CN210889434U - Fan shaft of transformer substation - Google Patents

Fan shaft of transformer substation Download PDF

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Publication number
CN210889434U
CN210889434U CN201921760335.8U CN201921760335U CN210889434U CN 210889434 U CN210889434 U CN 210889434U CN 201921760335 U CN201921760335 U CN 201921760335U CN 210889434 U CN210889434 U CN 210889434U
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China
Prior art keywords
piece
shaft
spindle nose
threaded
clamping
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Active
Application number
CN201921760335.8U
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Chinese (zh)
Inventor
刘西波
胡志辉
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Fenghua Kesheng Micro Shaft Co ltd
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Fenghua Kesheng Micro Shaft Co ltd
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Abstract

The utility model relates to a shaft field, concretely relates to transformer substation's fan axle, including first spindle nose, first connecting piece, the jackshaft, second connecting piece and second spindle nose, first spindle nose and second spindle nose are solid structure, the jackshaft is hollow structure, first spindle nose and second spindle nose hot pressing respectively are installed at the both ends of jackshaft, first connecting piece and second connecting piece threaded mounting respectively are at the both ends of jackshaft, first connecting piece sets up the junction at first spindle nose and jackshaft, the second connecting piece sets up the junction at jackshaft and second spindle nose, the adjacent terminal surface joint of first spindle nose and first connecting piece, the adjacent terminal surface joint of second connecting piece and second spindle nose; the shaft has light weight, reduces the load of the bearing, prolongs the service life of the bearing, and has simple production, processing and assembly processes and lower cost.

Description

Fan shaft of transformer substation
Technical Field
The utility model relates to an axle field, concretely relates to fan axle of transformer substation.
Background
The ventilation system of the underground transformer substation has two forms, one is direct ventilation, adopts an axial flow fan, and is not provided with a centralized fan room; the other type is centralized ventilation, and a centrifugal fan is adopted and is introduced into a fan room through an air pipeline. A ventilation system of an underground substation selects a fan from required air volume and air pressure, and the operation working condition of a centrifugal fan is superior to that of an axial flow fan. In 220KV underground transformer substation of Wangfu well in Beijing and 110KV underground transformer substation of State trade, the fan used in the ventilation system is a centrifugal fan.
At present, the main shafts of domestic centrifugal blowers are all solid steel shafts, and the blank of the main shaft adopts forged pieces or hot rolled bar materials; the main characteristics are as follows: the processing technology is simple, the material consumption is high, the weight of the main shaft is heavy, and the bearing load is large. As the multistage centrifugal blower increases in number of stages due to the increase in pressure ratio, the corresponding support center span and the main shaft length also increase. Meanwhile, because of the design requirement of the critical rotating speed of the rotor, the large-span main shaft has enough rigidity; the commonly adopted measure for this purpose is to increase the shaft diameter; thus the weight of the main shaft is greatly increased. For the machine type adopting the rolling bearing structure, the bearing load is increased, the service life of the bearing is shortened, and a series of problems are caused.
Chinese patent CN202612186U discloses a hollow main shaft structure of a double-support multistage centrifugal blower. Including left axle head section, jackshaft, right axle head section, its characterized in that: the middle shaft and the left shaft head section are of hollow structures, the right shaft head section is of a solid structure, and the transmission end is arranged at the right shaft head section. In order to ensure the dynamic balance precision of the main shaft, a main shaft dynamic balance part is designed at the left shaft head section, and static/dynamic balance is carried out by adopting a weight removing method. Under the condition of equal rigidity and equal torque transmission, the main shaft of the utility model has a weight reduction of 25 to 30 percent compared with a solid shaft with the same overall dimension.
The production and processing technology of the shaft is complex, and particularly, the shaft is made of special materials and is not easy to weld, a high-grade welder or automatic welding equipment is needed, and the welding cost is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a transformer substation's fan axle, this axle weight is light, has reduced the load of bearing, the life-span of the bearing of extension to production, processing and equipment simple process, the cost is lower.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a transformer substation's fan axle, including first spindle nose, first connecting piece, the jackshaft, second connecting piece and second spindle nose, first spindle nose and second spindle nose are solid construction, the jackshaft is hollow structure, first spindle nose and second spindle nose hot pressing respectively are installed at the both ends of jackshaft, first connecting piece and second connecting piece are threaded respectively and are installed at the both ends of jackshaft, first connecting piece sets up the junction at first spindle nose and jackshaft, the second connecting piece sets up the junction at jackshaft and second spindle nose, the adjacent terminal surface joint of first spindle nose and first connecting piece, the adjacent terminal surface joint of second connecting piece and second spindle nose.
As an optimal scheme of a transformer substation fan axle, the jackshaft is including coaxial and first screw thread section, polished rod section, the second screw thread section of connecting in proper order, and first screw thread section, polished rod section, second screw thread section internal diameter are the same, and first screw thread section, second screw thread section external diameter are the same, and the external diameter of first screw thread section, second screw thread section all is less than the external diameter of polished rod section, first connecting piece and first screw thread section threaded connection, second connecting piece and second screw thread section threaded connection.
As a preferred scheme of a transformer substation fan shaft, a first shaft head and a second shaft head are identical in structure, the first shaft head comprises a transmission section, a sealing section, a connecting section, a third thread section, a bearing section, a first clamping section and a hot pressing section which are coaxial and sequentially connected, and a first connecting piece comprises a second clamping section and a fourth thread section which are coaxial and sequentially connected;
the hot pressing section is in interference fit with the intermediate shaft, the first clamping section is clamped with the second clamping section, and the fourth thread section is in thread fit with the first thread section.
As an optimal scheme of the transformer substation fan shaft, the diameters of the transmission section, the sealing section, the connecting section, the third thread section, the bearing section and the first clamping section are gradually increased in sequence.
As an optimal scheme of a transformer substation fan axle, the second joint section is the cyclic annular rack that the tooth end set up towards first joint section, is provided with on the first joint section with the equal spline groove of joint of every tooth on the second joint section.
As a preferred scheme of the transformer substation fan shaft, a key groove is formed in the transmission section.
As a preferred scheme of the transformer substation fan shaft, an annular sealing ring groove coaxial with the sealing section is arranged on the sealing section.
As a preferred scheme of the transformer substation fan shaft, a plurality of square grooves which are uniformly distributed around the axis of the fourth threaded section are formed in the outer circumferential surface of the fourth threaded section.
The utility model has the advantages that:
the first shaft head and the second shaft head are in interference fit with the inner wall of the intermediate shaft and are installed through hot pressing, so that the first shaft head, the intermediate shaft and the second shaft head are combined into a hollow shaft, radial vibration of the first shaft head and the second shaft head relative to the intermediate shaft is eliminated through interference fit, as the first connecting piece and the second connecting piece are both installed on the intermediate shaft in a threaded manner and are respectively clamped with the first shaft head and the second shaft head, when the rotating direction of the shaft is equal to the screwing direction of the threads of the first connecting piece and the second connecting piece, the axial rotating motion of the first shaft head and the second shaft head relative to the intermediate shaft is limited through the first connecting piece and the second connecting piece, and further the first shaft head, the first connecting piece, the intermediate shaft, the second connecting piece and the second shaft head are combined into a hollow shaft without relative radial vibration and rotating motion inside, the method is suitable for large-scale equipment such as a transformer substation fan.
1. Compared with a solid shaft, the shaft is lighter in weight, the load of the bearing is reduced, and the service life of the bearing is prolonged;
2. the shaft has simple production, processing and assembly processes and lower cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a radial view of a transformer station fan shaft according to an embodiment of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
fig. 3 is an exploded rear radial view of a transformer substation fan shaft according to an embodiment of the present invention;
fig. 4 is an exploded rear perspective view of a transformer substation fan shaft according to an embodiment of the present invention;
fig. 5 is a first axial head perspective view of a transformer substation fan shaft according to an embodiment of the present invention;
fig. 6 is a perspective view of a first connecting member of a fan shaft of a transformer substation according to an embodiment of the present invention;
in the figure:
1. a first spindle nose; 1a, a transmission section; 1a1, keyway; 1b, a sealing section; 1b1, seal ring groove; 1c, a connecting section; 1d, a third thread section; 1e, a bearing section; 1f, a first clamping section; 1f1, spline grooves; 1g, hot pressing section;
2. a first connecting member; 2a, a second clamping section; 2b, a fourth thread section; 2b1, groove;
3. an intermediate shaft; 3a, a first thread section; 3b, a polished rod section; 3c, a second thread section;
4. a second connecting member;
5. and a second spindle head.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used only for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms will be understood by those skilled in the art according to the specific circumstances.
In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being either a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 6, a transformer substation fan axle that shows, including first spindle nose 1, first connecting piece 2, jackshaft 3, second connecting piece 4 and second spindle nose 5, first spindle nose 1 and second spindle nose 5 are solid structure, jackshaft 3 is hollow structure, first spindle nose 1 and second spindle nose 5 hot pressing respectively install at the both ends of jackshaft 3, first connecting piece 2 and second connecting piece 4 are threaded respectively and are installed at the both ends of jackshaft 3, first connecting piece 2 sets up the junction at first spindle nose 1 and jackshaft 3, second connecting piece 4 sets up the junction at jackshaft 3 and second spindle nose 5, the adjacent terminal surface joint of first spindle nose 1 and first connecting piece 2, the adjacent terminal surface joint of second connecting piece 4 and second spindle nose 5.
The first shaft head 1 and the second shaft head 5 are in interference fit with the inner wall of the intermediate shaft 3 and are installed through hot pressing, so that the first shaft head 1, the intermediate shaft 3 and the second shaft head 5 are combined into a hollow shaft, and the first shaft head 1,
The second shaft head 5 is eliminated through interference fit relative to the radial vibration of the intermediate shaft 3, because the first connecting piece 2 and the second connecting piece 4 are installed on the intermediate shaft 3 in a threaded mode, the first connecting piece 2 and the second connecting piece 4 are respectively connected with the first shaft head 1 and the second shaft head 5 in a clamped mode, when the rotating direction of the shaft is equal to the screwing direction of the threads of the first connecting piece 2 and the second connecting piece 4, the axial rotating motion of the first shaft head 1 and the second shaft head 5 relative to the intermediate shaft 3 is limited through the first connecting piece 2 and the second connecting piece 4, the first shaft head 1, the first connecting piece 2, the intermediate shaft 3, the second connecting piece 4 and the second shaft head 5 are combined into a hollow shaft without relative radial vibration and rotating motion inside, and the hollow shaft is suitable for large-scale equipment such.
The intermediate shaft 3 is including coaxial and the first screw thread section 3a of connecting in proper order, polished rod section 3b, second screw thread section 3c, first screw thread section 3a, polished rod section 3b, the second screw thread section 3c internal diameter is the same, first screw thread section 3a, the second screw thread section 3c external diameter is the same, first screw thread section 3a, the external diameter of second screw thread section 3c all is less than the external diameter of polished rod section 3b, first connecting piece 2 and first screw thread section 3a threaded connection, second connecting piece 4 and second screw thread section 3c threaded connection.
The first connecting piece 2 and the second connecting piece 4 are respectively installed on the first thread section 3a and the second thread section 3c in a threaded mode, when installation is completed, the adjacent end faces of the first connecting piece 2, the second connecting piece 4 and the intermediate shaft 3 abut against the two end faces of the polished rod section 3b, and the two end faces of the polished rod section 3b play a role in stopping rotation of the first connecting piece 2 and the second connecting piece 4.
The first shaft head 1 and the second shaft head 5 are identical in structure, the first shaft head 1 comprises a transmission section 1a, a sealing section 1b, a connecting section 1c, a third thread section 1d, a bearing section 1e, a first clamping section 1f and a hot pressing section 1g which are coaxial and connected in sequence, and the first connecting piece 2 comprises a second clamping section 2a and a fourth thread section 2b which are coaxial and connected in sequence;
hot pressing section 1g and 3 interference fit of intermediate shaft, first joint section 1f and the joint of second joint section 2a, fourth screw thread section 2b and the screw-thread fit of first screw thread section 3 a.
Firstly, the first connecting piece 2 is screwed at one end of the intermediate shaft 3 through the thread matching of the fourth thread section 2b and the first thread section 3a, then the first shaft head 1 is hot-pressed on the intermediate shaft 3 through the interference matching of the hot pressing section 1g and the intermediate shaft 3, the first clamping section 1f and the second clamping section 2a are aligned to complete clamping, and similarly, the second connecting piece 4 and the second shaft head 5 are also assembled in the same sequence and method.
The diameters of the transmission section 1a, the sealing section 1b, the connecting section 1c, the third thread section 1d, the bearing section 1e and the first clamping section 1f are gradually increased in sequence.
The third thread section 1d is used for installing a round nut, the bearing section 1e is used for installing a bearing, and two end faces of the bearing are fixed through the end face of the round nut and the end face of the first clamping section 1f, so that the diameter of the first clamping section 1f is larger than that of the bearing section 1e, and meanwhile, in order to facilitate the installation of the bearing and the round nut, the diameter of the bearing section 1e is larger than that of the third thread section 1d, and the diameter of the third thread section 1d is larger than that of the transmission section 1a, the sealing section 1b and the connecting section 1 c.
The second clamping section 2a is an annular rack with a tooth end arranged towards the first clamping section 1f, and the first clamping section 1f is provided with a spline groove 1f1 clamped with each tooth on the second clamping section 2 a.
When first spindle nose 1 and jackshaft 3 joint, aim at every tooth on the second joint section 2a with spline groove 1f1 and then heat pressing section 1g in the inner circle of jackshaft 3, can make first joint section 1f and second joint section 2a accomplish the joint.
The transmission section 1a is provided with a key groove 1a 1.
The key way 1a1 is used for mounting a key so that the transmission segment 1a can transmit torque.
The seal segment 1b is provided with an annular seal ring groove 1b1 coaxial with the seal segment 1 b.
The connecting section 1c plays a role in connecting the sealing section 1b with the third thread section 1d, the sealing ring groove 1b1 is used for installing a sealing ring, and the outer diameter of the sealing ring is larger than that of the connecting section 1c, so that a good sealing effect can be achieved.
The outer circumferential surface of the fourth thread segments 2b is provided with a plurality of square grooves 2b1 uniformly distributed around the axis of the fourth thread segments 2 b.
The recess 2b1 is intended to receive the working end of a wrench so that the wrench can easily transmit torque to the fourth thread section 2b, thereby enabling the first connecting piece 2 to be screwed more easily onto the intermediate shaft 3.
The utility model discloses a theory of operation:
a worker tightly clamps the groove 2b1 through a wrench, screws the fourth thread section 2b on the first thread section 3a, simultaneously enables the second clamping section 2a to face outwards, then presses the hot pressing section 1g into the inner ring of the intermediate shaft 3 through hot pressing, and aligns the spline groove 1f1 to each tooth on the second clamping section 2a during hot pressing, so that the first clamping section 1f and the second clamping section 2a can be clamped, and the second connecting piece 4 and the second shaft head 5 are assembled in the same sequence and by the same method;
the third thread section 1d is used for mounting a round nut, the bearing section 1e is used for mounting a bearing, and two end faces of the bearing are fixed with the end face of the first clamping section 1f through the end face of the round nut; the key groove 1a1 is used for installing a key, so that the transmission section 1a can transmit torque, the connecting section 1c is used for connecting the sealing section 1b and the third thread section 1d, and the sealing ring groove 1b1 is used for installing a sealing ring;
the first shaft head 1, the intermediate shaft 3 and the second shaft head 5 are combined into a hollow shaft, the first shaft head 1 and the second shaft head 5 are eliminated through interference fit relative to radial vibration of the intermediate shaft 3, when the rotating direction of the shaft is equal to the screwing direction of the threads of the first connecting piece 2 and the second connecting piece 4, the first shaft head 1 and the second shaft head 5 are limited by the first connecting piece 2 and the second connecting piece 4 relative to the axial rotating motion of the intermediate shaft 3, and further the first shaft head 1, the first connecting piece 2, the intermediate shaft 3, the second connecting piece 4 and the second shaft head 5 are combined into a hollow shaft without relative radial vibration and rotating motion inside, and the hollow shaft is suitable for large-scale equipment such as a transformer substation fan.
It should be understood that the above-described embodiments are merely illustrative of the preferred embodiments of the present invention and the technical principles thereof. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, these modifications are within the scope of the present invention as long as they do not depart from the spirit of the present invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.

Claims (8)

1. A transformer substation fan shaft is characterized by comprising a first shaft head (1) and a first connecting piece (2), jackshaft (3), second connecting piece (4) and second spindle nose (5), first spindle nose (1) and second spindle nose (5) are solid construction, jackshaft (3) are hollow structure, the both ends in jackshaft (3) are installed in hot pressing respectively in first spindle nose (1) and second spindle nose (5), first connecting piece (2) and second connecting piece (4) are the both ends of threaded mounting in jackshaft (3) respectively, first connecting piece (2) set up the junction at first spindle nose (1) and jackshaft (3), second connecting piece (4) set up the junction at jackshaft (3) and second spindle nose (5), the adjacent terminal surface joint of first spindle nose (1) and first connecting piece (2), the adjacent terminal surface joint of second connecting piece (4) and second spindle nose (5).
2. The transformer substation fan shaft according to claim 1, wherein the intermediate shaft (3) comprises a first threaded section (3a), a polished rod section (3b) and a second threaded section (3c) which are coaxial and connected in sequence, the inner diameters of the first threaded section (3a), the polished rod section (3b) and the second threaded section (3c) are the same, the outer diameters of the first threaded section (3a) and the second threaded section (3c) are smaller than the outer diameter of the polished rod section (3b), the first connecting piece (2) is in threaded connection with the first threaded section (3a), and the second connecting piece (4) is in threaded connection with the second threaded section (3 c).
3. The transformer substation fan shaft according to claim 2, characterized in that the first shaft head (1) and the second shaft head (5) are identical in structure, the first shaft head (1) comprises a transmission section (1a), a sealing section (1b), a connecting section (1c), a third thread section (1d), a bearing section (1e), a first clamping section (1f) and a hot pressing section (1g) which are coaxial and sequentially connected, and the first connecting piece (2) comprises a second clamping section (2a) and a fourth thread section (2b) which are coaxial and sequentially connected;
the hot pressing section (1g) is in interference fit with the intermediate shaft (3), the first clamping section (1f) is clamped with the second clamping section (2a), and the fourth thread section (2b) is in thread fit with the first thread section (3 a).
4. The transformer substation fan shaft according to claim 3, characterized in that the diameters of the transmission section (1a), the sealing section (1b), the connecting section (1c), the third threaded section (1d), the bearing section (1e) and the first clamping section (1f) gradually increase in sequence.
5. The transformer substation fan shaft of claim 3, wherein the second clamping section (2a) is an annular rack with a tooth end arranged towards the first clamping section (1f), and the first clamping section (1f) is provided with a spline groove (1f1) clamped with each tooth on the second clamping section (2 a).
6. The substation fan shaft according to claim 1, wherein the transmission section (1a) is provided with a key slot (1a 1).
7. The substation fan shaft according to claim 1, wherein the sealing section (1b) is provided with an annular sealing ring groove (1b1) coaxial with the sealing section (1 b).
8. The substation fan shaft according to claim 1, wherein the outer circumferential surface of the fourth threaded section (2b) is provided with a plurality of square grooves (2b1) uniformly distributed around the axis of the fourth threaded section (2 b).
CN201921760335.8U 2019-10-18 2019-10-18 Fan shaft of transformer substation Active CN210889434U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921760335.8U CN210889434U (en) 2019-10-18 2019-10-18 Fan shaft of transformer substation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921760335.8U CN210889434U (en) 2019-10-18 2019-10-18 Fan shaft of transformer substation

Publications (1)

Publication Number Publication Date
CN210889434U true CN210889434U (en) 2020-06-30

Family

ID=71340254

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921760335.8U Active CN210889434U (en) 2019-10-18 2019-10-18 Fan shaft of transformer substation

Country Status (1)

Country Link
CN (1) CN210889434U (en)

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