Heat exchange device for hydraulic machine

Abstract

The present invention relates to a heat exchange device for a hydraulic machine, the heat exchange device being used as a device for cooling hydraulic oil for operating the hydraulic machine. An inlet chamber (11) and an outlet chamber (12) are formed in parallel inside a body (10) having a uniform cross-section, multiple heat medium transfer tubes (20) are embedded in the inlet chamber (11) and the outlet chamber (12), partition walls (40) are installed at both ends of each of the inlet chamber (11) and the outlet chamber (12), and both ends of the body (10) are sealed by bonnets (30). Therefore, heat exchange is performed between a thermal fluid passing through the inside of the body (10) and a heat medium transferred through the tubes (20).

Description

Heat exchanger for hydraulic machinery

[0001] The present invention relates to a heat exchange device utilized as a cooling device for hydraulic oil for operating a hydraulic machine, wherein an inlet chamber and an outlet chamber are formed in parallel inside a main body having a constant cross-section, and a plurality of heat medium transport tubes are built into the inlet chamber and the outlet chamber, and a partition wall is installed at both ends of the inlet chamber and the outlet chamber, and both ends of the main body are sealed with a bonnet, so that heat exchange occurs between a heat fluid passing through the inside of the main body and a heat medium transported along the tubes.

[0002] A heat exchanger for hydraulic machinery is a device that cools high-temperature hydraulic oil by heat exchange between the hydraulic oil, which is a thermal fluid, and the cooling water, which is a heat medium, by having a number of cooling water pipes built into the heat exchanger body through which the hydraulic oil recovered from the hydraulic machine passes. The cooled hydraulic oil is resupplied to the hydraulic machine, and the hydraulic oil heated during the process of being used in the hydraulic machine is fed back into the heat exchanger, forming a circulation structure.

[0003] A heat exchanger for a general hydraulic machine is composed of a main body having an inlet and an outlet through which hydraulic fluid, which is a thermal fluid, enters and exits, and through which the thermal fluid flows inside, and a number of tubes built into the main body through which a thermal medium, such as cooling water, is continuously circulated or transported.

[0004] These heat exchange devices can be configured in various ways depending on the structure of the main body, the installation method of the tubes, and the flow path shape of the thermal fluid within the main body. As a related prior art, Korean Patent No. 353320 can be cited.

[0005] A heat exchanger for hydraulic machinery is a device for cooling hydraulic oil used in hydraulic machinery. Rather than being used independently, it is installed as a component of the hydraulic machinery. Therefore, when considering the installation environment and operability, it can achieve great advantages in miniaturization.

[0006] Conventional heat exchange devices, including Korean Patent No. 353320, have a structure in which a plurality of partition walls are formed inside so that the thermal fluid moves along a zigzag path inside the main body, and a plurality of pipe connection means for the inlet and outlet of the thermal medium are welded to both ends of the cylindrical container, and a plurality of side protrusions for connecting the pipes for the inlet and outlet of the thermal fluid are welded to the outer surface of the container, thereby having a complex main body structure.

[0007] The complex structure of the body of such conventional heat exchange devices not only complicates the manufacturing process and increases manufacturing costs, but also requires the formation of numerous welds to interconnect each component, which is disadvantageous in securing pressure resistance.

[0008] The present invention has been designed to minimize the size of a heat exchange device by ensuring maximum contact between the thermal fluid and the heat medium within the heat exchange device even in a narrow space in consideration of the aforementioned problems, while also ensuring pressure resistance and reducing manufacturing costs by extremely simplifying the structure and manufacturing process of the main body (10).

[0009] A heat exchange device for a hydraulic machine according to the present invention is a heat exchange device for a hydraulic machine, in which a main body (10) having a plurality of tubes (20) through which a heat medium moves is sealed at both ends with a bonnet (30), and heat exchange is performed by contact between the heat fluid and the tubes (20) as the heat fluid moves inside the main body (10), wherein an inlet chamber (11) and an outlet chamber (12) through which the heat fluid moves are formed longitudinally in the main body (10) having a constant cross-section, and an inlet hole (17) connected to the inlet chamber (11) and an outlet hole (18) connected to the outlet chamber (12) are formed on the upper surface of the main body (10), and both ends of the inlet chamber (11) and the outlet chamber (12) are closed with a partition wall (40), and a tube (20) through which a heat medium moves is installed longitudinally between the partition walls (40), and a bonnet (30) installed at one end of the main body (10) is provided with an inlet hole (31) connected to the tube (20) in the inlet chamber (11), and It is configured by forming an outlet (32) connected to a tube (20) in the outlet room (12).

[0010] According to the present invention, a sealed hole (15) sealed with a plug (16) may be formed on the rear side of the main body (10), and a turning hole (14) may be formed on the separating wall (13) between the inlet chamber (11) and the outlet chamber (12) to turn the thermal fluid from the inlet chamber (11) to the outlet chamber (12).

[0011] According to the present invention, a bonnet (30) installed at the other end of the main body (10) may be formed with a circulating path (34) that circulates the heat medium discharged from the tube (20) in the inlet chamber (11) and supplies it to the tube (20) in the outlet chamber (12).

[0012] According to the present invention, a joining plate (50) having an inlet (51) connected to an inlet hole (17) and an outlet (52) connected to an outlet hole (18) may be attached to the upper surface of the front end of the main body (10).

[0013] According to the present invention, a rotating plate (41) having a semicircular shape, which is a plate body coupled to a tube (20), can be installed between the partition plates (40) on both sides of the inlet chamber (11) and the outlet chamber (12) so that the thermal fluid can flow in a rotating manner.

[0014] Through the present invention, despite the narrow internal space due to the longitudinal extension reduction of the heat exchange device, the heat exchange efficiency can be maintained or improved by ensuring maximum contact between the thermal fluid and the heat medium within the heat exchange device, and by forming the cross-section of the main body (10) to be constant, the structure and manufacturing process of the main body (10) can be extremely simplified, thereby securing pressure resistance and reducing the manufacturing cost at the same time.

[0015] In particular, miniaturization of the heat exchange device is possible through extension and reduction of the main body (10), and despite the simple structure of the main body (10), the external pipe joints, etc. can be formed with only minimal processing such as simple perforation, so that not only is high-level quality control related to pressure resistance and airtightness possible, but productivity can also be maximized.

[0016] Figure 1 is a perspective view of the present invention.

[0017] Figure 2 is a partially cut perspective view of the present invention.

[0018] Figure 3 is an exploded perspective view of the present invention.

[0019] Figure 4 is an example of a thermal fluid path of the present invention.

[0020] Figure 5 is an example of a heat medium flow path of the present invention.

[0021] Figure 6 is a diagram explaining the manufacturing method of the main body of the present invention.

[0022] The detailed configuration and operating principle of the present invention are described below with reference to the attached drawings.

[0023] First, FIG. 1 and FIG. 2 illustrate the exterior and interior structure of the present invention, respectively. As illustrated in these drawings, the present invention comprises a main body (10) having a rectangular shape in appearance, a pair of bonnets (30) joined to both ends of the main body (10) to seal the main body (10), and an inlet (51) and an outlet (52) attached to the upper surface of the main body (10) to which a thermal fluid pipe is connected.

[0024] That is, the present invention is a heat exchange device for a hydraulic machine, in which a main body (10) having a plurality of tubes (20) through which a heat medium is transported is sealed at both ends with a bonnet (30) and heat exchange is performed by contact between the heat fluid and the tubes (20) as the heat fluid moves inside the main body (10). As shown in FIGS. 1 to 3, an inlet chamber (11) and an outlet chamber (12) through which the heat fluid passes are formed longitudinally in the main body (10) having a constant cross-section, and an inlet hole (17) connected to the inlet chamber (11) and an outlet hole (18) connected to the outlet chamber (12) are cut and formed on the upper surface of the main body (10).

[0025] The inlet chamber (11) and outlet chamber (12) formed in the main body (10) are circular cavities formed in the longitudinal direction of the main body (10), and these inlet chambers (11) and outlet chambers (12) are parallel to each other.

[0026] In addition, a sealing hole (15) sealed with a stopper (16) is formed on the rear side of the main body (10), and a turning hole (14) is formed on the separating wall (13) between the inlet chamber (11) and the outlet chamber (12) to turn the thermal fluid from the inlet chamber (11) to the outlet chamber (12). Here, the sealing hole (15) and the turning hole (14) are formed to be concentric on the side of the main body (10), which is because a drilling tool that enters from the outside of the main body (10) through the side of the main body (10) during the manufacturing process of the present invention drills the sealing hole (15) and the turning hole (14) at the same time.

[0027] In addition, as shown in FIGS. 2 and 3, a partition wall (40) is installed at both ends of the inlet chamber (11) and the outlet chamber (12), a tube (20) through which a heat medium moves is installed longitudinally between the partition walls (40), an inlet hole (31) connected to the inlet chamber (11) and an outlet hole (32) connected to the outlet chamber (12) are formed in a bonnet (30) installed at one end of the main body (10), and a circulating path (34) is formed in the bonnet (30) installed at the other end of the main body (10) to circulate the heat medium discharged from the tube (20) in the inlet chamber (11) and supply it to the tube (20) in the outlet chamber (12).

[0028] The main body (10) has a structure having a constant cross-section throughout the entire longitudinal section as shown in FIGS. 1 to 3, and the cross-section of the main body (10) has a rectangular outer surface and two circular cavities are formed parallel to each other inside.

[0029] In addition, as shown in FIGS. 2 and 3, both ends of the inlet chamber (11) and the outlet chamber (12) are closed with a partition wall (40), and a tube (20) through which a heat medium moves is installed longitudinally between the partition walls (40), and an inlet hole (31) connected to the tube (20) in the inlet chamber (11) and an outlet hole (32) connected to the tube (20) in the outlet chamber (12) are formed in a bonnet (30) installed at one end of the main body (10), and a circulation path (34) is formed in the bonnet (30) installed at the other end of the main body (10) to rotate the heat medium discharged from the tube (20) in the inlet chamber (11) and supply it to the tube (20) in the outlet chamber (12).

[0030] A plurality of tubes (20) having both ends fitted into a bulkhead (40) that seals both ends of the inlet chamber (11) and the outlet chamber (12) are pipes through which cooling water, which is a heat medium, is transported, and a plurality of heat dissipation fins (21) are formed on the outer surface of these tubes (20) to maximize contact with the heat fluid.

[0031] As shown in FIGS. 3 and 4, a semicircular swirl plate (41) is coupled between the baffles (40) fitted at each end of the tube (20) so that the thermal fluid can swirl in a zigzag pattern in the inlet chamber (11) and outlet chamber (12) while being coupled to the tube (20).

[0032] In addition, a joint plate (50) is attached to the upper surface of the front end of the main body (10), in which an inlet (51) connected to the inlet (17) and an outlet (52) connected to the outlet (18) are formed. A pipe (not shown) through which high-temperature hydraulic oil recovered from a hydraulic machine is transported is connected to the inlet (51) of the joint plate (50), and a pipe (not shown) for supplying cooled hydraulic oil to the hydraulic machine is connected to the outlet (52).

[0033] As shown in FIGS. 1 to 3, a bonnet (30) that seals both ends of the main body (10) is connected to each end of the main body (10). An inlet hole (31) connected to an inlet chamber (11) built-in tube (20) and an outlet hole (32) connected to an outlet chamber (12) built-in tube (20) are formed in the bonnet (30) connected to one end of the main body (10), and a blocking wall (33) that separates the inlet hole (31) and the outlet hole (32) is formed between the inlet hole (31) and the outlet hole (32).

[0034] A heat medium pipe (not shown) for supplying coolant is connected to the inlet hole (31) of the bonnet (30) connected to one end of the main body (10), and a heat medium pipe (not shown) for recovering used coolant is connected to the outlet hole (32). In the bonnet (30) connected to the other end of the main body (10), a circulating path (34) is formed to guide the heat medium discharged from the tube (20) in the inlet chamber (11) to circulate and enter the tube (20) in the outlet chamber (12).

[0035] In the present invention having the structure described above, the high-temperature thermal fluid is cooled by contacting the low-temperature thermal medium. As shown in FIG. 4, the high-temperature thermal fluid is injected into the inlet chamber (11) through the inlet hole (17) at the front of the main body (10), and while moving rearward in the inlet chamber (11), it is moved by a rotational movement by the rotation plate (41) of the inlet chamber (11), and then enters the rear of the outlet chamber (12) through the rotation hole (14), and then moves forward past the rotation plate (41) of the outlet chamber (12), and is discharged through the outlet hole (18), and is cooled by contacting the tube (20) through which the thermal medium moves.

[0036] In addition, the low-temperature pre-use heat medium is injected into the inlet chamber (11) built-in tube (20) through the inlet hole (31) of the front bonnet (30) as shown in Fig. 5, moves to the rear bonnet (30), is rotated by the rotation path (34) of the rear bonnet (30), and is then injected into the outlet chamber (12) built-in tube (20), is moved to the front bonnet (30), and is then discharged through the outlet hole (32).

[0037] In this way, in the present invention, even though the internal space of the main body (10) is relatively narrow compared to the prior art, an excellent heat exchange effect can be obtained by optimizing the flow path of the thermal fluid and maximizing the contact efficiency with the heat medium.

[0038] In particular, by extremely simplifying the structure of the main body (10), it is possible to ensure convenience and productivity in manufacturing, as well as to provide the main body (10) with a high degree of confidentiality and pressure resistance. The manufacturing method of the main body (10) of the present invention is exemplified in Fig. 6.

[0039] As can be confirmed through Fig. 6, the main body (10) of the present invention has a structure in which the cross-section is set to be the same throughout the entire longitudinal section, and thus, a basic structure of the main body (10) with a dense and uniform structure can be manufactured extremely easily through extrusion processing.

[0040] That is, the cross-section of the main body (10) in which the inlet chamber (11) and the outlet chamber (12) are formed symmetrically in a rectangular cross-section, and a dividing wall (13) is formed between the inlet chamber (11) and the outlet chamber (12) is formed uniformly over the entire section from the front end to the rear end of the main body (10), so that the basic structure of the main body (10) as shown in the upper part of Fig. 6 can be completed simply by cutting the main body (10) continuously formed through extrusion processing into a certain standard.

[0041] In addition, the inlet hole (17) and outlet hole (18) penetrating the upper surface of the main body (10) can be formed by simple vertical drilling, and the screw hole for attaching the bonnet (30) to both ends of the main body (10) or attaching the joining plate (50) to the upper surface of the main body (10) can also be formed by simple drilling and tapping.

[0042] However, as shown in the lower part of Fig. 6, when machining a pivot hole (14) penetrating a partition wall (13) that divides an inlet chamber (11) and an outlet chamber (12), it is difficult for a drilling tool to enter the inside of the inlet chamber (11) and the outlet chamber (12), so as described above, the work is performed in such a way that a drilling tool that enters from the outside of the main body (10) through the side of the main body (10) simultaneously drills the sealing hole (15) and the pivot hole (14), and a separately manufactured plug (16) is combined with the sealing hole (15) to close the sealing hole (15), thereby maintaining the airtightness of the inside of the main body (10).

[0043] In addition, the sealing hole (15) illustrated in the attached drawing is formed on the side of the inlet chamber (11) of the main body (10), but since the turning hole (14) can also be perforated on the side of the outlet chamber (12), the installation positions of the sealing hole (15) and the plug (16) can be changed.

[0044] [Explanation of symbols]

[0045] 10: Body

[0046] 11: Inflow room

[0047] 12: Leakage room

[0048] 13: Separation wall

[0049] 14: Swivel

[0050] 15: Sealed space

[0051] 16: Stopper

[0052] 17: Inlet hole

[0053] 18: Outlet

[0054] 20: Tube

[0055] 21: Radiator fin

[0056] 30: Bonnet

[0057] 31: Intake

[0058] 32: Water outlet

[0059] 33: Barrier

[0060] 34: Turning

[0061] 40: Bulkhead

[0062] 41: Swivel plate

[0063] 50: Joint plate

[0064] 51: Inlet

[0065] 52: Outlet

Claims

1. The main body (10) having a plurality of tubes (20) through which a heat medium moves is sealed at both ends with a bonnet (30), and as the heat fluid moves inside the main body (10), heat exchange occurs through contact between the heat fluid and the tubes (20). In the main body (10) having a constant cross-section, an inlet chamber (11) and an outlet chamber (12) through which the heat fluid moves are formed longitudinally, and an inlet hole (17) connected to the inlet chamber (11) and an outlet hole (18) connected to the outlet chamber (12) are formed on the upper surface of the main body (10), and both ends of the inlet chamber (11) and the outlet chamber (12) are closed with a partition wall (40), and a tube (20) through which the heat medium moves is installed longitudinally between the partition walls (40), and a bonnet (30) installed at one end of the main body (10) is provided with an inlet hole (31) connected to the tube (20) in the inlet chamber (11) and an outlet hole (18) connected to the outlet chamber (12). In a heat exchange device for a hydraulic machine, an outlet hole (32) connected to a tube (20) is formed, and a bonnet (30) installed at the other end of the main body (10) has a circulation path (34) formed to rotate the heat medium discharged from the tube (20) in the inlet chamber (11) and supply it to the tube (20) in the outlet chamber (12). A heat exchange device for a hydraulic machine, characterized in that a joining plate (50) is attached to the upper surface of the front end of the main body (10), in which an inlet (51) connected to an inlet (17) and an outlet (52) connected to an outlet (18) are formed.

2. In claim 1, A heat exchange device for a hydraulic machine, characterized in that a sealed hole (15) sealed with a plug (16) is formed on the rear side of the main body (10), and a turning hole (14) is formed on the separating wall (13) between the inlet chamber (11) and the outlet chamber (12) to turn the thermal fluid from the inlet chamber (11) to the outlet chamber (12).

3. In claim 1, A heat exchange device for a hydraulic machine, characterized in that a rotating plate (41) having a semicircular shape is installed between the partition plates (40) on both sides of the inlet chamber (11) and the outlet chamber (12) so that the thermal fluid flows in a rotating manner as a plate body coupled to the tube (20).

Images