Magnetic suspension centrifugal compressor

Abstract

The utility model relates to the field of compressors, and discloses a magnetic suspension centrifugal compressor, which comprises a shell; a sliding groove penetrating through the shell is formed in the top of the shell. The shell is slidably connected with a sliding plate located at the top of the shell, the face, facing the shell, of the top of the sliding plate is fixedly connected with a longitudinal telescopic rod, and one side of the sliding plate is fixedly connected with a transverse telescopic rod facing the same direction as the shell. The side, close to the shell, of the longitudinal telescopic rod is fixedly connected with a connecting piece, and the side, away from the longitudinal telescopic rod, of the connecting piece is fixedly connected with a connecting rod and a limiting piece. The ends, away from the connecting pieces, of the connecting rods are fixedly connected with transverse rods. According to the utility model, the magnetic rod is driven by the longitudinal telescopic rod and the transverse telescopic rod to enter the space between the magnetic suspension bearing and the rotor, so that metal scraps attached to the magnetic suspension bearing and the rotor are adsorbed to the outer sides of the magnetic rods under the action of the magnetic force of the magnetic rod; and unstable rotation of the rotor caused by the fact that the metal scraps are attached to the magnetic suspension bearing and the rotor is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of compressor, especially a kind of magnetic suspension centrifugal compressor. BACKGROUND

[0002] Magnetic suspension centrifugal compressor is a kind of compressor using magnetic suspension bearing technology and centrifugal compression principle, generally comprising centrifugal compressor body, magnetic suspension bearing system, driving motor and control system.Magnetic suspension bearing system uses electromagnetic force to realize the suspension of rotor, thereby reducing mechanical friction and energy loss.

[0003] In the prior art, when gas enters the inside of magnetic suspension centrifugal compressor, due to different gas properties and different humidity, some gases can corrode the components inside the magnetic suspension centrifugal compressor, forming metal debris.Meanwhile, in the process of magnetic suspension bearing from energization to non-energization, the rotor provided in the magnetic suspension bearing is no longer subjected to the force of the magnetic suspension bearing, and will fall under the influence of gravity and contact the magnetic suspension bearing and produce knock, which will also produce metal debris.During the energization of the magnetic suspension bearing, the metal debris will be attracted, affecting the movement of the rotor driven by the magnetic suspension bearing, causing the rotor to be difficult to rotate smoothly.

[0004] Therefore, the present application provides a magnetic suspension centrifugal compressor to meet the needs. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to provide a magnetic suspension centrifugal compressor to solve the problem of attracting metal debris generated inside the compressor during the operation of the existing magnetic suspension bearing and reducing the stability of rotor rotation.

[0006] To solve the above-mentioned problems, the utility model is implemented by the following technical solutions.

[0007] A magnetic suspension centrifugal compressor, comprising:

[0008] A housing;

[0009] The housing is provided with a chute passing through the housing at the top of the housing;

[0010] The housing is slidingly connected with a sliding plate located at the top of the housing, the top of the sliding plate is fixedly connected with a longitudinal telescopic rod on the side facing the housing, and the side of the sliding plate is fixedly connected with a transverse telescopic rod facing the same direction as the housing; the side of the longitudinal telescopic rod close to the housing is fixedly connected with a connecting piece, and the side of the connecting piece away from the longitudinal telescopic rod is fixedly connected with a connecting rod and a limiting piece;

[0011] The end of the connecting rod away from the connecting piece is fixedly connected with a crossbar, and the end of the limiting piece away from the connecting piece is fixedly connected with a sleeve rod;

[0012] The magnetic rod is fixedly connected to one end of the cross bar away from the connecting rod, and the sleeve rod is arranged outside the magnetic rod and is in sliding connection with the cross bar.

[0013] The sleeve rod is fixedly connected with a sealing member on a side away from the limiting member, the sealing member is fixedly connected with an elastic member on a side close to the sleeve rod, and the other end of the elastic member is fixedly connected with the sleeve rod.

[0014] The sealing member is arranged to seal the sliding groove, and the two ends of the sealing member are arranged in a circular arc shape.

[0015] Preferably, the two limiting members are arranged on the same side of the sleeve rod and flush with the side of the sleeve rod, and the two limiting members are attached to the two side walls of the sliding groove.

[0016] Preferably, the connecting rod and the two limiting members extend from the outside of the shell to the inside of the shell, and the connecting rod and the limiting member are arranged to slide longitudinally and transversely in the sliding groove.

[0017] Preferably, the diameter of the magnetic rod is less than the diameter of the magnetic bearing minus half the diameter of the rotor.

[0018] Preferably, the sealing member is a battery shielding composite material, and a rubber layer resistant to electromagnetic signals is wrapped outside the sealing member.

[0019] Preferably, the inside of the shell is provided with a power part, the inner walls at both ends of the power part are fixedly connected with magnetic bearings, the inner wall of the middle part of the power part is fixedly connected with a permanent magnet motor, the shell is provided with a rotor in the power part, and the rotor is arranged in the magnetic bearing and the permanent magnet motor.

[0020] Preferably, one end of the shell is provided as an air inlet end, and the air inlet end is communicated with an expansion passage on a side close to the power part.

[0021] Preferably, the rotor is fixedly connected with two side-by-side impellers on an end close to the expansion passage, and the expansion passage is communicated with an air outlet end away from the air inlet end through the two impellers.

[0022] The utility model provides a kind of magnetic suspension centrifugal compressor.Compared with prior art, it has the following beneficial effects:

[0023] The longitudinal telescopic rod and the transverse telescopic rod drive the magnetic rod to enter between the magnetic bearing and the rotor, so that under the magnetic force of the magnetic rod, the metal scrap attached to the magnetic bearing and the rotor is adsorbed to the outside of the magnetic rod, avoiding the metal scrap attached to the magnetic bearing and the rotor to cause unstable rotation of the rotor. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a whole structure schematic view of the utility model.

[0025] Figure 2 It is the internal section structure schematic view of the utility model.

[0026] Figure 3 It is the longitudinal telescopic rod, connecting piece, connecting rod and limit piece connection structure schematic view of the utility model.

[0027] Figure 4 It is the longitudinal telescopic rod, connecting piece, connecting rod and limit piece connection structure schematic view of the utility model.

[0028] Figure 5 It is the longitudinal telescopic rod, connecting piece, connecting rod and limit piece connection structure schematic view of the utility model. Figure 3 It is the enlarged structure schematic view of A place in the utility model.

[0029] Figure 6 It is the longitudinal telescopic rod, connecting piece, connecting rod and limit piece connection structure schematic view of the utility model. Figure 1 It is the enlarged structure schematic view of B place in the utility model.

[0030] Figure 7 It is the structure schematic view of the magnetic rod when working.

[0031] The reference numerals in the drawing are:

[0032] 10, shell; 11, air inlet end; 12, pressure recovery channel; 13, exhaust end; 14, magnetic suspension bearing; 15, permanent magnet motor; 16, rotor; 161, impeller; 17, power part; 18, sliding slot; 20, longitudinal telescopic rod; 21, connecting piece; 22, connecting rod; 23, limit piece; 24, cross rod; 25, sleeve rod; 26, magnetic rod; 27, sealing piece; 271, elastic piece; 28, sliding plate; 29, transverse telescopic rod. DETAILED DESCRIPTION

[0033] The utility model will be further described below in combination with specific embodiments, and it should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the protection scope of the utility model.

[0034] The embodiments of the utility model are described below through specific examples, and the person skilled in the art can easily understand other advantages and effects of the utility model from the disclosure of the specification. The utility model can also be implemented or applied through other different specific embodiments, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model.

[0035] Referring to Figures 1-7 , a magnetic suspension centrifugal compressor, comprising:

[0036] The shell 10;

[0037] The shell 10 is provided with a sliding slot 18 penetrating the shell 10 at the top of the shell 10;

[0038] The shell 10 is slidably connected with a sliding plate 28 located at the top of the shell 10, the top of the sliding plate 28 is fixedly connected with a longitudinal telescopic rod 20 towards one side of the shell 10, one side of the sliding plate 28 is fixedly connected with a transverse telescopic rod 29 towards the same side as the shell 10; the side of the longitudinal telescopic rod 20 close to the shell 10 is fixedly connected with a connecting piece 21, the side of the connecting piece 21 away from the longitudinal telescopic rod 20 is fixedly connected with a connecting rod 22 and a limiting piece 23;

[0039] Further, as shown in Figure 1 , the longitudinal telescopic rod 20 drives the connecting piece 21 to move up and down, and the transverse telescopic rod 29 drives the longitudinal telescopic rod 20 to move left and right.

[0040] The end of the connecting rod 22 away from the connecting piece 21 is fixedly connected with a crossbar 24, and the end of the limiting piece 23 away from the connecting piece 21 is fixedly connected with a sleeve rod 25;

[0041] The end of the crossbar 24 away from the connecting rod 22 is fixedly connected with a magnetic rod 26, and the sleeve rod 25 is arranged outside the magnetic rod 26 and is slidably connected with the crossbar 24;

[0042] Further, as shown in Figure 5 , the sleeve rod 25 can be slid to the outside of the magnetic rod 26 or the outside of the crossbar 24.

[0043] The side of the sleeve rod 25 away from the limiting piece 23 is fixedly connected with a sealing piece 27, the side of the sealing piece 27 close to the sleeve rod 25 is fixedly connected with an elastic piece 271, and the other end of the elastic piece 271 is fixedly connected with the sleeve rod 25;

[0044] Further, the elastic piece 271 drives the sleeve rod 25 to be in the state shown in Figure 5 by its own elasticity.

[0045] The sealing piece 27 is arranged to seal the sliding groove 18, and the two ends of the sealing piece 27 are arranged in a circular arc shape.

[0046] Further, as shown in Figure 2 , the external environment and the magnetic rod 26 are prevented from affecting the operation of the magnetic suspension centrifugal compressor.

[0047] The limiting piece 23 is provided in two, and the sides of the two limiting pieces 23 away from each other are flush with the same side of the sleeve rod 25, and the two limiting pieces 23 are attached to the two side walls of the sliding groove 18.

[0048] Further, as shown in Figure 5 , when the limiting piece 23 contacts one end of the sliding groove 18, the end of the sliding groove 18 sealed by the sealing piece 27 prevents the limiting piece 23 from moving.

[0049] The connecting rod 22 and the two limiting members 23 extend from the outside of the shell 10 to the inside of the shell 10, and are arranged to slide longitudinally and transversely in the sliding groove 18.

[0050] Further, as Figures 3 to 6 shown, the longitudinal telescopic rod 20 and the transverse telescopic rod 29 drive the connecting rod 22 and the limiting members 23 to move longitudinally and transversely in the sliding groove 18.

[0051] The magnetic force rod 26 has a diameter smaller than the diameter of the magnetic levitation bearing 14 minus half the diameter of the rotor 16.

[0052] Further, the magnetic force rod 26 can be inserted between the magnetic levitation bearing 14 and the rotor 16 to adsorb metal debris.

[0053] The sealing member 27 is a battery shielding composite material, and the outside of the sealing member 27 is wrapped with a rubber layer resistant to electromagnetic signals.

[0054] Further, the sealing member 27 improves the ability to shield electromagnetic signals and seal.

[0055] The inside of the shell 10 is provided with a power part 17, both ends of the power part 17 are fixedly connected with the magnetic levitation bearing 14, the inner wall of the middle part of the power part 17 is fixedly connected with the permanent magnet motor 15, the shell 10 is provided with the rotor 16 in the power part 17, and the rotor 16 is arranged in the magnetic levitation bearing 14 and the permanent magnet motor 15.

[0056] Further, as shown, the permanent magnet motor 15 drives the rotor 16 to rotate, and the magnetic levitation bearing 14 supports the rotor 16.

[0057] One end of the shell 10 is provided as an air inlet end 11, and the air inlet end 11 is communicated with a pressure expansion channel 12 on the side close to the power part 17.

[0058] Further, as Figure 2 shown, external gas enters the inside of the shell 10 through the air inlet end 11.

[0059] The rotor 16 is fixedly connected with two side-by-side impellers 161 at one end close to the pressure expansion channel 12, and the pressure expansion channel 12 is communicated with an air outlet end 13 through the two impellers 161 away from the air inlet end 11.

[0060] Further, as Figure 2 shown, the impellers 161 rotate to realize gas compression, and the compressed gas is transmitted to the air outlet end 13 through the pressure expansion channel 12.

[0061] Working process and principle: initial state: as Figure 1 and Figure 2As shown, the seal 27 is located inside the slide groove 18, sealing the power unit 17. By utilizing the shielding and sealing capabilities of the seal 27, the normal operation of the magnetic levitation centrifugal compressor is not affected.

[0062] When the magnetic levitation centrifugal compressor stops working, in order to clean the metal shavings inside the compressor, at this time: the longitudinal telescopic rod 20 drives the connecting piece 21 to move downwards, so that... Figure 5 Each component enters the power unit 17 from the slide 18. When the magnetic rod 26 moves to the horizontal position between the magnetic levitation bearing 14 and the rotor 16, the transverse telescopic rod 29 drives... Figure 5 Each component in the middle Figure 2 The magnetic levitation bearing 14 moves laterally. During this lateral movement, the limiting member 23 contacts the arc-shaped end of the slide groove 18 and cannot move laterally, thus keeping the sleeve 25, which is fixedly connected to the limiting member 23, in a stationary state. Figure 7 As shown, the magnetic rod 26 extends from the sleeve 25 under the action of the transverse telescopic rod 29 and enters... Figure 2 The magnetic levitation bearing 14 is positioned between the rotor 16 and the magnetic levitation bearing 14, at which point the elastic element 271 is compressed. When the magnetic rod 26 is energized, it generates magnetic force, attracting metal debris from inside the housing 10. After attraction is complete, the longitudinal telescopic rod 20 and the transverse telescopic rod 29... Figure 5 Each component shown moves to its initial state. During this process, under the elastic force of the elastic element 271, the sleeve 25 returns to its original position. Figure 5 The location shown.

[0063] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. A magnetically levitated centrifugal compressor, characterized in that, include: Shell (10); The top of the housing (10) is provided with a sliding groove (18) that penetrates the housing (10); The housing (10) is slidably connected to a sliding plate (28) located at the top of the housing (10). A longitudinal telescopic rod (20) is fixedly connected to the side of the top of the sliding plate (28) facing the housing (10). A transverse telescopic rod (29) facing the same direction as the housing (10) is fixedly connected to one side of the sliding plate (28). A connector (21) is fixedly connected to the side of the longitudinal telescopic rod (20) close to the housing (10). A connecting rod (22) and a limiting member (23) are fixedly connected to the side of the connector (21) away from the longitudinal telescopic rod (20). A crossbar (24) is fixedly connected to the end of the connecting rod (22) away from the connecting piece (21), and a sleeve rod (25) is fixedly connected to the end of the limiting piece (23) away from the connecting piece (21). A magnetic rod (26) is fixedly connected to one end of the crossbar (24) away from the connecting rod (22), and a sleeve rod (25) is set outside the magnetic rod (26) and is slidably connected to the crossbar (24); A sealing element (27) is fixedly connected to the side of the sleeve rod (25) away from the limiting element (23), and an elastic element (271) is fixedly connected to the side of the sealing element (27) close to the sleeve rod (25). The other end of the elastic element (271) is fixedly connected to the sleeve rod (25). The seal (27) is configured to seal the groove (18), and both ends of the seal (27) are configured to be arc-shaped.

2. A magnetic levitation centrifugal compressor according to claim 1, characterized in that, The limiting member (23) is set to two, and the side of the two limiting members (23) away from each other is flush with the same side of the sleeve rod (25). The two limiting members (23) are attached to the side walls of the slide groove (18).

3. A magnetic levitation centrifugal compressor according to claim 1, characterized in that, The connecting rod (22) and the two limiting members (23) extend from the outside of the housing (10) into the housing (10), and the connecting rod (22) and the limiting members (23) are configured to slide longitudinally and laterally within the groove (18).

4. A magnetically levitated centrifugal compressor according to claim 1, characterized in that, The diameter of the magnetic rod (26) is less than half the diameter of the magnetic levitation bearing (14) minus the diameter of the rotor (16).

5. A magnetically levitated centrifugal compressor according to claim 1, characterized in that, The sealing element (27) is a battery shielding composite material, and the outer side of the sealing element (27) is wrapped with a layer of rubber that resists electromagnetic signals.

6. A magnetic levitation centrifugal compressor according to claim 1, characterized in that, The housing (10) has a power unit (17) inside. Magnetic levitation bearings (14) are fixedly connected to the inner walls at both ends of the power unit (17). A permanent magnet motor (15) is fixedly connected to the inner wall in the middle of the power unit (17). A rotor (16) is provided in the power unit (17) of the housing (10). The rotor (16) is located in the magnetic levitation bearings (14) and the permanent magnet motor (15).

7. A magnetically levitated centrifugal compressor according to claim 6, characterized in that, One end of the housing (10) is configured as an air inlet (11), and the side of the air inlet (11) near the power unit (17) is connected to a diffuser channel (12).

8. A magnetic levitation centrifugal compressor according to claim 7, characterized in that, Two impellers (161) are fixedly connected to one end of the rotor (16) near the diffuser channel (12). The diffuser channel (12) away from the intake end (11) is connected to the exhaust end (13) through the two impellers (161).

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