Oil pump with shaft stop bearing arrangement

Abstract

The utility model belongs to compressor oil pump technical field, concretely is an oil pump with shaft bearing structure, including pump body, inner rotor and outer rotor, the pump body includes oil inlet and oil outlet, the outer rotor rotates and is inserted in the inside of pump body, the inner rotor engages and links in the inside of outer rotor, the side of pump body close to the one side of oil outlet is embedded with the sealing piece and the thrust bearing, the edge of thrust bearing is equipped with a plurality of riveting pressure points, the inner wall of pump body is equipped with a plurality of riveting grooves corresponding with riveting pressure point, the setting of stiffener can promote the strength of pump body, the setting of fastening block can conveniently install and fix pump body, and the setting of positioning boss can conveniently position and fix pump body. The utility model can effectively limit rotor axial displacement through the setting of thrust bearing, thereby effectively improving the use effect of oil pump.

Description

Technical Field

[0001] This utility model relates to the field of compressor oil pump technology, and in particular to an oil pump with a non-shaft bearing structure. Background Technology

[0002] For variable frequency scroll compressors, when the frequency and speed change, different and appropriate oil quantities are required for each lubrication part of the compressor to ensure normal operation under various working conditions. The function of the oil pump is to provide the appropriate oil quantity according to the actual operating frequency and speed.

[0003] Currently, there are two types of oil supply methods for variable frequency compressor circuits: one is the high-pressure chamber type, which does not use an oil pump. This type places the motor and oil sump in a high-pressure, high-temperature chamber, relying on pressure difference to deliver oil to various lubrication points. The disadvantage of this method is that the oil is prone to deterioration under high-pressure, high-temperature conditions, and the amount of oil supplied depends entirely on the pressure difference, resulting in a mismatch between the actual oil supply and the oil demand at different speeds. Furthermore, the pressure difference can fail under certain conditions. The other type is the low-pressure chamber type, which uses an oil pump. This type places the motor and oil sump in a low-pressure, low-temperature chamber, with gear-type oil pumps being the mainstream method.

[0004] However, the existing rotor oil pump has a relatively simple internal structure and lacks a certain bearing thrust structure, which cannot effectively limit the axial displacement of the rotor, thus affecting the performance of the oil pump. Utility Model Content

[0005] The purpose of this invention is to solve the problem mentioned in the background art that the oil pump lacks a certain bearing thrust structure, which makes it impossible to effectively limit the axial displacement of the rotor, and to propose an oil pump with a thrust bearing structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An oil pump with a non-shaft bearing structure includes a pump body, an inner rotor, and an outer rotor. The pump body includes an oil inlet and an oil outlet. The outer rotor is rotatably inserted into the pump body. The inner rotor is meshed with the interior of the outer rotor. A sealing plate and a thrust bearing are embedded on the side of the pump body near the oil outlet. The edge of the thrust bearing is provided with multiple riveting points. The inner wall of the pump body is provided with multiple riveting grooves corresponding to the riveting points.

[0007] Preferably, the outer wall of the pump body is provided with a plurality of reinforcing ribs.

[0008] Preferably, a plurality of fastening blocks are fixedly connected to the side of the pump body near the oil outlet, and the fastening blocks are provided with fastening ports.

[0009] Preferably, a gasket is inserted between the thrust bearing and the sealing plate.

[0010] Preferably, the pump body, inner rotor, outer rotor, thrust bearing, sealing plate, and gasket are all provided with channels corresponding to the oil outlet.

[0011] Preferably, the pump body is provided with multiple positioning bosses around the side near the oil outlet.

[0012] Compared with the prior art, the present invention has the following beneficial effects: By using a thrust bearing, the axial displacement of the rotor can be effectively limited, thereby improving the performance of the oil pump. 2. The reinforcing ribs in this utility model can improve the strength of the pump body, the fastening blocks can facilitate the installation and fixation of the pump body, the positioning boss can facilitate the positioning and fixation of the pump body, and the gaskets can enhance the axial force strength of the thrust bearing. Attached Figure Description

[0013] Fig. 1 This is a three-dimensional front view of an oil pump with a non-shaft bearing structure proposed in this utility model; Fig. 2 This is a three-dimensional rear view schematic diagram of an oil pump with a non-shaft bearing structure proposed in this utility model. Fig. 3 This is an exploded structural diagram of an oil pump with a shaft-stop bearing structure proposed in this utility model.

[0014] In the diagram: 1 Pump body, 2 Inner rotor, 3 Outer rotor, 4 Oil inlet, 5 Oil outlet, 6 Sealing plate, 7 Thrust bearing, 8 Riveting point, 9 Reinforcing rib, 10 Fastening block, 11 Gasket, 12 Positioning boss. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Reference Figs. 1-3 An oil pump with a non-shaft bearing structure includes a pump body 1, an inner rotor 2 and an outer rotor 3. Multiple reinforcing ribs 9 are arranged around the outer wall of the pump body 1 to enhance the strength of the pump body 1. The pump body 1 includes an oil inlet 4 and an oil outlet 5. Multiple positioning bosses 12 are arranged around the side of the pump body 1 near the oil outlet 5 to facilitate positioning and fixing of the pump body 1. Multiple fastening blocks 10 are fixedly connected to the side of the pump body 1 near the oil outlet 5. The fastening blocks 10 are provided with fastening ports to facilitate installation and fixing of the pump body 1. In this embodiment, the outer rotor 3 is rotatably inserted inside the pump body 1, and the inner rotor 2 is meshed and connected inside the outer rotor 3. A sealing plate 6 and a thrust bearing 7 are embedded on the side of the pump body 1 near the oil outlet 5 to limit the axial displacement of the rotor. In this embodiment, a gasket 11 is inserted between the thrust bearing 7 and the sealing plate 6 to enhance the axial force strength of the thrust bearing 7. The edge of the thrust bearing 7 is provided with multiple rivet points 8 to facilitate the installation and fixing of the thrust bearing 7. The inner wall of the pump body 1 is provided with multiple rivet grooves corresponding to the rivet points 8. In this embodiment, the pump body 1, inner rotor 2, outer rotor 3, thrust bearing 7, sealing plate 6, and gasket are all provided with channels corresponding to the oil outlet 5.

[0017] In this embodiment, the reinforcing rib 9 can improve the strength of the pump body 1, the fastening block 10 can facilitate the installation and fixation of the pump body 1, and the positioning boss 12 can facilitate the positioning and fixation of the pump body 1.

[0018] In this embodiment, the axial displacement of the rotor can be effectively limited by the thrust bearing 7, thereby effectively improving the performance of the oil pump.

[0019] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An oil pump having a shaft-stopping bearing structure, comprising a pump body (1), an inner rotor (2) and an outer rotor (3), characterized in that: The pump body (1) includes an oil inlet (4) and an oil outlet (5). The outer rotor (3) is rotatably inserted inside the pump body (1). The inner rotor (2) is meshed and connected to the inside of the outer rotor (3). A sealing plate (6) and a thrust bearing (7) are embedded on the side of the pump body (1) near the oil outlet (5). The edge of the thrust bearing (7) is provided with multiple riveting points (8). The inner wall of the pump body (1) is provided with multiple riveting grooves corresponding to the riveting points (8).

2. An oil pump having a shaft stop bearing structure according to claim 1, characterized in that: The outer wall of the pump body (1) is surrounded by multiple reinforcing ribs (9).

3. The oil pump having a shaft-stopping bearing structure according to claim 1, characterized by: The pump body (1) is fixedly connected to a plurality of fastening blocks (10) on the side near the oil outlet (5), and the fastening blocks (10) are provided with fastening ports.

4. The oil pump having a shaft-stopping bearing structure according to claim 1, characterized by: A gasket (11) is inserted between the thrust bearing (7) and the sealing plate (6).

5. The oil pump having a shaft-stopping bearing structure according to claim 1, characterized by: The pump body (1), inner rotor (2), outer rotor (3), thrust bearing (7), sealing plate (6) and gasket are all provided with channels corresponding to oil outlets (5).

6. The oil pump having a shaft-stopping bearing structure according to claim 1, characterized by: The pump body (1) is surrounded by multiple positioning bosses (12) on the side near the oil outlet (5).

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