Balancing device for seamless tube production

Abstract

The utility model belongs to seamless steel tube production equipment technical field especially relates to a kind of balancing unit for seamless pipe production, including main shaft, the one end of main shaft is equipped with first bearing seat, the connecting part of main shaft and first bearing seat is equipped with self-aligning roller bearing, the both ends of self-aligning roller bearing are equipped with first end cover, one-way flat bottom thrust ball bearing is changed from original 51172 to 51272, self-aligning roller bearing is changed from 23064 to 23164, double-row cylindrical roller bearing is changed from NN3064 to NN3068, increase bearing model to improve load capacity, adapt to main drive torque to promote demand, the material of main shaft, first spacer sleeve and second spacer sleeve is changed from original 45#steel to 42CrMoA forge piece, 42CrMoA forge piece has higher strength, toughness and wear resistance, significantly enhance the overall carrying capacity of equipment, increase main shaft transition arc radius, reduce stress concentration phenomenon, reduce main shaft fracture risk, cooperate with high-quality material, extend the service life of balancing shaft, reduce equipment downtime maintenance time.

Description

Technical Field

[0001] This utility model belongs to the technical field of seamless steel pipe production equipment, and in particular relates to a balancing device for seamless pipe production. Background Technology

[0002] In the production of seamless steel pipes, the piercing mill is a key piece of equipment, and the stability of its main drive system directly affects production efficiency and product quality. The balance shaft is an important component connecting the main drive reducer and the universal joint shaft of the piercing mill unit, playing a crucial role in transmitting torque and supporting the load.

[0003] In existing technology, the balance shaft of the 140 unit uses a main shaft, bearing sleeve, and positioning sleeve made of 45# steel. The bearings used are 51172 thrust bearings, 23064 self-aligning roller bearings, and NN3064 double-row cylindrical roller bearings. With the large-scale production of the 325 and 273 series products, the torque demand of the piercing mill's main drive has increased. The existing balance shaft has the following problems: insufficient bearing load capacity, insufficient strength of the main shaft and accessories materials, and significant stress concentration at transition points. This leads to a significant reduction in the balance shaft's lifespan, a decrease in equipment operating rate, and a sharp increase in maintenance frequency and costs, making it unable to meet production demands. Therefore, we propose a balancing device for seamless tube production. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a balancing device for seamless tube production, thus avoiding issues such as insufficient bearing load capacity, inadequate strength of spindle and accessory materials, and significant stress concentration at transition points.

[0005] In view of this, the present invention provides a balancing device for seamless tube production, comprising a main shaft, a first bearing housing mounted at one end of the main shaft, a self-aligning roller bearing provided at the connection between the main shaft and the first bearing housing, a first end cap mounted at both ends of the self-aligning roller bearing, a first spacer provided at the connection between the main shaft and the first end cap, a second end cap bolted to the outer wall of the first end cap, a retaining washer mounted on the inner wall of the second end cap, a one-way flat-bottomed thrust ball bearing provided on one side of the retaining washer, a second bearing housing mounted at the end of the main shaft away from the first bearing housing, a base welded to the connection between the first bearing housing and the second bearing housing, a double-row cylindrical roller bearing provided at the connection between the main shaft and the second bearing housing, a third end cap mounted at both ends of the double-row cylindrical roller bearing, and a second spacer provided at the connection between the main shaft and the third end cap.

[0006] Based on the above structure, the single-direction flat-bottomed thrust ball bearing was changed from 51172 to 51272, the self-aligning roller bearing was changed from 23064 to 23164, and the double-row cylindrical roller bearing was changed from NN3064 to NN3068. By increasing the bearing model, the load capacity is improved to meet the increased torque requirements of the main drive. The material of the main shaft, the first spacer, and the second spacer was changed from the original 45# steel to 42CrMoA forgings. 42CrMoA forgings have higher strength, toughness, and wear resistance, which significantly enhances the overall load-bearing capacity of the equipment, increases the transition radius of the main shaft, reduces stress concentration, reduces the risk of main shaft breakage, and, together with high-quality materials, extends the service life of the balance shaft and reduces equipment downtime for maintenance.

[0007] Preferably, the main shaft, the first spacer, and the second spacer are all made of 42CrMoA forgings. In this embodiment, the bearing is accurately positioned within the bearing housing.

[0008] Preferably, the transition radius of the mating part between the spindle and the self-aligning roller bearing, the one-way flat-bottomed thrust ball bearing, and the double-row cylindrical roller bearing is increased. In this embodiment, the increased transition radius reduces stress concentration, lowers the risk of spindle breakage, and, combined with high-quality materials, extends the service life of the balance shaft and reduces equipment downtime for maintenance.

[0009] Preferably, the self-aligning roller bearing and the double-row cylindrical roller bearing are radial bearings, and the one-way flat-bottomed thrust ball bearing is a thrust bearing. In this embodiment, the one-way flat-bottomed thrust ball bearing is changed from the original 51172 to 51272, the self-aligning roller bearing is changed from 23064 to 23164, and the double-row cylindrical roller bearing is changed from NN3064 to NN3068. By increasing the bearing model, the load capacity is improved to meet the increased torque requirements of the main drive.

[0010] Preferably, the sealing method between the main shaft and the second end cover is a U-shaped oil seal, and the sealing method between the main shaft and the third end cover is an oil seal Z360. In this embodiment, the sealing performance of the second end cover and the third end cover is improved.

[0011] Preferably, two sets of stop pads are provided. In this embodiment, by providing two sets of stop pads, the stability of the one-way flat-bottomed thrust ball bearing is improved.

[0012] Preferably, the first and second bearing housings are fitted with the bearings according to the dimensions of the bearings. The first bearing housing is a 51272 one-way flat-bottomed thrust ball bearing, the second bearing housing is a 23164 self-aligning roller bearing, and the third bearing housing is a NN3068 double-row cylindrical roller bearing. In this embodiment, it is convenient to stably install the self-aligning roller bearing and the one-way flat-bottomed thrust ball bearing inside the first bearing housing, and to stably install the double-row cylindrical roller bearing inside the second bearing housing.

[0013] The beneficial effects of this utility model are: The balancing device produced by this seamless tube has changed the unidirectional flat-bottomed thrust ball bearing from 51172 to 51272, the self-aligning roller bearing from 23064 to 23164, and the double-row cylindrical roller bearing from NN3064 to NN3068. By increasing the bearing size, the load capacity is improved to meet the increased torque requirements of the main drive. The material of the main shaft, the first spacer, and the second spacer has been changed from the original 45# steel to 42CrMoA forgings. 42CrMoA forgings have higher strength, toughness, and wear resistance, significantly enhancing the overall load-bearing capacity of the equipment. The transition radius of the main shaft is increased, stress concentration is reduced, and the risk of main shaft breakage is lowered. Combined with high-quality materials, the service life of the balance shaft is extended, and the downtime for equipment maintenance is reduced. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall three-dimensional unfolded structure of this utility model; Figure 3 This is a cross-sectional view of the connection structure between the self-aligning roller bearing and the one-way flat-bottomed thrust ball bearing of this utility model. Figure 4 This is a cross-sectional view of the connection structure of the double-row cylindrical roller bearing of this utility model.

[0015] The markings in the diagram are as follows: 1. Main shaft; 2. First bearing housing; 3. Self-aligning roller bearing; 4. First end cover; 5. First spacer; 6. Second end cover; 7. Locking washer; 8. One-way flat-bottomed thrust ball bearing; 9. Second bearing housing; 10. Base; 11. Double-row cylindrical roller bearing; 12. Third end cover; 13. Second spacer. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1 - Figure 4 This application will be described in further detail.

[0017] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0018] This application discloses a balancing device for seamless tube production, including a main shaft 1. A first bearing seat 2 is installed at one end of the main shaft 1. A self-aligning roller bearing 3 is provided at the connection between the main shaft 1 and the first bearing seat 2. A first end cover 4 is installed at both ends of the self-aligning roller bearing 3. A first spacer 5 is provided at the connection between the main shaft 1 and the first end cover 4. A second end cover 6 is bolted to the outer wall of the first end cover 4. A stop pad 7 is installed on the inner wall of the second end cover 6. A one-way flat-bottomed thrust ball bearing 8 is provided on one side of the stop pad 7. A second bearing seat 9 is installed at the end of the main shaft 1 away from the first bearing seat 2. A base 10 is welded to the connection between the first bearing seat 2 and the second bearing seat 9. A double-row cylindrical roller bearing 11 is provided at the connection between the main shaft 1 and the second bearing seat 9. A third end cover 12 is installed at both ends of the double-row cylindrical roller bearing 11. A second spacer 13 is provided at the connection between the main shaft 1 and the third end cover 12.

[0019] Based on the above structure, the single-direction flat-bottomed thrust ball bearing 8 was changed from 51172 to 51272, the self-aligning roller bearing 3 was changed from 23064 to 23164, and the double-row cylindrical roller bearing 11 was changed from NN3064 to NN3068. By increasing the bearing model, the load capacity is improved to meet the increased torque requirements of the main drive. The material of the main shaft 1, the first spacer 5, and the second spacer 13 was changed from the original 45# steel to 42CrMoA forgings. 42CrMoA forgings have higher strength, toughness, and wear resistance, which significantly enhances the overall load-bearing capacity of the equipment, increases the transition radius of the main shaft 1, reduces stress concentration, reduces the risk of main shaft 1 fracture, and, together with high-quality materials, extends the service life of the balance shaft and reduces equipment downtime for maintenance.

[0020] In one embodiment, the main shaft 1, the first spacer 5, and the second spacer 13 are all made of 42CrMoA forgings.

[0021] In this embodiment, the bearing is precisely positioned within the bearing housing.

[0022] In one embodiment, the transition radius of the mating part between the spindle 1 and the self-aligning roller bearing 3, the one-way flat-bottomed thrust ball bearing 8, and the double-row cylindrical roller bearing 11 is increased.

[0023] In this embodiment, the increased transition arc reduces stress concentration, lowers the risk of spindle 1 breakage, and, combined with high-quality materials, extends the service life of the balance shaft and reduces equipment downtime for maintenance.

[0024] In one embodiment, the self-aligning roller bearing 3 and the double-row cylindrical roller bearing 11 are radial bearings, and the one-way flat-bottomed thrust ball bearing 8 is a thrust bearing.

[0025] In this embodiment, the single-direction flat-bottomed thrust ball bearing 8 is changed from the original 51172 to 51272, the self-aligning roller bearing 3 is changed from 23064 to 23164, and the double-row cylindrical roller bearing 11 is changed from NN3064 to NN3068. By increasing the bearing model, the load capacity is improved to meet the increased torque requirements of the main drive.

[0026] In one embodiment, the main spindle 1 and the second end cover 6 are sealed by a U-shaped oil seal, and the main spindle 1 and the third end cover 12 are sealed by an oil seal Z360.

[0027] In this embodiment, the sealing performance of the second end cap 6 and the third end cap 12 is improved.

[0028] In one embodiment, two sets of stop pads 7 are provided.

[0029] In this embodiment, the stability of the one-way flat-bottomed thrust ball bearing 8 is improved by setting two sets of stop pads 7.

[0030] In one embodiment, the first bearing housing 2 and the second bearing housing 9 are fitted with the bearings to meet the installation requirements of the unidirectional flat-bottomed thrust ball bearing 8 (model 51272), the self-aligning roller bearing 3 (model 23164), and the double-row cylindrical roller bearing 11 (model NN3068).

[0031] In this embodiment, it is convenient to stably install the self-aligning roller bearing 3 and the one-way flat-bottomed thrust ball bearing 8 inside the first bearing housing 2, and to stably install the double-row cylindrical roller bearing 11 inside the second bearing housing 9.

[0032] In this embodiment, the balancing device for seamless tube production is first modified by changing the unidirectional flat-bottomed thrust ball bearing 8 from 51172 to 51272, the self-aligning roller bearing 3 from 23064 to 23164, and the double-row cylindrical roller bearing 11 from NN3064 to NN3068. By increasing the bearing size, the load capacity is improved to meet the increased torque requirements of the main drive. The material of the main shaft 1, the first spacer 5, and the second spacer 13 is changed from the original 45# steel to 42CrMoA forgings. 42CrMoA forgings have higher strength, toughness, and wear resistance, significantly enhancing the overall load-bearing capacity of the equipment, increasing the transition radius of the main shaft 1, reducing stress concentration, lowering the risk of main shaft 1 breakage, and extending the service life of the balancing shaft with high-quality materials, thus reducing equipment downtime for maintenance.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A balancing device for seamless tube production, characterized in that, Includes a main shaft (1), one end of which is fitted with a first bearing housing (2). A self-aligning roller bearing (3) is provided at the connection between the main shaft (1) and the first bearing housing (2). Both ends of the self-aligning roller bearing (3) are fitted with first end caps (4). A first spacer (5) is provided at the connection between the main shaft (1) and the first end cap (4). A second end cap (6) is bolted to the outer wall of the first end cap (4). A stop washer (7) is installed on the inner wall of the second end cap (6). One side of the stop washer (7) is provided with... A one-way flat-bottomed thrust ball bearing (8) is provided. A second bearing housing (9) is installed at the end of the main shaft (1) away from the first bearing housing (2). A base (10) is welded to the connection between the first bearing housing (2) and the second bearing housing (9). A double-row cylindrical roller bearing (11) is provided at the connection between the main shaft (1) and the second bearing housing (9). A third end cover (12) is installed at both ends of the double-row cylindrical roller bearing (11). A second spacer (13) is provided at the connection between the main shaft (1) and the third end cover (12).

2. The balancing device for seamless tube production according to claim 1, characterized in that: The main shaft (1), the first spacer (5), and the second spacer (13) are all made of 42CrMoA forgings.

3. The balancing device for seamless tube production according to claim 1, characterized in that: The transition radius of the main shaft (1) at the mating part with the self-aligning roller bearing (3), the one-way flat-bottomed thrust ball bearing (8), and the double-row cylindrical roller bearing (11) is increased.

4. The balancing device for seamless tube production according to claim 1, characterized in that: The self-aligning roller bearing (3) and the double-row cylindrical roller bearing (11) are radial bearings, and the one-way flat-bottomed thrust ball bearing (8) is a thrust bearing.

5. The balancing device for seamless tube production according to claim 1, characterized in that: The main shaft (1) and the second end cover (6) are sealed by a U-shaped oil seal, and the main shaft (1) and the third end cover (12) are sealed by an oil seal Z360.

6. The balancing device for seamless tube production according to claim 1, characterized in that: The stop pad (7) is provided in two sets.

7. The balancing device for seamless tube production according to claim 1, characterized in that: The first bearing housing (2) and the second bearing housing (9) are adapted to the installation requirements of the bearings, namely the 51272 one-way flat-bottomed thrust ball bearing (8), the 23164 self-aligning roller bearing (3), and the NN3068 double-row cylindrical roller bearing (11).

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