Transmission supporting structure of horizontal centrifugal machine

Abstract

The utility model belongs to the field of centrifugal machine structures, and particularly relates to a horizontal centrifugal machine transmission supporting structure which is installed on a spiral cylinder body of a horizontal centrifugal machine, the spiral cylinder body comprises a large end and a small end, the large end is connected with a large end shaft neck, and a rotary bearing is installed on the large end shaft neck. The small end is connected with a spline shaft through a screw, the spline shaft comprises a screw connecting part, an outer circle supporting part and a spline part, and the diameter of the outer circle supporting part is larger than that of the spline part; the small end is externally connected with a differential mechanism output shaft, an inner hole is formed in the end of the differential mechanism output shaft in the axial direction of the differential mechanism output shaft, the inner hole is sequentially divided into a smooth section and a spline groove from outside to inside, the spline groove is meshed with the spline part, and the smooth section extends to the outer circle supporting part of the spline shaft and is in clearance fit with the outer circle supporting part of the spline shaft to form rotary supporting. The transmission supporting structure is suitable for the horizontal centrifugal machine, rotary supporting can be achieved only through the large-end bearing and the small-end outer circle supporting mechanism, the mechanism is compact, and transmission is stable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to centrifuge structure field, especially relate to a horizontal centrifuge transmission support structure. BACKGROUND

[0002] In horizontal screw discharge sedimentation centrifuge, the rotary body is double rotor structure, the outer rotor is drum, and the inner rotor is screw, and in order to consider the reliability of fixed shaft rotation, bearing support is designed at both ends of the outer rotor (drum) respectively, and bearing support is also designed at both ends of the inner rotor (screw) respectively, one end is length positioning, and the other end is movable in length direction, and the defects of the structure are as follows: (1) the bearing designed at both ends of the screw needs additional space size to accommodate the bearing in the internal space; (2) for small specification products, the use of screw bearing will limit the lower limit diameter of the drum small end discharge port; (3) at the same time, the use of screw bearing will compress the upper limit size of the shaft diameter of the support shaft or transmission shaft, so that the material and strength application are limited; (4) the use of bearing will inevitably bring the eccentricity and eccentric mass of the screw shaft due to the existence of clearance, and then affect the vibration, so that the higher speed limit cannot be reached. CONTENT OF UTILITY MODEL

[0003] The utility model can provide a horizontal centrifuge transmission support structure which is compact in structure and stable in transmission.

[0004] The utility model scheme provides a horizontal centrifuge transmission support structure, is installed at the screw barrel body of horizontal centrifuge, the screw barrel body includes big end and small end, the big end is connected with big end journal, and the big end journal is installed with rotary bearing, the small end is connected with spline shaft through screw, the spline shaft is divided into screw connecting portion, outer circle support portion and spline portion in proper order, and the diameter of outer circle support portion is greater than the diameter of spline portion, the small end is circumscribed with a differential mechanism output shaft, and the differential mechanism output shaft end head is provided with inner hole along its axial direction, the inner hole is divided into smooth section and spline groove from hole outside to hole inside in proper order, the spline groove is engaged with spline portion, and the smooth section extends to the outer circle support portion of spline shaft and is matched with the gap to form rotary support.

[0005] Beneficial effects: the scheme adopts the direct meshing mode of the differential output shaft and the spline shaft, only uses a set of bearing support at the large end of the spiral cylinder body, and applies the radial force to the differential output shaft through the outer circle support part at the small end, thereby supporting by the differential output shaft, compared with the traditional structure of setting bearings at both ends, the scheme saves the bearing at the small end of the spiral cylinder body, so that the diameter of the small end slag outlet can be wider, the slag discharge efficiency is improved, the internal space is saved, the overall structure is more compact, and the space utilization is improved; in addition, through the direct meshing of the spline, the eccentricity problem of the spiral shaft center caused by the bearing clearance is reduced, thereby reducing the vibration, so that the centrifugal machine can reach a higher speed limit, and the stability and operation efficiency of the equipment are improved; at the same time, since the diameter of the outer circle support part is greater than the diameter of the spline part, the radial force (including centrifugal force and gravity) received by the spiral cylinder body is transmitted to the differential through the outer circle support part, and the spline structure does not bear the radial force, thereby effectively protecting the spline and improving the transmission efficiency; finally, since the outer circle support part and the inner hole of the differential output shaft are gap fit, the outer circle support part can play a radial positioning role during assembly, and the spline part focuses on power transmission and no longer bears the positioning function, which reduces the machining difficulty of the spline, and improves the reliability and practicability of the overall structure.

[0006] In summary, the transmission support structure is suitable for the horizontal centrifugal machine, and only the large end bearing and the outer circle support mechanism of the small end can realize rotary support, the mechanism is compact and the transmission is stable.

[0007] Further, the shaft of the differential output shaft is provided with a rotary bearing, and an axle retainer ring for preventing the bearing from moving axially. By providing a rotary bearing on the differential output shaft, the stable connection and rotation between the spiral cylinder body and the differential can be further ensured, and the reliability and durability of the entire transmission system can be improved. In addition to preventing the bearing from moving, the axle retainer ring avoids the vibration and noise problems caused by bearing loosening, and further improves the stability and safety of the equipment.

[0008] Further, the rotary bearing on the large end bearing is a ball bearing or a roller bearing, and the rotary bearing on the differential output shaft is a ball bearing. The large end bearing needs to bear larger radial and axial loads, and the ball bearing or roller bearing is selected to ensure stable operation of the equipment under high load conditions; and the ball bearing is used on the differential output shaft, which can more effectively transmit torque and reduce energy loss, thereby reducing the energy consumption of the equipment.

[0009] Further, the spline groove and spline are both rectangular spline structures or involute spline structures. Rectangular spline has the characteristics of high load capacity and good centering, and is suitable for heavy load and high speed transmission. Involute spline has the characteristics of stable transmission and low noise, and is suitable for precision transmission. According to the specific application scene, the appropriate structure can be selected to optimize the transmission performance and improve the overall efficiency of the equipment.

[0010] Further, the tolerance range of the clearance fit is 0.005-0.03mm, which achieves the technical effect that the oil gap value is less than or equal to that of the same level type deep groove ball bearing (the rotational speed limit of the deep groove ball bearing in the bearing is the highest in the same specification), which can ensure smooth assembly, maximize the assembly precision and radial positioning accuracy after assembly, and minimize the eccentricity and eccentric mass caused during operation. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structural diagram of a horizontal centrifuge transmission support structure.

[0012] Figure 2 It is Figure 1 It is a structural diagram of a horizontal centrifuge transmission support structure.

[0013] The figure shows a ball bearing 1, a large end journal 2, a first screw 3, a spiral barrel body 4, a second screw 5, a spline shaft 6, a screw connection part 6-1, an outer circle support part 6-2, a spline part 6-3, a differential output shaft 7, a smooth section 7-1, a spline groove 7-2, an axle retainer 8, a differential first bearing 9, and a differential second bearing 10. DETAILED DESCRIPTION

[0014] As shown in the figure, a horizontal centrifuge transmission support structure is suitable for the spiral barrel body 4 of a horizontal centrifuge. The spiral barrel body 4 includes a tapered section and two straight sections. The tapered section is located between the two straight sections. The diameter of the left straight section is larger than that of the right straight section. The end of the left straight section is the large end of the spiral barrel body 4, and the end of the right straight section is the small end of the spiral barrel body 4. Figure 1 Figure 2 The large end of the spiral barrel body 4 is fixedly connected to the large end journal 2 by the first screw 3, and the large end journal 2 is a tapered cylinder with a tapered surface. A bearing mounting ring is arranged on the outer ring of the large end journal 2. The ball bearing 1 is installed in the bearing mounting ring to provide rotary support for the spiral barrel body 4.

[0015] The large end of the spiral barrel body 4 is fixedly connected to the large end journal 2 by the first screw 3, and the large end journal 2 is a tapered cylinder with a tapered surface. A bearing mounting ring is arranged on the outer ring of the large end journal 2. The ball bearing 1 is installed in the bearing mounting ring to provide rotary support for the spiral barrel body 4.

[0016] ​The small end of the spiral barrel 4 is connected with the differential mechanism through a spline shaft 6, the spline shaft 6 comprises a screw connecting part 6-1, an outer circle supporting part 6-2 and a spline part 6-3 from left to right, the screw connecting part 6-1 is fixed with the small end of the spiral barrel 4 through the second screw 5, and the diameter of the outer circle supporting part 6-2 is greater than that of the spline part 6-3.

[0017] The differential mechanism output shaft 7 is provided with an inner hole, the inner hole is sequentially divided into a smooth section 7-1 and a spline groove 7-2 from left to right, the spline part 6-3 of the spline shaft 6 is engaged with the spline groove 7-2, the spline part 6-3 and the spline groove 7-2 can be a rectangular spline structure or an involute spline structure, and the actual situation is selected. The smooth section 7-1 of the spline shaft 6 extends to the outer circle supporting part 6-2 of the spline shaft 6, and the two form a clearance fit, the clearance tolerance range is 0.005-0.03 mm, and the two form a radial rotary support. After the centrifugal machine is started, the radial force (gravity and centripetal force) applied to the small end of the spiral barrel 4 is transmitted to the outer circle supporting part 6-2 of the spline shaft 6, and then transmitted to the differential mechanism output shaft 7 to form a force, and the outer circle supporting part 6-2 can also play a radial positioning role in the assembly process.

[0018] The differential mechanism output shaft 7 is provided with a differential mechanism first bearing 9 and a differential mechanism second bearing 10, which are used for supporting the differential mechanism output shaft 7, and the first bearing is provided with an axial retainer 8 for preventing axial movement (the second bearing does not need to be provided with the axial retainer 8 because the outer wall of the differential mechanism bearing is provided with a mounting protrusion).

[0019] In the embodiment, the differential mechanism output shaft 7 is used as a power output part, is stably transmitted to the spiral barrel 4 through the spline shaft 6, and the internal and external speed change mechanisms of the differential mechanism form stable differential rotation speeds between the outer rotor (the rotating drum) and the inner rotor (the spiral barrel 4), so that sedimentation separation and clarification and material pushing actions are performed.

[0020] The above only describes the embodiments of the utility model, and the specific technical solutions and / or common knowledge of the scheme are not described in detail. It should be noted that, for those skilled in the art, without departing from the technical solutions of the utility model, a plurality of deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect and practicability of the utility model. The protection scope of the present application should be subject to the content of the claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A horizontal centrifuge drive support structure mounted at a bowl of a horizontal centrifuge, the bowl comprising a large end and a small end, characterized by: The big end is connected with a big end journal, and a slewing bearing is installed on the big end journal; the small end is connected with a spline shaft through a screw, and the spline shaft is sequentially divided into a screw connecting part, an outer circle supporting part and a spline part, wherein the diameter of the outer circle supporting part is greater than the diameter of the spline part; the small end is circumscribed with a differential output shaft, and an inner hole is arranged at the end head of the differential output shaft in the axial direction, and the inner hole is sequentially divided into a smooth section and a spline groove from the outside of the hole to the inside of the hole, the spline groove is engaged with the spline part, and the smooth section extends to the outer circle supporting part of the spline shaft and cooperates with the outer circle supporting part to form a slewing support.

2. A horizontal centrifuge drive support structure according to claim 1, wherein: The slewing bearing is arranged on the shaft of the differential output shaft, and an axle retainer ring is arranged to prevent the bearing from moving in the axial direction.

3. A horizontal centrifuge drive support structure according to claim 2, wherein: The slewing bearing on the big end bearing is a ball bearing or a roller bearing, and the slewing bearing on the differential output shaft is a ball bearing.

4. A horizontal centrifuge drive support structure according to claim 3, wherein: The spline groove and the spline part are both rectangular spline structures or involute spline structures.

5. A horizontal centrifuge drive support structure according to claim 4, wherein: The tolerance range of the clearance fit is 0.005-0.03 mm.

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