A cooler with a single-sided flow channel

Abstract

The present invention discloses a cooler with a single-sided flow channel, belonging to the field of heat exchange; the device includes a cover plate, and the cover plate includes a first cover plate and a second cover plate arranged at both ends. A plurality of working fluid plates and a plurality of cooling medium plates are arranged axially inside the cover plate. A working fluid flow channel and a cooling medium flow channel are arranged on one side of the plate body, and the working fluid flow channel and the cooling medium flow channel are arranged in a cross manner; for the cooler with a single-sided flow channel of the invention, in the structural design, the way of opening flow channels on a single side of the plate body is adopted. Compared with the prior structure with a double-sided flow channel structural design, it can effectively reduce the processing precision requirements of the plate body and the flow channel. Especially during the assembly process, there is no need to consider the problem of misalignment of the flow channel assembly or the connection of the flow channels caused by unqualified processing precision requirements. Thus, on the basis of effectively ensuring the cooling effect, the processing precision requirements are further reduced.

Description

Technical Field

[0001] The present invention relates to a cooler with a single-side flow channel and belongs to the field of heat exchange. Background Art

[0002] A compressor is a power-consuming device. The inlet temperature of the impeller has a great influence on the power consumption of the unit. To improve the efficiency of the compressor, inter-stage cooling is often adopted to reduce the inlet temperature of the latter stages of the compressor, thereby reducing the compression power consumption of the latter stages and achieving the purpose of improving the compressor efficiency. To cool the working medium of the former stages, currently, a volute is mainly arranged at the outlet of the former stages to lead out the working medium from the steam turbine unit, and it is connected to the cooler through a pipeline outside, and then reconnected to the inlet of the latter stages of the unit through a pipeline after cooling. Since this form needs to lead out from the former stages of the unit, an additional exhaust volute needs to be set, or a split-shaft or sectional arrangement is adopted, so the volume of the unit is increased. At the same time, due to the increase in external pipelines, the loss of the working medium increases.

[0003] For a cantilever-type unit with a small number of stages, such as a two-stage cantilever, due to the compact structure of the unit, if the volute is used to lead out and cool the exhaust gas at the first stage, the volume of the unit will inevitably increase. At the same time, if the volute is used to lead out the exhaust gas at the first stage, the cantilever amount will increase, resulting in safety problems of the unit. Summary of the Invention

[0004] The object of the present invention is to provide a cooler with a single-side flow channel for the problems mentioned above. The cooler can be arranged between the stages of a multi-stage centrifugal compressor to replace the traditional return device, cool the working medium during the flow process, and thus achieve the purpose of reducing the inlet temperature of the latter stage and reducing the compression power consumption.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A cooler with a single-side flow channel includes a cover plate, and the cover plate includes a first cover plate and a second cover plate arranged at both ends. A plurality of working medium plates and a plurality of cooling medium plates are arranged axially inside the cover plate;

[0007] The working medium plates and the cooling medium plates are arranged in a cross manner, and one end is set as a working medium plate, and the other end is a cooling medium plate. A cooling medium side plate is also arranged between the working medium plate at the end and the second cover plate, and a working medium side plate is also arranged between the cooling medium plate at the end and the first cover plate;

[0008] The first cover plate, the working medium side plate, the working medium plate body, the cooling medium plate body, the cooling medium side plate and the second cover plate are fixedly assembled. The side surfaces of the working medium side plate and the working medium plate body facing the first cover plate are processed with working medium flow channels, and the side surfaces of the cooling medium side plate and the cooling medium plate body facing the first cover plate are processed with cooling medium flow channels. After being assembled and fixed, the working medium flow channels and the cooling medium flow channels are arranged in a cross pattern and are of a sealed structure;

[0009] On the upper parts of the working medium side plate, the working medium plate body and the cooling medium plate body, there are a working medium side through groove and a working medium side outlet that communicate with the working medium flow channels. The working medium enters the working medium side through groove through the working medium side inlet;

[0010] On the upper parts of the working medium plate body, the cooling medium plate body and the cooling medium side plate, there is a cooling medium side inlet through groove that communicates with the cooling medium flow channels, and a cooling medium discharge mechanism is arranged at its lower part. The cooling medium enters the cooling medium side inlet through groove through the cooling medium side inlet.

[0011] Further, the cooling medium discharge mechanism includes a cooling medium side outlet through groove arranged on the working medium plate body, the cooling medium plate body and the cooling medium side plate, a cooling medium side annular cavity communicated with the cooling medium side outlet through groove, and a radial channel communicated with the cooling medium side change cavity, and flows through the radial channel to the cooling medium side outlet and is discharged.

[0012] Further, the radial channel is arranged inside the second cover plate, and the cooling medium side outlet is arranged at the top of the second cover plate and is communicated with the radial channel.

[0013] Further, one side surface of the working medium plate body is provided with a working medium flow channel, and a working medium side through groove and a cooling medium side inlet through groove are staggeredly arranged through it at the upper part. The working medium side through groove is communicated with the inlet of the working medium flow channel, and the outlet of the working medium flow channel is communicated with the working medium side outlet.

[0014] Further, one side of the working medium side plate is provided with a working medium flow channel, and a working medium side through groove is arranged through it at the upper part. The working medium side through groove is communicated with the inlet of the working medium flow channel, and the outlet of the working medium flow channel is communicated with the working medium side outlet.

[0015] Further, one side surface of the cooling medium plate body is provided with a cooling medium flow channel, and a working medium side through groove and a cooling medium side inlet through groove are staggeredly arranged through it at the upper part. The cooling medium side inlet through groove is communicated with the inlet of the cooling medium flow channel, and the outlet of the cooling medium flow channel is communicated with the cooling medium discharge mechanism.

[0016] Further, one side of the cooling medium side plate is provided with a cooling medium flow channel, and a cooling medium side inlet through groove is arranged through it at the upper part. The cooling medium side inlet through groove is communicated with the inlet of the cooling medium flow channel, and the outlet of the cooling medium flow channel is communicated with the cooling medium discharge mechanism.

[0017] Furthermore, the sides of the first cover plate, the second cover plate, the working medium side plate, the working medium plate body, the cooling medium plate body, and the cooling medium side plate are polygonal or circular.

[0018] Furthermore, the working medium flow channel and / or the cooling medium channel is one or a combination of more than one of a spiral shape, a bent flow channel, a rectangular broken line flow channel, a straight flow channel, a curved flow channel, a broken line flow channel, or an arc segmented flow channel.

[0019] Furthermore, the first cover plate, the working medium side plate, the working medium plate body, the cooling medium plate body, the cooling medium side plate, and the second cover plate are tightly connected by welding or bonding.

[0020] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0021] 1. For a cooler with a single-sided flow channel of the present invention, in the structural design, a method of opening a flow channel on a single side of the plate body is adopted. Compared with the prior structure with a double-sided flow channel design, the specific structural design can effectively reduce the processing precision requirements of the plate body and the flow channel. Especially during the assembly process, there is no need to consider the problem of flow channel assembly misalignment or flow channel communication caused by unqualified processing precision requirements. Thus, on the basis of effectively ensuring the cooling effect, the processing precision requirements are further reduced;

[0022] 2. A cooler with a single-sided flow channel of the present invention can cool the working medium after the previous stage of compression, thereby reducing the inlet temperature of the subsequent stage, reducing the power consumption of the subsequent stage compressor, and improving the efficiency of the unit. At the same time, by adopting a single-sided processing of multiple spiral grooves, the heat exchange area of the cooler can be effectively increased, and the volume of the cooler can be reduced;

[0023] 3. A cooler with a single-sided flow channel of the present invention adopts a plate body structure design, making the overall volume of the entire cooler more compact and more convenient for axial installation and positioning. When the cooler is directly arranged between two stages, the original refluxer space is effectively utilized. Compared with a unit using an external intercooler, the size of the unit body does not change much. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be described by way of examples with reference to the accompanying drawings, where:

[0025] Figure 1 is a schematic structural diagram of the present invention;

[0026] Figure 2 is a schematic structural diagram of the side view of the present invention;

[0027] Figure 3 is a schematic structural diagram of the working medium flow channel on the working medium plate body;

[0028] Figure 4 It is a schematic diagram of the cooling medium flow channel structure on the cooling medium plate body;

[0029] Figure 5 It is a single spiral combined broken line flow channel;

[0030] Figure 6 It is a schematic diagram of a rectangular broken line flow channel.

[0031] Markings in the figure: 1 - First cover plate, 2 - Working medium side plate, 3 - Cooling medium plate body, 4 - Cooling medium side plate, 5 - Second cover plate, 6 - Working medium plate body, a - Working medium side inlet, b - Working medium side through groove, c - Working medium side outlet, d - Cooling medium side inlet, e - Cooling medium side inlet through groove, f - Cooling medium side outlet through groove, g - Radial channel, h - Cooling medium side outlet, i - Working medium flow channel, j - Cooling medium flow channel, k - Cooling medium side annular cavity. Specific implementation manners

[0032] All features disclosed in this specification, or steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can be combined in any way.

[0033] Any feature disclosed in this specification, unless specifically described, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically described, each feature is only an example in a series of equivalent or similar features.

[0034] Embodiment 1

[0035] A cooler with a single-sided flow channel, as Figures 1 to 6 shown, includes a cover plate. The cover plate includes a first cover plate 1 and a second cover plate 5 provided at both ends. Inside the cover plate, a plurality of working medium plate bodies 6 and a plurality of cooling medium plate bodies 3 are arranged axially;

[0036] The working medium plate bodies 6 and the cooling medium plate bodies 3 are arranged crosswise (layered alternately), and one end is a working medium plate body 6, and the other end is a cooling medium plate body 3. A cooling medium side plate 4 is also provided between the working medium plate body 6 at the end and the second cover plate 5, and a working medium side plate 2 is also provided between the cooling medium plate body 3 at the end and the first cover plate;

[0037] The first cover plate 1, the working medium side plate 2, the working medium plate bodies 6, the cooling medium plate bodies 3, the cooling medium side plate 4, and the second cover plate 5 are fixedly assembled. The working medium side plate 6 and the side surface of the working medium plate bodies 6 facing the first cover plate 1 are machined with a working medium flow channel i, and the side surface of the cooling medium side plate 4 and the cooling medium plate bodies 3 facing the first cover plate 1 are machined with a cooling medium flow channel j. After assembly and fixation, the working medium flow channel i and the cooling medium flow channel j are arranged crosswise and are a sealed structure;

[0038] On the upper parts of the working fluid side plate 2, the working fluid plate body 6, and the cooling medium plate body 3, there are provided a working fluid side through groove b and a working fluid side outlet a that communicate with the working fluid flow channel i, and the working fluid enters the working fluid side through groove b through the working fluid side inlet a;

[0039] On the upper parts of the working fluid plate body 6, the cooling medium plate body 3, and the cooling medium side plate 4, there is provided a cooling medium side inlet through groove f that communicates with the cooling medium flow channel j, and a cooling medium discharge mechanism is provided at its lower part. The cooling medium enters the cooling medium side inlet through groove e through the cooling medium side inlet d.

[0040] In this embodiment, as a specific design, different from the traditional structural design, in this design, a single-sided machining of the working fluid flow channel and the cooling medium flow channel is adopted to avoid the situation of channel misalignment caused by machining accuracy problems during assembly. At the same time, for the structure, it is simpler, the machining is fast, and the assembly efficiency is high. In particular, it should be noted that the use of the structural design of the plate body better realizes the miniaturization of the entire volume. As a more specific illustration, the working fluid flow channel and / or the cooling medium flow channel can be a semi-circular arc groove or a rectangular groove. For the requirements, they are relatively lower. Only by sealing and fixedly assembling the plate body can the sealing of the overall flow channel be completed, and its assembly efficiency is higher and the processing cost is more economical.

[0041] Based on the above specific design mechanism, as a more specific design, the cooling medium discharge mechanism includes a cooling medium side outlet through groove f provided on the working fluid plate body 6, the cooling medium plate body 3, and the cooling medium side plate 4, a cooling medium side annular cavity k communicating with the cooling medium side outlet through groove f, and a radial channel g communicating with the cooling medium side changing cavity. It flows through the radial channel g to the cooling medium side outlet h and is discharged. In the design of this structure, its main design purpose is to realize the recovery and recycling of the cooling medium. At the same time, it is also considered that different positions are designed for the discharge port to avoid relative interference.

[0042] Based on the design of the above specific structure, as a more optimized design, the radial channel g is provided inside the second cover plate 5, and the cooling medium side outlet h is provided at the top of the second cover plate 5 and communicates with the radial channel g. In the specific structural design, it can also be considered to be provided between the cooling medium side plate and the second cover plate. However, considering the sealing effect of the cooling medium discharge, it is provided inside the second cover plate. More specifically, the second cover plate includes a plug plate located on the inner side and a sealing plate located on the outer side, and the radial channel g is provided between the plug plate and the sealing plate.

[0043] As a more specific design, in the design of another specific implementation manner, in combination with Figure 3 and Figure 4 's design, the specific design is as follows:

[0044] On one side of the working fluid plate body 6, a working fluid flow channel i is provided, and a working fluid side through groove b and a cooling medium side inlet through groove e are staggeredly penetrated through the upper part thereof. The working fluid side through groove b is communicated with the inlet of the working fluid flow channel i, and the outlet of the working fluid flow channel i is communicated with the working fluid side outlet c. In the design of this structure, on the one hand, the flow effect of the cooling medium side inlet through groove is considered, and at the same time, the effect between the working fluid side through groove and the working fluid flow channel is considered, so a staggered design is adopted.

[0045] Similarly, a similar structural design is also provided on the cooling medium plate body. On one side of the cooling medium plate body 3, a cooling medium flow channel j is provided, and a working fluid side through groove b and a cooling medium side inlet through groove e are staggeredly penetrated through the upper part thereof. The cooling medium side inlet through groove e is communicated with the inlet of the cooling medium flow channel j, and the outlet of the cooling medium flow channel j is communicated with the cooling medium discharge mechanism. Further, the outlet of the cooling medium flow channel j is communicated with the cooling medium side outlet through groove f.

[0046] Considering that there is only one flow channel in the design of the two side plates and there are no other opposite flow channels on the other side, for further design, a working fluid flow channel i is provided on one side of the working fluid side plate 2, and a working fluid side through groove b is penetrated through the upper part thereof. The working fluid side through groove b is communicated with the inlet of the working fluid flow channel i, and the outlet of the working fluid flow channel i is communicated with the working fluid side outlet c.

[0047] On one side of the cooling medium side plate 4, a cooling medium flow channel j is provided, and a cooling medium side inlet through groove e is penetrated through the upper part thereof. The cooling medium side inlet through groove e is communicated with the inlet of the cooling medium flow channel j, and the outlet of the cooling medium flow channel j is communicated with the cooling medium discharge mechanism. Further, the outlet of the cooling medium flow channel j is communicated with the cooling medium side outlet through groove f.

[0048] In the design of the structure, as Figure 5 and Figure 6 shown, the working fluid flow channel i or / and the cooling medium channel j is one or a combination of a spiral shape, a bent flow channel, a rectangular broken line flow channel, a straight flow channel, a curved flow channel, a broken line flow channel or an arc segmented flow channel. Considering processing, more specifically, the working fluid flow channel and the cooling medium channel are spiral. The spiral lines of the working fluid side flow channel and the cooling medium side flow channel are not limited to rotating 360°, and according to the structural arrangement, they can be set at any angle, such as 90°, 45°, etc. and smaller angles, or 540°, 720°, etc. and larger angles.

[0049] Further, the first cover plate, the working fluid side plate, the working fluid plate body, the cooling medium plate body, the cooling medium side plate and the second cover plate are firmly connected by welding or bonding so that each plate body is fastened.

[0050] More specifically, the medium on the cooling medium side is not limited to water, and Freon, organic cooling gas, air, or other liquid or gaseous cooling media can also be used, or the working medium can be directly used.

[0051] In the above specific structural design, the specific working principle is as follows: The working medium enters the cooler from the working medium side inlet, and is distributed to the corresponding working medium flow channels between the plates through the working medium side through grooves. After the working medium exchanges heat with the cooling medium through the working medium flow channels, the temperature decreases and is discharged from the working medium side outlet of the cooler.

[0052] The cooling medium enters the cooler from the cooling medium side inlet, and is distributed to the corresponding cooling medium flow channels between the cooling medium plates through the cooling medium side through grooves. After the cooling medium exchanges heat with the working medium through the cooling medium flow channels, the temperature increases, flows into the cooling medium side outlet through groove, and uniformly flows into the cooling medium side annular cavity along the axial direction. After mixing in the cooling medium side annular cavity, it flows radially through the cooling medium side outlet radial channel and is discharged from the cooling medium side outlet of the cooler.

[0053] To ensure the relative independence of the working medium side and the cooling medium side, the working medium end plate needs to block or not process the cooling medium side inlet through groove and the cooling medium side outlet through groove, and the cooling medium side end plate needs to block or not process the working medium side through groove.

[0054] Further, for the cooling medium side inlet and the cooling medium side outlet, the working medium can also enter from the cooling medium side outlet and the cooling medium inlet can flow out, so as to form a countercurrent arrangement of the cooling medium and the working medium.

[0055] To sum up:

[0056] 1. For a cooler with a single-sided flow channel of the present invention, in terms of structural design, the method of opening flow channels on a single side of the plate body is adopted. Compared with the prior structure with a double-sided flow channel structural design, the specific structural design can effectively reduce the processing accuracy requirements of the plate body and the flow channels. Especially during the assembly process, there is no need to consider the problem of misalignment of the flow channel assembly or the connection of the flow channels caused by unqualified processing accuracy requirements. Thus, on the basis of effectively ensuring the cooling effect, the processing accuracy requirements are further reduced;

[0057] 2. A cooler with a single-sided flow channel of the present invention can cool the working medium after pre-stage compression, thereby reducing the temperature at the inlet of the subsequent stage, reducing the power consumption of the subsequent stage compressor, and improving the efficiency of the unit. At the same time, by adopting a single-sided processing of multiple spiral grooves, the heat transfer area of the cooler can be effectively increased and the volume of the cooler can be reduced;

[0058] 3. A cooler with a single-sided flow channel according to the present invention adopts a plate structure design, making the overall volume of the entire cooler more compact and facilitating axial installation and positioning. When the cooler is directly arranged between two stages, the original refluxer space can be effectively utilized. Compared with the unit using an external intercooler, the size of the unit body does not change much. The present invention is not limited to the foregoing specific embodiments. The present invention extends to any new feature or any new combination disclosed in this specification, as well as any new method or process step or any new combination disclosed.

Claims

1. A cooler with a single-sided flow channel, characterized in that: It includes a cover plate, and the cover plate includes a first cover plate and a second cover plate disposed at both ends. A plurality of working fluid plates and a plurality of cooling medium plates are axially arranged on the inner side of the cover plate; The working fluid plates and the cooling medium plates are arranged in a cross manner, and one end is set as a working fluid plate, and the other end is a cooling medium plate. A cooling medium side plate is also arranged between the end working fluid plate and the second cover plate, and a working fluid side plate is also arranged between the end cooling medium plate and the first cover plate; The first cover plate, the working fluid side plate, the working fluid plates, the cooling medium plates, the cooling medium side plate and the second cover plate are fixedly assembled. The sides of the working fluid side plate and the working fluid plates facing the first cover plate are processed with working fluid channels, and the sides of the cooling medium side plate and the cooling medium plates facing the first cover plate are processed with cooling medium channels. After assembly and fixation, the working fluid channels and the cooling medium channels are arranged in a cross manner and are of a sealed structure; On the upper part of the working fluid side plate, the working fluid plates and the cooling medium plates, there are provided a working fluid side through groove and a working fluid side outlet communicating with the working fluid channel, and the working fluid enters the working fluid side through groove through the working fluid side inlet; On the upper part of the working fluid plates, the cooling medium plates and the cooling medium side plate, there is provided a cooling medium side inlet through groove communicating with the cooling medium channel, and a cooling medium discharging mechanism is arranged at its lower part, and the cooling medium enters the cooling medium side inlet through groove through the cooling medium side inlet; The cooling medium discharging mechanism includes a cooling medium side outlet through groove arranged on the working fluid plates, the cooling medium plates and the cooling medium side plate, a cooling medium side annular cavity communicating with the cooling medium side outlet through groove, and a radial channel communicating with the cooling medium side changing cavity, and flows to the cooling medium side outlet through the radial channel and is discharged; The radial channel is arranged inside the second cover plate, and the cooling medium side outlet is arranged at the top of the second cover plate and is communicated with the radial channel.

2. The cooler with a single-sided flow channel according to claim 1, characterized in that: One side of the working fluid plate is provided with a working fluid channel, and a working fluid side through groove and a cooling medium side inlet through groove are staggeredly penetrated through its upper part. The working fluid side through groove is communicated with the inlet of the working fluid channel, and the outlet of the working fluid channel is communicated with the working fluid side outlet.

3. The cooler with a single-side flow channel according to claim 1, characterized in that: One side of the working fluid side plate is provided with a working fluid channel, and a working fluid side through groove is penetrated through its upper part. The working fluid side through groove is communicated with the inlet of the working fluid channel, and the outlet of the working fluid channel is communicated with the working fluid side outlet.

4. The cooler with a single-sided flow channel according to claim 1, characterized in that: One side of the cooling medium plate is provided with a cooling medium channel, and a working fluid side through groove and a cooling medium side inlet through groove are staggeredly penetrated through its upper part. The cooling medium side inlet through groove is communicated with the inlet of the cooling medium channel, and the outlet of the cooling medium channel is communicated with the cooling medium discharging mechanism.

5. The cooler with a single-sided flow channel according to claim 1, characterized in that: One side of the cooling medium side plate is provided with a cooling medium channel, and a cooling medium side inlet through groove is penetrated through its upper part. The cooling medium side inlet through groove is communicated with the inlet of the cooling medium channel, and the outlet of the cooling medium channel is communicated with the cooling medium discharging mechanism.

6. The cooler with a single-side flow channel according to claim 1, characterized in that: The sides of the first cover plate, the second cover plate, the working fluid side plate, the working fluid plates, the cooling medium plates and the cooling medium side plate are polygonal or circular.

7. The cooler with a single-sided flow channel according to claim 1, characterized in that: The working fluid flow channel and / or the cooling medium channel is one or a combination of a spiral shape, a bent flow channel, a rectangular broken line flow channel, a straight flow channel, a curved flow channel, a broken line flow channel, or an arc segmented flow channel.

8. The cooler with a single-sided flow channel according to claim 1, characterized in that: The first cover plate, the working fluid side plate, the working fluid plate body, the cooling medium plate body, the cooling medium side plate, and the second cover plate are firmly connected by welding or bonding.

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