Spiral reamer rotation supporting unit capable of being assembled and disassembled independently

Abstract

A spiral reamer rotation supporting unit capable of being assembled and disassembled independently comprises a bearing seat and a transmission shaft, a flange is arranged at the outer end of the transmission shaft, a supporting bearing gland is installed on the supporting bearing seat on the flange side, a sealing assembly is installed on the outer side of the supporting bearing gland, and the sealing assembly abuts against a shaft shoulder of a supporting shaft. A supporting bearing retainer ring is mounted at the shaft end of the supporting shaft through a locking nut; the supporting bearing seat comprises a flange plate which is fixedly connected with a driving supporting sleeve on the reamer frame, and a supporting bearing chamber is arranged in the supporting bearing seat; the supporting bearing chamber is inserted into the driving supporting sleeve, and the outer diameter of the supporting bearing chamber is equal to the outer diameter of the supporting bearing gland and the outer diameter of the sealing assembly. The outer diameter of the flange is not larger than the outer diameter of the bearing chamber, the outer diameter of the supporting bearing gland and the outer diameter of the sealing assembly. The rotary supporting unit serves as a key component of the spiral dredging machine tool, stable supporting and rotation of the transmission shaft are jointly achieved, and efficient and reliable operation of the machine tool is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental protection dredging engineering, and particularly relates to a spiral reamer slewing support unit that can be independently assembled and disassembled. Background Art

[0002] In the environmental protection dredging engineering of waters such as rivers, lakes, and reservoirs, the spiral reamer, as the core component of the dredger, its stability and maintenance convenience are directly related to the efficiency and cost of the dredging operation. However, the existing spiral reamer slewing support units generally have problems such as complex structure, insufficient stability, and difficult maintenance.

[0003] Specifically, the traditional spiral reamer slewing support unit is closely connected with various components of the spiral reamer structure frame and is difficult to be disassembled independently. When key components such as the transmission shaft or support bearing are worn or faulty, it is often necessary to disassemble the entire support unit or even part of the reamer frame to carry out maintenance or replacement. This design not only increases the complexity and time cost of maintenance, but also may cause other components to be damaged due to improper operation during the disassembly process, further increasing the maintenance burden.

[0004] In addition, due to the lack of sufficient flexibility and adjustability in the structural design of the existing support unit, it is difficult to meet the operation requirements under different working conditions. In a long-term and high-intensity working environment, the support bearing is easily worn and the transmission shaft is easily deformed, resulting in a decrease in the stability of the entire support unit, thereby affecting the dredging efficiency and operation quality.

[0005] Therefore, there is an urgent need in the market for a spiral reamer slewing support unit with stable structure that can be independently assembled and disassembled to solve the above problems existing in the prior art. The proposal of the utility model is based on this demand, aiming to achieve the rapid replacement and convenient maintenance of the spiral reamer slewing support unit through innovative design, and improve the operation efficiency and economic benefits of the dredger. Summary of the Utility Model

[0006] In view of the problems existing in the prior art, the utility model provides a spiral reamer slewing support unit that can be independently assembled and disassembled.

[0007] The present utility model is realized as follows. A spiral reamer slewing support unit that can be independently assembled and disassembled includes a bearing housing. A transmission shaft is installed in the bearing housing through a support bearing. It is characterized in that: a flange is provided at the outer end of the transmission shaft. A bearing gland is installed on the bearing housing on the flange side. The bearing gland abuts against the end face of the bearing housing. A sealing assembly is installed outside the bearing gland. The sealing assembly abuts against the shoulder of the support shaft. A support bearing retaining ring is installed on the shaft end of the support shaft through a locking nut; the bearing housing includes a flange plate fixedly connected to the active support sleeve on the reamer holder. A support bearing chamber for accommodating the support shaft and the active support bearing is provided in the bearing housing; the support bearing chamber is inserted into the active support sleeve, and the outer diameter of the support bearing chamber is equal to the outer diameters of the bearing gland and the sealing assembly; the outer diameter of the flange is not greater than the outer diameters of the bearing chamber, the bearing gland, and the sealing assembly.

[0008] Preferably, there is still a hydraulic motor accommodation chamber on the other side of the bearing housing. A hydraulic motor connected to the transmission shaft is coaxially installed in the hydraulic motor accommodation chamber. The sealing flange of the hydraulic motor is connected to the bearing housing through fasteners. An active sealing cavity is formed between the sealing assembly and the sealing flange. The active sealing cavity is filled with sealing oil.

[0009] Preferably, the pressure of the sealing oil filled in the above support bearing chamber and / or the active sealing cavity is greater than the external fluid pressure.

[0010] Preferably, assembly pre-tightening bolts for connecting with the end face of the transmission shaft are provided on the outer end face of the bearing housing.

[0011] Preferably, the sealing assembly includes a sealing inner ring and a sealing outer ring. Among them, the sealing outer ring is fixedly connected to the bearing gland and the support sleeve through a sealing outer ring cage; the sealing inner ring is fixedly connected to the sealing inner ring cage through fasteners. The sealing inner ring cage is in interference fit with the transmission shaft; a combined sealing assembly is provided between the sealing outer ring and the sealing inner ring.

[0012] Preferably, the combined sealing assembly includes first, second, and third sealing members. First sealing grooves are provided at the mating parts of the sealing inner ring, the bearing gland, and the transmission shaft. After the two first sealing grooves are relatively mated, a first sealing groove is formed. A first sealing member is installed in the first sealing groove; a second sealing member and a third sealing member are provided between the sealing inner ring and the sealing outer ring.

[0013] Preferably, the first sealing member is a floating sealing member; the second sealing assembly is a back-to-back lip-shaped sealing member; the third sealing member is an L-shaped sealing member.

[0014] Advantages and technical effects of the present utility model: The slewing bearing unit, as a key component of the screw dredging machine, jointly realizes the stable support and rotation of the transmission shaft, ensuring the efficient and reliable operation of the machine. The following are the specific technical effects:

[0015] Stable support and high-precision rotation: The slewing bearing unit provides stable support for the transmission shaft through precise bearings and bearing seats, ensuring extremely high stability and precision of the transmission shaft during high-speed rotation, thereby guaranteeing the efficient cutting and conveying of bottom mud by the screw reamer assembly.

[0016] Excellent sealing performance: The slewing bearing unit adopts advanced sealing components and sealing chamber design, effectively preventing impurities such as sediment and water from entering the bearing chamber, protecting the bearings and transmission shaft from wear and corrosion, and significantly extending the service life.

[0017] Convenient disassembly, assembly and maintenance: Through modular design, the slewing bearing unit can be disassembled and repaired as a whole, greatly reducing the maintenance difficulty and cost, and improving the usability and maintenance efficiency of the machine.

[0018] Efficient lubrication and cooling: The slewing bearing unit is equipped with a sealed oil system, which not only enhances the sealing performance, but also realizes efficient lubrication and cooling of the bearings and transmission shaft, further improving the transmission efficiency and service life. Description of the drawings

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a schematic structural diagram of the active slewing bearing unit;

[0021] Figure 3 is a schematic structural diagram of the driven slewing bearing unit.

[0022] In the figure, 1 is the active slewing support unit; 1-1 is the active bearing housing; 1-10 is the active flange; 1-2 is the active support bearing; 1-3 is the active shaft; 1-4 is the active flange; 1-5 is the active bearing gland; 1-6 is the active sealing assembly; 1-60 is the inner sealing ring; 1-61 is the outer sealing ring; 1-62 is the fastener; 1-63 is the outer sealing ring cage; 1-64 is the fastener; 1-65 is the inner sealing ring cage; 1-66 is the first sealing groove; 1-67 is the first sealing member; 1-68 is the second sealing member; 1-69 is the third sealing assembly; 1-7 is the active bearing retaining ring; 1-8 is the hydraulic motor; 1-81 is the protective cover; 1-9 is the sealing flange; 2 is the driven slewing support unit; 2-1 is the driven bearing housing; 2-10 is the driven flange; 2-2 is the driven support bearing; 2-3 is the driven shaft; 2-4 is the driven flange; 2-5 is the driven bearing gland; 2-6 is the driven sealing assembly; 2-7 is the driven bearing retaining ring; 2-8 is the assembly pre-tightening bolt; 3 is the spiral reamer shaft; 4 is the active support sleeve; 5 is the driven support sleeve. Detailed implementation manners

[0023] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] Please refer to Figures 1 to 3 , in the broad field of environmental dredging projects, spiral dredging tools play a crucial role, and their core component - the spiral reamer assembly - directly determines the efficiency and effect of dredging operations. Aiming at the limitations of traditional spiral reamer assemblies in terms of support and transmission, the present utility model proposes a more advanced and efficient design solution, with a particular focus on the innovative optimization of the active slewing support unit and the driven slewing support unit.

[0025] The spiral reamer assembly, as the heart of the tool, needs to bear huge torques and stresses, so stable support at both ends is particularly important. One end is the power end, directly connected to the power source to transmit strong power; the other end is the driven end, following the movement to ensure the overall coordinated operation of the reamer assembly. In order to more clearly elaborate on the core content of the present utility model, the following will take the active slewing support unit and the driven slewing support unit as specific examples for detailed description.

[0026] Example 1, please refer to Figure 2, in this embodiment, the slewing bearing unit is the active slewing bearing unit 1, which includes an active bearing housing 1-1. An active shaft 1-3 is installed in the active bearing housing through an active support bearing 1-2. An active flange 1-4 is provided at the outer end of the active shaft. The active flange 1-4 is detachably connected to the end flange of the spiral reamer shaft 3. An active bearing gland 1-5 is installed on the active shaft on the side of the active flange. The active bearing gland 1-5 abuts against the end face of the active bearing housing to axially position the active support bearing and prevent it from axially moving during operation. This design ensures the stability and transmission accuracy of the active shaft. An active sealing assembly 1-6 is installed outside the active bearing gland. The active sealing assembly abuts against the shoulder of the active shaft to form an effective sealing barrier through the active sealing assembly, preventing impurities such as sediment and water from entering the active bearing chamber and protecting the active support bearing and the active shaft from wear and corrosion. During the actual manufacturing process, in order to reduce the displacement of the active support bearing on the active bearing gland during operation and affect the sealing effect of the active sealing assembly, it is preferred that the active bearing gland is not connected by a fastener connection method. An active bearing retainer 1-7 is installed on the shaft end of the active shaft through a lock nut to axially limit the active support bearing and prevent it from axially moving during operation. This design further enhances the stability and transmission reliability of the active shaft. The active bearing housing includes an active flange plate 1-10 fixedly connected to the active support sleeve on the reamer holder. An active bearing chamber for accommodating the active shaft and the active support bearing and a hydraulic motor accommodating chamber are provided inside the active bearing housing. A hydraulic motor 1-8 connected to the active shaft is coaxially installed in the hydraulic motor accommodating chamber. The output shaft of the hydraulic motor 1-8 and the active shaft are connected by a key connection. The sealing flange 1-9 of the hydraulic motor is connected to the active bearing housing through fasteners. An active sealing cavity is formed between the active sealing assembly and the sealing flange. The active sealing cavity is filled with sealing oil to form an effective sealing barrier to prevent the leakage of sealing oil and the entry of external impurities such as sediment and water into the active sealing cavity. This design improves the transmission efficiency and the overall sealing performance. A protective cover 1-81 is hermetically installed outside the hydraulic motor to protect the hydraulic motor. The active bearing chamber is inserted into the active support sleeve, and the outer diameter of the active bearing chamber is equal to the outer diameters of the active bearing gland and the active sealing assembly. The outer diameter of the active flange is not greater than the outer diameters of the bearing chamber, the active bearing gland, and the sealing assembly, ensuring that the active slewing bearing unit can be independently disassembled along the axial direction.

[0027] In the above technical solution, the active bearing housing, as the main component for supporting and installing the active shaft, is internally designed with an active bearing chamber to accommodate the active shaft and the active support bearing, ensuring the stability and accuracy of the active shaft during rotation. At the same time, the design of the hydraulic motor accommodating chamber enables the hydraulic motor to be coaxially installed on the active shaft to achieve direct drive and improve the transmission efficiency.

[0028] The driving shaft, as a part of the transmission shaft, is installed in the driving bearing housing through the driving support bearing and bears the torque and bending moment during the operation of the spiral reamer assembly. The design of the driving flange enables the driving shaft to be conveniently connected to other components, and at the same time, its outer diameter is not larger than the outer diameters of the bearing chamber, the driving bearing gland, and the sealing assembly, realizing overall disassembly.

[0029] Embodiment 2. Please refer to Figure 3 , in this embodiment, the slewing support unit is the driven slewing support unit 2. The driven slewing support unit 2 includes a driven bearing housing 2-1. A driven shaft 2-3 is installed in the driven bearing housing through a driven support bearing 2-2. A driven flange 2-4 is provided at the outer end of the driven shaft. A driven bearing gland 2-5 is installed on the driven shaft on the side of the driven flange, and the driven bearing gland abuts against the end face of the driven bearing housing; a driven seal assembly 2-6 is installed outside the driven bearing gland, and the driven seal assembly abuts against the shoulder of the driven shaft; a driven bearing retaining ring 2-7 is installed on the shaft end of the driven shaft through a locking nut; the driven bearing housing includes a driven flange plate 2-10 fixedly connected to the driven support sleeve on the reamer holder. A driven bearing chamber for accommodating the driven shaft and the driven support bearing is provided in the driven bearing housing. A driven seal cavity is formed between the driven bearing chamber and the driven seal assembly, and sealing oil is filled in the driven seal cavity; the driven bearing housing is inserted into the driven support sleeve, and the outer diameter of the driven bearing chamber is equal to the outer diameters of the driven bearing gland and the seal assembly; the outer diameter of the driven flange is not larger than the outer diameters of the bearing chamber, the driven bearing gland, and the seal assembly, ensuring that the driven slewing support unit can be disassembled independently along the axial direction.

[0030] The driving slewing support unit in the above Embodiment 1, as the starting point of power transmission, has a delicate design and a stable structure. High-load-bearing support bearings are adopted inside and are precisely installed in a solid bearing housing, providing a solid support foundation for the transmission shaft. The flange structure carefully designed at the outer end of the transmission shaft not only facilitates the quick connection with the power source but also ensures the high efficiency and stability of power transmission. In addition, the innovative design of the seal assembly effectively prevents the intrusion of external impurities and guarantees the long-term durability of the internal machine parts. The driven slewing support unit, as the terminal responder of power transmission, also has a unique design. Echoing the driving end, the driven end also adopts high-performance support bearings and seal assemblies, ensuring the coordination and stability of the overall structure. The unique locking mechanism and anti-loosening design effectively prevent the loosening and failure of components in a long-term vibration environment, further enhancing the reliability and safety of the machine.

[0031] In summary, through the comprehensive optimization and innovative design of the active rotary support unit and the driven rotary support unit in the spiral reamer assembly, the utility model not only significantly improves the dredging efficiency and operation stability of the machine, but also greatly simplifies the maintenance and replacement process and reduces the use cost. This innovative achievement will undoubtedly bring a technological revolution to the field of environmental protection dredging projects and promote the industry to develop in a more efficient and environmentally friendly direction.

[0032] Preferably, assembly pre-tightening bolts 2-8 for connecting with the end face of the driven shaft are provided on the outer end face of the driven bearing seat. When disassembling and assembling the driven rotary support unit, it remains integral and is temporarily fastened to the end of the driven shaft with bolts to provide a fastening force towards the flange side for the driven bearing chamber. After the driven rotary support unit is installed, the temporary fastening bolts are removed, and these holes are plugged with plugs. One hole is opened for ventilation and observing whether the oil filling is in place when refueling, and only half-cavity lubricating oil is ensured.

[0033] Preferably, in accordance with the universality principle, the active sealing assembly and the driven sealing assembly have the same structure, including a sealing inner ring 1-60 and a sealing outer ring 1-61. Among them, in the active sealing assembly, the sealing outer ring is fixedly connected to the active bearing gland 6-5 and the active support sleeve 4 through fasteners 1-62 and a sealing outer ring cage 1-63. In the driven sealing assembly, the sealing outer ring is fixedly connected to the driven bearing gland 2-5 and the driven support sleeve 5 through fasteners; the sealing inner ring is fixedly connected to a sealing inner ring cage 1-65 through fasteners 1-64. The sealing inner ring cage is in interference fit with the active shaft or the driven shaft, which can provide accurate positioning for the sealing assembly, prevent leakage and ensure the stability of the sealing effect, and provide a strong guarantee for the efficient and reliable operation of the spiral dredging machine; a first sealing groove 1-66 is provided at the mating part of the sealing inner ring, the bearing gland and the transmission shaft. After the two first sealing grooves are relatively mated, a first sealing groove is formed, and a first sealing member 1-67 is installed in the first sealing groove; a second sealing member 1-68 and a third sealing member 1-69 are provided between the sealing inner ring and the sealing outer ring.

[0034] The sealing performance of the active sealing assembly and the driven sealing assembly and the efficiency improvement brought by the replaceability as a whole are as follows:

[0035] 1. Sealing performance: Multiple sealing structures, including a first sealing member, a second sealing member and a third sealing member in the assembly, form multiple sealing barriers. This design greatly enhances the sealing effect and effectively prevents external impurities (such as sediment, water, etc.) from invading the bearing chamber, protecting the bearings and the transmission shaft from wear and corrosion.

[0036] 2. Sealing groove design: The first sealing groove is provided on both the sealing inner ring and the bearing gland. After the two grooves are matched with each other, a first sealing groove is formed. This design ensures that the first sealing member can be installed stably and accurately, and fits tightly with the sealing surface, further improving the sealing performance.

[0037] 3. Interference fit and fastener fixation: The retainer of the sealing inner ring and the driving shaft or the driven shaft adopt an interference fit. This fit method can ensure the stable installation of the sealing inner ring on the shaft and reduce the possibility of loosening and leakage. At the same time, the sealing outer ring is fixedly connected to the bearing gland and the support sleeve through fasteners. This connection method enhances the overall stability of the sealing assembly and improves the sealing effect.

[0038] 4. Efficiency improvement brought by overall replaceability: Simplify the maintenance process. Since the active sealing assembly and the driven sealing assembly are designed as a whole, during maintenance or replacement, they can be disassembled and installed integrally with the active slewing bearing and the driven slewing bearing, without disassembling and installing each single seal one by one. This greatly simplifies the maintenance process and reduces the maintenance difficulty and time cost.

[0039] Improve maintenance efficiency: The overall replaceable design enables maintenance personnel to complete the replacement of the sealing assembly more quickly and accurately. When the equipment fails or requires regular maintenance, the normal operation of the equipment can be restored quickly, improving the maintenance efficiency.

[0040] Reduce maintenance costs: The overall replacement design reduces the possible additional damage or waste during the maintenance process. Since there is no need to check and replace each single seal one by one, a large amount of time and material costs can be saved, reducing the maintenance costs.

[0041] In summary, through the multiple sealing structures and the overall replaceable design, the active sealing assembly and the driven sealing assembly achieve excellent sealing performance and an efficient maintenance process. These technical effects act together on the transmission system to ensure its stable, reliable and efficient working state.

[0042] Preferably, the first sealing member is a floating sealing member; the second sealing member is a back-to-back lip seal member; and the third sealing member is an L-shaped sealing member. The selection and combination of these three sealing structures exhibit a significant synergistic effect in terms of technical performance. First, as the last sealing line, the floating sealing member achieves effective sealing by utilizing the pressure difference, being able to flexibly adapt to changes in working conditions and ensuring the stability of the sealing performance. Second, as the second barrier, the back-to-back lip seal member intercepts fine sediment that has passed over the third sealing assembly with the lip facing outwards, and prevents the internal sealing oil from leaking out with the lip facing inwards. Finally, the L-shaped sealing member plays a primary role in sealing and interception. Its structural characteristics can prevent large impurities from entering the interior of the sealing assembly, providing reliable protection for the subsequent sealing structures. The reasonable selection and combination of these three sealing structures jointly ensure the high sealing performance and long-term stable operation of the drive system.

[0043] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A spiral reamer slewing support unit that can be independently assembled and disassembled, comprising a bearing housing, wherein a transmission shaft is installed in the bearing housing through a support bearing, and is characterized in that: A flange is provided at the outer end of the transmission shaft. A bearing gland is installed on the bearing housing on the flange side. The bearing gland abuts against the end face of the bearing housing. A sealing assembly is installed on the outer side of the bearing gland. The sealing assembly abuts against the shoulder of the support shaft. A support bearing retaining ring is installed on the shaft end of the support shaft through a locking nut. The bearing housing includes a flange plate fixedly connected to the active support sleeve on the reamer holder. A support bearing chamber for accommodating the support shaft and the active support bearing is provided in the bearing housing. The support bearing chamber is inserted into the active support sleeve, and the outer diameter of the support bearing chamber is equal to the outer diameters of the bearing gland and the sealing assembly. The outer diameter of the flange is not greater than the outer diameters of the bearing chamber, the bearing gland and the sealing assembly.

2. The independently assembled and disassembled spiral reamer slewing support unit according to claim 1, characterized in that: There is still a hydraulic motor accommodation chamber on the other side of the bearing housing. A hydraulic motor connected to the transmission shaft is coaxially installed in the hydraulic motor accommodation chamber. The sealing flange of the hydraulic motor is connected to the bearing housing through fasteners. An active sealing cavity is formed between the sealing assembly and the sealing flange. The active sealing cavity is filled with sealing oil.

3. The independently assembled and disassembled spiral reamer slewing support unit according to claim 1, characterized in that: The pressure of the sealing oil filled in the above-mentioned support bearing chamber and / or the active sealing cavity is greater than the external fluid pressure.

4. The independently assembled and disassembled spiral reamer slewing support unit according to claim 1, wherein: Assembly pre-tightening bolts for connecting with the end face of the transmission shaft are provided on the outer end face of the bearing housing.

5. The independently assembled and disassembled spiral reamer slewing support unit according to claim 1, wherein: The sealing assembly includes a sealing inner ring and a sealing outer ring. Among them, the sealing outer ring is fixedly connected to the bearing gland and the support sleeve through a sealing outer ring cage. The sealing inner ring is fixedly connected to the sealing inner ring cage through fasteners. The sealing inner ring cage is in interference fit with the transmission shaft. A combined sealing assembly is provided between the sealing outer ring and the sealing inner ring.

6. The independently assembled and disassembled spiral reamer slewing support unit according to claim 5, characterized in that: The combined sealing assembly includes first, second, and third sealing members. First sealing grooves are provided at the mating parts of the sealing inner ring, the bearing gland and the transmission shaft. After the two first sealing grooves are fitted relatively, a first sealing groove is formed. A first sealing member is installed in the first sealing groove. A second sealing member and a third sealing member are provided between the sealing inner ring and the sealing outer ring.

7. The independently assembled and disassembled spiral reamer slewing support unit according to claim 6, wherein: The first sealing member is a floating sealing member; the second sealing member is a back-to-back lip-shaped sealing member; the third sealing member is an L-shaped sealing member.

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