High-stability cooling pump for motor

Abstract

The invention discloses a high-stability cooling pump for a motor, and belongs to the technical field of water pumps. A locking sleeve tightly arranged on a water pump shaft in a sleeving mode is additionally arranged on a drainage impeller, and a plurality of pressing bent pipes distributed with impeller blades in a staggered mode are annularly distributed on the locking sleeve; the inner end of the pressing bent pipe is not arranged in a protruding mode, flexible sleeving between the drainage impeller and the water pump shaft is not affected, when the pump body is in a working state, part of cooling liquid guided into the drainage impeller is guided into a water passing cavity formed in the end of the water pump shaft, and the cooling liquid is guided into the pressing bent pipe at a high speed through the drainage hole under the action of centrifugal force; the cooling liquid presses the piston to move towards the inner side of the pressing bent pipe, the filler is extruded to one end of the elastic sleeve, the bottom end of the elastic sleeve extrudes towards one side of the pressing cavity along with the filler, and therefore high-stability insertion connection between the pressing bent pipe and the water pump shaft during centrifugal work is achieved, and it is effectively guaranteed that the drainage impeller is not prone to being disengaged from the water pump shaft under high-speed rotation.

Description

Technical Field

[0001] The present application relates to the technical field of water pumps, and more specifically, to a high-stability cooling pump that solves the problem of easy loosening of existing drainage impellers. Background Art

[0002] The motor cooling pump is a device used to cool the motor. The motor will generate heat during operation. If the heat cannot be dissipated in time, the motor temperature will be too high, affecting the performance and life of the motor. The function of the motor cooling pump is to transport coolant (such as water or cooling oil) into the motor, and take away the heat generated by the motor through the flow of coolant, thereby reducing the temperature of the motor.

[0003] The invention patent CN201710788567.3 specification discloses a multi-stage self-cooling water pump with adjustable displacement, including a water suction port, a lower pump body, a first impeller group, a second impeller group, a cooling channel, an upper pump body, an end cover, a rotating shaft, a rotor, a stator, a drain hole, a drain pipe, a water outlet, a water inlet, a motor housing, a cooling pipe, a fixed sleeve, a filter layer and a filter sleeve. The present invention can use the same equipment to provide different drainage level operation modes according to the needs of the working environment. By switching different drainage levels and setting cooling channels, the water pump can work uninterruptedly. After a long period of high-power operation, the working pressure of the water pump can be relieved by switching to small-radius blades in combination with the cooling channel.

[0004] However, the drainage impeller and the drive shaft of the existing pump body are generally connected by a fixed sleeve, and the drainage impeller is installed on the drive shaft by using a nut to cooperate with the thread on the drive shaft. When the drainage impeller rotates continuously for a long time, it is easy to loosen, thereby failing to ensure long-term stable operation. For this reason, we propose a high-stability cooling pump for a motor to effectively solve some practical problems existing in the prior art. Summary of the invention

[0005] The purpose of the present application is to solve the problem that the connection between the existing drainage impeller and the drive shaft is prone to loosening. Compared with the existing technology, a high-stability cooling pump for a motor is provided, including a pump body with a water inlet pipe and a water outlet pipe, the motor driving end of the pump body is connected to a water pump shaft, the front end of the water pump shaft extends to the inner end of the water inlet pipe, and a drainage impeller is installed at the front end of the water pump shaft. The drainage impeller includes a locking sleeve and a threaded sleeve connected front and back, a plurality of impeller blades are annularly distributed on the locking sleeve, the threaded sleeve is threadedly connected to the end wall of the water pump shaft, and a plurality of compression bends with staggered distribution of impeller blades are annularly embedded on the end wall of the locking sleeve. The inner end of the compression elbow is flush with the inner end wall of the locking sleeve, a water passage cavity is provided at the water pump shaft port, a plurality of drainage holes and compression cavities corresponding to the position of the compression elbow are provided in an annular manner on the outer end wall of the water pump shaft, and the drainage holes are connected with the water passage cavity, and the two ends of the compression elbow are respectively connected with the drainage holes and the compression cavity, an elastic piston assembly is movably connected inside the compression elbow near the drainage hole, an elastic sleeve initially located inside the compression elbow is fixedly connected to the end of the compression elbow near the compression cavity, and a filler filled inside the compression elbow is provided between the elastic sleeve and the piston;

[0006] By adding a locking sleeve tightly fitted on the water pump shaft to the drainage impeller, a plurality of compression elbows are distributed in an annular manner on the locking sleeve and are staggered with the impeller blades. The setting of the compression elbow does not affect the flexible sleeve between the drainage impeller and the water pump shaft. When the pump body is in working condition, part of the coolant introduced into the drainage impeller is introduced into the water passage cavity opened at the end of the water pump shaft. Under the action of centrifugal force, the coolant is introduced into the compression elbow through the drainage hole, and the piston is pressed to move toward the inside of the compression elbow, squeezing the filler to one end of the elastic sleeve, and the bottom end of the elastic sleeve is pressed toward one side of the compression cavity together with the filler, thereby realizing a highly stable connection between the compression elbow and the water pump shaft, and effectively ensuring that the drainage impeller is not easily separated from the water pump shaft under high-speed rotation.

[0007] Furthermore, the compression elbow close to the drainage hole and one end of the compression cavity are straight pipes, and the portion between a pair of straight pipes is a curved pipe.

[0008] Furthermore, the elastic piston assembly includes a piston movably connected to the inside of the compression elbow, and the piston is fixedly connected to the inner wall of the outer port of the compression elbow through a plurality of elastic tubes.

[0009] Furthermore, the filler is selected from any one of aqueous solution and gas. In the initial state, relying on the balancing effect of the elastic tube and the elastic sleeve, the filler is stably stored inside the compression elbow. When the pump body is in working condition, part of the coolant introduced into the drainage impeller is introduced into the water passage cavity, and is introduced into the compression elbow through the drainage hole under the action of centrifugal force, pressing the piston inward to move. After the piston moves in the compression elbow, it squeezes the filler to one end of the elastic sleeve, and the bottom end of the elastic sleeve is pressed toward one side of the compression cavity along with the filler, thereby realizing a highly stable connection between the compression elbow and the water pump shaft, effectively ensuring that the drainage impeller is not easily separated from the water pump shaft under high-speed rotation.

[0010] Furthermore, the elastic sleeve is a bag structure made of elastic material, and a plurality of anti-slip protrusions are distributed on the bottom end wall of the elastic sleeve. When the elastic sleeve is in squeeze contact with the compression cavity, the added anti-slip protrusions further enhance the connection stability between the two. When the centrifugal force is lost, the piston is reset under the elastic action of the elastic tube. At the same time, the elastic sleeve also squeezes the filler back and resets it, restoring the initial state of the inside of the compression elbow.

[0011] Optionally, a compression seat is provided on the bottom fixing sleeve of the elastic sleeve close to the compression chamber, and a conical sleeve seat matching the compression seat is fixedly connected inside the compression chamber.

[0012] Furthermore, the conical sleeve seat is a hollow conical structure that is wide on the outside and narrow on the inside. The inner wall of the conical sleeve seat is covered with an anti-slip pad. Compared with the flexible elastic sleeve, the connection between the clamping seat and the conical sleeve seat is beneficial to improving the stability of the connection between the drainage impeller and the water pump shaft.

[0013] Optionally, a balancing wire is connected between the piston and the inner bottom of the elastic sleeve, a magnetic block is fixed on the balancing wire, and a magnetic material that magnetically repels the magnetic block is embedded in the clamping seat.

[0014] Furthermore, the magnetic block is arranged close to one end of the drainage hole in an initial state, and the outer diameter of the magnetic block is smaller than the inner diameter of the compression elbow.

[0015] Furthermore, a magnetic isolation layer is provided on the outer end wall of the compression elbow, and the magnetic isolation layer is made of magnetic shielding material. A balancing wire is added between the piston and the elastic sleeve. When the piston moves into the compression elbow, the balancing wire is squeezed toward the elastic sleeve together with the filler. At the same time, the magnetic block on the balancing wire crosses the elbow and is in a straight line opposite to the compression seat on the elastic sleeve. At this time, the magnetic shielding effect of the magnetic isolation layer on the magnetic block is weakened. Relying on the magnetic repulsion of the magnetic block on the compression seat, the compression seat is pushed into the conical sleeve seat, which effectively enhances the stability of the insertion connection.

[0016] Compared with the prior art, the advantages of this application are:

[0017] (1) This scheme adds a locking sleeve to the drainage impeller, which is tightly fitted on the water pump shaft. The locking sleeve is annularly distributed with multiple compression elbows that are staggered with the impeller blades. The setting of the compression elbow does not affect the flexible sleeve between the drainage impeller and the water pump shaft. When the pump body is in working condition, part of the coolant introduced into the drainage impeller is introduced into the water passage cavity opened at the end of the water pump shaft. Under the action of centrifugal force, the coolant is introduced into the compression elbow through the drainage hole, and the piston is pressed to move toward the inside of the compression elbow, squeezing the filler to one end of the elastic sleeve. The bottom end of the elastic sleeve is pressed toward one side of the compression cavity together with the filler, thereby realizing a highly stable connection between the compression elbow and the water pump shaft, effectively ensuring that the drainage impeller is not easily separated from the water pump shaft under high-speed rotation.

[0018] (2) The compression elbow near the drain hole and one end of the compression cavity are straight tubes, and a curved tube is provided between the pair of straight tubes. The elastic piston assembly includes a piston movably connected to the inside of the compression elbow, and the piston is fixedly connected to the inner wall of the outer port of the compression elbow through multiple elastic tubes. The specific bending structure of the compression elbow reduces the installation area on the one hand, and relies on centrifugal force to throw the coolant from the inside of the water pump shaft into the compression elbow on the other hand, and then uses the high-speed introduced coolant to compress the initial filling and the filling inside it to one side of the water pump shaft, so as to achieve a stable connection between the compression elbow and the water pump shaft.

[0019] (3) The elastic sleeve is a bag structure made of elastic material, and a plurality of anti-skid protrusions are distributed on the bottom end wall of the elastic sleeve. When the elastic sleeve is in squeeze contact with the compression cavity, the added anti-skid protrusions further enhance the connection stability between the two. When the centrifugal force is lost, the piston is reset under the elastic action of the elastic tube. At the same time, the elastic sleeve also squeezes the filler back and resets it, restoring the initial state of the inside of the compression elbow.

[0020] (4) A clamping seat is provided at the bottom fixed sleeve of the elastic sleeve near the clamping chamber, and a conical sleeve seat matching the clamping seat is fixedly connected inside the clamping chamber. The conical sleeve seat is a hollow conical structure that is wide outside and narrow inside. The inner wall of the conical sleeve seat is covered with an anti-slip pad. Compared with the flexible elastic sleeve, the connection between the clamping seat and the conical sleeve seat is beneficial to improving the stability of the connection between the drainage impeller and the water pump shaft.

[0021] (5) A balancing wire is connected between the piston and the bottom of the elastic sleeve. A magnetic block is fixed on the balancing wire. A magnetic material that repel the magnetic block is embedded inside the clamping seat. The magnetic block is initially arranged near one end of the drain hole. The outer diameter of the magnetic block is smaller than the inner diameter of the clamping elbow. A magnetic isolation layer is arranged on the outer end wall of the clamping elbow. The magnetic isolation layer is made of magnetic shielding material. A balancing wire is added between the piston and the elastic sleeve. When the piston moves into the clamping elbow, the balancing wire is squeezed toward one side of the elastic sleeve together with the filler. At the same time, the magnetic block on the balancing wire crosses the elbow and is in a straight line opposite to the clamping seat on the elastic sleeve. At this time, the magnetic shielding effect of the magnetic isolation layer on the magnetic block is weakened. Relying on the magnetic repulsion of the magnetic block on the clamping seat, the clamping seat is pushed into the conical sleeve seat, which effectively enhances the stability of the insertion connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A partial internal perspective view of the present application;

[0023] Figure 2 This is a schematic diagram of the structure of the junction between the drainage impeller and the water pump shaft of the present application;

[0024] Figure 3 This is a schematic diagram of the structure when the drainage impeller of the present application is detached from the water pump shaft;

[0025] Figure 4 This is a schematic diagram of the structure of the drainage impeller of this application;

[0026] Figure 5 A partial cross-sectional view of the drainage impeller of the present application;

[0027] Figure 6 A partial cross-sectional view of the drainage impeller of the present application when in operation;

[0028] Figure 7 for Figure 6 Schematic diagram of the structure at A in the middle;

[0029] Figure 8 This is a schematic diagram of the structure after a compression seat and a conical sleeve seat are added in Example 2 of the present application;

[0030] Fig. 9 This is a schematic diagram of the structure of the water pump shaft and the tapered sleeve seat in Example 2 of the present application;

[0031] Fig.10 This is a schematic diagram of the structure after adding a balancing wire and a magnetic block in Example 3 of the present application;

[0032] Fig.11 for Fig.10 Schematic diagram of the structure at B in the figure.

[0033] Description of the numbers in the figure:

[0034] 1 pump body, 101 water inlet pipe, 102 water outlet pipe, 2 water pump shaft, 201 drainage hole, 202 pressing chamber, 3 drainage impeller, 31 locking sleeve, 32 threaded sleeve, 33 impeller blade, 4 pressing elbow, 5 piston, 6 elastic tube, 7 elastic sleeve, 8 balancing wire, 9 magnetic block, 10 pressing seat, 11 tapered sleeve seat. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work based on the embodiments in the present application are within the scope of protection of this application.

[0036] The first implementation method:

[0037] This application discloses a high stability cooling pump for a motor, see Figure 1-3 , including a pump body 1 with a water inlet pipe 101 and a water outlet pipe 102, the motor driving end of the pump body 1 is connected to a water pump shaft 2, the front end of the water pump shaft 2 extends to the inner end of the water inlet pipe 101, and a drainage impeller 3 is installed at the front end of the water pump shaft 2. The drainage impeller 3 includes a locking sleeve 31 and a threaded sleeve 32 connected front and back. A plurality of impeller blades 33 are distributed in an annular manner on the locking sleeve 31. The threaded sleeve 32 is threadedly connected to the end wall of the water pump shaft 2, and a plurality of impeller blades 33 are embedded in an annular manner on the end wall of the locking sleeve 31. The compression elbow 4 is staggeredly distributed with the pieces 33. The compression elbow 4 is a straight pipe near the drain hole 201 and the compression cavity 202. The portion between the pair of straight pipes is a curved pipe. The inner end of the compression elbow 4 is flush with the inner end wall of the locking sleeve 31. During installation, the threaded sleeve 32 is threadedly connected to the water pump shaft 2. The locking sleeve 31 is in close contact with the outer end wall of the water pump shaft 2. The compression elbow 4 is arranged on the inner side of the locking sleeve 3, which does not affect the flexible installation of the drainage impeller 3. Please refer to Figure 5-6 A water passage cavity is provided at the port of the water pump shaft 2, and a plurality of drainage holes 201 and a compression cavity 202 corresponding to the position of the compression elbow 4 are provided in an annular manner on the outer end wall of the water pump shaft 2, and the drainage holes 201 are connected to the water passage cavity, and the two ends of the compression elbow 4 are respectively connected to the drainage holes 201 and the compression cavity 202.

[0038] See also Figure 4-7 An elastic piston assembly is movably connected inside the compression bend 4 near the drain hole 201, and an elastic sleeve 7 initially located inside the compression bend 4 is fixedly connected to one end of the compression bend 4 near the compression chamber 202. A filler filled inside the compression bend 4 is provided between the elastic sleeve 7 and the piston 5, and the filler can be selected from any one of an aqueous solution and a gas.

[0039] The elastic piston assembly includes a piston 5 movably connected to the inside of the compression elbow 4. The piston 5 is fixedly connected to the inner wall of the outer port of the compression elbow 4 through a plurality of elastic tubes 6. In the initial state, the filler is stably stored in the compression elbow 4 by relying on the balancing effect of the elastic tube 6 and the elastic sleeve 7. When the pump body 1 is in a working state, part of the coolant introduced into the drainage impeller 3 is introduced into the water passage cavity. Under the action of centrifugal force, the coolant is introduced into the compression elbow 4 at a high speed through the drainage hole 201, and presses the piston 5 inward to move. After the piston 5 moves at one end of the straight tube of the compression elbow 4, it squeezes the filler to one end of the elastic sleeve 7. The bottom end of the elastic sleeve 7 is pressed toward one side of the compression cavity 202 with the filler. The elastic sleeve 7 contacts the compression cavity 202 under the extrusion of the filler, thereby realizing a highly stable connection between the compression elbow 4 and the water pump shaft 2, and effectively ensuring that the drainage impeller 3 is not easily separated from the water pump shaft 2 under high-speed rotation.

[0040] The elastic sleeve 7 is a bag structure made of elastic material. The inner end of the elastic sleeve 7 is fixedly connected to the inner wall of the compression elbow 4. A plurality of anti-slip protrusions are distributed on the bottom end wall of the elastic sleeve 7. When the elastic sleeve 7 is in compression contact with the compression cavity 202, the added anti-slip protrusions further enhance the connection stability between the two. When the centrifugal force is lost, the piston 5 is reset under the elastic action of the elastic tube 6. At the same time, the elastic sleeve 7 also squeezes the filler back and resets it to restore the initial state inside the compression elbow 4. When the pump body 1 is working, the centrifugal force is used to introduce part of the coolant into the compression elbow 4 at high speed, so as to realize the interpenetration connection between the filler in the compression elbow 4 and the elastic sleeve 7 and the water pump shaft 2.

[0041] The second implementation method:

[0042] The difference between this embodiment and embodiment 1 is that: this embodiment adds a clamping seat 10 and a conical sleeve seat 11 on the basis of embodiment 1, and the remaining structure is consistent with embodiment 1, specifically as follows: a clamping seat 10 is fixedly sleeved on the bottom end of the elastic sleeve 7 close to the clamping cavity 202, and a conical sleeve seat 11 matching the clamping seat 10 is fixedly connected inside the clamping cavity 202. The conical sleeve seat 11 is a hollow conical structure that is wide outside and narrow inside, and the inner wall of the conical sleeve seat 11 is covered with an anti-slip pad. When the clamping seat 10 is gradually squeezed toward the conical sleeve seat 11, compared with the flexible elastic sleeve 7, the insertion of the clamping seat 10 and the conical sleeve seat 11 is more conducive to improving the stability of the connection between the drainage impeller 3 and the water pump shaft 2.

[0043] The third implementation method:

[0044] The difference between this embodiment and embodiment 2 is that: this embodiment adds a balancing wire 8 and a magnetic block 9 on the basis of embodiment 2, and the rest of the structure is consistent with embodiment 2, specifically as follows: a balancing wire 8 is connected between the piston 5 and the inner bottom of the elastic sleeve 7, a magnetic block 9 is fixedly sleeved on the balancing wire 8, a magnetic material that magnetically repels the magnetic block 9 is embedded in the clamping seat 10, the outer diameter of the magnetic block 9 is smaller than the inner diameter of the clamping elbow 4, a magnetic isolation layer is sleeved on the outer end wall of the clamping elbow 4, and the magnetic isolation layer is made of magnetic shielding material, and the magnetic block 9 is arranged near one end of the drain hole 201 in the initial state, that is, the magnetic block 9 is located on the other side of the elbow, and it is non-linearly opposed to the clamping seat 10, so that the magnetic isolation layer can have a certain shielding effect on the magnetic repulsion between the magnetic block 9 and the clamping seat 10;

[0045] A balancing wire 8 is added between the piston 5 and the elastic sleeve 7. When the piston 5 moves toward the inside of the compression elbow 4, the balancing wire 8 approaches the elastic sleeve 7 together with the filler. At the same time, the magnetic block 9 on the balancing wire 8 passes over the elbow and is in a straight line opposite to the compression seat 10 on the elastic sleeve 7. At this time, the magnetic shielding effect of the magnetic isolation layer on the magnetic block 9 is weakened. Relying on the magnetic repulsion of the magnetic block 9 on the compression seat 10, the compression seat 10 is pushed into the conical sleeve seat 11, which effectively enhances the stability of the insertion connection.

[0046] The above is only a preferred specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed in the present application according to the technical solution and improved ideas of the present application, which should be covered by the protection scope of the present application.

Claims

1. A high-stability cooling pump for a motor, comprising a pump body (1) with a water inlet pipe (101) and a water outlet pipe (102), wherein the motor drive end of the pump body (1) is connected to a water pump shaft (2), the front end of the water pump shaft (2) extends to the inner end of the water inlet pipe (101), and a drainage impeller (3) is installed at the front end of the water pump shaft (2), characterized in that: The drainage impeller (3) comprises a locking sleeve (31) and a threaded sleeve (32) connected front and rear, a plurality of impeller blades (33) are distributed in an annular manner on the locking sleeve (31), the threaded sleeve (32) is threadedly connected to the end wall of the water pump shaft (2), a compression elbow (4) with a plurality of impeller blades (33) distributed in an alternating manner is embedded in an annular manner on the end wall of the locking sleeve (31), and the inner end of the compression elbow (4) is flush with the inner end wall of the locking sleeve (31); A water passage cavity is provided at the port of the water pump shaft (2); a plurality of drainage holes (201) and a compression cavity (202) corresponding to the positions of the compression elbow (4) are provided in an annular manner on the outer end wall of the water pump shaft (2); the drainage holes (201) are connected to the water passage cavity; the two ends of the compression elbow (4) are respectively connected to the drainage holes (201) and the compression cavity (202); an elastic piston assembly is movably connected inside the compression elbow (4) at one end close to the drainage hole (201); an elastic sleeve (7) initially located inside the compression elbow (4) is fixedly connected at one end of the compression elbow (4) close to the compression cavity (202); a filling member is provided between the elastic sleeve (7) and the piston (5). A filler is filled in the compression elbow (4); a compression seat (10) is fixedly provided at the bottom end of the elastic sleeve (7) close to the compression chamber (202); a conical sleeve seat (11) matching the compression seat (10) is fixedly connected inside the compression chamber (202); a balancing wire (8) is connected between the piston (5) and the bottom of the elastic sleeve (7); a magnetic block (9) is fixedly provided on the balancing wire (8); a magnetic material that repel the magnetic block (9) is embedded inside the compression seat (10); the magnetic block (9) is arranged close to one end of the drain hole (201) in the initial state; and the outer diameter of the magnetic block (9) is smaller than the inner diameter of the compression elbow (4).

2. A high stability cooling pump for a motor according to claim 1, characterized in that: The compression elbow (4) is a straight pipe at one end close to the drainage hole (201) and the compression cavity (202), and the portion between the pair of straight pipes is a curved pipe.

3. The high stability cooling pump for a motor according to claim 1, characterized in that: The elastic piston assembly comprises a piston (5) movably connected to the interior of the compression elbow (4); the piston (5) is fixedly connected to the inner wall of the outer port of the compression elbow (4) via a plurality of elastic tubes (6).

4. The high stability cooling pump for a motor according to claim 1, characterized in that: The filler can be any one of aqueous solution and gas.

5. The high stability cooling pump for a motor according to claim 1, characterized in that: The elastic sleeve (7) is a bagging structure made of elastic material, and a plurality of anti-slip protrusions are distributed on the bottom end wall of the elastic sleeve (7).

6. The high stability cooling pump for a motor according to claim 1, characterized in that: The conical sleeve seat (11) is a hollow conical structure that is wide on the outside and narrow on the inside, and the inner wall of the conical sleeve seat (11) is covered with an anti-slip pad.

7. The high stability cooling pump for a motor according to claim 1, characterized in that: The outer end wall of the compression bent pipe (4) is sleeved with a magnetic isolation layer, and the magnetic isolation layer is made of magnetic shielding material.

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