A rotary unloader with adjustable and measurable gap.

Abstract

This utility model relates to a rotary unloader capable of gap adjustment and measurement, comprising a sealed housing with an inlet and a outlet, a rotating shaft and a rotor connected to the outside of the rotating shaft within the sealed housing, the inner wall of the sealed housing being tapered axially, the rotor comprising multiple sets of tapered blades, and the rotating shaft being configured to perform axial linear motion; the rotary unloader also includes a cover plate fixedly disposed outside the sealed housing, and a tie rod bracket fixedly connected to the end of the rotating shaft, the outer wall of the tie rod bracket having a first tapered contact surface consistent with the taper of the rotor blades, the cover plate having a protrusion, and the inner wall of the protrusion having a second tapered contact surface consistent with the taper of the inner wall of the sealed housing cavity. This utility model can adjust the horizontal displacement of the rotor so that the sealed housing and the rotor can form a relative sealing surface, and can measure the gap between the rotary unloader's sealed housing and the rotor without disassembling the equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of rotary unloading equipment, specifically a rotary unloader capable of gap adjustment and measurement. Background Technology

[0002] Currently, high-temperature and high-pressure continuous cooking machines use two rotary feeders for material conveying. The upper rotary feeder uses a rotating rotor to uniformly and continuously convey material from upstream into the continuous cooking machine, while the lower rotary feeder uses a rotating rotor to uniformly and continuously convey material from inside the continuous cooking machine to downstream processes. The rotary feeders convey material under high temperature, high pressure, and high humidity conditions. The gap between the blades and the inner wall of the casing cannot be adjusted. If the gap is too large, it will cause insufficient steam pressure inside the continuous cooking machine, affecting the cooking effect and wasting steam; if the gap is too small, it will seize up, requiring shutdown and disassembly for repair. Utility Model Content

[0003] The purpose of this invention is to provide a rotary unloader that allows for gap adjustment and measurement, thereby solving the technical problems mentioned in the background section.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a rotary unloader capable of gap adjustment and measurement, comprising a sealed housing, the sealed housing having an inlet and an outlet, a rotating shaft and a rotor fixedly connected to the outside of the rotating shaft inside the sealed housing, the inner wall of the sealed housing being tapered along the axial direction, the rotor including multiple sets of tapered blades, and the rotating shaft being configured to perform axial linear motion;

[0005] The rotary unloader also includes a cover plate fixedly disposed outside the sealed housing, and a tie rod bracket fixedly connected to the shaft end. The outer wall of the tie rod bracket has a first conical contact surface that matches the taper of the rotor blades. The cover plate is fixedly provided with a protrusion corresponding to the position of the tie rod bracket. The inner wall of the protrusion corresponds to the outer wall of the tie rod bracket, and the inner wall of the protrusion has a second conical contact surface that matches the taper of the inner wall of the sealed housing cavity.

[0006] In a preferred embodiment, the taper of the inner wall of the sealed housing is set to 8-10°, and the taper of the rotor blades is set to 4-6°.

[0007] In a preferred embodiment, the two sides of the sealed housing are respectively fixedly connected to support brackets for supporting the rotating shaft. The rotary unloader also includes a drive assembly connected to one of the support brackets. The cover plate is connected to the support bracket. The drive assembly includes a motor, a reducer, a shaft connected to the output end of the reducer, and a tie rod bracket that rotates with the shaft. The shaft and a lead screw nut fixed at the center of the cover plate are threadedly engaged.

[0008] In a preferred embodiment, the shaft is connected to the tie rod bracket via a thrust bearing, the end of the shaft is connected to a locking nut for fixing the thrust bearing, and the shaft is also provided with a limiting edge for limiting the thrust bearing.

[0009] In a preferred embodiment, the drive assembly further includes a limit sensor fixedly connected to the outer wall of the protrusion. The limit sensor has a first limit adjustment post and a second limit adjustment post extending toward the pull rod bracket. The pull rod bracket is disposed between the first limit adjustment post and the second limit adjustment post.

[0010] In a preferred embodiment, the rotating shaft is further fitted with bushings at positions corresponding to the two support brackets, each bushing capable of rotating synchronously with the rotating shaft, and a rolling bearing is connected between the support brackets and the bushings.

[0011] In a preferred embodiment, a sealing assembly is further connected at the junction of the bushing and the sealing housing. The sealing assembly includes a sealing packing disposed circumferentially along the bushing and a packing gland pressed axially onto the sealing packing.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The rotary unloader provided by this utility model adjusts the horizontal displacement of the rotor so that the rotary unloader sealing shell and the rotor can form a relative sealing surface, preventing or reducing steam leakage. Furthermore, by adopting a cover plate protrusion and a tie rod bracket conical structure with the same taper as both, the gap between the rotary unloader sealing shell and the rotor can be measured without disassembling the equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the rotary unloader that allows for gap adjustment and measurement in this embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of the sealing shell and the rotor in an embodiment of the present invention;

[0016] Figure 3 This is a partial structural diagram of the rotary unloader in an embodiment of the present invention;

[0017] Figure 4 This is a schematic diagram of the structure of the cover plate and the tie rod bracket in an embodiment of the present utility model;

[0018] Figure 5 This is a schematic diagram of the cover plate and the tie rod bracket at another angle in an embodiment of this utility model;

[0019] Figure 6This is a schematic diagram of the shaft structure in an embodiment of this utility model.

[0020] The meanings of the labels in the diagram are as follows:

[0021] 1. Sealed housing; 2. End cover; 3. Right support bracket; 4. Rotating shaft; 5. Bushing; 6. Rolling bearing; 7. Bearing sealing gland; 8. Packing gland; 9. Sealing packing; 10. Rotor; 11. Left support bracket; 12. Cover plate; 121. Screw nut; 122. Protrusion; 123. Second conical contact surface; 14. Shaft; 141. Spline end; 142. Screw; 143. Bearing mounting end; 144. Threaded end; 145. Limiting edge; 15. Thrust bearing; 16. Locking nut; 17. Tie rod bracket; 171. First conical contact surface; 18. Limit sensor; 181. First limit adjusting column; 182. Second limit adjusting column; 20. Reducer; 21. Servo motor. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] See Figure 1 , Figure 2 This embodiment discloses a rotary unloader capable of gap adjustment and measurement, including a sealed housing 1. The sealed housing 1 has an inlet and an outlet on its upper and lower sides, respectively. Inside the sealed housing 1, there is also a rotating shaft 4 and a rotor 10 fixedly connected to the outside of the rotating shaft 4. The orientation of the rotating shaft 4 is perpendicular to the orientation of the inlet and the outlet. The orientation of the rotating shaft 4 is defined as the axial direction below.

[0025] like Figure 1As shown, the inner wall of the sealed housing 1 is tapered along the axial direction, and the taper of the tapered shape is configured to be 8-10°. Correspondingly, the rotor 10 includes 6-8 sets of tapered blades, which are welded to the outside of the rotating shaft 4, and the taper of the tapered blades is configured to be 4-6°.

[0026] In this embodiment, the rotating shaft 4 is configured to perform axial linear motion, thereby driving the rotor 10 to move, so as to adjust the gap between the outer wall of the rotor 10 and the inner wall of the sealed housing 1.

[0027] Specifically, the rotary unloader further includes a drive assembly for driving the rotating shaft 4 to move axially, the drive assembly being fixedly connected to one side of the sealed housing 1. For example... Figure 1 As shown, the sealing housing 1 has end caps 2 fixed on both sides of its axial direction. The rotating shaft 4 passes through the end caps 2 and is sealed to the end caps 2 through the sealing assembly. The end caps 2 on both sides are also fixedly connected to support brackets for supporting the rotating shaft 4, namely the left support bracket 11 and the right support bracket 3. The rotating shaft 4 is rotatably connected to the support brackets. The drive assembly is fixedly connected to one of the support brackets. The structure of the drive assembly will be described in detail below with the left support bracket 11 as an example.

[0028] like Figure 1 As shown, the left support bracket 11 has two parallel mounting plates. The mounting plate closer to the end cover 2 is used to support the rotating shaft 4 and is rotatably connected to the rotating shaft 4. The mounting plate farther away from the end cover 2 has mounting holes, and a cover plate 12 is fixedly connected to the position corresponding to the mounting holes.

[0029] The drive assembly includes a reducer 20 and a servo motor 21 fixedly connected to the cover plate 12, and a shaft 14 connected to the output end of the reducer 20. The reducer 20 is fixedly connected to the outside of the cover plate 12. See [link to documentation]. Figure 6 and combined Figure 3 The shaft 14 further includes a splined end 141, a lead screw 142, a bearing mounting end 143, and a threaded end 144 connected in sequence. Specifically, the cover plate 12 has a through hole at its center. The splined end 141 of the shaft 14 is splinedly engaged with the output end of the reducer 20. The other end of the shaft 14 passes through the through hole, and its lead screw 142 is threadedly engaged with a lead screw nut 121 fixedly connected in the through hole. Thus, the shaft 14 can be rotated by the drive of the servo motor 21 and the reducer 20, and its rotational motion is converted into its own axial motion through the threaded engagement of the shaft 14 and the lead screw nut 121.

[0030] See you again Figure 3A thrust bearing 15 is connected to the bearing mounting end 143 of the shaft 14, and a tie rod bracket 17 is connected through the thrust bearing 15. The tie rod bracket 17 is fixedly connected to the end of the rotating shaft 4. Thus, the rotation and axial movement of the shaft 14 can be converted into the axial movement of the tie rod bracket 17 and the rotating shaft 4. Furthermore, the thrust bearing 15 is fixed to the shaft 14 by a locking nut 16 installed on the threaded end 144 of the shaft 14, and the bearing mounting end 143 of the shaft 14 is also fixed with a limiting edge 145 for limiting the thrust bearing 15. In this embodiment, the locking nut 16 can adjust the fitting clearance between the thrust bearing 15 and the tie rod bracket 17, so that the rotational movement of the shaft 14 can be fully converted into the axial linear movement of the tie rod bracket 17 and the rotating shaft 4, and can also keep the shaft 14 stationary during the rotational movement of the rotating shaft 4.

[0031] See Figure 4 , Figure 5 It should be noted that in this embodiment, the outer wall of the tie rod bracket 17 is constructed with a first conical contact surface 171 that matches the taper of the rotor 10. The inner side of the cover plate 12 is also fixed with a protrusion 122 extending towards the tie rod bracket 17. The inner wall of this protrusion 122 corresponds to the outer wall of the tie rod bracket 17, and the inner wall of the protrusion 122 is constructed as a second conical contact surface 123 that matches the taper of the inner wall of the sealing housing 1 cavity. Since both the protrusion 122 of the cover plate 12 and the sealing housing 1 are fixed, the tie rod bracket 17 and the rotor 10 can move horizontally, and the horizontal displacements are the same. Therefore, by measuring the distance between the first conical contact surface 171 of the tie rod bracket 17 and the second conical contact surface 123 of the protrusion 122 of the cover plate 12, the relative gap between the inner wall of the sealing housing 1 cavity and the rotor 10 can be reflected.

[0032] See Figure 3 , Figure 4Furthermore, the drive assembly also includes a limit sensor 18 fixedly connected to the outer wall of the protrusion 122. The limit sensor 18 has a first limit adjustment post 181 and a second limit adjustment post 182 extending toward the pull rod bracket 17. The end of the pull rod bracket 17 is in a protruding state and is disposed between the first limit adjustment post 181 and the second limit adjustment post 182. In this embodiment, the limit sensor 18 is used for limit protection to prevent the conical rotor 10 from gripping the sealing housing 1 to the left or from pressing against the sealing housing 1 to the right. Specifically, when the pull rod bracket 17 and the rotor 10 move to the left, they contact the first limit adjustment column 181 and generate an electrical signal to the control system, which then controls the servo motor 21 to stop running, preventing the rotor 10 from gripping the inner wall of the sealing housing 1 to the left. When the pull rod bracket 17 and the rotor 10 move to the right, they contact the second limit adjustment column 182 and generate an electrical signal to the control system, which then controls the servo motor 21 to stop running, preventing the rotor 10 from pressing against the inner wall of the sealing housing 1 to the right, causing deformation and damage to the unloader sealing housing 1. It should be noted that the cooperation between the limit sensor 18, the control system, and the servo motor 21 in this embodiment adopts existing technology, and its cooperation structure or principle will not be described in detail here.

[0033] like Figure 1 As shown, to prevent wear on both ends of the rotating shaft 4, the rotating shaft 4 is also fitted with bushings 5 ​​at the positions corresponding to the two support brackets, which can rotate synchronously with the rotating shaft 4. Specifically, a rolling bearing 6 is connected between the support bracket and the bushing 5. The rolling bearing 6 is used to maintain the normal working position and rotation accuracy of the rotating shaft 4. The rolling bearing 6 and the bushing 5 are in transition fit, and a bearing sealing cover 7 for the protection and positioning of the rolling bearing 6 is also provided on the outside of the rolling bearing 6.

[0034] The sealing assembly is connected to the joint between the bushing 5 and the end cap 2. It includes a sealing packing 9 arranged circumferentially along the bushing 5 and a packing gland 8 pressed axially onto the sealing packing 9. In this embodiment, the sealing packing 9 is made of food-grade sealing material, such as tetrafluoroethylene. The packing gland 8 cooperates with the sealing packing 9 to form axial pressure on the sealing packing 9, so that the sealing packing 9 forms a certain radial pressure with the bushing 5 and is in close contact with the rotating shaft 4 to form a seal.

[0035] It is understood that the above-mentioned actions are all controlled by a control system. The control system may specifically include a controller or microcontroller that can control components such as servo motor 21, reducer 20, and limit sensor 18 according to a predetermined program, so that each component can start, stop or perform other actions according to a preset process.

[0036] For ease of understanding, the usage process of the rotary unloader with adjustable and measurable gap provided in this embodiment is described below as an example:

[0037] 1. Equipment debugging: Before installing the rotary unloader, measure the gap difference between the sealing housing 1 and the rotor 10, and between the second conical contact surface 123 of the cover plate 12 and the first conical contact surface 171 of the tie rod bracket 17. The working position of the rotor 10 is when the gap between the sealing housing 1 and the rotor 10 is 200-300μm. Input the working position of the rotor 10 and the gap difference into the control system. Perform this work every time the machine is disassembled for maintenance, and adjust the left and right limits of the limit sensor 18.

[0038] 2. Power on: Confirm that the gap between the sealed housing 1 and the rotor 10 is in the power-on position (the gap is at its maximum and the right position of the limit sensor 18 has not been triggered), and confirm that the initial position of the servo motor 21 displayed by the control system is consistent;

[0039] Start the main drive motor of the rotary unloader. The rotor 10 rotates. After the rotation is normal, start adjusting the gap between the sealing housing 1 and the rotor 10. Start the servo motor 21. Driven by the servo motor 21 and the reducer 20, the shaft 14 rotates at low speed. Through the screw nut 121 in the cover plate 12, the shaft 14 moves horizontally to the left, pulling the tie rod bracket 17, the rotating shaft 4 and the rotor 10 to move horizontally to the left to the working position of the rotor 10. The distance of the rotor 10 moving horizontally to the left is achieved by controlling the number of rotations (angle) of the servo motor 21 by the control system. After the rotor 10 reaches the working position, the servo motor 21 stops running and feeding begins.

[0040] 3. Shutdown: Stop feeding. After the material in the continuous cooker is discharged, perform the shutdown operation of the rotary unloader. Specifically, start the servo motor 21 to reverse. Driven by the servo motor 21 and the reducer 20, the shaft 14 rotates at low speed. Through the screw nut 121 in the cover plate 12, the shaft 14 moves horizontally to the right, and pulls the tie rod bracket 17, the rotating shaft 4 and the rotor 10 to move horizontally to the right to the rotor 10 stop position. After the rotor 10 reaches the stop position, the servo motor 21 stops running and the main drive motor of the rotary unloader stops working.

[0041] The rotary unloader provided in this embodiment employs a specially designed conical rotor 10 and a sealing housing 1. By adjusting the horizontal displacement of the rotor 10, the sealing housing 1 and the rotor 10 can form a relative sealing surface, effectively preventing or reducing steam leakage. A specially designed structure enables indirect measurement of the gap between the rotor 10 and the sealing housing 1, solving the problem of requiring production shutdown and disassembly for gap measurement between the conical rotary valve rotor 10 and the rotary unloader sealing housing 1. The gap adjustment scheme and indirect gap measurement method provided in this embodiment are simple to operate, effectively reduce steam waste, and prevent seizing caused by excessively small gaps.

[0042] 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 rotary unloader capable of gap adjustment and measurement, comprising a sealed housing (1), the sealed housing (1) having an inlet and an outlet, and a rotating shaft (4) and a rotor (10) fixedly connected to the outside of the rotating shaft (4) within the sealed housing (1), characterized in that: The inner wall of the sealed housing (1) is tapered along the axial direction, the rotor (10) includes multiple sets of tapered blades, and the shaft (4) is configured to perform axial linear motion. The rotary unloader also includes a cover plate (12) disposed outside the sealed housing (1) and fixedly disposed thereon, and a tie rod bracket (17) fixedly connected to the shaft end of the rotating shaft (4). The outer wall of the tie rod bracket (17) is constructed with a first conical contact surface (171) that is consistent with the taper of the rotor (10) blade. The cover plate (12) is fixedly provided with a protrusion (122) corresponding to the position of the tie rod bracket (17). The inner wall of the protrusion (122) corresponds to the outer wall of the tie rod bracket (17), and the inner wall of the protrusion (122) is constructed with a second conical contact surface (123) that is consistent with the taper of the inner wall of the sealed housing (1).

2. The rotary discharger with gap adjustment and measurement according to claim 1, characterized in that The taper of the inner wall of the sealed housing (1) is set to 8-10°, and the taper of the blades of the rotor (10) is set to 4-6°.

3. The rotary discharger with gap adjustment and measurement according to claim 1, characterized in that The sealed housing (1) is fixedly connected to two sides of a support bracket for supporting the rotating shaft (4). The rotary unloader also includes a drive assembly connected to one of the support brackets. The cover plate (12) is connected to the support bracket. The drive assembly includes a servo motor (21), a reducer (20), a shaft (14) connected to the output end of the reducer (20), and a tie rod bracket (17) that rotates with the shaft (14). The shaft (14) and the screw nut (121) fixed at the center of the cover plate (12) are threaded together.

4. The rotary discharger with gap adjustment and measurement according to claim 3, characterized in that The shaft (14) is connected to the tie rod bracket (17) via a thrust bearing (15). The end of the shaft (14) is connected to a locking nut (16) for fixing the thrust bearing (15), and the shaft (14) is also provided with a limiting edge (145) for limiting the thrust bearing (15).

5. The rotary unloader capable of adjustment and measurement of the gap according to claim 3, characterized in that, The drive assembly also includes a limit sensor (18) fixedly connected to the outer wall of the protrusion (122). The limit sensor (18) is provided with a first limit adjustment post (181) and a second limit adjustment post (182) extending toward the pull rod bracket (17). The pull rod bracket (17) is disposed between the first limit adjustment post (181) and the second limit adjustment post (182).

6. The rotary unloader capable of adjustment and measurement of the gap according to claim 3, characterized in that, The rotating shaft (4) is also fitted with bushings (5) at positions corresponding to the two support brackets, which can rotate synchronously with the rotating shaft (4). A rolling bearing (6) is connected between the support bracket and the bushing (5).

7. The rotary unloader with adjustable and measurable gap according to claim 6, characterized in that, A sealing assembly is also connected at the connection position between the bushing (5) and the sealing housing (1). The sealing assembly includes a sealing packing (9) arranged circumferentially along the bushing (5) and a packing gland (8) pressed axially onto the sealing packing (9).

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