Oil pump cavity sealing protection mechanism

Abstract

The utility model discloses a kind of oil transfer pump cavity sealing protection mechanism, it is related to sealing protection mechanism technical field, including pump shell, the driving gear is equipped in the pump shell, the driving gear is engaged with driven gear, driving shaft is fixedly installed in the driving gear and is penetrated, Y-shaped sealing ring is equipped between the driving shaft and pump shell, the side end of Y-shaped sealing ring is equipped with cooling mechanism, annular groove is opened in the side end of pump shell, in the present application, cooling mechanism is set in the side end of Y-shaped sealing ring, using driving shaft rotation drives rotary ring and impeller rotation to generate pressure difference, make cooling liquid in cooling box circulate flow in the space between baffle and Y-shaped sealing ring through circle center pipe, can effectively take away the heat generated by Y-shaped sealing ring due to friction, avoid its failure due to high temperature aging, while cooperating end cap to enhance the sealing effect of extrusion effect of Y-shaped sealing ring, to improve the sealing protection performance and service life of oil transfer pump cavity.

Description

Technical Field

[0001] This utility model relates to the technical field of sealing and protection mechanisms, and in particular to a sealing and protection mechanism for an oil pump cavity. Background Technology

[0002] The function of the fuel transfer pump is to ensure the circulation of diesel fuel within the low-pressure fuel circuit and to supply a sufficient quantity and pressure of fuel to the fuel injection pump. Its fuel transfer rate should be 3-4 times the maximum fuel injection rate at full load. Fuel transfer pumps are classified into gear-type fuel transfer pumps, diaphragm-type fuel transfer pumps, plunger-type fuel transfer pumps, pipeline-type fuel transfer pumps, etc.

[0003] Multiple manufacturers of oil pumps have reported that the Y-shaped seals in the pump housing accumulate significant heat due to friction generated by the rotation of the drive shaft after prolonged operation. Especially during continuous high-load operation, the high temperature accelerates the aging of the Y-shaped seals, reduces their sealing performance, and leads to leakage within the pump housing. This increases the frequency of pump maintenance and raises operating costs.

[0004] As the seals age, their fit with the shaft decreases, and residual liquid impurities gradually erode the shaft surface, forming corrosion marks and further deteriorating the sealing effect. These pain points in practical use prompted us to develop an oil pump cavity sealing protection mechanism that can effectively dissipate heat and extend the life of the seals. Utility Model Content

[0005] Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a sealing and protection mechanism for the oil pump cavity, which solves the technical problem that high temperatures during continuous high-load operation can cause the Y-shaped sealing ring to age faster, resulting in decreased sealing performance, cavity leakage, increased maintenance frequency, and higher operating costs for the oil pump.

[0006] Technical solution To achieve the above objectives, this utility model provides the following technical solution: An oil pump cavity sealing and protection mechanism includes a pump housing, a drive gear inside the pump housing, a driven gear meshing with the drive gear, a drive shaft fixedly installed through the drive gear, a Y-shaped sealing ring between the drive shaft and the pump housing, a cooling mechanism at the side end of the Y-shaped sealing ring, an annular groove at the side end of the pump housing, and the cooling mechanism located within the annular groove in the pump housing.

[0007] Preferably, the cooling mechanism includes a rotating ring, with impellers fixedly mounted on the circumferential surface of the rotating ring. The number of impellers is at least thirty and they are fixedly mounted on the rotating ring at equal intervals around the circumference. A partition is fixedly mounted on the side end of the rotating ring. The partition is located on the side away from the Y-shaped sealing ring. Two central tubes are fixedly mounted on the side end of the partition. A cooling box is provided between the side ends of the two central tubes. The cooling box is used to hold coolant.

[0008] Preferably, the pump housing has an end cover at the rear end, and the end cover is fixedly connected to the pump housing by multiple bolts, and the cooling box is fixedly installed on the side of the end cover.

[0009] The beneficial effects of the technical solutions provided in this application include at least the following: In this new invention, a cooling mechanism is provided on the side of the Y-shaped sealing ring. The rotation of the drive shaft drives the rotating ring and impeller to generate a pressure difference, which causes the coolant in the cooling box to circulate through the central tube in the space between the partition and the Y-shaped sealing ring. This effectively removes the heat generated by friction of the Y-shaped sealing ring, preventing it from failing due to high-temperature aging. At the same time, the compression effect of the end cap on the Y-shaped sealing ring enhances the sealing effect, thereby improving the sealing and protection performance and service life of the oil pump cavity. Attached Figure Description

[0010] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0011] Figure 1 This is a structural diagram of the entire utility model; Figure 2 This is a structural diagram of the pump housing of this utility model; Figure 3 This is a structural diagram of the drive shaft of this utility model; Figure 4 This is a structural diagram of the rotating ring of this utility model.

[0012] Legend: 1. Cooling box; 2. Baffle plate; 3. Central tube; 4. Impeller; 5. Rotating ring; 6. Y-shaped seal ring; 7. Drive shaft; 8. End cover; 9. Pump housing; 10. Drive gear; 11. Driven gear. Detailed Implementation

[0013] This application provides an oil pump cavity sealing and protection mechanism, which effectively solves the technical problem that high temperature during continuous high-load operation causes the Y-shaped sealing ring to age faster, the sealing performance to decline, and cavity leakage to occur, thus increasing the maintenance frequency and operating cost of the oil pump.

[0014] Example like Figure 1 - Figure 4 As shown, the technical solution in this application aims to effectively address the problem that high temperatures during continuous high-load operation cause accelerated aging of the Y-shaped sealing ring, decreased sealing performance, and cavity leakage, leading to increased maintenance frequency and operating costs for the oil pump. The overall approach is as follows: To address the problems existing in the prior art, this utility model provides a sealing and protection mechanism for an oil pump cavity, including a pump housing 9, a drive gear 10 inside the pump housing 9, a driven gear 11 meshing on the drive gear 10, a drive shaft 7 being fixedly installed through the drive gear 10, and a Y-shaped sealing ring 6 being provided between the drive shaft 7 and the pump housing 9.

[0015] The Y-shaped sealing ring 6 has a cooling mechanism on its side end, and the pump housing 9 has an annular groove on its side end. The cooling mechanism is located in the annular groove of the pump housing 9.

[0016] like Figure 4 As shown, the cooling mechanism includes a rotating ring 5, with impellers 4 fixedly mounted on the circumferential surface of the rotating ring 5. There are at least thirty impellers 4, which are fixedly mounted on the rotating ring 5 in a circumferentially equidistant manner. A partition 2 is fixedly mounted on the side end of the rotating ring 5. The partition 2 is away from the Y-shaped sealing ring 6, and a space is formed between the partition 2 and the Y-shaped sealing ring 6. Two central tubes 3 are fixedly mounted on the side end of the partition 2. A cooling box 1 is provided between the side ends of the two central tubes 3 for holding coolant. Since the rotating ring 5 is fixedly connected to the drive shaft 7, when the drive shaft 7 rotates, it will drive the rotating ring 5 and the impellers 4 to rotate. At this time, the impellers 4 will generate a pressure difference in the space between the partition 2, the Y-shaped sealing ring 6, and the drive shaft 7, thereby drawing the coolant in the cooling box 1 through the central tube 3 at its upper end into the space between the partition 2 and the Y-shaped sealing ring 6, and then contacting the Y-shaped sealing ring 6 to remove the heat from the Y-shaped sealing ring 6. After that, it returns to the interior of the cooling box 1 through the central tube 3 at its lower end.

[0017] like Figure 2 and Figure 3 As shown, the pump housing 9 has an end cover 8 at the rear end. The end cover 8 is fixedly connected to the pump housing 9 by multiple bolts. The end cover 8 exerts a certain squeezing effect on the Y-shaped sealing ring 6. The cooling mechanism is also set inside the end cover 8, and the cooling box 1 is fixedly installed on the side of the end cover 8.

[0018] Working principle: In the first step, when the oil pump is working, the drive shaft 7 rotates and drives the drive gear 10 to rotate. The drive gear 10 meshes with the driven gear 11 to realize the liquid transportation function of the oil pump. During this process, the Y-shaped sealing ring 6 between the drive shaft 7 and the pump housing 9 fits tightly and forms an initial seal through its own structural characteristics to prevent liquid leakage inside the pump housing 9.

[0019] In the second step, since the rotating ring 5 is fixedly connected to the drive shaft 7, when the drive shaft 7 rotates, it will synchronously drive the rotating ring 5 and the impeller 4 on the circumferential surface to rotate. The impeller 4 rotates in the space between the partition plate 2 and the Y-shaped sealing ring 6, generating a pressure difference.

[0020] Third, the pressure difference causes the coolant in the cooling box 1 (fixed to the side of the end cap 8, with built-in coolant) to be drawn through the upper central tube 3 into the space between the partition 2 and the Y-shaped sealing ring 6. The coolant comes into direct contact with the Y-shaped sealing ring 6, absorbing the heat generated by friction. Then, the heated coolant flows back to the cooling box 1 through the lower central tube 3 to complete the circulation and heat dissipation, preventing the Y-shaped sealing ring 6 from aging and failing due to high temperature.

[0021] Fourth, the end cap 8 at the rear end of the pump housing 9 is fixed to the pump housing 9 with bolts. This not only applies appropriate compression to the Y-shaped sealing ring 6 to enhance the sealing effect, but also provides installation space for the cooling mechanism, ensuring the stable operation of the overall structure and achieving the dual functions of sealing protection and heat dissipation.

[0022] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A sealing and protection mechanism for an oil pump cavity, comprising a pump housing (9), wherein a drive gear (10) is provided inside the pump housing (9), a driven gear (11) meshes with the drive gear (10), a drive shaft (7) is fixedly installed through the drive gear (10), and a Y-shaped sealing ring (6) is provided between the drive shaft (7) and the pump housing (9). Its features are: The Y-shaped sealing ring (6) is provided with a cooling mechanism on its side end, and the pump housing (9) is provided with an annular groove on its side end. The cooling mechanism is located in the annular groove of the pump housing (9).

2. The oil pump cavity sealing and protection mechanism according to claim 1, characterized in that: The cooling mechanism includes a rotating ring (5), and an impeller (4) is fixedly mounted on the circumferential surface of the rotating ring (5).

3. The oil pump cavity sealing and protection mechanism according to claim 2, characterized in that: The number of impellers (4) is at least thirty, and they are fixedly installed on the rotating ring (5) in a circumferentially equidistant manner.

4. The oil pump cavity sealing and protection mechanism according to claim 3, characterized in that: A partition (2) is fixedly installed on the side of the rotating ring (5), and the partition (2) is located on the side away from the Y-shaped sealing ring (6).

5. The oil pump cavity sealing and protection mechanism according to claim 4, characterized in that: Two central tubes (3) are fixedly installed on the side of the partition (2).

6. The oil pump cavity sealing and protection mechanism according to claim 5, characterized in that: A cooling box (1) is provided between the two ends of the two central tubes (3), and the cooling box (1) is used to hold coolant.

7. The oil pump cavity sealing and protection mechanism according to claim 6, characterized in that: The pump housing (9) has an end cap (8) at its rear end, and the end cap (8) is fixedly connected to the pump housing (9) by multiple bolts.

8. The oil pump cavity sealing and protection mechanism according to claim 7, characterized in that: The cooling box (1) is fixedly installed on the side of the end cover (8).

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