RU18556U1 - THERMOSTAT - Google Patents

Abstract

on the utility model Thermostat

Authors: Kostina N.N., Tolochko EA,

Afanasyev S.P., Gavrilina V.A.

Kostikova V.I., Matyukhina A.I.

The poleanaya model relates to instrumentation for measuring and regulating the temperature of a continuous medium, and specifically, to thermostats of an automobile engine cooling system.

The goal is to reduce unwanted leakage by eliminating the misalignment of the contact surfaces of the main kshapan and the saddle during operation of the thermostat.

The end of the stem of the thermal power sensor has a spherical surface, which constantly abuts against the end flat or in the end surface of the adjusting screw, smoldering the possibility of axial movement along the thread in the thermostat cover.

Peffipat

Description

 the model relates to devices of intent and temperature control of a moving liquid medium, and specifically to thermostats of an automobile engine cooling system.

Thermostats are known (Automobile VAZ - 2108, authors Vershigora V.A., Ignatov A.P. et al., Moscow, DOSAAF, 1986, p. 62, Fig. 31; Automobiles Moskvich AZZH - 2141, - 21412, authors Tapinsky V.N., Mitrofanov V.A. et al., Moscow, Patriot 1990), consisting of a body and cover, rolled together with the saddle of the main valve, as well as pipes for entering the cooled fluid from the radiator, bypassing the engine fluid into the thermostat , coolant and expansion drum.

The main valve is pressed into the glass of the thermo-force sensor (for the VAZ-2108 car), in which the rubber insert is rolled. In the rubber insert there is a polished steel piston (rod) fixed rigidly with its threaded part (located at the end of the rod) in the holder. Between the walls of the glass walls and the rubber insert there is a heat-sensitive solid filler (thermal wax). The main valve is spring-loaded against the seat. On the main valve, two struts are secured, on which a bypass valve, spring-loaded, is installed.

The thermostat, depending on the temperature of the coolant, automatically turns on or off the radiator of the cooling system, passing fluid through the radiator or bypassing it. Increased demands are made on leaks through the main and overflow valves. Leakage is strictly regulated. The less leakage, the more optimal the engine operating mode, the faster the engine warms up in

20 () 01Ю111

F 01 P 7/16

THERMOSTAT

the beginning of its work and faster ox4a: aeTCH when it overheats.

Leakage through the main valve depends on the quality of workmanship and YOUR location of the surfaces of the seat and the main valve. Significant} / disadvantage of the known thermostat is the presence of a rigid fastening of the stem end (piston) of the thermosyuid sensor in the holder, which leads to a distortion of the contact surfaces of the main valve and the seat during the operation of the thermostat and, r: aj-: as a result, the appearance of additional leakage.

The technical task of the utility model is to reduce unwanted leakage by eliminating the skew of the conted surfaces; the main one: lalan and saddle during operation of the thermostat.

The technical result of the utility model is achieved by the fact that the end of the stem of the thermo-force sensor has a spherical surface that constantly abuts against the end plane or the contour surface of the adjusting screw, 1 neck; its axial movement along the thread in the thermostat cover.

Figure 1 shows the design of the proposed thermostat. It consists of a housing 1 and a cover 2, connected: between themselves screwdrivers (not shown). In the cover 2, with the help of support 3, a thermocouple is fixed, which includes a thermopower sensor 4 with a rod 5, resting its spherical surface against the end face flat in the KOHiwecK no surface of the adjusting screw 6 (see fig. 3), which has the possibility of axial movements on the thread in the cover 2 of the thermostat. On the thermal power sensor 4, in which a thermal wax is used as a thermosensitive element, the main K1 valve 7 is pressed in, which is pressed by the base surface B to the seat 8 and 2 spring 9. On the thermal power sensor 4 there is a bypass valve 10 pressed by spring 11 to the lock washer 12. Since end

rod 5 of the thermosid sensor 4 1Sh9 has a spherical surface (see fig. 2,3), constantly abutting against the end face flat 11pi against the conical surface of the adjusting screw b, then the main valve 7 interacts with the seat 8 along their contact surfaces without distortions.

The thermostat works as it should.

On a cold engine, at a coolant temperature below the main thermostat valve is closed, and the bypass valve 10 is open. I am cooling the liquid circulating the engine and through the bypass valve 10, the pump is again fed to the engine (small circle circulating) bypassing the radiator. This ensures a quick warm-up of the engine.

If the temperature of the liquid is higher than 85 ° C, the thermal wax in the thermal power sensor 4 melts, increasing in volume, and pushes the stem 5 of the thermal power sensor 4. The main valve 7 starts to open, and the bypass valve 10 closes.

When the temperature of the LRG is higher, the thermal wax expands, increasing in volume, and pushes the thermo-power sensor 4 due to a significant increase in the extension A of the rod 5. In this case, the main valve 7 will open completely, and the bypass valve 10 will completely close. The liquid will circulate the engine willows through the radiator to the thermostat, and then through the main valve 7 to the pump and to the engine (large circle circulating).

The proposed thermostat for engine cooling systems is commercially available Orlovskgol CJSC ORLEX. The technical effect of using the utility model in comparison with the prototype was obtained by eliminating unwanted leaks and, as a result, increasing the life of the car engine.

Claims (1)

The thermostat has a body and a cover rigidly interconnected, inside of which there is a spring-loaded between the main valve abutting against the seat of the cover and a cover support thermosensor, abutting the rod against the top at the top and having a bypass valve spring-loaded between the lock washer and the case of the heat-power sensor, the course of which is limited by the saddle of the housing, characterized in that the end of the stem of the thermal power sensor has a spherical surface, which constantly abuts against the end face flat or in a conical surface ited adjusting screw having an axially movable threaded into the cap of the thermostat.