Forced circulation pump for faster motor cooling

Abstract

The present invention discloses a forced circulation pump capable of accelerating the cooling of a motor, comprising: a pump body, an axle box, a driving motor, a transmission shaft and a cooling jacket; wherein the cooling jacket is arranged between the pump body and the axle box, and the first end and the second end of the cooling jacket are respectively fixedly connected to the fixed part of the pump body and the fixed part of the axle box; the cooling jacket is provided with a cooling chamber, the first end of the transmission shaft is drivingly connected to the driving motor, and the second end of the transmission shaft is drivingly connected to the pump body after passing through the axle box and the cooling jacket in sequence; the cooling jacket is provided with a cooling medium inlet and a cooling medium outlet connected to the cooling chamber. The present invention achieves the purpose of introducing cooling medium into the cooling chamber by using the cooling medium inlet during the operation of the pump body, and the cooling medium in the cooling chamber cools the part of the transmission shaft located between the pump body and the driving motor, thereby achieving the technical effect of reducing the heat transfer from the transmission shaft to the driving motor and reducing the influence of the temperature of the transmission shaft on the driving motor, thereby solving the technical problem in the related art that the heat of the pump body during the operation is transferred to the driving motor through the transmission shaft, affecting the normal operation of the driving motor.

Description

Technical Field

[0001] The invention relates to the technical field of circulating pumps, and in particular to a forced circulating pump capable of accelerating the cooling of a motor. Background Art

[0002] A forced circulation pump (PMP force circulation) is a machine that uses liquid to circulate continuously in a closed container to transfer energy to the fluid and prevent the fluid from solidifying.

[0003] Its working principle is: when the liquid enters the pump body, the pressure of the liquid increases due to the energy conversion between the driving machine and the pump. When the pressure increases to a certain value, the flow rate of the liquid flowing into the pump is continuously increased by adjusting the control device (changing the opening of the valve); at the same time, the heat of the liquid is transferred from the pump body to the motor.

[0004] When a forced circulation pump is used to transport high-temperature media, the pump body will heat up due to the influence of the medium temperature and the friction during rotation. The rising temperature will be transmitted to the transmission shaft, and then to the drive motor through the transmission shaft, thereby affecting the operation of the drive motor. In addition, due to the influence of temperature, the selection of the drive motor is also subject to temperature restrictions. Summary of the invention

[0005] The main purpose of the present invention is to provide a forced circulation pump that can accelerate the cooling of the motor, so as to solve the technical problem in the related art that the heat of the pump body during operation will be transferred to the drive motor through the transmission shaft, affecting the normal operation of the drive motor.

[0006] In order to achieve the above-mentioned object, the present invention provides a forced circulation pump capable of accelerating motor cooling, comprising: a pump body, an axle box, a drive motor, a transmission shaft and a cooling jacket; wherein:

[0007] The cooling jacket is arranged between the pump body and the axle box, and the first end and the second end of the cooling jacket are fixedly connected to the fixing part of the pump body and the fixing part of the axle box respectively;

[0008] The cooling jacket is provided with a cooling cavity, the first end of the transmission shaft is transmission-connected to the driving motor, and the second end of the transmission shaft passes through the axle box and the cooling jacket in sequence and is transmission-connected to the pump body;

[0009] The cooling jacket is provided with a cooling medium inlet and a cooling medium outlet which are communicated with the cooling cavity.

[0010] Furthermore, the cooling cavity includes a first cavity, which is configured as a flat annular cavity and is arranged around the circumference of the transmission shaft, and two ends of the first cavity are respectively connected to the cooling medium inlet and the cooling medium outlet.

[0011] Further, the first cavity includes a first annular surface and a second annular surface which are arranged opposite to each other and distributed in the radial direction, and the distance between the first annular surface and the second annular surface gradually increases from the first end to the second end of the cooling jacket, so that the width of the first cavity gradually increases;

[0012] The portion of the first cavity connected to the cooling medium inlet and the portion connected to the cooling medium outlet are both located at an end of the first cavity with a larger width.

[0013] Furthermore, the first annular surface is closer to the transmission shaft than the second annular surface, a generatrix of the first annular surface is parallel to the axis of the transmission shaft, and a generatrix of the second annular surface forms an acute angle with the axis of the transmission shaft.

[0014] Furthermore, the cooling jacket is provided with a through shaft hole, and the transmission shaft passes through the shaft hole and is clearance-matched with the shaft hole;

[0015] The first cavity is arranged outside the shaft hole and close to the shaft hole in radial direction.

[0016] Furthermore, a first flow channel and a second flow channel are provided in the cooling jacket, wherein the first end of the first flow channel is connected to the cooling medium inlet, the second end of the first flow channel is connected to the first end of the first cavity, the first end of the second flow channel is connected to the cooling medium outlet, and the second end of the second flow channel is connected to the second end of the first cavity.

[0017] Furthermore, the cooling cavity further comprises a second cavity, the first cavity is located at the second end of the cooling jacket and communicates with the shaft hole, and the transmission shaft passes through the second cavity;

[0018] Two ends of the second cavity are connected to the cooling medium inlet and the cooling medium outlet respectively.

[0019] Further, the second cavity includes a first slot body and a second slot body opened at the second end of the cooling jacket, the second slot body is located in the middle of the cooling jacket and communicated with the shaft hole, the transmission shaft passes through the second slot body, and the first slot body is configured as an annular groove and is located outside the second slot body;

[0020] The two ends of the first tank body are respectively connected to the cooling medium inlet and the cooling medium outlet;

[0021] Two ends of the first flow channel are respectively connected to the first cavity and the first slot, and two ends of the second flow channel are respectively connected to the first cavity and the first slot;

[0022] A third flow channel and a fourth flow channel are further provided in the cooling jacket. Two ends of the third flow channel are respectively connected to the first trough body and the second trough body. Two ends of the fourth flow channel are respectively connected to the first trough body and the second trough body.

[0023] Furthermore, a sliding bearing is arranged in the axle box, the sliding bearing is sleeved on the transmission shaft, at least a part of the sliding bearing is located in the second groove body and is clearance-matched with the second groove body.

[0024] Further, the first end and the second end of the cooling jacket are respectively provided with a first installation step and a second installation step;

[0025] The end of the pump body is provided with a third mounting step, and the end of the axle box is provided with a fourth mounting step;

[0026] The first mounting step and the third mounting step are plug-in assembled on the shaft, and the second mounting step and the fourth mounting step are plug-in assembled in the axial direction;

[0027] The axle box and the pump body are connected via flange bolts, and the cooling jacket is pressed between the pump body and the axle box.

[0028] Furthermore, a plurality of heat dissipation grooves are provided on the ring side of the cooling jacket.

[0029] In an embodiment of the present invention, a pump body, an axle box, a drive motor, a transmission shaft and a cooling jacket are provided; wherein the cooling jacket is provided between the pump body and the axle box, and the first end and the second end of the cooling jacket are fixedly connected to the fixed part of the pump body and the fixed part of the axle box respectively; a cooling chamber is provided in the cooling jacket, the first end of the transmission shaft is transmission-connected to the drive motor, and the second end of the transmission shaft is transmission-connected to the pump body after passing through the axle box and the cooling jacket in sequence; a cooling medium inlet and a cooling medium outlet communicated with the cooling chamber are provided on the cooling jacket, on the one hand, during the operation of the pump body, the cooling medium inlet is used to pass the cooling medium into the cooling chamber, and the cooling medium in the cooling chamber is used to cool the part of the transmission shaft located between the pump body and the drive motor, thereby achieving the technical effect of reducing the heat transfer from the transmission shaft to the drive motor, reducing the influence of the temperature of the transmission shaft on the drive motor, and accelerating the cooling of the drive motor, thereby solving the technical problem in the related technology that the heat of the pump body during operation is transmitted to the drive motor through the transmission shaft, affecting the normal operation of the drive motor.

[0030] On the other hand, since the heat transfer from the transmission shaft to the drive motor can be reduced through the cooling jacket, the selection of the drive motor is freer and more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention, so that other features, purposes and advantages of the present invention become more obvious. The accompanying drawings of the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 is a schematic cross-sectional view of a forced circulation pump capable of accelerating motor cooling according to an embodiment of the present invention;

[0033] Figure 2 is a schematic cross-sectional view of a forced circulation pump capable of accelerating motor cooling according to an embodiment of the present invention;

[0034] Among them, 1 pump body, 2 shaft box, 3 transmission shaft, 4 cooling jacket, 40 cooling cavity, 401 first cavity, 4011 first annular surface, 4012 second annular surface, 402 second cavity, 4020 first trough body, 4021 second trough body, 5 cooling medium inlet, 6 cooling medium outlet, 7 heat dissipation groove, 8 third flow channel, 9 fourth flow channel, 10 sliding bearing, 11 first installation step, 12 second installation step, 13 third installation step, 14 fourth installation step, 15 sealing ring, 16 bearing cover. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged under appropriate circumstances to facilitate the embodiments of the present invention described herein.

[0037] In the present invention, the directions or positional relationships indicated by the terms "upper", "lower", "inner", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0038] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0039] In addition, the terms "disposed", "provided with", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, the term "plurality" shall mean two or more.

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] The forced circulation pump in the related technology mainly includes a pump body, an axle box, and a drive motor, which are connected by a transmission shaft. The drive motor drives the transmission shaft to rotate, and the transmission shaft drives the impeller in the pump body to rotate to pump the medium. When the forced circulation pump is used to transport high-temperature media, the pump body will heat up due to the influence of the medium temperature and the friction during the rotation process. The rising temperature will be transmitted to the transmission shaft, and then to the drive motor through the transmission shaft, thereby affecting the operation of the drive motor. In addition, the selection of the drive motor is also limited by the temperature due to the influence of temperature.

[0043] To solve the above technical problems, Figure 1 As shown, an embodiment of the present invention provides a forced circulation pump capable of accelerating motor cooling, comprising: a pump body 1, an axle box 2, a drive motor, a transmission shaft 3 and a cooling jacket 4; wherein,

[0044] The cooling jacket 4 is disposed between the pump body 1 and the axle box 2, and the first end and the second end of the cooling jacket 4 are fixedly connected to the fixed part of the pump body 1 and the fixed part of the axle box 2 respectively;

[0045] The cooling jacket 4 is provided with a cooling cavity 40, the first end of the transmission shaft 3 is transmission-connected to the driving motor, and the second end of the transmission shaft 3 passes through the axle box 2 and the cooling jacket 4 in sequence and is transmission-connected to the pump body 1;

[0046] The cooling jacket 4 is provided with a cooling medium inlet 5 and a cooling medium outlet 6 which are communicated with the cooling cavity 40 .

[0047] In this embodiment, in order to reduce the heat conduction from the transmission shaft 3 to the drive motor, it is necessary to cool the portion of the transmission shaft 3 located between the pump body 1 and the drive motor separately. In this embodiment, a cooling jacket 4 is provided between the pump body 1 and the axle box 2 to cool the portion of the transmission shaft 3.

[0048] Specifically, in this embodiment, the cooling sleeve 4 is installed as a sleeve between the pump body 1 and the axle box 2, the first end of the transmission shaft 3 is transmission-connected to the drive motor, and the second end of the transmission shaft 3 passes through the axle box 2 and the cooling sleeve 4 in sequence and is transmission-connected to the pump body 1. A cooling chamber 40 is provided in the cooling sleeve 4, as well as a cooling medium inlet 5 and a cooling medium outlet 6 communicated with the cooling chamber 40. During the operation of the pump body 1, a cooling medium, such as cooling water or cooling gas, can be introduced into the cooling chamber 40 through the cooling medium inlet 5. After entering the cooling chamber 40, the cooling medium can exchange heat with the transmission shaft 3, thereby taking away the heat of the transmission shaft 3 and reducing the temperature of the transmission shaft 3. The cooling medium after heat exchange is discharged through the cooling medium outlet 6.

[0049] In this embodiment, the cooling medium inlet 5 can be connected to the outlet of the external heat exchange device, and the cooling medium outlet 6 can be connected to the inlet of the external heat exchange device. The cooling cavity 40 can be a cavity provided in the cooling jacket 4 for the transmission shaft 3 to pass through, or a cavity provided in the cooling jacket 4 but separated from the transmission shaft 3, or a combination of the above two methods, which is not limited in this embodiment.

[0050] On the one hand, this embodiment achieves the purpose of using the cooling medium inlet 5 to pass the cooling medium into the cooling chamber 40 during the operation of the pump body 1, and the cooling medium in the cooling chamber 40 cools the part of the drive shaft 3 located between the pump body 1 and the drive motor, thereby achieving the technical effect of reducing the heat transfer from the drive shaft 3 to the drive motor, reducing the influence of the temperature of the drive shaft 3 on the drive motor, and accelerating the cooling of the drive motor, thereby solving the technical problem in the related art that the heat of the pump body 1 during operation will be transferred to the drive motor through the drive shaft 3, affecting the normal operation of the drive motor.

[0051] On the other hand, since the heat transfer from the transmission shaft 3 to the drive motor can be reduced by the cooling jacket 4, the selection of the drive motor is freer and more flexible.

[0052] In addition, it should be noted that the shaft box 2 of the forced circulation pump in the related art has a cavity at one end close to the pump body 1. When improving the forced circulation pump in the related art, the length of the cavity can be reduced, and a cooling jacket 4 can be additionally arranged, that is, the length of the cooling jacket 4 is close to the reduced cavity length, so that the overall shape and size of the improved forced circulation pump are close to or consistent with those of the forced circulation pump in the related art, so that the improved forced circulation pump that can accelerate motor cooling can be directly installed in existing equipment or operating environment for use.

[0053] Furthermore, in order to further improve the cooling effect of the cooling jacket 4, in this embodiment, a plurality of heat dissipation grooves 7 are provided on the ring side of the cooling jacket 4, and the contact area between the cooling jacket 4 and the air can be increased through the heat dissipation grooves 7, thereby improving the heat dissipation effect of the cooling jacket 4, and further improving the cooling effect of the cooling jacket 4 on the transmission shaft 3. In this embodiment, the heat dissipation grooves 7 can be annular grooves.

[0054] Further, such as Figure 1 As shown, the cooling cavity 40 includes a first cavity 401, which is configured as a flat annular cavity and is arranged around the circumference of the transmission shaft 3, and both ends of the first cavity 401 are respectively connected to the cooling medium inlet 5 and the cooling medium outlet 6.

[0055] Specifically, it should be noted that in order to improve the heat exchange efficiency of the cooling medium in the cooling chamber 40, in the present embodiment, the cooling chamber 40 includes a flat first cavity 401, and the first cavity 401 is arranged around the drive shaft 3. The radial width of the first cavity 401 is relatively small. After the cooling medium fills the first cavity 401, a thinner heat exchange layer can be formed in the first cavity 401. The thinner heat exchange layer can quickly exchange heat with the drive shaft 3 and quickly heat up to the set temperature before being discharged, thereby accelerating the flow speed of the cooling medium in the first cavity 401, thereby accelerating the heat exchange efficiency of the drive shaft 3, and the cooling medium after heat exchange can reach the set temperature, thereby improving the temperature utilization rate of the cooling medium.

[0056] Furthermore, the maximum width of the first cavity 401 is one fifth to one tenth of the diameter of the transmission shaft 3. Under this size, the cooling medium in the first cavity 401 has a better heat exchange efficiency.

[0057] In order to increase the travel of the cooling medium in the first cavity 401 , the openings on the first cavity 401 for the cooling medium to flow in and out are located at two distal positions on the first cavity 401 .

[0058] Further, such as Figure 1As shown, the first cavity 401 includes a first annular surface 4011 and a second annular surface 4012 which are arranged opposite to each other and distributed in the radial direction, and the distance between the first annular surface 4011 and the second annular surface 4012 gradually increases from the first end to the second end of the cooling jacket 4, so that the width of the first cavity 401 gradually increases;

[0059] The portion of the first cavity 401 connected to the cooling medium inlet 5 and the portion connected to the cooling medium outlet 6 are both located at the end of the first cavity 401 with a larger width.

[0060] On the basis that the first cavity 401 is set as a flat cavity, the first cavity 401 has a variety of structural forms. In one embodiment, the first cavity 401 is a straight annular cavity, that is, the two annular surfaces in the first cavity 401 are parallel. In another embodiment, the first cavity 401 is a conical cavity, that is, the two annular surfaces in the first cavity 401 are not parallel. After the two annular surfaces are not parallel, the widths of the two ends of the first cavity 401 are different. When the end with a larger width is used as the cooling medium to flow in and the cooling medium to flow out, it is conducive to the flow of the cooling medium, thereby further improving the heat exchange efficiency.

[0061] Further, such as Figure 1 As shown, the first annular surface 4011 is closer to the transmission shaft 3 than the second annular surface 4012, the generatrix of the first annular surface 4011 is parallel to the axis of the transmission shaft 3, and the generatrix of the second annular surface 4012 forms an acute angle with the axis of the transmission.

[0062] Based on the implementation that the first annular surface 4011 and the second annular surface 4012 are not parallel, the first annular surface 4011 and the second annular surface 4012 have at least two configurations. In one implementation, the tangent plane of the first annular surface 4011 close to the transmission shaft 3 is a straight plane, that is, the generatrix of the first annular surface 4011 is parallel to the axis of the transmission shaft 3, and the tangent plane of the second annular surface 4012 is an inclined plane, that is, the generatrix of the second annular surface 4012 has a certain angle with the axis of the transmission shaft 3.

[0063] In another embodiment, the cross-section of the first annular surface 4011 is an inclined surface, and the cross-section of the second annular surface 4012 is a straight surface.

[0064] When the inflow and outflow ends of the cooling medium are both on the second annular surface 4012, as Figure 1 As shown, in this embodiment, the cross section of the first annular surface 4011 is preferably a straight surface, and the cross section of the second annular surface 4012 is an inclined surface, so as to be more conducive to the flow of the cooling medium.

[0065] Furthermore, the cooling jacket 4 is provided with a through shaft hole, and the transmission shaft 3 passes through the shaft hole and is in clearance fit with the shaft hole;

[0066] The first cavity 401 is disposed outside the shaft hole and close to the shaft hole in the radial direction.

[0067] Specifically, it should be noted that since the transmission shaft 3 needs to pass through the cooling jacket 4, an axially penetrating axial hole is provided in the cooling jacket 4 in this embodiment. After installation, the transmission shaft 3 passes through the axial hole and cooperates with the axial hole clearance, so that the rotation of the transmission shaft 3 will not have a direct effect on the cooling jacket 4.

[0068] In this embodiment, the first cavity 401 is configured as a cavity within the cooling jacket 4 but separated from the transmission shaft 3, and the cooling medium entering the first cavity 401 does not directly contact the transmission shaft 3. The cooling medium entering the first cavity 401 can cool the inner wall of the cooling jacket 4, that is, directly cool the shaft hole, and the cooled shaft hole can cool the area between the shaft hole and the transmission shaft 3, and then use this area to cool the transmission shaft 3.

[0069] To facilitate the connection between the first cavity 401 and the cooling medium inlet 5 and the cooling medium outlet 6, in this embodiment, a first flow channel and a second flow channel are arranged in the cooling sleeve 4, the first end of the first flow channel is connected to the cooling medium inlet 5, the second end of the first flow channel is connected to the first end of the first cavity 401, the first end of the second flow channel is connected to the cooling medium outlet 6, and the second end of the second flow channel is connected to the second end of the first cavity 401.

[0070] In this embodiment, the first flow channel and the second flow channel have multiple configurations. In one embodiment, the first flow channel and the second flow channel are channel structures disposed in the inner wall of the cooling jacket 4 , and a hole communicating with the first flow channel and the second flow channel is provided on the first cavity 401 .

[0071] In one embodiment of the cooling chamber 40, as Figure 1 As shown, the cooling cavity 40 further includes a second cavity 402, the first cavity 401 is located at the second end of the cooling jacket 4 and communicates with the shaft hole, and the transmission shaft 3 passes through the second cavity 402;

[0072] Two ends of the second cavity 402 are connected to the cooling medium inlet 5 and the cooling medium outlet 6 respectively.

[0073] In this embodiment, the first cavity 401 is located near the middle of the cooling jacket 4, and the second cavity 402 is located at the second end of the cooling jacket 4, that is, one end close to the axle box 2. The second cavity 402, as a part of the cooling cavity 40, also plays a role in cooling the transmission shaft 3. Therefore, in this embodiment, both ends of the second cavity 402 are also connected to the cooling medium inlet 5 and the cooling medium outlet 6. The difference from the first cavity 401 is that in this embodiment, the first cavity 401 is not directly connected to the shaft hole, while the second cavity 402 is directly connected to the shaft hole. Therefore, the cooling medium entering the second cavity 402 can enter the shaft hole and directly contact the transmission shaft 3.

[0074] Since the transmission shaft 3 and the shaft hole are clearance-matched, and in order to ensure the operating stability of the transmission shaft 3, the clearance between the shaft hole and the transmission shaft 3 cannot be too large. When the clearance is small, the cooling medium entering the clearance is affected by the rotation of the transmission shaft 3 and is difficult to flow smoothly for heat exchange. At this time, the cooling medium in the clearance can act as a heat-conducting medium between the transmission shaft 3 and the cooling sleeve 4, thereby exchanging heat with the cooling medium in the first cavity 401 through the inner wall of the shaft hole, thereby improving the cooling efficiency of the transmission shaft 3.

[0075] In one embodiment of the second cavity 402, as Figure 1 As shown, the second cavity 402 includes a first slot 4020 and a second slot 4021 opened at the second end of the cooling jacket 4, the second slot 4021 is located in the middle of the cooling jacket 4 and communicates with the shaft hole, the transmission shaft 3 passes through the second slot 4021, and the first slot 4020 is set as an annular groove and is located on the outside of the second slot 4021;

[0076] Both ends of the first tank body 4020 are connected to the cooling medium inlet 5 and the cooling medium outlet 6 respectively;

[0077] The two ends of the first flow channel are respectively connected to the first cavity 401 and the first slot 4020, and the two ends of the second flow channel are respectively connected to the first cavity 401 and the first slot 4020;

[0078] A third flow channel 8 and a fourth flow channel 9 are further provided in the cooling jacket 4 . The two ends of the third flow channel 8 are respectively connected to the first trough body 4020 and the second trough body 4021 . The two ends of the fourth flow channel 9 are respectively connected to the first trough body 4020 and the second trough body 4021 .

[0079] Specifically, in this embodiment, the external cooling medium enters the third flow channel 8 through the cooling medium inlet 5, and then flows into the first tank body 4020, the second tank body 4021, and the gap between the shaft hole and the transmission shaft 3 through the third flow channel 8. The cooling medium located in the second tank body 4021 and the gap between the shaft hole and the transmission shaft 3 then flows into the first tank body 4020 through the fourth flow channel 9 and is discharged from the cooling medium outlet 6.

[0080] In this embodiment, the third flow channel 8 and the fourth flow channel 9 also have a variety of structural forms. In one embodiment, the third flow channel 8 and the fourth flow channel 9 are both holes. The third flow channel 8 and the fourth flow channel 9 are distributed up and down, and the axis of the third flow channel 8 and the axis of the fourth flow channel 9 form a certain angle, so that in the direction from the first end to the second end of the cooling jacket 4, the axial distance between the third flow channel 8 and the fourth flow channel 9 gradually increases.

[0081] Since the forced circulation pump that can accelerate the cooling of the motor in this embodiment is improved on the basis of the forced circulation pump with a cavity at the front end in the related art, according to the structural characteristics of the forced circulation pump, a protruding sliding bearing is provided at the front end of the axle box 2, and the sliding bearing is sleeved on the transmission shaft 3. Therefore, in order to make the cooling jacket 4 adaptable to the axle box 2, as shown in FIG. Figure 1 As shown, in this embodiment, a sliding bearing 10 is arranged in the axle box 2, and the sliding bearing 10 is sleeved on the transmission shaft 3. At least a part of the sliding bearing 10 is located in the second groove body 4021 and has a clearance fit with the second groove body 4021.

[0082] Since the sliding bearing is located in the second slot body 4021, the cooling medium entering the second slot body 4021 can also cool the sliding bearing 10 and the transmission shaft 3 of this part, thereby further improving the cooling effect on the transmission shaft 3 and reducing heat conduction from the transmission shaft 3 to the drive motor.

[0083] In this embodiment, if Figure 2 As shown, the right end of the second trough body 4021 and the right end of the first trough body 4020 are both open structures. In order to close the opening structure after installation, a sealing ring is arranged between the right end of the first trough body 4020 and the axle box 2 in this embodiment. The sealing ring is used to seal the right end opening structure of the first trough body 4020, and the bearing cover is used to seal the right end of the second trough body 4021 and the axle box 2.

[0084] To facilitate the installation and removal of the cooling jacket 4, Figure 2 As shown, in this embodiment, a first installation step 11 and a second installation step 12 are respectively provided at the first end and the second end of the cooling jacket 4;

[0085] A third mounting step 13 is provided at the end of the pump body 1, and a fourth mounting step 14 is provided at the end of the axle box 2;

[0086] The first mounting step 11 and the third mounting step 13 are plug-in assembled on the shaft, and the second mounting step 12 and the fourth mounting step 14 are plug-in assembled in the axial direction;

[0087] The axle box 2 and the pump body 1 are connected by flange bolts, and the cooling jacket 4 is pressed between the pump body 1 and the axle box 2.

[0088] Specifically, in this embodiment, during installation, the first installation step 11 at the first end of the cooling jacket 4 can be docked to the third installation step 13 on the pump body 1, so that the two are positioned in the axial and radial directions, and then the fourth installation step 14 on the shaft box 2 can be docked to the second installation step 12 at the second end of the cooling jacket 4, so that the two are also positioned in the axial and radial directions, and finally the flange bolts are screwed into the shaft box 2 and the pump body 1, so that the shaft box 2 presses the cooling jacket 4 against the pump body 1. During disassembly, it is only necessary to unscrew the flange bolts to separate it from the pump body 1, and then the cooling jacket 4 can be removed after the shaft box 2 is pulled out axially.

[0089] In addition, it should be noted that the specific structural form and quantity of the first installation step 11, the second installation step 12, the third installation step 13 and the fourth installation step 14 are not limited in this embodiment and can be adjusted according to the actual forced circulation pump structure. This embodiment does not limit them.

[0090] In the related art, a cover is required at the right end of the pump body 1 to prevent leakage of the medium in the pump body 1. Since a cooling jacket 4 is provided at the right end of the pump body 1 in this embodiment, the left end surface of the cooling jacket 4 can be used as a cover to seal the right end of the pump body 1, so that the cooling jacket 4 can prevent leakage of the medium in the pump body 1 while cooling the transmission shaft 3. In this embodiment, the first mounting step 11 on the cooling jacket 4 can also achieve a sealing effect like a cover after cooperating with the third mounting step 13 on the pump body 1.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Within the spirit and principle of the present invention, any modification, equivalent replacement, improvement, etc. made shall be included in the protection scope of the present invention.

Claims

1. A forced circulation pump capable of accelerating motor cooling, characterized in that: include: Pump body, axle box, drive motor, transmission shaft and cooling jacket; among them, The cooling jacket is arranged between the pump body and the axle box, and the first end and the second end of the cooling jacket are fixedly connected to the fixing part of the pump body and the fixing part of the axle box respectively; A cooling cavity is provided in the cooling jacket, the first end of the transmission shaft is transmission-connected to the driving motor, and the second end of the transmission shaft passes through the axle box and the cooling jacket in sequence and is transmission-connected to the pump body; The cooling jacket is provided with a cooling medium inlet and a cooling medium outlet which are communicated with the cooling cavity; The cooling cavity comprises a first cavity, which is configured as a flat annular cavity and is arranged around the circumference of the transmission shaft, and two ends of the first cavity are respectively connected to the cooling medium inlet and the cooling medium outlet; The first cavity comprises a first annular surface and a second annular surface which are arranged opposite to each other and distributed in a radial direction, and the distance between the first annular surface and the second annular surface gradually increases from the first end to the second end of the cooling jacket, so that the width of the first cavity gradually increases; The portion of the first cavity connected to the cooling medium inlet and the portion connected to the cooling medium outlet are both located at the end of the first cavity with a larger width; The cooling jacket is provided with a first flow channel and a second flow channel, wherein a first end of the first flow channel is connected to the cooling medium inlet, a second end of the first flow channel is connected to the first end of the first cavity, a first end of the second flow channel is connected to the cooling medium outlet, and a second end of the second flow channel is connected to the second end of the first cavity; The cooling jacket is provided with a through shaft hole, and the transmission shaft passes through the shaft hole and is in clearance fit with the shaft hole; The first cavity is arranged outside the axial hole and close to the axial hole in radial direction; The cooling cavity further comprises a second cavity, the first cavity is located at the second end of the cooling jacket and communicates with the shaft hole, and the transmission shaft passes through the second cavity; Two ends of the second cavity are respectively connected to the cooling medium inlet and the cooling medium outlet; The second cavity comprises a first slot body and a second slot body opened at the second end of the cooling jacket, the second slot body is located in the middle of the cooling jacket and communicates with the shaft hole, the transmission shaft passes through the second slot body, and the first slot body is configured as an annular groove and is located outside the second slot body; The two ends of the first tank body are respectively connected to the cooling medium inlet and the cooling medium outlet; Two ends of the first flow channel are respectively connected to the first cavity and the first slot, and two ends of the second flow channel are respectively connected to the first cavity and the first slot; A third flow channel and a fourth flow channel are further provided in the cooling jacket. Two ends of the third flow channel are respectively connected to the first trough body and the second trough body. Two ends of the fourth flow channel are respectively connected to the first trough body and the second trough body.

2. The forced circulation pump capable of accelerating motor cooling according to claim 1, characterized in that: The first annular surface is closer to the transmission shaft than the second annular surface, a generatrix of the first annular surface is parallel to the axis of the transmission shaft, and a generatrix of the second annular surface forms an acute angle with the axis of the transmission shaft.

3. The forced circulation pump capable of accelerating motor cooling according to claim 2, characterized in that: A sliding bearing is arranged in the axle box, and the sliding bearing is sleeved on the transmission shaft. At least a part of the sliding bearing is located in the second groove body and is clearance-matched with the second groove body.

4. The forced circulation pump capable of accelerating motor cooling according to claim 1, characterized in that: The first end and the second end of the cooling jacket are respectively provided with a first installation step and a second installation step; The end of the pump body is provided with a third mounting step, and the end of the axle box is provided with a fourth mounting step; The first mounting step and the third mounting step are plug-in assembled on the shaft, and the second mounting step and the fourth mounting step are plug-in assembled in the axial direction; The axle box and the pump body are connected by flange bolts, and the cooling jacket is pressed between the pump body and the axle box; A plurality of heat dissipation grooves are provided on the ring side of the cooling jacket.

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