A flange end face connection structure for a propeller shaft forging

Abstract

This utility model relates to the field of propeller shaft flange connection technology, and in particular to a flange end face connection structure for a propeller shaft forging, including a first flange and a second flange. The second flange is located on the right side of the first flange. Two mating grooves are arranged in an annular array on the right side of the first flange. The two mating grooves are set in an inclined annular shape, and the inner ends of the mating grooves gradually extend into the interior of the first flange. Two mating plates are installed in an annular array on the left side of the second flange. The shape of the mating plates is adapted to the shape of the mating grooves, and the mating plates are inserted into the mating grooves by rotation. Six first through holes are arranged in an annular array on the side of the first flange. This utility model, through the insertion of the mating plates and the mating grooves, can not only make the first flange and the second flange more stably connected, but also complete the position correction of the first flange and the second flange, so that the locking bolts can be smoothly inserted between them.

Description

Technical Field

[0001] This utility model relates to the field of propeller shaft flange connection technology, and in particular to a flange end face connection structure for a propeller shaft forging. Background Technology

[0002] The flange end face connection structure of the propeller shaft forging is a high-strength connection component formed by forging process. It is mainly used to realize the reliable connection between the propeller shaft and components such as propeller blades, gearboxes, and drive shafts. It also has the functions of torque transmission, positioning and sealing. The two ends of the propeller shaft are connected to other components such as propeller blades and gearboxes through flanges.

[0003] Common flange end face connection structures mostly use bolt locking for mating. When tightening the bolts, they need to be tightened in a diagonal sequence. If this method is not followed, the flange is prone to deformation or warping due to uneven force during bolt pre-tightening. Furthermore, if the bolts in this connection method become loose, it will directly affect the tightness of the flange mating. Based on this, this application proposes a flange end face connection structure for a propeller shaft forging. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a flange end face connection structure for propeller shaft forgings to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flange end face connection structure for a propeller shaft forging, comprising a first flange and a second flange. The second flange is located on the right side of the first flange. Two mating grooves are arranged in a ring array on the right side of the first flange. The two mating grooves are set as inclined annular rings, and the inner ends of the mating grooves gradually extend into the interior of the first flange. Two mating plates are installed in a ring array on the left side of the second flange, and the shape of the mating plates matches the shape of the mating grooves. The mating plates are inserted into the mating grooves by rotation. Six first through holes are arranged in a ring array on the side of the first flange, and six second through holes are arranged in a ring array on the side of the second flange. A locking bolt is inserted through each second through hole and the corresponding first through hole. A limiting component is sleeved between the left ends of the six locking bolts.

[0006] Optionally, sealing gaskets are provided on the right side of the first flange and the left side of the second flange. When the mating plate is rotated and inserted into the mating groove, the right side of the first flange and the left side of the second flange fit tightly together, and the multiple first through holes on the first flange are aligned one by one with the multiple second through holes on the second flange.

[0007] Optionally, a first positioning plate is installed on both sides of the arc surface of the first flange, and a second positioning plate is installed on both sides of the arc surface of the second flange. A positioning cover is fitted over the corresponding first and second positioning plates. One side of the positioning cover fits against the arc surface of the first and second flanges. Two grooves are opened on the arc surface of the positioning cover, and a fourth through hole is opened on the side of the positioning cover, penetrating the two grooves. A third through hole is opened on the side of the first and second positioning plates. The first and second positioning plates are respectively inserted into the two grooves on the arc surface of the positioning cover. A positioning bolt is inserted through the fourth through hole on the positioning cover and the third through hole on the first and second positioning plates.

[0008] Optionally, the locking bolts are inserted through the first and second through holes from right to left, and an annular groove is provided on the side wall of the left end of each locking bolt. The limiting component is sleeved and engaged between the annular grooves on the left ends of the six locking bolts.

[0009] Optionally, the limiting component includes a first clamping ring and a second clamping ring. Both the first clamping ring and the second clamping ring are set in a semi-circular arc shape, and three slots are opened on the inner wall of both the first clamping ring and the second clamping ring. After the first clamping ring and the second clamping ring are closed and connected, the slots on their inner walls are respectively engaged in the annular grooves on the left end of the corresponding locking bolts.

[0010] Optionally, the top ends of the first clamping ring and the second clamping ring are connected by an external hinge, a connecting groove is provided at the bottom end of the second clamping ring, a connecting plate adapted to the connecting groove is fixedly connected at the bottom end of the first clamping ring, and connecting bolts penetrating the connecting groove and the connecting plate are provided at the bottom ends of the first clamping ring and the second clamping ring.

[0011] The beneficial effects of this utility model are:

[0012] When connecting the second flange to the right side of the first flange, first align the two mating plates on the left side of the second flange with the opening of the mating groove on the right side of the first flange. Then, gradually insert the mating plates into the mating groove by rotating them. During the rotation and insertion process, the second flange will move horizontally and gradually approach the first flange until they are finally fitted together. This can prevent the second flange from deforming or warping due to uneven force during the pre-tightening process. After the two are fully fitted, the second through hole on the second flange is aligned with the first through hole on the first flange, and the second positioning plates on both sides of the second flange are also aligned with the first positioning plates on both sides of the first flange. Then, use positioning bolts to install the positioning cover on the outside of the first and second positioning plates. Then, use locking bolts to lock the first and second flanges in sequence. The mating plate and mating groove insertion method can improve the stability of the connection between the first and second flanges and can also complete the position correction of the two. The first through hole and the second through hole need to be aligned before the locking bolts are inserted. When they are aligned, the first and second flanges are already tightly fitted, so there is no need to use diagonal tightening to fix the locking bolts.

[0013] The limiting component restricts the position of the nuts on the six locking bolts, preventing them from detaching from the bolts. This allows the locking bolts to be stably inserted between the first and second flanges. The locking bolts also prevent the second flange from rotating. Furthermore, with the mating plate and mating groove being inserted together, the second flange cannot be separated from the first flange by horizontal movement. Therefore, even if the locking bolts become loose, the second flange can still maintain a tight mating fit with the first flange. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the first flange of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the second flange of this utility model;

[0018] Figure 4 This is a cross-sectional structural diagram of the connection between the first flange and the second flange of this utility model;

[0019] Figure 5 This is a schematic diagram of the positioning cover of this utility model;

[0020] Figure 6This is a schematic diagram of the locking bolt and limiting assembly of this utility model;

[0021] Figure 7 This is a schematic diagram of the limiting component of this utility model;

[0022] In the diagram: 1. First flange; 2. Butt groove; 3. First through hole; 4. First positioning plate; 5. Second flange; 6. Butt plate; 7. Second through hole; 8. Second positioning plate; 9. Positioning cover; 91. Groove; 92. Fourth through hole; 10. Positioning bolt; 11. Locking bolt; 111. Annular groove; 12. Limiting assembly; 121. First clamping ring; 122. Second clamping ring; 123. Connecting plate; 124. Connecting groove; 13. Slot; 14. External hinge; 15. Connecting bolt. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] Please see Figures 1-7 This utility model provides a technical solution: a flange end face connection structure for a propeller shaft forging, including a first flange 1 and a second flange 5. The second flange 5 is located on the right side of the first flange 1. Two mating grooves 2 are arranged in a ring array on the right side of the first flange 1. The two mating grooves 2 are set in an inclined annular shape, and the inner ends of the mating grooves 2 gradually extend into the interior of the first flange 1. Two mating plates 6 are installed in a ring array on the left side of the second flange 5. The shape of the mating plates 6 is adapted to the shape of the mating grooves 2, and the mating plates 6 are inserted into the mating grooves 2 by rotation. Six first through holes 3 are arranged in a ring array on the side of the first flange 1. The second flange 5 has six second through holes 7 arranged in a ring array on its side. A locking bolt 11 is inserted between each second through hole 7 and the corresponding first through hole 3. A limiting component 12 is sleeved between the left ends of the six locking bolts 11. By inserting the mating plate 6 into the mating groove 2, the stability of the connection between the first flange 1 and the second flange 5 can be improved, and the position of the two can also be corrected so that the locking bolts 11 can be smoothly inserted between them. Finally, the limiting component 12 is used to constrain the position of the nuts on the multiple locking bolts 11, thereby further improving the tightness of the connection between the first flange 1 and the second flange 5.

[0025] like Figure 4As shown, sealing gaskets are provided on the right side of the first flange 1 and the left side of the second flange 5. When the mating plate 6 is rotated and inserted into the mating groove 2, the right side of the first flange 1 and the left side of the second flange 5 fit tightly together, and the multiple first through holes 3 on the first flange 1 are aligned with the multiple second through holes 7 on the second flange 5. At this time, the locking bolts 11 can be inserted sequentially between the aligned first through holes 3 and second through holes 7. The multiple locking bolts 11 can improve the tightness and firmness of the mating of the first flange 1 and the second flange 5.

[0026] like Figure 1 , Figure 4 and Figure 5 As shown, a first positioning plate 4 is installed on both sides of the arc surface of the first flange 1, and a second positioning plate 8 is installed on both sides of the arc surface of the second flange 5. A positioning cover 9 is fitted over the corresponding first positioning plate 4 and second positioning plate 8. One side of the positioning cover 9 fits against the arc surface of the first flange 1 and the second flange 5. Two grooves 91 are opened on the arc surface of the positioning cover 9, and a fourth through hole 92 is opened on the side of the positioning cover 9, penetrating the two grooves 91. A third through hole is opened on the side of the first positioning plate 4 and the second positioning plate 8, and the first positioning plate 4 and the second positioning plate 8 are respectively inserted into the two grooves 91 on the arc surface of the positioning cover 9. A positioning bolt 10 is inserted through the fourth through hole 92 on the positioning cover 9 and the third through hole on the first positioning plate 4 and the second positioning plate 8. The positioning cover 9 can enhance the stability of the connection between the first positioning plate 4 and the second positioning plate 8, and the alignment of the first positioning plate 4 and the second positioning plate 8 can ensure that the mating plate 6 is fully inserted into the mating groove 2.

[0027] like Figure 1 and Figure 6 As shown, the locking bolt 11 is inserted through the first through hole 3 and the second through hole 7 from right to left. An annular groove 111 is provided on the side wall of the left end of each locking bolt 11. The limiting component 12 is sleeved and engaged between the annular grooves 111 on the left end of the six locking bolts 11. The limiting component 12 can prevent the nut above the locking bolt 11 from loosening and falling off.

[0028] like Figure 6 and Figure 7 As shown, the limiting component 12 includes a first clamping ring 121 and a second clamping ring 122. Both the first clamping ring 121 and the second clamping ring 122 are set in a semi-circular arc shape, and three slots 13 are opened on the inner wall of the first clamping ring 121 and the second clamping ring 122. After the first clamping ring 121 and the second clamping ring 122 are closed and connected, the slots 13 on their inner walls are respectively engaged in the annular grooves 111 at the left end of the corresponding locking bolts 11. Through the mutual engagement of the slots 13 and the annular grooves 111, the limiting component 12 can be prevented from rotating arbitrarily, which can improve the stability of the connection.

[0029] like Figure 6 and Figure 7 As shown, the top ends of the first clamping ring 121 and the second clamping ring 122 are connected by an external hinge 14. A connecting groove 124 is provided at the bottom end of the second clamping ring 122. A connecting plate 123 adapted to the connecting groove 124 is fixedly connected to the bottom end of the first clamping ring 121. A connecting bolt 15 passing through the connecting groove 124 and the connecting plate 123 is provided at the bottom end of the first clamping ring 121 and the second clamping ring 122. The connection of the bottom ends of the first clamping ring 121 and the second clamping ring 122 can be completed by the connecting bolt 15, thereby fixing the position of the limiting component 12 between the annular grooves 111 at the left end of the six locking bolts 11.

[0030] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A flange end face connection structure for a propeller shaft forging, comprising a first flange (1) and a second flange (5), characterized in that, The second flange (5) is located on the right side of the first flange (1). Two mating grooves (2) are arranged in a ring array on the right side of the first flange (1). The two mating grooves (2) are set as inclined rings, and the inner end of the mating grooves (2) gradually extends into the first flange (1). Two mating plates (6) are installed in a ring array on the left side of the second flange (5). The shape of the mating plates (6) is adapted to the shape of the mating grooves (2). The mating plates (6) are inserted into the mating grooves (2) by rotation. Six first through holes (3) are arranged in a ring array on the side of the first flange (1). Six second through holes (7) are arranged in a ring array on the side of the second flange (5). Locking bolts (11) are inserted through each second through hole (7) and the corresponding first through hole (3). A limiting component (12) is sleeved between the left ends of the six locking bolts (11).

2. A flange face joint structure of a paddle shaft forging according to claim 1, wherein Sealing gaskets are provided on the right side of the first flange (1) and the left side of the second flange (5). When the mating plate (6) is rotated and inserted into the mating groove (2), the right side of the first flange (1) and the left side of the second flange (5) fit tightly together, and the multiple first through holes (3) on the first flange (1) are aligned with the multiple second through holes (7) on the second flange (5).

3. A flange face joint structure of a paddle shaft forging according to claim 1, wherein First positioning plates (4) are installed on both sides of the arc surface of the first flange (1), and second positioning plates (8) are installed on both sides of the arc surface of the second flange (5). Positioning covers (9) are fitted on the outside of the corresponding first positioning plates (4) and second positioning plates (8). One side of the positioning cover (9) is in contact with the arc surface of the first flange (1) and the second flange (5). Two grooves (91) are opened on the arc surface of the positioning cover (9), and a fourth through hole (92) is opened on the side of the positioning cover (9) through the two grooves (91). A third through hole is opened on the side of the first positioning plate (4) and the second positioning plate (8). The first positioning plate (4) and the second positioning plate (8) are respectively inserted into the two grooves (91) on the arc surface of the positioning cover (9). Positioning bolts (10) are inserted through the fourth through hole (92) on the positioning cover (9) and the third through hole on the first positioning plate (4) and the second positioning plate (8).

4. A flange face joint structure of a paddle shaft forging according to claim 1, wherein The locking bolt (11) is inserted through the first through hole (3) and the second through hole (7) from right to left. An annular groove (111) is provided on the side wall of the left end of each locking bolt (11). The limiting component (12) is sleeved and engaged between the annular grooves (111) on the left end of the six locking bolts (11).

5. The flange end face connection structure of a propeller shaft forging according to claim 4, characterized in that, The limiting component (12) includes a first clamping ring (121) and a second clamping ring (122). Both the first clamping ring (121) and the second clamping ring (122) are set in a semi-circular arc shape, and three slots (13) are opened on the inner wall of both the first clamping ring (121) and the second clamping ring (122). After the first clamping ring (121) and the second clamping ring (122) are closed and connected, the slots (13) on their inner walls are respectively engaged in the annular groove (111) at the left end of the corresponding locking bolt (11).

6. A flange face joint structure of a paddle shaft forging according to claim 5, wherein The top ends of the first clamping ring (121) and the second clamping ring (122) are connected by an external hinge (14). A connecting groove (124) is provided at the bottom end of the second clamping ring (122). A connecting plate (123) adapted to the connecting groove (124) is fixedly connected to the bottom end of the first clamping ring (121). A connecting bolt (15) penetrating the connecting groove (124) and the connecting plate (123) is provided at the bottom ends of the first clamping ring (121) and the second clamping ring (122).

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