Positioning wheel structure for clamping rotating arm bar

Abstract

The utility model discloses a positioning wheel structure for clamping a rotating arm bar, which comprises more than three positioning wheels which are uniformly arranged in the circumferential direction and are used for clamping the bar in the radial direction, wheel shafts and bearing seats which are matched with the positioning wheels, and each bearing seat is provided with a front end cover, a rear end cover and a first bearing which is arranged in the bearing seat and is sleeved on the wheel shaft. The first bearing divides the interior of the bearing seat into a front cavity and a rear cavity, a mechanical seal is arranged in the front cavity, and a second bearing and a third bearing which are sleeved on the axle are arranged at two ends in the rear cavity. The bar is directly clamped through more than three positioning wheels which are uniformly arranged in the circumferential direction, the length of a cantilever extending out of the bar can be reduced, vibration is effectively reduced, meanwhile, the center of the bar and the center of the plasma torch can be kept concentric as far as possible, the heating uniformity is improved, and the situation that single-face melting of materials is intensified and the plasma torch is impacted along with deep feeding is prevented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to plasma separation powder making equipment, concretely relates to a positioning wheel structure for arm rod material clamping. BACKGROUND

[0002] The plasma separation powder making equipment melts the rod material to be melted under the action of the plasma torch through the rotating electrode, and forms a strong centrifugal force under the action of the high-speed motor driving device, so that the melted material is thrown out in the form of particles to form a fine powder, thereby achieving the purpose of making powder. At present, in the material melting process of the existing powder making equipment, the long arm rod material is directly clamped on the front end motor shaft of the high-speed motor driving device, and then is driven to rotate at high speed and penetrate into the melting furnace. Therefore, the high-speed rotation of the rod material is unbalanced, and the concentricity between the melting torch and the material is poor. With the progress of melting, the unbalance is further increased, thereby causing the equipment vibration to exceed the limit value, causing the equipment to stop, and finally causing the melting to fail to reach the expectation. CONTENT

[0003] The utility model solves the technical problem to provide a positioning wheel structure for arm rod material clamping, which can effectively reduce the length of the cantilever of the rod material and effectively reduce the radial vibration.

[0004] In order to solve the above technical problem, the utility model adopts the following technical scheme:

[0005] A positioning wheel structure for arm rod material clamping, comprising three or more positioning wheels for radially clamping the rod material arranged uniformly in the circumferential direction, wheel shafts and bearing seats matched with the positioning wheels, the positioning wheel being fixed to one end of the corresponding wheel shaft, the other end of the wheel shaft being arranged in the corresponding bearing seat, each bearing seat having front and rear end covers and a first bearing arranged in the bearing seat and sleeved on the wheel shaft, the first bearing dividing the bearing seat into two cavities, the front cavity having a mechanical seal, and the rear cavity having a second bearing and a third bearing sleeved on the wheel shaft at both ends.

[0006] The mechanical seal comprises a rotating ring and a stationary ring both sleeved on the wheel shaft, the rear end of the front cavity having a rotating ring fixed seat fixed to the wheel shaft, the rear end of the rotating ring being fixed to the rotating ring fixed seat, the rear end surface of the stationary ring being abutted against the front end surface of the rotating ring to form a seal, and the front end surface being abutted against the elastic component to form an axial sliding structure.

[0007] The elastic component comprises a spring and a sliding block, the rear end surface of the sliding block being abutted against the front end surface of the stationary ring, and the front end surface being elastically acted by the spring.

[0008] The rear cavity is provided with an oil filling hole, and the front cavity is provided with an oil discharge hole.

[0009] The first bearing is a sliding bearing with an oil filling hole, while the second and third bearings are rolling bearings.

[0010] The first, second, and third bearings are all rolling bearings.

[0011] The front cavity has an impeller structure mounted on the wheel shaft.

[0012] The rear cavity has an impeller structure mounted on the axle.

[0013] The positioning wheel has a concave center and convex sides.

[0014] The positioning wheel structure for clamping bar stock using this invention employs three or more circumferentially evenly arranged positioning wheels to directly clamp the bar stock. This reduces the cantilever length of the extended bar stock, effectively reducing vibration. Simultaneously, it maximizes the concentricity between the center of the bar stock and the center of the plasma torch, improving heating uniformity and preventing one-sided melting of the material from intensifying and impacting the plasma torch as the feed progresses. The flow of bearing lubricating oil effectively removes the heat generated by the bearing rotation. Furthermore, the sliding mechanical seal reduces the impact of axial vibration of the wheel axle on the mechanical seal, extending its service life. Attached Figure Description

[0015] The utility model will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0016] Figure 1 , Figure 2 These are three-dimensional schematic diagrams from different perspectives of the positioning wheel structure for clamping bar stock with a rotary arm according to this utility model;

[0017] Figure 3 This is a radial view of the positioning wheel structure of this utility model;

[0018] Figure 4 This is a cross-sectional view of a single positioning wheel of this utility model;

[0019] Figure 5 This is a schematic diagram showing the positioning wheel structure of this utility model in use. Detailed Implementation

[0020] This utility model provides a positioning wheel structure for clamping bar stock in a rotary arm, as follows: Figures 1-3 As shown, the system includes three or more circumferentially evenly arranged positioning wheels 2 for radially clamping the bar stock 1, wheel axles 3 and bearing seats 4 that mate with each positioning wheel 2. Based on the space size of the plasma separation powder preparation equipment, the required rotational speed for bar stock separation, and the diameter of the bar stock 1, 3-6 positioning wheels 2 are selected in the design. For example... Figures 1-3The number of positioning wheels 2 is selected as three, arranged in inverted V shape and used to clamp the bar. The wheel surface of each positioning wheel 2 is concave in the middle and convex on both sides. By clamping (contacting but not clamping) the bar through the convex surface, the contact surface with the bar can be minimized to reduce the resistance of the bar 1 during the advancing process.

[0021] Please combine Figure 4 As shown, each positioning wheel 2 is fixed to one end of the corresponding wheel shaft 3 through a lock shaft nut, and the other end of the wheel shaft 3 is arranged in the corresponding bearing seat 4. Each bearing seat 4 has front and rear end covers 5, 6, and a first bearing 7 arranged in the bearing seat 4 and sleeved on the wheel shaft 3. The first bearing 7 is located at the middle position of the wheel shaft 3 and serves as the main rotating support. The bearing seat 4 is divided into front and rear cavities 8, 9 by the first bearing 7. The front cavity 8 has a mechanical seal 10, and the rear cavity 9 has second and third bearings 11, 12 sleeved on the wheel shaft 3 at both ends. The second and third bearings 11, 12 can be rolling bearings, which can fix the main shaft and the bearing seat 4 while improving stability.

[0022] The above-mentioned mechanical seal 10 includes a dynamic ring 13 and a static ring 14 sleeved on the wheel shaft 3. The rear end of the front cavity 8 has a dynamic ring fixing seat 15 fixed to the wheel shaft 3. The rear end of the dynamic ring 13 is fixed to the dynamic ring fixing seat 15 and can rotate with the wheel shaft 3. The rear end surface of the front end cover 5 is provided with an annular groove, and the groove is provided with an elastic assembly including a spring 16 and a sliding block 17. The front end surface of the static ring 14 extends into the annular groove and is stationary with the front end cover 5, and abuts against the sliding block 17. The rear end surface of the static ring 14 abuts against the front end surface of the dynamic ring 13 to form a seal, and the two abutting surfaces can rotate relative to each other. The static ring 14 always tightly abuts the two abutting surfaces under the action of the spring 16, achieving the purpose of sealing the inner cavity of the bearing seat 4 from the outside, while reducing the influence of the axial vibration of the wheel shaft 3 on the mechanical seal 10 and improving its service life.

[0023] An oil filling hole 18a is arranged at the upper end of the rear cavity 9 of the bearing seat 4, between the second and third bearings 11, 12. Lubricating oil is continuously injected from the oil filling hole 18a to achieve lubrication and cooling of the bearings. An oil discharge hole 19 is arranged at the lower end of the front cavity 8. The outside of the bearing seat 4 can form a circulating channel for lubricating oil with the oil filling hole 18a through the action of a circulating pump. The circulating flow of lubricating oil can remove heat from the bearings.

[0024] The second and third bearings 11, 12 can be rolling bearings, while the first bearing 7 can be a sliding bearing. An oil filling hole 18b is also arranged on the sliding bearing to lubricate it, and the lubricating oil is discharged through the gap between the sliding bearing and the wheel shaft 3 to the oil discharge hole 19 to form a circulation. Of course, the first bearing 7 can also be a rolling bearing which is easier to install and use.

[0025] As Figure 5 shown, in use, according to the form of the equipment atomizing tank 20 or the actual use demand, the bearing seat 4 of the positioning wheel structure is fixed on the outer wall of the tank 20 through the flange, the positioning wheel 2 is arranged in the tank 20, and the rod material 1 to be pulverized is clamped in the middle of the positioning wheel 2, so that the cantilever distance can be reduced, and the vibration generated in the rotation of the material can be reduced.

[0026] In order to prevent the mechanical seal 10 from leaking oil, the mechanical seal 10 can be replaced by a v-shaped sealing ring structure or a skeleton oil seal structure when the rotating speed of the positioning wheel structure is lower than 8000 rpm.

[0027] When the rotating speed of the positioning wheel structure is lower than 5000 rpm, the oil or oil mist used for lubrication can be replaced by grease, as long as a protective layer can be formed to prevent the bearing from being in rigid contact and worn.

[0028] When oil or oil mist is used for lubrication, in addition to using an additional pumping device and a heat exchanger to realize the cooling and circulation of the liquid, a centrifugal impeller structure can be additionally arranged in the front cavity 8 of the mechanical seal 10 and installed on the wheel shaft 3. Under the action of the high-speed rotation of the wheel shaft 3, the oil is quickly pumped out to the oil discharge hole 19, so that the circulation of the oil is realized. In the rear cavity 9, a propeller impeller structure can also be installed, which also pushes the oil to flow to the oil discharge hole 19 during the rotation of the wheel shaft 3, so that the circulation of the oil is realized.

[0029] In summary, in addition to the advantages that the positioning wheel structure of the utility model can reduce the difficulty of adjusting the balance of the rod material 1 and further improve the stability of the equipment, the positioning wheel structure also has the following advantages: the components in the positioning wheel structure can be purchased in the market standard parts, the maintenance cost is low; in use, the pairing combination mode is used, and the damaged parts can be conveniently disassembled and replaced; the overall structure is compact, the occupied space is small, and it is relatively convenient to add the structure in the existing plasma separation powder production equipment.

[0030] However, those skilled in the art in the technical field should realize that the above embodiments are only used to illustrate the utility model, and are not used as a limitation on the utility model. As long as the changes and modifications of the above described embodiments are within the scope of the utility model, they will fall within the scope of the claims of the utility model.

Claims

1. A positioning wheel structure for a rotary arm bar stock clamping, characterized by: The positioning wheel is arranged circumferentially and uniformly, and is used to radially clamp the bar. The wheel shaft and the bearing seat are installed in cooperation with the positioning wheel. The positioning wheel is fixed to one end of the corresponding wheel shaft, and the other end of the wheel shaft is arranged in the corresponding bearing seat. Each bearing seat has front and rear end covers and a first bearing arranged in the bearing seat and sleeved on the wheel shaft. The first bearing divides the bearing seat into two cavities, i.e., front and rear cavities. The front cavity is provided with a mechanical seal, and the rear cavity is provided with second and third bearings sleeved on the wheel shaft.

2. The positioning wheel arrangement for the rotary arm bar clamping according to claim 1, characterized in that: The mechanical seal comprises a rotating ring and a static ring sleeved on the wheel shaft. The rear end of the front cavity is provided with a rotating ring fixing seat fixed to the wheel shaft, and the rear end of the rotating ring is fixed to the rotating ring fixing seat. An annular groove is arranged on the rear end surface of the front end cover, and an elastic component is arranged in the groove. The rear end surface of the static ring abuts against the front end surface of the rotating ring to form a seal, and the front end surface abuts against the elastic component to form an axial sliding structure.

3. The positioning wheel structure for the rotary arm bar clamping according to claim 2, characterized in that: The elastic component comprises a spring and a sliding block. The rear end surface of the sliding block abuts against the front end surface of the static ring, and the front end surface is elastically acted on by the spring.

4. The positioning wheel arrangement for the rotary arm bar clamping according to claim 1, characterized in that: The rear cavity is provided with an oil filling hole, and the front cavity is provided with an oil discharge hole.

5. The positioning wheel arrangement for the rotary arm bar clamping according to claim 1, characterized in that: The first bearing is a sliding bearing with an oil filling hole, and the second and third bearings are rolling bearings.

6. The positioning wheel arrangement for the rotary arm bar clamping according to claim 1, characterized in that: The first, second and third bearings are rolling bearings.

7. The positioning wheel arrangement for the rotary arm bar clamping according to claim 1, characterized in that: The front cavity is provided with an impeller structure arranged on the wheel shaft.

8. The positioning wheel structure for the rotary arm bar clamping according to claim 1 or 7, characterized in that: The rear cavity is provided with an impeller structure arranged on the wheel shaft.

9. The positioning wheel arrangement for the rotary arm bar clamping according to claim 1, characterized in that: The wheel surface of the positioning wheel is concave in the middle and convex on both sides.

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