Heating device and oil-gas separator

Abstract

The utility model discloses a heating device and an oil-gas separator, and relates to the technical field of crankcase ventilation systems. The heating device comprises a heat conductor and a PTC heater used for heating the heat conductor, the heat conductor comprises a heat conduction section, an upper connecting section arranged at the upper end of the heat conduction section and a lower connecting section arranged at the lower end of the heat conduction section, and the heat conductor is provided with an oil return hole penetrating through the upper connecting section, the heat conduction section and the lower connecting section from top to bottom. The upper connecting section is used for being connected with an oil return opening of the oil-gas separator, and the lower connecting section is used for being connected with an oil return pipe. The PTC heater comprises two heating shells, the two heating shells are connected through a locking piece and jointly define an installation cavity matched with the heat conduction section, and the PTC heater is fixedly arranged on the heat conduction section in a sleeving mode through the installation cavity. According to the heating device and the oil-gas separator, the problem that an oil return opening of the oil-gas separator is iced and blocked is solved, and normal work of the oil-gas separator is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of crankcase ventilation systems, in particular to a heating device and an oil-gas separator. Background Art

[0002] When a natural gas engine is working, part of the combustible mixture and combustion products will leak into the crankcase through the cylinder and piston ring. Due to the drop in temperature, part of the leaked gas will condense in the engine oil, making the engine oil thinner and the performance worse, and forming foam, affecting the lubrication quality; the other part will generate acids when it comes into contact with water, corroding machine parts and causing the lubricating oil to deteriorate; at the same time, the leaked gas will cause the crankcase pressure and temperature to rise, causing the engine oil to leak from the oil seal and gasket. Therefore, the crankcase is equipped with a ventilation device to discharge the leaked gas and recover the engine oil, while allowing fresh air to enter the crankcase to form continuous convection and balance the pressure in the crankcase.

[0003] Due to the high water content in the crankcase blowby gas of natural gas engines, the ambient temperature in some cold areas in Northeast China can often drop to -40℃ in winter. When natural gas heavy trucks are used in this environment, the crankcase ventilation system often becomes blocked by ice, causing the crankcase ventilation system to fail and the crankcase pressure to increase abnormally. This can cause oil leakage from the oil seals and gaskets at various joints of the engine, excessive engine oil consumption, and blue smoke from the exhaust. In severe cases, it can even cause oil splashing from the oil dipstick, oil pan cracking, cylinder scratching and other serious faults.

[0004] The oil-gas separator is a major component of the crankcase ventilation system. Its function is to efficiently separate the oil in the crankcase blowby gas. Its separation performance has an important impact on the reliability and emissions of the engine. Based on our company's failure analysis of natural gas engines in cold areas, ice blockage often occurs at the oil return port of the oil-gas separator. The water vapor and oil in the crankcase blowby gas are separated and gathered in the lower shell of the oil-gas separator. Because the ambient temperature is too low, it gradually freezes and blocks the oil return port of the oil-gas separator, causing the entire crankcase ventilation system to fail over time. Utility Model Content

[0005] In view of the above defects in the prior art, the first purpose of the utility model is to provide a heating device, which solves the problem of ice blockage at the oil return port of the oil-gas separator and ensures the normal operation of the oil-gas separator.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A heating device comprises a heat conductor and a PTC heater for heating the heat conductor, wherein the heat conductor comprises a heat conducting section, an upper connecting section arranged at the upper end of the heat conducting section and a lower connecting section arranged at the lower end of the heat conducting section, and the heat conductor has an oil return hole that penetrates the upper connecting section, the heat conducting section and the lower connecting section from top to bottom, the upper connecting section is used to be connected to the oil return port of an oil-gas separator, and the lower connecting section is used to be connected to the oil return pipe; the PTC heater comprises two heating shells, the two heating shells are connected by a locking piece and the two shells together form an installation cavity adapted to the heat conducting section, and the PTC heater is fixedly sleeved on the heat conducting section through the installation cavity.

[0008] Wherein, a non-return structure is arranged in the heat conduction section, and the non-return structure is used to prevent the oil and gas in the oil return pipe from flowing back into the oil and gas separator.

[0009] Wherein, the heat-conducting section includes an upper heat-conducting section connected to the upper connecting section and a lower heat-conducting section connected to the lower connecting section, the upper heat-conducting section and the lower heat-conducting section are detachably connected and the two together form a sealed cavity, and the non-return structure includes an elastic rubber ball arranged in the sealed cavity, and the elastic rubber ball is used to open or block the oil return hole in the upper heat-conducting section.

[0010] Among them, the upper heat-conducting section is protrudingly provided with a threaded connection part, and the lower heat-conducting section has a threaded hole. The threaded connection part is threadedly connected to the threaded hole and the two together form the sealed cavity; a guide limit groove is provided on the threaded connection part, and a support platform is protrudingly provided at the bottom of the threaded hole. The oil return hole passes through the guide limit groove and the support platform, and a guide groove connecting the sealing cavity and the oil return hole is provided on the support platform, and the elastic rubber ball is located between the guide limit groove and the support platform.

[0011] Wherein, a sealing cavity sealing structure for sealing the sealing cavity is arranged between the threaded connection portion and the hole wall of the threaded hole.

[0012] Wherein, the upper connecting section is provided with a threaded structure for connecting with the oil return port and an oil return port sealing structure for sealing the oil return port.

[0013] Among them, a heat-conducting joint is provided on the upper connecting section, one end of the heat-conducting joint is connected to the upper connecting section, and the other end of the heat-conducting joint is used to heat the inside of the oil-gas separator, and the heat-conducting joint is provided with an oil return channel for connecting the oil-gas separator and the oil return hole.

[0014] Wherein, the heat-conducting joint is a heat-conducting tube with openings at both ends, one end of the heat-conducting tube is threadedly connected to the upper connecting section, and the other end of the heat-conducting joint is used to extend into the lower shell of the oil-gas separator; a heat-conducting tube opening connected to its inner hole is opened on the side wall of the heat-conducting tube, and the heat-conducting tube opening and the inner hole of the heat-conducting tube constitute the oil return channel.

[0015] Wherein, the heat-conducting joint is a conical heat-conducting bucket, which includes a connecting head and a heat-conducting bucket body arranged on the connecting head, the connecting head is threadedly connected to the upper connecting section, and the heat-conducting bucket body is used to extend into the lower shell of the oil-gas separator; the connecting head is provided with a through hole passing through the connecting head and a connecting head opening connected to the through hole, and the connecting head opening and the through hole constitute the oil return channel.

[0016] By adopting the above technical solution, the beneficial effects of the utility model are:

[0017] The heating device provided by the utility model is connected to the oil return port of the oil-gas separator through the upper connecting section of the heat conductor, and the heat conductor is heated by the PTC heater. The heat conductor continuously conducts heat to the lower shell of the oil-gas separator, thereby preventing the oil-water mixture inside the oil-gas separator from freezing, thereby solving the problem of ice blockage of the oil return port of the oil-gas separator and ensuring the normal operation of the oil-gas separator. Compared with the prior art, the heating device of the utility model not only solves the problem of ice blockage of the oil return port of the oil-gas separator and ensures the normal operation of the oil-gas separator, but also the heating device can be directly installed on the existing oil return port of the oil-gas separator, without the need to modify the oil-gas separator, and is easy and quick to implement. At the same time, the use of the PTC heater improves the safety during heating.

[0018] The second purpose of the utility model is to provide an oil-gas separator, which solves the problem of ice blockage of the oil return port and ensures normal operation.

[0019] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0020] An oil-gas separator, wherein the oil return port of the oil-gas separator is provided with the heating device described in the above technical solution.

[0021] By adopting the above technical solution, the beneficial effects of the utility model are:

[0022] Since the oil return port of the oil-gas separator provided by the utility model is provided with the heating device described in the above technical solution, the problem of ice blockage of the oil return port is solved, and normal operation is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the first embodiment of the oil-gas separator of the utility model;

[0024] Figure 2 yes Figure 1 Axonometric view of the central heating device;

[0025] Figure 3 yes Figure 2 A cross-sectional view of

[0026] Figure 4 It is a structural schematic diagram of another structure of the first embodiment of the oil-gas separator of the utility model;

[0027] Figure 5 This is a structural schematic diagram of another structure of the first embodiment of the oil-gas separator of the utility model;

[0028] Figure 6 This is a structural schematic diagram of the second embodiment of the oil-gas separator of the utility model;

[0029] Figure 7 This is a schematic structural diagram of another structure of the second embodiment of the oil-gas separator of the utility model;

[0030] Figure 8 This is a structural schematic diagram of another structure of the second embodiment of the oil-gas separator of the utility model;

[0031] In the figure: 100, heating device; 200, oil-gas separator; 1, heat conductor; 11, heat conducting section; 110, upper heat conducting section; 111, threaded connection; 112, lower heat conducting section; 113, guide limit groove; 114, support platform; 115, guide groove; 12, upper connecting section; 120, threaded inner hole; 13, lower connecting section; 14, oil return hole; 15, sealing chamber; 16, elastic rubber ball; 2, PTC heater; 21, heating shell; 22, locking piece; 23, wiring harness; 24, connector; 3, oil return port sealing ring; 4, heat conducting tube; 41, heat conducting tube opening; 5, heat conducting bucket; 51, connector; 52, heat conducting bucket body; 53, through hole; 54, connector opening; 6, sealing chamber sealing ring. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0033] Embodiment 1:

[0034] like Figures 1 to 3As shown, this embodiment provides an oil-gas separator 200 , and a heating device 100 is provided on the oil return port of the oil-gas separator 200 .

[0035] Among them, the heating device 100 includes a heat conductor 1 and a PTC heater 2 for heating the heat conductor 1, the heat conductor 1 includes a heat conducting section 11, an upper connecting section 12 arranged at the upper end of the heat conducting section 11 and a lower connecting section 13 arranged at the lower end of the heat conducting section 11, and the heat conductor 1 has an oil return hole 14 that penetrates the upper connecting section 12, the heat conducting section 11 and the lower connecting section 13 from top to bottom, the upper connecting section 12 is connected to the oil return port of the oil-gas separator 200, and the lower connecting section 13 is connected to the oil return pipe (not shown in the figure); the PTC heater 2 includes two heating shells 21, the two heating shells 21 are connected by a locking piece 22 and the two together form an installation cavity adapted to the heat conducting section 11, and the PTC heater 2 is fixedly sleeved on the heat conducting section 11 through the installation cavity.

[0036] The locking member 22 in this embodiment is preferably a matching bolt and nut assembly. In this embodiment, both heating shells 21 of the PTC heater 2 are embedded with PTC thermistors, and the connector 24 at the end of the wiring harness 23 of the PTC heater 2 is integrated with a temperature control switch for controlling the opening and closing of the PTC heater 2. The advantage of using the PTC heater 2 is that the PTC thermistor is a typical semiconductor resistor with temperature sensitivity. When exceeding a certain temperature, its resistance value increases stepwise with the increase of temperature, and the current decreases until it stagnates. Therefore, it has higher safety. When in use, the maximum heating temperature of the PTC heater 2 can be set according to the maximum allowable operating temperature of the oil-gas separator 200, which can not only meet the heating requirements but also ensure reliability.

[0037] During arrangement, the temperature control switch of the PTC heater 2 is arranged in an area of ​​the engine that is easy to detect the ambient temperature and has a stable temperature. The temperature control switch senses the ambient temperature. When the ambient temperature is lower than the preset temperature of the temperature control switch, the temperature control switch turns on the power of the PTC heater 2, and the PTC heater 2 continues to work. As the temperature rises, the heating power gradually decreases, so that the maximum heating temperature is controlled within the temperature range allowed by the oil-gas separator 200. Due to the action of the PTC heater 2, the oil-water mixture in the lower shell of the oil-gas separator 200 is continuously heated, thereby preventing the formation of ice to block the oil return port.

[0038] Of course, the temperature control switch may be eliminated, and the temperature data of the vehicle's whole vehicle ambient temperature sensor may be directly used to control the opening and closing of the PTC heater 2. The specific arrangement is made according to actual needs, and this embodiment does not impose any restrictions on this.

[0039] Since aluminum has good thermal conductivity and is light in weight, the heat conductor 1 in this embodiment is made of aluminum.

[0040] Since the threaded connection is a detachable fixed connection, it has the advantages of simple structure, reliable connection, easy assembly and disassembly, and certain sealing. Therefore, in this embodiment, a threaded structure for connecting to the oil return port of the oil-gas separator 200 is provided on the upper connecting section 12, and the upper connecting section 12 is threadedly connected to the oil return port of the oil-gas separator 200 through the threaded structure.

[0041] In order to ensure the sealing performance between the heating device 100 and the oil return port, an oil return port sealing structure for sealing the oil return port is further provided on the upper connecting section 12 in this embodiment.

[0042] Specifically, the oil return port sealing structure includes an oil return port sealing ring 3. An annular sealing groove is provided at one end of the upper connecting section 12 close to the heat conducting section 11. The oil return port sealing ring 3 is arranged in the sealing groove. When the upper connecting section 12 is threadedly connected to the oil return port, the oil return port sealing ring 3 is squeezed between the upper connecting section 12 and the inner wall of the oil return port to play a sealing role.

[0043] In order to further enhance the heating effect, in this embodiment, a thermal conductive joint is provided on the upper connecting section 12, one end of the thermal conductive joint is connected to the upper connecting section 12, and the other end of the thermal conductive joint is used to heat the interior of the oil-gas separator 200, and an oil return channel connecting the oil-gas separator 200 and the oil return hole 14 is provided on the thermal conductive joint.

[0044] Specifically, the thermal joint is arranged as follows: Figure 4 As shown, the upper connecting section 12 is provided with a threaded inner hole 120, the heat conducting joint is a heat conducting tube 4 with openings at both ends, one end of the heat conducting tube 4 is threadedly connected to the threaded inner hole 120 of the upper connecting section 12, and the other end of the heat conducting joint extends into the lower shell of the oil-gas separator 200, and a heat conducting tube opening 41 connected to its inner hole is provided on the side wall of the heat conducting tube 4, and the heat conducting tube opening 41 and the inner hole of the heat conducting tube 4 constitute an oil return channel. The provision of the heat conducting tube 4 can enhance the heating effect on the inside of the oil-gas separator and prevent the internal icing problem caused by condensation of water vapor at the upper end of the oil-gas separator 200.

[0045] Of course, the thermal joint can also be set as Figure 5 As shown, the upper connecting section 12 is provided with a threaded inner hole 120, the heat-conducting joint is a conical heat-conducting bucket 5, the heat-conducting bucket 5 includes a connector 51 and a heat-conducting bucket body 52 provided on the connector 51, the connector 51 is threadedly connected in the threaded inner hole 120 of the upper connecting section 12, and the heat-conducting bucket body 52 extends into the lower shell of the oil-gas separator 200; the connector 51 is provided with a through hole 53 penetrating the connector 51 and a connector opening 54 connected to the through hole 53, and the connector opening 54 and the through hole 53 constitute an oil return channel. The provision of the heat-conducting bucket 5 expands the heat-conducting area, enables the interior of the lower shell of the oil-gas separator 200 to be heated more evenly, and improves the heating effect.

[0046] To sum up, in this embodiment, the oil-gas separator 200 is provided with a heating device 100 at the oil return port, and the PTC heater 2 of the heating device 100 is powered on to generate heat to heat the heat conductor 1, and the heat conductor 1 continuously conducts the heat to the lower shell of the oil-gas separator 200, thereby achieving the purpose of preventing the oil-water mixture inside the oil-gas separator 200 from freezing. Therefore, compared with the prior art, this embodiment not only solves the problem of ice blockage of the oil return port of the oil-gas separator 200, and ensures the normal operation of the oil-gas separator 200, but also the heating device 100 can be directly installed on the existing oil return port of the oil-gas separator 200, without the need to modify the oil-gas separator 200, and is easy and quick to implement. At the same time, the use of the PTC heater 2 improves the safety during heating.

[0047] Embodiment 2:

[0048] This embodiment is basically the same as the first embodiment, and the only difference is that:

[0049] like Figure 6 As shown, in this embodiment, a non-return structure is provided in the heat transfer section 11 of the heating device 100, and the non-return structure is used to prevent the oil and gas in the oil return pipe from flowing back into the oil and gas separator 200. By providing the non-return structure, the function of the one-way valve is realized, and the problem of freezing of the one-way valve on the oil return pipe of the traditional crankcase ventilation system is solved.

[0050] Preferably, the heat-conducting section 11 includes an upper heat-conducting section 110 connected to the upper connecting section 12 and a lower heat-conducting section 112 connected to the lower connecting section 13. The upper heat-conducting section 110 and the lower heat-conducting section 112 are detachably connected and together form a sealed cavity 15. The non-return structure includes an elastic rubber ball 16 arranged in the sealed cavity 15. The elastic rubber ball 16 is used to open or block the oil return hole 14 in the upper heat-conducting section 110.

[0051] Specifically, the upper heat conducting section 110 is protrudingly provided with a threaded connection portion 111, and the lower heat conducting section 112 has a threaded hole. The threaded connection portion 111 is threadedly connected to the threaded hole and the two together form a sealed cavity 15; a guide limit groove 113 is provided on the threaded connection portion 111, and a support platform 114 is protrudingly provided at the bottom of the threaded hole. The oil return hole 14 passes through the guide limit groove 113 and the support platform 114, and a guide groove 115 connecting the sealed cavity 15 and the oil return hole 14 is provided on the support platform 114, and the elastic rubber ball 16 is located between the guide limit groove 113 and the support platform 114.

[0052] In order to improve the sealing performance of the sealing cavity 15 , in this embodiment, a sealing cavity sealing structure for sealing the sealing cavity 15 is provided between the threaded connection portion 111 and the wall of the threaded hole of the lower heat conducting section 112 .

[0053] Specifically, grooves are respectively arranged on the wall of the threaded hole of the threaded connection portion 111 and the lower heat conducting section 112 , and the two grooves together form a sealing groove, and the sealing cavity sealing structure includes a sealing cavity sealing ring 6 arranged in the sealing groove.

[0054] To further enhance the heating effect, Figure 7 and Figure 8 As shown, in this embodiment, a heat conducting joint is provided on the upper connecting section 12, one end of the heat conducting joint is threadedly connected to the upper connecting section 12, and the other end of the heat conducting joint is used to heat the inside of the oil-gas separator 200, and an oil return channel connecting the oil-gas separator 200 and the oil return hole 14 is provided on the heat conducting joint. Figure 7 Thermal Conductive Joints and Figure 4 The thermal joints in the same Figure 8 Thermal Conductive Joints and Figure 5 The thermal conductive joints are the same as those in FIG. 1 , so they will not be described in detail here.

[0055] Generally, the elastic rubber ball 16 is blocked at the oil return hole 14 of the upper heat conducting section 110 under the pressure of the support platform 114. When the oil-water mixture separated by the oil-gas separator 200 flows from the upper heat conducting section 110 to the lower heat conducting section 112 due to gravity and overcomes the elastic force of the elastic rubber ball 16 to flow into the sealing chamber 15, the oil-water mixture flows smoothly into the lower heat conducting section 112 and finally flows into the oil pan through the oil return pipe. When the crankcase blowby gas and engine oil in the oil pan want to flow upward from the lower heat conducting section 112 to the upper heat conducting section 110, the elastic rubber ball 16 is restricted to form a flow interception blockage at the oil return hole 14 of the upper heat conducting section 110, so it can effectively prevent the crankcase blowby gas and engine oil in the oil pan from flowing upward.

[0056] The above are some embodiments of the oil-gas separator and the heating device thereof of the utility model. There are more embodiments which will not be described in detail here. The utility model is not limited to the above specific implementation methods. Various changes made by ordinary technicians in this field based on the above concepts without creative labor all fall within the protection scope of the utility model.

Claims

1. A heating device, characterized in that: The invention comprises a heat conductor and a PTC heater for heating the heat conductor. The heat conductor includes a heat conducting section, an upper connecting section arranged at the upper end of the heat conducting section and a lower connecting section arranged at the lower end of the heat conducting section, and the heat conductor has an oil return hole that penetrates the upper connecting section, the heat conducting section and the lower connecting section from top to bottom, the upper connecting section is used to be connected to the oil return port of the oil-gas separator, and the lower connecting section is used to be connected to the oil return pipe; the PTC heater includes two heating shells, the two heating shells are connected by a locking piece and the two together form an installation cavity adapted to the heat conducting section, and the PTC heater is fixedly sleeved on the heat conducting section through the installation cavity.

2. The heating device according to claim 1, characterized in that A non-return structure is arranged in the heat conduction section, and the non-return structure is used to prevent the oil and gas in the oil return pipe from flowing back into the oil and gas separator.

3. The heating device according to claim 2, characterized in that: The heat-conducting section comprises an upper heat-conducting section connected to the upper connecting section and a lower heat-conducting section connected to the lower connecting section. The upper heat-conducting section and the lower heat-conducting section are detachably connected and together form a sealed cavity. The non-return structure comprises an elastic rubber ball arranged in the sealed cavity. The elastic rubber ball is used to open or block the oil return hole in the upper heat-conducting section.

4. The heating device according to claim 3, characterized in that: The upper heat conducting section is protrudingly provided with a threaded connection portion, and the lower heat conducting section has a threaded hole. The threaded connection portion is threadedly connected to the threaded hole and the two together enclose the sealing cavity; a guide limit groove is provided on the threaded connection portion, and a support platform is protrudingly provided at the bottom of the threaded hole. The oil return hole passes through the guide limit groove and the support platform, and a guide groove connecting the sealing cavity and the oil return hole is provided on the support platform, and the elastic rubber ball is located between the guide limit groove and the support platform.

5. The heating device according to claim 4, characterized in that: A sealing cavity sealing structure for sealing the sealing cavity is arranged between the threaded connection portion and the hole wall of the threaded hole.

6. The heating device according to claim 1, characterized in that: The upper connecting section is provided with a threaded structure for connecting with the oil return port and an oil return port sealing structure for sealing the oil return port.

7. The heating device according to claim 1, characterized in that: The upper connecting section is provided with a heat-conducting joint, one end of which is connected to the upper connecting section, and the other end of which is used to heat the interior of the oil-gas separator. The heat-conducting joint is provided with an oil return channel for connecting the oil-gas separator and the oil return hole.

8. The heating device according to claim 7, characterized in that: The heat-conducting joint is a heat-conducting tube with openings at both ends, one end of the heat-conducting tube is threadedly connected to the upper connecting section, and the other end of the heat-conducting joint is used to extend into the lower shell of the oil-gas separator; a heat-conducting tube opening connected to its inner hole is opened on the side wall of the heat-conducting tube, and the heat-conducting tube opening and the inner hole of the heat-conducting tube constitute the oil return channel.

9. The heating device according to claim 7, characterized in that: The heat-conducting joint is a conical heat-conducting bucket, which includes a connecting head and a heat-conducting bucket body arranged on the connecting head, the connecting head is threadedly connected to the upper connecting section, and the heat-conducting bucket body is used to extend into the lower shell of the oil-gas separator; a through hole penetrating the connecting head and a connecting head opening connected to the through hole are provided on the connecting head, and the connecting head opening and the through hole constitute the oil return channel.

10. An oil-gas separator, characterized in that: The oil return port of the oil-gas separator is provided with a heating device according to any one of claims 1 to 9.

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