CN201250851Y - Elastic damping coupler for single brace motor - Google Patents

Abstract

The utility model discloses an elastic damping coupler for single brace motor, which comprises a spline shaft (1) whose one end is provided with a flange, a seal ring base (4) which is coaxially and firmly connected to the face of the other end of the spline shaft, and a side board (5), a spring assembly (7), an intermediate block (9), and an active flange (2) which are sleeved on the spline shaft (1), wherein the spring assembly (7) and the intermediate block (9) are externally covered by intermediate rings (10) which are located between the side board (5) and the active flange (2), the side board (5), the intermediate block (9) and the active flange (2) are tightly connected via bolts (11), and a rolling bearing (8) whose outside end face is axially limited by the seal ring base (4) is arranged between the spline shaft (1) and the active flange (2). The utility model resolves the problems of abrasion and oil leakage which are caused when the elastic damping coupler is connected with a single brace motor or a diesel engine, thereby enhancing the service performance and lifetime of the coupler, reinforcing the operating stationarity, reliability and safety of a power system.

Description

Elastic damping couplings for single support motors

technical field

The utility model belongs to the technical field of railway locomotives, in particular to an elastic damping coupling used on a single-support motor.

Background technique

With the deepening of the engine design, the torsional vibration of the engine power unit has attracted more and more attention. It is necessary to suppress torsional vibrations, or to shift dangerous resonances outside the engine's operating speed range.

At present, most elastic damping couplings are used to connect fixed structures at both ends (such as diesel engines and generators). The sealing ring seat 4, the side plate 5 and the driving flange 2 clamp the intermediate ring 10 and the intermediate block 9 and the reed group 7 evenly distributed in the intermediate ring, and are sleeved on the spline shaft 1. The side plate 5, the middle block 9, and the active flange 2 are fastened and connected by bolts 11. The side plate 5 is close to the flange side of the spline shaft, and an O-ring 6 is arranged between the side plate 5 and the spline shaft. The spline shaft 1 is an output component, the flange on the spline shaft 1 is connected with the diesel engine, and the passive flange 3 is connected with the generator.

Generators are generally divided into single-support motors and double-support motors. In the shafting, if the generator is a single-support motor, the support of the generator will partly rely on the coupling. In this case, since the generator is relatively heavy, the direct effect is that the generator presses the active flange 2 during use, so that the active flange 2 directly contacts with the spline shaft 1 and the sealing ring seat 4, resulting in Aggravated wear causes changes in the axis alignment of the shafting system and increases the instability of the entire shafting system. At the same time, it also affects the cooperation between the spline shaft 1 and the side plate 5, so that the journal of the spline shaft 1 is in unilateral contact with the side plate 5, and the compression amount of the compressed rubber O-ring 6 is increased, which will easily cause the coupling to be damaged. The O-ring 6 and the side plate 5 are more worn, the O-ring 6 is not well sealed, and oil leakage occurs. In serious cases, the coupling reed 7 will be more worn or broken, which will affect the safe operation of the power system. .

Utility model content

The purpose of the utility model is to provide an elastic damping coupling that can effectively solve the problems of wear and oil leakage in connection with single-support motors and diesel engines.

The technical scheme of the utility model is: an elastic damping coupling for a single-support motor, comprising a spline shaft with a flange at one end and a sealing ring seat coaxially fixed on the other end surface of the spline shaft, and a set The side plate, reed group, middle block and driving flange on the spline shaft, the middle ring is covered on the reed group and the middle block, and it is located between the side plate and the driving flange, and the middle block in the middle ring is uniform Separate the reed group, the inner end of the reed group is embedded in the keyway of the spline shaft, the side plate, the middle block, and the driving flange are fastened and connected by bolts, and a rolling bearing is arranged between the spline shaft and the driving flange. The outer end surface is axially limited by the sealing ring seat. There is a clearance fit between the rolling bearing, the spline shaft and the active flange.

The utility model installs the rolling bearing between the spline shaft and the driving flange, so that the driving flange does not directly contact with the spline shaft and the sealing ring seat. Rolling bearings can bear radial and axial loads, and have the advantages of allowing high rotational speeds. In terms of alignment, rolling bearings have a certain self-aligning ability, especially when the bearing mounting seat, that is, the concentricity of the spline shaft is good, it can increase the stability of the coupling operation, which also makes up for the single-support motor. The deficiencies in this respect solve the problems of flange, seal ring seat and spline shaft wear. At the same time, due to the supporting function of the rolling bearing, the problem of uneven compression between the O-shaped rubber sealing ring and the side plate is also alleviated, effectively reducing the wear of the rubber sealing ring, and ensuring the sealing effect of the gap at this place.

Preferably, the rolling bearing is a single row deep groove ball bearing.

The beneficial effects of the utility model are: compared with the elastic damping coupling before improvement, the utility model is wear-resistant and leak-proof without affecting the torsional vibration characteristics and technical indicators of the power system of the diesel engine, and improves the coupling performance of the coupling. Its own performance and service life enhance the running stability, reliability and safety of the power system.

Description of drawings

Figure 1 is a schematic diagram of the elastic damping coupling before improvement.

Fig. 2 is a schematic diagram of the utility model.

FIG. 3 is a sectional view of the A-A section of FIG. 1 and the B-B section of FIG. 2 .

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the utility model is further described:

As shown in Figure 2 and Figure 3, the elastic damping coupling for a single-support motor mainly consists of a spline shaft 1, an active flange 2, a passive flange 3, a sealing ring seat 4, a side plate 5, and an O-ring 6 , Reed group 7, rolling bearing 8, middle block 9, middle ring 10, bolt 11 are formed. One end of the spline shaft 1 is provided with a flange, and the other end is coaxially fixedly connected to the sealing ring seat 4 on the end surface. The active flange 2 is set on the rolling bearing 8, the side plate 5, the reed set 7, the middle block 9 and the rolling bearing 8 are set on the spline shaft 1, and the rolling bearing 8 is clearance fit with the spline shaft 1 and the driving flange 2 . The side plate 5 is close to the flange side of the spline shaft 1, and an O-shaped sealing ring 6 is arranged between the side plate 5 and the spline shaft, and the outer end surface of the rolling bearing 8 is axially limited by the sealing ring seat 4 . The middle block 9 evenly separates the reed sets 7 , and makes the inner ends of the reed sets 7 fit into the key grooves 12 of the spline shaft 1 . The reed group 7 and the middle block 9 are covered with a middle ring 10, and are located between the side plate 5 and the driving flange 2; the side plate 5, the middle block 9, and the driving flange 2 are fastened and connected by bolts 11. The passive flange 3 is coaxially fixed on the end face of the active flange 2 . In this embodiment, the rolling bearing 8 is a single-row deep groove ball bearing.

When working, the flange on the spline shaft 1 is connected with the diesel engine, and the passive flange 3 is connected with the generator. When the coupling transmits torque, the spline shaft 1 rotates to drive the side plate 5, the middle block 9 in the middle ring 10 together with the reed set 7 and the active flange 2 to rotate, thereby driving the passive flange 3 to rotate; at the same time, the rolling bearing 8. The inner ring rotates with the spline shaft 1, and the driving flange 2 rotates relative to the outer ring of the rolling bearing 8, so that the driving flange 2 is not in direct contact with the spline shaft 1 and the sealing ring seat 4.

Claims (3)

1. An elastic damping coupling for a single-support motor, comprising a spline shaft (1) with a flange at one end and a sealing ring seat (4) coaxially fixed on the other end surface of the spline shaft (1) , and the side plate (5), reed set (7), middle block (9) and active flange (2) set on the spline shaft (1), the reed set (7), middle block ( 9) An intermediate ring (10) is sheathed and located between the side plate (5) and the active flange (2), and the intermediate blocks (9) in the intermediate ring (10) evenly separate the reed groups (7) , the inner end of the reed group (7) is embedded in the keyway (12) of the spline shaft (1), and the side plate (5), middle block (9) and driving flange (2) are connected through the bolt (11) The fastening connection is characterized in that: a rolling bearing (8) is arranged between the spline shaft (1) and the driving flange (2), and the outer end surface of the rolling bearing (8) is supported by the sealing ring seat (4) to the limit. 2. The elastic damping coupling for a single-support motor according to claim 1, characterized in that: between the rolling bearing (8), the spline shaft (1) and the driving flange (2) is Clearance fit. 3. The elastic damping coupling for a single-support motor according to claim 1 or 2, characterized in that the rolling bearing (8) is a single row deep groove ball bearing.

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