Transmission shaft with internal steam supply

Abstract

The utility model relates to the technical field of transmission shafts, in particular to a transmission shaft with internal steam supply, which comprises an inner shaft and an outer shaft with an opening at one end, the outer shaft is sleeved outside the inner shaft, and steam enters a cavity of the inner shaft through an air inlet pipe, flows in the cavity and is in full contact with the inner shaft for heat exchange, so that the inner shaft is heated. After the inner shaft is heated, heat is transferred to the outer shaft. Heated steam is discharged through the exhaust pipe, and the communication hole in the outer shaft provides a channel for the exhaust pipe, so that the exhaust process is smoothly carried out. The steam can cause certain damage to the transmission shaft in the process of heating the transmission shaft, so that the inner shaft and the outer shaft are arranged to isolate direct contact between the steam and the outer shaft, when the steam mainly damages the inner shaft, as the outer shaft is sleeved on the outer side of the inner shaft, only the inner shaft needs to be replaced, and the maintenance cost and difficulty are reduced. The transmission shaft can be widely applied.

Description

Technical Field

[0001] This utility model relates to the field of transmission shaft technology, and more specifically, to a transmission shaft with internal steam supply. Background Technology

[0002] In numerous industrial applications, drive shafts play a crucial role. However, in low-temperature environments, the viscosity of the lubricating oil inside the drive shaft increases significantly, severely weakening its lubrication performance. This significantly increases the frictional resistance during drive shaft operation, exacerbating wear, reducing transmission efficiency, and shortening the drive shaft's service life. Furthermore, starting the drive shaft at low temperatures causes rapid heating, resulting in uneven thermal expansion of its components. This can easily lead to internal stress concentration, potentially causing deformation or even damage to the drive shaft.

[0003] Preheating the drive shaft offers several advantages in improving this situation. First, preheating effectively reduces the viscosity of the lubricating oil, improving lubrication and reducing friction and wear. Second, preheating ensures a more uniform temperature rise across all components of the drive shaft, reducing thermal stress, preventing damage caused by uneven thermal expansion, and guaranteeing the normal operation and service life of the drive shaft. Utility Model Content

[0004] In view of the problems in the prior art where the drive shaft starts without preheating in low-temperature environments, the high viscosity of the lubricating oil makes it easy for the clamps to wear, and the inconsistent thermal expansion of the various components of the drive shaft during startup causes internal stress concentration, which ultimately affects the performance of the drive shaft; this utility model proposes a drive shaft with internal steam supply.

[0005] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0006] A drive shaft with internal steam supply includes an inner shaft and an outer shaft with one end open. The outer shaft is sleeved on the outside of the inner shaft. The inner shaft has a cavity inside. An air inlet pipe communicating with the cavity is provided on one end wall of the inner shaft. An exhaust pipe communicating with the cavity is provided on the other end wall of the inner shaft. A connecting hole for inserting the exhaust pipe is provided on the bottom wall of the outer shaft.

[0007] Steam enters the cavity of the inner shaft through the inlet pipe, flows within the cavity, and exchanges heat with the inner shaft, thus heating it. The heated inner shaft then transfers heat to the outer shaft. The heated steam is discharged through the exhaust pipe, and the connecting hole on the outer shaft provides a passage for the exhaust pipe, ensuring smooth exhaust.

[0008] Steam can cause some damage to the drive shaft during the heating process. Therefore, an inner shaft and an outer shaft are set up to isolate the steam from direct contact with the outer shaft. When the steam mainly damages the inner shaft, since the outer shaft is sleeved on the outside of the inner shaft, only the inner shaft needs to be replaced, which reduces maintenance costs and difficulty.

[0009] Preferably, multiple baffles are arranged sequentially inside the cavity, and each baffle cooperates with the inner wall of the cavity to form an airflow channel for steam to pass through.

[0010] After entering the cavity of the inner shaft, the steam flows along the airflow channel formed by the cooperation of the baffles and the inner wall of the cavity. The baffles change the flow direction of the steam, increasing the flow path and residence time of the steam in the cavity, thereby enabling the steam to exchange heat with the inner shaft more fully.

[0011] Preferably, multiple locking blocks are fixed on the inner shaft end wall, arranged in a circular array along the inner shaft axis, and a locking groove is provided on the bottom wall of the outer shaft for the locking blocks to engage.

[0012] During assembly, multiple locking blocks arranged in a circumferential array on the inner shaft end wall accurately engage with corresponding slots on the outer shaft bottom wall. This locking structure enables the inner and outer shafts to be connected and fixed circumferentially. This simple and direct locking method facilitates the quick and accurate assembly of the inner and outer shafts, improving production efficiency.

[0013] Preferably, the outer shaft opening is provided with a sealing plate for sealing the opening, and also includes bolts. The sealing plate is fixed to the outer shaft opening with bolts, and the sealing plate has an air inlet for the insertion of the air inlet pipe.

[0014] The sealing plate is secured with bolts, ensuring a strong connection between the sealing plate and the outer shaft, thus making the drive shaft more stable during operation. The air inlet on the sealing plate corresponds to the air inlet pipe of the inner shaft, allowing steam to smoothly enter the air inlet pipe through the air inlet.

[0015] Preferably, a rubber plate is fixed on the end wall of the sealing plate near the inner shaft, and when the sealing plate is fixed on the outer shaft, the rubber plate abuts against the end wall of the inner shaft.

[0016] When the sealing plate is bolted to the outer shaft opening, the rubber plate is compressed and pressed tightly against the end wall of the inner shaft. The rubber plate's flexibility allows it to better conform to the inner shaft end wall, significantly enhancing the sealing effect and effectively preventing steam leakage.

[0017] Preferably, the sidewalls of the sealing plate are evenly distributed with anti-slip protrusions.

[0018] The anti-slip protrusions increase the friction between the hand and the side wall of the sealing plate, allowing the operator to grip the sealing plate more firmly, facilitating installation, disassembly, and adjustment, and improving work efficiency. Attached Figure Description

[0019] Figure 1 This is an exploded view of the drive shaft in the embodiment;

[0020] Figure 2 This is a schematic diagram of the outer shaft in the embodiment;

[0021] Figure 3 This is a schematic diagram of the inner shaft in the embodiment;

[0022] Figure 4 This is a schematic diagram of the inner shaft in cross-section in the embodiment;

[0023] Figure 5 This is a schematic diagram of the sealing plate in the embodiment.

[0024] The names of the parts referred to by the numbers in the attached diagram are as follows:

[0025] 110, Inner shaft; 1101, Cavity; 1102, Intake pipe; 1103, Exhaust pipe; 120, Outer shaft; 1201, Connecting hole; 1202, Slot; 130, Baffle plate; 140, Block; 150, Sealing plate; 1501, Intake hole; 160, Bolt; 170, Rubber plate. Detailed Implementation

[0026] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative of this utility model and are not intended to limit it.

[0027] Example

[0028] like Figures 1-5 As shown, in this embodiment, the internal steam supply drive shaft mainly consists of an inner shaft 110 and an outer shaft 120 with one end open. The outer shaft 120 is sleeved on the outside of the inner shaft 110, and the inner shaft 110 has a cavity 1101 for accommodating steam. One end wall of the inner shaft 110 has an inlet pipe 1102 that communicates with the cavity 1101 for introducing steam; the other end wall of the inner shaft 110 has an exhaust pipe 1103 that communicates with the cavity 1101 for discharging steam. The bottom wall of the outer shaft 120 has a connecting hole 1201 for inserting the exhaust pipe 1103 to ensure a smooth steam discharge path.

[0029] Multiple baffles 130 are arranged sequentially inside the cavity 1101. Each baffle 130 cooperates with the inner wall of the cavity 1101 to form an airflow channel for steam to pass through, which helps to increase the flow time and heat exchange area of ​​steam in the cavity 1101.

[0030] Multiple locking blocks 140 are fixed on the end wall of the inner shaft 110, and these locking blocks 140 are arranged in a circumferential array along the axis of the inner shaft 110. The bottom wall of the outer shaft 120 is provided with a locking groove 1202 corresponding to the locking blocks 140, which is used to fix the inner shaft 110 and the outer shaft 120 in the circumferential direction.

[0031] A sealing plate 150 is provided at the opening of the outer shaft 120 to seal the opening. The sealing plate 150 is fixed to the opening of the outer shaft 120 by bolts 160. An air inlet hole 1501 is provided on the sealing plate 150 for the insertion of the air inlet pipe 1102 to ensure that steam can smoothly enter the inner shaft 110. A rubber plate 170 is fixed to the end wall of the sealing plate 150 near the inner shaft 110. When the sealing plate 150 is fixed to the outer shaft 120, the rubber plate 170 abuts against the end wall of the inner shaft 110 to enhance the sealing effect. Anti-slip protrusions are evenly distributed on the side wall of the sealing plate 150 for easy operation.

[0032] The principle and process of using the internal steam supply drive shaft in this embodiment are as follows:

[0033] During use, steam enters the air inlet pipe 1102 of the inner shaft 110 through the air inlet hole 1501 on the sealing plate 150, and then enters the cavity 1101 of the inner shaft 110. Within the cavity 1101, the steam flows along the airflow channel formed by the baffle plate 130 and the inner wall of the cavity 1101, fully exchanging heat with the inner shaft 110, thus heating the inner shaft 110. The heated inner shaft 110 then transfers heat to the outer shaft 120. The heated steam is discharged through the exhaust pipe 1103 and exits through the connecting hole 1201 on the bottom wall of the outer shaft 120.

[0034] During assembly, the locking block 140 on the end wall of the inner shaft 110 is engaged with the corresponding locking groove 1202 on the bottom wall of the outer shaft 120 to fix the inner shaft 110 and the outer shaft 120 in the circumferential direction. Then, the sealing plate 150 is fixed to the opening of the outer shaft 120 by bolts 160, so that the rubber plate 170 is compressed and tightly pressed against the end wall of the inner shaft 110 to ensure a seal.

[0035] This embodiment uses steam to preheat the drive shaft, thereby improving the performance of the drive shaft. The separable design of the inner shaft 110 and the outer shaft 120 prevents the steam from directly contacting the outer shaft 120, effectively reducing the damage of the steam to the outer shaft 120. This means that if the inner shaft 110 is damaged, only the inner shaft 110 needs to be replaced, which greatly reduces the maintenance cost and difficulty.

[0036] The baffle 130 extends the steam flow path, making heat exchange more thorough and uniform, thus improving heating efficiency and effect. The cooperation between the locking block 140 and the locking groove 1202 ensures the synchronization and stability of the inner shaft 110 and outer shaft 120 during rotation, avoiding relative displacement and loosening. The presence of the rubber plate 170 effectively prevents steam leakage, improves the sealing effect of the drive shaft, and ensures the efficiency of steam utilization and the safety of the working environment. The anti-slip protrusions on the sealing plate 150 increase the convenience and safety of operation, making the installation, disassembly, and adjustment processes easier and more efficient.

[0037] In summary, the above are merely preferred embodiments of this embodiment. All equivalent changes and modifications made in accordance with the scope of the patent application of this embodiment shall fall within the scope of the patent of this embodiment.

Claims

1. A drive shaft with internal steam supply, characterized in that: The device includes an inner shaft (110) and an outer shaft (120) with one end open. The outer shaft (120) is sleeved on the outside of the inner shaft (110). The inner shaft (110) has a cavity (1101) inside. One end wall of the inner shaft (110) is provided with an air intake pipe (1102) that communicates with the cavity (1101). The other end wall of the inner shaft (110) is provided with an exhaust pipe (1103) that communicates with the cavity (1101). The bottom wall of the outer shaft (120) is provided with a connecting hole (1201) for the exhaust pipe (1103) to be inserted.

2. The drive shaft with internal steam supply according to claim 1, characterized in that: Multiple baffles (130) are sequentially distributed inside the cavity (1101), and each baffle (130) cooperates with the inner wall of the cavity (1101) to form an airflow channel for steam to pass through.

3. The drive shaft with internal steam supply according to claim 2, characterized in that: Multiple locking blocks (140) are fixed on the end wall of the inner shaft (110). The locking blocks (140) are arranged in a circumferential array along the axis of the inner shaft (110). The bottom wall of the outer shaft (120) is provided with a locking groove (1202) for the locking blocks (140) to be engaged.

4. The drive shaft with internal steam supply according to claim 3, characterized in that: The outer shaft (120) opening is provided with a sealing plate (150) for sealing the opening, and also includes a bolt (160). The sealing plate (150) is fixed to the opening of the outer shaft (120) by the bolt (160). The sealing plate (150) is provided with an air inlet hole (1501) for inserting an air inlet pipe (1102).

5. A drive shaft with internal steam supply according to claim 4, characterized in that: A rubber plate (170) is fixed on the end wall of the sealing plate (150) near the inner shaft (110). When the sealing plate (150) is fixed on the outer shaft (120), the rubber plate (170) abuts against the end wall of the inner shaft (110).

6. A drive shaft with internal steam supply according to claim 4, characterized in that: The sidewall of the sealing plate (150) is evenly distributed with anti-slip protrusions.

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