Two-stage pump
By designing a dual-stage pump, combining the liquid ring stage and the side channel stage, sharing the medium space and overflow opening, efficient pumping of gas and liquid is achieved, solving the type limitations and complexity problems of existing pumped media, and providing Compact and efficient pumping solution.
Patent Information
- Application Number
- CN202380039966.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-05-13
- Filing Date
- 2023-02-20
- Publication Date
- 2024-12-20
AI Technical Summary
Existing pumps have type limitations when pumping different media, making it difficult to take into account both gas and liquid pumps. The design complexity of self-priming and non-self-priming pumps is lacking compact and efficient alternatives.
A dual-stage pump is designed, combining the liquid ring stage and the side channel stage, and the two-way flow of the medium is achieved through the shared medium space and overflow opening. It adopts a shared impeller and interrupter design to achieve efficient pumping of gas and liquid.
The two-way pumping of gas and liquid is realized, which improves pumping efficiency and compactness, avoids the complexity of successively setting up multiple pumps, and is suitable for the pumping needs of multiple media.
Smart Images
Figure CN119173693A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a pump for pumping at least one medium. Background Art
[0002] Different types of pumps are known in the prior art. Different media, such as gases or liquids, can be moved by the pumps. Some pump types are suitable for both gases and liquids or only for gases or liquids. In addition, there are self-priming and non-self-priming pump types for pumping liquids. For example, a liquid ring pump is known that forms a liquid ring by eccentrically arranging an impeller (see, for example, DE 199 13 632 C2), or a side channel pump characterized by a delivery channel with an interrupter is also known (see, for example, EP 0 118 027 B1). It is also known in the prior art that different pump types are arranged in succession (see, for example, DE 24 62 187 A1 or DE 101 08 631 B4, DE 33 03 460 A1, DE 102007 013 872 A1 or DE 31 28374 A1). Summary of the invention
[0003] The invention is based on the object of specifying a pump which is an alternative to the prior art.
[0004] The present invention achieves the above-mentioned object through a two-stage pump for pumping a medium, wherein the pump has a liquid ring stage, a side channel stage and two medium passages, wherein the liquid ring stage has a medium space and two medium openings, wherein the two medium openings of the liquid ring stage are connected to the medium space of the liquid ring stage, wherein the side channel stage has a medium space and two medium openings, wherein the two medium openings of the side channel stage are connected to the medium space of the side channel stage, and wherein one of the two medium openings of the side channel stage and one of the two medium openings of the liquid ring stage coincide with each other to form a common overflow opening.
[0005] The pump according to the present invention has two stages: a liquid ring stage and a side channel stage. Therefore, the associated pump principles are respectively implemented in these stages. The pump has two media passages, through which the medium, for example, gas such as air or liquid such as water, can flow in or out. Preferably, the pump can be operated in two directions so that the media passages are inlet and outlet, respectively. Each of the two stages has its own media space and two media openings, through which the medium flows into or flows out of the respectively associated media space. The media openings of the side channel stage and the liquid ring stage overlap into a common overflow opening. Therefore, the two stages share an opening so that the medium from one stage reaches the other stage via the common overflow opening. That is, the pump according to the present invention combines two different pump types into a unit, which is characterized by its compactness. In particular, this involves a two-stage pump, rather than two separate pumps arranged in succession.
[0006] One design solution is that the other of the two media openings of the side channel stage and the other of the two media openings of the liquid ring stage are connected to one of the two media passages, respectively. In this design solution, the media openings that do not overlap in the overflow opening are respectively connected to the media passages of the pump itself, or in another design solution, form the media passages.
[0007] One design solution proposes that the liquid ring stage further comprises a cover component, a bottom component and an impeller, the cover component of the liquid ring stage and the bottom component of the liquid ring stage comprise a medium space of the liquid ring stage, the medium space of the liquid ring stage has a cylindrical shape around a longitudinal axis, the impeller of the liquid ring stage has blades extending from the rotation axis, the blades of the impeller of the liquid ring stage are arranged in the medium space of the liquid ring stage, and the impeller of the liquid ring stage is arranged relative to the medium space of the liquid ring stage so that the rotation axis of the impeller is offset from the longitudinal axis of the medium space. The liquid ring stage is explained in detail in the design solution. Here, the impeller is eccentrically arranged in the cylindrical medium space.
[0008] One design solution is that the side channel stage further comprises a cover part, a bottom part and an impeller, the cover part of the side channel stage and the bottom part of the side channel stage comprising a medium space of the side channel stage, the bottom part of the side channel stage having a delivery channel with an interrupter, the delivery channel being open toward the medium space of the side channel stage, the impeller of the side channel stage having blades extending from the rotation axis, the blades of the impeller of the side channel stage being arranged in the medium space of the side channel stage, the medium space of the side channel stage having a cylindrical shape around the longitudinal axis, and the impeller of the side channel stage being rotatably arranged in the medium space of the side channel stage around the longitudinal axis. The design solution describes a side channel stage as follows: the medium space of the side channel stage having a delivery channel with an interrupter. The impeller is hereby concentrically arranged in the medium space.
[0009] One design solution proposes that the impeller of the side channel stage and the impeller of the liquid ring stage are designed in one piece. In the design solution, the impeller of the side channel stage and the impeller of the liquid ring stage are formed by a one-piece component. In one design solution, the two blades are two sides of a common carrier. Therefore, in the design solution, the two stages not only share a common overflow opening, but also share a common impeller unit. Alternatively, the impellers are connected to each other to form a common unit.
[0010] One design solution is that the bottom part of the liquid ring stage and the cover part of the side channel stage have a common middle part, and the middle part has an overflow opening. In this design solution, the bottom part of the liquid ring stage and the cover part of the side channel stage partially overlap in that the bottom part and the cover part use a common middle part. The overflow opening that connects the two media spaces to each other is located in the middle part.
[0011] One embodiment provides that the pump pumps two different media. The pump can pump two different media. This can be achieved by combining two different pump principles in one unit.
[0012] One embodiment includes that the medium is a gas or a liquid. If the pump, in particular, pumps two different media, then preferably one is a gas, such as air, on the one hand, and a liquid, such as water, on the other hand.
[0013] According to one design, the pump also has a motor, which has two directions of rotation, and depending on the direction of rotation of the motor, one of the two medium passages is used as a medium inlet or a medium outlet, and the other of the two medium passages is used as a medium outlet or a medium inlet. Therefore, the pump can transport at least one medium in two directions. For this purpose, there is a motor that is preferably coupled to a rotating part so as to move the impellers of the two stages. Thereby, depending on the direction of rotation, one medium passage is used as a medium inlet, and the other medium passage is used as a medium outlet. If the direction of rotation changes, the medium inlet becomes a medium outlet, and vice versa. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In detail, there are multiple possibilities for designing and improving the pump. Other advantages and characteristics of the present invention are derived from the following description of the embodiments in conjunction with the accompanying drawings. The accompanying drawings show:
[0015] Figure 1 The exploded view shows one design of the pump.
[0016] Figure 2 Show Figure 1 The cross section of the pump,
[0017] Figure 3 Show Figure 1 A view of the medium space of the pump's liquid ring stage, and
[0018] Figure 4 Show Figure 1 View of the media space of the side channel stage of the pump. DETAILED DESCRIPTION
[0019] Figure 1 The design of a two-stage pump is shown as an exploded view. Figure 2 The pump is shown in cross section. Figure 1 and Figure 2 Describe together.
[0020] The two stages of the pump are a liquid ring stage 1 and a side channel stage 2, which are arranged directly one after the other. The motor 7 for the pumping function is exemplarily located downstream of the side channel stage 2. The arrangement of the motor 7 upstream of the liquid ring stage 1 - not shown - is also feasible. The pump has two medium passages 3, which are used to input or output the medium depending on the direction of rotation of the motor 7. The medium can be a liquid, such as water, or a gas, such as air.
[0021] The liquid ring stage 1 has a cover part 10 and a bottom part 11. In the embodiment shown, the cover part 10 is implemented in two parts as an example. A medium space 12 is formed between the cover part 10 and the bottom part 11, and two medium openings 13 and 14 are connected to the medium space. The rotation axis 17 of the impeller 15 is offset from the longitudinal axis 16 of the cylindrical medium space 12. Therefore, the rotation of the impeller 15 causes the formation of the liquid ring. Each blade 18 extends from the rotation axis 17 in a star shape.
[0022] The side channel stage 2 also has a cover part 20 and a bottom part 21, between which a - cylindrically embodied - medium space 22 is formed. Two medium openings 23, 24 also open into the medium space 22. The medium is guided here in a conveying channel with an interrupter 26 through an impeller 25. It can be seen here that the interrupter is located below the medium opening 24. The rotation axis 27 of the impeller 25 and the longitudinal axis 28 of the medium space 22 coincide here. The blades 29 of the impeller 25 extend from the rotation axis 27 in a star shape.
[0023] The two stages 1, 2 partially use individual components in common. This is described below.
[0024] The medium opening 13 of the liquid ring stage 1 and the medium opening 23 of the side channel stage 2 overlap to form a common overflow opening 4. Therefore, the medium directly reaches the other stage 2 or 1 from one stage 1 or 2. Another medium opening 14 of the liquid ring stage 1 and another medium opening 24 of the side channel stage 2 form the medium inlet 3 of the pump.
[0025] The overflow opening 4 is located in the intermediate part 5, which belongs to the bottom part 11 of the liquid ring stage 1 and the cover part 20 of the side channel stage 2. This can also be expressed as follows: the bottom part 11 of the liquid ring stage 1 and the cover part 20 of the side channel stage 2 overlap into a common part.
[0026] In the middle part 5, in addition to the overflow opening 4, there is a circular recess in which the rotating part 6 is rotatably arranged. The rotating part 6 includes an impeller 15 of the liquid ring stage 1 and an impeller 25 of the side channel stage 2. The two impellers 15, 25 are on different sides of the carrier of the rotating part 6, which is located in the circular recess of the middle part 5. Here, a sealing effect is generated between the edge around the recess and the carrier of the rotating part 6, so that the bottom part 11 of the liquid ring stage 1 and the cover part 20 of the side channel stage 2 allow the medium to pass through the overflow opening 4 basically only.
[0027] The rotating part 6 is designed and the corresponding blades 18, 29 are arranged so that the rotation axis 17 of the impeller 15 of the liquid ring stage 1 and the rotation axis 27 of the impeller 25 of the side channel stage 2 coincide. The longitudinal axis 28 of the medium space 22 of the side channel stage 2 also runs along the common axis 17, 27. It can be seen here that the blades 18 of the impeller 15 of the liquid ring stage 1 have a greater axial extension than the blades 29 of the impeller 25 of the side channel stage 2.
[0028] Figure 3 a) and Figure 3 b) shows the medium space 12 of the liquid ring stage 1. Figure 3 In a), the media opening 14 of the liquid ring stage 1 and the media opening 24 of the side channel stage 2 can be seen. Furthermore, the media opening 13 of the liquid ring stage 1 can be seen, through which the transition between the liquid ring stage 1 and the side channel stage 2 takes place. Figure 3 b) shows an asymmetrical arrangement of the impeller 15 in the medium space 12. The axis of rotation 17 of the impeller 15 is arranged above the longitudinal axis 16 of the circular cutout at the edge of the medium space 12. Therefore, there is a larger volume below the blades 18 of the impeller 15 in which a liquid ring can be formed.
[0029] Attached photos Figure 4 a) and Figure 4 b) shows the medium space 22 of the side channel stage 2. Figure 4 As can be seen in a), the impeller 25 is located centrally in the media space 22. The media opening 23 which is located above the rotation axis 27 of the impeller 25 can also be seen in the cover part 20. Figure 4b) shows the bottom part 21 in which the supply channel with the interrupter 26 is located. In this view of the rotating part 6 it can also be seen that the blades 29 of the impeller 25 of the side channel stage 2 have a significantly greater radial extension than the blades 18 of the impeller 15 of the liquid ring stage 1.
[0030] When used for two different media, the pump has the optimal performance for the respectively conveyed media, depending on the direction of rotation:
[0031] If the rotation is in one direction, for example clockwise, then the delivery is optimal for gases. The liquid ring stage is active. The side channel stage does not cause a pressure increase, it is passive.
[0032] In the case of counterclockwise rotation, the liquid can be conveyed optimally. The pressure increases in the side channel stages. The liquid ring stages contribute only to the pressure increase to a very small extent.
[0033] Reference numerals list
[0034] 1 Liquid ring level
[0035] 2 Side channel level
[0036] 3 Media Path
[0037] 4 Overflow opening
[0038] 5 Middle parts
[0039] 6 Rotating parts
[0040] 7 Motor
[0041] 10 Liquid ring cover parts
[0042] 11 Bottom part of the liquid ring stage
[0043] 12 Medium space of liquid ring stage
[0044] 13, 14 Medium openings of liquid ring stage
[0045] 15 Liquid ring stage impeller
[0046] 16 Longitudinal axis of the medium space of the liquid ring stage
[0047] 17 Rotation axis of the impeller of the liquid ring stage
[0048] 18 Liquid ring stage impeller blades
[0049] 20 Cover parts for side channel level
[0050] 21 Bottom part of side channel level
[0051] 22 Side channel level medium space
[0052] 23, 24 Medium openings at side channel level
[0053] 25 Side channel stage impeller
[0054] 26 Conveyor channel with interrupter
[0055] 27 Axis of rotation of the impeller of the side channel stage
[0056] 28 Longitudinal axis of the medium space of the side channel stage
[0057] 29 Side channel stage impeller blades
Claims
1. A two-stage pump for pumping at least one medium, The pump comprises a liquid ring stage (1), a side channel stage (2) and two medium passages (3). The liquid ring stage (1) has a medium space (12) and two medium openings (13, 14), The two medium openings (13, 14) of the liquid ring stage (1) are connected to the medium space (12) of the liquid ring stage (1). The side channel stage (2) has a medium space (22) and two medium openings (23, 24), wherein the two medium openings (23, 24) of the side channel stage (2) open into the medium space (22) of the side channel stage (2), and One of the two medium openings (23, 24) of the side channel stage (2) and one of the two medium openings (13, 14) of the liquid ring stage (1) overlap to form a common overflow opening (4).
2. The pump according to claim 1, The other of the two medium openings (23, 24) of the side channel stage (2) and the other of the two medium openings (13, 14) of the liquid ring stage (1) are connected to one of the two medium passages (3).
3. The pump according to claim 1 or 2, The liquid ring stage (1) further comprises a cover part (10), a bottom part (11) and an impeller (15). The cover part (10) of the liquid ring stage (1) and the bottom part (11) of the liquid ring stage (1) comprise a medium space (12) of the liquid ring stage (1), The medium space (12) of the liquid ring stage (1) has a cylindrical shape about a longitudinal axis (16), The impeller (15) of the liquid ring stage (1) has blades (18) extending from a rotation axis (17), wherein the blades (18) of the impeller (15) of the liquid ring stage (1) are arranged in the medium space (12) of the liquid ring stage (1), and The impeller (15) of the liquid ring stage (1) is arranged relative to the medium space (12) of the liquid ring stage (1) so that the rotation axis (17) of the impeller (15) is offset from the longitudinal axis (16) of the medium space (12).
4. A pump according to any one of claims 1 to 3, The side channel stage (2) further comprises a cover part (20), a bottom part (21) and an impeller (25), wherein the cover part (20) of the side channel stage (2) and the bottom part (21) of the side channel stage (2) comprise the medium space (12) of the side channel stage (2), The bottom part (21) of the side channel stage (2) has a conveying channel (26) with an interrupter, wherein the conveying channel (26) is open toward the medium space (22) of the side channel stage (2), wherein the impeller (25) of the side channel stage (2) has blades (29) extending from the axis of rotation (27), wherein the blades (29) of the impeller (25) of the side channel stage (2) are arranged in the medium space (22) of the side channel stage (2), wherein the medium space (22) of the side channel stage (2) has a cylindrical shape about a longitudinal axis (28), and The impeller (25) of the side channel stage (2) is arranged rotatably about a longitudinal axis (28) in the medium space (22) of the side channel stage (2).
5. A pump according to claim 4, wherein dependent on claim 3, The impeller (25) of the side channel stage (2) and the impeller (15) of the liquid ring stage (1) are designed as one piece.
6. A pump according to any one of claims 1 to 5, wherein dependent on claims 3 and 4, wherein the bottom part (11) of the liquid ring stage (1) and the cover part (20) of the side channel stage (2) have a common intermediate part (5), and The intermediate component (5) has the overflow opening (4).
7. A pump according to any one of claims 1 to 6, The pump in this case pumps two different media.
8. A pump according to any one of claims 1 to 7, The pump further comprises a motor (7), The motor (7) has two directions of rotation, and According to the rotation direction of the motor (7), one of the two medium passages (3) is used as a medium inlet or a medium outlet, and the other of the two medium passages (3) is used as a medium outlet or a medium inlet.