CN111520423B - Heterogeneous brake disc for mine high-speed hoist - Google Patents
Heterogeneous brake disc for mine high-speed hoist Download PDFInfo
- Publication number
- CN111520423B CN111520423B CN202010389838.XA CN202010389838A CN111520423B CN 111520423 B CN111520423 B CN 111520423B CN 202010389838 A CN202010389838 A CN 202010389838A CN 111520423 B CN111520423 B CN 111520423B
- Authority
- CN
- China
- Prior art keywords
- thermal
- coating
- conductivity
- heat
- brake disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/127—Discs; Drums for disc brakes characterised by properties of the disc surface; Discs lined with friction material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/12—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect
- B66D5/14—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect embodying discs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Cage And Drive Apparatuses For Elevators (AREA)
Abstract
The invention discloses a heterogeneous brake disc for a mine high-speed hoist, which comprises a steel substrate layer, wherein a thermal barrier thermal insulation coating is arranged on the surface of the steel substrate layer, and an anisotropic high-thermal-conductivity coating is arranged on the surface of the thermal barrier thermal insulation coating. Wherein, the radial thermal conductivity of the anisotropic high thermal conductivity coating is larger than the thermal conductivity in the circumferential direction and the depth direction. The heat conductivity coefficient of the substrate layer is larger than that of the thermal barrier heat-insulating coating. The specific heat capacity coefficient of the thermal barrier heat-insulating coating is larger than that of the matrix layer and the anisotropic high-thermal-conductivity coating. The thermal expansion coefficient of the substrate layer is larger than that of the thermal barrier heat-insulating coating and the anisotropic high-thermal-conductivity coating. The invention can improve the temperature distribution and thermal deformation of the brake disc in the high-speed braking process, thereby improving the braking safety of the high-speed hoister.
Description
Technical Field
The invention relates to the technical field of high-speed hoists of mining machinery, in particular to a self-adaptive control method for thermal deformation of a heterogeneous brake disc.
Background
The mine hoist is mainly used for lifting and lowering personnel, materials, equipment and the like of coal mines, metal mines and nonmetal mines, and is an important transportation tool for connecting the upper part of a well and the lower part of the well. The disc brake is used as a key component of a safety brake system of the mine hoist, the working reliability of the disc brake is directly related to the safety performance of the mine hoist, the safety production of a mine is influenced, once the disc brake fails, the production progress is influenced slightly, and a malignant accident is caused seriously. Deep mine mining is the mainstream direction of coal mine development, and in order to improve efficiency, deep well lifting generally adopts large-tonnage and high-speed lifting; meanwhile, as the working condition becomes complicated, the number of times of emergency braking is increased. The brake disc is one of the key brake components for ensuring the safe operation of the mine hoist. In the process of emergency braking of the deep well hoist disc brake, a brake shoe is in contact with a brake disc rotating at a high speed, and the hoist is decelerated until the hoist stops through the friction action. In the whole emergency braking process, because the initial braking speed and the braking pressure are high, the braking time is extremely short, and a large amount of heat is generated by the intense friction between the brake disc and the brake shoe, so that the temperature of the brake disc and the brake shoe is rapidly increased. The temperature of the surface of the brake disc is not higher in the middle and lower on two sides, but shows a non-uniform distribution rule. The brake shoe is unevenly contacted with a rotating brake disc, uneven contact pressure can cause the temperature field change of the surface of the brake disc to show the uneven change tendency, and local temperature of the surface of the brake disc is too high, so-called 'hot spots' are formed, and the braking performance is influenced. In addition, the heat and the thermal stress generated during braking can lead to the non-uniform deformation of the brake disc, the service life is reduced, and the potential safety hazard is caused.
Therefore, in order to solve the problem of thermal deformation in the braking process of the brake disc of the high-speed elevator, an effective method is urgently needed to be found to improve the braking safety of the high-speed elevator.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the problem of thermal deformation in the braking process of the brake disc of the conventional high-speed elevator, a self-adaptive control method for improving the thermal deformation in the braking process of the brake disc of the high-speed elevator by using a heterogeneous coating is provided.
The technical scheme is as follows: a heterogeneous brake disc for a mine high-speed hoist comprises a steel substrate layer, wherein a thermal barrier thermal insulation coating is arranged on the surface of the steel substrate layer, and an anisotropic high-thermal-conductivity coating is arranged on the surface of the thermal barrier thermal insulation coating; wherein the radial thermal conductivity of the anisotropic high thermal conductivity coating is greater than the thermal conductivity in the circumferential and depth directions; the heat conductivity coefficient of the substrate layer is larger than that of the thermal barrier heat-insulating coating; the specific heat capacity coefficient of the thermal barrier heat-insulating coating is larger than that of the substrate layer and the anisotropic high-thermal-conductivity coating; the thermal expansion coefficient of the substrate layer is larger than that of the thermal barrier heat-insulating coating and the anisotropic high-thermal-conductivity coating.
Further, the radial thermal conductivity of the anisotropic high thermal conductivity coating is more than 150W/(m.K), and the thermal conductivity in the circumferential direction and the depth direction is less than 60W/(m.K); the thermal conductivity coefficient of the thermal barrier heat-insulating coating is less than 45W/(m.K), and the thermal conductivity coefficient of the substrate layer is 45-60W/(m.K).
Further, the specific heat capacity coefficient of the thermal barrier heat-insulating coating is greater than 750J/(kg.K), and the specific heat capacity coefficients of the substrate layer and the anisotropic high thermal conductive coating are both less than 550J/(kg.K).
The coefficient of thermal expansion of the substrate layer is greater than 10 x 10-6The thermal expansion coefficient of the thermal barrier heat-insulating coating is 5 multiplied by 10-6/K～10×10-6The thermal expansion coefficient of the anisotropic high thermal conductive coating is less than 4 multiplied by 10-6/K。
Has the advantages that: (1) the brake surface of the invention is provided with the anisotropic high-heat-conduction coating, the coating can transfer the heat of a friction area along the radius direction at a high speed, and the temperature gradient and the temperature difference of each area of the brake surface are reduced, so that the surface layer of the brake disc has uniform deformation.
(2) The thermal barrier heat-insulating coating has high specific heat, can prevent the heat of the surface layer from being transferred to the substrate layer, and simultaneously enables the surface layer to have more uniform temperature distribution.
(3) The deformation of the inner layer and the outer layer of the brake can be coordinated by the high-temperature distribution and the low thermal expansion coefficient of the surface layer and the thermal barrier heat-insulating coating, so that the brake can be adaptive to the braking requirement of the high-speed elevator, and the braking safety of the high-speed elevator is improved.
Drawings
FIG. 1 is a sectional view of a non-homogeneous brake disk profile of the present invention
FIG. 2 is a schematic view of the heterogeneous brake disc of the present invention layered along the D-D cross-section.
Detailed Description
The invention is further explained below with reference to the drawings.
A main body of the heterogeneous brake disc for a mine high-speed hoist is a steel substrate layer 3, a thermal barrier thermal insulation coating 2 is arranged on the surface of the steel substrate layer 3, and an anisotropic high thermal conductivity coating 1 is arranged on the surface of the thermal barrier thermal insulation coating 2. Wherein, the radial thermal conductivity of the anisotropic high thermal conductivity coating 1 is larger than the thermal conductivity in the circumferential and depth directions. The heat conductivity coefficient of the substrate layer 3 is larger than that of the thermal barrier heat-insulating coating 2. The specific heat capacity coefficient of the thermal barrier heat-insulating coating 2 is larger than that of the base layer 3 and the anisotropic high-thermal-conductivity coating 1. The thermal expansion coefficient of the substrate layer 3 is larger than that of the thermal barrier heat-insulating coating 2 and the anisotropic high-thermal-conductivity coating 1.
Specifically, the anisotropic high thermal conductivity coating 1 has a radial thermal conductivity of more than 150W/(m · K), and a thermal conductivity of less than 60W/(m · K) in both the circumferential direction and the depth direction. The thermal conductivity of the thermal barrier thermal insulation coating 2 is less than 45W/(m.K), and the thermal conductivity of the substrate layer 3 is 45-60W/(m.K). The specific heat capacity coefficient of the thermal barrier heat-insulating coating 2 is more than 750J/(kg.K),the specific heat capacity coefficients of the substrate layer 3 and the anisotropic high thermal conductivity coating layer 1 are both less than 550J/(kg.K). The coefficient of thermal expansion of the substrate layer 3 is greater than 10 x 10-6K, the thermal expansion coefficient of the thermal barrier heat-insulating coating 2 is 5 multiplied by 10-6/K～10×10-6K, the thermal expansion coefficient of the anisotropic high thermal conductivity coating 1 is less than 4 x 10-6/K。
The invention can improve the temperature distribution and thermal deformation of the brake disc in the high-speed braking process, thereby improving the braking safety of the high-speed hoister. The self-adaptive control principle of the thermal deformation of the heterogeneous brake disc is as follows: as shown in fig. 2, the non-homogeneous brake disc has 1, 2 and 3 layers from the surface to the inside, which are respectively an anisotropic high thermal conductivity coating 1, a thermal barrier insulation coating 2 and a substrate layer 3. As shown in FIG. 1, the surface layer A1 of the area A is a high temperature area which is contacted with the brake shoe, rubs and generates heat, the surface layer B1 of the area B is a low temperature area which is not contacted with the brake shoe, and the surface layer C1 of the area C is a middle temperature area which is rubbed and radiated with the brake shoe at any point of braking. During braking of a high-speed elevator, a great amount of friction heat is generated in the area A1 due to friction, so that the temperature of the area A1 is increased, and the radial heat conductivity coefficient of the anisotropic high-heat-conductivity coating 1 is larger than the heat conductivity coefficients in the circumferential direction and the depth direction, so that the heat in the area A1 can be rapidly transferred to the area B1, and the temperature difference between the area A1 and the area B1 is reduced.
Because 2 layers have the characteristic of large specific heat capacity, the temperature of the 2 layers caused by heat transfer of the 1 layer can be kept relatively constant, namely the temperature difference of the A2, B2 and C2 regions is small; meanwhile, the heat in the C2 area is transferred to the C1 area, so that the heat loss of a part of the C1 area is counteracted, the C1 area cannot cause large temperature reduction, and finally, the temperature difference of the A1 area, the B1 area and the C1 area is reduced. Since 2 layers have a large specific heat capacity, 1 layer transfers less heat to 3 layers, with 3 layers being the lowest in temperature.
In conclusion, due to the anisotropic high thermal conductivity of the 1 layer and the heat transfer from the C2 region to the C1 region, the temperature difference of the A1, B1 and C1 regions is small; due to the thermal barrier effect of the large specific heat of the 2 layers, the temperature of the 1 layer and the 2 layers is greatly higher than that of the 3 layers. Since the thermal expansion coefficients of the 1 and 2 layers are smaller than that of the 3 layers, deformation in conformity with the 3 layers can be obtained although the temperatures of the 1 and 2 layers are high. Therefore, the deformation of the brake disc in the braking process of the high-speed elevator can be finally reduced by coordinating the temperature distribution and the thermal expansion coefficients of the 1, 2 and 3 layers, and the self-adaptive control of the thermal deformation of the non-homogeneous brake disc of the high-speed elevator is realized. The anisotropic high thermal conductivity coating 1 of the heterogeneous brake disc can be prepared by using a fiber material and adopting a coating preparation technology according to performance indexes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The heterogeneous brake disc for the mine high-speed hoist is characterized by comprising a steel substrate layer (3), wherein a thermal barrier thermal insulation coating (2) is arranged on the surface of the steel substrate layer (3), and an anisotropic high-thermal-conductivity coating (1) is arranged on the surface of the thermal barrier thermal insulation coating (2); wherein the radial thermal conductivity of the anisotropic high thermal conductivity coating (1) is greater than the thermal conductivity in the circumferential and depth directions; the heat conductivity coefficient of the substrate layer (3) is greater than that of the thermal barrier heat-insulating coating (2); the specific heat capacity coefficient of the thermal barrier heat-insulating coating (2) is larger than that of the substrate layer (3) and the anisotropic high heat-conducting coating (1); the thermal expansion coefficient of the substrate layer (3) is larger than that of the thermal barrier heat-insulating coating (2) and the anisotropic high-thermal-conductivity coating (1); the radial thermal conductivity of the anisotropic high thermal conductivity coating (1) is more than 150W/(m.K), and the thermal conductivity in the circumferential direction and the depth direction is less than 60W/(m.K).
2. The heterogeneous brake disc for the mine high-speed hoist according to claim 1, wherein the thermal conductivity of the thermal barrier insulation coating (2) is less than 45W/(m-K), and the thermal conductivity of the matrix layer (3) is 45-60W/(m-K).
3. Heterogeneous brake disc for mine high-speed elevators according to claim 1, characterized in that the thermal barrier insulation coating (2) has a specific heat capacity coefficient greater than 750J/(kg-K), and the matrix layer (3) and the anisotropic high thermal conductivity coating (1) each have a specific heat capacity coefficient less than 550J/(kg-K).
4. Heterogeneous brake disc for mine high-speed elevators according to claim 1, characterized in that the base layer (3) has a coefficient of thermal expansion greater than 10 x 10-6The thermal expansion coefficient of the thermal barrier heat-insulating coating (2) is 5 multiplied by 10-6/K～10×10-6K, the coefficient of thermal expansion of the anisotropic high thermal conductivity coating (1) is less than 4 x 10-6/K。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010389838.XA CN111520423B (en) | 2020-05-11 | 2020-05-11 | Heterogeneous brake disc for mine high-speed hoist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010389838.XA CN111520423B (en) | 2020-05-11 | 2020-05-11 | Heterogeneous brake disc for mine high-speed hoist |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111520423A CN111520423A (en) | 2020-08-11 |
| CN111520423B true CN111520423B (en) | 2021-03-16 |
Family
ID=71907782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010389838.XA Active CN111520423B (en) | 2020-05-11 | 2020-05-11 | Heterogeneous brake disc for mine high-speed hoist |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111520423B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5407035A (en) * | 1992-07-07 | 1995-04-18 | Ford Motor Company | Composite disk brake rotor and method of making |
| US5901818A (en) * | 1995-05-16 | 1999-05-11 | Martino; Gerald | Brake rotors with heat-resistant ceramic coatings |
| CN1396430A (en) * | 2001-07-16 | 2003-02-12 | 中国科学院理化技术研究所 | Composite section with anisotropic heat conductivity |
| DE102004016096A1 (en) * | 2004-04-01 | 2005-10-20 | Volkswagen Ag | Brake disk for road vehicle has at least one intermediate layer and/or other layers with a coating giving increased thermal conductivity |
| CN102471860A (en) * | 2009-07-02 | 2012-05-23 | 斯奈克玛 | Heat-protective coating for a turbine engine part, and method for producing same |
| CN103328410A (en) * | 2010-12-28 | 2013-09-25 | 西格里碳素欧洲公司 | Friction discs having a structured ceramic friction layer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63111331A (en) * | 1986-10-28 | 1988-05-16 | Toyota Motor Corp | Disc rotor |
| JP2009063072A (en) * | 2007-09-06 | 2009-03-26 | Railway Technical Res Inst | Brake disc, method for surface modification thereof, and surface modification device for brake disc |
-
2020
- 2020-05-11 CN CN202010389838.XA patent/CN111520423B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5407035A (en) * | 1992-07-07 | 1995-04-18 | Ford Motor Company | Composite disk brake rotor and method of making |
| US5901818A (en) * | 1995-05-16 | 1999-05-11 | Martino; Gerald | Brake rotors with heat-resistant ceramic coatings |
| CN1396430A (en) * | 2001-07-16 | 2003-02-12 | 中国科学院理化技术研究所 | Composite section with anisotropic heat conductivity |
| DE102004016096A1 (en) * | 2004-04-01 | 2005-10-20 | Volkswagen Ag | Brake disk for road vehicle has at least one intermediate layer and/or other layers with a coating giving increased thermal conductivity |
| CN102471860A (en) * | 2009-07-02 | 2012-05-23 | 斯奈克玛 | Heat-protective coating for a turbine engine part, and method for producing same |
| CN103328410A (en) * | 2010-12-28 | 2013-09-25 | 西格里碳素欧洲公司 | Friction discs having a structured ceramic friction layer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111520423A (en) | 2020-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20070062777A1 (en) | Friction plates and reaction plates for friction clutches and brakes with reduced thermal stresses | |
| CN111520423B (en) | Heterogeneous brake disc for mine high-speed hoist | |
| CN103880461B (en) | The preparation method of bullet train carbon/ceramic composite material friction pair | |
| JPH11209025A (en) | Safety elevator brake | |
| EP0482210B1 (en) | Friction pad for disc brake of vehicle | |
| US20130240304A1 (en) | Low conductivity brake pad | |
| CN107420467A (en) | Brake piston and piston nose | |
| US7938236B2 (en) | Composite article | |
| US20220356122A1 (en) | High temperature oxidation protection for composites | |
| US3892293A (en) | Disc brakes | |
| US20020166739A1 (en) | Brake assembly cooling | |
| CN104681196B (en) | A kind of power cable be applied to hot environment | |
| CN104246281A (en) | Mating surface of friction pairing | |
| CN104517682B (en) | A kind of aluminium alloy cable Equipment for Heating Processing | |
| US8109850B2 (en) | Drive pulley for elevators and method of manufacture thereof | |
| CN212899471U (en) | Brake assembly capable of improving braking torque | |
| US20120299248A1 (en) | Shaft sealing ring for a barrier oil sealing system of a hydrogen-cooled generator | |
| CN211445793U (en) | Arrangement and installation structure of temperature measurement optical fibers in blast furnace | |
| Padmanabhan et al. | Investigation of structural and thermal analysis of clutch facings with different friction materials | |
| US7513342B2 (en) | Brake mechanism for a vehicle, in particular for a motor vehicle | |
| CN212375383U (en) | Heterogeneous brake disc preparation facilities for mine high-speed elevator | |
| CN210423527U (en) | Cast iron ceramic composite brake disc | |
| CN213454964U (en) | Heat preservation and insulation structure of vacuum sintering furnace | |
| CN209721327U (en) | Coal mine auxiliary shaft friction hoisting device | |
| EP4253784A1 (en) | Wheel and brake assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |