An adjustable heat exchanger for high-power diesel engines

Abstract

The present invention provides an adjustable heat exchanger for a high-power diesel engine, comprising a heat exchanger shell and a heat exchanger core arranged therein, an adjusting shaft, a lower adjusting valve plate, an upper adjusting valve plate, a heat exchanger high-temperature gas circulation area, and a heat exchanger coolant circulation area, wherein the adjusting shaft is used to adjust the positions of the lower adjusting valve plate and the upper adjusting valve plate to control the amount of heat exchange. The adjustable heat exchanger for a high-power diesel engine described in the present invention matches the heat exchange area suitable for plateau areas and plain areas by adjusting the position and diameter of the valve plate, meets the heat exchange requirements of the high-power diesel engine in a plateau environment, and achieves the same heat dissipation in a plateau environment and a plain environment under the same cooling conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of high-power diesel engines, and in particular relates to an adjustable heat exchanger for high-power diesel engines. Background Art

[0002] Modern high-power diesel engines generally use turbocharging technology to improve the power performance of diesel engines. The performance of the radiator directly affects the overall performance of the entire system and is an indispensable part of the normal operation of high-power diesel engines. The working principle of the heat exchanger: hot air and coolant for cooling enter the heat exchanger core through the inlet and outlet, and are distributed to the heat exchange units at each layer through the internal heat exchange channel. The air and coolant heat exchange units are separated by a partition, and the hot air exchanges heat with the partition, and the heat is taken away by the coolant on the other side of the partition. During the heat exchange process, the air temperature decreases and the coolant temperature increases. Under given working conditions (fluid flow, inlet and outlet temperatures, etc.), the required heat transfer and fluid outlet temperature are achieved; the requirements for external dimensions and weight are met, and the volume and weight are as small as possible; safe and reliable; the manufacturing process is feasible; installation, transportation and maintenance are convenient, etc.; countercurrent or cross-flow structures are used as much as possible to improve heat exchange performance. In view of the problem that the air pressure in plateau areas is reduced, the air intake is reduced, and the heat dissipation is smaller than that in plain areas under the same cooling conditions. Summary of the invention

[0003] In view of this, the present invention aims to propose an adjustable heat exchanger for a high-power diesel engine to meet the heat exchange needs of the high-power diesel engine in a plateau environment, and to achieve the same heat dissipation in a plateau environment and a plain environment under the same cooling conditions.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] An adjustable heat exchanger for a high-power diesel engine comprises a heat exchanger shell and a heat exchanger core arranged inside thereof, an adjusting shaft, a lower adjusting valve plate, an upper adjusting valve plate, a high-temperature gas circulation area of ​​the heat exchanger, and a coolant circulation area of ​​the heat exchanger. The adjusting shaft is used to adjust the positions of the lower adjusting valve plate and the upper adjusting valve plate to control the amount of heat exchange.

[0006] Furthermore, an air inlet cavity and an air outlet cavity are provided inside the heat exchanger shell, and a plurality of high-temperature gas channels are provided inside the heat exchanger core. The air inlet cavity, the plurality of high-temperature gas channels and the air outlet cavity together constitute the high-temperature gas circulation area of ​​the heat exchanger.

[0007] Furthermore, a water inlet pipe and a water outlet pipe are provided inside the heat exchanger shell, a coolant flow channel is provided inside the heat exchanger core, and the water inlet pipe, the coolant flow channel and the water outlet pipe together constitute the coolant circulation area of ​​the heat exchanger.

[0008] Furthermore, the adjustment shaft is arranged in the air intake cavity.

[0009] Furthermore, there are three types of position adjustments for the lower regulating valve plate and the upper regulating valve plate: the first type is that both the lower regulating valve plate and the upper regulating valve plate are located at the center of the heat exchanger, and the angle between the two is 0°, so that the high-temperature gas can completely pass through the heat exchanger core; the second type is that one of the lower regulating valve plate or the upper regulating valve plate is located at the center of the heat exchanger, and the other regulating valve plate is close to the heat exchanger core, and the angle between the two is 90°, so that the high-temperature gas passes through part of the heat exchanger core; the third type is that both the lower regulating valve plate and the upper regulating valve plate are close to the heat exchanger core, and the angle between the two is 180°, so that the high-temperature gas passes through the heat exchanger core outside the regulating valve plate.

[0010] Furthermore, the lower regulating valve plate and the upper regulating valve plate are both semicircular plates with a diameter of D.

[0011] Furthermore, the air inlet cavity is provided with an air inlet temperature sensor installation position e, and the air outlet cavity is provided with an air outlet temperature sensor installation position f, which are used to measure the high temperature gas temperature difference ΔT q .

[0012] Furthermore, the water inlet pipe is provided with a water inlet temperature sensor installation position g, and the water outlet pipe is provided with a water outlet temperature sensor installation position h, which is used to measure the coolant temperature difference ΔT s .

[0013] Furthermore, under the same cooling conditions, the air pressure in the plateau area is lower than that in the plain area, the air intake volume is reduced, and the area where the high-temperature gas passes through the heat exchanger core is increased, so that the heat dissipation in the plateau environment and the plain environment can be the same.

[0014] Compared with the prior art, the adjustable heat exchanger for a high-power diesel engine described in the present invention has the following advantages:

[0015] (1) The adjustable heat exchanger for a high-power diesel engine described in the present invention can match the heat exchange area suitable for plateau areas and plain areas by adjusting the position and diameter of the valve plate, thereby meeting the heat exchange requirements of the high-power diesel engine in a plateau environment and achieving the same heat dissipation in a plateau environment and a plain environment under the same cooling conditions.

[0016] (2) The adjustable heat exchanger for a high-power diesel engine described in the present invention has an adjusting device arranged in the air intake cavity, which has a compact structure and high space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0018] Figure 1It is a cross-sectional view of an adjustable heat exchanger for a high-power diesel engine according to an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the first adjustment position of the lower adjustment valve plate and the upper adjustment valve plate according to an embodiment of the present invention;

[0020] Figure 3 It is a schematic diagram of the second adjustment position of the lower adjustment valve plate and the upper adjustment valve plate according to the embodiment of the present invention;

[0021] Figure 4 It is a schematic diagram of the third adjustment position of the lower regulating valve plate and the upper regulating valve plate according to an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1-heat exchanger core, 2-heat exchanger shell, 3-air outlet cavity, 4-water inlet pipe, 5-adjusting shaft, 6-lower adjusting valve plate, 7-upper adjusting valve plate, 8-air inlet cavity, 9-water outlet pipe, a-heat exchanger air inlet, b-heat exchanger air outlet, c-heat exchanger water inlet, d-heat exchanger water outlet, e-inlet air temperature sensor installation position, f-outlet air temperature sensor installation position, g-water inlet temperature sensor installation position, h-water outlet temperature sensor installation position. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0028] An adjustable heat exchanger for a high-power diesel engine, such as Figures 1 to 4 As shown, it includes a heat exchanger shell 2 and a heat exchanger core 1 arranged inside thereof, an adjusting shaft 5, a lower adjusting valve plate 6, an upper adjusting valve plate 7, a heat exchanger high-temperature gas circulation area, and a heat exchanger coolant circulation area. The adjusting shaft 5 is used to adjust the positions of the lower adjusting valve plate 6 and the upper adjusting valve plate 7 to control the amount of heat exchange.

[0029] The heat exchanger shell 2 is further provided with an air inlet cavity 8 and an air outlet cavity 3, and the heat exchanger core 1 is provided with a plurality of high-temperature gas channels. The air inlet cavity 8, the plurality of high-temperature gas channels and the air outlet cavity 3 together constitute the high-temperature gas circulation area of ​​the heat exchanger.

[0030] A water inlet pipe 4 and a water outlet pipe 9 are also provided inside the heat exchanger shell 2, and a coolant flow channel is provided inside the heat exchanger core 1. The water inlet pipe 4, the coolant flow channel and the water outlet pipe 9 together constitute the coolant circulation area of ​​the heat exchanger.

[0031] The adjusting shaft 5 is arranged in the air inlet chamber 8 .

[0032] There are three ways to adjust the position of the lower regulating valve plate 6 and the upper regulating valve plate 7:

[0033] The first type is that the lower regulating valve plate 6 and the upper regulating valve plate 7 are both located at the center of the heat exchanger, and the angle between the two is 0°, so that the high-temperature gas can completely pass through the heat exchanger core 1. Figure 2 ;

[0034] The second type is that one of the lower regulating valve plate 6 or the upper regulating valve plate 7 is located at the center of the heat exchanger, and the other regulating valve plate is close to the heat exchanger core 1, and the angle between the two is 90°. The high-temperature gas passes through part of the heat exchanger core, as shown in the attached Figure 3 ;

[0035] The third type is that the lower regulating valve plate 6 and the upper regulating valve plate 7 are both close to the heat exchanger core 1, and the angle between the two is 180 degrees. The high-temperature gas passes through the regulating valve plate to block the heat exchanger core outside. Figure 4 .

[0036] The lower regulating valve plate 6 and the upper regulating valve plate 7 are semicircles with a diameter of D. The inlet cavity 8 is provided with an inlet temperature sensor installation position e, and the outlet cavity 3 is provided with an outlet temperature sensor installation position f, which measures the high temperature gas temperature difference ΔT q The water inlet pipe 4 is provided with a water inlet temperature sensor installation position g, and the water outlet pipe 9 is provided with a water outlet temperature sensor installation position h, which measures the coolant temperature difference ΔT s .

[0037] Under the same cooling conditions, the air pressure in plateau areas is lower than that in plain areas, and the air intake volume is reduced. Increasing the area where high-temperature gas passes through the heat exchanger core can achieve the same heat dissipation in plateau and plain environments.

[0038] The relationship between valve plate diameter D and heat dissipation Q is sought through experimental methods:

[0039] D=f(Q)

[0040] The working principle of an adjustable heat exchanger for a high-power diesel engine is:

[0041] According to different heat dissipation requirements, the diameters of the lower regulating valve plate 6 and the upper regulating valve plate 7 are determined to be D.

[0042] In plain areas, high-temperature gas passes through the heat exchanger air inlet a and enters the heat exchanger air inlet cavity 8. An adjustment shaft 5 is provided in the air inlet cavity 8. The adjustment shaft 5 adjusts the lower adjustment valve plate 6 and the upper adjustment valve plate 7 to an angle of 180°, close to the heat exchanger core 1. Figure 3 The high-temperature gas enters the heat exchanger core 1 outside the regulating valve plate to be cooled, and then flows out of the heat exchanger outlet b through the intercooler outlet cavity 3. The coolant passes through the heat exchanger water inlet c, enters the heat exchanger core 1 through the water inlet pipe 4 to cool the high-temperature gas, and then flows through the water outlet pipe 9 and flows out of the heat exchanger outlet d.

[0043] In plateau areas, high-temperature gas passes through the heat exchanger inlet a, and the adjusting shaft 5 adjusts the lower regulating valve plate 6 and the upper regulating valve plate 7 to an angle of 0°, both of which are located at the center of the heat exchanger. The high-temperature gas can completely pass through the heat exchanger core. Figure 1 The volume of high-temperature gas is small, but by increasing the area of ​​the heat exchanger, the same heat dissipation as in the plain area can be achieved.

[0044] At a certain altitude, high-temperature gas passes through the heat exchanger air inlet a, and the adjusting shaft 5 adjusts the lower regulating valve plate 6 or the upper regulating valve plate 7 to the center of the heat exchanger, and the other regulating valve plate is close to the heat exchanger core 1, with an angle of 90°. Figure 2 The high-temperature gas passes through part of the heat exchanger core. The amount of high-temperature gas is small, but the area passing through the heat exchanger is larger than that in the plains, and the same heat dissipation as in the plains can be achieved.

[0045] The adjustable heat exchanger for a high-power diesel engine can match the heat exchange area suitable for plateau areas and plain areas by adjusting the position and diameter of the valve plate, thereby meeting the heat exchange needs of the high-power diesel engine in a plateau environment. Under the same cooling conditions, the heat dissipation in a plateau environment and a plain environment is the same, and an adjustment device is arranged in the air inlet cavity of the radiator, with a compact structure and high space utilization.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable heat exchanger for a high-power diesel engine, characterized in that: It includes a heat exchanger shell and a heat exchanger core, an adjusting shaft, a lower adjusting valve plate, an upper adjusting valve plate, a high-temperature gas circulation area of ​​the heat exchanger, and a coolant circulation area of ​​the heat exchanger. The adjusting shaft is used to adjust the positions of the lower adjusting valve plate and the upper adjusting valve plate to control the amount of heat exchange.

2. The adjustable heat exchanger for a high-power diesel engine according to claim 1, characterized in that: An air inlet cavity and an air outlet cavity are also provided inside the heat exchanger shell, and a plurality of high-temperature gas channels are provided inside the heat exchanger core. The air inlet cavity, the plurality of high-temperature gas channels and the air outlet cavity together constitute the high-temperature gas circulation area of ​​the heat exchanger.

3. The adjustable heat exchanger for a high-power diesel engine according to claim 1, characterized in that: A water inlet pipe and a water outlet pipe are also provided inside the heat exchanger shell, and a coolant flow channel is provided inside the heat exchanger core. The water inlet pipe, the coolant flow channel and the water outlet pipe together constitute the coolant circulation area of ​​the heat exchanger.

4. The adjustable heat exchanger for a high-power diesel engine according to claim 2, characterized in that: The adjusting shaft is arranged in the air intake cavity.

5. The adjustable heat exchanger for a high-power diesel engine according to claim 1, characterized in that: There are three ways to adjust the position of the lower regulating valve plate and the upper regulating valve plate: the first one is that both the lower regulating valve plate and the upper regulating valve plate are located at the center of the heat exchanger, and the angle between the two is 0°, so that the high-temperature gas can completely pass through the heat exchanger core; the second one is that one of the lower regulating valve plate or the upper regulating valve plate is located at the center of the heat exchanger, and the other regulating valve plate is close to the heat exchanger core, and the angle between the two is 90°, so that the high-temperature gas passes through part of the heat exchanger core; the third one is that both the lower regulating valve plate and the upper regulating valve plate are close to the heat exchanger core, and the angle between the two is 180°, so that the high-temperature gas passes through the heat exchanger core outside the regulating valve plate.

6. The adjustable heat exchanger for a high-power diesel engine according to claim 1, characterized in that: The lower regulating valve plate and the upper regulating valve plate are both semicircular plates with a diameter of D.

7. The adjustable heat exchanger for a high-power diesel engine according to claim 2, characterized in that: The air inlet cavity is provided with an air inlet temperature sensor installation position e, and the air outlet cavity is provided with an air outlet temperature sensor installation position f, which are used to measure the high temperature gas temperature difference ΔT q .

8. The adjustable heat exchanger for a high-power diesel engine according to claim 3, characterized in that: The water inlet pipe is provided with a water inlet temperature sensor installation position g, and the water outlet pipe is provided with a water outlet temperature sensor installation position h, which is used to measure the coolant temperature difference ΔT s .

9. The adjustable heat exchanger for a high-power diesel engine according to claim 1, characterized in that: Under the same cooling conditions, the air pressure in the plateau area is lower than that in the plain area, the air intake volume is reduced, and the area where the high-temperature gas passes through the heat exchanger core is increased, which can achieve the same heat dissipation in the plateau environment and the plain environment.

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