CN114687830A - A temperature-sensing thermostat device for an integrated bypass valve in an oil filter module - Google Patents

Abstract

The invention relates to a temperature-sensing thermostat device for an integrated bypass valve in an oil filter module, which comprises a shell, a temperature-sensing element assembly and a telescopic limiting piece, wherein the temperature-sensing element assembly is arranged in a cavity of the shell and is limited by the telescopic limiting piece; the temperature sensing element assembly comprises a piston, a temperature sensing element and a bypass valve assembly, the piston is slidably mounted in the shell cavity, the temperature sensing element is mounted at one end of the piston, and the piston opens or closes the oil inlet under the limiting action of the temperature sensing element and the telescopic limiting piece; the bypass valve assembly is mounted on the piston and used for closing or opening the bypass through hole in the middle of the piston. The integrated thermostat device of the invention removes a bracket, saves space, increases the sectional area of the bypass valve and reduces flow resistance.

Description

A temperature-sensing thermostat device for an integrated bypass valve in an oil filter module

technical field

The invention relates to the technical field of automobile engine cooling, in particular to a temperature-sensing thermostat device for integrating a bypass valve in an oil filter module.

Background technique

The patent CN211422724U introduces a temperature-sensing integrated thermostat device used in the oil module, which is integrated through the bracket structure to realize the integration of the thermostat temperature-sensing element assembly and the bypass valve assembly, which can be directly passed through The thread on the bracket, rotating installation and disassembly, improves the shortage of the traditional temperature-sensing thermostat and optimizes the installation process, but the structure of the device is complicated, the cost of the bracket is high, and the bypass valve assembly is coupled with the piston through the bypass valve seat Connected together, the bypass valve plate space is limited in the bypass valve seat, resulting in too small flow cross-sectional area and high oil resistance.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a temperature-sensing thermostat device for integrating a bypass valve in an oil filter module in order to solve the above problems.

The object of the present invention is achieved through the following technical solutions:

A temperature-sensing thermostat device for integrating a bypass valve in an oil filter module, comprising a housing, a temperature-sensing element assembly and a retractable limit piece, the temperature-sensing element assembly being mounted on the housing inside the cavity, and is limited by a telescopic limiter installed at one end of the cavity of the casing, the casing is respectively provided with an oil inlet and a filter inlet; the temperature sensing element assembly includes a piston, a temperature A sensing element and a bypass valve assembly, the piston is slidably mounted in the housing cavity, the temperature sensing element is mounted on one end of the piston, and the piston is located between the temperature sensing element and the retractable limit The oil inlet is opened or closed under the action of the limit of the parts; a bypass hole is arranged in the middle of the piston, and the bypass valve assembly is installed on the piston to close or open the bypass hole in the middle of the piston. through-hole.

Further, the piston divides the cavity in the housing into an oil inlet chamber and an oil outlet chamber, and the retractable stopper is located in the oil outlet chamber.

Further, the temperature sensing element is in the shape of a screw and is axially installed in the middle of the piston. The end of the temperature sensing element located in the oil inlet chamber is provided with an elongated top rod, and the top rod is installed in the oil inlet chamber. the inner wall of one end of the oil inlet chamber.

Further, the ejector rod is made of a high-temperature expansion material. When the temperature is too high, the temperature sensing element expands, and the piston moves under the action of the ejector rod.

Further, the bypass valve assembly is installed on the other end of the temperature sensing element corresponding to the ejector rod, and includes a bypass valve plate and a bypass valve spring, and the bypass valve plate is sleeved at the temperature on the sensing element, and is limited by the bypass valve spring, the other end of the bypass valve spring is limited by a blocking plate provided at the end of the temperature sensing element, and the bypass valve spring is in a compressed state.

Further, the piston is in the shape of a casing, one end is tapered, and a bypass hole is provided in the middle. Under normal working conditions, the bypass valve plate is pressed against the piston under the action of the bypass valve spring. , close the bypass hole.

Further, the blocking piece is riveted to the piston through a flange.

Further, the oil inlet is arranged in the oil inlet chamber, and the filter element inlet is arranged in the oil outlet chamber.

Further, the retractable limit member is a limit spring, the limit spring is in a compressed state, one end of the limit spring is limited by the inner wall of the housing cavity, and the other end is limited by the temperature sensing element assembly. The temperature sensing element assembly has thrust.

Further, the casing is cylindrical, and the inner wall is provided with a sliding surface that guides the piston.

The specific working principle of the device of the present invention is:

Under normal conditions, the piston is in the open state, that is, when the temperature of the oil introduced through the oil inlet is lower than the set value, the piston does not close the oil flow port under the action of the retractable stopper, and the oil entering the housing chamber can pass through. The inlet of the filter element leads to the filter element; part of the oil can enter the cooler, and the oil flow into the filter element inlet and the cooler depends on the flow rate of the oil from the oil inlet.

When the high temperature oil is introduced into the oil inlet (when the oil temperature is higher than the set value), the temperature sensing element expands due to the temperature rise and pushes the piston to move, and the piston closes the oil inlet. At this time, the high temperature oil cannot enter and exit from the oil inlet chamber. The oil chamber, that is, the high-temperature oil needs to enter the inlet of the cooler. The oil is cooled to a certain temperature by the cooler and then reaches each lubrication point to ensure the lubrication effect of the lubrication point and prolong the life of the oil.

When the oil inlet chamber is fed with high-temperature oil, the piston closes the oil flow port, and the filter element inlet is closed. Into the filter element, the engine will have no oil to use, this situation should be avoided. The bypass valve assembly in this device works, that is, if this situation occurs, when the pressure difference between the oil inlet and the lubricating end rises to the set opening pressure, the high-pressure oil in the oil inlet chamber acts on the bypass valve plate. The bypass valve plate moves, the bypass hole on the piston opens, and the oil passes through and enters the filter element inlet, so as to avoid the above problems, keep the oil in the engine lubrication system, and protect the parts that need to be lubricated during engine operation.

Compared with the prior art, the present invention has the following advantages:

1. Compared with the integrated bracket structure used in the temperature-sensing integrated thermostat device used in the oil module disclosed in the patent CN211422724U, the integrated thermostat device of the present invention removes the bracket, saves space, and increases the bypass valve cutoff. Area reduces flow resistance.

2. The bypass valve assembly disclosed in the patent CN211422724U for the temperature sensing integrated thermostat device in the oil module includes the bypass valve plate, the bypass valve seat, the bypass valve spring and the temperature sensing element assembly through the piston Compared with the technical scheme of coupling and connecting together, the bypass valve seat of the integrated thermostat device of the present invention is changed to a baffle plate and the lower end of the temperature sensing element is flanged and riveted, the baffle plate structure is simpler, and the cost is reduced.

Description of drawings

1 is a schematic structural diagram of a temperature sensing element assembly and a retractable limiting member of the device of the present invention;

2 is a schematic diagram of the open state of the piston of the device of the present invention;

Fig. 3 is the schematic diagram of the closed state of the piston of the device of the present invention;

4 is a schematic diagram of the open state of the bypass valve of the device of the present invention;

Figure 5 is a schematic diagram of the working principle.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figure 1-4, a temperature-sensing thermostat device for integrating a bypass valve in an oil filter module includes a housing 1, a temperature-sensing element assembly and a retractable limiter. The temperature-sensing element assembly is installed In the cavity of the casing 1 , the position is limited by a telescopic limiter installed at one end of the cavity of the casing 1 . The telescopic limiter is a limit spring 4, the limit spring 4 is in a compressed state, one end of which is limited by the inner wall of the casing 1, and the other end is limited by the temperature sensing element assembly, which has a thrust to the temperature sensing element assembly .

The temperature sensing element assembly includes a piston 2, a temperature sensing element 3 and a bypass valve assembly. The piston 2 is slidably installed in the cavity of the housing 1, and the temperature sensing element 3 is installed at one end of the piston 2. The piston 2 is located between the temperature sensing element 3 and the Under the action of the retractable stopper, the oil inlet 8 is opened or closed; there is a bypass hole in the middle of the piston 2, and the bypass valve assembly is installed on the piston 2 to close or open the bypass hole in the middle of the piston 2 . The integrated thermostat device of the invention removes the bracket, saves space, increases the cross-sectional area of the bypass valve and reduces the flow resistance.

Specifically, the piston 2 divides the cavity in the casing 1 into an oil inlet chamber and an oil outlet chamber, the retractable stopper is located in the oil outlet chamber, and the casing 1 is respectively provided with an oil inlet 8 and a filter element inlet 9 , the oil inlet 8 is arranged in the oil inlet chamber, and the filter element inlet 9 is arranged in the oil outlet chamber.

The temperature sensing element 3 is in the shape of a screw and is axially installed in the middle of the piston 2. The end of the temperature sensing element 3 located in the oil inlet chamber is provided with an elongated ejector rod 301, and the ejector rod 301 is installed on the inner wall of one end of the oil inlet chamber. When the temperature is too high, the temperature sensing element 3 expands, and the piston 2 moves under the action of the ejector rod 301 .

The casing 1 is cylindrical, and the inner wall is provided with a sliding surface that guides the piston 2 . The bypass valve assembly is installed on the other end of the temperature sensing element 3 corresponding to the ejector rod 301, and includes a bypass valve plate 5 and a bypass valve spring 6. The bypass valve plate 5 is sleeved on the temperature sensing element 3 and is bypassed. The through valve spring 6 is limited, and the other end of the bypass valve spring 6 is limited by the blocking piece 7 disposed at the end of the temperature sensing element 3, and the bypass valve spring 6 is in a compressed state. The piston 2 is in the shape of a shell, one end is cone-shaped, and there is a bypass hole in the middle. Under normal working conditions, the bypass valve plate 5 is pressed against the piston 2 under the action of the bypass valve spring 6 to close the bypass hole. , the baffle 7 is riveted with the piston 2 by flanging, and the bypass valve seat is changed to the baffle 7 and the lower end of the temperature sensing element to be riveted by the flange, the structure of the baffle 7 is simpler, and the cost is reduced.

The specific working principle of the device of the present invention is:

As shown in Fig. 2, in the normal state, the piston 2 is in the open state, that is, when the temperature of the oil introduced through the oil inlet 8 is lower than the set value, the piston 2 does not close the oil flow port under the action of the retractable limiter, and enters the The oil in the chamber of the housing 1 can pass into the filter element through the filter element inlet 9; part of the oil can enter the cooler, and the oil flow into the filter element inlet 9 and the cooler depends on the oil flow from the oil inlet 8.

As shown in Fig. 3, when the oil inlet 8 is fed with high-temperature oil (when the oil temperature is higher than the set value), the temperature sensing element 3 expands due to the temperature rise, and pushes the piston 2 to move under the action of the ejector rod 301, and the piston 2 closes the inlet. The oil inlet 8, at this time, the high temperature oil cannot enter the oil outlet chamber from the oil inlet chamber, that is, the high temperature oil is prevented from entering the filter element through the filter inlet 9, so as to ensure the lubrication effect of the lubricating point and prolong the oil life.

As shown in Figure 4, when the oil inlet chamber is fed with high temperature oil, the piston 2 closes the oil flow port, and the filter element inlet 9 is closed at this time. , if no oil enters the filter element at this time, the engine will have no oil to use, which should be avoided. The bypass valve assembly in this device works, that is, if this situation occurs, when the pressure difference between the oil inlet 8 and the lubricating end rises to the set opening pressure, the high-pressure oil in the oil inlet chamber acts on the bypass valve plate 5, the bypass valve plate 5 moves, the bypass hole on the piston 2 is opened, the oil passes through, and enters the filter element inlet 9, so as to avoid the above problems, keep the organic oil in the engine lubrication system, and make the engine run. Lubricated parts are protected.

5 is a schematic diagram of the working principle of the device being applied to an automobile engine module, that is, the oil in the oil tank passes through the cooler and the device of the present invention and passes into the filter element for filtering, and then passes into the engine for use after filtering, and the used oil returns to the oil tank In this cycle, the temperature-sensing integrated thermostat device is provided in the present invention in order to realize the temperature regulation and pressure regulation of the oil. The invention can not only realize the functions of synchronous temperature adjustment and pressure adjustment, but also does not need to consider the installation positions of the temperature sensing element assembly and the bypass valve assembly respectively, so the shell structure for installing the temperature sensing integrated thermostat device is also obtained. Optimized to save design space.

The foregoing description of the embodiments is provided to facilitate understanding and use of the invention by those of ordinary skill in the art. It will be apparent to those skilled in the art that various modifications to these embodiments can be readily made, and the generic principles described herein can be applied to other embodiments without inventive step. Therefore, the present invention is not limited to the above-mentioned embodiments, and improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should all fall within the protection scope of the present invention.

Claims (10)

1. A temperature-sensing thermostat device for an integrated bypass valve in an oil filter module is characterized by comprising a shell, a temperature-sensing element assembly and a telescopic limiting piece, wherein the temperature-sensing element assembly is installed in a cavity of the shell and is limited by the telescopic limiting piece installed at one end of the cavity of the shell, and the shell is respectively provided with an oil inlet and a filter element inlet;

the temperature sensing element assembly comprises a piston, a temperature sensing element and a bypass valve assembly, the piston is slidably mounted in the shell cavity, the temperature sensing element is mounted at one end of the piston, and the piston opens or closes the oil inlet under the limiting action of the temperature sensing element and the telescopic limiting piece;

the bypass valve assembly is mounted on the piston and used for closing or opening the bypass through hole in the middle of the piston.

2. The thermostat device of claim 1 wherein said piston divides a cavity in said housing into an oil inlet chamber and an oil outlet chamber, said retractable stop being located in said oil outlet chamber.

3. A thermostat device for an integrated bypass valve in an oil filter module according to claim 2, characterized in that the temperature-sensitive element is in the shape of a screw mounted axially in the middle of the piston,

the temperature sensing element is positioned at the end part in the oil inlet cavity and is provided with a slender ejector rod, and the ejector rod is arranged on the inner wall of one end of the oil inlet cavity.

4. The thermostat device of claim 3, wherein the plunger is made of a high temperature expansion material, and when the temperature is too high, the temperature sensing element expands and the piston moves under the action of the plunger.

5. The temperature-sensing thermostat device for the integrated bypass valve in the oil filter module according to claim 3, wherein the bypass valve assembly is installed at the other end of the temperature-sensing element corresponding to the ejector rod, and includes a bypass valve plate and a bypass valve spring, the bypass valve plate is sleeved on the temperature-sensing element and is limited by the bypass valve spring, the other end of the bypass valve spring is limited by a baffle piece arranged at the end of the temperature-sensing element, and the bypass valve spring is in a compressed state.

6. The thermostat device of claim 5, wherein the piston is in the shape of a housing, one end of the piston is conical, a bypass through hole is formed in the middle of the piston, and the bypass valve plate is pressed against the piston by the bypass valve spring to close the bypass through hole under normal operation.

7. The thermostat device of claim 5, wherein said flap is riveted to said piston by a crimp.

8. The thermostat device of claim 2, wherein the inlet feed inlet is disposed in the inlet feed chamber and the filter inlet is disposed in the outlet feed chamber.

9. The thermostat device of claim 1, wherein the retractable stop is a stop spring, and the stop spring is in a compressed state, and has one end thereof stopped by the inner wall of the housing cavity and the other end thereof stopped by the temperature-sensing element assembly, and has a pushing force on the temperature-sensing element assembly.

10. The thermostat device of claim 1, wherein the housing is cylindrical and has an inner wall with a sliding surface for guiding the piston.

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