Bidirectional motor pump with cooling function

Abstract

The utility model discloses a bidirectional motor pump with a cooling function, which comprises a sealed outer shell, one end of a pump body is fixedly connected with a pump cover in a sealed manner, the other end of the pump body is fixedly connected with the sealed outer shell in a sealed manner, and a fixed part of a stator and rotor assembly is fixedly arranged on the inner wall of the sealed outer shell. The output portion of the stator and rotor assembly is fixedly arranged in the middle of the motor shaft, one end of the motor shaft is rotationally arranged at the bottom of the sealed outer shell, the other end of the motor shaft is fixedly connected with the gear assembly, the gear assembly is arranged in the pump body, and two hydraulic cavities are formed in the gear assembly. The two hydraulic cavities communicate with the interior of the sealed outer shell through two through flow channels correspondingly, and one-way valves flowing to the sides of the hydraulic cavities are arranged in the through flow channels in a sealed mode. The gear assembly can rotate bidirectionally under the action of the motor shaft, and liquid can enter the sealed outer shell to take away heat under the cooperation of the two through flow channels and the one-way valve, so that the stator and rotor assembly can be fully cooled, and the continuous working requirement can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to two -way motor pump field, especially in two -way motor pump with cooling function. BACKGROUND

[0002] The electric pump in prior art mostly is dry two -way electric pump, and the dry two -way electric pump is sealed between pump and motor, and the liquid of pump cannot enter into motor, and the motor can only be passive heat dissipation, and since the motor can generate a large amount of heat during long time operation, the method for solving is to use the motor of same volume and low power or not to work continuously for a long time, and in the use process, the two ways cannot meet the work needs. CONTENT OF UTILITY MODEL

[0003] The utility model aims at overcoming the insufficient of prior art, and provides two -way motor pump with cooling function.

[0004] The utility model aims at overcoming the insufficient of prior art, and provides two -way motor pump with cooling function.

[0005] Two -way motor pump with cooling function, including pump body, pump cover, sealed outer shell, motor shaft, check valve, gear assembly and stator rotor assembly, one end of the pump body is sealed and fixedly connected with the pump cover, the other end of the pump body is sealed and fixedly connected with the sealed outer shell, the fixed part of the stator rotor assembly is fixedly arranged on the inner wall of the sealed outer shell, the output part of the stator rotor assembly is fixedly arranged on the middle part of the motor shaft, one end of the motor shaft is rotatably arranged on the bottom of the sealed outer shell, the other end of the motor shaft is fixedly connected with the gear assembly after passing through the pump body, the gear assembly is arranged in the pump body, two hydraulic chambers are arranged in the gear assembly, two hydraulic chambers are communicated with the inside of the sealed outer shell through two through flow passages, the check valve of the flow direction of the hydraulic chamber side is sealedly arranged in the through flow passage.

[0006] Further, the stator rotor assembly includes motor stator and motor rotor, the motor stator is fixedly arranged on the inner wall of the sealed outer shell, and the motor rotor is fixedly arranged on the motor shaft and cooperates with the inner wall of the motor stator.

[0007] Further, the bottom of the sealed outer shell is provided with a mounting sleeve, and a deep groove ball bearing is arranged between the motor shaft and the mounting sleeve.

[0008] Further, a sealing ring is arranged between the pump body and the sealed outer shell.

[0009] Further, the gear assembly comprises a driving gear, a driven gear, a crescent plate, crescent side plates and a connecting block, the driven gear is rotationally arranged in the pump body, the driving gear is fixedly arranged on the motor shaft, the inner teeth of the driven gear are engaged with the outer teeth of the driving gear, the crescent plate is arranged between the driving gear and the driven gear, two crescent side plates are arranged on the outer wall of the crescent plate, the crescent plate is connected with the pump cover through the connecting block, and two hydraulic cavities are arranged at the two ends of the crescent plate.

[0010] Further, the two crescent side plates on the crescent plate are symmetrically arranged.

[0011] Further, two inlet and outlet oil channels are arranged on the pump cover, and the two inlet and outlet oil channels are matched with the two hydraulic cavities respectively.

[0012] Further, a through cable hole is arranged on the bottom of the sealing outer shell, and a power cable is sealingly arranged in the cable hole.

[0013] The beneficial effects of the utility model are:

[0014] 1) In the technology, the gear assembly can rotate bidirectionally under the action of the motor shaft, and under the cooperation of the two through-flow channels and the one-way valve, the liquid can enter the inside of the sealing outer shell to take away heat, so that the stator-rotor assembly can be fully cooled, and the continuous working requirement can also be met.

[0015] 2) In the technology, the motor shaft is arranged in the pump body and the sealing outer shell, and there is no leakage, so that the sealing can be better.

[0016] 3) In the technology, two crescent side plates are symmetrically arranged on the crescent plate, so that the gear assembly can better compensate during forward and reverse rotation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a three-dimensional connection structure diagram of the bidirectional motor pump;

[0018] Fig. 2 It is an internal connection structure diagram of the bidirectional motor pump;

[0019] Fig. 3 It is a three-dimensional connection structure diagram of the gear assembly;

[0020] In the drawing, 1 is a pump body, 2 is a pump cover, 3 is a sealing outer shell, 4 is a motor shaft, 5 is a one-way valve, 6 is a through-flow channel, 7 is a motor stator, 8 is a motor rotor, 9 is a mounting sleeve, 10 is a deep groove ball bearing, 11 is a sealing ring, 12 is a driving gear, 13 is a driven gear, 14 is a crescent plate, 15 is a crescent side plate, 16 is a connecting block, 17 is an inlet and outlet oil channel, and 18 is a cable hole. DETAILED DESCRIPTION

[0021] The technical solutions of the utility model will be described clearly and completely in combination with the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] With reference to Figs. 1-3 The utility model provides a technical scheme:

[0023] The utility model provides a bidirectional motor pump with cooling function, including pump body 1, pump cover 2, sealed outer casing 3, motor shaft 4, one way valve 5, gear assembly and stator rotor assembly, one end of pump body 1 is sealed and fixedly connected with pump cover 2, the other end of pump body 1 is sealed and fixedly connected with sealed outer casing 3, the fixed part of stator rotor assembly is fixedly arranged on the inner wall of sealed outer casing 3, the output part of stator rotor assembly is fixedly arranged on the middle part of motor shaft 4, one end of motor shaft 4 is rotatably arranged on the bottom of sealed outer casing 3, the other end of motor shaft 4 is fixedly connected with gear assembly after passing through pump body 1, and gear assembly is arranged in pump body 1, two hydraulic chambers are arranged in gear assembly, and two hydraulic chambers are communicated with the inside of sealed outer casing 3 through two through flow passages 6, one way valve 5 is sealedly arranged in through flow passage 6 and flows to the hydraulic chamber side, two inlet and outlet oil channels 17 are arranged on pump cover 2, and two inlet and outlet oil channels 17 are matched with two hydraulic chambers respectively. The sealing ring 11 is arranged between the pump body 1 and the sealed outer casing 3. The stator rotor assembly is composed of the motor stator 7 and the motor rotor 8 in the prior art, and the one way valve 5 is the one way valve in the prior art. Under the action of the one way valve 5, the liquid in the two hydraulic chambers cannot flow into the sealed outer casing 3 through the one way valve 5. The sealed outer casing 3 is a completely sealed casing, and the liquid entering the sealed outer casing 3 cannot leak. The pump body 1, the pump cover 2 and the sealed outer casing 3 are directly fixedly connected, so that the structure is more compact. The pump body 1 is provided with a pump cavity, and the gear assembly is arranged in the pump cavity. Since the motor shaft 4 drives the gear assembly to work, the motor shaft 4 is gap-fitted with the pump body 1. The liquid enters one hydraulic chamber through one inlet and outlet oil channel 17, and then enters another hydraulic chamber through the gear assembly under pressure. Then, the liquid is discharged from the other inlet and outlet oil channel 17. When the motor shaft 4 rotates in the reverse direction, the liquid conveying direction is opposite to that when the motor shaft 4 rotates in the forward direction. The gear assembly can be a bidirectional rotating internal meshing gear set in the prior art, or a bidirectional rotating external meshing gear set in the prior art. Part of the liquid pressurized by the gear assembly enters the sealed outer casing 3 through the gap between the motor shaft 4 and the pump body 1. When the liquid pressure in the sealed outer casing 3 is greater than the pressure in the smaller one of the two hydraulic chambers, the corresponding one way valve 5 in the hydraulic chamber opens, and the liquid in the sealed outer casing 3 enters the hydraulic chamber with smaller pressure. The two inlet and outlet oil channels 17 are respectively provided with one way valves 5. Under the cooperation of the two one way valves 5, whether the gear assembly rotates in the forward direction or the reverse direction, the function of freely switching the oil circuit can be realized, and the problem that the traditional oil pump can only rotate in one direction is solved.

[0024] In some embodiments, the stator rotor assembly includes a motor stator 7 and a motor rotor 8, the motor stator 7 is fixedly arranged on the inner wall of the sealed outer casing 3, and the motor rotor 8 is fixedly arranged on the motor shaft 4 and cooperates with the inner wall of the motor stator 7. The motor stator 7 is fixed on the sealed outer casing 3 and does not rotate, the motor rotor 8 is fixed on the motor shaft 4 and rotates with the motor shaft 4, and the motor shaft 4, the motor rotor 8 and the motor stator 7 are coaxially arranged.

[0025] In some embodiments, a mounting sleeve 9 is arranged on the bottom of the sealed outer shell 3, and a deep groove ball bearing 10 is arranged between the mounting sleeve 9 and the motor shaft 4. The mounting sleeve 9 is arranged to accommodate the deep groove ball bearing 10, and the deep groove ball bearing 10 bears the end of the motor shaft 4, so that the friction when the motor shaft 4 rotates is smaller.

[0026] In some embodiments, the gear assembly comprises a driving gear 12, a driven gear 13, a crescent plate 14, a crescent side plate 15 and a connecting block 16. The driven gear 13 is arranged to rotate in the pump body 1, the driving gear 12 is fixedly arranged on the motor shaft 4, the inner teeth of the driven gear 13 are engaged with the outer teeth of the driving gear 12, the crescent plate 14 is arranged between the driving gear 12 and the driven gear 13, two crescent side plates 15 are arranged on the outer wall of the crescent plate 14, the crescent plate 14 is connected to the pump cover 2 through the connecting block 16, and two hydraulic chambers are arranged at the two end sides of the crescent plate 14. The two crescent side plates 15 on the crescent plate 14 are arranged symmetrically. The motor shaft 4 drives the driving gear 12 to rotate, the driving gear 12 drives the driven gear 13 to rotate in the driven gear 13, and then under the action of the crescent plate 14 and the crescent side plate 15, the two end sides of the crescent plate 14 between the driving gear 12 and the driven gear 13 form hydraulic chambers, one hydraulic chamber is filled with oil, and the other hydraulic chamber is filled with high-pressure oil after being pressurized by the driving gear 12 and the driven gear 13. When the driving gear 12 drives the driven gear 13 to rotate in the opposite direction, the high-pressure hydraulic chamber becomes a low-pressure hydraulic chamber, and the low-pressure hydraulic chamber becomes a high-pressure hydraulic chamber to discharge oil.

[0027] In some embodiments, a through cable hole 18 is arranged on the bottom of the sealed outer shell 3, and a power cable is sealingly arranged in the cable hole 18. The motor stator 7 is wound with a coil, the coil needs to be powered with an external power supply, the cable hole 18 is used to install the power cable, and the cable hole 18 is sealingly connected with the power cable to ensure that the sealed outer shell 3 is completely sealed.

[0028] In the description of the present application, it should be understood that the terms "upper", "lower", "bottom", "one end", "top", "middle", "the other end", "coaxial", "one side", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In the utility model, unless another definite provision and limitation, the term "arrange", "install", "connect", "fix", "hinge" and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two element internal communication or two element's mutual action relation, unless another definite limitation, for the ordinary skill in the art, can understand the above-mentioned term in the utility model specific meaning according to specific circumstances.

[0030] The above only is the preferred embodiment of the utility model, should understand the utility model is not limited to the form disclosed in this paper, should not be regarded as the exclusion of other embodiments, and can be used in various other combinations, modifications and environment, and can be within the scope of the concept described herein, by the above teaching or related art technical or knowledge is changed.And the personnel of the change and variation of the field do not deviate from the spirit and scope of the utility model, then all should be within the scope of protection of the claims attached to the utility model.

Claims

1. A bidirectional motor pump with cooling function, characterized in that: The invention comprises a pump body (1), a pump cover (2), a sealed outer shell (3), a motor shaft (4), a one-way valve (5), a gear assembly and a stator-rotor assembly, wherein one end of the pump body (1) is sealed and fixedly connected to the pump cover (2), the other end of the pump body (1) is sealed and fixedly connected to the sealed outer shell (3), the fixed portion of the stator-rotor assembly is fixedly arranged on the inner wall of the sealed outer shell (3), the output portion of the stator-rotor assembly is fixedly arranged on the middle part of the motor shaft (4), one end of the motor shaft (4) is rotatably arranged on the bottom of the sealed outer shell (3), the other end of the motor shaft (4) passes through the pump body (1) and is fixedly connected to the gear assembly, the gear assembly is arranged in the pump body (1), two hydraulic chambers are arranged in the gear assembly, the two hydraulic chambers are respectively communicated with the interior of the sealed outer shell (3) through two flow passages (6), and the one-way valve (5) flowing toward the hydraulic chamber side is sealed in the flow passage (6).

2. A bidirectional motor pump with cooling function according to claim 1, characterized in that: The stator-rotor assembly comprises a motor stator (7) and a motor rotor (8); the motor stator (7) is fixedly arranged on the inner wall of the sealed outer shell (3); and the motor rotor (8) is fixedly arranged on the motor shaft (4) and cooperates with the inner wall of the motor stator (7).

3. A bidirectional motor pump with cooling function according to claim 1 or 2, characterized in that: A mounting sleeve (9) is provided on the bottom of the sealed outer shell (3), and a deep groove ball bearing (10) is provided between the motor shaft (4) and the mounting sleeve (9).

4. A bidirectional motor pump with cooling function according to claim 1 or 2, characterized in that: A sealing ring (11) is provided between the pump body (1) and the sealed outer shell (3).

5. A bidirectional motor pump with cooling function according to claim 1 or 2, characterized in that: The gear assembly comprises a driving gear (12), a driven gear (13), a crescent plate (14), a crescent side plate (15) and a connecting block (16); the driven gear (13) is rotatably arranged in the pump body (1); the driving gear (12) is fixedly arranged on the motor shaft (4); the inner teeth of the driven gear (13) are meshed with the outer teeth of the driving gear (12); the crescent plate (14) is arranged between the driving gear (12) and the driven gear (13); two crescent side plates (15) are arranged on the outer wall of the crescent plate (14); the crescent plate (14) is connected to the pump cover (2) through the connecting block (16); and the two hydraulic chambers are arranged on both end sides of the crescent plate (14).

6. The bidirectional motor pump with cooling function according to claim 5, characterized in that: The two crescent side plates (15) on the crescent plate (14) are symmetrically arranged.

7. A bidirectional motor pump with cooling function according to claim 1 or 2, characterized in that: The pump cover (2) is provided with two oil inlet and outlet passages (17), and the two oil inlet and outlet passages (17) are respectively matched with the two hydraulic chambers.

8. A bidirectional motor pump with cooling function according to claim 1 or 2, characterized in that: A penetrating cable hole (18) is provided on the bottom of the sealed outer shell (3), and the energized cable is sealed and arranged in the cable hole (18).

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