End cover side plate assembly of gear pump

Abstract

The utility model discloses an end cover side plate assembly of a gear pump, which comprises a front cover, a rear cover and two side plates respectively matched with the front cover or the rear cover, the front cover and the rear cover are both provided with a plurality of connecting holes, the rear cover is provided with two flow channels, the two side plates are both 8-shaped, and the front cover, the rear cover and the two side plates are all provided with two gear shaft holes. Low-pressure unloading grooves and high-pressure unloading grooves are formed in the middle parts of the inner end surfaces of the two side plates; annular sealing grooves are formed in the inner end surfaces of the front cover and the rear cover; w-shaped sealing grooves are formed in the inner end surfaces in the annular sealing grooves of the front cover and the rear cover; sealing rings with corresponding shapes are arranged in the annular sealing grooves and the W-shaped sealing grooves; the thickness of the side plate can be reduced, the processing is convenient, and the comprehensive cost can be reduced.

Description

Technical Field

[0001] This utility model relates to an end cover side plate assembly for a gear pump. Background Technology

[0002] As a power component of a hydraulic system, the gear pump's side plates are key components, designed to increase wear resistance and provide axial compensation for the gear end faces. Existing gear pumps have side plates located between the front cover and the two gears, or the rear cover and the two gears. The front cover, rear cover, and side plates all have two gear shaft holes. Both side plates are figure-eight shaped. The inner end faces of the side plates that mate with the gear end faces have low-pressure and high-pressure unloading grooves. The outer end faces of the side plates that mate with the front or rear cover have W-shaped sealing grooves, each containing a corresponding sealing ring. The presence of these W-shaped sealing grooves results in a thicker side plate and stringent requirements for groove bottom flatness, sidewall verticality, and surface roughness. This necessitates multi-process collaborative machining, increasing complexity and difficulty in processing. Furthermore, the high material removal rate in the sealing groove area leads to low material utilization and increased costs. Summary of the Invention

[0003] The purpose of this utility model is to address the above-mentioned shortcomings of the prior art by providing an end cover side plate assembly for a gear pump, which not only reduces the thickness of the side plate but also facilitates processing and reduces overall costs.

[0004] To achieve the above objectives, this utility model provides an end cover side plate assembly for a gear pump, comprising a front cover, a rear cover, and two side plates that respectively cooperate with the front cover or the rear cover. The front cover and the rear cover are provided with several connecting holes, the rear cover is provided with two flow channels, the two side plates are both figure-eight shaped, the front cover, the rear cover, and the two side plates are all provided with two gear shaft holes, the inner end faces of the two side plates are provided with a low-pressure unloading groove and a high-pressure unloading groove in the middle, and the inner end faces of the front cover and the rear cover are provided with an annular sealing groove. The feature is that the inner end faces of the annular sealing grooves of the front cover and the rear cover are provided with W-shaped sealing grooves, the W-shaped sealing grooves are located radially outside the corresponding two gear shaft holes, and the annular sealing grooves and the W-shaped sealing grooves are provided with sealing rings of corresponding shapes.

[0005] This utility model modifies the W-shaped sealing grooves of the original two side plates to the inner end faces of the front and rear covers. This not only reduces the thickness of the side plates, but also combines the processing of the W-shaped sealing groove with the original annular sealing groove, thus optimizing the processing procedure, making processing more convenient, and reducing overall costs.

[0006] As a further improvement of this utility model, the two sides of the center of each W-shaped sealing groove are connected by a connecting groove located between the corresponding two gear shaft holes, and the corresponding sealing ring is provided with a connecting section placed in the connecting groove; this can improve the stability of the sealing ring installation.

[0007] In summary, this utility model not only reduces the thickness of the side plate but also facilitates processing, thereby reducing overall costs. Attached Figure Description

[0008] Figure 1 This is a front view of an embodiment of the present utility model.

[0009] Figure 2 for Figure 1 Front view of the middle side panel.

[0010] Figure 3 for Figure 1 Front view of the center cover.

[0011] Figure 4 for Figure 1 Front view of the middle rear cover. Detailed Implementation

[0012] The present invention will now be described in further detail with reference to the accompanying drawings.

[0013] like Figures 1 to 4 As shown, an end cover side plate assembly of a gear pump according to this embodiment includes a front cover 1, a rear cover 2, and two side plates 3 that respectively cooperate with the front cover or the rear cover. The front cover 1 and the rear cover 2 are each provided with several connecting holes 4. The rear cover 2 is provided with two flow channels 5 and 6. The two side plates 3 are both figure-eight shaped. The front cover 1, the rear cover 2, and the two side plates 1 are each provided with two gear shaft holes 7 and 8. The inner end face of the two side plates 3 is provided with a low-pressure unloading groove 9 and a high-pressure unloading groove 10. The inner end face of the front cover 1 and the rear cover 2 is provided with an annular sealing groove. 11 or 12; A W-shaped sealing groove 13 is provided on the inner end face of the annular sealing groove 11 of the front cover 1, and a W-shaped sealing groove 14 is provided on the inner end face of the annular sealing groove 12 of the rear cover 2. The two sides of the center of the two W-shaped sealing grooves 13 and 14 are connected by a connecting groove 15 or 16 located between the corresponding two gear shaft holes 7 and 8. A sealing ring 17 of corresponding shape is provided in the annular sealing grooves 11 and 12, and a sealing ring 18 of corresponding shape is provided in the W-shaped sealing grooves 13 and 14.

[0014] This utility model modifies the W-shaped sealing grooves of the original two side plates to the inner end faces of the front cover 1 and the rear cover 2, which not only reduces the thickness of the side plate 3, but also combines the processing of the W-shaped sealing grooves 13 and 14 with the original annular sealing grooves 11 and 12, thus optimizing the processing procedure, making processing more convenient, and reducing the overall cost; the sealing ring 18 is placed in the connecting section of the connecting groove 15 or 16, which can improve the stability of the sealing ring installation.

Claims

1. A gear pump end cover side plate assembly, comprising a front cover, a rear cover, and two side plates respectively cooperating with the front cover or the rear cover, wherein the front cover and the rear cover are each provided with several connecting holes, the rear cover is provided with two flow channels, the two side plates are both figure-eight shaped, the front cover, the rear cover, and the two side plates are each provided with two gear shaft holes, the inner end faces of the two side plates are each provided with a low-pressure unloading groove and a high-pressure unloading groove in the middle, and the inner end faces of the front cover and the rear cover are each provided with an annular sealing groove; characterized in that Both the front and rear covers have W-shaped sealing grooves on their inner end faces within the annular sealing grooves, and both the annular and W-shaped sealing grooves have corresponding sealing rings.

2. The end cover side plate assembly of a gear pump according to claim 1, characterized in that: Both sides of the center of each W-shaped sealing groove are connected by a connecting groove located between the corresponding two gear shaft holes, and the corresponding sealing ring is provided with a connecting section placed in the connecting groove.

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