CN212028473U - Gear box of multistage turbine fan - Google Patents
Gear box of multistage turbine fan Download PDFInfo
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- CN212028473U CN212028473U CN202020523002.XU CN202020523002U CN212028473U CN 212028473 U CN212028473 U CN 212028473U CN 202020523002 U CN202020523002 U CN 202020523002U CN 212028473 U CN212028473 U CN 212028473U
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Abstract
The utility model discloses a machine case to current multistage fan often packs impeller or turbine into quick-witted incasement portion, the phenomenon of stall or surge appears when the fan, and when the flow of ventilating of local vacuum component actual operation is bigger than normal, multistage turbine fan can be because associative between at different levels again, the phenomenon that the complete machine vacuum is lower than normal can appear, still can cause the sharp decline of turbine fan performance when serious, the "jam" operating mode appears, and the gear box of multistage turbine fan of installing the fan in the case outside is provided, make things convenient for the fan to overhaul when breaking down. A gearbox for a multi-stage turbofan, comprising: box, case lid, the box include: the main gear groove, the auxiliary gear groove, the rotating shaft bearing groove, the main gear shaft front side mounting groove, the speed measuring tooth placing groove, the speed measuring tooth bearing bush groove and the box body sealing groove.
Description
Technical Field
The utility model relates to a centrifugal fan, concretely relates to multistage turbofan's gear box.
Background
Modern paper machines utilize vacuum to assist in dewatering the paper sheet, and thus the vacuum system is an important component of a paper machine. A plurality of vacuum elements with different vacuum degree requirements on a paper machine are required to be connected to a vacuum system. The vacuum system is constructed by selecting the turbo fans, and only one or two or three turbo fans are needed, so that the vacuum system of a large paper machine can be constructed.
The working principle of the turbine fan is that the interaction between the blades and gas is utilized, the impeller rotates at high speed, the gas pressure and the kinetic energy are improved, and the airflow is decelerated by utilizing the sequential through-flow elements, so that the kinetic energy is converted into the pressure improvement. Multiple stages of combined compression are typically used to achieve the final desired pressure. When used as a vacuum generator, the final pressure of the discharge is atmospheric pressure, and the suction pressure is negative. In general, in a paper mill, a multi-stage centrifugal turbine fan is used more frequently, the pressure is increased step by step, each stage is provided with a suction inlet, and each suction inlet has different vacuum degrees. If a single stage turbine fan is used, it can only operate in a single, small vacuum range.
The invention discloses a parallel centrifugal fan which is invented and created by China published patent No. CN108843603A on 2018, 11 and 20, and relates to a fan which comprises a base part and an impeller part. When the centrifugal fan operates, in the process that the motor drives the impeller of the impeller component to rotate, the impeller stirs a part of airflow in the air inlet inner cavity to flow to the inner cavity of the confluence volute, the flow of the airflow entering the inner cavity of the impeller is increased, and the large-flow airflow is decelerated and pressurized in the inner cavity of the centrifugal volute, so that the pressure of the airflow output by the centrifugal fan is improved. In the process that the airflow enters the inner cavity of the impeller from the inner cavity of the confluence volute, the impeller blades exert force on the airflow, so that the airflow flows from the impeller confluence section to the impeller centrifugal section with low energy loss. The structural characteristics of the inner cavity of the confluence volute increase the sectional area of the air flow entering the inner cavity of the impeller, shorten the axial length of the confluence section of the impeller, and enable the centrifugal fan to be compact in structure. The centrifugal fan has the advantages of unlimited axial length, large output airflow pressure and high efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a machine case to current multistage fan often packs impeller or turbine into quick-witted incasement portion, the phenomenon of stall or surge appears when the fan, and when the flow of ventilating of local vacuum component actual operation is bigger than normal, multistage turbine fan can be because associative between at different levels again, the phenomenon that the complete machine vacuum is lower than normal can appear, still can cause the sharp decline of turbine fan performance when serious, the "jam" operating mode appears, and the gear box of multistage turbine fan of installing the fan in the case outside is provided, make things convenient for the fan to overhaul when breaking down.
A gearbox for a multi-stage turbofan, comprising: box, case lid, the box include: a main gear groove, a secondary gear groove, a rotating shaft bearing groove, a main gear shaft front side mounting groove, a speed measuring tooth placing groove, a speed measuring tooth bearing bush groove and a box body sealing groove;
the main gear groove axis is arranged on the middle axial surface of the long side of the gear box;
the auxiliary gear groove is arranged on the side edge of the main gear groove, the axis of the auxiliary gear groove is parallel to the axis of the main gear groove, and the bottom of the auxiliary gear groove is provided with an oil port;
the number of the rotating shaft bearing grooves is matched with the number of the main gear grooves and the number of the auxiliary gear grooves, the rotating shaft bearing grooves arranged in front of and behind the main gear grooves are coaxial with the main gear grooves, and the rotating shaft bearing grooves arranged in front of and behind the auxiliary gear grooves are coaxial with the auxiliary gear grooves;
the mounting groove at the front side of the main gear shaft is arranged in front of the rotating shaft bearing groove at the front side of the main gear groove and is communicated with the rotating shaft bearing groove at the front side of the main gear groove;
the speed measuring tooth placement groove is arranged on the rear side of the rotating shaft bearing groove on the rear side of the main gear groove, and a speed measuring insertion hole is formed in the lower side of the speed measuring tooth placement groove;
the speed measuring tooth shaft bush groove is arranged on the box body at the rear side of the speed measuring tooth placement groove and is communicated with the speed measuring tooth placement groove;
the box body closed slot and the slave gear slot are coaxially arranged, and the box body closed slot is respectively arranged at the front side of the slave gear slot from the front side of the gear slot and at the rear side of the slave gear slot from the rear side of the gear slot and is communicated with the slave gear slot.
Preferably, the case cover comprises: the device comprises a main gear upper groove, a slave gear side box body sealing groove, a slave gear shaft bush groove, a main gear shaft front side sealing groove, a speed measuring gear bush upper groove and an observation window;
the upper groove of the main gear is matched with the position of the main gear groove and is arranged upwards from the bottom surface of the box cover;
the positions and the number of the auxiliary gear upper grooves are matched with those of the auxiliary gear grooves, and the auxiliary gear upper grooves are formed upwards from the bottom surface of the box cover;
the observation window is arranged on the box body at the top of the upper groove of the slave gear;
the slave gear shaft bush groove and the slave gear upper groove are coaxially arranged;
the auxiliary gear side box body closed groove and the auxiliary gear upper groove are coaxially arranged and are matched with the box body closed groove in size and position;
the size and the position of the front side sealing groove of the main gear shaft are matched with those of the front side mounting groove of the main gear shaft;
the upper groove of the bearing bush of the speed measuring gear is matched with the groove of the bearing bush of the speed measuring gear in size and position.
Preferably, the main gear upper groove further comprises a rotating shaft bearing installation cavity, the shaft length of the rotating shaft bearing installation cavity is greater than that of the main gear upper groove, and the diameter of the rotating shaft bearing installation cavity is matched with that of the rotating shaft bearing groove.
Preferably, the driven gear upper groove further comprises a driven bearing installation cavity, the shaft length of the driven bearing installation cavity is larger than that of the driven gear upper groove and smaller than that of the rotating shaft bearing installation cavity, and the diameter of the driven bearing installation cavity is the same as that of the rotating shaft bearing installation cavity.
Preferably, the bottom of the side surface of the box body is also provided with an oil loop port which is communicated with the oil port;
a small hole is also formed in the rotating shaft bearing groove;
a lubricating oil passage is arranged in the box body and is communicated with the small hole in the bearing groove of the rotating shaft;
the side surface of the box body is also provided with a bearing groove lubricating oil hole which is communicated with the lubricating oil passage;
preferably, the speed measuring tooth placing groove is long waist-shaped, and the angle between the middle axial plane and the middle axial plane of the box body is 30-50 degrees.
The beneficial effects of the utility model reside in that: the blower case is convenient to overhaul when the blower fails; the gearbox provides primary speed acceleration and simultaneously drives a multi-stage fan, so that the requirement on the rotating speed of power input is reduced; the gear box also provides the function that rotational speed detected, can real-time detection actual rotational speed conveniently calculate control.
Drawings
FIG. 1 is a schematic top view of a box body of the present invention;
FIG. 2 is a schematic view of the back of the case of the present invention;
FIG. 3 is a schematic side view of the case of the present invention;
FIG. 4 is a schematic view of the bottom of the cover of the utility model;
FIG. 5 is a schematic view of the back of the case cover of the present invention;
in the figure: 1. A main gear groove, 2, a slave gear groove, 3, a rotating shaft bearing groove, 4, a main gear shaft front side mounting groove, 5, a speed measurement gear placing groove, 6, a speed measurement gear shaft bush groove, 7, a box body sealing groove, 8, a main gear upper groove, 9, a slave gear upper groove, 10, a slave gear side box body sealing groove, 11, a slave gear shaft bush groove, 12, a main gear shaft front side sealing groove, 13, a speed measurement gear shaft bush upper groove, 14, an observation window, 15, a rotating shaft bearing mounting cavity, 16, a bearing mounting cavity, 17, an oil return opening, 18, a small hole, 19, a lubricating oil passage, 20, a bearing groove lubricating oil hole.
Detailed Description
The technical solution of the present invention is further specifically described below by way of specific embodiments and with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 5, the gearbox of the multistage turbofan includes: box, case lid, the box include: the device comprises a main gear groove 1, two slave gear grooves 2, six rotating shaft bearing grooves 3, a main gear shaft front side mounting groove 4, a speed measuring tooth placing groove 5, a speed measuring tooth bearing bush groove 6 and four box body sealing grooves 7;
the axis of the main gear groove 1 is arranged on the middle axial surface of the long side of the gear box;
the two slave gear grooves 2 are respectively arranged at two sides of the main gear groove 1, the axes of the two slave gear grooves are parallel to the axis of the main gear groove 1, and the bottom of the two slave gear grooves is provided with an oil port;
the six rotating shaft bearing grooves 3 are characterized in that the rotating shaft bearing grooves 3 arranged in front of and behind the main gear groove 1 are coaxial with the main gear groove 1, and the rotating shaft bearing grooves 3 arranged in front of and behind the auxiliary gear groove 2 are coaxial with the auxiliary gear groove 2;
the main gear shaft front side mounting groove 4 is arranged in front of the rotating shaft bearing groove 3 in front of the main gear groove 1 and is communicated with the rotating shaft bearing groove 3 in front of the main gear groove 1;
the speed measuring tooth placement groove 5 is arranged on the rear side of the rotating shaft bearing groove 3 on the rear side of the main gear groove 1, and a speed measuring insertion hole is formed in the lower side of the speed measuring tooth placement groove 5;
the speed measuring tooth shaft bush groove 6 is arranged on the box body at the rear side of the speed measuring tooth placement groove 5 and is communicated with the speed measuring tooth placement groove 5;
the four box body closed grooves 7 are divided into two groups, and the box body closed grooves 7 are respectively arranged on the front side of the slave gear groove 2 and on the rear side of the slave gear groove 2 and are communicated with the slave gear groove 2 on the side; in the figure 1, the box body closed grooves 7 at the upper left, the upper right and the lower left are used for mounting bearing bushes, and the lower right is used for mounting a closed plate.
The main gear groove 1, two from gear groove 2, six pivot bearing grooves 3, main gear shaft front side mounting groove 4, the tooth groove 5 of placing tests the speed, the tooth axle bush groove 6 that tests the speed, four box closed slot 7 are the arc-shaped groove that the box upper surface was seted up downwards.
The case lid include: a main gear upper groove 8, two slave gear upper grooves 9, a slave gear side box body closed groove 107, three slave gear shaft bush grooves 11, a main gear shaft front side closed groove 12, a speed measuring gear bush upper groove 1313 and two observation windows 14;
the upper groove 8 of the main gear is matched with the groove 1 of the main gear in position and is arranged upwards from the bottom surface of the box cover;
the number and the position of the auxiliary gear upper grooves 9 are matched with those of the auxiliary gear grooves 2, and the two auxiliary gear upper grooves are arranged upwards from the bottom surface of the box cover;
the observation window 14 is arranged on the box body at the top of the gear upper groove 9;
the positions of the slave gear shaft bush grooves 11 correspond to the box body closed grooves 7 at the upper left, the upper right and the lower left in the figure 1 and are used for installing bearing bushes;
the box body sealing groove 107 on the slave gear side and the box body sealing groove 9 on the slave gear side are coaxially arranged, correspond to the box body sealing groove 7 on the lower right in the figure 1, have the same size and are used for installing a circular sealing plate;
the size and the position of the main gear shaft front side sealing groove 12 are matched with those of the main gear shaft front side mounting groove 4;
the bearing bush upper groove 1313 of the speed measuring gear is matched with the bearing bush groove 6 in size and position.
The main gear upper groove 8 further comprises a rotating shaft bearing installation cavity 15, the axial length of the rotating shaft bearing installation cavity 15 is larger than that of the main gear upper groove 8, and the diameter of the rotating shaft bearing installation cavity is matched with that of the rotating shaft bearing groove 3.
The slave gear upper groove 9 also comprises a slave bearing installation cavity 16, the axial length of the slave bearing installation cavity 16 is greater than that of the slave gear upper groove 9 and less than that of the rotating shaft bearing installation cavity 15, and the diameter of the slave gear upper groove is the same as that of the rotating shaft bearing installation cavity 15.
The bottom of the side surface of the box body is also provided with an oil return port 17 which is communicated with the oil port;
a small hole 18 is also formed in the rotating shaft bearing groove 3;
a lubricating oil passage 19 is arranged in the box body and is communicated with a small hole 18 in the rotating shaft bearing groove 3;
the side surface of the box body is also provided with a bearing groove lubricating oil hole 20 which is communicated with a lubricating oil passage 19;
the speed measuring tooth placing groove 5 is long waist-shaped, and the angle between the middle axial plane and the middle axial plane of the box body is 30-50 degrees.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A gearbox for a multi-stage turbofan, comprising: box and case lid, its characterized in that, the box include: a main gear groove, a secondary gear groove, a rotating shaft bearing groove, a main gear shaft front side mounting groove, a speed measuring tooth placing groove, a speed measuring tooth bearing bush groove and a box body sealing groove;
the main gear groove axis is arranged on the middle axial surface of the long side of the gear box;
the auxiliary gear groove is arranged on the side edge of the main gear groove, the axis of the auxiliary gear groove is parallel to the axis of the main gear groove, and the bottom of the auxiliary gear groove is provided with an oil port;
the number of the rotating shaft bearing grooves is matched with the number of the main gear grooves and the number of the auxiliary gear grooves, the rotating shaft bearing grooves arranged in front of and behind the main gear grooves are coaxial with the main gear grooves, and the rotating shaft bearing grooves arranged in front of and behind the auxiliary gear grooves are coaxial with the auxiliary gear grooves;
the mounting groove at the front side of the main gear shaft is arranged in front of the rotating shaft bearing groove at the front side of the main gear groove and is communicated with the rotating shaft bearing groove at the front side of the main gear groove;
the speed measuring tooth placement groove is arranged on the rear side of the rotating shaft bearing groove on the rear side of the main gear groove, and a speed measuring insertion hole is formed in the lower side of the speed measuring tooth placement groove;
the speed measuring tooth shaft bush groove is arranged on the box body at the rear side of the speed measuring tooth placement groove and is communicated with the speed measuring tooth placement groove;
the box body closed slot and the slave gear slot are coaxially arranged, and the box body closed slot is respectively arranged at the front side of the slave gear slot from the front side of the gear slot and at the rear side of the slave gear slot from the rear side of the gear slot and is communicated with the slave gear slot.
2. The gearbox for a multistage turbofan of claim 1 wherein the case cover comprises: the device comprises a main gear upper groove, a slave gear side box body sealing groove, a slave gear shaft bush groove, a main gear shaft front side sealing groove, a speed measuring gear bush upper groove and an observation window;
the upper groove of the main gear is matched with the position of the main gear groove and is arranged upwards from the bottom surface of the box cover;
the positions and the number of the auxiliary gear upper grooves are matched with those of the auxiliary gear grooves, and the auxiliary gear upper grooves are formed upwards from the bottom surface of the box cover;
the observation window is arranged on the box body at the top of the upper groove of the slave gear;
the slave gear shaft bush groove and the slave gear upper groove are coaxially arranged;
the auxiliary gear side box body closed groove and the auxiliary gear upper groove are coaxially arranged and are matched with the box body closed groove in size and position;
the size and the position of the front side sealing groove of the main gear shaft are matched with those of the front side mounting groove of the main gear shaft;
the upper groove of the bearing bush of the speed measuring gear is matched with the groove of the bearing bush of the speed measuring gear in size and position.
3. The gearbox of multi-stage turbo fan set forth in claim 2, wherein said main gear upper groove further comprises a shaft bearing mounting cavity, said shaft bearing mounting cavity having an axial length greater than that of the main gear upper groove and a diameter matching the shaft bearing groove diameter.
4. The gearbox for a multistage turbofan of claim 3 wherein the driven gear upper slot further comprises a driven bearing mounting cavity, the driven bearing mounting cavity having an axial length greater than the driven gear upper slot axial length less than the shaft bearing mounting cavity axial length and having a diameter equal to the shaft bearing mounting cavity diameter.
5. The gearbox of a multistage turbofan according to claim 1, wherein an oil return port is further provided at a bottom of a side surface of the case body, and is communicated with the oil port;
a small hole is also formed in the rotating shaft bearing groove;
a lubricating oil passage is arranged in the box body and is communicated with the small hole in the bearing groove of the rotating shaft;
and the side surface of the box body is also provided with a bearing groove lubricating oil hole which is communicated with the lubricating oil passage.
6. The gearbox of multistage turbo fan according to claim 1, wherein said speed measuring tooth seating groove is long kidney-shaped, and the angle between the middle axial plane and the middle axial plane of the casing is 30 to 50 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020523002.XU CN212028473U (en) | 2020-04-10 | 2020-04-10 | Gear box of multistage turbine fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020523002.XU CN212028473U (en) | 2020-04-10 | 2020-04-10 | Gear box of multistage turbine fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212028473U true CN212028473U (en) | 2020-11-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020523002.XU Active CN212028473U (en) | 2020-04-10 | 2020-04-10 | Gear box of multistage turbine fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212028473U (en) |
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2020
- 2020-04-10 CN CN202020523002.XU patent/CN212028473U/en active Active
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