High-pressure fuel oil and lubricating oil heat exchanger

Abstract

The utility model relates to the technical field of heat exchange, in particular to a high-pressure fuel and lubricating oil heat exchanger which comprises an outer barrel and an inner barrel fixedly arranged in the outer barrel, and an area between the outer barrel and the inner barrel is a working area. A spiral layering partition plate is arranged in the working area, the layering partition plate is spirally wound on the inner barrel, one side of the layering partition plate is fixedly connected with the outer circumferential surface of the inner barrel, and the other side of the layering partition plate is fixedly connected with the inner circumferential surface of the outer barrel; the working area is divided into a spiral flow guide heat exchange area by the layering partition plate, and a plurality of baffling devices are uniformly distributed in the flow guide heat exchange area; the heat exchanger is simple in overall structure, high in heat exchange performance, simple in production process, high in welding quality and high in product reliability. The connecting mode of the collecting pipes and the inlet and outlet connectors is adopted, the pressure bearing capacity of equipment can be effectively improved, and the weight reduction effect of the equipment is obvious.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchange technical field, concretely relates to a high pressure fuel oil heat exchanger. BACKGROUND

[0002] High pressure fuel oil heat exchanger is widely used in aviation, ship, locomotive and many other industries, is used for heat exchange of fuel oil and oil, carries out cooling to oil, carries out heating to fuel oil, is matched with fuel oil system, mainly utilizes oil to preheat fuel oil into the combustion chamber, reduces energy consumption, improves fuel combustion efficiency. SUMMARY

[0003] In order to solve above-mentioned problem, the utility model provides a kind of high pressure fuel oil heat exchanger, which solves the technical problems of low fuel oil heat exchange efficiency, heavy weight, low reliability and easy to block.

[0004] The utility model discloses a high pressure fuel oil heat exchanger, including outer cylinder body and fixedly arranged in the inner cylinder body of outer cylinder body, the area between outer cylinder body and inner cylinder body is working area;

[0005] Spiral stratified baffle is arranged in the working area, the stratified baffle is spirally wound on the inner cylinder body, and one side of the stratified baffle is fixedly connected with the outer circumferential surface of the inner cylinder body, and the other side of the stratified baffle is fixedly connected with the inner circumferential surface of the outer cylinder body;

[0006] The stratified baffle divides the working area into spiral flow guide heat exchange area, and a plurality of flow baffling devices are uniformly distributed in the flow guide heat exchange area;

[0007] High pressure fuel inlet joint is arranged on one end of the outer cylinder body, and high pressure fuel outlet joint is arranged on the other end of the outer cylinder body;The high pressure fuel inlet joint is connected with a plurality of spiral heat exchange pipes through fuel inlet manifold located between the outer cylinder body and the inner cylinder body, the spiral heat exchange pipe is wound on the inner cylinder body along the flow guide heat exchange area, and the other end is connected with fuel outlet manifold located between the inner cylinder body and the outer cylinder body, and the fuel outlet manifold is connected with high pressure fuel outlet joint;

[0008] Low pressure oil inlet joint is arranged on the circumferential surface of the outer cylinder body close to high pressure fuel outlet end, and low pressure oil outlet joint is arranged on the circumferential surface of the other end of the outer cylinder body, and the low pressure oil inlet joint and the low pressure oil outlet joint are connected with both ends of the flow guide heat exchange area respectively.

[0009] Preferably, the baffle device comprises first baffles and second baffles, which are arranged alternately in the flow guide heat exchange region, one end of the first baffles is fixedly connected to the outer peripheral surface of the inner cylinder, the other end of the first baffles extends towards the inner wall of the outer cylinder, and a first passing region for the low-pressure lubricating oil to flow through is arranged between the first baffles and the inner wall of the outer cylinder.

[0010] One end of the second baffles is fixedly connected to the inner wall of the outer cylinder, the other end of the second baffles extends towards the inner barrel, and a second passing region for the low-pressure lubricating oil to flow through is arranged between the second baffles and the inner cylinder.

[0011] The spiral heat exchange pipes partially pass through the first baffles and the second baffles.

[0012] Preferably, the first baffles and the second baffles are both provided with through holes, and the through holes on the first baffles or the second baffles are divided into pipe passing holes for the spiral heat exchange pipes to pass through and oil passing holes for the low-pressure lubricating oil to flow through.

[0013] Preferably, the number of the pipe passing holes on the same baffle is less than the number of the spiral heat exchange pipes.

[0014] Preferably, the outer cylinder comprises a cylindrical outer cylinder body and end covers arranged on both ends of the outer cylinder body, and the low-pressure lubricating oil inlet joint, the low-pressure lubricating oil outlet joint, the high-pressure fuel oil inlet joint and the high-pressure fuel oil outlet joint are arranged on the two end covers, respectively.

[0015] The utility model discloses a whole structure simple, heat exchange performance height, production process simple, welding quality height, product reliability height.

[0016] The utility model discloses the connection mode of collecting pipe and import and export joint can effectively improve the pressure-bearing capacity of equipment, and the weight reduction effect of equipment is obvious.

[0017] The utility model discloses a plurality of spiral heat exchange pipes can realize equipment pressure-bearing capacity is excellent, and effectively avoid the defect that microchannel heat exchanger is easy to block.

[0018] The design of the spiral heat exchange pipe can realize the heat exchange capacity caused by the secondary reflux of the pipe side of the heat exchanger, and the design of the layered partition plate and the baffle can effectively improve the flow distance and the heat exchange capacity between the pipes.

[0019] The utility model discloses a whole structure simple, heat exchange performance height, production process simple, welding quality height, product reliability height. ACCURACY

[0020] Figure 1 It is the structure schematic drawing of the utility model.

[0021] Figure 2 It is the schematic diagram of the spiral heat exchange pipe.

[0022] Figure 3 Figure 1 is a schematic view of the connection between the inner cylinder and the layered partition plate.

[0023] Reference signs: 1. high-pressure fuel inlet joint, 2. low-pressure lubricating oil inlet joint, 3. high-pressure fuel outlet joint, 4. head, 5. mounting bracket, 6. outer cylinder, 7. low-pressure lubricating oil outlet joint, 8. fuel inlet manifold, 9. fuel outlet manifold, 10. spiral heat exchange pipe, 11. layered partition plate, 12. first baffle, 13. second baffle, 14. inner cylinder. DETAILED DESCRIPTION

[0024] The utility model discloses a high-pressure fuel lubricating oil heat exchanger, including the outer cylinder 6 and the inner cylinder 14 of fixed setting in the outer cylinder 6, the area between the outer cylinder 6 and the inner cylinder 14 is the working area;

[0025] Spiral layered partition plate 11 is arranged in the working area, the layered partition plate 11 spirally winds on the inner cylinder 14, and one side of the layered partition plate 11 is fixedly connected with the outer circumferential surface of the inner cylinder 14, and the other side of the layered partition plate 11 is fixedly connected with the inner circumferential surface of the outer cylinder 6;

[0026] The layered partition plate 11 divides the working area into spiral flow guide heat exchange regions, and a plurality of flow guide devices are uniformly distributed in the flow guide heat exchange regions.

[0027] One end of the outer cylinder 6 is provided with a high-pressure fuel inlet joint 1, and the other end of the outer cylinder 6 is provided with a high-pressure fuel outlet joint 3; the high-pressure fuel inlet joint 1 is connected with a plurality of spiral heat exchange pipes 10 through a fuel inlet manifold 8 located between the outer cylinder 6 and the inner cylinder 14, the spiral heat exchange pipes 10 are wound on the inner cylinder 14 along the flow guide heat exchange regions, and the other ends are connected with a fuel outlet manifold 9 located between the inner cylinder 14 and the outer cylinder 6, and the fuel outlet manifold 9 is connected with the high-pressure fuel outlet joint 3.

[0028] The circumferential surface of the outer cylinder 6 near the high-pressure fuel outlet end is provided with a low-pressure lubricating oil inlet joint 2, and the circumferential surface of the other end of the outer cylinder 6 is provided with a low-pressure lubricating oil outlet joint 7, and the low-pressure lubricating oil inlet joint 2 and the low-pressure lubricating oil outlet joint 7 are connected with the two ends of the flow guide heat exchange region respectively.

[0029] The flow guide device comprises a first baffle 12 and a second baffle 13, the first baffle 12 and the second baffle 13 are alternately arranged in the flow guide heat exchange region, one end of the first baffle 12 is fixedly connected with the outer circumferential surface of the inner cylinder 14, the other end of the first baffle 12 extends towards the inner wall of the outer cylinder 6, and a first passing area for the low-pressure lubricating oil to flow through is arranged between the first baffle 12 and the inner wall of the outer cylinder 6.

[0030] One end of the second baffle 13 is fixedly connected with the inner wall of the outer cylinder 6, the other end extends towards the inner barrel, and a second passing area for low-pressure lubricating oil to flow through is arranged between the second baffle 13 and the inner cylinder 14.

[0031] The spiral heat exchange pipe 10 partially penetrates the first baffle 12 and the second baffle 13.

[0032] The first baffle 12 and the second baffle 13 are both provided with through holes, and the through holes on the first baffle 12 or the second baffle 13 are divided into pipe passing holes for the spiral heat exchange pipe 10 to pass through and oil passing holes for low-pressure lubricating oil to flow through.

[0033] The number of pipe passing holes on the same baffle is less than the number of spiral heat exchange pipes 10.

[0034] The outer cylinder 6 includes a cylindrical outer cylinder body and a sealing head 4 sealingly arranged on both ends of the outer cylinder body, and the low-pressure lubricating oil inlet joint 2, the low-pressure lubricating oil outlet joint 7, the high-pressure fuel inlet joint 1 and the high-pressure fuel outlet joint 3 are arranged on the two sealing heads 4 respectively. The mounting bracket 5 is used for the installation of the utility model.

[0035] The novel high-pressure fuel lubricating oil heat exchanger is a tube-shell spiral pipe type heat exchanger. High-pressure and low-temperature fuel oil flows in the spiral heat exchange pipe 10, and low-pressure and high-temperature lubricating oil flows between the spiral heat exchange pipes 10. The high-temperature lubricating oil in the spiral heat exchange pipe 10 transfers heat to the low-temperature fuel oil. The fuel oil flows through the fuel inlet joint, the fuel inlet header 8, the spiral heat exchange pipe 10, the fuel outlet header 9 and the fuel outlet joint in sequence. The lubricating oil first flows into the lubricating oil inlet joint and then flows into the flow guide heat exchange area, and finally flows out from the lubricating oil outlet joint. The design of the spiral heat exchange pipe 10 can effectively increase the flow distance, and the fuel oil can effectively break the thermal boundary layer under the action of centrifugal force, thereby improving the heat transfer performance on the fuel oil side. The design of the first baffle 12 and the second baffle 13 can effectively improve the heat transfer performance on the lubricating oil side.

[0036] The novel application deletes the design of the conventional tube-shell heat exchanger tube plate and the sealing head 4, and adopts the design form of the header, so that the weight of the heat exchanger can be effectively reduced.

[0037] The spiral heat exchange pipe 10 and the header are vacuum brazed by stainless steel, so that the welding strength is high, and the reliability of the heat exchanger is stable.

[0038] In the production process, first, the first baffle 12, the second baffle 13, the inner cylinder 14, the outer cylinder 6, the layered partition plate 11, the spiral heat exchange pipe 10, the inlet manifold, the outlet manifold are assembled integrally, and after assembly is completed, the work fixture is fixed, and then placed in a stainless steel vacuum brazing furnace for brazing. After welding, solid solution treatment is carried out to improve the strength of stainless steel. Finally, the fuel inlet joint, the fuel outlet joint, the head 4, the lubricating oil inlet joint and the lubricating oil outlet joint are welded by argon arc welding.

[0039] Through the design of the high-pressure fuel oil heat exchanger, the spiral heat exchange pipe 10 and the manifold are brazed in a vacuum, which avoids the poor quality and high difficulty of manual welding in the case of a large number of spiral heat exchange pipes 10.

[0040] In addition, the design of the spiral heat exchange pipe 10 effectively solves the design form of the multi-flow baffle, and can well realize the arrangement of the inter-tube baffle and realize efficient heat exchange.

[0041] In addition, the design of the layered partition plate 11 can improve the flow time of the fluid in the heat exchanger and improve the heat exchange capacity.

[0042] The utility model discloses a whole structure simple, heat exchange performance height, production process simple, welding quality height, product reliability height.

[0043] The utility model discloses the connection type of manifold and inlet and outlet joint can effectively improve the pressure-bearing capacity of equipment, and the weight reduction effect of equipment is obvious.

[0044] The utility model discloses a plurality of spiral heat exchange pipes 10 can realize the pressure-bearing capacity of equipment is excellent, and effectively avoid the defect that microchannel heat exchanger is easy to block.

[0045] The design of the spiral heat exchange pipe 10 can realize the heat exchange capacity of the heat exchanger pipe side secondary reflux, and the design of the layered partition plate 11 and the baffle can effectively improve the flow distance and heat exchange capacity between the pipes.

[0046] The utility model discloses a whole structure simple, heat exchange performance height, production process simple, welding quality height, product reliability height.

Claims

1. A high pressure fuel oil heat exchanger comprising an outer cylinder and an inner cylinder fixedly arranged within the outer cylinder, characterized in that, The area between the outer cylinder and the inner cylinder is a working area; The working area is provided with a spiral layered baffle, which is spirally wound on the inner cylinder, and one side of the layered baffle is fixedly connected with the outer peripheral surface of the inner cylinder, and the other side of the layered baffle is fixedly connected with the inner peripheral surface of the outer cylinder; The layered baffle divides the working area into a spiral flow guide heat exchange area, and a plurality of baffle devices are uniformly distributed in the flow guide heat exchange area; One end of the outer cylinder is provided with a high-pressure fuel inlet joint, and the other end of the outer cylinder is provided with a high-pressure fuel outlet joint; the high-pressure fuel inlet joint is connected with a plurality of spiral heat exchange pipes through a fuel inlet manifold located between the outer cylinder and the inner cylinder, the spiral heat exchange pipes are wound on the inner cylinder along the flow guide heat exchange area, and the other end is connected with a fuel outlet manifold located between the inner cylinder and the outer cylinder, and the fuel outlet manifold is connected with the high-pressure fuel outlet joint; The peripheral surface of the outer cylinder near the high-pressure fuel outlet end is provided with a low-pressure lubricating oil inlet joint, and the peripheral surface of the other end of the outer cylinder is provided with a low-pressure lubricating oil outlet joint, and the low-pressure lubricating oil inlet joint and the low-pressure lubricating oil outlet joint are respectively connected with both ends of the flow guide heat exchange area.

2. A high pressure fuel oil heat exchanger as claimed in claim 1, characterized in that The baffle device comprises a first baffle plate and a second baffle plate, the first baffle plate and the second baffle plate are alternately arranged in the flow guide heat exchange area, one end of the first baffle plate is fixedly connected with the outer peripheral surface of the inner cylinder, the other end of the first baffle plate extends towards the inner wall of the outer cylinder, and a first passing area for low-pressure lubricating oil to flow through is arranged between the first baffle plate and the inner wall of the outer cylinder; One end of the second baffle plate is fixedly connected with the inner wall of the outer cylinder, the other end of the second baffle plate extends towards the inner cylinder, and a second passing area for low-pressure lubricating oil to flow through is arranged between the second baffle plate and the inner cylinder; The spiral heat exchange pipes partially pass through the first baffle plate and the second baffle plate.

3. A high pressure fuel oil heat exchanger as claimed in claim 2, characterized in that The first baffle plate and the second baffle plate are both provided with through holes, and the through holes on the first baffle plate or the second baffle plate are divided into pipe passing holes for the spiral heat exchange pipes to pass through and oil passing holes for low-pressure lubricating oil to flow through.

4. A high pressure fuel oil heat exchanger as claimed in claim 3, characterized in that The number of pipe passing holes on the same baffle plate is less than the number of spiral heat exchange pipes.

5. The high pressure fuel oil heat exchanger of claim 1 wherein, The outer cylinder comprises a cylindrical outer cylinder body and a head sealingly arranged on both ends of the outer cylinder body, and the low-pressure lubricating oil inlet joint, the low-pressure lubricating oil outlet joint, the high-pressure fuel inlet joint and the high-pressure fuel outlet joint are arranged on the two heads respectively.

Images