Explosion-proof magnetic suspension centrifugal compressor
By integrating design and using explosion-proof junction boxes, the problems of large size and complex structure of existing explosion-proof centrifugal compressors have been solved, realizing a safe and efficient explosion-proof magnetic levitation centrifugal compressor that meets the requirements for safe operation in explosive environments.
Patent Information
- Application Number
- CN202423012632.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-06
AI Technical Summary
Existing explosion-proof centrifugal compressors are large in size, complex in structure, have many vulnerable parts, are difficult to maintain, and pose safety hazards in explosive environments.
It adopts an explosion-proof magnetic levitation centrifugal compressor. Through integrated design, the electrical components are placed in an explosion-proof box inside the housing. The flange structure and explosion-proof gland joint are used to achieve equipment integration, reduce additional space occupation, and reduce electromagnetic signal interference and ensure safety through O-type seals and internal and external grounding points.
The integrated equipment reduces vulnerable parts, simplifies assembly and maintenance, meets high-level explosion-proof requirements, avoids the need for additional inert gas equipment, and reduces space occupation and cost.
Smart Images
Figure CN223693763U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a compressor technical field, especially an explosion -proof magnetic suspension centrifugal compressor. BACKGROUND
[0002] With the rapid development of compressor industry, the application requirement of compressor is also higher and higher. In most dangerous occasions, such as explosive environment, the demand of centrifugal compressor is increasing day by day, and the compressor exists as a dangerous source in explosive environment, so its design must be safe and reliable, which can ensure that it cannot become an explosion source under normal operation or related fault conditions. Therefore, the application of centrifugal compressor not only needs to ensure green energy saving and high performance, but also meets the requirements of national explosion-proof standards. Therefore, the utility model provides an explosion-proof magnetic suspension centrifugal compressor.
[0003] In the existing technology, most of the explosion-proof centrifugal compressors are huge in size and complex in structure, and many additional auxiliary equipment is needed to improve the explosive environment, and many vulnerable parts are difficult to maintain. UTILITY MODEL CONTENT
[0004] Therefore, the utility model aims at providing an explosion-proof magnetic suspension centrifugal compressor, which has the characteristics of equipment integration, small space occupation and safety and high efficiency.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: an explosion-proof magnetic suspension centrifugal compressor, comprising an adjusting mechanism (1), a volute mechanism (2), a motor (3), a DE terminal terminal board (4), an NDE terminal terminal board (5), a stepping motor terminal board (6), a motor terminal board (7), a motor explosion-proof terminal box (8), an NDE terminal explosion-proof terminal box (9), a DE terminal explosion-proof terminal box (10), a stepping motor explosion-proof terminal box (11), an explosion-proof gland joint (12), an explosion-proof breathing liquid discharge valve (18), a cooling liquid inlet (15), a cooling liquid outlet (16) and a temperature sensor (14); the adjusting mechanism (1) and the motor (3) are arranged at both ends of the volute mechanism (2); the motor explosion-proof terminal box (8) is locked with the motor terminal board; the NDE terminal explosion-proof terminal box (9) is locked with the NDE terminal terminal board (5); the DE terminal explosion-proof terminal box (10) is locked with the DE terminal terminal board (4); the stepping motor explosion-proof terminal box (11) is locked with the stepping motor terminal board (6).
[0006] In a preferred embodiment, the adjusting mechanism (1) is specifically an adjusting valve actuator IGV air inlet assembly, provided with an air inlet, and the IGV sight glass (13) is arranged to realize the observation of the real-time opening degree of the guide vane.
[0007] In a preferred embodiment, the stepping motor terminal block (6) is a flange structure, and the two sides of the stepping motor terminal block (6) are connected by terminal insertion; the external terminals of the stepping motor terminal block (6) are led into the stepping motor explosion-proof terminal box (11), and are led out by the explosion-proof gland joint (12); the stepping motor explosion-proof terminal box (11) is provided with a single outlet, which is used in combination with the explosion-proof gland joint (12).
[0008] In a preferred embodiment, the motor (3) is a permanent magnet synchronous motor, and the temperature sensor (14) detects the temperature of the permanent magnet synchronous motor cavity; the permanent magnet synchronous motor is provided with a cooling liquid inlet (15) and a cooling liquid outlet (16), and the tail end of the permanent magnet synchronous motor is provided with a tail end sight liquid mirror (17); the front and rear ends of the motor (3) are respectively DE end magnetic bearing assemblies and NDE end magnetic bearing assemblies; the DE end magnetic bearing assemblies and the NDE end magnetic bearing assemblies are respectively led out by the DE end terminal block (4) and the NDE end terminal block (5) from the inside to the outside, and are respectively led into the DE end explosion-proof terminal box (10) and the NDE end explosion-proof terminal box (9) and then led out again; the DE end explosion-proof terminal box (10) and the NDE end explosion-proof terminal box (9) are independently distributed.
[0009] In a preferred embodiment, the DE end explosion-proof terminal box (10) is provided with a single outlet, which is used in combination with the explosion-proof gland joint (12).
[0010] In a preferred embodiment, the NDE end explosion-proof terminal box (9) is provided with a double outlet, which is used in combination with the explosion-proof gland joint (12).
[0011] In a preferred embodiment, the motor (3) is led out by the motor terminal block (7); the motor terminal block (7) is locked with the motor (3) by bolts; the motor terminal block (7) is in the form of a ceramic terminal post, and the internal motor cable is led out by a terminal.
[0012] In a preferred embodiment, the motor explosion-proof terminal box (8) includes a terminal box body and a terminal box cover; the motor explosion-proof terminal box (8) is provided with a single outlet, which is used in combination with the explosion-proof gland joint (12).
[0013] In a preferred embodiment, the motor explosion-proof terminal box (8), the DE end explosion-proof terminal box (10), the NDE end explosion-proof terminal box (9), and the stepping motor explosion-proof terminal box (11) are all provided with a breathing liquid discharge interface.
[0014] In a preferred embodiment, the motor explosion-proof terminal box (8), the DE end explosion-proof terminal box (10), the NDE end explosion-proof terminal box (9), and the stepping motor explosion-proof terminal box (11) are all provided with an internal and external grounding point.
[0015] Compared with the prior art, the utility model has the following beneficial effects:
[0016] 1, the explosion -proof terminal box is flange structure, is locked directly with centrifuge shell through bolt, whole structure integration, equipment integration, does not occupy additional flat installation space;
[0017] 2, explosion -proof box structure is simple, and assembly is easy to operate, and the safety requirement can be met with the explosion -proof gland, and the wearing spare part is few;Explosion -proof box can bear the explosion of explosive mixture in the inside of the shell through any joint surface or structure gap of the shell, and will not cause the ignition of the explosive gas environment formed by one or more gas or vapor outside. This structure avoids additional inert gas filling equipment as auxiliary equipment to avoid explosion, reduces the occupation of space;At the same time, O type sealing is adopted, and the high -grade waterproof requirement is met;
[0018] 3, the explosion -proof box bottom is provided with a drain port, and is used in conjunction with a drain device, so that the integrity of the explosion -proof type is maintained, and the liquid can also be discharged from the box;
[0019] 4, the explosion -proof box is provided with internal and external grounding points, the internal grounding can be used to reduce the electromagnetic signal interference of the front and rear magnetic bearing assemblies, and the external grounding can be used for safety protection of the machine. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is the whole structure schematic view of preferred embodiment of the utility model;
[0021] Figure 2 It is the DE terminal block connection schematic view of preferred embodiment of the utility model;
[0022] Figure 3 It is the NDE terminal block connection schematic view of preferred embodiment of the utility model;
[0023] Figure 4 It is the stepping motor terminal block connection schematic view of preferred embodiment of the utility model;
[0024] Figure 5 It is the motor terminal block connection schematic view of preferred embodiment of the utility model;
[0025] Drawing reference: 1-adjusting mechanism, 2-volute mechanism, 3-motor, 4-DE terminal block, 5-NDE terminal block, 6-stepping motor terminal block, 7-motor terminal block, 8-motor explosion -proof terminal box, 9-DE end explosion -proof terminal box, 10-NDE end explosion -proof terminal box, 11-stepping motor explosion -proof terminal box, 12-explosion -proof gland, 13-IGV sight mirror, 14-temperature sensor, 15-cooling liquid inlet, 16-cooling liquid outlet, 17-tail end sight mirror, 18-explosion -proof breathing drain valve. DETAILED DESCRIPTION
[0026] The utility model will be further described below in connection with the drawings and examples.
[0027] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0028] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application; as used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.
[0029] An explosion-proof magnetic suspension centrifugal compressor, referring to Figures 1-5 , comprising an adjusting mechanism 1, a volute mechanism 2, a motor 3, a DE end terminal block 4, an NDE end terminal block 5, a stepping motor terminal block 6, a motor terminal block (7), a motor explosion-proof terminal box 8, an NDE end explosion-proof terminal box 9, a DE end explosion-proof terminal box 10, a stepping motor explosion-proof terminal box 11, an explosion-proof gland joint 12, an explosion-proof breathing liquid discharge valve 18, a cooling liquid inlet 15, a cooling liquid outlet 16 and a temperature sensor 14; the adjusting mechanism 1 and the motor 3 are arranged at both ends of the volute mechanism 2; the motor explosion-proof terminal box 8 is locked with the motor terminal block; the NDE end explosion-proof terminal box 9 is locked with the NDE end terminal block 5; the DE end explosion-proof terminal box 10 is locked with the DE end terminal block 4; and the stepping motor explosion-proof terminal box 11 is locked with the stepping motor terminal block 6. The explosion-proof magnetic suspension centrifugal compressor can normally operate in an explosive environment, and cannot become an ignition source under normal operation or expected fault conditions. The explosion-proof magnetic suspension centrifugal refrigeration compressor of the utility model places all electrical elements in the corresponding explosion-proof box on the shell and performs protection treatment on the aligned explosion-proof housing.
[0030] The adjusting mechanism 1 is an IGV inlet component, provided with an air inlet, the opening degree of IGV blades is adjusted through a built-in stepping motor, the purpose of controlling the inlet air quantity is achieved, and one side is provided with an IGV sight glass 13 for observing the real-time opening degree of the guide vane; the outgoing line of the built-in stepping motor is led out from the inside of the stepping motor wiring board 6, the stepping motor wiring board 6 is a flange type structure, and the cables on both sides are connected through plug-in terminals; after the external terminals are led out, they enter the stepping motor explosion-proof junction box 11, and are led out through the explosion-proof gland joint 12; the stepping motor explosion-proof junction box 11 is provided with a single outgoing line port, and the junction port is used in combination with the explosion-proof gland joint 12; the stepping motor explosion-proof junction box 11 is a flange type structure, an explosion-proof joint surface is designed according to the national standard explosion-proof requirements, and the explosion-proof requirements are achieved by locking with the adjusting mechanism; the stepping motor outgoing line path is only the stepping motor explosion-proof junction box 11.
[0031] The motor 3 is a permanent magnet synchronous motor, independent temperature monitoring is arranged on the motor cavity body, and an intrinsically safe temperature sensor 14 is used; the motor is also provided with a middle cooling liquid inlet and outlet 15 / 16, and a tail end is provided with a sight glass 17, which is connected in a threaded mode and sealed by an O-shaped ring; the cooling liquid is derived from a matched unit, and the entering amount of the cooling liquid is controlled through a feedback signal of the temperature sensor; the motor is provided with two groups of magnetic bearing assemblies in front and back, which are DE end magnetic bearing assemblies and NDE end magnetic bearing assemblies respectively; the outgoing lines of the magnetic bearing assemblies are led out from the inside to the outside by the DE end wiring board 4 and the NDE end wiring board 5 respectively; the DE end wiring board 4 and the NDE end wiring board 5 are both flange type structures, and the cables on both sides are connected through plug-in and welding; the wiring board can be independently disassembled without affecting the disassembly of the magnetic bearing. After being led out, they respectively enter the DE end explosion-proof junction box 10 and the NDE end explosion-proof junction box 9 and are led out again; the DE end explosion-proof junction box 10 and the NDE end explosion-proof junction box 9 are independently distributed respectively and do not interfere with each other. Specifically, the lead wire adopts a plug pin and welding combination mode, the wiring board has a certain number of independent plug pins on both sides, a certain length of cable is welded with the plug pin, the cable is grouped according to a rule, and a connector is used to fix the cable at the other end; in this way, the magnetic bearing assembly and the wiring board can be independent individuals, so that the wiring board can be independently disassembled without damaging the cable and the plug pin during the later disassembly and maintenance; the DE end explosion-proof junction box 10 and the NDE end explosion-proof junction box 9 are flange type structures, the DE end wiring board 4 and the NDE end wiring board 5 and their outgoing cable are wrapped in the box body after being locked with the shell through bolts; according to the national standard explosion-proof requirements, the length of the explosion-proof joint surface is designed, so that the explosion-proof box can withstand the explosion of the explosive mixture in the shell without being damaged, and ignition of the explosive gas environment formed by one or more gases or vapors outside will not be caused. This structure does not need to add additional auxiliary equipment to improve the safety line of the equipment, the occupied area is greatly reduced, the number of vulnerable parts is small, the number of equipment is reduced, and the time cost, labor cost and after-sales cost are saved.
[0032] The DE end explosion-proof junction box 10 is provided with a single outlet, which is matched with an explosion-proof gland joint 12; after locking, the two and the shell form a complete explosion-proof structure; the overall structure is integrated, the equipment is integrated, and no additional installation space is occupied on the flat ground; the DE end explosion-proof junction box 10 is a flange structure, the explosion-proof joint surface is designed according to the national standard explosion-proof requirements, and the explosion-proof requirements are achieved by locking with the motor; the DE end magnetic bearing outlet path is only the DE end explosion-proof junction box 10.
[0033] The NDE end explosion-proof junction box 9 is provided with a double outlet, which is matched with an explosion-proof gland joint 12; the NDE end explosion-proof junction box 9 is a flange structure, the explosion-proof joint surface is designed according to the national standard explosion-proof requirements, and the explosion-proof requirements are achieved by locking with the motor; the NDE end magnetic bearing outlet path is only the DE end explosion-proof junction box 10.
[0034] The motor 3 outlet is a wiring board 7 structure; the wiring board 7 is locked with the motor 3 by bolts; the wiring board 7 is in the form of a ceramic terminal post, and the internal motor cable is led out through a terminal.
[0035] The motor explosion-proof junction box 8 is a combined structure composed of a junction box body and a junction box cover; the motor explosion-proof junction box 8 is designed according to the national standard explosion-proof requirements, and the junction box body and the wiring board 7 are locked to achieve the explosion-proof requirements; the motor power line path is only the motor explosion-proof junction box 8.
[0036] The motor explosion-proof junction box 8 is provided with a single outlet, which is matched with an explosion-proof gland joint 12.
[0037] The motor explosion-proof junction box 8, the DE end explosion-proof junction box 10, the NDE end explosion-proof junction box 9, and the step motor explosion-proof junction box 11 are all provided with a breathing and liquid discharge interface.
[0038] The motor explosion-proof junction box 8, the DE end explosion-proof junction box 10, the NDE end explosion-proof junction box 9, and the step motor explosion-proof junction box 11 are all provided with internal and external grounding.
[0039] The motor explosion-proof junction box 8 and the step motor explosion-proof junction box 11 are integrally locked with the step motor wiring board 6 and the motor wiring board 7.
[0040] Specifically, the explosion-proof junction box joint surface adopts O-ring sealing; the explosion-proof junction box is matched with a mechanical explosion-proof breathing and liquid discharge valve 18; if there is liquid accumulation in the box, the internal liquid can be directly discharged outside the junction box; the internal grounding of the explosion-proof junction box is led out through the explosion-proof gland joint together with the signal line.
Claims
1. An explosion-proof magnetic levitation centrifugal compressor, characterized by, The adjusting mechanism (1), the volute mechanism (2), the motor (3), the DE terminal terminal block (4), the NDE terminal terminal block (5), the stepping motor terminal block (6), the motor terminal block (7), the motor explosion-proof terminal box (8), the NDE end explosion-proof terminal box (9), the DE end explosion-proof terminal box (10), the stepping motor explosion-proof terminal box (11), the explosion-proof gland joint (12), the cooling liquid inlet (15), the cooling liquid outlet (16) and the temperature sensor (14) are included.
2. A magnetic levitation centrifugal compressor of the explosion-proof type according to claim 1, characterized in that, The adjusting mechanism (1) and the motor (3) are arranged at both ends of the volute mechanism (2).
3. The explosion-proof magnetic levitation centrifugal compressor according to claim 1, characterized in that, The stepping motor terminal block (6) is a flange structure, and the double-sided cable of the stepping motor terminal block (6) is connected by using a terminal plug connection.
4. The explosion-proof magnetic levitation centrifugal compressor according to claim 1, characterized in that The motor (3) is a permanent magnet synchronous motor, and the temperature sensor (14) detects the temperature of the permanent magnet synchronous motor cavity. The DE end explosion-proof terminal box (10) and the NDE end explosion-proof terminal box (9) are independently distributed.
5. A magnetic bearing centrifugal compressor of the type defined above in claim 4, characterised in that, The DE end explosion-proof terminal box (10) is provided with a single wire outlet and is used in combination with the explosion-proof gland joint (12).
6. A flameproof magnetic levitation centrifugal compressor according to claim 4, characterized in that, The NDE end explosion-proof terminal box (9) is provided with a double wire outlet and is used in combination with the explosion-proof gland joint (12).
7. A magnetic bearing centrifugal compressor of the type defined above in claim 4, characterised in that, The motor (3) is provided with a motor terminal block (7), and the motor terminal block (7) is bolted with the motor (3).
8. The explosion-proof magnetic levitation centrifugal compressor according to claim 1, characterized in that The motor explosion-proof terminal box (8) includes a terminal box body and a terminal box cover. The motor explosion-proof terminal box (8) is provided with a single wire outlet and is used in combination with the explosion-proof gland joint (12).
9. The explosion-proof magnetic levitation centrifugal compressor according to claim 1, characterized in that The motor explosion-proof junction box (8), DE end explosion-proof junction box (10), NDE end explosion-proof junction box (9), and stepping motor explosion-proof junction box (11) are all provided with a breathing liquid discharge interface.
10. The explosion-proof magnetic levitation centrifugal compressor according to claim 1, characterized in that The motor explosion-proof junction box (8), DE end explosion-proof junction box (10), NDE end explosion-proof junction box (9), and stepping motor explosion-proof junction box (11) are all provided with an internal and external grounding point.