JPS6117217Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is an improvement of a cooling system for an internal combustion engine, and in particular, an engine cooling water cooler of the type in which a thermostat for controlling the temperature of circulating cooling water is attached to the outlet part is fixed to the engine body. This relates to a cooler mount.

Conventionally, in an internal combustion engine such as a marine diesel engine, there is a cooling system that uses seawater to secondarily cool fresh water cooling water that circulates within the engine and cools high-temperature parts such as a cylinder jacket and cylinder head.
A so-called fresh water cooler is attached, but this type of fresh water cooler is usually fixed to the engine main body via a mounting base, and the outlet part is connected to the main flow path that passes through the fresh water cooler and the fresh water. A thermos that automatically controls the temperature of the cooling water to a predetermined temperature by increasing/decreasing the flow rate ratio of fresh water cooling water flowing through both sides of the bypass flow path provided to bypass the cooler according to changes in the temperature of the cooling water. A cooling water pump is connected in front of the thermostat to supply fresh cooling water cooled in the fresh water cooler to each part of the engine.

However, the thermostat case that houses the conventional thermostat and the cooling water pump body are each formed separately, and when attaching them to a fresh water cooler, first attach the fresh water cooler to the engine using a mounting base. The thermostat case and cooling water pump were installed near the fresh water cooler, and a series of cooling systems were constructed by connecting them with a connecting pipe. If the case and pump body are formed separately and assembled, the number of parts such as the thermostat case, pump body, or connecting pipe increases, making the structure complex and requiring disassembly and assembly during maintenance and inspection. Not only is it complicated, but
There was also the problem that the manufacturing cost of the engine was high.

Therefore, each component of these cooling systems is integrated,
In order to make the device more compact and simple,
A mounting base for installing a fresh water cooler on an engine, a cooling water pump, and a thermostat case are integrally formed, and the thermostat can be easily attached and detached from the thermostat case part.
Although some proposals have been made, if the cooling water pump is integrated with the mounting base, it can be mounted on the top of the mounting base if the cooling water pump needs to be removed for repair or maintenance. After removing the fresh water cooler, the mounting base and thermostat case must be removed together, making the work extremely complicated and requiring a great deal of time and effort for repair. The problem has been that the waterproof performance of the product has deteriorated, causing water leakage.

The present invention focused on the problems inherent in the conventional fresh water cooler mounting structure and the mounting structure of cooling systems such as thermostats and cooling water pumps, and was devised to solve these problems. A fresh water cooler mounting base that is detachably installed and a thermostat case that has a removably built-in inner case housing a thermostat are integrally connected, and the fresh water cooler is attached to the thermostat case. In addition to providing an opening on the fresh water outlet side that opens in a direction parallel to the cooling water pump mounting seat formed on the stand,
A cooling water pump is removably installed in the fresh water cooler so that the back surface is in contact with the cooling water pump mounting surface and the suction port is watertightly fitted into the fresh water outlet side opening of the thermostat case. The structure is characterized by a

Hereinafter, the specific content of the present invention will be explained with reference to the embodiments shown in the accompanying drawings 1 to 3.
Figure 1 shows a case where a fresh water cooler is installed in a marine internal combustion engine using the cooler mounting base according to the present invention, and in the figure, 1 is a tank that stores fresh water cooling water that circulates through the jacket in the engine. A shell tube type fresh water cooler consisting of a number of cooling tubes through which seawater pumped up by a seawater pump (not shown) built into the tank is circulated,
At the bottom of the fresh water cooler 1, a fresh water outlet 2 of a fresh water flow path formed in the cooler 1, that is, a main flow path A, is opened, and at a position near the fresh water outlet 2, the fresh water outlet 2 is opened. A communication port 3 of a bypass flow path B formed by a bypass pipe branched from a pipe that introduces fresh water into the cooler 1 is open.

On the other hand, in the figure, reference numeral 4 denotes a fresh water cooler mounting base which constitutes the main part of the present invention, and the mounting base 4 is attached to one end, that is, the right end in the figure, as shown in FIGS. 2 and 3. It has a thermostat case 4a that houses a thermostat, which will be described later, and a cooling water pump mounting seat surface 4b that is continuous with the thermostat case 4a.
and a cooler support portion 4c formed at the end of the back surface portion 4b are integrally connected.
Mounting bolt holes 5 are vertically bored in the thermostat case 4a and the cooler support part 4c for fixing the bottom of the fresh water cooler 1 to the mounting base 7 with bolts or the like, respectively. A set bolt mounting hole 6 for fixing the mounting base 4 to a cylinder block or the like is bored in the thermostat case 4a and the cooling water pump mounting seat surface 4b.

The thermostat case 4a of the cooler mounting base 4 has the fresh water cooler 1 explained in FIG. 1 on its upper surface.
It has through holes 7 and 8 corresponding to the fresh water outlet 2 and the communication port 3 on the lower surface, respectively, and a thermos is provided in the axial direction of the fresh water outlet side opening 4d into which the inlet 9a of the cooling water pump 9 fits during assembly. It has an inner case storage chamber 4e into which an inner case 12 containing the tattoo 10 can be fitted.

The inner case 12 usually has a cylindrical shape with a bottom, and its outer circumferential surface is watertightly fitted with the inner surface of the inner case storage chamber 4e of the thermostat case 4a by means of a D ring 13. has a built-in thermostat 11, and is attached to the thermostat case 4a by screwing a mounting flange 12a provided at the bottom to the open end of the thermostat case 4a on the inner case storage chamber 4e side with bolts 14. It is assembled integrally. The cylindrical portion of the inner case 12 has the through hole 7 of the thermostat case 4a,
In addition to the main passage hole 12b and bypass passage hole 12c corresponding to No.
The thermostat seal ring 15 is interposed between the thermostat seal ring 15 and the inner case 11 so as to partition the main flow path and the bypass flow path B in a watertight manner. Accordingly, it is movable in the left and right directions in FIG.

On the other hand, as the cooling water pump 9, a centrifugal pump having an impeller inside a spiral casing is usually used, and its outwardly extending suction port 9a connects to the fresh water outlet side opening 4 of the thermostat case 4a.
d and fitted around the outer periphery of the suction port 9a.
The cooling water pump 9 is watertightly connected to the thermostat case 4a by the ring 10, and the discharge port 9b of the cooling water pump 9 is a fresh water flow port formed in the cooling water pump mounting seat surface 4b of the cooler mounting base 4. 16, and communicates with the jacket on the cylinder block side.

In the figure, 17 is a drive wheel that applies rotational force to the rotary blades of the cooling water pump 9 via a V-belt 18, 19 is a bonnet attached to the cylinder head 20 at the rear of the fresh water cooler 1, and 21 is a fresh water cooler. Figure 1 shows a well-known presser-type radiator cap mounted on top of a radiator cap.

In addition, in the above explanation, the case where a thermostat and a cooling water pump are attached in connection with a fresh water cooler used in a marine internal combustion engine has been described, but the cooler mounting base of the present invention is not limited to this, and can be used for other purposes. It can be applied to various similar coolers in internal combustion engines.

The fresh water cooler mounting base of the present invention has the configuration as described above, and is used by installing the fresh water cooler on the top of the engine, as shown in Figure 1, and installing the cooling water pump and thermostat. If it is necessary to replace the thermostat seal ring 15 wrapped around the thermostat 11 or the thermostat valve 11a, first remove the mounting bolts 14 that fasten the inner case 12, and then remove the inner case 12 from the thermostat. The thermostat 11 can be taken out together with the inner case 12 by simply removing it from the case 4a, and the thermostat 11, thermostat seal ring 15, etc. can be replaced, and the thermostat mechanism can be repaired and maintained quickly and easily.

Next, if it becomes necessary to remove only the cooling water pump 9, remove the bolts 22 that fasten the cooling water pump 9 to the cooling water pump mounting surface 4b of the mounting base 4, and By simply pulling out the mouth 9a from the fresh water outlet opening 4d of the thermostat case 4a, the thermostat can be easily removed from the mounting base 4 and internal repairs can be carried out.

Furthermore, only the fresh water cooler 1 can be mounted on the cooler mounting base 4.
To remove it from the mount, simply remove the bolts 23 that fasten the cooler 1 and the thermostat case 4a and the bolts 24 that fasten the cooler 1 and the cooler support part 4c of the mounting base 4. , the fresh water cooler 1 can be easily removed from the top of the engine.

Note that the temperature of fresh water cooling water is set to thermostat 11.
When the valve opening temperature is lower than the preset valve opening temperature, the valve 11a of the thermostat 11 is located at the solid line position in FIG.
When the cooling water temperature rises and reaches the valve opening temperature, valve 1
1a slides to the right in FIG. 1, and both the main flow path A and the bypass flow path B are opened at a ratio corresponding to the cooling water temperature, and the water temperature further rises, increasing the lift amount of the valve 11a. When the engine moves to the position shown by the broken line in Fig. 1, the bypass passage B is completely blocked, and the cooling water circulates between the engine and the main passage A of the fresh water cooler 1, and the cooling water reaches the required level. Maintaining the proper temperature is similar to that of internal combustion engines with conventional thermostatic mechanisms.

As described above, the fresh water cooler mounting base of the present invention is integrally equipped with a thermostat case that has a removably built-in inner case housing a thermostat, and the cooling water pump is attached to the thermostat case. Since it is removably equipped so that it is watertightly connected to the fresh water outlet side opening, when replacing consumable parts such as the thermostat or thermostat seal ring, the thermostat case and fresh water cooler can be replaced separately as in the conventional case. The thermostat can be easily separated by simply removing the inner case without having to separate and remove it. Also, when removing the cooling water pump, it is possible to connect the fresh water cooler, mounting base, and thermostat case. It is now possible to remove each component of the cooling system individually without having to release it, making it easy to remove and replace each component individually, and the space required for maintenance and repair is limited to the base necessary for maintaining each component. This makes it possible to carry out maintenance work easily even in a narrow engine room with limited installation space, such as in a marine diesel engine.

Furthermore, since the cooler mounting base of the present invention is integrally equipped with thermostat mounting members such as the thermostat case, the mounting base and thermostat mechanism can be made more compact, and the number of parts can be reduced by simplifying the configuration. It also has the practical effect of reducing manufacturing costs.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing the configuration of each part when a fresh water cooler is installed in a marine internal combustion engine using the fresh water cooler mount of the present invention, Figure 2 is a front view showing the configuration of the mount of the present invention, and Figure 3 The figure is a plan view of the mount. 1... Fresh water cooler, 4... Cooler mounting stand, 4a
... Thermostat case, 4b ... Cooling water pump mounting seat, 4d ... Fresh water outlet side opening, 9 ... Cooling water pump, 9a ... Intake port, 11 ... Thermostat, 12 ... Inner case.

Claims (1)

[Scope of utility model registration request] A fresh water cooler mounting base for removably installing the fresh water cooler on the engine body and a thermostat case that has a removably built-in inner case housing a thermostat are integrally connected, and the thermostat is The case is provided with a fresh water outlet side opening that opens in a direction parallel to the cooling water pump mounting seat formed on the fresh water cooler mounting base, and the cooling water pump is connected to the fresh water cooler mounting base, and the back surface is connected to the cooling water pump. A fresh water cooler mounting base, which is in contact with a mounting seat surface and is detachably equipped so that the inlet port is fitted in a watertight manner to the fresh water outlet side opening of the thermostat case.