CN220754522U - Motor airtight outgoing line structure and Roots pump - Google Patents
Motor airtight outgoing line structure and Roots pump Download PDFInfo
- Publication number
- CN220754522U CN220754522U CN202322470272.5U CN202322470272U CN220754522U CN 220754522 U CN220754522 U CN 220754522U CN 202322470272 U CN202322470272 U CN 202322470272U CN 220754522 U CN220754522 U CN 220754522U
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- motor
- airtight
- sealing
- hole
- seat
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- 238000007789 sealing Methods 0.000 claims abstract description 94
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000003292 glue Substances 0.000 claims description 15
- 239000000565 sealant Substances 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 239000000741 silica gel Substances 0.000 claims description 6
- 229910002027 silica gel Inorganic materials 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model belongs to the technical field of Roots pumps, and particularly relates to a motor airtight outgoing line structure and a Roots pump. Aiming at the Roots pump with the existing pump shell and motor shell in sealing connection, how to solve the defect of airtight lead wire outgoing of a motor is not disclosed, the utility model adopts the following technical scheme: the airtight line outlet structure of motor includes: a motor shell, the circumferential side wall of which is provided with a wire outlet hole; the stator is arranged in the motor shell; the sealing seat is arranged around the wire outlet hole and is in airtight seal with the motor shell, and a seat hole is formed; the elastic piece is fixed on the sealing seat and is hermetically sealed with the sealing seat to form a sealing hole; the inner end of the lead wire is fixedly connected with the stator, and the outer end of the lead wire extends out of a wire outlet hole of the motor shell and a seat hole of the sealing seat; wherein, airtight seal is sealed between lead wire and the sealed hole. The motor airtight outgoing line structure has the beneficial effects that: and airtight outgoing lines are realized through tight fit between the lead wires and the sealing holes of the elastic pieces.
Description
Technical Field
The utility model belongs to the technical field of Roots pumps, and particularly relates to a motor airtight outgoing line structure and a Roots pump.
Background
The Roots vacuum pump is a vacuum pumping device with suction and exhaust functions, which is formed by a pair of 8-shaped rotors which are matched with each other and synchronously rotate at a high speed in a pump cavity formed by a pump body, a front end cover and a rear end cover, and small gaps are reserved among the rotors and between the rotors and the inner wall of the pump shell and are not contacted with each other. The driving rotor and the driven rotor respectively extend out of the pump cavity to be supported by the bearing, and synchronous reverse rotation of the driving rotor and the driven rotor is realized by gear transmission. The driving rotor is driven to rotate by a motor. The medium pumped in the pump cavity has different characteristics of corrosiveness, inflammability, explosiveness, easiness in crystallization and the like, the isolation between the pump cavity and the transmission parts on two sides is realized through sealing, and meanwhile, air is prevented from leaking into the pump cavity through sealing, so that the vacuum pumping performance is improved.
The Chinese patent publication No. CN 209875465U discloses a Roots pump, which comprises a vacuum pump and a motor, wherein the vacuum pump comprises a vacuum pump body shell and a pump rotor; the motor comprises a motor shell, a motor stator and a motor rotor; the first end of the vacuum pump body shell is connected with the first end of the motor shell in a sealing way; a rotor shaft is arranged in the pump rotor, and one end of the rotor shaft extends into the motor shell and penetrates through the motor rotor; the second end of the vacuum pump body shell and the second end of the motor shell are both provided with sealing structures.
In the utility model, the vacuum pump body shell and the motor shell are mutually connected in a sealing way, so that the sealing way of dynamic sealing between the existing rotor shaft and the vacuum pump body shell is replaced, the static sealing between the vacuum pump body shell and the motor shell is changed, and the sealing strength of the Roots pump is improved; the vacuum pump and the motor share one rotor shaft, so that the use of the coupling is reduced, the stability of connection is improved, and the noise and vibration caused by the use of the coupling are reduced. However, the sealed connection of the vacuum pump housing and the motor housing to each other presents a new problem: how the motor leads lead out from the motor housing and ensure tightness.
Disclosure of Invention
Aiming at the Roots pump with the existing pump body shell and the existing motor shell in sealing connection, how to solve the defect of airtight sealing of the lead outgoing line of the motor is not disclosed, an airtight outgoing line structure of the motor is provided, and airtight outgoing line of the lead is realized. The utility model also provides a Roots pump adopting the motor airtight outgoing line structure
In order to achieve the above purpose, the utility model adopts the following technical scheme: the airtight outgoing line structure of motor, airtight outgoing line structure of motor includes:
a motor shell, the circumferential side wall of which is provided with a wire outlet hole;
the stator is arranged in the motor shell;
the sealing seat is arranged around the wire outlet hole and is in airtight seal with the motor shell, and a seat hole is formed;
the elastic piece is fixed on the sealing seat and is hermetically sealed with the sealing seat, and a sealing hole is formed;
the inner end of the lead wire is fixedly connected with the stator, and the outer end of the lead wire extends out of a wire outlet hole of the motor shell and a seat hole of the sealing seat;
wherein, airtight seal is sealed between lead wire and the sealed hole.
According to the motor airtight outgoing line structure, the outgoing line hole is formed in the motor shell, the sealing seat and the elastic piece are arranged, the elastic piece is fixed on the sealing seat, the sealing hole is formed in the airtight elastic piece between the elastic piece and the sealing seat, and airtight outgoing line is achieved through tight fit between the lead and the sealing hole of the elastic piece. In order to prevent the elastic piece from deforming due to too low air pressure in the motor shell in the working process, the inner side of the elastic piece can be filled with glue or provided with a limiting piece so as to prevent or limit the deformation of the elastic piece. The leads may be provided with an airtight lead or an additional airtight structure at the outer ends of the leads to prevent air from entering the motor through the inside of the leads.
As an improvement, the stator is a glue-pouring stator, and the inner end of the lead is glue-poured.
As an improvement, glue is filled in the wire outlet hole and the seat hole, and the inner side of the elastic piece is contacted with the end face of the pouring sealant.
As an improvement, the inner side of the elastic piece is provided with a rigid plate, and the inner side of the elastic piece is contacted with the rigid plate.
As an improvement, the elastic piece is a silica gel pad, a plurality of sealing holes are formed in the silica gel pad, and a plurality of leads are arranged.
As an improvement, the motor airtight outgoing line structure further comprises a compression ring arranged on the outer side of the sealing seat, and the compression ring compresses the edge of the elastic element and enables the elastic element to be airtight with the sealing seat.
As an improvement, the seat hole comprises a large-diameter section at the outer end and a small-diameter section at the inner end, and the elastic piece is positioned in the large-diameter section.
As an improvement, the elastic piece is fixedly connected with the sealing seat through a screw, the screw is used for fixedly connecting the sealing seat with the motor shell, and a sealing ring is arranged between the sealing seat and the motor shell.
As an improvement, the lead is an airtight cable comprising an outer insulating layer, a plurality of metal wires and a filled airtight glue that hermetically seals between the metal wires and the insulating layer.
As an improvement, the inner end of the lead wire is welded and fixed with the stator.
The Roots pump comprises a motor and a pump body, wherein the motor comprises a motor shell, the pump body comprises a pump body shell, the motor shell is in sealing connection with the pump body shell, and the Roots pump further comprises the motor airtight outgoing line structure.
The motor airtight outgoing line structure has the beneficial effects that: the wire outlet hole is formed in the motor shell, the sealing seat and the elastic piece are arranged, the elastic piece is fixed on the sealing seat, the sealing hole is formed between the elastic piece and the sealing seat, and airtight wire outlet is realized through tight fit between the lead wire and the sealing hole of the elastic piece.
The Roots pump provided by the utility model adopts the motor airtight outlet structure, and has all the beneficial effects of the motor airtight outlet structure.
Drawings
Fig. 1 is a cross-sectional view of a Roots pump according to a first embodiment of the present utility model.
Fig. 2 is a cross-sectional view of a motor airtight outlet structure of a Roots pump according to an embodiment of the present utility model.
Fig. 3 is a cross-sectional view of a lead wire of a Roots pump according to a first embodiment of the present utility model.
Fig. 4 is a cross-sectional view of a motor airtight outlet structure of a Roots pump according to a second embodiment of the present utility model.
In the figure, 1, a pump body shell;
2. a motor housing; 21. a wire outlet hole;
3. a stator; 31. pouring sealant;
4. a sealing seat; 41. a seat hole; 411. a small diameter section; 412. a large diameter section;
5. an elastic member; 51. sealing the hole;
6. a lead wire; 61. an insulating layer; 62. a metal wire; 63. an airtight adhesive;
7. a clamp ring;
8. a screw;
9. a seal ring;
10. a rigid plate.
Detailed Description
The following description of the technical solutions of the inventive embodiments of the present utility model is provided only for the preferred embodiments of the utility model, but not all. Based on the examples in the implementation manner, other examples obtained by a person skilled in the art without making any inventive effort fall within the scope of protection created by the present utility model.
Referring to fig. 1 to 4, the motor airtight outlet structure according to the embodiment of the present utility model includes:
a motor shell, the circumferential side wall of which is provided with a wire outlet hole;
the stator is arranged in the motor shell;
the sealing seat is arranged around the wire outlet hole and is in airtight seal with the motor shell, and a seat hole is formed;
the elastic piece is fixed on the sealing seat and is hermetically sealed with the sealing seat, and a sealing hole is formed;
the inner end of the lead wire is fixedly connected with the stator, and the outer end of the lead wire extends out of a wire outlet hole of the motor shell and a seat hole of the sealing seat;
wherein, airtight seal is sealed between lead wire and the sealed hole.
According to the motor airtight outgoing line structure, the outgoing line hole is formed in the motor shell, the sealing seat and the elastic piece are arranged, the elastic piece is fixed on the sealing seat, the sealing hole is formed in the airtight elastic piece between the elastic piece and the sealing seat, and airtight outgoing line is achieved through tight fit between the lead and the sealing hole of the elastic piece. In order to prevent the elastic piece from deforming due to too low air pressure in the motor shell in the working process, the inner side of the elastic piece can be filled with glue or provided with a limiting piece so as to prevent or limit the deformation of the elastic piece. The leads may be provided with an airtight lead or an additional airtight structure at the outer ends of the leads to prevent air from entering the motor through the inside of the leads.
Example 1
Referring to fig. 1 to 3, in a motor airtight outlet structure according to a first embodiment of the present utility model, the motor airtight outlet structure includes:
a motor housing 2, the circumferential side wall of which is provided with a wire outlet hole 21;
a stator 3 provided in the motor housing 2;
the sealing seat 4 is arranged around the wire outlet hole 21 and is hermetically sealed with the motor shell 2, and a seat hole 41 is formed;
an elastic element 5 fixed on the sealing seat 4 and airtight sealed with the sealing seat 4, and provided with a sealing hole 51;
the inner end of the lead wire 6 is fixedly connected with the stator 3, and the outer end extends out of the wire outlet hole 21 of the motor shell 2 and the seat hole 41 of the sealing seat 4;
wherein, the lead 6 and the sealing hole 51 are hermetically sealed.
In this embodiment, the circumferential side wall of the motor housing 2 has a planar portion on which the wire outlet hole 21 is opened.
In this embodiment, the inner end of the lead wire 6 is welded to the stator 3.
In this embodiment, the stator 3 is a glue-filled stator 3, and the inner end of the lead 6 is glue-filled.
In this embodiment, the wire hole 21 and the seat hole 41 are filled with glue, and the inner side of the elastic member 5 is in contact with the end surface of the potting adhesive 31. When the stator 3 is filled with glue, the wire outlet hole 21 is completely filled, the seat hole 41 of the sealing seat 4 is also partially filled, and the inner side of the elastic piece 5 is in contact with the end face of the pouring sealant 31, so that when the Roots pump works, after negative pressure is generated in the motor shell 2, the end face of the pouring sealant 31 prevents or limits the deformation of the elastic piece 5, thereby preventing or limiting the deformation of the elastic piece 5, and ensuring the sealing between the elastic piece 5 and the lead 6. The inner side of the elastic piece 5 is contacted with the end face of the pouring sealant 31, or the inner side of the elastic piece 5 is attached to the pouring sealant surface, or the gap between the inner side of the elastic piece 5 and the end face of the pouring sealant 31 is small.
In this embodiment, the elastic member 5 is a silica gel pad, a plurality of sealing holes 51 are formed in the silica gel pad, and a plurality of leads 6 are provided. Specifically, in the present embodiment, there are three leads 6. The number of leads may be other in other embodiments.
In this embodiment, the motor airtight outlet structure further includes a compression ring 7 disposed at the outer side of the sealing seat 4, where the compression ring 7 compresses the edge of the elastic element 5 and makes the elastic element 5 airtight with the sealing seat 4.
In this embodiment, the seat hole 41 includes a large diameter section 412 at an outer end and a small diameter section 411 at an inner end, and the elastic member 5 is located in the large diameter section 412. The large-diameter section 412 positions the elastic piece 5, so that the installation is convenient, and the side wall of the large-diameter section 412 also limits the deformation of the elastic piece 5 in the length-width direction.
In this embodiment, the thickness of the elastic member 5 when uncompressed is greater than the depth of the large diameter section 412.
In this embodiment, the elastic member 5 is fixedly connected with the sealing seat 4 through a screw 8, the screw 8 also fixes the sealing seat 4 with the motor housing 2, and a sealing ring 9 is disposed between the sealing seat 4 and the motor housing 2.
In other embodiments, the seal holder 4 may also be welded and sealed to the motor housing 2.
In this embodiment, the motor housing 2 is provided with a screw hole. Four threaded holes and four screws 8.
In this embodiment, the inner end surface of the sealing seat 4 is provided with a sealing groove, and the sealing ring 9 is arranged in the sealing groove. The seal groove is located in the area between the threaded holes.
In this embodiment, a flat washer and a spring washer are further provided at the screw 8.
In this embodiment, the lead 6 is an airtight cable, and the airtight cable includes an outer insulating layer 61, a plurality of metal wires 62, and a filled airtight adhesive 63, and the airtight adhesive 63 seals the metal wires 62 and the insulating layer 61. The lead wire 6 adopts a multi-core wire, which is convenient for connection. The lead wire 6 has an airtight glue 63 to ensure that gas does not enter the motor from inside the lead wire 6.
In other embodiments, additional hermetic structures may be provided at the outer ends of the leads 6.
The Roots pump comprises a motor and a pump body, wherein the motor comprises a motor shell 2, the pump body comprises a pump body shell, the motor shell 2 is in sealing connection with the pump body shell 1, and the motor shell 2 is provided with the motor airtight outlet structure.
The motor airtight outgoing line structure has the beneficial effects that: the motor casing 2 is provided with a wire outlet hole 21, a sealing seat 4 and an elastic element 5, the elastic element 5 is fixed on the sealing seat 4, a sealing hole 51 is formed between the elastic element 5 and the sealing seat 4, and airtight wire outlet is realized through tight fit between a lead 6 and the sealing hole 51 of the elastic element 5; the inner side of the elastic piece 5 is provided with a device for preventing or limiting the deformation of the elastic piece 5 caused by the negative pressure in the motor shell 2, so that the sealing between the elastic piece 5 and the lead 6 is ensured; the structure for preventing or limiting the deformation of the elastic member 5 is formed when the stator 3 is filled with glue, and no additional rigid plate 10 or the like is required.
Example two
Referring to fig. 4, in the present embodiment, the inner side of the elastic member 5 is provided with a rigid plate 10, the rigid plate 10 contacts the inner side of the elastic member 5, and the rigid plate 10 prevents or limits the deformation of the elastic member 5. The rigid plate 10 is also mounted in the large diameter section 412 of the seal housing 4.
In this embodiment, a separate rigid plate 10 is provided to prevent or limit deformation of the elastic member 5, and the requirement for glue filling of the stator 3 is reduced.
The embodiment of the utility model also provides a Roots pump, which comprises a motor and a pump body, wherein the motor comprises a motor shell 2, the pump body comprises a pump body shell 1, the motor shell 2 is in sealing connection with the pump body shell 1, and the Roots pump also comprises the motor airtight outgoing line structure.
While the utility model has been described in terms of specific embodiments, it will be apparent to those skilled in the art that the utility model is not limited to the specific embodiments described. Any modifications which do not depart from the functional and structural principles of the present utility model are intended to be included within the scope of the appended claims.
Claims (10)
1. The airtight line outlet structure of motor, its characterized in that: the airtight outlet structure of motor includes:
a motor housing (2), the circumferential side wall of which is provided with a wire outlet hole (21);
a stator (3) provided in the motor housing (2);
the sealing seat (4) is arranged around the wire outlet hole (21) and is in airtight seal with the motor shell (2), and a seat hole (41) is formed;
an elastic element (5) fixed on the sealing seat (4) and hermetically sealed with the sealing seat (4), and provided with a sealing hole (51);
the inner end of the lead wire (6) is fixedly connected with the stator (3), and the outer end of the lead wire extends out of a wire outlet hole (21) of the motor shell (2) and a seat hole (41) of the sealing seat (4);
wherein, the lead (6) and the sealing hole (51) are hermetically sealed.
2. The motor hermetic seal wire outlet structure according to claim 1, wherein: the stator (3) is a glue-pouring stator (3), glue is poured into the inner end of the lead (6), glue is poured into the wire outlet hole (21) and the seat hole (41), and the inner side of the elastic piece (5) is in end face contact with the pouring sealant (31).
3. The motor hermetic seal wire outlet structure according to claim 1, wherein: the inner side of the elastic piece (5) is provided with a rigid plate (10), and the inner side of the elastic piece (5) is contacted with the rigid plate (10).
4. The motor hermetic seal wire outlet structure according to claim 1, wherein: the elastic piece (5) is a silica gel pad, a plurality of sealing holes (51) are formed in the silica gel pad, and a plurality of leads (6) are arranged.
5. The motor hermetic seal wire outlet structure according to claim 1, wherein: the motor airtight outgoing line structure further comprises a compression ring (7) arranged on the outer side of the sealing seat (4), and the compression ring (7) compresses the edge of the elastic element (5) and enables the elastic element (5) to be airtight with the sealing seat (4).
6. The motor hermetic seal wire outlet structure according to claim 5, wherein: the seat hole (41) comprises a large-diameter section (412) at the outer end and a small-diameter section (411) at the inner end, and the elastic piece (5) is positioned in the large-diameter section (412).
7. The motor hermetic seal wire outlet structure according to claim 5, wherein: the elastic piece (5) is fixedly connected with the sealing seat (4) through a screw (8), the screw (8) is used for fixedly connecting the sealing seat (4) with the motor shell (2), and a sealing ring (9) is arranged between the sealing seat (4) and the motor shell (2).
8. The motor hermetic seal wire outlet structure according to claim 1, wherein: the lead (6) is an airtight cable, the airtight cable comprises an outer insulating layer (61), a plurality of metal wires (62) and airtight glue (63), and the airtight glue (63) seals the metal wires (62) and the insulating layer (61) in an airtight mode.
9. The motor hermetic seal wire outlet structure according to claim 1, wherein: the inner end of the lead wire (6) is welded and fixed with the stator (3).
10. Roots pump, including motor and pump body, the motor includes motor housing (2), and the pump body includes pump body shell (1), motor housing (2) and pump body shell (1) sealing connection, its characterized in that: the roots pump further comprising the motor airtight line outlet structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322470272.5U CN220754522U (en) | 2023-09-12 | 2023-09-12 | Motor airtight outgoing line structure and Roots pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322470272.5U CN220754522U (en) | 2023-09-12 | 2023-09-12 | Motor airtight outgoing line structure and Roots pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220754522U true CN220754522U (en) | 2024-04-09 |
Family
ID=90562983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322470272.5U Active CN220754522U (en) | 2023-09-12 | 2023-09-12 | Motor airtight outgoing line structure and Roots pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220754522U (en) |
-
2023
- 2023-09-12 CN CN202322470272.5U patent/CN220754522U/en active Active
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