the sealing cover must be drilled through. Summary of the invention

[0013] The object of the present invention is to reduce or even completely eliminate the disadvantages of the devices known from the prior art. Specifically, the object of the present invention is to provide a pump device by means of which the delivery of a medium at an optimum delivery temperature is ensured.

[0014] This object is achieved by a pump device having the features of claim 1 , according to which the at least one temperature-controllable housing part has a first wall (of the temperature-controllable medium) and a second wall spaced apart from the first wall, wherein the first wall and the second wall form a temperature-controlling chamber.

[0015] It has proven to be particularly advantageous here if at least one circularly extending channel arranged substantially concentrically to the axis of rotation is formed in the temperature-controlled chamber.

[0016] It has proven to be particularly advantageous to provide a plurality of supports in the temperature-controlled chamber, which connect the inner wall to the outer wall and form a circularly extending channel arranged essentially concentrically with the axis of rotation, thereby ensuring that the component can be heated or cooled even if one or more channels are blocked.

[0017] In order to allow flow to pass through all channels simultaneously, a first collecting chamber and a second collecting chamber are formed in the temperature-controlled chamber.

[0018] The configuration of the third collecting chamber simplifies complete emptying of the channel, if necessary.

[0019] In order to be able to supply cooling or heating medium to or from the temperature-controlling chamber in an operator-friendly manner, a first connection device for a supply line is provided, through which the cooling or heating medium for temperature-controlling the hydraulic housing flows into the temperature-controlling chamber. In addition, a second connection device is provided for connecting the supply line, through which the cooling or heating medium flows out of the temperature-controlling chamber again.

[0020] In order to ensure complete emptying of the temperature-control chamber in a simple manner if necessary, the temperature-controllable component has a third connection device, which is connected to the third collecting chamber and is used to connect a further line.

[0021] Advantageously, the at least one channel or the plurality of channels have a defined structure for maximizing turbulence in the cooling medium or heating medium and thus for maximizing heat exchange.

[0022] In order to ensure a uniform temperature distribution, it is advantageous to design the outer and inner walls as thin as possible. In order for the temperature-controlled component to be able to withstand the internal pressure reliably, the component advantageously has a supporting structure. The supporting structure absorbs the forces and moments occurring, for example, on the suction connection and the pressure connection and conducts them away. In addition, the component is reinforced with minimal deadweight, thereby minimizing, for example, the risk of grinding of the impeller, on the slot ring usually arranged in the hydraulic housing, or on a part of the hydraulic housing. The supporting structure formed on the outer wall by the material accumulation supports both the relatively thin inner wall of the hydraulic housing and the relatively thin outer wall of the hydraulic housing and thus relieves the load on them.

[0023] It is particularly advantageous here if the supporting structure connects defined structural elements of the component, in particular the housing foot, the suction connection, the pressure connection and connection points to one another, to which other components of the pump device can be fastened.

[0024] A further advantageous embodiment provides that the supporting structure has substantially horizontally, vertically and diagonally extending accumulations of material which form nodes or intersections.

[0025] It has been found to be particularly advantageous that the free end of the support structure has a blind hole for receiving a suitable fixing means, in particular a screw or a bolt. Here, an internal thread is advantageously provided, into which the fixing means can be screwed.

[0026] A further object of the present invention is to provide a method for producing a hydraulic housing for a pump device as a one-piece component by means of 3D printing, in particular 3D printing of metal, selective laser melting (SLM) or by means of investment casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other advantages, features and effects of the present invention are apparent from the following drawings.

[0028] Figure 1 shows a longitudinal section through a pump device having a hydraulic housing according to the invention,

[0029] Figure 2 The longitudinal section of the hydraulic housing according to the invention is shown in an enlarged view.

[0030] Figure 3 Shown in accordance with Figure 2 A perspective view of the hydraulic housing,

[0031] Figure 4 shows a longitudinal section through another embodiment of a hydraulic housing, and

[0032] Figure 5 shows a schematic diagram of the hydraulic housing,

[0033] Figure 6 Different views of the sealing cover are shown, and

[0034] Figure 7 Different views of a sealing cover with a connection for a quench medium are shown. DETAILED DESCRIPTION

[0035] Figure 1 A pump device 1 in the form of a magnetic clutch pump device is shown. The pump device 1 has a multi-part pump housing 2 of a centrifugal pump, which comprises a temperature-controlled component 3 designed as a hydraulic housing, a housing cover 4, a bearing support web 5, a bearing support 6 and a bearing cover 7.

[0036] The component 3, which is designed as a hydraulic housing in the present example, has an inlet 9 for sucking in a conveying medium on a suction connection 8 and an outlet 11 for discharging the conveying medium on a pressure connection 10. The housing cover 4 is arranged on the side of the hydraulic housing 3 opposite the inlet 9. The bearing support web 5 is fixed on the side of the housing cover 4 facing away from the hydraulic housing 3. The bearing seat 6 is arranged on the side of the bearing support web 5 opposite to the housing cover 4. The bearing cover 7 is in turn fixed on the side of the bearing seat 6 facing away from the bearing support web 5.

[0037] A gap pot 12 is fastened to the side of the housing cover 4 facing away from the hydraulic housing 3 and extends at least partially through an interior space 13 defined by the pump housing 2, in particular by the housing cover 4, the bearing support web 5 and the bearing support 6. The gap pot 12 seals a chamber 14 enclosed by it in a gas-tight manner relative to the interior space 13.

[0038] An impeller shaft 15 rotatable about an axis of rotation A extends from a flow chamber 16 defined by means of the hydraulic housing 3 and the housing cover 4 through an opening 17 provided in the housing cover 4 into the chamber 14 .

[0039] An impeller 18 is fixed to the axial end of the impeller shaft 15 located inside the flow chamber 16, and an inner rotor 19 arranged inside the chamber 14 is arranged at the opposite axial end. The inner rotor 19 is equipped with a plurality of magnets 20, which are arranged on the side of the inner rotor 19 facing the gap pot 12.

[0040] A bearing arrangement 21 , which is operatively connected to an impeller shaft 15 , which is rotatably drivable about an axis of rotation A, is arranged between the impeller 18 and the inner rotor 19 .

[0041] A drive motor (not shown), preferably an electric motor, drives a drive shaft 22. The drive shaft 22, which can be driven rotatably about an axis of rotation A, is arranged substantially coaxially with the impeller shaft 15. The drive shaft 22 extends through the bearing cover 7 and the bearing seat 6 and is supported in two ball bearings 23, 24 arranged in the bearing seat 6. An outer rotor 26 having a plurality of magnets 25 is arranged at the free end of the drive shaft 22. The magnets 25 are arranged on the side of the outer rotor 26 facing the gap pot 12. The outer rotor 26 extends at least partially within the range of the gap pot 12 and cooperates with the inner rotor 19 in such a way that the rotating outer rotor 26 also sets the inner rotor 19 and thus the impeller shaft 15 and the impeller 18 into a rotational motion by means of magnetic force.

[0042] Figure 2 , 3 4 show in detail an exemplary embodiment of the hydraulic housing 3. The hydraulic housing 3 has a first wall or inner wall 27 and a second wall or outer wall 28 spaced apart from the inner wall 27. The inner wall 27 and the outer wall 28 form or define a conditioning chamber 29. The conditioning chamber 29 extends between the inner wall 27 and the outer wall 28 and extends substantially within the region of the portion of the inner wall 27 that defines the flow chamber 16. That is, starting from a surface 30 of the hydraulic housing 3, on which the housing cover 4 rests, through the entire hydraulic housing 3 to the suction pipe 8. In the exemplary embodiment shown, a plurality of support members 31 are provided in the conditioning chamber 29, which connect the inner wall 27 to the outer wall 28. Thus, as in Figure 5 As schematically shown in FIG. 1 , a circularly extending channel 32 is produced, which is arranged substantially concentrically with the axis of rotation A. If the support element is omitted, a circularly extending channel 32 is produced, which is arranged substantially concentrically with the axis of rotation A. Figure 4 The cross section shown has a substantially S-shaped course.

[0043] As in Figure 5 As shown in FIG. , in the region extending from the suction connection 8 to the pressure connection 10, the support 31 and the channel 32 are not continuous, that is, they are interrupted. Figure 5 The web shown in FIG. 1 , which extends from the pressure connection 10 to the suction connection 8 and connects the inner wall 27 and the outer wall 28, forms a partition wall 33 in the temperature-controlled chamber 29. Here, the support element 31 does not contact the partition wall 33, so that, as in FIG. Figure 5As schematically shown in FIG. 2 , a first collecting chamber 34 and a second collecting chamber 35 are formed in the temperature-controlled chamber 29. The first collecting chamber 34 and the second collecting chamber 35 have a substantially radial extension starting from the region near the suction connection 8, especially in the direction of the pressure connection 10. The support element 31 is also not formed continuously in the radially extending region, which is located below the suction connection 8 in the upright hydraulic housing 3. This forms a radially extending region. Figure 5 The third collection chamber 36 is schematically shown in FIG.

[0044] As in Figure 3 As shown in FIG. 1 , a first connection device 37 is provided on the pressure connection 10, through which a cooling or heating medium for temperature control, that is, for cooling and / or heating the hydraulic housing 3, can flow into the temperature control chamber 29. A second connection device, referenced by reference numeral 38, is arranged opposite the first connection device 37, through which a cooling or heating medium can flow out of the temperature control chamber 29 again. The second connection device 38 is arranged at Figure 5 This can be best seen in .

[0045] The hydraulic housing 3 has a third connection device 39 connected to the third collecting chamber 36, which is provided for completely draining the conditioning chamber 29. The connection device 39 is arranged so that the emptying of the conditioning chamber 29 takes place essentially in the axial direction. The connection device 39 is designed for completely draining the contained cooling medium or heating medium at the lowest point of the conditioning chamber 29.

[0046] The channel 32 or the channels 32 have a defined structure O, which is used to maximize the turbulence in the cooling or heating medium and thus to maximize the heat exchange. In the embodiment shown, there are channels 32, which are, for example, circular, oval, essentially L-shaped or V-shaped or have recesses. The support member 31 can have a wing-shaped profile, for example. The one or more channels 32 and the support member 31 can also have a bionic structure, for example a structure similar to shark skin. In the embodiment shown by way of example, the outer wall 28 has a defined surface structure O, in particular a surface structure O formed in a corrugated manner, on the side pointing to the external environment.

[0047] As from Figure 2 and 3 As can be seen in the figure, the hydraulic housing 3 has a fourth connection device 40, which is intended for completely emptying the flow chamber 16. The connection device 40 is arranged above the connection device 39. The connection device 40 is arranged in such a way that the emptying of the flow chamber 16 takes place essentially in the axial direction.

[0048] In order to cool or heat the hydraulic housing 3, the cooling or heating medium flows via a first connection 37 into a first collecting chamber 34 of the temperature-controlling chamber 29 and from there into the channels 32 which are directly connected to one another in terms of fluid technology, until finally into a second collecting chamber 35 and from there out of the temperature-controlling chamber 29 via a second connection 38. In this way, a uniform temperature distribution is achieved in the region of the hydraulic housing 3.

[0049] It goes without saying that the cooling medium or heating medium can also be supplied to the conditioning room 29 via the second connection 38 and can flow out of the conditioning room 29 via the first connection 37 .

[0050] As in Figures 2 to 4 As shown in FIG. 1 , the hydraulic housing 3 further comprises a supporting structure 41 which absorbs and dissipates the forces and moments occurring on the suction connection 8 and the pressure connection 10 . In addition, a reinforcement of the hydraulic housing 3 is achieved thereby, which allows the impeller 18 to be Figure 1 4, or on a part of the hydraulic housing 3. The support structure 41 formed by the material accumulation on the outer wall 28 thus supports and relieves the relatively thin inner wall 27 and the relatively thin outer wall of the hydraulic housing 3. The support structure 41 connects defined structural elements of the hydraulic housing, in particular the housing foot 43, the suction connection 8, the pressure connection 10 and the connection point 44 to one another, to which other components of the pump device, such as the housing cover 4, can be fastened.

[0051] The support structure 41 is designed to be force-flow optimized or topologically optimized. The support structure 41 has substantially horizontal, vertical and diagonally extending material accumulations that form nodes or intersections 45. The free end 46 of the support structure 41 has a blind hole 47 that is provided for receiving a fixing means (not shown), such as a screw or bolt.

[0052] Figure 1 A pump device 1 is shown in the form of a magnetic clutch pump device. However, it can be seen that the hydraulic housing 3 according to the invention can be used for other pump devices, such as canned motor pumps, tandem pumps, or any pumps without magnetic clutch.

[0053] like Figure 6As shown in a-6i, the temperature-adjustable component 3 is constructed as a sealing cover, in particular for mounting a sliding ring seal, in the example shown. Another embodiment of the component 3 has a connection device 37 or an inlet for a cooling / heating medium and a second connection device 38 or an outlet for a cooling / heating medium. The first connection device 37 and the second connection device 38 are arranged opposite to each other. As a result, the temperature-adjusting medium is guided through the annular component 3. As described in detail in relation to the embodiment of the present invention, the temperature-adjusting component 3 is constructed as a sealing cover, in particular for mounting a sliding ring seal. Another embodiment of the component 3 has a connection device 37 or an inlet for a cooling / heating medium and a second connection device 38 or an outlet for a cooling / heating medium. The first connection device 37 and the second connection device 38 are arranged opposite to each other. As a result, the temperature-adjusting medium is guided through the annular component 3. As described in relation to the embodiment of the present invention, the temperature-adjusting component 3 is constructed as a sealing cover, in particular for mounting a sliding ring seal. Figure 5 As described, a partition wall (not shown here) can be arranged in the temperature-controlled chamber, so that a first collecting chamber and a second collecting chamber are formed in the temperature-controlled chamber.

[0054] The cooling / heating medium circulates in at least one channel 32 which is formed in the interior of the temperature-controllable component 3 and is provided with a defined surface structure O which serves to maximize the turbulence in the cooling / heating medium and thus the heat exchange.

[0055] Furthermore, the sealing cover 3 has a third connection 39 which can be used to discharge the contained cooling / heating medium at the lowest point of the cooling / heating channel 32 or the temperature-control room (not shown) in the sealing cover. For external circulation, a fifth connection 48 can be provided which can be discharged from the component 3 again via the third connection.

[0056] like Figure 7 As shown in FIG. 7i , the temperature-controllable component 31 according to the invention can also be equipped with a sixth connection device 49 or an inlet for a quench medium and a seventh connection device 50 or an outlet for the quench medium.

[0057] In addition, Figure 7 It can be seen in FIGS. 7 g and 7 h that the rotation protection 51 of the slide ring seal is integrated in the temperature-controllable component 3 .

[0058] The housing part 3 described above for the pump device 1 is advantageously produced as a one-piece component by means of 3D printing, in particular metal 3D printing, selective laser melting (SLM) or by means of precision casting.

Claims

1. A pump device (1) having at least one temperature-controllable housing part, characterized in that The at least one temperature-controllable housing part (3) comprises a first wall (27) in contact with a temperature-controllable medium and a second wall (28) spaced apart from the first wall (27), wherein the first wall (27) and the second wall (28) form a temperature-controlling chamber (29). wherein the first wall (27) is an inner wall (27), and the second wall (28) is an outer wall (28), and wherein a plurality of supports (31) are provided in the temperature-controlled chamber (29), the supports connecting the inner wall (27) and the outer wall (28) and forming a plurality of channels (32) extending in a circular shape and arranged substantially concentrically with the rotation axis (A), A first collecting chamber (34) and a second collecting chamber (35) are formed in the temperature-controlled chamber (29), wherein the first collecting chamber and the second collecting chamber have a substantially radial extension starting from a region close to the suction connection pipe (8). The first collecting chamber (34) and the second collecting chamber (35) are fluidically connected to one another via the channel (32).

2. The pump device (1) according to claim 1, characterized in that At least one circular channel (32) which is arranged substantially concentrically with the axis of rotation (A) is formed in the temperature-control chamber (29).

3. The pump device (1) according to claim 1 or 2, characterized in that A third collection chamber (36) is constructed.

4. The pump device (1) according to claim 1 or 2, characterized in that A first connecting device (37) is provided, through which a cooling medium or a heating medium for controlling the temperature of the housing (3) flows into the temperature-controlling chamber (29), and a second connecting device (38) is provided, through which the cooling medium or the heating medium flows out of the temperature-controlling chamber (29).

5. The pump device (1) according to claim 3, characterized in that The temperature-controlled housing part (3) has a third connection device (39) connected to the third collecting chamber (36), the third connection device being provided for completely emptying the temperature-controlled chamber (29).

6. The pump device (1) according to claim 4, characterized in that The channel (32) or channels (32) have a defined structure for maximizing turbulence in the cooling or heating medium and thereby for maximizing heat exchange.

7. The pump device (1) according to claim 1, characterized in that The temperature-controllable component (3) is a hydraulic housing (3) which has a supporting structure (41).

8. The pump device (1) according to claim 7, characterized in that The supporting structure (41) connects defined structural elements of the hydraulic housing (3) to one another.

9. The pump device (1) according to claim 8, characterized in that The supporting structure (41) connects the housing foot (43), the suction connection (8), the pressure connection (10) and a connection point (44) to one another, to which other components of the pump device (1) can be fastened.

10. The pump device (1) according to claim 7, characterized in that The support structure (41) has substantially horizontally, vertically and diagonally extending accumulations of material which form nodes or intersections (45).

11. The pump device (1) according to any one of claims 7 to 10, characterized in that The free end (46) of the support structure (41) has a blind hole (47) for receiving a suitable fixing element.

12. Pump device (1) according to claim 11, characterized in that The fixing element is a screw or a bolt.

13. Method for producing a temperature-controllable housing part (3) as a one-piece component for a pump device (1) according to any of the preceding claims by means of 3D printing, selective laser melting (SLM) or by means of precision casting.

14. The method according to claim 13, characterized in that The 3D printing is metal 3D printing.

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