Engine oil preheating device of generator set
By using coolant preheating pipes and heaters in the generator set, the problem of starting difficulties caused by increased oil viscosity in cold environments was solved, achieving the effects of rapid starting and stable cooling system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU CANGNAN PUBLIC UTILITY DEV CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-05-05
AI Technical Summary
In cold environments, the viscosity of the generator set's engine oil increases, making it difficult for the oil pump to draw and deliver oil, which in turn makes it difficult to start the engine.
Using coolant as a heat carrier, heat is transferred to the engine through coolant preheating pipes and heaters, reducing engine oil viscosity. The coolant flow control mechanism quickly switches between normal mode and preheating mode to ensure stable operation of the cooling system after engine start-up.
It enables rapid engine start-up in cold environments, ensures uniform and efficient oil preheating, avoids poor circulation caused by heating in one place, and maintains the stability of the engine cooling system.
Smart Images
Figure CN224200714U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of generator sets, specifically to an oil preheating device for generator sets. Background Technology
[0002] A generator set is a device that converts chemical energy (from fuels such as diesel, gasoline, and natural gas) or other forms of energy (such as wind and hydropower, but usually refers to those driven by an internal combustion engine) into electrical energy. It typically consists of components such as an engine, generator, control system, cooling system, and lubrication system. The cooling system uses coolant to maintain the engine's internal operating temperature within a safe and efficient range, while the lubrication system continuously delivers clean, pressure-stable, and appropriately temperature-controlled engine oil to the various moving friction pairs (contacting surfaces) within the engine.
[0003] If the generator set is in a cold working environment, the viscosity of the engine oil will increase sharply as the temperature of the working environment decreases. When the engine needs to be started, the high viscosity of the engine oil will make it difficult for the oil pump to draw and pump oil, which will cause a sharp increase in the internal resistance of the engine, ultimately resulting in an excessive burden on the starter motor and difficulty in starting the engine. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an oil preheating device for generator sets that can quickly start the engine in cold environments.
[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a coolant outlet pipe, which connects the outlet of the coolant tank to the cooling pipes inside the engine. It also includes a coolant preheating pipe, a heater, a preheating water pump, and a coolant flow direction control mechanism. The coolant outlet pipe sequentially includes a front section, a switching section, and a rear section along the coolant flow direction. The front and rear ends of the coolant preheating pipe are respectively connected to the front and rear sections and are connected in parallel with the switching section. The heater and preheating water pump are located within the coolant preheating pipe. When the heater and preheating water pump are started, the coolant flow direction control mechanism controls the coolant to flow from the front section through the coolant preheating pipe to the rear section. When the heater and preheating water pump are stopped, the coolant flow direction control mechanism controls the coolant to flow from the front section through the switching section to the rear section.
[0006] By adopting the above technical solution, when the ambient temperature is too low, the coolant flow control mechanism controls the coolant to flow from the front section through the coolant preheating pipe to the rear section, while the heater and preheating water pump are started. After being heated by the heater, the coolant is transferred by the preheating water pump to the cooling pipe connection inside the engine. The heat carried by the coolant heats the internal environment of the engine, and then conducts it to the engine oil, thereby reducing the viscosity of the engine oil and making the engine easier to start. After the engine starts, the coolant flow control mechanism controls the coolant to flow from the front section through the switching section to the rear section, while the heater and preheating water pump are stopped. The coolant then does not flow through the coolant preheating pipe and provides normal cooling function for the engine. The above structure has the following advantages: ① It selects coolant as the heat carrier and makes reasonable use of the existing cooling pipes inside the engine to evenly transfer the heat carried by the coolant to all parts of the engine, so that the oil in all parts is preheated, ensuring the preheating effect and efficiency, and avoiding the situation where the oil is not flowing smoothly even when heated in a single place; ② It adds a coolant flow control mechanism, which can not only quickly switch the coolant outlet pipe between normal mode and preheating mode, but also does not change the existing cooling path of the cooling system, ensuring the stable operation of the cooling system after the engine starts.
[0007] The present invention is further configured such that: the coolant flow direction control mechanism includes a switching valve, a first check valve and a second check valve; the front end, the front end of the switching section and the front end of the coolant preheating pipe converge at one point and serve as the first convergence point; the switching valve is located at the first convergence point and controls the switching connection between the front end and the switching section or the coolant preheating pipe; the first check valve is located in the switching section and near the rear end; and the second check valve is located in the coolant preheating pipe and near the rear end.
[0008] By adopting the above technical solution, the coolant flow direction can be changed simply by operating the switching valve, which is easy to operate. In addition, the first check valve and the second check valve prevent the coolant from flowing back to the other parallel pipe, ensuring the accurate flow of coolant.
[0009] The present invention is further configured to include a module bracket, wherein a lifting platform is provided above the module bracket, and the heater and the preheating water pump are fixed to the lifting platform.
[0010] By adopting the above technical solution, the heater and preheating water pump are fixed to the module bracket to form a preheating module, which facilitates assembly and transportation. In addition, the height of the heater and preheating water pump is raised by the lifting platform, so that the connection positions of the preheating module are all in an easily accessible position, improving the convenience and efficiency of docking.
[0011] The present invention is further configured such that: the coolant preheating pipeline includes, in sequence along the coolant flow direction, a first flexible hose section, a second flexible hose section, a third flexible hose section, and a rigid pipe section; the first flexible hose section is connected between the switching valve and the inlet of the heater; the second flexible hose section is connected between the outlet of the heater and the inlet of the preheating water pump; the third flexible hose section is connected between the outlet of the preheating water pump and the second check valve; the front end of the rear section, the rear end of the switching section, and the rear end of the coolant preheating pipeline converge at one point as a second convergence point; a tee joint is provided at the second convergence point; and the rigid pipe section is connected between the tee joint and the second check valve.
[0012] By adopting the above technical solution, and selecting a hose of appropriate length to connect the switching valve to the heater and the preheating pump to the second check valve, the preheating module formed by the heater and preheating pump can be quickly and accurately connected to the generator set, avoiding the inconvenience caused by using rigid pipes of specific shapes that can only be connected in specific positions. Using rigid pipes to connect the tee fitting and the second check valve ensures that the second check valve is stably installed on the tee fitting of the generator set. Furthermore, the preheating module is an optional module, only assembled in cold working environments, reducing the cost of use in normal temperature environments while providing a solution for cold working environments. Even without connecting the preheating module, the switching valve and the second check valve will prevent coolant leakage from the preheating module installation point, ensuring practicality.
[0013] The present invention is further configured such that: the module bracket is provided with legs on both sides below the lifting platform, and each leg has a fixed bend at the lower end that is attached to and fixed to the ground; two longitudinally arranged reinforcing strips are provided between the legs on both sides; and reinforcing ribs are provided at the corners formed by the legs, reinforcing strips and lifting platform.
[0014] By adopting the above technical solution, a fixed bend that is attached to and fixed to the ground is added to the lower end of the support foot to ensure the fixed reliability of the module bracket. The corner formed by the support foot, the reinforcing strip and the lifting platform can be strengthened by reinforcing ribs to ensure the support strength of the module bracket, thereby providing a stable working environment for the heater and preheating water pump. Attached Figure Description
[0015] Figure 1 This is a top perspective view of a specific embodiment of the present utility model;
[0016] Figure 2 This is a bottom-view perspective view of a specific embodiment of the present invention. Detailed Implementation
[0017] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0019] like Figure 1 — Figure 2As shown in the figure, this utility model discloses an oil preheating device for a generator set. The arrows in the figure represent the coolant flow direction. The device includes a coolant outlet pipe 1 (cooling system component), which connects the outlet of the coolant tank to the cooling pipes inside the engine. It also includes a coolant preheating pipe 2, a heater 3, a preheating water pump 4, and a coolant flow direction control mechanism. The coolant outlet pipe 1, along the coolant flow direction, includes a front section 11, a switching section 12, and a rear section 13. The front and rear ends of the coolant preheating pipe 2 are connected to the front section 11 and the rear section 13, respectively, and are connected in parallel with the switching section 12. The heater 3 and the preheating water pump 4 are located within the coolant preheating pipe 2. When the heater 3 and the preheating water pump 4 are started, the coolant flow direction control mechanism controls the coolant to flow from the front section 11 through the coolant preheating pipe 2 to the rear section 13. When heater 3 and preheating water pump 4 stop, the coolant flow control mechanism controls the coolant to flow from the front section 11 through the switching section 12 to the rear section 13. When the ambient temperature is too low, the coolant flow control mechanism controls the coolant to flow from the front section 11 through the coolant preheating pipe 2 to the rear section 13, while heater 3 and preheating water pump 4 start. After being heated by heater 3, the coolant is transferred by preheating water pump 4 to the cooling pipe connection inside the engine. The heat carried by the coolant heats the internal environment of the engine, which is then conducted to the engine oil, thereby reducing the viscosity of the engine oil and making the engine easier to start. After the engine starts, the coolant flow control mechanism controls the coolant to flow from the front section 11 through the switching section 12 to the rear section 13, while heater 3 and preheating water pump 4 stop. The coolant then does not flow through the coolant preheating pipe 2 and normally provides cooling for the engine. The above structure has the following advantages: ① It selects coolant as the heat carrier and makes reasonable use of the existing cooling pipes inside the engine to evenly transfer the heat carried by the coolant to all parts of the engine, so that the oil in all parts is preheated, ensuring the preheating effect and efficiency, and avoiding the situation where the oil is not flowing smoothly even when heated in a single place; ② It adds a coolant flow control mechanism, which can not only quickly switch the coolant outlet pipe 1 between normal mode and preheating mode, but also does not change the existing cooling path of the cooling system, ensuring the stable operation of the cooling system after the engine starts.
[0020] The coolant flow control mechanism includes a switching valve 14, a first check valve 15, and a second check valve 21. The switching valve 14 can be manually switched on or off or equipped with a control circuit and an actuator. In this embodiment, a control circuit is used to coordinate the actuator, heater 3, and preheating water pump 4 for more convenient control. The rear end of the front section 11, the front end of the switching section 12, and the front end of the coolant preheating pipe 2 converge at one point as the first convergence point a. The switching valve 14 is located at the first convergence point a and controls the switching connection between the front section 11 and the switching section 12 or the coolant preheating pipe 2. The first check valve 15 is located in the switching section 12 and near the rear section 13. The second check valve 21 is located in the coolant preheating pipe 2 and near the rear section 13. The coolant flow direction can be changed simply by operating the switching valve 14. The operation is simple and, together with the first check valve 15 and the second check valve 21, it prevents the coolant from flowing back to the other parallel pipe, ensuring accurate coolant flow.
[0021] It also includes a module bracket 5, with a lifting platform 51 on top of the module bracket 5. The heater 3 and the preheating water pump 4 are fixed to the lifting platform 51. The heater 3 and the preheating water pump 4 are fixed to the module bracket 5 to form a preheating module, which is convenient for assembly and transportation. In addition, the lifting platform 51 raises the heater 3 and the preheating water pump 4 to a height so that the connection positions of the preheating module are in an easily accessible position, improving the convenience and efficiency of docking.
[0022] The coolant preheating pipe 2, along the coolant flow direction, includes a first flexible hose section 22, a second flexible hose section 23, a third flexible hose section 24, and a rigid pipe section 25. The first flexible hose section 22 connects to the inlet of the switching valve 14 and the heater 3. The second flexible hose section 23 connects to the outlet of the heater 3 and the inlet of the preheating water pump 4. The third flexible hose section 24 connects to the outlet of the preheating water pump 4 and the second check valve 21. The front end of the rear section 13, the rear end of the switching section 12, and the rear end of the coolant preheating pipe 2 converge at a point b, forming a second junction. A tee connector 16 is provided at the second junction b. The rigid pipe section 25 connects to the tee connector 16 and the second check valve 21. A hose of appropriate length is selected to connect the switching valve 14 and the heater 3. The preheating pump 4 and the second check valve 21 enable the preheating module, formed by combining the heater 3 and the preheating pump 4, to be quickly and accurately connected to the generator set, avoiding the inconvenience of using rigid pipes of a specific shape to be installed in a specific position for connection. The selection of rigid pipe connection tee joint 16 and second check valve 21 ensures that the second check valve 21 is stably installed on the tee joint 16 of the generator set. In addition, the preheating module is an optional module and is only assembled in cold working environments, reducing the cost of use in normal temperature working environments while reserving a solution for cold working environments. Even if the preheating module is not connected, the switching valve 14 and the second check valve 21 will limit the coolant from leaking from the preheating module installation point, ensuring practicality.
[0023] The module support 5 is located below the lifting platform 51 and has vertically arranged support legs 52 on both sides of the horizontal direction. Each support leg 52 has a fixed bend 53 at its lower end that is flush with the ground and fixed to the ground. The fixed bend 53 is generally fixed to the ground with expansion screws. There are two longitudinally arranged reinforcing strips 54 arranged horizontally between the support legs 52. Reinforcing ribs 55 are provided at the corners formed by the support legs 52, reinforcing strips 54 and lifting platform 51. The fixed bends 53 at the lower end of the support legs 52 that are flush with the ground and fixed to the ground are added to ensure the fixed reliability of the module support 5. The reinforcing ribs 55 can also strengthen the corners formed by the support legs 52, reinforcing strips 54 and lifting platform 51, ensuring the support strength of the module support 5, thereby providing a stable working environment for the heater 3 and the preheating water pump 4.
Claims
1. An oil preheating device for a generator set, comprising a coolant outlet pipe, wherein the coolant outlet pipe connects the outlet end of the coolant tank to the cooling pipes inside the engine, characterized in that: It also includes a coolant preheating pipe, a heater, a preheating water pump, and a coolant flow direction control mechanism. The coolant outlet pipe includes a front section, a switching section, and a rear section in sequence along the coolant flow direction. The front and rear ends of the coolant preheating pipe are respectively connected to the front and rear sections and are connected in parallel with the switching section. The heater and the preheating water pump are installed in the coolant preheating pipe. When the heater and the preheating water pump are started, the coolant flow direction control mechanism controls the coolant to flow from the front section through the coolant preheating pipe to the rear section. When the heater and the preheating water pump are stopped, the coolant flow direction control mechanism controls the coolant to flow from the front section through the switching section to the rear section.
2. The generator set oil preheating device according to claim 1, characterized in that: The coolant flow control mechanism includes a switching valve, a first check valve, and a second check valve. The front end, the front end of the switching section, and the front end of the coolant preheating pipe converge at one point as the first convergence point. The switching valve is located at the first convergence point and controls the switching connection between the front end and the switching section or the coolant preheating pipe. The first check valve is located in the switching section and near the rear end. The second check valve is located in the coolant preheating pipe and near the rear end.
3. The generator set oil preheating device according to claim 2, characterized in that: It also includes a module support, on which a lifting platform is provided, and the heater and preheating water pump are fixed to the lifting platform.
4. The generator set oil preheating device according to claim 3, characterized in that: The coolant preheating pipeline includes, in sequence along the coolant flow direction, a first flexible hose section, a second flexible hose section, a third flexible hose section, and a rigid pipe section. The first flexible hose section is connected between the switching valve and the inlet of the heater. The second flexible hose section is connected between the outlet of the heater and the inlet of the preheating water pump. The third flexible hose section is connected between the outlet of the preheating water pump and the second check valve. The front end of the rear section, the rear end of the switching section, and the rear end of the coolant preheating pipeline converge at one point as a second junction. A tee joint is provided at the second junction. The rigid pipe section is connected between the tee joint and the second check valve.
5. The generator set oil preheating device according to claim 4, characterized in that: The module support is provided with vertical legs on both sides of the horizontal side below the lifting platform. The lower end of each leg is provided with a fixed bend that is attached to and fixed to the ground. There are two longitudinally arranged reinforcing strips between the legs on both sides. Reinforcing ribs are provided at the corners formed by the legs, reinforcing strips and lifting platform.