IP65 brake resistor
The sealed package and multi-layer package structure of the IP65 brake resistor solves the problem of insulation layer wear caused by vibration of the brake resistor, and achieves stable operation and high waterproof performance in harsh environments.
Patent Information
- Application Number
- CN202422043644.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-08-22
AI Technical Summary
In the wind power industry, existing brake resistors suffer from porcelain tube wear due to vibration, resulting in insulation damage and casing short circuit, affecting the normal operation of the equipment.
The IP65 brake resistor is sealed with a resistor shell and packaging components, and a magnesium oxide filling layer is used to dissipate heat. The resistor body is fixed by high-temperature baked sealing sand and silicone gel. Combined with a multi-layer packaging structure, it improves impact resistance and waterproof performance.
It improves the impact resistance and vibration resistance of the resistor, prevents short circuits caused by insulation wear, meets IP65 waterproof performance, and ensures stable operation of the equipment in harsh environments.
Smart Images
Figure CN223362908U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of resistors, in particular to an IP65 braking resistor. Background Art
[0002] Inverter braking resistors can be used in the circuits where the inverter controls motor deceleration and braking. Usually, external resistors can consume excess energy from the motor and load to protect the inverter's overvoltage protection. They are widely used in industrial systems that use inverters.
[0003] The internal structure of the brake resistors currently used in the variable pitch cabinets in the wind power industry is a porcelain tube structure. After the wind turbine is started, the hub will vibrate. The vibration of the brake resistor with a porcelain tube structure will cause the insulation layer between the porcelain tube and the outer casing to be worn out, resulting in a short circuit to the ground with the outer casing, causing the wind turbine to malfunction. Utility Model Content
[0004] In view of the defects in the prior art, the purpose of the present invention is to provide an IP65 brake resistor with good sealing and waterproof effects, which can prevent the resistor from vibrating and causing damage and short circuit.
[0005] The technical solution adopted by the utility model is: an IP65 brake resistor, including a resistor shell and a packaging component; a resistor body is encapsulated in the resistor shell, and the resistor shell forms a front seal and a rear seal corresponding to the front and rear ends of the resistor body, an isolation pad is provided on the surface of the resistor body to form a heat dissipation space between the surface of the resistor body and the inner wall of the resistor shell, and a magnesium oxide filling layer is provided in the heat dissipation space; the packaging component includes a baffle, a silicone layer and a porcelain piece located at the front seal and the rear seal and arranged from the inside to the outside, a sealing sand is further provided between the silicone layer and the porcelain piece, and the sealing sand is baked at high temperature to seal and fix the front and rear ends of the resistor body.
[0006] In this technical solution, the resistor shell and packaging assembly can seal the resistor body, which improves the impact resistance and vibration resistance of the resistor after packaging, and is conducive to ensuring the electrical performance of the resistor; the magnesium oxide filling layer filled in the resistor shell is used to fully dissipate the heat generated by the resistor body when the resistor is working; the sealing sand used for sealing is baked at high temperature, and at the same time, the silica gel solidifies and connects with the sealing sand by absorbing moisture in the air, thereby solidifying into a block to fix the resistor body. In the case of vibration, the insulating layer will not be worn, resulting in a short circuit to the ground with the shell, which is conducive to improving safety. The IP65 level waterproof performance meets the needs of customers in harsh environments.
[0007] Preferably, the isolation pad is centrally arranged on the surface of the resistor body.
[0008] Preferably, the magnesium oxide filling layer is placed in the heat dissipation space and then vibrates to enrich the heat dissipation space.
[0009] Preferably, the ceramic component of the packaging assembly is fixed to the front seal and the rear seal of the resistor shell by means of mold crimping.
[0010] Preferably, the resistor body includes a plurality of mica skeletons, the mica skeletons are wound with resistance wires, the resistance wires are connected to conductive sheets, and mica isolation plates are provided between adjacent mica skeletons.
[0011] Preferably, the conductive sheet is connected to a high-temperature resistant power line passing through the front seal.
[0012] The beneficial effects of the utility model are as follows: the utility model seals and packages the resistor body through the resistor shell and the packaging component, and after packaging, the impact resistance and vibration resistance of the resistor are improved, which is beneficial to ensuring the electrical performance of the resistor; the magnesium oxide filling layer filled in the resistor shell is used to fully dissipate the heat generated by the resistor body when the resistor is working; the sealing sand used for sealing is baked at high temperature and then solidified into a block with silica gel to fix the resistor body, so that under vibration, the insulation layer will not be worn, resulting in a short circuit to the ground with the shell; the safety is improved, and the IP65 level waterproof performance is adopted to meet the customer's use in harsh environments, and it has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.
[0014] Figure 1 This is a cross-sectional view of an IP65 brake resistor provided in an embodiment of the present invention.
[0015] Figure numerals: resistor shell 1, isolation pad 2, baffle 3, silicone layer 4, porcelain part 5, sealing sand 6, mica skeleton 7, resistance wire 8, conductive sheet 9, mica isolation board 10, high temperature resistant power line 11, magnesium oxide filling layer 12. DETAILED DESCRIPTION
[0016] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.
[0017] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.
[0018] like Figure 1 As shown, a specific embodiment of the present invention provides an IP65 brake resistor, which has good waterproof sealing effect and good heat dissipation effect, and can be used stably in harsh environments; it specifically includes a resistor shell 1 and a packaging assembly; the resistor body is encapsulated in the resistor shell 1, and the resistor shell 1 forms a front seal and a rear seal corresponding to the front and rear ends of the resistor body, and an isolation pad 2 is provided on the surface of the resistor body to form a heat dissipation space between the surface of the resistor body and the inner wall of the resistor shell 1, and a magnesium oxide filling layer 12 is provided in the heat dissipation space; the packaging assembly includes a baffle 3, a silicone layer 4 and a porcelain part 5 located at the front seal and the rear seal and arranged from the inside to the outside, and a sealing sand 6 is further provided between the silicone layer 4 and the porcelain part 5, and the sealing sand 6 is sealed and fixed to the front and rear ends of the resistor body after high-temperature baking.
[0019] like Figure 1 As shown, through the above-mentioned settings, the resistor shell 1 and the packaging assembly in this embodiment can seal and package the resistor body, and after packaging, the impact resistance and vibration resistance of the resistor are improved, which is conducive to ensuring the electrical performance of the resistor; first, the magnesium oxide filling layer 12 filled in the resistor shell 1 is used to fully dissipate the heat generated by the resistor body when the resistor is working, so as to ensure the electrical performance of the resistor for long-term use; the sealing sand 6 used for sealing is baked at high temperature, and at the same time, the silica gel absorbs moisture in the air and solidifies and connects with the sealing sand 6, which can solidify into a block to fix the resistor body, so that in the case of vibration, there will be no wear of the insulating layer, resulting in a short circuit to the ground with the shell; the sealing part adopts a multi-layer structure of a baffle 3, a silica gel layer 4 and a porcelain part 5 to make the packaging more sealed. Under high-temperature baking, the sealing sand 6 absorbs moisture in the air and solidifies and connects with the sealing sand 6, so that the sealing position forms an IP65-level waterproof structure, which can meet the needs of customers in harsh environments.
[0020] like Figure 1 As shown, in this embodiment, the isolation strip 2 is centrally located on the surface of the resistor body, thereby ensuring that the magnesium oxide filling fully covers the heat dissipation space, ensuring effective heat dissipation from the resistor body. During the magnesium oxide filling process, the magnesium oxide filling layer 12 is placed into the heat dissipation space and then vibrated to fill the heat dissipation space. This vibration filling process makes the magnesium oxide filling layer 12 more compact.
[0021] like Figure 1 As shown, in the sealing process, the ceramic component 5 of the packaging assembly is fixed to the front seal and the rear seal of the resistor shell 1 by means of mold crimping, and the sealing process is more stable and the sealing effect is better.
[0022] like Figure 1As shown, the resistor body provided in this embodiment includes a plurality of mica skeletons 7, on which resistance wires 8 are wound, and the resistance wires 8 are connected to conductive sheets 9. Mica isolation plates 10 are provided between adjacent mica skeletons 7, and the conductive sheets 9 are connected to high-temperature resistant power lines 11 passing through the front seal. In actual applications, the isolation strips 2, front and rear baffles 3, mica skeletons 7, and mica isolation plates 10 are all manufactured through molds, which has high production efficiency. The IP65 brake resistor in this embodiment is tested in accordance with GB5729 and IEC61373, and has obvious performance in short-term overload impact, insulation resistance, load life, 720H salt spray test, and shock resistance, and has high practical value.
[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.
Claims
1. An IP65 brake resistor, characterized in that: include A resistor shell (1) encapsulates a resistor body, the resistor shell (1) forms a front seal and a rear seal corresponding to the front and rear ends of the resistor body, an isolation pad (2) is provided on the surface of the resistor body to form a heat dissipation space between the surface of the resistor body and the inner wall of the resistor shell (1), and a magnesium oxide filling layer (12) is provided in the heat dissipation space; The packaging assembly comprises a baffle (3) located at the front seal and the rear seal and arranged from the inside out, a silicone layer (4) and a porcelain piece (5), a sealing sand (6) is further provided between the silicone layer (4) and the porcelain piece (5), and the sealing sand (6) is baked at a high temperature to seal the front and rear ends of the fixed resistor body.
2. The IP65 brake resistor according to claim 1, characterized in that: The isolation pad (2) is centrally arranged on the surface of the resistor body.
3. The IP65 brake resistor according to claim 1, characterized in that: After the magnesium oxide filling layer (12) is placed in the heat dissipation space, the heat dissipation space is filled through vibration.
4. The IP65 brake resistor according to claim 1, characterized in that: The ceramic component (5) of the packaging assembly is fixed to the front seal and the rear seal of the resistor housing (1) by means of mold crimping.
5. The IP65 brake resistor according to claim 1, characterized in that: The resistor body comprises a plurality of mica skeletons (7), a resistance wire (8) is wound on the mica skeleton (7), the resistance wire (8) is connected to a conductive sheet (9), and a mica isolation plate (10) is provided between adjacent mica skeletons (7).
6. The IP65 brake resistor according to claim 5, characterized in that: The conductive sheet (9) is connected to a high-temperature resistant power line (11) passing through the front seal.