Centrifugal air compressor

Abstract

The centrifugal air compressor comprises a motor and a junction box, the motor comprises a machine shell and a stator assembly, an installation boss is arranged on the side face of the machine shell, the junction box is installed on the installation boss, and a second connecting hole corresponding to the first connecting hole is formed in the bottom of the junction box. A leading-out wire of the stator assembly penetrates through the first connecting hole, the second connecting hole and the second cavity to be electrically connected with the high-voltage connector, a wiring baffle is arranged in the wiring box, a plurality of groups of through holes are formed in the wiring baffle and comprise a plurality of first through holes, a plurality of second through holes and a plurality of third through holes, the first through holes are formed in the middle of the wiring baffle, and the second through holes are formed in the middle of the wiring baffle. The plurality of first through holes are used for allowing outgoing lines of the stator assembly to penetrate through, the plurality of second through holes are used for being fixedly installed with the junction box, and the plurality of third through holes are used for assisting in enhancing the flowability of air flow in the junction box, so that the flowability of the air in the junction box is improved, the heat dissipation effect is enhanced, and the operation stability of the centrifugal air compressor is improved. The structural arrangement is reasonable.

Description

Technical Field

[0001] The utility model relates to a centrifugal air compressor. Background Art

[0002] The existing three-phase wiring connection of centrifugal air compressors is generally set at the junction box outside the casing. The lead wires of the stator assembly are led out to the junction box and connected to the high-voltage connector, and then connected to the external three-phase line through the connector; a wiring protection baffle is generally set in the path of the lead wires of the stator assembly passing through the casing and the junction box to limit the distance between the lead wires and other metal parts and play a role in auxiliary insulation. After the protective baffle is placed, the gas circulation inside the junction box is poor, and the liquid cooling channel of the centrifugal air compressor casing generally directly cools the stator, and there is no additional cooling for the stator lead wire part. Summary of the invention

[0003] The utility model aims to provide a centrifugal air compressor to solve the technical problems in the prior art that the gas flow inside the junction box is poor after the protective baffle is placed, and the liquid cooling channel of the centrifugal air compressor casing generally directly cools the stator, and the stator lead wire part has no additional cooling.

[0004] The technical solution of the utility model is achieved in this way:

[0005] The utility model provides a centrifugal air compressor, including a motor and a junction box, the motor including a casing and a stator assembly, a cavity is provided in the casing, the stator assembly is installed in the cavity, a mounting boss is provided on the side of the casing, a connecting hole communicating with a first cavity is provided in the middle of the mounting boss, the junction box is installed on the mounting boss, a second cavity is provided in the junction box, a second connecting hole corresponding to the first connecting hole is provided at the bottom of the junction box, a high-voltage connector is provided on the side of the junction box, a lead wire of the stator assembly passes through the first connecting hole, the second connecting hole and the second cavity and is electrically connected to the high-voltage connector, and the utility model is characterized in that:

[0006] A wiring baffle is provided in the junction box, and a plurality of groups of through holes are provided on the wiring baffle, the plurality of groups of through holes include a plurality of first through holes, a plurality of second through holes and a plurality of third through holes, the plurality of first through holes are arranged in the middle position of the wiring baffle, the plurality of second through holes are arranged at the front and rear sides of the first through holes, the plurality of third through holes are arranged at the left and right sides of the first through holes, the plurality of first through holes are used for the lead wires of the stator assembly to pass through, the plurality of second through holes are used for fixed installation with the junction box, and the plurality of third through holes are used for assisting in enhancing the fluidity of the airflow inside the junction box.

[0007] The several groups of through holes mentioned above also include several fourth through holes, which are arranged at the four corners of the wiring baffle. The bottom of the junction box is provided with several first mounting holes, and the mounting boss is provided with several second mounting holes corresponding to the first mounting holes. The junction box is fixed on the mounting boss by screws passing through the first mounting holes and lockingly connecting with the second mounting holes. The screws correspond to the positions of the fourth through holes for screw installation operations.

[0008] The plurality of groups of through holes mentioned above further include a fifth through hole, which is used to lead out a signal line of the stator assembly, and is located between the first through hole, the second through hole, the third through hole and the fourth through hole.

[0009] The wiring baffle mentioned above is composed of two baffle plates with the same structure.

[0010] The wiring baffle mentioned above is made of non-metallic insulating material.

[0011] The junction box described above includes a junction box body and a cover plate. The junction box body includes a bottom plate and a first side plate protruding from the top surface of the bottom plate. The bottom plate is mounted on the end surface of the mounting boss. The high-voltage connector is mounted on the first side plate. The second connection hole is arranged on the bottom plate.

[0012] The annular bottom plate described above is provided with a step for supporting and installing the wiring baffle, and the step is provided with a third mounting hole corresponding to the second through hole. The wiring baffle is fixed in the junction box by screws passing through the second through hole and lockingly connected with the third mounting hole.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The utility model includes a motor and a junction box. The motor includes a housing and a stator assembly. A cavity is provided in the housing. The stator assembly is installed in the cavity. A mounting boss is provided on the side of the housing. A connecting hole communicating with a first cavity is provided in the middle of the mounting boss. The junction box is installed on the mounting boss. A second cavity is provided in the junction box. A second connecting hole corresponding to the first connecting hole is provided at the bottom of the junction box. A high-voltage connector is provided on the side of the junction box. The lead wire of the stator assembly passes through the first connecting hole, the second connecting hole and the second cavity to be electrically connected to the high-voltage connector. A wiring baffle is provided in the junction box. A plurality of through holes are provided on the wiring baffle. If The dry group through holes include a plurality of first through holes, a plurality of second through holes and a plurality of third through holes, wherein the plurality of first through holes are arranged in the middle position of the wiring baffle, the plurality of second through holes are arranged at the front and rear sides of the first through holes, and the plurality of third through holes are arranged at the left and right sides of the first through holes. The plurality of first through holes are used for allowing the lead wires of the stator assembly to pass through, the plurality of second through holes are used for fixed installation with the junction box, and the plurality of third through holes are used for assisting in enhancing the fluidity of the airflow inside the junction box, thereby increasing the fluidity of the gas inside the junction box, enhancing the heat dissipation effect, and being beneficial to improving the operating stability of the centrifugal air compressor, and the structural arrangement is reasonable.

[0015] 2. Other advantages of the utility model are described in detail in the embodiment section of the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A stereogram provided for the utility model;

[0017] Figure 2 A side view provided for the utility model;

[0018] Figure 3 for Figure 2 Sectional view of AA in the middle;

[0019] Figure 4 for Figure 3 A partial enlarged view of B in the middle;

[0020] Figure 5 A schematic diagram of the structure provided by the utility model;

[0021] Figure 6 A schematic diagram of a local structure provided by the utility model;

[0022] Figure 7 A partial exploded view provided for the utility model;

[0023] Figure 8 An exploded view of the motor and the junction box provided by the utility model;

[0024] Fig. 9 A three-dimensional diagram of the wiring baffle provided by the utility model;

[0025] Fig.10 This is an exploded view of the wiring baffle provided by the utility model. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1:

[0028] like Figures 1 to 10 As shown, this embodiment provides a centrifugal air compressor, including a motor 1 and a terminal box 2, the motor 1 includes a housing 11 and a stator assembly 12, the housing 11 is provided with a cavity 110, the stator assembly 12 is installed in the cavity 110, a mounting boss 111 is provided on the side of the housing 11, a connecting hole 1111 communicating with the first cavity 110 is provided in the middle of the mounting boss 111, the terminal box 2 is installed on the mounting boss 111, a second cavity 21 is provided in the terminal box 2, a second connecting hole 22 corresponding to the first connecting hole 1111 is provided at the bottom of the terminal box 2, a high-voltage connector 23 is provided on the side of the terminal box 2, and the lead wire of the stator assembly passes through the first connecting hole 1111, the second connecting hole 22 and the second cavity 21 and is electrically connected to the high-voltage connector 23, characterized in that:

[0029] A wiring baffle 3 is provided in the junction box 2, and a plurality of groups of through holes are provided on the wiring baffle 3, the plurality of groups of through holes include a plurality of first through holes 31, a plurality of second through holes 32 and a plurality of third through holes 33, the plurality of first through holes 31 are arranged in the middle position of the wiring baffle 3, the plurality of second through holes 32 are arranged at the front and rear sides of the first through holes 31, the plurality of third through holes 33 are arranged at the left and right sides of the first through holes 31, the plurality of first through holes 31 are used for the lead wires of the stator assembly 12 to pass through, the plurality of second through holes 32 are used for fixed installation with the junction box 2, and the plurality of third through holes 33 are used for assisting in enhancing the fluidity of the airflow inside the junction box 2, so that the fluidity of the gas inside the junction box is increased, the heat dissipation effect is enhanced, and it is beneficial to improve the operating stability of the centrifugal air compressor, and the structural arrangement is reasonable.

[0030] The above-mentioned several groups of through holes also include several fourth through holes 34, and the fourth through holes 34 are arranged at the four corners of the wiring baffle 3. The bottom of the junction box 2 is provided with several first mounting holes 24, and the mounting boss 111 is provided with several second mounting holes 1112 corresponding to the first mounting holes 24. The junction box 2 is fixed on the mounting boss 111 by screws passing through the first mounting holes 24 and lockingly connecting with the second mounting holes 1112. The screws correspond to the positions of the fourth through holes 34 and are used for screw installation operations. When looking from the cover installation plane of the junction box to the inside of the junction box, the installation screws are not blocked, and visual inspection or comparison with a high-definition camera can be performed to check whether there are any screws missing, thereby improving assembly reliability.

[0031] The above-mentioned several groups of through holes also include a fifth through hole 35, which is used to lead out the signal line of the stator assembly. The fifth through hole 35 is located between the first through hole 31, the second through hole 32, the third through hole 33 and the fourth through hole 34, which is convenient for distinguishing the signal line and the lead-out line position of the stator assembly, and the structural arrangement is reasonable.

[0032] The above-mentioned wiring baffle 3 is composed of two baffle plates 30 of the same structure. After assembling two identical baffles, the function of protecting the wiring baffle is obtained. The parts are highly commonalized, which is beneficial to reducing product costs. In addition, the through holes of the wiring baffle and the gaps formed after the internal parts of the wiring box are assembled increase the gas fluidity inside the wiring box, enhance the heat dissipation effect, and are beneficial to improving the operating stability of the air compressor.

[0033] The wiring baffle 3 is made of non-metallic insulating material.

[0034] The above-mentioned junction box 2 includes a junction box body 25 and a cover plate 26. The junction box body 25 includes a bottom plate 251 and a first side plate 252 protruding from the top surface of the bottom plate 251. The bottom plate 251 is installed on the end surface of the mounting boss 111, the high-voltage connector 23 is installed on the first side plate 252, and the second connecting hole 22 is arranged on the bottom plate 251. The structural arrangement is reasonable.

[0035] The annular bottom plate 251 is provided with a step 253 for supporting and installing the wiring baffle 3, and the step 253 is provided with a third mounting hole 254 corresponding to the second through hole 32. The wiring baffle 3 is fixed in the junction box 2 by screws passing through the second through hole 32 and lockingly connected with the third mounting hole 254. The structural arrangement is reasonable and the installation is convenient.

[0036] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A centrifugal air compressor, comprising a motor (1) and a terminal box (2), the motor (1) comprising a casing (11) and a stator assembly (12), a cavity (110) being provided in the casing (11), the stator assembly (12) being mounted in the cavity (110), a mounting boss (111) being provided on a side surface of the casing (11), a connecting hole (1111) being provided in the middle of the mounting boss (111) and being communicated with a first cavity (110), the terminal box (2) being mounted on the mounting boss (111), a second cavity (21) being provided in the terminal box (2), a second connecting hole (22) corresponding to the first connecting hole (1111) being provided at the bottom of the terminal box (2), a high-voltage connector (23) being provided on a side surface of the terminal box (2), a lead wire of the stator assembly passing through the first connecting hole (1111), the second connecting hole (22) and the second cavity (21) and being electrically connected to the high-voltage connector (23), characterized in that: A wiring baffle (3) is provided inside the terminal box (2), and a plurality of groups of through holes are provided on the wiring baffle (3), the plurality of groups of through holes comprising a plurality of first through holes (31), a plurality of second through holes (32) and a plurality of third through holes (33), the plurality of first through holes (31) are arranged in the middle of the wiring baffle (3), the plurality of second through holes (32) are arranged at the front and rear sides of the first through holes (31), and the plurality of third through holes (33) are arranged at the left and right sides of the first through holes (31), the plurality of first through holes (31) are used for allowing lead wires of the stator assembly (12) to pass through, the plurality of second through holes (32) are used for fixed installation with the terminal box (2), and the plurality of third through holes (33) are used for assisting in enhancing the fluidity of the airflow inside the terminal box (2).

2. A centrifugal air compressor according to claim 1, characterized in that: The plurality of groups of through holes also include a plurality of fourth through holes (34), the fourth through holes (34) being arranged at four corners of the wiring baffle (3), the bottom of the wiring box (2) being provided with a plurality of first mounting holes (24), the mounting boss (111) being provided with a plurality of second mounting holes (1112) corresponding to the first mounting holes (24), the wiring box (2) being fixed on the mounting boss (111) by screws passing through the first mounting holes (24) and cooperating and locking with the second mounting holes (1112), the screws corresponding to the positions of the fourth through holes (34) being used for screw mounting operations.

3. A centrifugal air compressor according to claim 1, characterized in that: The plurality of groups of through holes further include a fifth through hole (35), which is used to lead out a signal line of the stator assembly, and the fifth through hole (35) is located between the first through hole (31), the second through hole (32), the third through hole (33) and the fourth through hole (34).

4. A centrifugal air compressor according to claim 1, 2 or 3, characterized in that: The wiring baffle (3) is composed of two baffle plates (30) with the same structure.

5. A centrifugal air compressor according to claim 4, characterized in that: The wiring baffle (3) is made of non-metallic insulating material.

6. A centrifugal air compressor according to claim 4, characterized in that: The junction box (2) comprises a junction box body (25) and a cover plate (26); the junction box body (25) comprises a bottom plate (251) and a first side plate (252) protruding from the top surface of the bottom plate (251); the bottom plate (251) is mounted on the end surface of the mounting boss (111); the high-voltage connector (23) is mounted on the first side plate (252); and the second connection hole (22) is arranged on the bottom plate (251).

7. A centrifugal air compressor according to claim 6, characterized in that: The annular bottom plate (251) is provided with a step (253) for supporting and installing the wiring baffle (3); the step (253) is provided with a third mounting hole (254) corresponding to the second through hole (32); a screw is passed through the second through hole (32) and locked with the third mounting hole (254), so that the wiring baffle (3) is fixed in the junction box (2).

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