A commutation and boosting structure for internal coolant in an electric motor and the motor itself.

Abstract

This invention provides a reversing and pressurizing structure for the internal coolant of an electric motor and an electric motor, comprising: an internal pipeline connecting region I and region II, used to guide coolant from region I to region II or from region II to region I; a pressurizing device connected to the internal pipeline for pressurizing the coolant inside the internal pipeline; and a pressure differential reversing mechanism for switching the pressurizing direction of the coolant in the internal pipeline to forward or reverse according to the pressure difference between region II and region III; when the coolant pressure in region II is greater than that in region III, the pressurizing direction of the internal pipeline is switched to forward, pressurizing the coolant in region I to region II; when the coolant pressure in region II is less than that in region III, the pressurizing direction of the internal pipeline is switched to reverse, pressurizing the coolant in region II to region I. This application can pressurize the internal coolant in the above-mentioned motor when the internal cooling circulation loop is reversed.

Description

Technical Field

[0001] This invention belongs to the field of power engineering and engineering thermophysics, and specifically relates to a commutation and pressurization structure for the internal coolant of an electric motor and the motor itself. Background Technology

[0002] Variable frequency wet motors often use an independent internal cooling circulation loop to cool the motor. According to the change of motor speed, the cooling circulation loop can automatically switch and select between forward and reverse circulation loops.

[0003] However, considering the need for lightweight and miniaturized overall motor structure, the unit uses a thrust disc with openings as an auxiliary impeller to provide internal head for the coolant in the motor cavity. The internal friction and local losses within the motor cavity are significant. In particular, switching the direction of the cooling circulation loop can lead to insufficient power for the circulating coolant, preventing it from completing internal circulation and thus affecting motor heat dissipation and the normal operation of the unit.

[0004] However, if pressurization devices are set up separately for the forward and reverse circulation loops, it will lead to a complex structure and increased cost. In addition, the additional pressurization devices need to be operated separately, which will complicate the operation process and increase the difficulty of operation. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a commutation and pressurization structure for the internal coolant of an electric motor and an electric motor, which can pressurize the internal coolant when the internal cooling circulation loop of the aforementioned electric motor is commutated.

[0006] To achieve the above objectives, the present invention is implemented using the following technical solution:

[0007] In a first aspect, the present invention provides a reversing and pressurizing structure for the internal coolant of an electric motor, which is disposed in the inner cavity of the motor. The inner cavity of the motor is provided with region I, region II and region III arranged in the forward circulation sequence of the coolant. Region III is separated from region II by a motor cover. Region I and region II are separated by the reversing and pressurizing structure.

[0008] The commutation booster structure includes:

[0009] Internal piping, which connects region I and region II, is used to direct coolant from region I to region II or from region II to region I;

[0010] A pressurizing device, connected to the internal piping, is used to pressurize the coolant inside the internal piping;

[0011] The differential pressure reversing mechanism is used to switch the coolant pressurization direction of the internal pipeline to either forward or reverse based on the pressure difference between Zone II and Zone III. When the coolant pressure in Zone II is greater than that in Zone III, the internal pipeline coolant pressurization direction is switched to forward, causing Zone I to pressurize the coolant in Zone II. When the coolant pressure in Zone II is less than that in Zone III, the internal pipeline coolant pressurization direction is switched to reverse, causing Zone II to pressurize the coolant in Zone I.

[0012] The above settings achieve the following effect: During forward circulation, the flow path is: circulating power source (thrust disc), motor air gap, zone I, zone II, zone III, cooling water pipe, circulating power source (thrust disc).

[0013] In reverse circulation, the flow path is: circulating power source (thrust disc), cooling water pipe, zone III, zone II, zone I, motor air gap, circulating power source (thrust disc).

[0014] By detecting the pressure difference between zone II and zone III, the direction of circulation is determined to confirm whether the circulation is forward or reverse. This application can increase the pressure of the coolant in the motor cavity according to the change in the direction of circulation within the motor, thereby overcoming the internal resistance of the motor cavity and ensuring smooth circulation. At the same time, it is simple to operate and reduces costs while increasing efficiency.

[0015] Further settings:

[0016] The pressurizing device includes an impeller A connected to the motor main shaft via a bushing A;

[0017] The commutation and boosting structure also includes an impeller A front end cover and an impeller A rear end cover disposed inside the motor;

[0018] The internal piping includes impeller A rear end cover through hole A, impeller A rear end cover through hole B, impeller A rear end cover through hole C, impeller A rear end cover through hole D, impeller A rear end cover through hole E, impeller A rear end cover through hole F and impeller A rear end cover through hole G, as well as impeller A front end cover through hole A and impeller A front end cover through hole B, which are provided in the impeller A front end cover.

[0019] One end of the through hole A of the rear end cover of impeller A is connected to region I, and the other end is connected to the outlet region of impeller A;

[0020] One end of the through hole B of the rear end cover of impeller A is connected to region I, and the other end is connected to one end of the through hole A of the front end cover of impeller A. The through hole B of the rear end cover of impeller A is not connected to the outlet part of impeller A.

[0021] One end of the through hole C of the rear end cover of impeller A is connected to region II, and the other end is connected to the outlet region of impeller A;

[0022] One end of the through hole D of the rear end cover of impeller A is connected to region II, and the other end is connected to one end of the through hole B of the front end cover of impeller A;

[0023] One end of the through hole A of the front cover of impeller A is connected to one end of the through hole B of the rear cover of impeller A, and the other end is connected to the inlet of impeller A;

[0024] One end of the through hole B at the front end of impeller A is connected to one end of the through hole D at the rear end of impeller A, and the other end is connected to the inlet of impeller A.

[0025] Further configuration: The differential pressure reversing mechanism includes:

[0026] Impeller B is fixedly installed on the connecting pipe between Zone III and Zone II, and can rotate in the forward or reverse direction with the flow of coolant in the connecting pipe between Zone III and Zone II.

[0027] The worm gear is connected to the bottom of the impeller and rotates with the impeller.

[0028] The worm gear is fastened to piston A at its left end and to piston B at its right end; the worm gear and worm wheel perform worm gear transmission.

[0029] Piston A is used to block the through hole A of the rear end cover of impeller A while opening the through hole B of the rear end cover of impeller A as the worm moves; or to block the through hole B of the rear end cover of impeller A while opening the through hole A of the rear end cover of impeller A.

[0030] Piston B is used to block the through hole C of the rear end cover of impeller A while opening the through hole D of the rear end cover of impeller A, or to block the through hole D of the rear end cover of impeller A while opening the through hole C of the rear end cover of impeller A.

[0031] Furthermore, the differential pressure reversing mechanism also includes:

[0032] The through hole E of the rear end cover of impeller A is located in the rear end cover of impeller A. The right section of the through hole E of the rear end cover of impeller A is closed by the rear end cover of impeller A itself, and spring B, piston B, worm gear, piston A, spring A, and pressure plate are installed in sequence inside it; the left end is closed by the pressure plate.

[0033] One end of spring B is connected to the right section of piston B, and the other end is connected to the inner wall of the rear end cover of impeller A. One end of spring A is connected to the left section of piston A, and the other end is connected to the pressure cap.

[0034] Furthermore, piston A has a horizontally placed "King" shaped cross-section, divided into a left section, a middle section, and a right section. The lengths of all three sections are consistent with the diameters of the through holes A and B in the impeller A's rear end cover. The ends of both the left and right sections of piston A are equipped with stoppers with the same diameter as the through hole E in the impeller A's rear end cover, but with a smaller center diameter than E. The diameter of the middle section of piston A is consistent with the diameter of the through hole E in the impeller A's rear end cover, but larger than the diameters of the left and right sections. The middle section of piston A can block either the through hole A or B in the impeller A's rear end cover. The left and right sections of piston A can open either the through hole A or B in the impeller A's rear end cover.

[0035] Piston B has a horizontally placed "I"-shaped cross-section, consisting of a left section, a middle section, and a right section. The lengths of all three sections match the diameters of the through holes C and D in the impeller A's rear end cover. The diameters of the left and right sections match the diameter of the through hole G in the impeller A's rear end cover, but are larger than the diameter of the middle section. The middle section of piston B can open either the through hole C or D in the impeller A's rear end cover. The left and right sections of piston B can block either the through hole C or D in the impeller A's rear end cover.

[0036] When the coolant flow direction of the connecting pipe between Region III and Region II is positive, impeller B rotates positively, driving the worm wheel to rotate positively. The worm wheel and worm are driven by a worm wheel-worm gear transmission. The worm drives piston A and piston B to move to the left. Under the action of the spring force at both ends, they finally reach the leftmost position. At this time, the middle section of piston A is located in the through hole A of the rear end cover of impeller A, blocking the through hole A. The right section of piston A is located in the through hole B of the rear end cover of impeller A, opening the through hole B. The middle section of piston B is located in the through hole C of the rear end cover of impeller A, opening the through hole C. The right section of piston B is located in the through hole D of the rear end cover of impeller A, blocking the through hole D.

[0037] When the coolant flow direction of the connecting pipe between Region III and Region II is reversed, impeller B rotates in the reverse direction, driving the worm wheel to rotate in the reverse direction. The worm wheel and worm are driven by a worm gear transmission. The worm drives piston A and piston B to move to the right. Under the action of the spring force at both ends, they finally reach the rightmost position. At this time, the middle section of piston A is located in the through hole B of the rear end cover of impeller A, blocking the through hole B of the rear end cover of impeller A. The left section of piston A is located in the through hole A of the rear end cover of impeller A, opening the through hole A of the rear end cover of impeller A. The middle section of piston B is located in the through hole D of the rear end cover of impeller A, opening the through hole D of the rear end cover of impeller A. The left section of piston B is located in the through hole C of the rear end cover of impeller A, blocking the through hole C of the rear end cover of impeller A.

[0038] The above setup achieves the following effect: A portion of the coolant flows from region II to region III through the through-hole G in the rear end cover of impeller A, the through-hole A in the front cover of impeller B, the through-hole F in the rear end cover of impeller A, and the hose. During this process, this portion of the liquid pushes impeller B, located in the through-hole G in the rear end cover of impeller A, to rotate clockwise. Impeller B is coaxially arranged with the worm gear, which also rotates clockwise. The worm gear and worm are driven by a worm gear transmission; the worm will move to the left, and under the action of the spring forces at both ends, it will eventually reach the leftmost position.

[0039] At this time, pistons A and B stop at the corresponding positions of impeller A rear end cover through hole A, impeller A rear end cover through hole B, impeller A rear end cover through hole C, and impeller A rear end cover through hole D, respectively; the middle section of piston A is located at impeller A rear end cover through hole A, the right section of piston A is located at impeller A rear end cover through hole B, the middle section of piston B is located at impeller A rear end cover through hole C, and the right section of piston B is located at impeller A rear end cover through hole D; at this time, impeller A rear end cover through hole A is closed, impeller A rear end cover through hole B is open, impeller A rear end cover through hole C is open, and impeller A rear end cover through hole D is closed.

[0040] The main flow direction of the coolant is: Zone I, through hole B of the rear end cover of impeller A, through hole A of the front end cover of impeller A, impeller A, through hole C of the rear end cover of impeller A, Zone II; impeller A rotates continuously together with the motor shaft, pressurizing the incoming flow, and in this process, the coolant in Zone I is pressurized into Zone II.

[0041] Ignoring the small proportion of losses in the overall cycle, the flow path in the reverse cycle is: circulating power source (thrust disc), cooling water pipe, zone III, zone II, zone I, motor air gap, circulating power source (thrust disc).

[0042] At this point, some coolant flows from region III to region II through the hose, the through-hole F in the rear cover of impeller A, the through-hole A in the front cover of impeller B, and the through-hole G in the rear cover of impeller A. During this process, this portion of liquid pushes impeller B, located in the through-hole G in the rear cover of impeller A, to rotate counterclockwise. Impeller B is coaxially arranged with the worm gear, which also rotates counterclockwise. The worm gear and worm are driven by a worm gear transmission, and the worm will move to the right, eventually reaching the rightmost position under the action of the spring forces at both ends.

[0043] At this time, pistons A and B stop at the corresponding positions of impeller A rear end cover through hole A, impeller A rear end cover through hole B, impeller A rear end cover through hole C, and impeller A rear end cover through hole D, respectively; the left section of piston A is located at impeller A rear end cover through hole A, the middle section of piston A is located at impeller A rear end cover through hole B, the left section of piston B is located at impeller A rear end cover through hole C, and the middle section of piston B is located at impeller A rear end cover through hole D; at this time, impeller A rear end cover through hole A is open, impeller A rear end cover through hole B is closed, impeller A rear end cover through hole C is closed, and impeller A rear end cover through hole D is open.

[0044] The main flow direction of the coolant is: Region II, through hole D of the rear end cover of impeller A, through hole B of the front end cover of impeller A, impeller A, through hole A of the rear end cover of impeller A, Region I; impeller A rotates continuously together with the motor shaft, pressurizing the incoming flow, and in this process, the coolant in Region II is pressurized into Region I.

[0045] Furthermore, the impeller B is connected to the rear cover of the impeller B via an auxiliary shaft, a bushing B, and a mating moving ring C and a stationary ring C;

[0046] The impeller B rear cover is provided with a central hole;

[0047] The auxiliary shaft is installed in the center hole of the rear cover of the impeller B via bushing B;

[0048] The impeller B is installed in the center hole of the rear cover of the impeller B by being sleeved on the auxiliary shaft;

[0049] The moving ring C is fastened to one end of the bushing B, and the stationary ring C is installed inside the center hole of the impeller B rear cover. The stationary ring C passes through the auxiliary shaft from bottom to top and the moving ring C to complete the positioning assembly and installation.

[0050] Furthermore, the worm gear is mounted on the lower end of the auxiliary shaft and is fixedly connected to the auxiliary shaft.

[0051] Furthermore, the differential pressure reversing mechanism also includes a front cover for impeller B and a rear cover for impeller B disposed next to impeller B;

[0052] The rear end cover of impeller A is assembled and connected to the inner wall of the motor through the moving ring A and the stationary ring A, and the moving ring A and the stationary ring A are sealed together.

[0053] The front end cover of impeller A and the stationary ring B are fastened together. The right end of the front end cover of impeller A and the rear end cover of impeller A are assembled and connected. The rotating ring B and the stationary ring B are sealed together.

[0054] The above settings are intended to facilitate operation, installation, and subsequent maintenance. If the difficulty of operation is not a concern, the rear end cover of impeller A and the front cover of impeller B can be integrated into one unit.

[0055] Furthermore, the rear end cover of impeller A is also provided with a rear end cover through hole F and a rear end cover through hole G;

[0056] The front cover of impeller B is provided with a through hole A for the front cover of impeller B;

[0057] One end of the through hole F of the rear end cover of impeller A is connected to a flexible hose, and the other end is connected to the through hole A of the front cover of impeller B.

[0058] One end of the through hole G in the rear cover of impeller A is connected to the through hole A in the front cover of impeller B, and the other end is connected to region II.

[0059] In a second aspect, the present invention provides an electric motor, including a commutation and boosting structure for the internal coolant of the motor as described in the first aspect.

[0060] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0061] The present invention provides a commutation and pressurization structure for the internal coolant of an electric motor and an electric motor, which can increase the pressure of the coolant in the motor cavity according to the change of the direction of the internal circulation of the motor, thereby overcoming the internal resistance of the motor cavity, ensuring smooth circulation, ensuring the reliability of the motor, and achieving energy saving and emission reduction. Attached Figure Description

[0062] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0063] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0064] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0065] Figure 4 for Figure 3 Enlarged view of point C in the middle;

[0066] Figure 5 for Figure 3 Enlarged view at point D;

[0067] Figure 6 The figure shows the hole location distribution diagram of this embodiment;

[0068] Figure 7 This represents the coolant flow path during positive circulation.

[0069] Figure 8 This is the coolant flow path during reverse circulation;

[0070] Figure 9 This is a schematic diagram of the overall structure of the motor.

[0071] The components are: 1. Motor main shaft; 2. Shaft sleeve A; 3. Impeller A; 4. Moving ring A; 5. Stationary ring A; 6. Front cover of impeller A; 7. Moving ring B; 8. Stationary ring B; 9. Rear cover of impeller A; 10. Front cover of impeller B.

[0072] 11. Motor inner wall; 12. Hose; 13. Impeller B; 14. Shaft sleeve B; 15. Auxiliary shaft; 16. Impeller B rear cover; 17. Stationary ring C; 18. Moving ring C; 19. Worm gear; 20. Worm; 21. Piston A; 22. Spring A; 23. Pressure cap; 24. Piston B; 25. Spring B; 26. Motor pressure cap; 27. Stationary ring D;

[0073] 601. Through hole A of the front end cover of impeller A; 602. Through hole B of the front end cover of impeller A;

[0074] 901. Through hole A of the rear end cover of impeller A; 902. Through hole B of the rear end cover of impeller A;

[0075] 903. Through hole C in the rear end cover of impeller A; 904. Through hole D in the rear end cover of impeller A;

[0076] 905. Through hole E at the rear end cover of impeller A; 906. Through hole F at the rear end cover of impeller A;

[0077] 907. Impeller A rear end cover through hole G; 1001. Impeller B front cover through hole A;

[0078] 2601, Motor cover through hole A; 2602, Motor cover through hole B. Detailed Implementation

[0079] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0080] In the description of this embodiment, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this embodiment.

[0081] Example 1:

[0082] This embodiment provides a commutation and pressurization structure for the internal coolant of an electric motor, including:

[0083] From left to right, the motor cavity is divided into region I, region II, and region III. Region I and region II are separated by the main structure provided by this invention, and region II and region III are separated by the motor cover 26 provided by this invention. In a normal motor structure, all three regions are referred to as the motor cavity. Region I and region II are conventionally called the left motor cavity, and region III is called the right motor cavity.

[0084] Ignoring the small proportion of losses in the overall cycle, in the forward cycle, the flow path is: circulating power source (thrust disc), motor air gap, region I, region II, region III, cooling water pipe, circulating power source (thrust disc).

[0085] In reverse circulation, the flow path is: circulating power source (thrust disc), cooling water pipe, zone III, zone II, zone I, motor air gap, circulating power source (thrust disc).

[0086] Starting from right to left, with the motor spindle 1 as the positioning point, install bushing A2.

[0087] The rotating ring A4 is fastened to the left side of the motor main shaft 1, and the left end of the impeller A3 is fastened to the right end of the rotating ring A4. The rotating ring B7 is fastened to the right side of the motor main shaft 1.

[0088] The moving ring C18 is fastened to one end of the bushing B14, and the stationary ring C17 is installed inside the center hole of the impeller B rear cover 16.

[0089] From top to bottom, assemble the auxiliary shaft 15, along with the rotating ring C18, to the center hole of the impeller B rear cover 16. The rotating ring C18 and stationary ring C17 are then positioned. From bottom to top, the stationary ring D27 passes through the auxiliary shaft 15 and is positioned with the rotating ring C18. Finally, install the worm gear 19 to the lower end of the auxiliary shaft 15.

[0090] Install the impeller B13 onto the auxiliary shaft 15 from top to bottom, and position it at the shaft end with the shaft sleeve B14.

[0091] The impeller B rear cover 16 is fastened to the impeller A rear end cover 9, and is installed at the center hole of the impeller A rear end cover 9.

[0092] The front cover 10 of impeller B is installed at the upper part of the inlet position of impeller B13. The front cover 10 of impeller B is assembled and connected with the rear cover 9 of impeller A.

[0093] The left end of the worm gear 20 is fastened to piston A21, and the right end is fastened to piston B24; the worm gear 20 and the worm wheel 19 perform worm gear transmission.

[0094] From left to right, the cross-section of piston A21 is horizontally shaped like a "king" and can be divided into piston A left section, piston A middle section and piston A right section. The length of the three sections is consistent with the diameters of holes 901 and 902. The diameter of piston A middle section is consistent with the diameter of hole 905 and is larger than the diameters of piston A left section and piston A right section.

[0095] From left to right, the cross-section of piston B24 is horizontally placed in the shape of an "I". It can be divided into piston B left section, piston B middle section and piston B right section. The length of the three sections is consistent with the diameters of holes 903 and 904. The diameters of piston B left section and piston B right section are consistent with the diameter of hole 905, which is larger than the diameter of piston B middle section.

[0096] The impeller A rear end cover 9 is assembled and connected to the inner wall 11 of the motor, while the moving ring A4 and the stationary ring A5 are sealed together.

[0097] The front end cover 6 of impeller A and the stationary ring B8 are fastened together. The front end cover 6 of impeller A and the right end of the rear end cover 9 of impeller A are assembled and connected. The rotating ring B7 and the stationary ring B8 are sealed together.

[0098] The impeller A rear end cover 9 has the following through holes: A901, B902, C903, D904, E905, F906, and G907.

[0099] One end of the through hole A901 in the rear end cover of impeller A is connected to region I, and the other end is connected to the outlet region of impeller A3;

[0100] One end of the through hole B902 of the rear end cover of impeller A is connected to region I, and the other end is connected to one end of the through hole A601 of the front end cover of impeller A. The through hole B902 of the rear end cover of impeller A is not connected to the outlet part of impeller A3.

[0101] One end of the through hole C903 at the rear end of impeller A is connected to region II, and the other end is connected to the outlet region of impeller A3;

[0102] One end of the through hole D904 at the rear end of impeller A is connected to region II, and the other end is connected to one end of the through hole B602 at the front end of impeller A.

[0103] The through-hole E905 of the impeller A rear end cover is located in the impeller A rear end cover 9. The right section of the through-hole E905 is closed by the impeller A rear end cover 9 itself. From right to left, spring B25, piston B24, worm gear 20, piston A21, spring A22, and pressure cap 23 are installed sequentially. The left end is closed by pressure cap 23. Spring B25 is connected at one end to the right section of piston B24 and at the other end to the inner wall of the impeller A rear end cover 9. Spring A22 is connected at one end to the left section of piston A21 and at the other end to pressure cap 23.

[0104] One end of the through hole F906 at the rear end of impeller A is connected to hose 12, and the other end is connected to the through hole A1001 at the front end of impeller B.

[0105] One end of the through hole G907 of the rear end cover of impeller A is connected to the through hole A1001 of the front cover of impeller B, and the other end is connected to area II;

[0106] The front end cover 6 of impeller A has a through hole A601 and a through hole B602.

[0107] One end of the through hole B602 of the front end cover of impeller A is connected to one end of the through hole D904 of the rear end cover of impeller A, and the other end is connected to the inlet of impeller A3;

[0108] One end of the through hole A601 of the front end cover of impeller A is connected to one end of the through hole B902 of the rear end cover of impeller A, and the other end is connected to the inlet of impeller A3;

[0109] Impeller B front cover 10 has an impeller B front cover through hole A1001;

[0110] One end of the through hole A1001 of the front cover of impeller B is connected to the through hole F906 of the rear cover of impeller A, and the other end is connected to the through hole G907 of the rear cover of impeller A.

[0111] The motor cover 26 has a motor cover through hole A2601 and a motor cover through hole B2602.

[0112] One end of the motor cover through hole A2601 is connected to the flexible hose 12, and the other end is connected to area III;

[0113] The motor cover through hole B2602 is connected to area II at one end and area III at the other end;

[0114] Implementation principle:

[0115] Ignoring the small proportion of losses in the overall cycle, in the forward cycle, the flow path is: circulating power source (thrust disc), motor air gap, region I, region II, region III, cooling water pipe, circulating power source (thrust disc).

[0116] At this time, some coolant flows from region II to region III through the through-hole G907 of the impeller A rear end cover, the through-hole A1001 of the impeller B front cover, the through-hole F906 of the impeller A rear end cover, and the hose 12. During this process, this portion of liquid pushes the impeller B13 located in the through-hole G907 of the impeller A rear end cover to rotate clockwise. The impeller B13 is coaxially arranged with the worm gear 19, and the worm gear 19 rotates clockwise. The worm gear 19 and the worm 20 are driven by a worm gear transmission. The worm gear 20 will move to the left, and under the action of the spring forces at both ends, it will eventually be located at the leftmost position.

[0117] At this time, pistons A21 and B24 stop at the corresponding impeller A rear end cover through holes A901, B902, C903, and D904, respectively; the middle section of piston A21 is located at impeller A rear end cover through hole A901, and the right section of piston A21 is located at impeller A rear end cover through hole B902; the middle section of piston B24 is located at impeller A rear end cover through hole C903, and the right section of piston B24 is located at impeller A rear end cover through hole D904; at this time, impeller A rear end cover through hole A901 is closed, impeller A rear end cover through hole B902 is open, impeller A rear end cover through hole C903 is open, and impeller A rear end cover through hole D904 is closed.

[0118] The main flow direction of the coolant is: Zone I, through hole B902 of the rear end cover of impeller A, through hole A601 of the front end cover of impeller A, impeller A3, through hole C903 of the rear end cover of impeller A, Zone II; impeller A3 rotates continuously together with the motor main shaft 1, pressurizing the incoming flow, and in this process, the coolant in Zone I is pressurized into Zone II.

[0119] Ignoring the small proportion of losses in the overall cycle, the flow path in the reverse cycle is: circulating power source (thrust disc), cooling water pipe, zone III, zone II, zone I, motor air gap, circulating power source (thrust disc).

[0120] At this time, some coolant flows from region III to region II through hose 12, through the through hole F906 in the rear end cover of impeller A, through the through hole A1001 in the front cover of impeller B, and through the through hole G907 in the rear end cover of impeller A. During this process, this portion of liquid pushes impeller B13, located in the through hole G907 in the rear end cover of impeller A, to rotate counterclockwise. Impeller B13 is coaxially arranged with worm gear 19, and worm gear 19 rotates counterclockwise. Worm gear 19 and worm 20 are driven by a worm gear transmission. Worm gear 20 will move to the right and, under the action of the spring forces at both ends, will eventually be located at the rightmost position.

[0121] At this time, pistons A21 and B24 stop at the corresponding impeller A rear end cover through holes A901, B902, C903, and D904 positions, respectively; the left section of piston A21 is located at impeller A rear end cover through hole A901, and the middle section of piston A21 is located at impeller A rear end cover through hole B902; the left section of piston B24 is located at impeller A rear end cover through hole C903, and the middle section of piston B24 is located at impeller A rear end cover through hole D904; at this time, impeller A rear end cover through hole A901 is open, impeller A rear end cover through hole B902 is closed, impeller A rear end cover through hole C903 is closed, and impeller A rear end cover through hole D904 is open.

[0122] The main flow direction of the coolant is: Region II, through hole D 904 of the rear end cover of impeller A, through hole B 602 of the front end cover of impeller A, impeller A3, through hole A 901 of the rear end cover of impeller A, Region I; impeller A3 rotates continuously together with the motor main shaft 1 to pressurize the incoming flow, and in this process, the coolant in Region II is pressurized into Region I.

[0123] Example 2:

[0124] This embodiment provides a motor, including the commutation boosting structure of the motor as described in Embodiment 1.

[0125] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0126] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0127] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0128] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0129] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A commutation and pressurization structure for internal coolant in an electric motor, characterized in that, It is installed in the inner cavity of the motor, and the inner cavity of the motor is arranged in the order of forward circulation of coolant as region I, region II and region III; Zone III is separated from Zone II by a motor cover; Zone I and Zone II are separated by a reversing booster structure. The commutation booster structure includes: Internal piping, which connects region I and region II, is used to direct coolant from region I to region II or from region II to region I; A pressurizing device, connected to the internal piping, is used to pressurize the coolant inside the internal piping; The differential pressure reversing mechanism is used to switch the coolant pressurization direction of the internal pipeline to either forward or reverse based on the pressure difference between Zone II and Zone III. When the coolant pressure in Zone II is greater than that in Zone III, the internal pipeline coolant pressurization direction is switched to forward, causing Zone I to pressurize the coolant in Zone II. When the coolant pressure in Zone II is less than that in Zone III, the internal pipeline coolant pressurization direction is switched to reverse, causing Zone II to pressurize the coolant in Zone I. The pressurizing device includes an impeller A connected to the motor main shaft via a bushing A; The differential pressure reversing mechanism includes: Impeller B is fixedly installed on the connecting pipe between Zone III and Zone II, and can rotate in the forward or reverse direction with the flow of coolant in the connecting pipe between Zone III and Zone II. The worm gear is connected to the bottom of the impeller and rotates with the impeller. The worm gear is fastened to piston A at its left end and to piston B at its right end; the worm gear and worm wheel perform worm gear transmission. Piston A is used to block the through hole A of the rear end cover of impeller A while opening the through hole B of the rear end cover of impeller A as the worm moves; or to block the through hole B of the rear end cover of impeller A while opening the through hole A of the rear end cover of impeller A. Piston B is used to block the through hole C of the rear end cover of impeller A while opening the through hole D of the rear end cover of impeller A, or to block the through hole D of the rear end cover of impeller A while opening the through hole C of the rear end cover of impeller A.

2. The reversing and pressurizing structure for the internal coolant of the motor according to claim 1, characterized in that, The commutation and boosting structure also includes an impeller A front end cover and an impeller A rear end cover disposed inside the motor; The internal piping includes impeller A rear end cover through hole A, impeller A rear end cover through hole B, impeller A rear end cover through hole C, impeller A rear end cover through hole D, impeller A rear end cover through hole E, impeller A rear end cover through hole F and impeller A rear end cover through hole G, as well as impeller A front end cover through hole A and impeller A front end cover through hole B, which are provided in the impeller A front end cover. One end of the through hole A of the rear end cover of impeller A is connected to region I, and the other end is connected to the outlet region of impeller A; One end of the through hole B of the rear end cover of impeller A is connected to region I, and the other end is connected to one end of the through hole A of the front end cover of impeller A. The through hole B of the rear end cover of impeller A is not connected to the outlet part of impeller A. One end of the through hole C of the rear end cover of impeller A is connected to region II, and the other end is connected to the outlet region of impeller A; One end of the through hole D of the rear end cover of impeller A is connected to region II, and the other end is connected to one end of the through hole B of the front end cover of impeller A; One end of the through hole B of the front cover of impeller A is connected to one end of the through hole D of the rear cover of impeller A, and the other end is connected to the inlet of impeller A; One end of the through hole A at the front end of impeller A is connected to one end of the through hole B at the rear end of impeller A, and the other end is connected to the inlet of impeller A.

3. The reversing and pressurizing structure for the internal coolant of the motor according to claim 1, characterized in that, The differential pressure reversing mechanism further includes: The through hole E of the rear end cover of impeller A is set in the rear end cover of impeller A and is connected to the through holes A, B, C and D of the rear end cover of impeller A respectively. The right section of the through hole E at the rear end of impeller A is closed by the rear end cover itself, and spring B, piston B, worm gear, piston A, spring A and pressure cap are installed in sequence inside it; the left end is closed by the pressure cap. One end of spring B is connected to the right section of piston B, and the other end is connected to the inner wall of the rear end cover of impeller A; one end of spring A is connected to the left section of piston A, and the other end is connected to the pressure cap.

4. The reversing and pressurizing structure for the internal coolant of the motor according to claim 3, characterized in that, Piston A has a horizontally placed "King" shaped cross-section, including a left section, a middle section, and a right section. The lengths of the left, middle, and right sections are all consistent with the diameters of the through holes A and B of the impeller A rear end cover. The ends of the left and right sections of piston A are equipped with stoppers with the same diameter as the through hole E of the impeller A rear end cover, and their center diameters are smaller than the diameter of the through hole E. The diameter of the middle section of piston A is consistent with the diameter of the through hole E of the impeller A rear end cover, but larger than the diameters of the left and right sections. When the middle section of piston A is located in either the through hole A or the through hole B of the impeller A rear end cover, it can block either the through hole A or the through hole B. When the left and right sections of piston A are located in either the through hole A or the through hole B of the impeller A rear end cover, they can open either the through hole A or the through hole B. Piston B has a horizontally placed "I"-shaped cross-section, comprising a left section, a middle section, and a right section. The lengths of these three sections are consistent with the diameters of the through holes C and D of the impeller A's rear end cover. The diameters of the left and right sections of piston B are consistent with the diameter of the through hole G of the impeller A's rear end cover, but larger than the diameter of the middle section. When the middle section of piston B is located in either the through hole C or D of the impeller A's rear end cover, it can open either the through hole C or D. When the left and right sections of piston B are located in either the through hole C or D of the impeller A's rear end cover, they can block either the through hole C or D. When the coolant flow direction of the connecting pipe between Region III and Region II is positive, impeller B rotates positively, driving the worm wheel to rotate positively. The worm wheel and worm are driven by a worm wheel-worm gear transmission. The worm drives piston A and piston B to move to the left. Under the action of the spring force at both ends, they finally reach the leftmost position. At this time, the middle section of piston A is located in the through hole A of the rear end cover of impeller A, blocking the through hole A. The right section of piston A is located in the through hole B of the rear end cover of impeller A, opening the through hole B. The middle section of piston B is located in the through hole C of the rear end cover of impeller A, opening the through hole C. The right section of piston B is located in the through hole D of the rear end cover of impeller A, blocking the through hole D. When the coolant flow direction of the connecting pipe between Region III and Region II is reversed, impeller B rotates in the reverse direction, driving the worm wheel to rotate in the reverse direction. The worm wheel and worm are driven by a worm gear transmission. The worm drives piston A and piston B to move to the right. Under the action of the spring force at both ends, they finally reach the rightmost position. At this time, the middle section of piston A is located in the through hole B of the rear end cover of impeller A, blocking the through hole B of the rear end cover of impeller A. The left section of piston A is located in the through hole A of the rear end cover of impeller A, opening the through hole A of the rear end cover of impeller A. The middle section of piston B is located in the through hole D of the rear end cover of impeller A, opening the through hole D of the rear end cover of impeller A. The left section of piston B is located in the through hole C of the rear end cover of impeller A, blocking the through hole C of the rear end cover of impeller A.

5. The reversing and pressurizing structure for the internal coolant of the motor according to claim 4, characterized in that, The impeller B is connected to the rear cover of the impeller B via an auxiliary shaft, a bushing B, and a mating moving ring C and a stationary ring C. The impeller B rear cover is provided with a central hole; The auxiliary shaft is installed in the center hole of the rear cover of the impeller B via bushing B; The impeller B is installed in the center hole of the rear cover of the impeller B by being sleeved on the auxiliary shaft; The moving ring C is fastened to one end of the bushing B, and the stationary ring C is installed inside the center hole of the impeller B rear cover. The stationary ring C passes through the auxiliary shaft from bottom to top and the moving ring C to complete the positioning assembly and installation.

6. The reversing and pressurizing structure for the internal coolant of the motor according to claim 5, characterized in that, The worm gear is mounted on the lower end of the auxiliary shaft and is fixedly connected to the auxiliary shaft.

7. The reversing and pressurizing structure for the internal coolant of the motor according to claim 1, characterized in that, The differential pressure reversing mechanism also includes a front cover for impeller B and a rear cover for impeller B disposed next to impeller B; The rear end cover of impeller A is assembled and connected to the inner wall of the motor through the moving ring A and the stationary ring A, and the moving ring A and the stationary ring A are sealed together. The front end cover of impeller A and the stationary ring B are fastened together. The right end of the front end cover of impeller A and the rear end cover of impeller A are assembled and connected. The rotating ring B and the stationary ring B are sealed together.

8. The reversing and pressurizing structure for the internal coolant of the motor according to claim 1, characterized in that, The impeller A rear end cover is also provided with an impeller A rear end cover through hole F and an impeller A rear end cover through hole G; The front cover of impeller B is provided with a through hole A for the front cover of impeller B; One end of the through hole F of the rear end cover of impeller A is connected to a flexible hose, and the other end is connected to the through hole A of the front cover of impeller B. One end of the through hole G in the rear cover of impeller A is connected to the through hole A in the front cover of impeller B, and the other end is connected to region II.

9. An electric motor, characterized in that, Including the reversing and pressurizing structure for the internal coolant of the motor as described in any one of claims 1-8.

Images