Search

CN-224204960-U - Adjustable permanent magnet damper

CN224204960UCN 224204960 UCN224204960 UCN 224204960UCN-224204960-U

Abstract

The application discloses an adjustable permanent magnet damper, which belongs to the technical field of permanent magnet brakes and comprises a shell, main shafts respectively fixed at two ends of the shell, main shafts rotatably connected in the shell and two end covers and penetrating through the two end covers, a magnetic part arranged in the shell and corresponding to the outer side of the main shafts and used for generating a magnetic field, a sliding sleeve axially moving in the shell, a magnetic sleeve fixedly arranged at the inner side of the sliding sleeve and positioned at one side outside a plurality of the magnetic parts, and an adjusting assembly arranged on the shell and the end covers and connected with the sliding sleeve and used for driving the sliding sleeve to move and adjusting the length of the magnetic sleeve covered at the outer side of the magnetic part. The adjustable permanent magnet damper changes the position of the sliding sleeve through the adjusting component, and further adjusts the length of the magnetic sleeve covered on the outer side of the magnetic piece, so that stepless adjustment from minimum damping moment to maximum damping moment can be realized, and various requirements on torque under different working conditions can be met.

Inventors

  • YUAN RONG

Assignees

  • 上海佐林电器有限公司

Dates

Publication Date
20260505
Application Date
20250507

Claims (10)

  1. 1. An adjustable permanent magnet damper comprises a shell (1), end covers (11) respectively fixed at two ends of the shell (1), and a main shaft (2) rotatably connected in the shell (1) and on the two end covers (11) and penetrating through the two end covers (11); The permanent magnet damper is characterized by further comprising a magnetic part (3) which is arranged in the shell (1) and corresponds to the outer side of the main shaft (2) and used for generating a magnetic field, a sliding sleeve (4) which axially moves in the shell (1), a magnetic sleeve (5) which is fixedly arranged on the inner side of the sliding sleeve (4) and is positioned on one side outside the magnetic parts (3), and an adjusting assembly (6) which is arranged on the shell (1) and the end cover (11) and is connected with the sliding sleeve (4) and used for driving the sliding sleeve (4) to move and adjusting the length of the magnetic sleeve (5) covered on the outer side of the magnetic part (3); The shell (1) is made of aluminum alloy materials, the main shaft (2) and the sliding sleeve (4) are made of stainless steel materials, the magnetic piece (3) is made of neodymium iron boron or samarium cobalt materials, the magnetic sleeve (5) is made of hysteresis materials, and the hysteresis materials are non-magnetized aluminum nickel cobalt or iron chromium cobalt materials or iron cobalt vanadium alloys.
  2. 2. The adjustable permanent magnet damper according to claim 1, wherein a magnetic air gap (7) is arranged between the magnetic sleeve (5) and the magnetic piece (3), the magnetic air gap (7) is 0.2-2 mm, the coercive force of the material used by the magnetic sleeve (5) is smaller than that of the material used by the magnetic piece (3), the thickness of the magnetic sleeve (5) is 1.0-5 mm, and the thickness of the magnetic piece (3) is 2-5 mm.
  3. 3. The adjustable permanent magnet damper according to claim 2, wherein the magnetic pieces (3) are a plurality of magnetic strips arranged in N-S separation or magnetic rings magnetized by radial multipoles.
  4. 4. The adjustable permanent magnet damper according to claim 1, wherein the adjusting assembly (6) comprises a screw rod (61) rotatably connected in the shell (1) and on the two end covers (11) and penetrating through the other end cover (11), and a driving piece (62) arranged outside the other end cover (11) and used for driving the screw rod (61) to rotate, and the screw rod (61) is in threaded connection with one side outside the sliding sleeve (4).
  5. 5. The adjustable permanent magnet damper according to claim 4, wherein the driving member (62) comprises nuts provided outside the two end caps (11) and fixedly connected to the ends of the screw (61).
  6. 6. The adjustable permanent magnet damper according to claim 4, wherein the sliding sleeve (4) and the shell (1) are provided with an indicating component (8) for indicating the adjusting length of the magnetic sleeve (5).
  7. 7. The adjustable permanent magnet damper according to claim 6, wherein the indicating assembly (8) comprises a pointer (81) penetrating through the shell (1) and fixedly connected with one side, far away from the screw rod (61), of the sliding sleeve (4), a through hole (82) formed in the shell (1) and corresponding to the position of the pointer (81), and scales arranged on one side of the through hole (82), and one end, far away from the sliding sleeve (4), of the pointer (81) is slidably connected in the through hole (82).
  8. 8. The adjustable permanent magnet damper according to claim 4, wherein the driving member (62) comprises a motor fixedly installed outside the two end caps (11) and fixedly connected to the end portions of the screw rods (61).
  9. 9. The adjustable permanent magnet damper according to claim 1, wherein the adjusting component (6) comprises a servo electric cylinder or an air cylinder fixedly arranged outside the other end cover (11), and a piston rod of the servo electric cylinder or the air cylinder is fixedly connected with one side outside the sliding sleeve (4).
  10. 10. The adjustable permanent magnet damper according to claim 1, wherein a plurality of the magnetic members (3) are fixedly arranged on the inner side of the sliding sleeve (4), and the magnetic sleeve (5) is fixedly arranged on the outer side of the main shaft (2).

Description

Adjustable permanent magnet damper Technical Field The application relates to the technical field of permanent magnet brakes, in particular to an adjustable permanent magnet damper. Background In many process industry fields, such as yarn manufacturing, wire processing, wire and cable production, stable operation of equipment and product quality control are highly dependent on accurate process parameter adjustment. The brake is used as a core execution unit and has the function of providing controllable and constant torque output so as to realize accurate control of key parameters such as the tension, the speed and the like of a processed object, under the working condition, the permanent magnet brake is often selected as a key source for the unreeling tension of the processed object by virtue of the unique advantages of the brake, and meanwhile, the requirement of constant torque load also promotes the permanent magnet brake to be an indispensable test device in test occasions such as motor test and the like. However, conventional axial flux brakes are common, in which a kinematic pair of a pair of relatively rotating magnetic material disks is used to control torque by adjusting the disk gap. However, when the torque is expected to be increased, the magnetic flux direction of the structure is axial, the dosage of axial magnetic materials is required to be increased, the magnetic materials which are positioned in the center of the shaft and extend outwards generate smaller torque at the center part, so that the material waste is caused, and the torque and the disc gap are in a direct proportion relationship, but the control is nonlinear, and the control is difficult to accurately grasp during adjustment, so that the control is uncontrollable; Another axial magnetic flux brake consisting of two fixed pairs and one rotating pair controls magnetic flux by adjusting the relative angle of the two fixed pair magnetic poles, thereby adjusting torque. However, although the torque is in direct proportion to the angle difference between the fixed pairs, the torque is also in nonlinear control, and the adjustment precision is difficult to ensure; In addition, when the traditional brake is adjusted, the traditional brake is often required to be adjusted by means of a tool or a measuring tool, is complex in operation, usually requires the cooperation of both hands of an operator, and even requires the cooperation of multiple persons to complete, so that the traditional brake is very inconvenient to use. Accordingly, the present application provides an adjustable permanent magnet damper to solve the above-mentioned problems. Disclosure of utility model The application provides an adjustable permanent magnet damper, which aims to solve the problems of uncontrollable adjustment, low adjustment precision, complex operation and the like caused by material waste and torque nonlinear control in the traditional axial magnetic flux brake in the prior art. In order to achieve the purpose, the application provides the following technical scheme that the adjustable permanent magnet damper comprises a shell, a main shaft and a main shaft, wherein the main shaft is respectively fixed at two ends of the shell, and the main shaft is rotatably connected in the shell and on two end covers and penetrates through the two end covers; The permanent magnet damper further comprises a magnetic part, a sliding sleeve, a magnetic sleeve and an adjusting assembly, wherein the magnetic part is arranged in the shell, corresponds to the outer side of the main shaft and is used for generating a magnetic field, the sliding sleeve axially moves in the shell, the magnetic sleeve is fixedly arranged on the inner side of the sliding sleeve and is positioned on one side of the outer sides of the magnetic parts, and the adjusting assembly is arranged on the shell and the end cover and is connected with the sliding sleeve and is used for driving the sliding sleeve to move and adjusting the length of the magnetic sleeve covered on the outer side of the magnetic part; The shell is made of aluminum alloy materials, the main shaft and the sliding sleeve are made of stainless steel materials, the magnetic piece is made of neodymium iron boron or samarium cobalt materials, the magnetic sleeve is made of hysteresis materials, and the hysteresis materials are non-magnetized aluminum nickel cobalt or iron chromium cobalt materials or iron cobalt vanadium alloys; the position of the sliding sleeve is changed through the adjusting component, the length of the magnetic sleeve covered on the outer side of the magnetic part is further adjusted, the axial covering lengths of the magnetic sleeve and the magnetic part are in direct proportion, so that stepless adjustment of the smallest to largest damping torque can be realized, various requirements on torque under different working conditions are met, meanwhile, the magnetic part adopts neodymium iron boron or samarium coba