EA015160B1 - Thermostat body - Google Patents

Abstract

The invention relates to transport engineering, in particular to design of housing parts for thermostats of liquid cooling system of internal combustion engines (ICE). A thermostat body comprises two covers 1,2 connected therebetween and formed by cylindrical surfaces 3,4. The first cover 1 has a flange 5 for connection with a flange (not shown) of a collector of the ICE water cooling system and also has a branch pipe 6 for communication with an expansion tank (not shown). The second cover 2 has a branch pipe 7 for communication with a radiator (not shown). The first cover 1 flange 5 is arranged at an acute angle to its cylindrical surface 3 smoothly transforming into the first cover 1 branch pipe 6 via a conical surface 8. Wherein the second cover 2 is also formed by a spherical surface 9 smoothly transforming into the second cover 2 branch pipe 7 via its cylindrical surface 4. The invention has embodiments with the following features: A polymer material can be used for covers. Two short through holes 10 and two long through holes 11 are made in the first cover 1 flange 5 arranged in bosses 12 of the cylindrical surfaces 12. Four short through holes 10 are made in the first cover 1 flange 5 with slots for insert nuts. Both covers 1,2 have docking flanges forming arch-like end surfaces which, when covers 1,2 not tied contact by two short parts, and when tied by means of two bolt connections 17 – are in full touch. For that purpose the cover material is selected having elastic-deformable properties. Both covers can be screwed together or bayonet joined. Such covers can be locked either by comb-shaped gearing or by a pin or a finger. A bracket can be made on the side surface of the second cover 2 with a recess for entering a locking element through one of four short holes 10 of the first cover 1 flange 5.

Description

The invention relates to a transport mechanical engineering and relates to the construction of body parts for thermostats of a liquid cooling system of internal combustion engines (ICE).

Known thermostat housing [1], containing a base with a pipe for communication with an expansion tank and a cover with a pipe for communication with a radiator. The base and cover have internal cavities into which the thermocouple is inserted. The cover through the gasket is applied to the housing, which through another gasket is installed on the flange of the manifold of the internal combustion engine water cooling system.

The whole set is pulled together with the help of elements 9 of the threaded connection.

The disadvantage of the analogue [1] is the inconvenience of mounting and dismounting the thermostat housing on the internal combustion engine, since the thermostat housing is not a single assembly unit.

The thermostat housing [2] is more convenient to install, disassemble, and is closest in essence to a utility model, containing two covers bonded to each other by means of a bolt, having cylindrical surfaces. One of the covers is equipped with a flange for connecting to the flange of the manifold of the internal combustion engine water cooling system, as well as a pipe for communication with the expansion tank. Another cover is equipped with a pipe for communication with the radiator. At the same time, these pipes are perpendicular to the central hole of the flange of the lid for connection with the flange of the manifold of the engine water cooling system.

The disadvantage of the prototype is that such a direct perpendicular arrangement of the nozzles of the thermostat housing covers contributes to increased hydraulic resistance of the passage of coolant, which reduces the accuracy of the thermostat.

The objective of the invention is to reduce the hydraulic resistance of the thermostat housing.

The problem is solved in that the thermostat housing containing two covers bonded to each other and formed by cylindrical surfaces, the first of which is equipped with a flange for connecting to the flange of the collector of the water cooling system of the internal combustion engine, as well as a pipe for communication with the expansion tank, and the second cover is provided pipe for communication with a radiator, has distinctive features: the first flange of the first cover is located at an acute angle to its cylindrical surface, smooth transition box through a conical surface into the pipe of the first cover, while the second cover is also formed by a spherical surface that smoothly passes through its cylindrical surface into the pipe of the second cover.

The location of the aforementioned flange of the first cover at an acute angle to its cylindrical surface, and not perpendicularly, as in the prototype [2], is aimed at reducing hydraulic losses of the thermostat housing in the area of its communication with the ICE cooling jacket.

A smooth transition of the cylindrical surface through the conical surface into the pipe of the first cover is designed to reduce hydraulic losses of the thermostat housing in the area of its communication with the expansion tank.

The formation of the second cover, in addition to the cylindrical surface, is also directed by a spherical surface to reduce the hydraulic losses of the thermostat housing in the zone of connection of both covers before changing the direction of flow of the coolant.

A smooth transition of a spherical surface through its cylindrical surface into the nozzle of the second cover is designed to reduce hydraulic losses of the thermostat housing in the area of its communication with the radiator. Options for a utility model are as follows:

as the material of the caps used polymer;

two short through holes and two long through holes, which are located in the bosses of the cylindrical surface, are made in the flange of the first cover;

four short through holes are made in the flange of the first cover with slots for the nuts;

both covers are provided with docking flanges, with the formation of arched end surfaces, which in the non-bonded state of the caps are in contact with two short sections, and in the fastened state by means of two bolted joints they are fully contacted;

for this, the material of the covers is selected with elastically deformable properties;

for example, it may be a shape memory polymer;

both covers can be fastened together using a threaded or bayonet connection;

locking of such covers can be carried out either by comb engagement, or by means of a stud or pin;

on the side surface of the second cover can be made bracket with a recess for the entry of the locking element through one of the four short holes of the flange of the first cover.

The invention is illustrated by illustrations.

In FIG. 1 shows the thermostat housing, in which the covers are interconnected by bolts and which have elongated bosses of the first cover for fastening to the ICE flange, in FIG. 2 - the thermostat housing, in which the covers are interconnected by means of bolts and the first cover of which has recesses for nuts that are used to secure the housing

- 1 015160 thermostat to the internal combustion engine flange, in FIG. 3 - a variant of the thermostat housing, in which the covers are fastened to each other by means of a threaded or bayonet connection and which have elongated bosses of the first cover for fastening to the ICE flange, in FIG. 4 - a variant of the thermostat housing, in which the covers are fastened to each other by means of a threaded or bayonet connection, and the first cover of which has recesses for nuts that are used to secure the thermostat housing to the ICE flange, in FIG. 5 is a variant of the thermostat housing of FIG. 2 at the initial moment before tightening the bolt connection.

The thermostat housing contains two bonded caps 1, 2, which can be molded from a polymeric material to form cylindrical surfaces 3, 4. The first cap 1 is provided with a flange 5 for connecting to the flange (not shown) of the collector of the water cooling system of the internal combustion engine, and also a pipe 6 for communication with an expansion tank (not shown). The second cover 2 is equipped with a pipe 7 for communication with a radiator (not shown). The flange 5 of the first cover 1 is located at an acute angle to its cylindrical surface 3, smoothly passing through the conical surface 8 into the pipe 6 of the first cover 1. In this case, the second cover 2 is also formed by a spherical surface 9, smoothly passing through its cylindrical surface 4 into the pipe 7 of the second covers 2.

Embodiments of the invention are as follows.

In the flange 5 of the first cover 1 (Fig. 1, 3) there are two short through holes 10 and two long through holes 11, which are located in the bosses 12 of the cylindrical surface 3.

In the flange 5 of the first cover 1 (Fig. 2, 4, 5) there are four short through holes 10 with grooves 13 for the nuts.

Both covers 1, 2 are equipped with docking flanges, respectively, 14 and 15 (Fig. 1-5) with the formation of arched end surfaces, which in the unfastened state of the caps 1, 2 are in contact with two short sections 16 (Fig. 5), and in the fastened state through two bolted connections 17 (Fig. 1, 2) are fully contacted. For this, the material of the caps 1, 2 is selected with elastically deformable properties. For example, it may be a shape memory polymer.

Both covers 1, 2 (Fig. 3, 4) can be screwed together using a thread (not shown) or fastened using an internal bayonet connection (not shown).

The locking of such covers 1, 2 can be accomplished either by internal comb engagement (not shown) or by means of a pin or stud (not shown).

On the second cover 2 (Fig. 3), a bracket 18 with a recess 19 can be made for the locking element (not shown) to enter through one of the four short holes 10 of the flange 5 of the first cover 1. The thermostat housing is used as follows. A thermocouple (not shown) is placed inside the cylindrical surface 3 of the first cover 1, with emphasis on the seat of its docking flange 14. Then connect the first and second roofs 1, 2 with the connecting flanges 14, 15 and fasten them, either by tightening the bolt connection 17 (Fig. 1, 2, 5), or (Fig. 3, 4) by screwing (not shown) the covers 1 , 2 relative to each other until they stop, or pressing their flanges 14, 15 against each other using a bayonet coupling (not shown).

In this case, the fixation of the screwed and fastened bayonet-type covers 1, 2 can occur by any of the options described above.

In the embodiment of the caps 1, 2 made of a polymer with elastically deformable properties, first, when they are joined by the flanges 14, 15 along two short lines 16, a gap is formed (Fig. 5), which is eliminated after tightening the bolted joint 17, forming a tight fit of the caps 1, 2 to each other to a friend. This is done in order to ensure a reliable tight connection of covers 1, 2 along the entire diameter of their flanges 14, 15 during operation.

Then, the flange 5 of the first cover 1 assembled the thermostat housing is attached to the flange (not shown) of the collector of the water cooling system of the internal combustion engine and tighten this connection, for example with bolts. In the embodiment of FIG. 3, one of these bolts (not shown) can enter to lock the second cover 2 into the recess 19 of its bracket 18.

After that, pipes 6 and 7 are connected using hoses (not shown), respectively, to the expansion tank and to the radiator of the cooling system of the internal combustion engine.

Due to such a mutual arrangement of the lids 1, 2, the presence of spherical and conical shapes in them, which smoothly pass to cylindrical shapes, the hydraulic losses of the thermostat housing when the coolant passes through it will be significantly reduced. This, ultimately, will positively affect the accuracy and quality of the cooling system.

Information sources.

1. The catalog of parts for YaMZ engines. - Yaroslavl, YaMZ - 2001, p. 100.

2. Patent KI 2202046, IPC B01R 7/16, claimed. 2002.03.19, publ. 2003.04.10 (prototype).

Claims (12)

CLAIM 1. Thermostat housing containing two lids bonded to each other and formed by cylindrical surfaces, the first of which is fitted with a flange for connection to the flange of the collector of the water-cooling system of the internal combustion engine, as well as a branch pipe for communication with the expansion tank, and the second lid is provided with a connection pipe for a radiator, characterized in that said flange of the first cover is located at an acute angle to its cylindrical surface, which smoothly passes through the conical surface into the nozzle the first cover, while the second cover is also formed by a spherical surface, smoothly passing through its cylindrical surface into the nozzle of the second cover. 2. Thermostat housing according to claim 1, characterized in that a polymer is used as the material of the covers. 3. Thermostat housing according to claim 1, characterized in that in the flange of the first cover there are two short through holes and two long through holes, which are located in the bosses of the cylindrical surface. 4. Thermostat housing according to claim 1, characterized in that four short through-holes are made in the flange of the first cover with grooves for the fixed nuts. 5. Thermostat housing according to claim 3, characterized in that both covers are provided with connecting flanges with the formation of arcuate end surfaces that are in an unconnected condition of the covers are in contact with two short sections, and in an affixed state by means of two bolted connections, are fully contiguous. 6. Thermostat housing according to claim 5, characterized in that the material of the covers is selected with resiliently deformable properties. 7. Thermostat housing according to claim 6, characterized in that a shape memory polymer is used as the material of the covers. 8. Thermostat housing according to claim 1, characterized in that both covers are screwed together. 9. Thermostat housing according to claim 1, characterized in that both covers are fastened together with each other by means of a bayonet connection. 10. Thermostat housing according to claim 8 or 9, characterized in that the locking of the covers is carried out with the help of comb hooking. 11. The thermostat housing of claim 8 or 9, characterized in that the locking of the covers is carried out with the help of a stud or pin. 12. Thermostat housing of claim 8 or 9, characterized in that the second lid has a bracket with a recess for entering the locking element through one of the four short holes of the flange of the first lid.