Thermostat wax package structure suitable for high-temperature, high-pressure and high-vibration environment

Abstract

The utility model discloses a thermostat wax package structure suitable for a high-temperature, high-pressure and high-vibration environment, which belongs to the field of thermostat wax package structures and comprises a cylinder sleeve for containing paraffin, a cylinder cap for plugging a port of the cylinder sleeve and a push rod penetrating through the cylinder cap and inserted into the cylinder sleeve. A sealing body used for being arranged on the push rod in a sleeving mode is arranged on the end opening side of the barrel sleeve, the sealing body is cylindrical, a groove is formed in the sealing body, and the groove is specially designed. The grooves comprise first grooves located in the two end faces of the sealing body. The second groove is positioned on the outer ring surface of the sealing body; and / or the diameter of the third groove push rod on the inner ring surface of the sealing body is changed from 4mm to 6mm. The thermostat wax package structure is low in cost and suitable for high-temperature, high-pressure and high-vibration environments.

Description

Technical Field

[0001] The utility model mainly relates to the field of thermostat wax package structures, and specifically relates to a thermostat wax package structure suitable for high-temperature, high-pressure and high-vibration environments. Background Technique

[0002] The wax-type thermostat is a commonly used temperature control device in the automobile engine cooling system. It controls the flow of the coolant through temperature changes, thereby regulating the working temperature of the engine. The wax package structure is its core part, mainly including a sleeve member for containing paraffin wax and a push rod inserted on the sleeve member. When the temperature of the engine coolant is relatively low, the wax is in a solid state, with a small volume, and the push rod is in a contracted state, and the valve is closed, preventing the coolant from flowing through the radiator of the engine, so that the engine can quickly warm up; when the coolant temperature rises to a certain degree, the wax begins to melt and expand, pushing the push rod to extend relative to the sleeve, thereby opening the valve and allowing the coolant to flow through the radiator for heat dissipation.

[0003] When the traditional thermostat wax package structure is applied in high-temperature, high-pressure and high-vibration environments, problems such as wax leakage in the sealing structure and misadjustment of the initial fully open temperature are likely to occur. The general solution is to use materials that are more resistant to high temperature and high pressure to manufacture the thermostat housing and internal components, which increases the cost. Therefore, it is necessary to develop a thermostat wax package structure with less cost suitable for high-temperature, high-pressure and high-vibration environments. Content of the Utility Model

[0004] The technical solution of the utility model aims at the technical problem that the existing technical solution is too single, and provides a solution significantly different from the existing technology. It mainly provides a thermostat wax package structure suitable for high-temperature, high-pressure and high-vibration environments, so as to solve the technical problem that the thermostat wax package structure is adapted to high-temperature, high-pressure and high-vibration environments through improvement means with less cost as mentioned in the above background technique.

[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0006] A thermostat wax package structure suitable for high-temperature, high-pressure and high-vibration environments includes a sleeve for containing paraffin wax, a cap for plugging the port of the sleeve, and a push rod passing through the cap and inserted in the sleeve; a sealing body for sleeving on the push rod is arranged on the side of the sleeve port, the sealing body is cylindrical, and a groove is formed on the sealing body.

[0007] Specifically, the groove includes a first groove located on both end faces of the sealing body;

[0008] and / or, a second groove located on the outer circumferential surface of the sealing body;

[0009] and / or, a third groove located on the inner circumferential surface of the sealing body.

[0010] Preferably, the first groove is a circular groove coaxially arranged with the end face where it is located, and its cross section is arc-shaped.

[0011] Preferably, the second groove extends along the outer circumferential surface of the seal body, and its width decreases along the groove depth direction.

[0012] Preferably, the third groove extends along the inner circumferential surface of the seal body, and its cross section is arc-shaped.

[0013] Preferably, the material of the seal body is hydrogenated nitrile rubber.

[0014] Furthermore, a guiding ring for sleeving on the push rod is arranged between the seal body and the barrel cap, and the guiding ring is in a ring structure.

[0015] Preferably, the guiding ring is made of a composite material with 25% carbon fiber added to PTFE.

[0016] Furthermore, the diameter of the push rod is 6 mm.

[0017] Furthermore, a push rod cap for connecting to the valve seat is sleeved on the outer end of the push rod, and clamping grooves are evenly formed on the circumferential side of the push rod.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] In the thermostat wax package structure provided by the present utility model, the material of the seal body inside is HNBR (hydrogenated nitrile rubber), which is more heat-resistant than ordinary rubber; the seal body is cylindrical. Compared with the existing water-drop-shaped seal body (the compression amount is only about 10%, and the seal body will soften under high temperature and high pressure, and only the compression amount can be increased to ensure the sealing performance, but increasing the compression amount of the water-drop-shaped seal body will make the wax package assembly difficult), it can increase the compression amount and does not affect the installation. Moreover, grooves are formed on the seal body of the present utility model, which can increase the compression amount of the seal body, avoid serious deformation and rupture of the seal body, so as to better adapt to the high-pressure environment; at the same time, the requirement for the high-pressure resistance performance of the seal body material is reduced, and compared with using materials with higher heat and high-pressure resistance, the cost can be reduced.

[0020] In the optimized scheme of the present utility model, the diameter of the push rod is changed from 4 mm to 6 mm, making the push rod structure stronger and capable of withstanding greater forces without bending or damage, which is particularly important in a high-temperature environment because the temperature increase may cause the material to soften; at the same time, increasing the diameter of the push rod can also meet the strength requirements of the push rod under high pressure and high vibration conditions when using a main valve disc with a larger diameter. In addition, the cylindrical seal body can also better adapt to the push rod.

[0021] In the present utility model, the opening positions and structures of the grooves on the sealing body are also designed. The grooves are located on the surface of the sealing body, which is convenient for molding and processing. Each groove has an annular structure coaxial with the sealing body. When grooves are provided on the side surface and through hole of the sealing body, a special encircling area will be formed. Since the liquid in the encircling area is incompressible, the pressure therein is much higher than the working pressure in the copper sleeve. When the push rod extends outwards, it forces the liquid in the "encircling area" to be pressed back into the copper sleeve, thus forming a reliable sealing state. At the same time, it is also convenient for molding and processing.

[0022] The present utility model will be explained and described in detail below in conjunction with the drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0024] Figure 2 is a longitudinal sectional view of the present utility model;

[0025] Figure 3 is a three-dimensional structural schematic diagram of the sealing body in the present utility model;

[0026] Figure 4 is a longitudinal sectional view of the sealing body in the present utility model.

[0027] Reference numerals: 1, valve seat; 2, main valve disc; 3, guide ring; 4, barrel sleeve; 5, push rod; 6, sealing body; 61, first groove; 62, second groove; 63, third groove; 7, barrel cap; 8, push rod cap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0029] It should be noted that when an element is referred to as being "fixed on" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model pertains. The terms used in the description of this utility model in this specification are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] Embodiment 1: Please refer to the attached Figure 1 and the attached Figure 2 , a thermostat wax package structure applicable to high-temperature, high-pressure, and high-vibration environments, comprising:

[0032] A barrel sleeve 4, with one end open, for containing paraffin wax, and the material is copper;

[0033] A barrel cap 7, riveted on the port of the barrel sleeve 4, for sealing the port of the barrel sleeve 4, and the material is copper;

[0034] A push rod 5, with one end passing through the barrel cap 7 and inserted into the barrel sleeve 4, located on the center line of the barrel sleeve 4; the diameter of the push rod 5 is 6 mm. A larger diameter of the push rod 5 means a stronger structure, capable of withstanding higher forces without bending or damage. This is particularly important in high-temperature environments because temperature rise may cause the material to soften; at the same time, increasing the diameter of the push rod 5 can also meet the strength requirements of the push rod 5 in high-pressure and high-vibration situations when using a main valve disc 2 with a larger diameter;

[0035] A seal body 6, located on the side of the port of the barrel sleeve 4, sleeved on the push rod 5, for sealing the gap at the port of the barrel sleeve 4; the seal body 6 is cylindrical to better adapt to the new-sized push rod 5 (the compression amount of the existing water-drop-shaped seal body 6 is only about 10%. High temperature and high pressure will cause the seal body 6 to soften, and only by increasing the compression amount can the sealing performance be ensured. However, increasing the compression amount of the water-drop-shaped seal body 6 will make the wax package assembly difficult. Therefore, the shape is changed from water-drop-shaped to cylindrical. The compression amount of the cylindrical seal body 6 is 22% and it does not affect the installation); and a groove is formed on the seal body 6 to increase the compression amount of the seal body 6 and prevent the seal body 6 from deforming severely and cracking to adapt to the high-pressure environment; the material of the seal body 6 is HNBR (hydrogenated nitrile butadiene rubber), which is more heat-resistant than ordinary rubber; in this embodiment, the groove includes a second groove 62 located on the outer ring surface of the seal body 6 and a third groove 63 located on the inner ring surface of the seal body 6. The second groove 62 extends along the outer ring surface of the seal body 6, and its width decreases along the groove depth direction (the width is the largest at the groove opening); the third groove 63 extends along the inner ring surface of the seal body 6, and its cross-section is arc-shaped (the width of the central hole of the seal body 6 decreases from both ends to the middle);

[0036] The push rod cap 8 is sleeved on the outer end of the push rod 5 and is used to connect the push rod 5 and the valve seat 1. The push rod 5 is evenly provided with clamping grooves along its circumferential side. When the push rod cap 8 and the valve seat 1 are installed, they are in clearance fit. After the push rod cap 8 is extruded and deformed by a tooling, the push rod cap 8 changes from a circle to an ellipse, is clamped in the installation hole of the valve seat 1, and at the same time, is also clamped in the clamping groove on the push rod 5, so that the two parts are fixed together to prevent the push rod 5 from shifting during vibration.

[0037] Embodiment 2: The difference between this embodiment and Embodiment 1 is that:

[0038] In this embodiment, please refer to the attached Figure 2 , a guiding ring 3 for sleeving on the push rod 5 is provided between the sealing body 6 and the barrel cap 7, and the guiding ring 3 is in a ring structure; the guiding ring 3 is made of a composite material with 25% carbon fiber added to PTFE (polytetrafluoroethylene) to ensure that it is not easily deformed when playing a guiding role.

[0039] In this embodiment, please refer to the attached Figure 3 and the attached Figure 4 , the grooves on the sealing body 6 include a first groove 61 located on both end faces of the sealing body 6, a second groove 62 located on the outer ring face of the sealing body 6, and a third groove 63 located on the inner ring face of the sealing body 6. The first groove 61 is a circular groove coaxial with the end face where it is located, and its cross section is arc-shaped; the second groove 62 extends along the outer ring face of the sealing body 6, and its width decreases along the groove depth direction (the width is the largest at the groove opening); the third groove 63 extends along the inner ring face of the sealing body 6, and its cross section is arc-shaped (the width of the central hole of the sealing body 6 decreases from both end faces to the middle).

[0040] When installing the thermostat, first pour paraffin into the barrel sleeve 4, then sequentially place the sealing body 6 and the guiding ring 3, then rivet the barrel sleeve 4 and the barrel cap 7, and press the push rod 5 into the wax package; then press-connect the wax package structure and the main valve disc 2, and finally connect the push rod 5 and the valve seat 1.

[0041] The above has made an exemplary description of the present invention in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as this non-substantial improvement is made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A thermostat wax package structure suitable for high-temperature, high-pressure and high-vibration environments, comprising a sleeve (4) for containing paraffin wax, a sleeve cap (7) for blocking the port of the sleeve (4), and a push rod (5) passing through the sleeve cap (7) and inserted into the sleeve (4); characterized in that: A sealing body (6) for sleeving on a push rod (5) is provided on the port side of the barrel sleeve (4). The sealing body (6) is cylindrical, and a groove is formed on the sealing body (6).

2. The thermostat wax package structure applicable to high-temperature, high-pressure and high-vibration environments according to claim 1, characterized in that: The groove includes a first groove (61) located on both end faces of the sealing body (6); and / or, a second groove (62) located on the outer ring surface of the sealing body (6); and / or, a third groove (63) located on the inner ring surface of the sealing body (6).

3. A thermostat wax package structure applicable to high-temperature, high-pressure, and high-vibration environments according to claim 2, characterized in that: The first groove (61) is a circular groove coaxially arranged with the end face where it is located, and its cross section is arc-shaped.

4. The thermostat wax package structure applicable to high-temperature, high-pressure, and high-vibration environments according to claim 2, characterized in that: The second groove (62) extends along the outer ring surface of the sealing body (6), and its width decreases along the groove depth direction.

5. The thermostat wax package structure applicable to high-temperature, high-pressure and high-vibration environments according to claim 2, wherein: The third groove (63) extends along the inner ring surface of the sealing body (6), and its cross section is arc-shaped.

6. The thermostat wax package structure applicable to high-temperature, high-pressure and high-vibration environments according to claim 1, characterized in that: The material of the sealing body (6) is hydrogenated nitrile rubber.

7. A thermostat wax package structure applicable to high-temperature, high-pressure and high-vibration environments according to any one of claims 1-6, characterized in that: A guide ring (3) for sleeving on the push rod (5) is provided between the sealing body (6) and the barrel cap (7). The guide ring (3) is in a ring structure.

8. The thermostat wax package structure applicable to high-temperature, high-pressure and high-vibration environments according to claim 1, characterized in that: The diameter of the push rod (5) is 6 mm.

9. The thermostat wax package structure applicable to high-temperature, high-pressure and high-vibration environments according to claim 8, characterized in that: A push rod cap (8) for connecting to the valve seat (1) is sleeved on the outer side end of the push rod (5), and clamping grooves are uniformly formed on the circumferential side of the push rod (5).

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