Auxiliary braking device of electromagnetic brake

Abstract

The utility model discloses an auxiliary braking device of an electromagnetic brake, which relates to the technical field of electromagnetic brakes and comprises a brake component, an auxiliary braking component is fixedly connected outside the brake component, and the auxiliary braking component comprises a plurality of magnetic force variable fluid independent braking units. The magnetic force variable fluid independent braking unit comprises a magnetorheological fluid storage box, magnetorheological fluid is sealed in the magnetorheological fluid storage box, a telescopic rod set is connected to the interior of the magnetorheological fluid storage box, and the telescopic rod set comprises an inner push rod penetrating through the upper side wall and the lower side wall of the magnetorheological fluid storage box. Whether the stator of the brake assembly is damaged or not is detected according to the viscosity change of the magnetorheological fluid, if the stator is damaged, the magnetorheological fluid in the area is changed into Newtonian fluid with high fluidity from Bingham fluid with high viscosity, and then the position where the stator of the brake assembly is abnormal is judged through the extending inner push rod. And later maintenance of the stator is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic brakes, in particular to an electromagnetic brake auxiliary braking device. Background Technique

[0002] An electromagnetic brake is a frictionless auxiliary brake for a drilling rig. Using the principle of electromagnetic induction, direct current is passed into the stator coil of the electromagnetic brake to generate a constant magnetic field. When the winch lowers a heavy object, the rotor of the electromagnetic brake cuts the magnetic force lines of the stator magnetic field, thereby generating an induced electromotive force, eddy current, and braking torque. At this time, the driller can use the driller's switch to adjust the magnitude of the excitation current of the electromagnetic brake, so as to flexibly control the braking torque of the brake and the speed of lowering the drill pipe, and complete the entire drill pipe lowering operation without using the main brake. The electromagnetic brake has no friction, is easy to use, has little maintenance work, and still has a large braking torque at low speed, which is an ideal auxiliary brake for oil drilling rigs.

[0003] The authorized announcement number CN211670759U discloses an oil drilling electromagnetic brake based on DC chopper technology. Its main function is to adjust the stator coil to generate a constant magnetic field. When the winch lowers a heavy object, the rotor of the electromagnetic brake cuts the magnetic force lines of the stator magnetic field, thereby generating an induced electromotive force, eddy current, and braking torque. Subsequently, through braking, the operator only needs to control the magnitude of the voltage input to the coil by the magnetic potentiometer by controlling the deflection angle of the joystick, and can flexibly control the braking torque of the braking component and the speed of lowering the drill pipe.

[0004] However, due to the high temperature, high humidity, and multi-dust in the drilling environment, the stator of the electromagnetic brake may have poor heat dissipation, be affected by moisture, be worn by impurities, and may withstand overload operation and frequent high-intensity braking, resulting in damage to the stator of the electromagnetic brake. The stator is one of the important components for generating a constant magnetic field. If it is damaged, it will cause unstable braking, uneven wear, and brake jitter, and may even lead to brake failure or weakening, increase the braking distance, and cause danger. Based on the above viewpoints, those skilled in the art have provided an electromagnetic brake auxiliary braking device. Content of the Utility Model

[0005] The purpose of the utility model is to solve the defects existing in the prior art, and to propose an electromagnetic brake auxiliary braking device. The electromagnetic brake auxiliary braking device designed detects whether the stator of the brake braking component is damaged by the viscosity change of the magnetorheological fluid. If the stator is damaged, the magnetorheological fluid in this area changes from a Bingham fluid with a very high viscosity to a Newtonian fluid with stronger fluidity. Subsequently, the inner push rod that extends out is used to judge where the stator of the brake braking component is abnormal, which is convenient for the later repair of the stator.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An electromagnetic brake assist braking device, including a brake braking component, an auxiliary braking component is fixedly connected to the outside of the brake braking component, the auxiliary braking component includes a number of magnetic fluid variable independent braking units, the magnetic fluid variable independent braking unit includes a magnetorheological fluid storage tank, the magnetorheological fluid storage tank is sealed with magnetorheological fluid inside, a telescopic rod group is connected inside the magnetorheological fluid storage tank, the telescopic rod group includes an inner push rod penetrating through the upper and lower side walls of the magnetorheological fluid storage tank, a dividing pressure plate is fixedly connected to the outer side wall of the inner push rod, through holes for providing the flow of magnetorheological fluid are opened on the dividing pressure plate, a strong spring for connecting the dividing pressure plate and the magnetorheological fluid storage tank is fixedly connected to the top of the dividing pressure plate, and a sealing structure for preventing the magnetorheological fluid from overflowing is arranged at the contact part of the magnetorheological fluid storage tank and the inner push rod;

[0008] Through the above technical solution, when a part of the stator in the auxiliary braking component is damaged, it will cause the loss of magnetic force in that part, and then cause the magnetorheological fluid in that part to change from a Bingham fluid with high viscosity to a Newtonian fluid with stronger fluidity, and then cause the dividing pressure plate and the inner push rod to be pushed upward by the strong spring. After the driver detects the relevant abnormalities of the electromagnetic brake, the driver can judge where the stator of the brake braking component is abnormal through the protruding inner push rod, which is convenient for the later repair of the stator.

[0009] Furthermore, a fixing frame is fixedly connected to the outer side wall of the magnetorheological fluid storage tank, a number of support spring rods distributed in a circumferential array are fixedly connected to the lower end surface of the upper side wall of the fixing frame, and a total connection plate is fixedly connected to the lower side walls of the number of support spring rods, and the total connection plates of a number of magnetic fluid variable independent braking units are fixedly connected;

[0010] Through the above technical solution, the total connection plate is supported by a number of support spring rods at the same time. When a small number of inner push rods protrude, since the elastic force of a small number of strong springs is lower than the elastic force of a number of support spring rods, the total connection plate will not be driven to move upward. However, if a large number of inner push rods protrude, since the elastic force of a large number of strong springs is greater than the elastic force of a number of support spring rods of the magnetic fluid variable independent braking unit, the total connection plate is driven to rise at this time.

[0011] Furthermore, an installation frame is fixedly connected to the lower section of the upper side wall of the magnetorheological fluid storage tank and close to the inner side, an emergency stop rod is connected inside the installation frame through a torsion spring, a toothed plate is fixedly connected to the inner side wall of the total connection plate, and a gear meshing with the toothed plate is arranged at the bottom of the installation frame;

[0012] Through the above technical solution, when the total connection plate rises, the toothed plate will drive the emergency stop rod to rotate together, and the equipment is blocked by the emergency stop rod, so as to realize the emergency braking of the equipment, effectively preventing the occurrence of safety accidents in the case of stator damage in the brake braking component.

[0013] Furthermore, a buzzer is installed at the center position of the bottom of the total connection plate;

[0014] Through the above technical solution, when the inner push rod rises, it will first contact the buzzer, so that the buzzer is triggered to alarm, thereby reminding the driver that the brake braking component may be damaged and helping the driver avoid risks earlier.

[0015] Furthermore, the bottoms of several of the inner push rods are fixedly connected with bottom connection hanging rings, and an elastic cord is tied to each bottom connection hanging ring, and the bottom of the elastic cord is fixedly connected with a reset plate;

[0016] Through the above technical solution, the overall reset of the telescopic rod group can be achieved by pulling down the reset plate.

[0017] The utility model has the following beneficial effects:

[0018] 1. In the utility model, the viscosity change of the magnetorheological fluid is used to detect whether the stator of the brake braking component is damaged. If the stator is damaged, the magnetorheological fluid in this area changes from a Bingham fluid with a very high viscosity to a Newtonian fluid with stronger fluidity. Subsequently, the position where the stator of the brake braking component is abnormal is judged by the extended inner push rod, which is convenient for the later repair of the stator.

[0019] 2. In the utility model, the total connection plate is supported by several support spring rods at the same time. When a few inner push rods extend, since the elastic force of a few strong springs is lower than the elastic force of several support spring rods, the total connection plate will not be driven to move upward. However, if most of the inner push rods extend, since the elastic force of most strong springs is greater than the elastic force of several support spring rods of the magnetorheological fluid independent braking unit, the total connection plate is driven to rise at this time, and the toothed plate will drive the emergency stop rod to rotate together, and the equipment is blocked by the emergency stop rod, thereby realizing the emergency braking of the equipment, effectively preventing the occurrence of safety accidents in the case of stator damage in the brake braking component.

[0020] 3. In the utility model, when the inner push rod rises, it will first contact the buzzer, so that the buzzer is triggered to alarm, thereby reminding the driver that the brake braking component may be damaged and helping the driver avoid risks earlier. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall view of an electromagnetic brake auxiliary braking device proposed by the utility model;

[0022] Figure 2 is the front view of an electromagnetic brake auxiliary braking device proposed by the utility model;

[0023] Figure 3 is Figure 2 the isometric side sectional view along A-A in

[0024] Figure 4 Schematic diagram of the magnetic fluid variable independent braking unit in an electromagnetic brake assisted braking device proposed by the present utility model;

[0025] Figure 5 Isometric side sectional view of the magnetic fluid variable independent braking unit in an electromagnetic brake assisted braking device proposed by the present utility model;

[0026] Figure 6 Top view of an electromagnetic brake assisted braking device proposed by the present utility model;

[0027] Figure 7 is Figure 6 Isometric side sectional view along B-B in

[0028] Legend:

[0029] 1. Brake braking component; 2. Auxiliary braking component; 3. Magnetic fluid variable independent braking unit;

[0030] 31. Magnetorheological fluid storage tank; 32. Fixed frame; 33. Telescopic rod group; 34. Total connection plate; 35. Support spring rod; 36. Tooth plate; 37. Mounting frame; 38. Emergency stop rod; 39. Emergency stop rod; 310. Reset plate; 311. Elastic cord;

[0031] 331. Inner push rod; 332. Sub-pressure plate; 333. Strong spring; 334. Bottom connection hanging ring. Specific implementation manners

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] Embodiment: Refer to Figures 1-7, an embodiment provided by the present utility model, an electromagnetic brake auxiliary braking device, includes a brake braking assembly 1. An auxiliary braking assembly 2 is fixedly connected to the outside of the brake braking assembly 1. The auxiliary braking assembly 2 includes a number of magnetic fluid variable independent braking units 3. The magnetic fluid variable independent braking unit 3 includes a magnetorheological fluid storage tank 31. The magnetorheological fluid storage tank 31 is sealed with magnetorheological fluid inside. An expansion rod group 33 is connected inside the magnetorheological fluid storage tank 31. The expansion rod group 33 includes an inner push rod 331 penetrating through the upper and lower side walls of the magnetorheological fluid storage tank 31. A dividing pressure plate 332 is fixedly connected to the outer side wall of the inner push rod 331. Through holes for providing the flow of magnetorheological fluid are formed on the dividing pressure plate 332. A strong spring 333 for connecting the dividing pressure plate 332 and the magnetorheological fluid storage tank 31 is fixedly connected to the top of the dividing pressure plate 332. A sealing structure for preventing the magnetorheological fluid from overflowing is provided at the contact part between the magnetorheological fluid storage tank 31 and the inner push rod 331. When a part of the stator in the auxiliary braking assembly 2 is damaged, it will cause the loss of magnetic force in that part, and then cause the magnetorheological fluid in that part to change from a Bingham fluid with a very high viscosity (a Bingham fluid is a fluid that starts to undergo shear deformation only when the shear stress reaches a certain yield stress, and the deformation rate and shear stress are linearly related. When the shear stress is below the yield stress, the fluid behaves like a solid and does not flow. Only when the applied external force exceeds the yield stress does the fluid start to flow) to a Newtonian fluid with stronger fluidity, and then cause the dividing pressure plate 332 and the inner push rod 331 to be pushed upward by the strong spring 333. After detecting the relevant abnormalities of the electromagnetic brake, the driver can judge where the stator of the brake braking assembly 1 is abnormal through the protruding inner push rod 331, which is convenient for the later maintenance of the stator. A buzzer 39 is installed at the center position of the bottom of the total connection plate 34. When the inner push rod 331 rises, it will first contact the buzzer 39, so that the buzzer 39 is triggered to alarm, and then remind the driver that the brake braking assembly 1 may be damaged, helping the driver to avoid risks in advance.

[0034] The outer wall of the magnetorheological fluid storage box 31 is fixedly connected with a fixing frame 32, and the lower end surface of the upper side wall of the fixing frame 32 is fixedly connected with a plurality of supporting spring rods 35 distributed in a circumferential array, and the lower side walls of the plurality of supporting spring rods 35 are fixedly connected with a general connecting plate 34, and the general connecting plates 34 of the plurality of magnetorheological fluid independent brake units 3 are fixedly connected, and the general connecting plate 34 is supported by the plurality of supporting spring rods 35 at the same time. When a few inner push rods 331 are extended, since the elastic force of a few strong springs 333 is lower than the elastic force of the plurality of supporting spring rods 35, the general connecting plate 34 will not be driven to move upward. However, if most of the inner push rods 331 are extended, since the elastic force of most of the strong springs 333 is greater than the elastic force of the plurality of supporting spring rods 35 of the magnetorheological fluid independent brake unit 3, the general connecting plate 34 will be driven to rise, and the magnetorheological fluid storage box 31 A mounting bracket 37 is fixedly connected to the lower section of the upper side wall and near the inner side. The interior of the mounting bracket 37 is connected to an emergency stop rod 38 through a torsion spring. A toothed plate 36 is fixedly connected to the inner wall of the total connecting plate 34. A gear meshing with the toothed plate 36 is provided at the bottom of the mounting bracket 37. When the total connecting plate 34 rises, the toothed plate 36 will drive the emergency stop rod 38 to rotate together, and the emergency stop rod 38 will resist the equipment, thereby achieving emergency braking of the equipment, effectively preventing the occurrence of safety accidents when the stator in the brake assembly 1 is damaged. A bottom connecting ring 334 is fixedly connected to the bottom of several inner push rods 331, and each bottom connecting ring 334 is tied with an elastic rope 311. The bottom of the elastic rope 311 is fixedly connected to a reset plate 310, and the telescopic rod group 33 can be reset as a whole by pulling down the reset plate 310.

[0035] Working principle: When the stator in the auxiliary brake assembly 2 is partially damaged, the magnetic force of that part will be lost, and then the magnetorheological fluid of that part will change from a Bingham fluid with high viscosity to a Newtonian fluid with strong fluidity, so that the pressure dividing plate 332 and the inner push rod 331 are pushed upward by the strong spring 333. After the driver detects the relevant abnormality of the electromagnetic brake, he can judge where the stator of the brake assembly 1 is abnormal through the extended inner push rod 331, which is convenient for the later maintenance of the stator. When the inner push rod 331 rises, it will first contact the buzzer 39, so that the buzzer 39 is triggered to alarm, thereby reminding the driver that the brake assembly 1 may be damaged, helping the driver to avoid risks in advance. The main connecting plate 34 is supported by several supporting spring rods 35 at the same time. When a few inner push rods 331 are extended, the main connecting plate 34 will not be driven to move upward because the elastic force of a few strong springs 333 is lower than the elastic force of several supporting spring rods 35. However, if most of the inner push rods 331 are extended, the elastic force of most of the strong springs 333 is greater than the elastic force of several supporting spring rods 35 of the magnetic variable fluid independent brake unit 3. At this time, the main connecting plate 34 is driven to rise. When the main connecting plate 34 rises, the tooth plate 36 will drive the emergency stop rod 38 to rotate together, and the emergency stop rod 38 will be used to resist the equipment, thereby realizing emergency braking of the equipment, effectively preventing the occurrence of safety accidents when the stator in the brake assembly 1 is damaged.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electromagnetic brake assisted braking device, comprising a brake braking assembly (1), characterized in that: An auxiliary braking assembly (2) is fixedly connected to the outside of the braking assembly (1). The auxiliary braking assembly (2) includes a number of magnetorheological fluid independent braking units (3). The magnetorheological fluid independent braking unit (3) includes a magnetorheological fluid storage tank (31). Magnetorheological fluid is sealed inside the magnetorheological fluid storage tank (31). A telescopic rod group (33) is connected inside the magnetorheological fluid storage tank (31). The telescopic rod group (33) includes an inner push rod (331) passing through the upper and lower side walls of the magnetorheological fluid storage tank (31). A dividing pressure plate (332) is fixedly connected to the outer side wall of the inner push rod (331). Through holes for providing the flow of magnetorheological fluid are formed in the dividing pressure plate (332). A strong spring (333) for connecting the dividing pressure plate (332) and the magnetorheological fluid storage tank (31) is fixedly connected to the top of the dividing pressure plate (332). A sealing structure for preventing the magnetorheological fluid from overflowing is provided at the contact part between the magnetorheological fluid storage tank (31) and the inner push rod (331).

2. The electromagnetic brake-assisted braking device according to claim 1, wherein: A fixing frame (32) is fixedly connected to the outer side wall of the magnetorheological fluid storage tank (31). A number of support spring rods (35) distributed in a circular array are fixedly connected to the lower end face of the upper side wall of the fixing frame (32). A total connection plate (34) is fixedly connected to the lower side walls of the number of support spring rods (35). The total connection plates (34) of the number of magnetorheological fluid independent braking units (3) are fixedly connected.

3. An electromagnetic brake assisted braking device according to claim 2, characterized in that: An installation frame (37) is fixedly connected to the lower section of the upper side wall of the magnetorheological fluid storage tank (31) and near the inner side. An emergency stop rod (38) is connected inside the installation frame (37) through a torsion spring. A toothed plate (36) is fixedly connected to the inner side wall of the total connection plate (34). A gear meshing with the toothed plate (36) is provided at the bottom of the installation frame (37).

4. An electromagnetic brake assisted braking device according to claim 2, characterized in that: A buzzer (39) is installed at the center position of the bottom of the total connection plate (34).

5. An electromagnetic brake assisted braking device according to claim 4, characterized in that: Bottom connection hanging rings (334) are fixedly connected to the bottoms of the number of inner push rods (331). An elastic cord (311) is tied to each bottom connection hanging ring (334). A reset plate (310) is fixedly connected to the bottom of the elastic cord (311).

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