阅读说明：本技术 可变冷却效率的冷却器 (Cooler with variable cooling efficiency ) 是由 施爱峰 于 2019-12-27 设计创作，主要内容包括：本发明公开了一种可变冷却效率的冷却器,包括壳体,所述壳体的右端盖设有凸缘形盖板,壳体的左端设置有进气管和出气管；所述壳体的内壁上竖向间隔设置有两个固定板,位于右侧的固定板与凸缘形盖板之间形成废气暂存腔体,两固定板与壳体内壁之间围设成冷却水腔体,壳体的上下两端分别设置有出水管和进水管；两固定板之间从下而上依次可拆卸连接有初步降温结构以及二次降温结构,初步降温结构的左端与进气管相连通,二次降温结构的左端与出气管相连通,初步降温结构的右端和二次降温结构的右端分别与废气暂存腔体相连通。本发明在不改变生产冷却器模具的情况下,通过更换内管、翅片和通气直管,能够实现对冷却效率的调节。(The invention discloses a cooler with variable cooling efficiency, which comprises a shell, wherein a flange-shaped cover plate is arranged at the right end cover of the shell, and an air inlet pipe and an air outlet pipe are arranged at the left end of the shell; two fixing plates are vertically arranged on the inner wall of the shell at intervals, a waste gas temporary storage cavity is formed between the fixing plate on the right side and the flange-shaped cover plate, a cooling water cavity is enclosed between the two fixing plates and the inner wall of the shell, and a water outlet pipe and a water inlet pipe are respectively arranged at the upper end and the lower end of the shell; can dismantle in proper order from down between two fixed plates and be connected with preliminary cooling structure and secondary cooling structure, the left end and the intake pipe of preliminary cooling structure are linked together, and the left end and the outlet duct of secondary cooling structure are linked together, and the right-hand member of preliminary cooling structure and the right-hand member of secondary cooling structure are linked together with the waste gas cavity of keeping in respectively. The invention can realize the adjustment of the cooling efficiency by replacing the inner tube, the fins and the ventilation straight tube under the condition of not changing a mold for producing the cooler.)

1. Cooler of variable cooling efficiency, including casing (9), characterized by: a flange-shaped cover plate (6) is covered at the right end of the shell (9), and an air inlet pipe (12) and an air outlet pipe (13) which are not communicated with each other are arranged at the left end of the shell (9); two fixing plates (2) used for dividing the interior of the shell (9) into different spaces are vertically arranged on the inner wall of the shell (9) at intervals, a waste gas temporary storage cavity is formed between the fixing plate (2) on the right side and the flange-shaped cover plate (6), a cooling water cavity used for circulating cooling water is enclosed between the two fixing plates (2) and the inner wall of the shell (9), and a water outlet pipe (4) and a water inlet pipe (11) communicated with the cooling water cavity are respectively arranged at the upper end and the lower end of the shell (9); from down and can dismantle in proper order between two fixed plates (2) and be connected with respectively and transversely pass the preliminary cooling structure that the cooling water cavity was used for tentatively cooling waste gas and be used for carrying out the secondary cooling structure that reduces the temperature by a wide margin to waste gas, the left end and intake pipe (12) of preliminary cooling structure are linked together, the left end and outlet duct (13) of secondary cooling structure are linked together, the right-hand member of preliminary cooling structure and the right-hand member of secondary cooling structure are linked together with waste gas temporary storage cavity respectively.

2. The variable cooling efficiency chiller according to claim 1 wherein: preliminary cooling structure is used for finely tuning cooler efficiency and can increase the straight tube (8) of ventilating of cooler intensity including demountable installation between two fixed plates (2) through changing the diameter, and the left end and the intake pipe (12) of straight tube (8) of ventilating are linked together, and the right-hand member and the waste gas of straight tube (8) of ventilating keep in the cavity and are linked together.

3. The variable cooling efficiency chiller according to claim 1 wherein: the secondary cooling structure includes from the top down interval demountable installation in multiunit inner tube (15) between two fixed plates (2) and joins in marriage multiunit fin (7) of setting in inner tube (15) respectively in proper order, fin (7) and inner tube (15) cooperation form the seal chamber who is used for circulating waste gas, all form between the front and back outer wall of every group inner tube (15) and the front and back inner wall of casing (9) and be used for making the cooling water passageway that cooling water cavity internal cooling water passed through, the left end of inner tube (15) is linked together and the right-hand member and the waste gas of inner tube (15) are kept in the cavity and are linked together.

4. The variable cooling efficiency cooler according to claim 3, wherein: the section of the fin (7) is of a periodically-changing rectangular structure.

5. The variable cooling efficiency chiller according to claim 1 wherein: and a bracket (3) for mounting and positioning is fixedly arranged at the top end of the outer wall of the shell (9).

6. The variable cooling efficiency chiller according to claim 1 wherein: the end part of the air inlet pipe (12) is provided with an air inlet flange (14), and the end part of the air outlet pipe (13) is provided with an air outlet flange (1).

Technical Field

The invention relates to the technical field of an engine tail gas emission recirculation system.

Background

An EGR valve in an engine exhaust gas recirculation system (EGR system) is mainly used for adjusting and controlling the flow of recirculated exhaust gas, an electric EGR valve controls the opening size of an air inlet through an internal direct current motor so as to indirectly control the opening size of the EGR to adjust the flow of the exhaust gas, and the exhaust gas and fresh air are mixed according to a certain proportion and then return to a cylinder to enter the cylinderIs recirculated to reduce in-cylinder combustion temperature and rate of combustion to further reduce NO_XThe amount of discharge of (c). The EGR cooler is used for reducing the temperature of the air inlet of the engine, thereby reducing the combustion temperature and further reducing NO_XThe temperature of the EGR valve can be reduced, and the temperature-resistant grade of the EGR valve is met.

Before the matching arrangement, CAE simulation analysis is carried out by collecting some outlet air temperature, outlet air flow and the like of the engine and combining the parameters with the temperature expected to reach the cooling, however, data collected by domestic host plants are often inaccurate or incomplete, and CAE calculation has deviation, so that a matched cooler has many uncertain factors and the matching cooling efficiency is possibly higher or lower. When the cooling efficiency of the matched cooler is higher, the temperature of gas entering the EGR valve is lower, so that the EGR valve is easy to coke, and the service life of the EGR valve is shortened. When the cooling efficiency of the matched cooler is lower, the temperature of gas entering the EGR valve is higher, the emission influence is brought, or the EGR valve does not meet the use requirement of parts. The existing cooler cannot adjust the cooling efficiency, and when the required cooling efficiency is different, the whole cooler needs to be replaced, so that the waste of the cooler is caused.

In addition, the production cost of the mold is high when the cooler is manufactured. In the calibration process of the engine, the shape of the supercharger and the shape of the air inlet and outlet pipes are optimized, so that the cooler is usually changed into a plurality of types, the number of scrapped dies is large, and the development period of the cooler is usually long. When the cooling efficiency of the matched cooler is not suitable, the mold for producing the cooler is wasted, and the production cost is increased.

Disclosure of Invention

The invention provides a cooler with variable cooling efficiency, which aims to solve the problems that the existing cooler cannot adjust the cooling efficiency to cause the waste of the cooler and increase the production cost, so as to achieve the purpose of adjusting the cooling efficiency of the cooler, ensure that the required cooling efficiency is not required to be changed at the same time, reduce the waste of the cooler, reduce the waste of a production mold of the cooler and reduce the production cost.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows.

The cooler with variable cooling efficiency comprises a shell, wherein a flange-shaped cover plate is covered at the right end of the shell, and an air inlet pipe and an air outlet pipe which are not communicated with each other are arranged at the left end of the shell; two fixing plates for dividing the interior of the shell into different spaces are vertically arranged on the inner wall of the shell at intervals, a waste gas temporary storage cavity is formed between the fixing plate on the right side and the flange-shaped cover plate, a cooling water cavity for circulating cooling water is enclosed between the two fixing plates and the inner wall of the shell, and a water outlet pipe and a water inlet pipe which are communicated with the cooling water cavity are respectively arranged at the upper end and the lower end of the shell; can dismantle in proper order between two fixed plates from down and be connected with respectively the traversing cooling water cavity be used for carrying out preliminary cooling structure of tentatively cooling and be used for carrying out the secondary cooling structure that reduces the temperature by a wide margin to waste gas, the left end and the intake pipe of preliminary cooling structure are linked together, and the left end and the outlet duct of secondary cooling structure are linked together, and the right-hand member of preliminary cooling structure and the right-hand member of secondary cooling structure are linked together with waste gas temporary storage cavity respectively.

Further optimize technical scheme, preliminary cooling structure includes that demountable installation is used for finely tuning cooler efficiency and can increase the straight tube of ventilating of cooler intensity through changing the diameter between two fixed plates, and the left end and the intake pipe of the straight tube of ventilating are linked together, and the right-hand member and the waste gas of the straight tube of ventilating keep in the cavity and are linked together.

Further optimize technical scheme, the secondary cooling structure includes from the top down interval demountable installation in the multiunit inner tube between two fixed plates in proper order and joins in marriage the multiunit fin that sets up including the setting respectively, and the fin forms the seal chamber who is used for circulating waste gas with the inner tube cooperation, all forms between the front and back outer wall of every group inner tube and the front and back inner wall of casing to be used for making the cooling water passageway that cooling water passes through in the cooling water cavity, and the left end and the outlet duct of inner tube are linked together and the right-hand member of inner tube and waste gas keep in the cavity and.

Further optimizing the technical scheme, the section of the fin is of a periodically-changing rectangular structure.

Further optimize technical scheme, the outer wall top of casing is fixed and is provided with the support that is used for carrying out the installation location.

According to the technical scheme, the air inlet flange is arranged at the end part of the air inlet pipe, and the air outlet flange is arranged at the end part of the air outlet pipe.

Due to the adoption of the technical scheme, the technical progress of the invention is as follows.

According to the invention, the primary cooling structure and the secondary cooling structure which are detachably connected between the two fixing plates from bottom to top in sequence can realize primary cooling and large-amplitude cooling of waste gas, and the adjustment of cooling efficiency can be realized by controlling the internal structures of the primary cooling structure and the secondary cooling structure. According to the invention, under the condition of not changing a mold for producing the cooler, the adjustment of the cooling efficiency can be realized by replacing the inner tube, the fins and the ventilation straight tube, the replacement of parts is very convenient, and only the replacement is needed when the assembly is carried out, so that the whole cooler is not required to be replaced when the required cooling efficiency is different, the waste of the cooler is reduced, the waste of the mold for producing the cooler is reduced, and the production cost is reduced.

When the cooler is used, if the efficiency of the cooler is slightly higher, the ventilation straight pipe can be replaced by the ventilation straight pipe with smaller diameter so as to reduce the diameter of the ventilation straight pipe of the cooler. After the diameter of the ventilation straight pipe is reduced, when the waste gas passes through the ventilation straight pipe, the contact area between the surface area of the ventilation straight pipe and the cooling water in the cooling water cavity is reduced, and therefore the efficiency of the cooler is reduced. If the cooler efficiency is slightly lower, the diameter of the straight ventilation pipe is increased to improve the cooling efficiency.

When the exhaust gas passes through the fins, the contact area of the exhaust gas and cooling water is large, and the exhaust gas can be in full contact with the cooling water, so the cooling efficiency of the cooler mainly depends on the number of layers of the fins and the length of the fins. The more the number of layers of fins or the longer the length of the fins, the higher the cooling efficiency, the less the number of layers of fins or the shorter the length of the fins, the lower the cooling efficiency, and thus the cooler efficiency can be changed by reducing or increasing the number of layers of fins and inner tubes, which is desirable. If the efficiency of the cooler is seriously high, the number of layers of the fins and the inner tube needs to be reduced, so that the efficiency of the cooler is reduced. If the efficiency of the cooler is seriously low, the number of layers of the fins and the inner tube needs to be increased, so that the efficiency of the cooler is improved.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a left side view of the present invention;

FIG. 3 is a schematic view of the cooler cooling water and exhaust gas flow direction of the present invention, wherein the black area is the water zone and the hatched area is the gas zone;

FIG. 4 is a schematic view of the structure of the present invention for reducing the number of layers of fins;

FIG. 5 is a schematic view of the structure of the present invention for reducing the diameter of the straight ventilation pipe.

Wherein: 1. the air outlet device comprises an air outlet flange, 2, a fixing plate, 3, a support, 4, an air outlet pipe, 5, an air outlet pipe seat, 6, a flange-shaped cover plate, 7, fins, 8, a ventilation straight pipe, 9, a shell, 10, an air inlet pipe seat, 11, an air inlet pipe, 12, an air inlet pipe, 13, an air outlet pipe, 14, an air inlet flange, 15 and an inner pipe.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments.

A cooler with variable cooling efficiency is shown in a combined mode in figures 1 to 5 and comprises a shell 9, a flange-shaped cover plate 6, an air inlet pipe 12, an air outlet pipe 13, a fixing plate 2, a water inlet pipe 11, a water outlet pipe 4, a primary cooling structure and a secondary cooling structure.

A flange-shaped cover plate 6 is provided to cover the right end of the housing 9.

An air inlet pipe 12 and an air outlet pipe 13 are arranged at the left end of the shell 9 and are not communicated with each other, the air inlet pipe 12 is used for introducing waste gas to be cooled, and the air outlet pipe 13 is used for outputting the cooled waste gas. The provision of the inlet pipe 12 and the outlet pipe 13 ensures circulation of the exhaust gas.

The end of the inlet pipe 12 is provided with an inlet flange 14, and the end of the outlet pipe 13 is provided with an outlet flange 1. The arrangement of the air inlet flange 14 and the air outlet flange 1 is more convenient for the device to be connected with an engine and an electric EGR valve.

The two fixing plates 2 are vertically arranged on the inner wall of the shell 9 at intervals and used for dividing the interior of the shell 9 into different spaces, and the fixing plates 2 arranged in the invention can play a role in preventing waste gas and cooling water from being mixed. The fixing plate 2 of the present invention is press-formed. An exhaust gas temporary storage cavity is formed between the fixing plate 2 and the flange-shaped cover plate 6 on the right side. A cooling water cavity is enclosed between the two fixing plates 2 and the inner wall of the shell 9 and is used for circulating cooling water. An air inlet pipe 12 and an air outlet pipe 13 are respectively arranged on the left side of the left fixing plate, and the air outlet pipe 13 is arranged above the air inlet pipe 12.

The water outlet pipe 4 and the water inlet pipe 11 are respectively arranged at the upper end and the lower end of the shell 9, and the water outlet pipe 4 and the water inlet pipe 11 are respectively communicated with the cooling water cavity. Specifically, the water inlet pipe 11 is arranged on the left side of the lower end of the shell 9, and the water outlet pipe 4 is arranged on the right side of the upper end of the shell 9, so that the cooling water is retained in the cooling water cavity for a longer time. The arranged water outlet pipe 4 and the arranged water inlet pipe 11 can ensure the circulation of cooling water. The water outlet pipe 4 is arranged on the shell 9 through the water outlet pipe seat 5, and the water inlet pipe 11 is arranged on the shell 9 through the water inlet pipe seat 10.

Preliminary cooling structure and secondary cooling structure from down and can dismantle the connection in proper order between two fixed plates 2, and preliminary cooling structure and secondary cooling structure are the traversing cooling water cavity respectively. Preliminary cooling structure is used for carrying out preliminary cooling to waste gas. The secondary cooling structure is used for greatly cooling the waste gas. The left end and the intake pipe 12 of preliminary cooling structure are linked together, and the left end and the outlet duct 13 of secondary cooling structure are linked together, and the right-hand member of preliminary cooling structure and the right-hand member of secondary cooling structure are linked together with the waste gas cavity of keeping in respectively. From this one, the waste gas that gets into by intake pipe 12 at first can enter into preliminary cooling structure in, reentrant waste gas keeps in the cavity, then enters into the secondary cooling structure in, is exported by outlet duct 13 at last again.

Preliminary cooling structure is including ventilating straight tube 8, and the straight tube 8 demountable installation of ventilating is between two fixed plates 2, and ventilates straight tube 8 and transversely passes the cooling water cavity, consequently can guarantee to walk gas in the straight tube 8 of ventilating, walks water in the cooling water cavity. The fixed plate 2 is provided with a punching hole, and the ventilation straight pipe 8 is arranged in the punching hole and fixed with the fixed plate 2.

The cooler efficiency is fine-tuned by changing the diameter of the straight ventilation pipe 8, and the straight ventilation pipe 8 can increase the cooler strength. The left end of the ventilation straight pipe 8 is communicated with an air inlet pipe 12, and the right end of the ventilation straight pipe 8 is communicated with the waste gas temporary storage cavity.

Since the fixing plate 2 of the present invention is press-formed, when the diameter of the straight ventilation pipe 8 is changed, the inner diameter of the punched hole is reduced correspondingly when the fixing plate 2 is press-formed, so as to adapt to the diameter of the straight ventilation pipe 8. Under the condition of ensuring that the appearance of the fixing plate 2 is not changed, the design target is achieved by changing the stamping method of the fixing plate.

The secondary cooling structure comprises a plurality of groups of inner tubes 15 and a plurality of groups of fins 7 which are respectively assembled in the inner tubes 15.

The multiple groups and the inner pipe 15 are sequentially and detachably arranged between the two fixing plates 2 at intervals from top to bottom and are arranged in the shell 9.

The left end of the inner tube 15 is communicated with the air outlet tube 13 and the right end of the inner tube 15 is communicated with the waste gas temporary storage cavity.

The cross section of the fin 7 is a periodically varying rectangular structure. The fins 7 cooperate with the inner tube 15 to form a sealed chamber for the circulation of exhaust gases. The exhaust gas circulating in the inner pipe 15 does not mix with the cooling water in the cooling water chamber.

All form the cooling water passageway between the outer wall around every group inner tube 15 and the inner wall around casing 9, the cooling water passageway is used for making cooling water in the cooling water cavity to pass through, and then makes cooling water can follow outlet pipe 4 and discharge, realizes circulative cooling's purpose.

All offer the locating hole that is used for fixing a position inner tube 15 on every fixed plate 2, inner tube 15 passes the locating hole, through locating plate and set screw with inner tube 15 location to fixed plate 2 on, the locating plate is assembled with inner tube 15 interference, all offered the screw hole on the lateral wall of locating plate and fixed plate 2.

The top end of the outer wall of the shell 9 is fixedly provided with a support 3, the support 3 is provided with a mounting hole, and the support 3 is used for mounting and positioning the cooler.

When the invention is assembled, the fins 7 are firstly penetrated into the inner tubes 15, then according to the required cooling efficiency, a proper number of inner tubes with fins are selected, the inner tubes with fins are clamped between the two fixing plates 2 and are fixed by the positioning plates and the screws. The sealing plate is fixed to the position hole of the fixing plate 2 without the inner tube by screws for sealing, and the mixing of the exhaust gas and the cooling water is prevented.

Meanwhile, the ventilation straight pipe 8 is also positioned between the fixing plates, the support 3, the water outlet pipe seat 5, the water outlet pipe 4, the water inlet pipe seat 10 and the water inlet pipe 11 are welded on the shell 9 in a brazing mode, then the air outlet flange 1, the flange-shaped cover plate 6 and the fixing plate 2 provided with the inner pipe 15 and the ventilation straight pipe 8 are sequentially assembled, and finally the ventilation straight pipe 8 is fixed together in a welding mode.

The part playing a cooling role in the invention is divided into an upper part and a lower part which are respectively a primary cooling structure and a secondary cooling structure. The upper part is provided with a plurality of layers of fins 7 and a plurality of layers of inner pipes 15, so that the cooling effect is better, and the lower part is only provided with the ventilation straight pipe 8 for ventilation, and the cooling effect is poor relative to the upper part.

When the cooler is used, if the efficiency of the cooler is slightly higher, the straight ventilation pipe 8 can be replaced by a straight ventilation pipe with a smaller diameter so as to reduce the diameter of the straight ventilation pipe 8 of the cooler. Accordingly, the inner diameter of the punched hole is reduced when the fixing plate 2 is subjected to press forming. After the diameter of the straight ventilation pipe 8 is reduced, when the exhaust gas passes through the straight ventilation pipe 8, the contact area between the surface area of the straight ventilation pipe 8 and the cooling water in the cooling water cavity is reduced, thereby reducing the efficiency of the cooler. If the cooler efficiency is slightly low, the diameter of the straight ventilation pipe 8 is increased to improve the cooling efficiency.

When the exhaust gas passes through the fins 7, the contact area with the cooling water flow is large, and the exhaust gas can be in sufficient contact with the cooling water flow, so the cooling efficiency of the cooler mainly depends on the number of layers of the fins 7 and the length of the fins 7. The greater the number of layers of the fins 7 or the longer the length of the fins 7, the lower the number of layers of the fins 7 or the shorter the length of the fins 7, the lower the cooling efficiency, and thus the cooler efficiency can be changed by reducing or increasing the number of layers of the fins 7 and the inner tube 15. If the efficiency of the cooler is significantly higher, the number of layers of the fins 7 and the inner tube 15 needs to be reduced, thereby reducing the efficiency of the cooler. If the efficiency of the cooler is seriously low, the number of layers of the fins 7 and the inner tube 15 needs to be increased, so that the efficiency of the cooler is improved.

The purpose of reducing the efficiency of the cooler can be achieved by reducing the diameter of the ventilation straight pipe 8 and reducing the number of layers of the fins 7, but the effect of reducing the diameter of the ventilation straight pipe 8 is poorer than the effect of reducing the number of layers of the fins 7, so that when the cooling efficiency needs to be finely adjusted, the diameter of the ventilation straight pipe 8 can be reduced, and when the cooling efficiency is greatly adjusted, the number of layers of the fins 7 can be reduced.

According to the invention, under the condition of not changing a mold for producing the cooler, the cooling efficiency can be adjusted by replacing the inner tube, the fins and the ventilation straight tube, and the replacement of parts is very convenient and only needs to be carried out during assembly.