Cast aluminum thermostat shell for diesel engine

Abstract

The utility model discloses a cast aluminum thermostat shell for a diesel engine. The shell is formed by a cast aluminum material; a large circulation cavity, a small circulation cavity and a water inlet channel are arranged in the shell, the large circulation cavity is arranged above the small circulation cavity, the large circulation cavity is communicated with the small circulation cavity through a circulation switching port, and the large circulation cavity is communicated with the water inlet channel on the side; the shell is provided with a water inlet flange communicated with the water inlet channel, a large circulation water outlet used for installing a thermostat and communicated with the large circulation cavity, a water temperature sensor installation hole communicated with the large circulation cavity, a small circulation water return port communicated with the small circulation cavity and at least one machining hole communicated with the large circulation cavity. The thermostat shell has the advantages of high compatibility, small wall thickness, light weight, low manufacturing cost and the like.

Description

Technical Field

[0001] The utility model relates to a thermostat housing, in particular to a cast aluminum thermostat housing for a diesel engine. Background Art

[0002] The thermostat housing is used to install the thermostat, which controls the switching of the internal and external circulation of the engine cooling system, ensuring that after the engine is started at low temperature, the cooling system uses a small circulation to quickly increase the water temperature and reach the normal working temperature as soon as possible. After reaching the normal working temperature, the large circulation is opened in time to ensure that the engine temperature does not overheat.

[0003] With the upgrade of engine emission requirements and the development of technology, EGR systems are being installed in more and more engines. The EGR system requires cooling water circuits for cooling. According to the layout of engine accessories, the return water of the EGR circuit needs to be connected to the thermostat housing to connect to the circulation of the entire cooling system. The warm air inlet and return water of some models may also be connected to the thermostat. Whether or not the EGR system is equipped and the warm air system, two types of thermostat housings may be required, which increases the variety of parts and management costs. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a cast aluminum thermostat housing for a diesel engine, which has the advantages of high compatibility, thin wall thickness, light weight, low manufacturing cost, etc.

[0005] In order to achieve the above technical purpose, the technical scheme adopted is: a cast aluminum thermostat housing for a diesel engine, the housing is formed by cast aluminum material; a large circulation chamber, a small circulation chamber and a water inlet channel are arranged in the housing, the large circulation chamber is arranged above the small circulation chamber, the large circulation chamber is connected with the small circulation chamber through a circulation switching port, and the large circulation chamber is connected with the water inlet channel on the side; a water inlet flange connected with the water inlet channel, a large circulation outlet for installing a thermostat connected with the large circulation chamber, a water temperature sensor installation hole connected with the large circulation chamber, a small circulation return port connected with the small circulation chamber and at least one processing hole connected with the large circulation chamber are arranged on the housing, the processing hole is used as any one of the EGR system cooling water return port, the cab warm air return water port, the oil cooler return water port, and the air compressor return water interface, or a tee is installed on the processing hole to be used as any two of the EGR system cooling water return port, the cab warm air return water port, the oil cooler return water port, and the air compressor return water interface.

[0006] A boss extends from one side surface of the shell where the water inlet flange is located, and the plane where the top surface of the boss is located is coplanar with the plane where the top surface of the water inlet flange is located.

[0007] The large circulation cavity is also connected with a reserved boss for installing other sensors.

[0008] The reserved boss and the water temperature sensor mounting hole are arranged on the same plane.

[0009] The shell that encloses the large circulation chamber and the small circulation chamber is the right shell, and the shell that encloses the water inlet channel is the left shell. The right shell is located on the upper part of the left shell, so that a water pump installation space is formed between the bottom surface of the right shell and the right side surface of the left shell.

[0010] An O-ring sealing structure is provided on the surface of the water inlet flange.

[0011] The beneficial effects of the utility model are:

[0012] 1. The shell is made of cast aluminum material, which is lighter than the cast iron shell and has structural strength despite its thin wall thickness. The surface holes and shapes of the integrated molding are of better quality, which can meet the various access requirements of various systems. There is no need to add another thermostat shell, which has low production cost and better compatibility.

[0013] 2. Add a boss on the plane where the water inlet flange is located. When the water inlet flange is laid down on its side, the boss is coplanar with the water inlet flange, which plays a role in supporting and stabilizing processing and is also convenient for transportation.

[0014] 3. Because it is made of cast aluminum material, a reserved boss for installing other sensors can be reserved on the shell, which can be sealed when not in use.

[0015] 4. The reserved boss and the water temperature sensor installation hole are set on the same plane, that is, facing the inside of the engine. This setting is safer and can avoid damage during transportation and lifting after installation.

[0016] 5. Reasonably set the position between the large circulation chamber, the small circulation chamber and the water inlet channel so that the large circulation chamber and the small circulation chamber are located on the upper side as a whole, forming a water pump installation space, which has reasonably saved space.

[0017] 6. The water inlet is sealed with an O-ring to fix the vertical mounting surface, which can avoid problems such as misalignment of traditional gaskets and inadequate sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a three-dimensional structure of one side of the utility model;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the other side of the utility model;

[0020] Figure 3 For this utility model Figure 1 Right view of;

[0021] Figure 4 For this utility model Figure 3 AA section view;

[0022] Figure 5 This is a cross-sectional structural diagram of the thermostat installed in the utility model;

[0023] In the figure: 1. Water inlet flange, 2. Boss, 3. Large circulation water outlet, 4. Processing hole, 5. Water temperature sensor installation hole, 6. Reserved boss, 7. Small circulation return hole, 8. Water inlet channel, 9. Large circulation cavity, 10. Small circulation cavity, 11. Circulation switching port, 12. Right side outer shell, 13. Left side outer shell, 14. Thermostat, 15. Return port cover. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. In the description of the present invention, it should be noted that, unless otherwise specified, "multiple" means two or more; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inside", "outside", "front end", "rear end", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] like Figure 1 As shown, a cast aluminum thermostat housing for a diesel engine is formed of a cast aluminum material. Compared with cast iron materials, cast aluminum materials are smaller in size, lighter in weight, thinner in wall, and easier to form in diesel engine applications, making them easier to connect to various system pipes.

[0026] like Figure 4 , Figure 5 As shown, a large circulation chamber 9, a small circulation chamber 10 and a water inlet channel 8 are provided in the shell. The large circulation chamber 9 is arranged above the small circulation chamber 10. The large circulation chamber 9 is connected with the small circulation chamber 10 through a circulation switching port 11. A thermostat 14 is installed corresponding to the circulation switching port 11. The thermostat 14 is located above the circulation switching port 11. The circulation is switched by the thermostat 14, and the large circulation chamber 9 is connected with the water inlet channel 8 on the side.

[0027] like Figure 1 , Figure 2 As shown, a water inlet flange 1, a large circulation water outlet 3, a water temperature sensor installation hole 5, a small circulation water return port 7 and at least one processed hole 4 are provided on the shell.

[0028] like Figure 4 As shown, the vertically arranged water inlet flange 1 is connected to the water inlet channel 8. The water inlet flange 1 is arranged at the lowest end of the water inlet channel 8, and is used to connect the cover-less return water port and fix the thermostat housing. The highest end of the water inlet channel 8 is connected to the large circulation chamber 9.

[0029] like Figure 5As shown, the large circulation water outlet 3 is used to install the thermostat and is connected to the large circulation chamber 9. When a certain temperature is reached, the thermostat will open the large circulation water outlet 3. The large circulation water outlet 3 and the return water port cover 15 are fixed with a two-hole flange. The return water port cover 15 covers and fixes the thermostat 14. When the thermostat 14 is opened, the cooling water is led back to the radiator.

[0030] like Figure 2 As shown, the water temperature sensor mounting hole 5 is a threaded hole, which is connected to the large circulation chamber 9 and is used to measure the water temperature and control the working status of other engine systems according to the water temperature.

[0031] like Figure 2 As shown, the small circulation water return port 7 connected to the small circulation chamber 10 is used to directly return the water entering the small circulation chamber 10 to the water pump.

[0032] like Figure 1 As shown, at least one machining hole 4 is connected to the large circulation chamber 9. When there is only one machining hole 4, only one system needs to be connected. The machining hole 4 can be used alone as any one of the EGR system cooling water return port, the cab heater water return port, the oil cooler water return port, and the air compressor water return port. When there are two machining holes, they can be used alone as any two of the four ports. Alternatively, a tee is installed on the machining hole 4 to be used as any two of the EGR system cooling water return port, the cab heater water return port, the oil cooler water return port, and the air compressor water return port. When there is one machining hole 4, one machining hole 4 is connected to a tee, which can be used as two interfaces. When there are two machining holes 4, the first machining hole is connected to a tee, which can be connected to four interfaces. Alternatively, the first machining hole is connected to a tee, and the other machining hole is directly connected, which can be used as three interfaces at the same time. This structure can connect multiple systems at the same time, and can also be blocked when not in use, thereby improving the compatibility of the shell.

[0033] like Figure 3 As shown, the water temperature sensor installation plane is staggered in the same plane as the processing hole and the reserved boss to avoid interference between the throat clamp of the connected hose and the temperature sensor after the processing hole is installed.

[0034] The specific process of the large circulation is as follows: the water pump presses the cooling water into the engine, and the water after cooling the engine enters from the water inlet channel 8. When the water temperature reaches 76°C, the thermostat 14 opens, and most of the water enters the large circulation chamber 9 and flows out from the large circulation outlet 3 to the radiator tank for cooling, and then returns to the water pump. A small part enters the small circulation chamber 10 and returns to the water pump from the small circulation return port 7. When the water temperature rises again to 82°C, the thermostat 14 is fully opened, blocking the circulation switching port 11, the small circulation chamber is closed, and water only flows out from the large circulation outlet 3.

[0035] The specific process of the small circulation is as follows: the thermostat 14 closes the large circulation outlet 3, the water pump presses the cooling water into the engine body water jacket and the engine cylinder head water jacket, and enters the thermostat housing from the cylinder head water return port to the water inlet flange. The water temperature does not reach the opening temperature of the thermostat 14. After passing through the water inlet channel 8, the large circulation chamber 9, and the small circulation chamber 10, the cooling water flows back to the water pump from the small circulation water return port 7.

[0036] like Figure 1 As shown, a boss 2 extends from the surface of one side of the shell where the water inlet flange 1 is located, and the plane where the top surface of the boss 2 is located is coplanar with the plane where the top surface of the water inlet flange 1 is located. The boss 2 is used to play a supporting role during processing and fixing. Because of the coplanar state, the boss 2 and the water inlet flange 1 can be placed flat on a flat table to prevent one end of the shell from being unstable and inconvenient for fixing and processing.

[0037] like Figure 2 As shown, the large circulation chamber 9 is also connected with a reserved boss 6 for installing other sensors. The reserved boss 6 can be used as a spare installation hole. It is blocked when not needed. When needed, it can be opened to install other types of sensors, such as mechanical temperature sensors.

[0038] like Figure 2 , Figure 3 As shown, the reserved boss 6 and the water temperature sensor mounting hole 5 are arranged on the same plane, and both face the inside of the engine at the same time, which is safer and avoids damage during transportation and lifting.

[0039] like Figure 1 , Figure 2 , Figure 4 As shown, the shell that encloses the large circulation chamber 9 and the small circulation chamber 10 is the right shell 12, and the shell that encloses the water inlet channel 8 is the left shell 13. The right shell 12 is located on the upper part of the left shell 13, so that a water pump installation space is formed between the bottom surface of the right shell 12 and the right side surface of the left shell 13. This structure lifts the large circulation chamber and the small circulation chamber upward to avoid the water pump below, which is convenient for the installation of the water pump, and also convenient for the small circulation return port 7 to be directly connected to the water pump nearby, saving space and facilitating connection.

[0040] like Figure 1 As shown, an O-ring sealing structure is provided on the surface of the water inlet flange 1, and the O-ring sealing structure is adopted to ensure the strength and sealing of the connection structure.

[0041] It should be noted that the parts not described in detail in this article are prior art, and the above embodiments are only used to illustrate the present utility model, but the present utility model is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model fall within the protection scope of the present utility model.

Claims

1. A cast aluminum thermostat housing for a diesel engine, characterized in that: The shell is made of cast aluminum material; A large circulation chamber (9), a small circulation chamber (10) and a water inlet channel (8) are provided in the shell, the large circulation chamber (9) is arranged above the small circulation chamber (10), the large circulation chamber (9) is communicated with the small circulation chamber (10) through a circulation switching port (11), and the large circulation chamber (9) is communicated with the water inlet channel (8) on the side; The shell is provided with a water inlet flange (1) connected to the water inlet channel (8), a large circulation water outlet (3) for installing a thermostat and connected to the large circulation chamber (9), a water temperature sensor installation hole (5) connected to the large circulation chamber (9), a small circulation water return port (7) connected to the small circulation chamber (10), and at least one processing hole (4) connected to the large circulation chamber (9); the processing hole (4) is used as any one of an EGR system cooling water return port, a cab warm air return port, an oil cooler return port, and an air compressor return port; or a tee is installed on the processing hole (4) and used as any two of the EGR system cooling water return port, the cab warm air return port, the oil cooler return port, and the air compressor return port.

2. A cast aluminum thermostat housing for a diesel engine as claimed in claim 1, characterized in that: A boss (2) extends from a surface of one side of the shell body where the water inlet flange (1) is located, and a plane where a top surface of the boss (2) is located is coplanar with a plane where a top surface of the water inlet flange (1) is located.

3. A cast aluminum thermostat housing for a diesel engine as claimed in claim 1, characterized in that: The large circulation cavity (9) is also connected to a reserved boss (6) for mounting other sensors.

4. A cast aluminum thermostat housing for a diesel engine as claimed in claim 3, characterized in that: The reserved boss (6) and the water temperature sensor mounting hole (5) are arranged coplanarly.

5. A cast aluminum thermostat housing for a diesel engine as claimed in claim 1, characterized in that: The shell that encloses the large circulation chamber (9) and the small circulation chamber (10) is the right shell (12), and the shell that encloses the water inlet channel (8) is the left shell (13). The right shell (12) is located on the upper part of the left shell (13), so that a water pump installation space is formed between the bottom surface of the right shell (12) and the right side surface of the left shell (13).

6. A cast aluminum thermostat housing for a diesel engine as claimed in claim 1, characterized in that: An O-ring sealing structure is provided on the surface of the water inlet flange (1).

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