CN116526768A - A liquid nitrogen rapid cooling rotor platform - Google Patents

Abstract

The present invention proposes a liquid nitrogen rapid cooling rotor platform, including: heat preservation tank body, heat preservation tank cover, equipment base, power support, servo motor, reducer and electric control cabinet; liquid nitrogen vaporization pipe and transmission shaft are arranged in the heat preservation tank body , the lower end of the transmission shaft protrudes from the bottom surface of the heat preservation tank, and the upper end of the transmission shaft is distributed with a turntable, and a plurality of rotor positioning seats are evenly distributed on the turntable; a low-temperature electromagnetic valve is arranged outside the heat preservation tank; The discharge port, the corner cylinder and the temperature sensor, the corner cylinder is provided with a material reclaiming sealing door; the equipment base is provided with multiple tank pillars, and the multiple tank pillars are supported on the lower end edge of the thermal insulation tank; the top of the power support is provided with The bearing seat, the lower end of the transmission shaft passes through the bearing seat; the servo motor and the reducer are fixed in the power bracket, and an Oldham coupling is connected between the output shaft of the reducer and the lower end of the drive shaft.

Description

A liquid nitrogen rapid cooling rotor platform

technical field

The invention belongs to the field of new energy automobile motor rotor assembly, and mainly relates to a liquid nitrogen rapid cooling rotor platform.

Background technique

With the gradual phase-out of fuel vehicles, the new energy vehicle market is rapidly developing, accompanied by a huge problem of capacity expansion. The motor of new energy vehicles is an important part of new energy vehicles, and the assembly of the motor has also become a key part of ensuring mass production. At present, the technical difficulties mainly focus on: 1. The production cycle is high, and the rotor cooling and cold assembly link is also very important , in order to meet the modern assembly cycle, it is necessary to meet the 120s production cycle of the rotor. It is difficult to achieve rapid cooling of the rotor in the conventional freezer refrigeration method; 2. When the ultra-low temperature cooling method is used, the bottom seal of the heat preservation tank is very difficult to handle, and it is prone to leakage at the bottom of the motor. Third, in order to meet the production cycle, the feeding and feeding are all realized by mechanical automation. The positioning accuracy of the mechanical action at ultra-low temperature is affected by the ultra-low temperature environment and the operating conditions of the components, so it is very difficult to achieve accurate positioning.

Contents of the invention

In view of this, the object of the present invention is to provide a liquid nitrogen rapid cooling rotor platform for overcoming the above problems or at least partially solving or alleviating the above problems.

The present invention proposes a liquid nitrogen rapid cooling rotor platform, including:

An insulated tank body, the upper end of the insulated tank body is open, a liquid nitrogen vaporization tube and a transmission shaft are arranged in the insulated tank body, the lower end of the transmission shaft protrudes from the bottom surface of the insulated tank body, and the circumference of the upper end of the transmission shaft A turntable is distributed, and a plurality of rotor positioning seats are evenly distributed on the turntable, and a low-temperature electromagnetic valve is arranged outside the heat preservation tank, and the low-temperature electromagnetic valve is connected with the liquid nitrogen vaporization pipe;

Heat preservation tank cover, the heat preservation tank cover is arranged on the upper port of the heat preservation tank body, and the heat preservation tank cover is provided with a pick-up and discharge opening, a corner cylinder and a temperature sensor, and the corner cylinder is provided with a material retrieving sealing door , the detection end of the temperature sensor passes downward through the cover of the heat preservation tank;

An equipment base, on which a plurality of tank pillars are arranged, and the plurality of tank pillars are supported on the lower end edge of the heat preservation tank;

A power support, the power support is arranged directly below the heat preservation tank, the top of the power support is provided with a bearing seat, and the lower end of the transmission shaft passes through the bearing seat;

A servo motor and a reducer, the servo motor and the reducer are fixed in the power bracket, and an Oldham coupling is connected between the output shaft of the reducer and the lower end of the transmission shaft;

An electric control cabinet, the electric control cabinet is provided with an operation panel, the signal input end of the electric control cabinet receives the detection signal of the temperature sensor, and the multiple signal output ends of the electric control cabinet respectively control the low temperature electromagnetic valve , the servo motor and the angle cylinder.

The present invention also has the following optional features.

Optionally, a water receiving pan is arranged on the transmission shaft between the bearing seat and the heat preservation tank body.

Optionally, a turntable support is provided at the lower part of the turntable, and the turntable support is made of ultra-low temperature quartz material.

Optionally, a heating belt is also provided on the upper part of the heat preservation tank cover.

Optionally, the power bracket includes:

A load-bearing plate, a plurality of adjustable shims are arranged between the load-bearing plate and the equipment base, a plurality of columns are arranged on the load-bearing plate, and ring-shaped fixing plates are arranged on the upper ends of the plurality of columns, and the deceleration The upper end of the machine is connected with the annular fixed plate;

An annular top plate, a plurality of short posts are arranged between the annular top plate and the annular fixing plate, and the annular top plate is fixedly connected with the bearing seat.

Optionally, a pressure relief valve is also provided on the side wall of the thermal insulation tank.

Optionally, the liquid nitrogen vaporization tubes are horizontally distributed above each rotor positioning seat in an arc shape.

Optionally, a protective cover is provided in the middle of the turntable, and the detection end of the temperature sensor protrudes into the protective cover.

The liquid nitrogen rapid cooling rotor platform of the present invention is provided with a thermal insulation tank body, and the rotor workpiece is rapidly cooled by passing liquid nitrogen into the thermal insulation tank body to meet the modern assembly rhythm. The transmission shaft turntable is vertically arranged in the thermal insulation tank body, and The servo motor and reducer installed vertically under the insulation tank directly drive the transmission shaft and the turntable to rotate, so as to ensure the positioning accuracy of the mechanical action at ultra-low temperature, so that the rotor station is facing the sealed door of the storage material, which is convenient for the external manipulator to deposit or store the material accurately. Take out the rotor workpiece placed on the rotor station.

Description of drawings

Fig. 1 is the schematic diagram of the external structure of liquid nitrogen fast cooling rotor platform of the present invention;

Fig. 2 is the top structural schematic diagram of liquid nitrogen quick cooling rotor platform of the present invention;

3 is a schematic diagram of the internal structure of the liquid nitrogen rapid cooling rotor platform of the present invention;

Fig. 4 is the right view sectional structure schematic diagram of liquid nitrogen fast cooling rotor platform of the present invention;

Fig. 5 is a schematic cross-sectional structural view of the power support of the liquid nitrogen rapid cooling rotor platform of the present invention.

In the above figure: 1 electric control cabinet; 2 operation panel; 3 insulation tank cover; 4 inspection port; 5 corner cylinder; ;11 pressure reducing valve; 12 sewage valve; 13 equipment base; 14 bearing plate; 15 column; 16 reducer; 17 servo motor; ; 21 insulation tank body; 22 liquid nitrogen vaporization pipe; 23 rotor workpiece; 24 rotor positioning seat; 25 turntable; 26 water tray; 27 cross slider coupling; 31 Thrust ball bearing; 32 Inner fixed sleeve; 33 Outer fixed sleeve; 34 Outer load-bearing fixed plate; 35 Lock nut; 36 Hall sensor; 37 Short column; 41 liquid nitrogen pressure reducing valve bracket; 42 temperature sensor; 43 intake and discharge port; 44 tank body pillar; 45 protective cover; 46 turntable support.

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

Detailed ways

Example 1

Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, an embodiment of the present invention proposes a liquid nitrogen rapid cooling rotor platform, including: an insulated tank body 21, an insulated tank cover 3, an equipment base 13, a power bracket, and a servo motor 17 , speed reducer 16 and electric control cabinet 1; Insulation tank body 21 upper end opening, is provided with liquid nitrogen vaporization pipe 22 and transmission shaft 30 in the insulation tank body 21, the bottom surface of transmission shaft 30 stretches out insulation tank body 21, transmission shaft 30 is provided with a turntable 25 on the circumference of the upper end, and a plurality of rotor positioning seats 24 are evenly distributed on the turntable 25, and each rotor positioning seat 24 can place a rotor workpiece 23; The valve 10 is connected with the liquid nitrogen vaporization pipe 22; the heat preservation tank cover 3 is arranged on the upper port of the heat preservation tank body 21, and the heat preservation tank cover 3 is provided with a pick-up and discharge port 43, a corner cylinder 5 and a temperature sensor 42, and the corner cylinder 5 A reclaiming airtight door 6 is provided, and the detection end of the temperature sensor 42 passes through the insulation tank cover 3 downwards; multiple tank body pillars 44 are arranged on the equipment base 13, and the plurality of tank body pillars 44 are supported on the lower end edge of the heat preservation tank body 21 The power bracket is arranged directly below the heat preservation tank body 21, the top of the power bracket is provided with a bearing seat 29, and the lower end of the transmission shaft 30 passes through the bearing seat 29; the servo motor 17 and the speed reducer 16 are fixed in the power bracket, and the speed reducer 16 An Oldham coupling 27 is connected between the output shaft of the drive shaft and the lower end of the drive shaft 30; the electric control cabinet 1 is provided with an operation panel 2, and the signal input terminal of the electric control cabinet 1 receives the detection signal of the temperature sensor 3, and the electric control cabinet 1 Multiple signal output ends of the cabinet 1 control the low-temperature solenoid valve 10 , the servo motor 17 and the angle cylinder 5 respectively.

The thermal insulation tank cover 3 is fixed on the port of the thermal insulation tank body 21 through the top cover buckle 9. The edge of the thermal insulation tank cover 3 is provided with a plurality of suspension rings 8, which can be lifted when the cover is opened. The thermal insulation tank cover 3 is also provided with maintenance Port 4 is used for temporary maintenance. The cryogenic solenoid valve 10 is connected to the pressure reducing valve 11 and the liquid nitrogen inlet 40 through a pipeline. A liquid nitrogen pressure reducing valve bracket 41 is connected under the pipeline to support the weight of the pressure reducing valve 11. The liquid nitrogen inlet 40 is used for flushing For liquid nitrogen, the pressure reducing valve 11 can reduce the pressure of the liquid nitrogen inlet 40 , and the heat preservation tank 21 is also provided with a blowdown valve 12 , which can empty the liquid accumulation inside the heat preservation tank 21 . The inner bottom of the thermal insulation tank 21 is provided with an annular boss around the transmission shaft 30 to prevent the liquid at the bottom of the thermal insulation tank 21 from flowing to the opening where the transmission shaft 30 is located. A cross slider is used between the reducer 16 and the transmission shaft 30 The thermal bridge is cut off by coupling 27, which can prevent the low temperature in the heat preservation tank body 21 from extending to the transmission shaft 30 and affect its use; the ultra-low temperature mechanical seal is used between the heat preservation tank body 21 and the transmission shaft 30 for sealing treatment, further Prevent liquid leakage; the corner cylinder 5 is connected with the high-pressure air source through the pressure gas pipeline to provide power for the corner cylinder 5, and the pressure gas pipeline is connected with a switch door two-position five-way solenoid valve 18 and an air source pressure regulating valve 19 for control The movement of corner cylinder 5.

When in use, the low-temperature solenoid valve 10 is opened, and liquid nitrogen is poured into the heat preservation tank 21 through the liquid nitrogen inlet 40 and the pressure reducing valve 11. After the liquid nitrogen enters the liquid nitrogen vaporization pipe 22, it is sprayed onto each rotor in the heat preservation tank 21 for positioning. The rotor workpiece 23 on the seat 24 is rapidly cooled and cooled for the rotor workpiece 23. The temperature sensor 42 detects the temperature inside the heat preservation tank 21, and feeds back the detection result to the electric control cabinet 1, so that the low-temperature solenoid valve 10 can adjust the liquid nitrogen input in real time. Use this to adjust the temperature.

When storing the rotor workpiece 23, the angle cylinder 5 is controlled by the switch door two-position five-way solenoid valve 18 to open the material sealing door 6. At this time, the external manipulator puts the rotor workpiece 23 into the rotor positioning seat 24 or takes it out from the rotor positioning seat 24. , and then the corner cylinder 5 closes the reclaiming sealing door 6, and each time the rotor workpiece 23 is stored, the servo motor 17 drives the transmission shaft 30 and the turntable 25 to rotate an angle through the reducer 16, so that the next rotor positioning seat 24 is facing the reclaiming seal The door 6 is convenient for the external manipulator to store or grab the rotor workpiece 25 accurately.

Example 2

Referring to FIG. 4 and FIG. 5 , on the basis of Embodiment 1, a water receiving tray 26 is provided on the transmission shaft 30 between the bearing seat 29 and the heat preservation tank body 21 .

The low temperature in the insulated tank 21 can be transmitted to the outside through the transmission shaft 30, so that condensed water can be condensed on the transmission shaft 30 outside the insulated tank 21. In order to prevent the condensed water from flowing into the bearing housing 29 along the transmission shaft, the Water receiving tray 26 is set on 30 and can block condensed water.

Example 3

Referring to FIG. 4 , on the basis of Embodiment 1, the lower part of the turntable 25 is provided with a turntable support 46 , and the turntable support 46 is made of ultra-low temperature quartz material.

Because the turntable 25 needs to cooperate with the mechanical arm to take and discharge materials, the moving parts must meet the high-precision requirements. However, the moving parts are located in an ultra-low temperature environment, with huge deformation and common materials cannot work in an ultra-low temperature environment. Therefore, it is necessary to focus on solving the ultra-low temperature environment. The rotor positioning problem; the turntable support 46 is made of ultra-low temperature quartz material, which can reduce the accuracy error caused by the ultra-low temperature metal deformation.

Example 4

Referring to FIG. 1 , on the basis of Embodiment 1, a heating belt 7 is also provided on the top of the heat insulation tank cover 3 .

The heating band 7 is arranged on the top of the insulation tank cover 3, and is close to the pick-up and discharge opening 43. The heating belt 7 is energized and heated, which can avoid the condensation of condensed water on the outer surface of the insulation tank cover 3.

Example 5

With reference to Fig. 5, on the basis of Embodiment 1, the power support includes: a load bearing plate 14 and an annular top plate 39; a plurality of adjustable pad irons 38 are arranged between the load bearing plate 14 and the equipment base 13; A column 15, the upper end of a plurality of columns 15 is provided with an annular fixed plate 28, and the upper end of the reducer 16 is connected with the annular fixed plate 28; between the annular top plate 39 and the annular fixed plate 28, a plurality of short columns 37 are arranged, and the annular top plate 39 are fixedly connected with bearing seat 29.

The ring-shaped top plate 39 and the ring-shaped fixed plate 28 are both inner circle and outer square structures, and four short columns 37 are arranged at the four corners of the annular top plate 39 and the annular fixed plate 28; Four adjustable pad irons 38 can adjust the verticality between the whole power bracket and the horizontal plane; the bearing seat 29 is in a cylindrical structure, and an annular disk is arranged on the outside of the lower end of the bearing seat 29, and the annular disk rides on the annular top plate 39, and the annular top plate 39 bears the weight borne by the entire bearing seat 29 and the transmission shaft 30 through the annular disk; two thrust ball bearings 31 are arranged in the bearing seat 29, and an inner fixed sleeve 32 is arranged between the inner rings of the two thrust ball bearings 31, The inner rings of the two thrust ball bearings 31 and the inner fixed sleeves 32 are both set on the transmission shaft 30, and the outer rings of the two thrust ball bearings 31 are provided with an outer fixed sleeve 33, and the outer fixed sleeves 33 are set on the inner side of the bearing housing 29 The lower end of the bearing seat 29 is connected with an annular outer load-bearing fixed plate 34, the outer load-bearing fixed plate 34 is in contact with the outer ring of the thrust ball bearing 31, and the thrust ball bearing 31 bears the weight borne on the entire transmission shaft 30, and the turntable 25 The concentricity is realized by two pairs of thrust ball bearings 31, which ensures that the rotor workpiece 23 can stay at the designated position every time under ultra-low temperature. The lower end of the transmission shaft 30 is also connected with a lock nut 35, the lock nut 35 abuts on the lower end of the inner ring of the thrust ball bearing 31, and the ring-shaped top plate 39 is also provided with a Hall sensor 36, and the end of the Hall sensor 36 faces the heat preservation tank The bottom of the body 21 can detect the distance between the annular top plate 39 and the insulation tank body 21.

Example 6

Referring to Figure 1 and Figure 2, on the basis of Embodiment 1, a pressure relief valve 20 is also provided on the side wall of the heat preservation tank 21.

After the liquid nitrogen evaporates, the internal air pressure of the thermal insulation tank 21 will increase. When the air pressure increases to a preset value, the pressure relief valve 20 will release the pressure of the thermal insulation tank 21 .

Example 7

Referring to FIG. 3 and FIG. 4 , on the basis of Embodiment 1, the liquid nitrogen vaporization tubes 22 are horizontally distributed above each rotor positioning seat 24 in an arc shape.

Since the ten rotor positioning seats 24 are distributed symmetrically on the turntable 25 in a circumferential manner, the liquid nitrogen vaporization tubes 22 are also distributed horizontally above each rotor positioning seat 24 in a circular arc shape, so that the liquid nitrogen on the liquid nitrogen vaporization tubes 22 The spray head directly sprays liquid nitrogen on the rotor workpiece 23 placed on the rotor positioning seat 24 to cool down.

Example 8

3 and 4 , on the basis of Embodiment 7, a protective cover 45 is provided in the middle of the turntable 25 , and the detection end of the temperature sensor 42 extends into the protective cover 45 .

Small holes are uniformly arranged on the side wall of the protective cover 45 , which will not hinder the air circulation, and can block liquid nitrogen from being directly sprayed on the temperature sensor 42 to affect the accuracy of the temperature sensor 42 .

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims. The components and structures not described in detail in this embodiment are known components and common structures or common means in this industry, and are not described here one by one.

Claims (8)

1. A liquid nitrogen rapid cooling rotor platform, characterized in that, comprising: An insulated tank (21), the upper end of the insulated tank (21) is open, a liquid nitrogen vaporization tube (22) and a transmission shaft (30) are arranged inside the insulated tank (21), and the transmission shaft (30) The lower end of the lower end protrudes from the bottom surface of the heat preservation tank body (21), and the upper end of the transmission shaft (30) is distributed with a turntable (25), and a plurality of rotor positioning seats (24) are evenly distributed on the turntable (25). ), the outside of the insulated tank (21) is provided with a low-temperature electromagnetic valve (10), and the low-temperature electromagnetic valve (10) communicates with the liquid nitrogen vaporization pipe (22); Insulation tank lid (3), described insulation tank lid (3) is arranged on the upper port of described insulation tank body (21), and described insulation tank lid (3) is provided with pick-up and discharge port (43), corner cylinder (5) and temperature sensor (42), described corner cylinder (5) is provided with material reclaiming airtight door (6), and the detection end of described temperature sensor (42) passes through described insulation tank lid (3) downwards ; The equipment base (13), the equipment base (13) is provided with a plurality of tank body pillars (44), and the plurality of tank body pillars (44) are supported on the lower end edge of the heat preservation tank body (21); Power bracket, the power bracket is arranged directly below the heat preservation tank (21), the top of the power bracket is provided with a bearing seat (29), and the lower end of the transmission shaft (30) passes through the bearing seat (29); Servomotor (17) and speed reducer (16), described servomotor (17) and described speed reducer (16) are fixed in described power support, the output shaft of described speed reducer (16) and described transmission shaft An Oldham coupling (27) is connected between the lower ends of (30); An electric control cabinet (1), the electric control cabinet (1) is provided with an operation panel (2), the signal input end of the electric control cabinet (1) receives the detection signal of the temperature sensor (3), the Multiple signal output ends of the electric control cabinet (1) respectively control the low-temperature electromagnetic valve (10), the servo motor (17) and the corner cylinder (5). 2. The liquid nitrogen rapid cooling rotor platform according to claim 1, characterized in that a water receiving tray is arranged on the drive shaft (30) between the bearing seat (29) and the heat preservation tank (21) (26). 3. The liquid nitrogen rapid cooling rotor platform according to claim 1, characterized in that, the lower part of the turntable (25) is provided with a turntable support (46), and the turntable support (46) is made of ultra-low temperature quartz material become. 4. The liquid nitrogen rapid cooling rotor platform according to claim 1, characterized in that a heating belt (7) is also provided on the upper part of the heat preservation tank cover (3). 5. The liquid nitrogen rapid cooling rotor platform according to claim 1, wherein the power bracket comprises: A load-bearing plate (14), a plurality of adjustable pad irons (38) are arranged between the load-bearing plate (14) and the equipment base (13), and a plurality of columns (15) are arranged on the load-bearing plate (14) ), the upper ends of a plurality of the columns (15) are provided with an annular fixed plate (28), and the upper end of the reducer (16) is connected with the annular fixed plate (28); An annular top plate (39), a plurality of stubs (37) are arranged between the annular top plate (39) and the annular fixing plate (28), and the annular top plate (39) is fixed to the bearing seat (29) connect. 6. The liquid nitrogen rapid cooling rotor platform according to claim 1, characterized in that a pressure relief valve (20) is also provided on the side wall of the heat preservation tank (21). 7. The liquid nitrogen rapid cooling rotor platform according to claim 1, characterized in that, the liquid nitrogen vaporization pipes (22) are horizontally distributed above each rotor positioning seat (24) in a circular arc shape. 8. The liquid nitrogen rapid cooling rotor platform according to claim 7, characterized in that a protective cover (45) is provided in the middle of the turntable (25), and the detection end of the temperature sensor (42) extends into the Inside the protective cover (45).