CN113928058B - Integrated electric drive axle and axle housing assembly - Google Patents
Integrated electric drive axle and axle housing assembly Download PDFInfo
- Publication number
- CN113928058B CN113928058B CN202111441085.3A CN202111441085A CN113928058B CN 113928058 B CN113928058 B CN 113928058B CN 202111441085 A CN202111441085 A CN 202111441085A CN 113928058 B CN113928058 B CN 113928058B
- Authority
- CN
- China
- Prior art keywords
- temperature
- value
- liquid flow
- flow rate
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
- B60B35/16—Axle housings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
- G01K13/026—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow of moving liquids
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
Abstract
The application discloses an integrated electric drive axle and axle housing assembly, comprising: wen Can obtaining end performs fusion analysis on the temperature obtained by the first temperature obtaining device at the designated position and the second temperature obtained by the second temperature obtaining device at the position of the measuring point to obtain a cladding temperature Bw and a memory temperature Nc; then, the data collection unit is utilized to obtain the appearance data of the cooling liquid, wherein the appearance data comprises the liquid flow rate and the liquid flow temperature; transmitting the appearance data, the cladding temperature Bw and the memory temperature Nc to a temperature drop analysis unit by utilizing a data collection unit, establishing a temperature drop model, obtaining a liquid flow cooling model consisting of a uniform section and a corresponding uniform rate, and determining rational liquid flow temperature; finally, transmitting the real-time coating temperature Bw to a liquid regulation analysis unit by utilizing an integrated analysis unit, wherein the liquid regulation analysis unit is used for carrying out flow rate regulation on the coating temperature Bw by combining a model library and an execution end; optimal adjustment and control of the flow rate and the temperature of the cooling liquid are realized.
Description
Technical Field
The application belongs to the field of integrated electric drive axles, and particularly relates to an integrated electric drive axle and axle housing assembly.
Background
The patent with the publication number of CN208914949U discloses an electric drive axle and a vehicle, comprising an axle housing assembly and two electric drive axle units, wherein the two electric drive axle units are arranged on two opposite sides of the axle housing assembly; the electric drive axle unit includes: a drive motor comprising a motor shaft; the half shaft is coaxially arranged with the motor shaft; and the speed reducer assembly comprises a speed reducer, the motor shaft is connected with the input end of the speed reducer, the half shaft is positioned on one side of the speed reducer, which is close to the wheel hub, one end of the half shaft is connected with the output end of the speed reducer, and the other end of the half shaft is connected with the wheel hub. The motor shaft and the half shaft are coaxially arranged, so that the driving motor and the brake are not affected mutually, and the electric drive axle is simple in structure, the ground clearance is increased, and the electric drive axle is suitable for a semitrailer.
However, for the electric drive axle of the driving electric vehicle, water cooling is generally adopted for cooling an axle housing, and an effective control mode is lacking for cooling liquid, so that the electric drive axle capable of self-driving and making different control strategies according to different conditions is provided.
Disclosure of Invention
The application aims to provide an integrated electric drive axle and axle housing assembly.
The aim of the application can be achieved by the following technical scheme:
an integrated electric drive axle comprises a shell, a motor, a water channel and a gearbox; also comprises a liquid flow regulating system for regulating the cooling liquid in the water channel, wherein the liquid flow regulating system comprises
Wen Can acquisition end, liquid level analysis unit, model library, temperature drop analysis unit, data collection unit and execution end;
wen Can obtaining end is used for carrying out fusion analysis on the temperature obtained by the first temperature obtaining device at the designated position and the second temperature obtained by the second temperature obtaining device arranged at the measuring point position to obtain a cladding temperature Bw and a memory temperature Nc; wen Can acquisition end is used for transmitting the cladding temperature Bw and the memory temperature Nc to the data collection unit;
the data collection unit is also used for obtaining the appearance data of the cooling liquid, wherein the appearance data comprises liquid flow rate and liquid flow temperature, the liquid flow rate is the flow rate of the cooling liquid in the water channel, and the liquid flow temperature is the temperature of the cooling liquid; the data collection unit is used for transmitting the appearance data, the cladding temperature Bw and the memory temperature Nc to the temperature drop analysis unit, and the temperature drop analysis unit is used for establishing a temperature drop model according to the appearance data, the cladding temperature Bw and the memory temperature Nc to obtain a liquid flow cooling model composed of an average segment and a corresponding average increasing rate, and determining rational liquid flow temperature;
the temperature drop analysis unit is used for transmitting the liquid flow temperature drop model and the rational liquid flow temperature to the model library;
the integrated analysis unit is also used for transmitting the real-time coating temperature Bw to the liquid level analysis unit, and the liquid level analysis unit is used for carrying out flow speed adjustment on the coating temperature Bw by combining a model library and an execution end.
Further, the Wen Can acquisition end comprises an integrated analysis unit and a distributed temperature measurement unit; the distributed temperature measurement unit comprises a first temperature acquisition device arranged at a designated position of the electric drive axle and a second temperature acquisition device arranged at a measuring point position of the axle housing, wherein the temperature acquisition device can be a temperature sensor, and the designated position comprises a water channel, a stator, a rotor, lubricating oil, a bearing outer ring and the like; and fusion analysis is carried out on the temperature acquired by the first temperature acquisition device at the designated position and the second temperature acquisition device arranged at the measuring point position by means of the integrated analysis unit, so as to obtain the cladding temperature Bw and the memory temperature Nc.
Further, the integrated analysis unit is configured to transmit the wrapping temperature Bw and the memory temperature Nc to the data collection unit.
Further, the fusion analysis is specifically performed in the following manner:
step one: firstly, carrying out measurement and analysis on a plurality of first temperature acquisition devices at designated positions to obtain the memory temperature, wherein the specific mode of the measurement and analysis is as follows:
the first temperature acquisition device arranged at each designated position is single, and acquires a designated temperature group Wi, i=1, & gt, n; wi refers to the temperature acquired by the first temperature acquisition device set at the corresponding i-th designated position;
the distances between all specified positions and the axle housing are obtained, and the distances are marked as housing-direction distance groups Ki, i=1, & gt, n; ki corresponds to the designated position of the temperature equipment I acquiring Wi one by one;
summing the shell direction distance groups Ki to obtain sum values, dividing each shell direction distance group Ki by the sum value, and marking the obtained value as a scattered direction ratio Bi, i=1,..n, wherein Bi and Ki are in one-to-one correspondence;
then calculating the memory temperature Nc according to a formula, wherein the specific calculation formula is as follows:
obtaining the memory temperature Nc;
step two: the two temperature acquisition devices arranged at the measuring point positions comprise a plurality of measuring point positions, and the measuring point positions are arranged in the following manner:
firstly, in a working state, arranging a plurality of temperature acquisition devices on the surface layer and the inner layer of an axle housing in a manner of being uniformly arranged on the axle housing; all the monitored temperatures are obtained, and the temperatures are sequenced according to the sequence from the big temperature value to the small temperature value;
according to the sorting, carrying out four equal parts on the temperature value according to the number of the temperature values, and marking the first sorting and the first sorting as measuring point positions; then, marking each equal-dividing node as a corresponding measuring point position;
obtaining all measuring point positions;
step three: the method comprises the steps of obtaining the measuring point temperatures Cj, j=1, and..5 of all measuring point positions, and calculating the coating temperature Bw according to the measuring point temperatures, wherein the specific calculation formula is as follows:
wherein Cz is the highest temperature value in the measuring point temperatures;
step four: the cladding temperature Bw and the memory temperature Nc are obtained.
Further, the specific mode for establishing the temperature drop model is as follows:
s1: firstly, setting the liquid flow temperature at a specified value;
s2: establishing an appearance model between the liquid flow rate and the coating temperature Bw to obtain a liquid flow slope Ki, i=1, & gt, m;
s3: let m=3 first;
s4: at this time, calculating the mean value of the Ki, marking the mean value as a slope mean value, then calculating the sum of absolute values of differences between the slope Ki of the liquid flow and the slope mean value, and marking the sum as an outlier;
s5: when the outlier is lower than X1, generating a reasonable signal, otherwise generating an uncombined signal;
s6: after adding a process to the m value when generating a reasonable signal, repeating the steps S4-S5 until generating an uncombined signal, and when generating the uncombined signal, automatically taking the m value obtained by subtracting one from the current m value to obtain Ki, i=1..m; the corresponding flow rate Yli, the section i=1.m is labeled as the all-directional section, the mean value of the corresponding Ki is labeled as the average rate of the equidirectional segment, where i=1..m;
s7: after the first isotropic segment is removed, marking the next Ki as K1, and carrying out subsequent Ki forward processing, wherein the next value of the m value in the step S6 is marked as 1 to obtain K1;
s8: and repeating the steps S3-S8 to finish the treatment of all Kis to obtain a plurality of uniform segments and corresponding uniform increment rates thereof;
s9: the uniform-direction section and the corresponding uniform increasing rate form a liquid flow cooling model;
s10: the rational fluid temperature is then determined.
Further, the method for establishing the appearance model in the step S2 is as follows:
s201: obtaining the lowest liquid flow rate, which is the lowest value preset by a manager, measuring to obtain a reduced value of the cladding temperature Bw in unit time at the moment, and marking the reduced value as a single reduced value;
s202: then increasing the liquid flow rate by a unit value, and measuring again to obtain a single reduction value of the cladding temperature Bw in unit time at the moment;
s203: repeating steps S202-S203 until the flow rate of the liquid increases to a preset liquid flow value, wherein the value is preset by a manager;
s204: the individual liquid flow rates of steps S201-S203 are labeled Yli, i=1,..m; the single drop value of the corresponding cladding temperature Bw is marked Dli, i=1,..m;
s205: then calculating the slope Ki of the liquid flow by using a formula; the specific calculation formula is as follows:
Ki＝(Dl i+1 -Dl i ) 1, where i=1,..m.
Further, the specific manner of determining the rational liquid flow temperature in step S10 is as follows:
fixing the liquid flow rate at a specified value;
setting a basic liquid flow temperature which is the highest liquid flow temperature in the prior art, and setting by means of a manager;
on the basis, temperature values of the cladding temperature Bw and the memory temperature Nc which are reduced in unit time are obtained, corresponding packet drop unit values and internal drop unit values are obtained, and a total drop value is calculated, wherein the calculation formula is as follows:
composite drop value = 0.42 x packet drop single value +0.58 x inner drop single value;
then sequentially reducing the liquid flow temperature of the unit value until the liquid flow temperature reaches a preset lower limit value, wherein the value is preset by a manager;
and calculating a total drop value every time the liquid flow temperature is reduced, and marking the liquid flow temperature corresponding to the value with the highest total drop value as the rational liquid flow temperature.
Further, the specific mode of flow rate adjustment is as follows:
SS1: the method comprises the steps of obtaining a coating temperature Bw, obtaining a standard temperature built in a liquid regulation analysis unit, wherein the standard temperature is a temperature value of an optimal working state of an axle housing;
SS2: acquiring the slowest time when the temperature of the compliance is reduced below the standard temperature, wherein the time of the compliance is preset by a manager;
SS3: then, dividing the coating temperature Bw by the standard temperature when the compliance is reduced to obtain the intention increasing rate;
SS4: matching the intention increasing rate with the average increasing rate in the liquid flow cooling model to obtain corresponding liquid flow rate, and marking the liquid flow rate as a regulating flow rate;
SS5: transmitting the regulated flow rate to an execution end, and regulating the flow speed of the cooling liquid in the water channel to a corresponding regulated flow rate value by means of the execution end;
SS6: the flow rate adjustment step is completed.
The application has the beneficial effects that:
the method comprises the steps that a temperature parameter obtaining end is used for carrying out fusion analysis on temperatures obtained by a first temperature obtaining device at a designated position and a second temperature obtaining device arranged at a measuring point position to obtain a cladding temperature Bw and a memory temperature Nc; then, the data collection unit is utilized to obtain the appearance data of the cooling liquid, wherein the appearance data comprises the liquid flow rate and the liquid flow temperature; transmitting the appearance data, the cladding temperature Bw and the memory temperature Nc to a temperature drop analysis unit by utilizing a data collection unit, establishing a temperature drop model, obtaining a liquid flow cooling model consisting of a uniform section and a corresponding uniform rate, and determining rational liquid flow temperature;
finally, transmitting the real-time coating temperature Bw to a liquid regulation analysis unit by utilizing an integrated analysis unit, wherein the liquid regulation analysis unit is used for carrying out flow rate regulation on the coating temperature Bw by combining a model library and an execution end; optimal adjustment and control of the flow rate and the temperature of the cooling liquid are realized.
Drawings
The present application is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
FIG. 1 is a schematic diagram of an electric drive axle in the prior art;
fig. 2 is a system block diagram of the present application.
Detailed Description
As shown in fig. 1, in the prior art, an electric drive axle for driving a new energy automobile, specifically, a three-in-one electric drive axle is listed. The electric drive axle comprises a shell 100, a motor, a water channel 110 and a gearbox 400, and at least comprises a first bearing 500A and a second bearing 500B; and in particular discloses that a stator of a motor is fixed on a shell 100, the tail end of a rotor of the motor is connected with the shell 100 through a first bearing 500A, the output end of the rotor of the motor is connected with a gearbox 400 and the shell 100 through a second bearing 500B, and the motor is changed
The inner cavity of the gearbox 400 accommodates lubricating oil 420, the water channel 110 is connected with the housing 100, and cooling liquid flows in the water channel 110 to take away heat of the housing 100, so that the water channel 110 is used for cooling the housing 100. Wherein, the output shaft of the motor drives the driving shaft of the new energy automobile after changing and decelerating or reversing through the gearbox 400. The gearbox 400 has a cavity in which the gear set 430 is located. Lubricating oil 420 wets gear set 430 to protect gear set 430. The output end of the rotor of the motor is connected to the gearbox 400 and the housing 100 through a second bearing 500B, whereby the second bearing 500B is located at the junction of the motor rotor and the gearbox 400, and a shaft seal 410 is also provided at the second bearing 500B for preventing the lubrication oil 420 in the gearbox 400 from entering the motor cavity. The first bearing 500A and the second bearing 500B are rolling bearings that act to fix the rotor and reduce the coefficient of friction of the load. The rolling bearing includes at least an outer race 510, an inner race 520, and balls 530.
However, due to the high degree of mechanical integration of the motor and gearbox 400 in the electric drive axle, bearings disposed at different locations are in different and complex temperature fields, and thus complex temperature boundaries near the bearings may result in increased absolute temperature of the bearings or increased temperature differentials between the inner race 520 and the outer race 510. Therefore, how to accurately monitor the temperature changes of the bearings at different positions in real time has certain difficulty;
based on the above, the application also provides an integrated electric drive axle which can actively and frontally cool the axle housing;
as shown in fig. 2, the electric drive axle further comprises a temperature parameter acquisition end, a liquid level analysis unit, a model library, a temperature drop analysis unit, a data collection unit and an execution end;
the Wen Can acquisition end comprises an integrated analysis unit and a distributed temperature measurement unit; the distributed temperature measurement unit comprises a first temperature acquisition device arranged at a designated position of the electric drive axle and a second temperature acquisition device arranged at a measuring point position of the axle housing, wherein the temperature acquisition device can be a temperature sensor, and the designated position comprises a water channel, a stator, a rotor, lubricating oil, a bearing outer ring and the like; and the fusion analysis is carried out on the temperature acquired by the first temperature acquisition device at the designated position and the second temperature acquisition device arranged at the measuring point position by means of the integrated analysis unit, wherein the specific mode of the fusion analysis is as follows:
step one: firstly, carrying out measurement and analysis on a plurality of first temperature acquisition devices at designated positions to obtain the memory temperature, wherein the specific mode of the measurement and analysis is as follows:
the first temperature acquisition device arranged at each designated position is single, and acquires a designated temperature group Wi, i=1, & gt, n; wi refers to the temperature acquired by the first temperature acquisition device set at the corresponding i-th designated position;
the distances between all specified positions and the axle housing are obtained, and the distances are marked as housing-direction distance groups Ki, i=1, & gt, n; ki corresponds to the designated position of the temperature equipment I acquiring Wi one by one;
summing the shell direction distance groups Ki to obtain sum values, dividing each shell direction distance group Ki by the sum value, and marking the obtained value as a scattered direction ratio Bi, i=1,..n, wherein Bi and Ki are in one-to-one correspondence;
then calculating the memory temperature Nc according to a formula, wherein the specific calculation formula is as follows:
obtaining the memory temperature Nc;
step two: the two temperature acquisition devices arranged at the measuring point positions comprise a plurality of measuring point positions, and the measuring point positions are arranged in the following manner:
firstly, in a working state, arranging a plurality of temperature acquisition devices on the surface layer and the inner layer of an axle housing in a manner of being uniformly arranged on the axle housing; all the monitored temperatures are obtained, and the temperatures are sequenced according to the sequence from the big temperature value to the small temperature value;
according to the sorting, carrying out four equal parts on the temperature value according to the number of the temperature values, and marking the first sorting and the first sorting as measuring point positions; then, marking each equal-dividing node as a corresponding measuring point position;
obtaining all measuring point positions;
step three: the method comprises the steps of obtaining the measuring point temperatures Cj, j=1, and..5 of all measuring point positions, and calculating the coating temperature Bw according to the measuring point temperatures, wherein the specific calculation formula is as follows:
wherein Cz is the highest temperature value in the measuring point temperatures;
step four: obtaining a cladding temperature Bw and a memory temperature Nc;
the integrated analysis unit is used for transmitting the cladding temperature Bw and the memory temperature Nc to the data collection unit;
the data collection unit is also used for obtaining the appearance data of the cooling liquid, wherein the appearance data comprises liquid flow rate and liquid flow temperature, the liquid flow rate is the flow rate of the cooling liquid in the water channel, and the liquid flow temperature is the temperature of the cooling liquid; the data collection unit is used for transmitting the appearance data, the cladding temperature Bw and the memory temperature Nc to the temperature drop analysis unit, and the temperature drop analysis unit is used for building a temperature drop model according to the appearance data, the cladding temperature Bw and the memory temperature Nc, and the temperature drop model building specific mode is as follows:
s1: firstly, setting the liquid flow temperature at a specified value;
s2: establishing a representation model between the flow rate of the liquid and the coating temperature Bw, wherein the representation model is established by the following steps:
s201: obtaining the lowest liquid flow rate, which is the lowest value preset by a manager, measuring to obtain a reduced value of the cladding temperature Bw in unit time at the moment, and marking the reduced value as a single reduced value;
s202: then increasing the liquid flow rate by a unit value, and measuring again to obtain a single reduction value of the cladding temperature Bw in unit time at the moment;
s203: repeating steps S202-S203 until the flow rate of the liquid increases to a preset liquid flow value, wherein the value is preset by a manager;
s204: the individual liquid flow rates of steps S201-S203 are labeled Yli, i=1,..m; the single drop value of the corresponding cladding temperature Bw is marked Dli, i=1,..m;
s205: then calculating the slope Ki of the liquid flow by using a formula; the specific calculation formula is as follows:
Ki＝(Dl i+1 -Dl i ) 1, where i=1,..m;
s3: let m=3 first;
s4: at this time, calculating the mean value of the Ki, marking the mean value as a slope mean value, then calculating the sum of absolute values of differences between the slope Ki of the liquid flow and the slope mean value, and marking the sum as an outlier;
s5: when the outlier is lower than X1, generating a reasonable signal, otherwise generating an uncombined signal;
s6: after adding a process to the m value when generating a reasonable signal, repeating the steps S4-S5 until generating an uncombined signal, and when generating the uncombined signal, automatically taking the m value obtained by subtracting one from the current m value to obtain Ki, i=1..m; the corresponding flow rate Yli, the section i=1.m is labeled as the all-directional section, the mean value of the corresponding Ki is labeled as the average rate of the equidirectional segment, where i=1..m;
s7: after the first isotropic segment is removed, marking the next Ki as K1, and carrying out subsequent Ki forward processing, wherein the next value of the m value in the step S6 is marked as 1 to obtain K1;
s8: and repeating the steps S3-S8 to finish the treatment of all Kis to obtain a plurality of uniform segments and corresponding uniform increment rates thereof;
s9: the uniform-direction section and the corresponding uniform increasing rate form a liquid flow cooling model;
s10: then determining the rational liquid flow temperature in the following specific determination modes:
fixing the liquid flow rate at a specified value;
setting a basic liquid flow temperature which is the highest liquid flow temperature in the prior art, and setting by means of a manager;
on the basis, temperature values of the cladding temperature Bw and the memory temperature Nc which are reduced in unit time are obtained, corresponding packet drop unit values and internal drop unit values are obtained, and a total drop value is calculated, wherein the calculation formula is as follows:
composite drop value = 0.42 x packet drop single value +0.58 x inner drop single value;
then sequentially reducing the liquid flow temperature of the unit value until the liquid flow temperature reaches a preset lower limit value, wherein the value is preset by a manager;
calculating a total drop value every time the liquid flow temperature is reduced, and marking the liquid flow temperature corresponding to the value with the highest total drop value as a rational liquid flow temperature;
the temperature drop analysis unit is used for transmitting the liquid flow temperature drop model and the rational liquid flow temperature to the model library;
the integrated analysis unit is also used for transmitting the real-time coating temperature Bw to the liquid regulation analysis unit, and the liquid regulation analysis unit is used for carrying out flow rate regulation on the coating temperature Bw by combining a model library and an execution end, and the specific mode of flow rate regulation is as follows:
SS1: the method comprises the steps of obtaining a coating temperature Bw, obtaining a standard temperature built in a liquid regulation analysis unit, wherein the standard temperature is a temperature value of an optimal working state of an axle housing;
SS2: acquiring the slowest time when the temperature of the compliance is reduced below the standard temperature, wherein the time of the compliance is preset by a manager;
SS3: then, dividing the coating temperature Bw by the standard temperature when the compliance is reduced to obtain the intention increasing rate;
SS4: matching the intention increasing rate with the average increasing rate in the liquid flow cooling model to obtain corresponding liquid flow rate, and marking the liquid flow rate as a regulating flow rate;
SS5: transmitting the regulated flow rate to an execution end, and regulating the flow speed of the cooling liquid in the water channel to a corresponding regulated flow rate value by means of the execution end;
SS6: the flow rate adjustment step is completed.
The foregoing is merely illustrative of the structures of this application and various modifications, additions and substitutions for those skilled in the art can be made to the described embodiments without departing from the scope of the application or from the scope of the application as defined in the accompanying claims.
Claims (8)
1. An integrated electric drive axle comprises a shell (100), a motor, a water channel (110) and a gearbox (400); characterized in that it further comprises a flow regulating system for regulating the cooling fluid in the water channel (110), the flow regulating system comprising:
wen Can acquisition end: the method comprises the steps of performing fusion analysis on temperatures acquired by a first temperature acquisition device at a designated position and a second temperature acquisition device arranged at a measuring point position to obtain a cladding temperature Bw and a memory temperature Nc, and transmitting the cladding temperature Bw and the memory temperature Nc to a data collection unit; the fusion analysis concretely comprises the following steps:
step one: firstly, carrying out measurement and analysis on a plurality of first temperature acquisition devices at designated positions to obtain the memory temperature, wherein the specific mode of the measurement and analysis is as follows:
the first temperature acquisition device arranged at each designated position is single, and acquires a designated temperature group Wi, i=1, & gt, n; wi refers to the temperature acquired by the first temperature acquisition device set at the corresponding i-th designated position;
the distances between all specified positions and the axle housing are obtained, and the distances are marked as housing-direction distance groups Ki, i=1, & gt, n; ki corresponds to the designated position of the temperature equipment I acquiring Wi one by one;
summing the shell direction distance groups Ki to obtain sum values, dividing each shell direction distance group Ki by the sum value, and marking the obtained value as a scattered direction ratio Bi, i=1,..n, wherein Bi and Ki are in one-to-one correspondence;
then calculating the memory temperature Nc according to a formula, wherein the specific calculation formula is as follows:
obtaining the memory temperature Nc;
step two: the two temperature acquisition devices arranged at the measuring point positions comprise a plurality of measuring point positions, and the measuring point positions are arranged in the following manner:
firstly, in a working state, arranging a plurality of temperature acquisition devices on the surface layer and the inner layer of an axle housing in a manner of being uniformly arranged on the axle housing; all the monitored temperatures are obtained, and the temperatures are sequenced according to the sequence from the big temperature value to the small temperature value;
according to the sorting, carrying out four equal parts on the temperature value according to the number of the temperature values, and marking the first sorting and the first sorting as measuring point positions; then, marking each equal-dividing node as a corresponding measuring point position;
obtaining all measuring point positions;
step three: the method comprises the steps of obtaining the measuring point temperatures Cj, j=1, and..5 of all measuring point positions, and calculating the coating temperature Bw according to the measuring point temperatures, wherein the specific calculation formula is as follows:
wherein Cz is the highest temperature value in the measuring point temperatures;
step four: obtaining a cladding temperature Bw and a memory temperature Nc;
a data collection unit: the data collection unit is also used for obtaining the appearance data of the cooling liquid, wherein the appearance data comprises liquid flow rate and liquid flow temperature;
temperature drop analysis unit: according to the received image data, coating temperature Bw and memory temperature Nc transmitted by the data collecting unit, a temperature drop model is built, a liquid flow temperature drop model formed by a uniform section and a corresponding uniform rate is obtained, and at the same time, rational liquid flow temperature is determined; the temperature drop analysis unit transmits the liquid flow temperature drop model and the rational liquid flow temperature to a model library;
integrated analysis unit: the real-time coating temperature Bw is transmitted to a liquid level analysis unit, and the liquid level analysis unit is used for carrying out flow rate adjustment on the coating temperature Bw by combining a model library and an execution end.
2. The integrated electric drive axle of claim 1 wherein the Wen Can acquisition end comprises an integrated analysis unit, a distributed temperature measurement unit; the distributed temperature measurement unit comprises a first temperature acquisition device arranged at a designated position of the electric drive axle and a second temperature acquisition device arranged at a measuring point position of the axle housing, wherein Wen Can acquisition ends perform fusion analysis on temperatures acquired by the first temperature acquisition device at the designated position and the second temperature acquisition device arranged at the measuring point position by means of the integrated analysis unit, so as to obtain cladding temperature Bw and memory temperature Nc.
3. The integrated electric drive axle of claim 2, wherein the flow rate is a flow rate of the cooling liquid in the water channel, the flow temperature is a temperature of the cooling liquid, and the integrated analysis unit is configured to transmit the coating temperature Bw and the memory temperature Nc to the data collection unit.
4. The integrated electric drive axle of claim 1, wherein the temperature drop model is built in the following specific manner:
s1: firstly, setting the liquid flow temperature at a specified value;
s2: establishing an appearance model between the liquid flow rate and the coating temperature Bw to obtain a liquid flow slope Ki, i=1, & gt, m;
s3: let m=3 first;
s4: at this time, calculating the mean value of the Ki, marking the mean value as a slope mean value, then calculating the sum of absolute values of differences between the slope Ki of the liquid flow and the slope mean value, and marking the sum as an outlier;
s5: when the outlier is lower than X1, generating a reasonable signal, otherwise generating an uncombined signal;
s6: after adding a process to the m value when generating a reasonable signal, repeating the steps S4-S5 until generating an uncombined signal, and when generating the uncombined signal, automatically taking the m value obtained by subtracting one from the current m value to obtain Ki, i=1..m; the corresponding flow rate Yli, the section i=1.m is labeled as the all-directional section, the mean value of the corresponding Ki is labeled as the average rate of the equidirectional segment, where i=1..m;
s7: after the first isotropic segment is removed, marking the next Ki as K1, and carrying out subsequent Ki forward processing, wherein the next value of the m value in the step S6 is marked as 1 to obtain K1;
s8: and repeating the steps S3-S8 to finish the treatment of all Kis to obtain a plurality of uniform segments and corresponding uniform increment rates thereof;
s9: the uniform-direction section and the corresponding uniform increasing rate form a liquid flow cooling model;
s10: the rational fluid temperature is then determined.
5. The integrated electric drive axle of claim 4 wherein the representation model in S2 is built by:
s201: obtaining the lowest liquid flow rate, which is the lowest value preset by a manager, measuring to obtain a reduced value of the cladding temperature Bw in unit time at the moment, and marking the reduced value as a single reduced value;
s202: then increasing the liquid flow rate by a unit value, and measuring again to obtain a single reduction value of the cladding temperature Bw in unit time at the moment;
s203: repeating the step S202 until the liquid flow rate is increased to a preset liquid flow value, wherein the preset liquid flow value is preset by a manager;
s204: the individual liquid flow rates of steps S201-S203 are labeled Yli, i=1,..m; the single drop value of the corresponding cladding temperature Bw is marked Dli, i=1,..m;
s205: then calculating the slope Ki of the liquid flow by using a formula; the specific calculation formula is as follows:
Ki＝(Dl i+1 -Dl i ) 1, where i=1,..m.
6. The integrated electric drive axle of claim 4 wherein the specific manner of determining rational fluid temperature in S10 is:
fixing the liquid flow rate at a specified value;
setting a basic liquid flow temperature which is the highest liquid flow temperature in the prior art, and setting by means of a manager;
on the basis, temperature values of the cladding temperature Bw and the memory temperature Nc which are reduced in unit time are obtained, corresponding packet drop unit values and internal drop unit values are obtained, and a total drop value is calculated, wherein the calculation formula is as follows:
composite drop value = 0.42 x packet drop single value +0.58 x inner drop single value;
then sequentially reducing the liquid flow temperature of the unit value until the liquid flow temperature reaches a preset lower limit value, wherein the value is preset by a manager;
and calculating a total drop value every time the liquid flow temperature is reduced, and marking the liquid flow temperature corresponding to the value with the highest total drop value as the rational liquid flow temperature.
7. An integrated electric drive axle according to claim 4, wherein the flow rate is regulated in the following specific manner:
SS1: the method comprises the steps of obtaining a coating temperature Bw, obtaining a standard temperature built in a liquid regulation analysis unit, wherein the standard temperature is a temperature value of an optimal working state of an axle housing;
SS2: acquiring the slowest time when the temperature of the compliance is reduced below the standard temperature, wherein the time of the compliance is preset by a manager;
SS3: then, dividing the coating temperature Bw by the standard temperature when the compliance is reduced to obtain the intention increasing rate;
SS4: matching the intention increasing rate with the average increasing rate in the liquid flow cooling model to obtain corresponding liquid flow rate, and marking the liquid flow rate as a regulating flow rate;
SS5: transmitting the regulated flow rate to an execution end, and regulating the flow speed of the cooling liquid in the water channel to a corresponding regulated flow rate value by means of the execution end;
SS6: the flow rate adjustment step is completed.
8. An axle housing assembly for an integrated electric drive axle comprising an electric drive axle as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111441085.3A CN113928058B (en) | 2021-11-30 | 2021-11-30 | Integrated electric drive axle and axle housing assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111441085.3A CN113928058B (en) | 2021-11-30 | 2021-11-30 | Integrated electric drive axle and axle housing assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113928058A CN113928058A (en) | 2022-01-14 |
| CN113928058B true CN113928058B (en) | 2023-09-12 |
Family
ID=79288697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111441085.3A Active CN113928058B (en) | 2021-11-30 | 2021-11-30 | Integrated electric drive axle and axle housing assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113928058B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4011022A1 (en) * | 1989-04-08 | 1990-10-11 | Zahnradfabrik Friedrichshafen | Drive axle joining transmission and wheel hub - uses circulating fluid to cool multi-plate brakes |
| DE10249041A1 (en) * | 2002-10-22 | 2004-05-06 | Dr. Johannes Heidenhain Gmbh | Arrangement for temperature monitoring |
| CN105644268A (en) * | 2016-01-07 | 2016-06-08 | 东风商用车有限公司 | Driving axle shell |
| JP2017053758A (en) * | 2015-09-10 | 2017-03-16 | 東京電力ホールディングス株式会社 | Relevant information setting method, flow velocity measurement method, relevant information setting system and flow velocity measurement system |
| CN112861254A (en) * | 2020-12-31 | 2021-05-28 | 联合汽车电子有限公司 | Method for detecting oil temperature of electric drive axle gearbox, and method and system for controlling motor |
| CN113190991A (en) * | 2021-04-26 | 2021-07-30 | 联合汽车电子有限公司 | Bearing temperature detection method and system of electric drive axle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100567887B1 (en) * | 2003-12-04 | 2006-04-04 | 엘에스전선 주식회사 | Apparatus and Method for Analysis of Electric Power Transmission Link Status Having Function of Real-Time Evaluating Thermal Parameters Outside the Link |
-
2021
- 2021-11-30 CN CN202111441085.3A patent/CN113928058B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4011022A1 (en) * | 1989-04-08 | 1990-10-11 | Zahnradfabrik Friedrichshafen | Drive axle joining transmission and wheel hub - uses circulating fluid to cool multi-plate brakes |
| DE10249041A1 (en) * | 2002-10-22 | 2004-05-06 | Dr. Johannes Heidenhain Gmbh | Arrangement for temperature monitoring |
| JP2017053758A (en) * | 2015-09-10 | 2017-03-16 | 東京電力ホールディングス株式会社 | Relevant information setting method, flow velocity measurement method, relevant information setting system and flow velocity measurement system |
| CN105644268A (en) * | 2016-01-07 | 2016-06-08 | 东风商用车有限公司 | Driving axle shell |
| CN112861254A (en) * | 2020-12-31 | 2021-05-28 | 联合汽车电子有限公司 | Method for detecting oil temperature of electric drive axle gearbox, and method and system for controlling motor |
| CN113190991A (en) * | 2021-04-26 | 2021-07-30 | 联合汽车电子有限公司 | Bearing temperature detection method and system of electric drive axle |
Non-Patent Citations (1)
| Title |
|---|
| 基于多目标优化的某驱动桥壳轻量化设计;俞云云;崔世海;许文超;;武汉科技大学学报(04);第69-73页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113928058A (en) | 2022-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7431567B1 (en) | Wind turbine having a direct-drive drivetrain | |
| CN106870099B (en) | A kind of control method of the hybrid vehicle heat management system based on fixed road spectrum | |
| CN113928058B (en) | Integrated electric drive axle and axle housing assembly | |
| CN101949365B (en) | Kite generator set | |
| CN105484949B (en) | Bearing protection method and device of wind driven generator | |
| CN108452895B (en) | Energy-saving control method for ball mill | |
| CN110006651A (en) | A kind of determining bearing life method and apparatus | |
| CN116662897B (en) | Vehicle load prediction method based on hub data | |
| CN212363649U (en) | System for realizing fault diagnosis method of gearbox | |
| CN113656911A (en) | High-speed bearing lubrication temperature rise state analysis method | |
| CN116360491A (en) | Multi-rotor unmanned aerial vehicle power transmission and optical cable fusion inspection system and method | |
| CN113190991B (en) | Bearing temperature detection method and system for electric drive axle | |
| CN108482185A (en) | A kind of electric automobile energy management and running method based on dynamic programming algorithm | |
| CN215987023U (en) | Disinfection robot control device based on laser SLAM | |
| Lu et al. | Parameter design method for the heat transfer performance of a fan-driven gearbox under planetary gear opening and oil-return conditions | |
| CN113232664B (en) | Method and system for measuring real-time gradient of road condition of electric vehicle | |
| CN113704981A (en) | Method for analyzing time-varying dynamic behavior of high-speed bearing in temperature rise process | |
| CN115127835B (en) | Power assembly rack simulation device and method for simulating resistance and inertia force | |
| Mathur et al. | System and Component level Design Procedure for High Reduction Ratio Pericyclic Drive | |
| CN117614334B (en) | Servo motor rotational inertia control system and method based on intelligent model | |
| Zhang et al. | Research and Simulation Analysis on Dynamic Matching Characteristics of Electric Vehicle Transmission System | |
| CN112733279B (en) | Wind turbine generator system variable pitch system fault early warning identification method based on fuzzy partition | |
| DE19542507A1 (en) | Determining efficiency of heat insulated axle joint in motor vehicle | |
| Pathak et al. | An expert system for the design and selection of ball bearing parameters | |
| Polák | Theoretical Investigation of the Effect of Changes in Some Geometrical Parameters from the Point of View of the Energetic Behavior of the Roller Gearing Gearbox |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |