CN105114478B - A kind of combined type rotation shaft structure based on wedge key connection - Google Patents

Abstract

The present invention is a combined shaft structure based on wedge key connection, comprising a carbon-carbon shaft, a plurality of wedge keys, a metal shaft, a connecting screw, a first washer, a first lock nut, a second washer, a second locking nut; the connecting screw passes through the carbon-carbon shaft connecting hole and the metal shaft connecting hole, the upper end of the connecting screw is successively installed with the first gasket and the first locking nut, and the lower end of the connecting screw is successively installed with the second gasket and the second For the locking nut, by tightening the first locking nut and the second locking nut, an axial force is applied to the wedge key inclined surface and the metal rotating shaft inclined surface, so that the wedge key is locked and rotated. The invention adopts the wedge key structure, realizes the gapless connection between the carbon-carbon rotating shaft and the metal rotating shaft through axial preloading, and utilizes the excellent heat-proof ability and bearing capacity of the carbon-carbon composite material, as well as the high temperature resistance performance of the superalloy material. And lower thermal conductivity, to ensure that the shaft structure has higher temperature resistance and lower thermal conductivity at the same time.

Description

A combined shaft structure based on wedge key connection

technical field

The invention relates to a combined rotary shaft structure, in particular to a combined rotary shaft structure based on a wedge key connection.

Background technique

Carbon-carbon composites have excellent heat resistance and bearing capacity, but their excessive thermal conductivity will cause the structure temperature to be too high. Superalloy materials have higher temperature resistance and lower thermal conductivity. In order to comprehensively utilize the properties of the two materials, the wedge key structure is used to realize the connection of the two materials' rotating shafts, so as to ensure that the rotating shaft has high temperature resistance and low thermal conductivity at the same time.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a combined rotating shaft structure based on wedge key connection, which has both high temperature resistance and low thermal conductivity.

The combined shaft structure based on wedge key connection according to the present invention includes a pressure ring, a connecting screw, a first locking nut, a second locking nut, a carbon-carbon shaft, a plurality of wedge keys, and a metal shaft. ;

The carbon-carbon shaft is a cylindrical table, the diameter of the upper part of the cylindrical table is larger than the diameter of its lower part, the bottom surface of the upper part of the cylindrical table is a shaft shoulder, and the outer wall of the lower part of the cylindrical table is evenly arranged with a plurality of planes in the circumferential direction as mating surfaces. The number is the same, the center of the carbon-carbon shaft is provided with a carbon-carbon shaft connecting hole for installing the connecting screw;

The bottom of the carbon-carbon rotating shaft is a metal rotating shaft, and the upper part of the metal rotating shaft is a barrel-shaped structure. The position of the inner wall of the barrel-shaped structure corresponding to the matching surface is provided with a metal rotating shaft slope. The slope of the metal rotating shaft slope is the same as that of the wedge key slope. The carbon-carbon rotating shaft There is a metal shaft connecting hole for installing the connecting screw in the center;

The wedge bond is a cuboid structure with a wide upper and a narrow lower, and a wedge bond slope with a slope is set, and the opposite surface of the wedge key slope is a wedge bond plane without slope; the wedge key is arranged on the outer wall of the lower part of the cylindrical platform of the carbon-carbon shaft and the metal Between the inner walls of the upper barrel structure of the rotating shaft, the upper end face of the wedge key is pressed against the shoulder of the carbon-carbon rotating shaft through the pressure ring, the key plane is in close contact with the mating surface on the carbon-carbon rotating shaft, and the wedge key slope and the metal rotating shaft. The inclined surfaces of the metal shaft are in close contact;

The connecting screw rod passes through the carbon-carbon rotating shaft connecting hole and the metal rotating shaft connecting hole, and is fixed by a first locking nut on the upper end of the connecting screw rod and a second locking nut on the lower end of the connecting screw rod.

In the combined shaft structure based on the wedge key connection according to the present invention, the number of the wedge keys is 2 or 4.

In the combined shaft structure based on wedge key connection according to the present invention, the slope of the wedge key is 1:100.

The combined shaft structure based on wedge key connection according to the present invention further includes a first washer and a second washer, and a first washer is arranged between the first locking nut and the upper end face of the carbon-carbon shaft , a second washer is arranged between the second locking nut and the bottom surface of the groove of the metal shaft.

In the combined shaft structure based on wedge key connection according to the present invention, the carbon-carbon shaft is made of carbon-carbon composite material, and the wedge key and the metal shaft are made of high temperature alloy material.

The invention designs a combined rotating shaft structure based on wedge key connection. By adopting the wedge key structure, the gapless connection between the carbon-carbon rotating shaft and the metal rotating shaft can be realized by axial preloading, and the excellent heat protection of the carbon-carbon composite material is used. Capacity and bearing capacity, as well as the high temperature resistance and low thermal conductivity of superalloy materials, ensure that the shaft structure has both high temperature resistance and low thermal conductivity.

Description of drawings

Figure 1 is a schematic diagram of the structure of the combined shaft.

Figure 2 is a schematic diagram of a carbon-carbon shaft.

Figure 3 is a schematic diagram of the carbon-carbon shaft structure.

Figure 4 is a schematic diagram of a wedge bond.

FIG. 5 is a schematic diagram of a metal rotating shaft.

FIG. 6 is a schematic diagram of the structure of the metal rotating shaft.

Among them, 1, carbon-carbon shaft, 2, pressure ring, 3, wedge key, 4, connecting screw, 5, metal shaft, 6, first gasket, 7, first lock nut, 8, second gasket , 9, the second lock nut, 101, mating surface, 102, shoulder, 103, carbon-carbon shaft connection hole, 301, wedge key bevel, 302, wedge key plane, 501, metal shaft bevel, 502, metal shaft connection hole.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments.

The present invention is a combined shaft structure based on wedge key connection, as shown in FIG. 1 , including a carbon-carbon shaft 1, a pressure ring 2, two wedge keys 3, a connecting screw 4, a metal shaft 5, and a first gasket 6. The first lock nut 7 , the second washer 8 , and the second lock nut 9 .

As shown in FIGS. 2 and 3 , the carbon-carbon shaft 1 is made of carbon-carbon composite material, and has a cylindrical platform structure. The diameter of the upper part of the cylindrical platform is larger than that of its lower part, and the bottom surface of the upper part of the cylindrical platform is a shaft shoulder 102. The upper end face of the pressure ring 2 is matched; the outer wall of the lower part of the cylindrical platform is provided with two concave planes separated by 180 degrees in the circumferential direction, namely the mating surface 101, and the mating surface 101 is matched with the wedge key 3, and then matched with the metal shaft 5, Rotation is realized; the center of the carbon-carbon rotating shaft 1 is provided with a through hole, that is, the carbon-carbon rotating shaft connecting hole 103 , for installing the connecting screw 4 .

As shown in FIG. 4 , the wedge key 3 is made of high-temperature alloy material, which is a rectangular parallelepiped structure with a wide top and a narrow bottom, and is provided with a wedge key slope 301 with a slope of 1:100, which cooperates with the metal shaft slope 501 on the metal shaft 5 . ; The opposite surface of the wedge key inclined surface 301 is the wedge key plane 302 , which is matched with the matching surface 101 on the carbon-carbon shaft 1 .

As shown in FIG. 1 , the carbon-carbon rotating shaft 1 is sheathed inside the metal rotating shaft 5 , and the metal rotating shaft 5 is located under the carbon-carbon rotating shaft 1 . As shown in FIG. 5 and FIG. 6 , the metal shaft 5 is made of high temperature alloy material, and the upper part is a barrel-shaped structure. The inner wall of the barrel-shaped structure is evenly provided with metal shaft slopes 501 along the circumferential direction. The number and position of the metal shaft slopes 501 are respectively the same as The number and position of the mating surfaces 101 of the carbon-carbon shaft 1 are matched, and the inclination of the inclined surface 501 of the metal shaft matches the inclination of the inclined surface 301 of the wedge key 3; the lower part of the metal shaft 5 is provided with a groove for installation The second locking nut 9; the center of the metal rotating shaft 5 is provided with a through hole, that is, the metal rotating shaft connecting hole 502, which is used to install the connecting screw 4.

In this embodiment, the carbon-carbon shaft 1 has two mating surfaces 101. In practical applications, a plurality of mating surfaces 101 can be evenly arranged according to requirements. For example, four mating surfaces 101 are arranged 90 degrees apart. The number and the structure of the metal shaft 5 should be changed accordingly.

A combined shaft structure based on wedge key connection according to the present invention, the assembled structure is shown in FIG. 1 . The carbon-carbon rotating shaft 1 is sleeved inside the metal rotating shaft 5, the metal rotating shaft 5 is located under the carbon-carbon rotating shaft 1, and the wedge key 3 is arranged between the lower outer wall of the cylindrical platform of the carbon-carbon rotating shaft 1 and the inner wall of the upper barrel structure of the metal rotating shaft 5 ; The upper end face of the wedge key 3 is pressed against the shoulder 102 of the carbon-carbon shaft 1 through the pressure ring 2, the wedge key plane 302 is in close contact with the mating surface 101 on the carbon-carbon shaft 1, and the wedge key slope 301 is on the metal shaft 5. The metal rotating shaft slope 501 is in close contact; the carbon-carbon rotating shaft 1 and the metal rotating shaft 5 are connected and fixed by the connecting screw 4, the first locking nut 7 and the second locking nut 9, and the connecting screw 4 passes through the carbon-carbon rotating shaft connection hole 103 And the metal shaft connection hole 502 is fixed by the first locking nut 7 on the upper end of the connecting screw 4 and the second locking nut 9 on the lower end of the connecting screw 4, the first locking nut 7 and the upper end surface of the carbon-carbon shaft 1 are fixed. A first washer 6 is arranged between the two, and a second washer 8 is arranged between the second locking nut 9 and the bottom surface of the groove of the metal shaft 5, and the wedge is provided by tightening the first locking nut 7 and the second locking nut 9 The key slope 301 and the metal shaft slope 501 cooperate to exert an axial force, so that the wedge key is locked and rotated.

The embodiments of the present invention have been described in detail above, and the above-mentioned embodiments are only the best embodiments of the present invention, but the present invention is not limited to the above-mentioned embodiments. Various changes can be made without departing from the spirit of the present invention.

Claims (5)

1. A combined shaft structure based on a wedge key connection, comprising a pressure ring (2), a connecting screw (4), a first locking nut (7), and a second locking nut (9), characterized in that: It comprises a carbon-carbon rotating shaft (1), a plurality of wedge bonds (3), and a metal rotating shaft (5); wherein, The carbon-carbon rotating shaft (1) is a cylindrical platform, the diameter of the upper part of the cylindrical platform is larger than the diameter of the lower part, the bottom surface of the upper part of the cylindrical platform is a shaft shoulder (102), and a plurality of planes are uniformly arranged along the circumferential direction on the outer wall of the lower part of the cylindrical platform as mating surfaces (101) , the number of mating surfaces (101) is the same as the number of wedge keys (3), and the carbon-carbon rotating shaft (1) is provided with a carbon-carbon rotating shaft connecting hole (103) in the center of the connecting screw (4); The carbon-carbon rotating shaft (1) is under the metal rotating shaft (5), the upper part of the metal rotating shaft (5) is a barrel-shaped structure, and the position of the inner wall of the barrel-shaped structure corresponding to the matching surface (101) is provided with a metal rotating shaft inclined surface (501), and the metal rotating shaft inclined surface ( The slope of 501) is the same as the slope of the wedge key slope (301), and the center of the carbon-carbon rotating shaft (1) is provided with a metal rotating shaft connecting hole (502) for installing the connecting screw (4); The wedge key (3) is a rectangular parallelepiped structure with a wide upper part and a narrow lower part, and a wedge key slope (301) with a slope is provided, and the opposite surface of the wedge key slope (301) is a wedge key plane (302) without slope; the wedge key ( 3) It is arranged between the lower outer wall of the cylindrical platform of the carbon-carbon shaft (1) and the inner wall of the upper barrel structure of the metal shaft (5), and the upper end face of the wedge key (3) passes through the pressing ring (2) and the carbon-carbon shaft ( 1) The shaft shoulder (102) is pressed tightly, the key plane (302) is in close contact with the mating surface (101) on the carbon-carbon shaft (1), and the wedge key slope (301) is in close contact with the metal shaft on the metal shaft (5). The inclined surfaces (501) are in close contact; The connecting screw (4) passes through the carbon-carbon shaft connecting hole (103) and the metal shaft connecting hole (502), and passes through the first locking nut (7) at the upper end of the connecting screw (4) and the first locking nut (7) at the lower end of the connecting screw (4). Two lock nuts (9) for fixing. 2 . The combined shaft structure based on wedge key connection according to claim 1 , wherein the number of the wedge keys ( 3 ) is 2 or 4. 3 . 3 . The combined shaft structure based on wedge key connection according to claim 1 , wherein the slope of the wedge key slope ( 301 ) is 1:100. 4 . 4. A combined shaft structure based on wedge key connection according to claim 1, characterized in that it further comprises a first washer (6) and a second washer (8), a first lock nut (7) ) and the upper end face of the carbon-carbon shaft (1) is provided with a first washer (6), and between the second locking nut (9) and the bottom surface of the groove of the metal shaft (5) is provided with a second washer (8). 5. A kind of combined rotary shaft structure based on wedge key connection according to claim 1, is characterized in that: carbon-carbon rotary shaft (1) is made of carbon-carbon composite material, wedge key (3) and metal rotary shaft ( 5) Made of high temperature alloy material.