Double-rotor oil pump

Abstract

The utility model relates to the technical field of oil pumps, in particular to a double-rotor oil pump which comprises a pump body and a pump cover, the pump body is in threaded connection with the pump cover through bolts, a main pump oil suction port, a main pump oil discharge port, an auxiliary pump oil suction port and an auxiliary pump oil discharge port are installed on the outer wall of the pump cover, and an assembling mechanism is connected to the inner wall of the pump cover. According to the double-rotor oil pump, the first mounting base and the second mounting base are adopted for overall dismounting and mounting of the rotor modules, so that the maintenance and replacement processes are greatly simplified, and the maintenance time cost and the operation complexity are remarkably reduced; the introduction of the assembling mechanism enables the main pump rotor and the auxiliary pump rotor to be operated as an integral unit, and parts do not need to be disassembled one by one, so that the working efficiency is improved, the possibility of human errors is reduced, the rotors are disassembled together for maintenance or replacement, and the working efficiency is improved. And the maintenance complexity and the time cost are reduced to a certain extent.

Description

Technical Field

[0001] This utility model relates to the technical field of oil pumps, specifically a dual-rotor oil pump. Background Technology

[0002] As the lubricating oil supply component of the engine, the oil pump plays an indispensable role in the continuous and reliable operation of the engine.

[0003] For example, a dual-rotor oil pump with authorization announcement number "CN207230127U" solves the problem of dry friction in the engine caused by the inability of the existing dual-rotor oil pump to properly draw lubricating oil from the oil pan. It also addresses the issue of the oil pump being unable to pump oil from the oil pan when the engine is tilted significantly, greatly improving the application range and reliability of the engine. At the same time, the dual-rotor design of this oil pump does not result in high power consumption. Considering the errors in the use of existing dual-rotor oil pumps, it is difficult to install the pump rotor directly onto the pump cover during installation, making it impossible to remove the rotor for maintenance or replacement, which to some extent increases the complexity and time cost of maintenance. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that existing dual-rotor oil pumps cannot have their rotors removed together for maintenance or replacement, which increases the complexity and time cost of maintenance to a certain extent. Therefore, this invention proposes a dual-rotor oil pump.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dual-rotor oil pump, comprising a pump body and a pump cover, wherein the pump body is threadedly connected to the pump cover by bolts, and the outer wall of the pump cover is provided with a main pump oil inlet, a main pump oil outlet, an auxiliary pump oil inlet, and an auxiliary pump oil outlet, and the inner wall of the pump cover is connected to an assembly mechanism.

[0006] In practical applications, this feature allows the dual-rotor oil pump to effectively improve oil circulation efficiency through the coordinated operation of the main and auxiliary pumps. The main and auxiliary pumps draw oil from different locations in the oil pan and deliver it to the engine's main oil passages and auxiliary oil circuits, ensuring the stable operation of the lubrication system.

[0007] Preferably, the assembly mechanism includes a first mounting base, which is threadedly connected to the pump cover by bolts. A main pump rotor is mounted on the inner wall of the first mounting base, and a flat groove is machined at the end of the main pump rotor.

[0008] In practical applications, the flat slot design effectively enhances the connection stability between the main pump rotor and the drive components, while facilitating installation and disassembly. In addition, the outer wall of the first mounting base fits tightly against the pump body, ensuring the sealing and strength of the overall structure and preventing performance degradation due to oil leakage or pressure loss.

[0009] Preferably, the outer wall of the first mounting base is in contact with the pump body, and the outer wall of the pump body is connected to a pressure relief mechanism.

[0010] In practical applications, when the system pressure exceeds the set value, the pressure relief mechanism, through the cooperation of the connector and the threaded block, causes the plunger to shift, thereby opening the pressure relief channel and releasing the excess pressure to ensure the safety and stability of the equipment operation.

[0011] Preferably, the pressure relief mechanism includes a connector, the outer wall of which is connected to the pump body, the inner wall of which is threadedly connected to a threaded block, and the inner wall of the threaded block abutting against the plunger.

[0012] In practical applications, this feature, along with the design of the pressure relief mechanism, can effectively prevent equipment damage caused by excessive pressure.

[0013] Preferably, the main pump suction port is connected to the oil pipe on the left side of the bottom of the oil pan, the main pump discharge port is connected to the main oil passage of the engine, the auxiliary pump suction port is connected to the oil pipe on the right side of the bottom of the engine oil pan, and the auxiliary pump discharge port is connected to the oil pan on one side of the main pump.

[0014] In practical applications, this design ensures that the main pump's suction port and the auxiliary pump's suction port draw oil from different locations in the oil pan, guaranteeing even oil distribution and efficient circulation. The main pump's discharge port delivers oil to the engine's main oil passages, providing lubrication for critical components, while the auxiliary pump's discharge port guides the oil to the oil pan on the main pump side, forming an auxiliary oil path to further optimize lubrication. This design not only improves oil utilization efficiency but also effectively reduces the risk of wear during engine operation, extending the equipment's lifespan.

[0015] Preferably, both the rotor shaft of the main pump rotor and the rotor shaft of the auxiliary pump rotor are driven by a drive gear on the engine crankshaft.

[0016] In practical applications, this feature ensures that the drive gear on the engine crankshaft transmits power to the rotor shafts of the main pump rotor and the auxiliary pump rotor through precise meshing, thus ensuring the synchronicity of rotor operation.

[0017] Preferably, the inner wall of the pump body is fitted with the second mounting seat, the inner wall of the second mounting seat is rotatably connected to the auxiliary pump rotor, and the second mounting seat is threadedly connected to the pump cover by bolts.

[0018] In practical applications, this feature ensures that the close fit between the second mounting base and the pump body further enhances the stability of the overall structure, while also providing precise positioning and support for the auxiliary pump rotor.

[0019] The present invention proposes a dual-rotor oil pump, which has the following advantages: by using a first mounting base and a second mounting base for the overall disassembly and installation of the rotor module, the maintenance and replacement process is greatly simplified, and the time cost and operational complexity of maintenance are significantly reduced. The introduction of the assembly mechanism allows the main pump rotor and the auxiliary pump rotor to be operated as a whole unit without disassembling the parts one by one, thereby improving work efficiency and reducing the possibility of human error. It enables the rotors to be removed together for maintenance or replacement, which reduces the complexity and time cost of maintenance to a certain extent. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the pump body and pump cover;

[0022] Figure 3 for Figure 1 Schematic diagram of the pump body structure;

[0023] Figure 4 for Figure 2 Schematic diagram of the assembly mechanism;

[0024] Figure 5 for Figure 1 Schematic diagram of the intermediate auxiliary pump rotor and the second mounting base;

[0025] Figure 6 for Figure 1 Schematic diagram of the pump cover structure.

[0026] In the diagram: 1. Pump body, 2. Pump cover, 3. Main pump suction port, 4. Main pump discharge port, 5. Auxiliary pump suction port, 6. Auxiliary pump discharge port, 7. Assembly mechanism, 701. First mounting base, 702. Main pump rotor, 703. Flat groove, 8. Pressure relief mechanism, 801. Connector, 802. Threaded block, 803. Plunger, 9. Auxiliary pump rotor, 10. Second mounting base. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] Please see Figure 1-6 In this embodiment, a dual-rotor oil pump includes a pump body 1 and a pump cover 2. The pump body 1 is threadedly connected to the pump cover 2 by bolts. The outer wall of the pump cover 2 is equipped with a main pump oil inlet 3, a main pump oil outlet 4, an auxiliary pump oil inlet 5, and an auxiliary pump oil outlet 6. An assembly mechanism 7 is connected to the inner wall of the pump cover 2.

[0029] The assembly mechanism 7 includes a first mounting base 701, which is threadedly connected to the pump cover 2 by bolts. The main pump rotor 702 is mounted on the inner wall of the first mounting base 701, and the end of the main pump rotor 702 is machined with a flat groove 703.

[0030] The dual-rotor oil pump uses a first mounting base 701 and a second mounting base for the overall disassembly and installation of the rotor module, which greatly simplifies the maintenance and replacement process, significantly reduces the time cost and operational complexity of maintenance. The introduction of the assembly mechanism 7 allows the main pump rotor 702 and the auxiliary pump rotor 9 to be operated as a whole unit without disassembling the parts one by one, thereby improving work efficiency and reducing the possibility of human error. It enables the rotors to be removed together for maintenance or replacement, which reduces the complexity and time cost of maintenance to a certain extent.

[0031] The outer wall of the first mounting base 701 is in contact with the pump body 1. The outer wall of the pump body 1 is connected to a pressure relief mechanism 8. The pressure relief mechanism 8 includes a connector 801. The outer wall of the connector 801 is connected to the pump body 1. The inner wall of the connector 801 is threadedly connected to a threaded block 802. The inner wall of the threaded block 802 is pressed against a plunger 803.

[0032] The main pump suction port 3 is connected to the oil pipe on the left side of the bottom of the oil pan, the main pump discharge port 4 is connected to the main oil passage of the engine, the auxiliary pump suction port 5 is connected to the oil pipe on the right side of the bottom of the engine oil pan, and the auxiliary pump discharge port 6 is connected to the oil pan on one side of the main pump.

[0033] Both the rotor shaft of the main pump rotor 702 and the rotor shaft of the auxiliary pump rotor 9 are driven by the drive gear on the engine crankshaft. The inner wall of the pump body 1 is in contact with the second mounting seat 10. The inner wall of the second mounting seat 10 is rotatably connected to the auxiliary pump rotor 9. The second mounting seat 10 is threadedly connected to the pump cover 2 by bolts.

[0034] Working principle:

[0035] When the engine starts, the drive gear on the crankshaft begins to rotate, transmitting power to the rotor shafts of the main pump rotor 702 and the auxiliary pump rotor 9 through precise meshing transmission. The main pump rotor 702 is installed in the first mounting seat 701, while the auxiliary pump rotor 9 is located in the second mounting seat 10. The two operate at high speed in their respective mounting seats, ensuring that the main pump and the auxiliary pump can work independently and collaboratively, thereby achieving efficient oil suction and discharge functions.

[0036] The main pump suction port 4 connects to the oil pipe on the left side of the bottom of the oil pan. After drawing in engine oil from this location, the main pump rotor 702 pressurizes the engine oil and delivers the pressurized engine oil to the main oil passage of the engine through the main pump discharge port 4. This process provides sufficient lubrication for the key components in the main oil passage, effectively reducing the risk of friction and wear. At the same time, the auxiliary pump suction port 9 draws in engine oil from the right side of the bottom of the oil pan. After being pressurized by the auxiliary pump rotor, the engine oil is guided to the oil pan on the side of the main pump through the auxiliary pump discharge port, forming an auxiliary oil circuit. This dual-circuit design not only improves the circulation efficiency of the engine oil but also optimizes the uniformity of the engine oil distribution, further enhancing the lubrication effect.

[0037] Throughout operation, the first mounting base 701 and the second mounting base 10 are tightly connected to the pump cover by bolts and fit snugly against the inner wall of the pump body 1, ensuring the sealing and strength of the overall structure. The flat groove 703 makes the connection between the main pump rotor 702 and the drive components more stable, while also facilitating disassembly and maintenance. Furthermore, the pressure relief mechanism 8 ensures system safety. When the system pressure exceeds the set value, the threaded block 802 inside the connector 801 is displaced by the compression of the plunger 803, thereby opening the pressure relief channel and releasing excess pressure. This mechanism effectively prevents equipment damage or performance degradation due to excessive pressure. After pressure relief, the plunger 803 is restored to its original state.

[0038] In summary, this dual-rotor oil pump achieves efficient and stable oil circulation through the coordinated work of the main and auxiliary pumps, a reasonable oil suction and discharge layout, and the protection of the pressure relief mechanism 8. Its compact structure not only enhances the overall stability of the equipment but also facilitates installation and maintenance, significantly extending the service life of the equipment and providing reliable support for the smooth operation of the engine.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double rotor oil pump comprising a pump body (1) and a pump cover (2), the pump body (1) is threadedly connected with the pump cover (2) by bolts, characterized in that: The outer wall of the pump cover (2) is equipped with a main pump suction port (3), a main pump discharge port (4), an auxiliary pump suction port (5) and an auxiliary pump discharge port (6), and the inner wall of the pump cover (2) is connected to an assembly mechanism (7).

2. The two-rotor oil pump according to claim 1, characterized in that: The assembly mechanism (7) includes a first mounting base (701), which is threadedly connected to the pump cover (2) by bolts. The main pump rotor (702) is mounted on the inner wall of the first mounting base (701), and the end of the main pump rotor (702) is machined with a flat groove (703).

3. The two-rotor oil pump according to claim 2, characterized in that: The outer wall of the first mounting base (701) is in contact with the pump body (1), and the outer wall of the pump body (1) is connected to a pressure relief mechanism (8).

4. The two-rotor oil pump according to claim 3, characterized in that: The pressure relief mechanism (8) includes a connector (801), the outer wall of which is connected to the pump body (1), the inner wall of which is threadedly connected to a threaded block (802), and the inner wall of the threaded block (802) abutting against a plunger (803).

5. The two-rotor oil pump of claim 1, wherein: The main pump suction port (3) is connected to the oil pipe on the left side of the bottom of the oil pan, the main pump discharge port (4) is connected to the main oil passage of the engine, the auxiliary pump suction port (5) is connected to the oil pipe on the right side of the bottom of the engine oil pan, and the auxiliary pump discharge port (6) is connected to the oil pan on one side of the main pump.

6. The two-rotor oil pump of claim 2, wherein: The rotor shafts of the main pump rotor (702) and the auxiliary pump rotor (9) are both driven by the drive gear on the engine crankshaft.

7. The two-rotor oil pump of claim 1, wherein: The inner wall of the pump body (1) is in contact with the second mounting seat (10), the inner wall of the second mounting seat (10) is rotatably connected to the auxiliary pump rotor (9), and the second mounting seat (10) is threadedly connected to the pump cover (2) by bolts.

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