Dry-type motor structure capable of preventing temperature rise

Abstract

The utility model discloses a dry-type motor structure capable of preventing temperature rise, and particularly relates to the technical field of motors, which comprises a motor shell, an outer cooling sleeve wrapped outside the motor shell in a sealed manner, an inner cooling sleeve arranged inside the outer cooling sleeve and sleeved outside the motor shell, and an inner cooling chamber formed between the inner cooling sleeve and the outer wall of the motor shell, an outer cooling chamber is formed between the outer cooling sleeve and the inner cooling sleeve, and the top of the inner cooling chamber communicates with the top of the outer cooling chamber. The internal cooling chamber and the external cooling chamber are communicated, and the axial flow impeller is utilized, so that the structure is completely built-in, any external cooling liquid and cooling device are not needed, and the cooling liquid is provided once and is permanently used; circulating power is built in the self structure, external energy power is not needed, no space is occupied, no external connecting pipeline exists, and the risks of intersection with other cables or pipelines and winding do not exist.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and more specifically, to a dry-type motor structure capable of preventing temperature rise. Background Art

[0002] Dry-type motors have serious temperature rise problems during use. The two existing solutions to the temperature rise problem of dry-type motors are as follows:

[0003] Solution 1: Install a motor cooling jacket, connect the coolant externally, and need an external device to drive the coolant to circulate in the cooling jacket, or connect tap water to the cooling jacket (relying on the pressure of the municipal tap water to flow in the cooling jacket), see Figure 2 structure:

[0004] Disadvantages: Coolant must be provided on site and an external device must be added to drive the coolant circulation, or tap water must be connected externally.

[0005] ① Providing coolant and adding external devices to drive the coolant circulation will increase direct economic costs and increase operating space;

[0006] Reasons for the disadvantages: adding devices will increase costs, and the added devices will inevitably require space to be stored.

[0007] ② External tap water. The site often does not have running water. Even if running water is available, it will increase the water cost.

[0008] Reasons for the shortcomings: The production and transportation of tap water requires costs, and using tap water will increase costs.

[0009] ③ External cooling devices or external tap water must use pipes to transport coolant or tap water. These connecting pipes intersect with other pipelines or power lines in the operating space, increasing safety hazards.

[0010] Solution 2: Connect a water pipe from the pump outlet to lead the water pumped by the pump into the cooling jacket, and then open another connection port on the cooling jacket to lead the water to the pump inlet with a pipe, so that the water circulates in the cooling jacket to cool the motor. See Figure 2. Figure 3 structure:

[0011] Disadvantages:

[0012] ① For external cooling devices, the medium (water) for pump operation must be transported through pipes. These connecting pipes intersect with other pipelines or power lines in the operating space, increasing safety hazards.

[0013] The reason for the shortcomings of this problem is that adding pipes means physical existence, and existing materials must occupy space and intersect with other power lines, because on-site operation must provide power for power equipment, and where there is power, there are wires.

[0014] ② In actual operation, the medium (water) pumped by the pump often contains solid particles or fibrous tissue and mixtures. These mixtures are transported to the motor cooling water jacket through the pump outlet and the connecting pipe. They are easy to block the delivery pipeline or deposit in the cooling water jacket, blocking the cooling water jacket. As the running time accumulates, the system cooling fails after blockage.

[0015] The reason for the blockage is that the pumped medium exists in nature. In many cases, domestic sewage or industrial sewage is collected and pumped. The sewage itself contains solid particles or fibrous tissue and mixtures. Utility Model Content

[0016] In order to solve the above technical problems, the utility model provides a dry-type motor structure for preventing temperature rise, comprising a motor housing, an outer cooling jacket with a sealing arrangement wrapped around the outside of the motor housing, an inner cooling jacket sleeved on the outside of the motor housing is arranged inside the outer cooling jacket, an inner cooling chamber is formed between the inner cooling jacket and the outer wall of the motor housing, an outer cooling chamber is formed between the outer cooling jacket and the inner cooling jacket, and the tops of the inner cooling chamber and the outer cooling chamber are connected to each other;

[0017] A high-pressure coolant chamber communicating with the inner cooling chamber and a low-pressure coolant chamber communicating with the outer cooling chamber are arranged at the bottom of the motor housing. The high-pressure coolant chamber is located above the low-pressure coolant chamber and the two are communicated.

[0018] In a preferred embodiment, a through hole for connecting the high-pressure coolant chamber and the low-pressure coolant chamber is provided in the middle of the two, and the bottom end of the motor shaft passes through the high-pressure coolant chamber, the through hole and the low-pressure coolant chamber and extends to the bottom of the motor housing.

[0019] In a preferred embodiment, an axial flow impeller fixed on the outer wall of the motor shaft is arranged in the through hole.

[0020] In a preferred embodiment, a high-pressure channel connected to the bottom of the inner cooling chamber is provided at the edge of the coolant high-pressure chamber, and a low-pressure channel connected to the bottom of the outer cooling chamber is provided at the edge of the coolant low-pressure chamber.

[0021] In a preferred embodiment, a coolant injection hole and a coolant discharge hole are respectively provided on the outer wall of the outer cooling jacket.

[0022] Technical effects and advantages of the utility model:

[0023] The utility model connects the inner and outer cooling chambers and utilizes an axial flow impeller to make the structure completely built-in, without the need for any external coolant and cooling device, and the coolant is provided once and used permanently; the circulating power is built into the structure itself, without the need for external energy power, without taking up space, without external connecting pipelines, and without intersection with other cables or pipelines, thereby posing a risk of entanglement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of a temperature rise solution for dry-type motors;

[0026] Figure 3 This is the structural diagram of the second solution for the temperature rise of dry motors.

[0027] Explanation of the reference numerals: 1 motor housing, 2 outer cooling jacket, 3 inner cooling jacket, 4 inner cooling chamber, 5 outer cooling chamber, 6 coolant high-pressure chamber, 7 coolant low-pressure chamber, 8 through hole, 9 axial flow impeller, 10 high-pressure channel, 11 low-pressure channel, 12 coolant injection hole, 13 coolant discharge hole. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

[0029] like Figure 1 A dry-type motor structure for preventing temperature rise is shown, comprising a motor housing 1, an outer cooling jacket 2 is wrapped with a sealing arrangement outside the motor housing 1, an inner cooling jacket 3 is arranged inside the outer cooling jacket 2 and sleeved on the outside of the motor housing 1, an inner cooling chamber 4 is formed between the inner cooling jacket 3 and the outer wall of the motor housing 1, an outer cooling chamber 5 is formed between the outer cooling jacket 2 and the inner cooling jacket 3, and the tops of the inner cooling chamber 4 and the outer cooling chamber 5 are connected to each other;

[0030] The height of the top end of the inner cooling sleeve 3 exceeds the height of the motor core, and covers the motor core, so that the heat generated by the main heat source of the motor can be absorbed by the inner cooling sleeve 3.

[0031] Furthermore, a coolant injection hole 12 and a coolant discharge hole 13 are respectively provided on the outer wall of the outer cooling jacket 2. Before use, coolant is injected into the outer cooling chamber 5 through the coolant injection hole 12. After the coolant level in the outer cooling chamber 5 is higher than the top of the inner cooling chamber 4, the coolant is immersed in the inner cooling chamber 4 until the overall coolant level is higher than the top of the inner cooling chamber 4, so that the coolant can circulate between the inner cooling chamber 4 and the outer cooling chamber 5.

[0032] A high-pressure coolant chamber 6 communicating with the inner cooling chamber 4 and a low-pressure coolant chamber 7 communicating with the outer cooling chamber 5 are provided at the bottom of the motor housing 1. The high-pressure coolant chamber 6 is located above the low-pressure coolant chamber 7 and the two are communicated with each other.

[0033] A through hole 8 for connecting the high-pressure coolant chamber 6 and the low-pressure coolant chamber 7 is provided in the middle thereof, and the bottom end of the motor shaft passes through the high-pressure coolant chamber 6, the through hole 8 and the low-pressure coolant chamber 7 and extends to the bottom of the motor housing 1;

[0034] Among them, dynamic seals are provided at the connection between the motor shaft and the coolant high-pressure chamber 6 and the coolant low-pressure chamber 7 to prevent the coolant inside the chamber from leaking from the joint between the chamber and the motor shaft during circulation.

[0035] An axial flow impeller 9 fixed on the outer wall of the motor shaft is arranged in the through hole 8;

[0036] A high-pressure passage 10 communicating with the bottom of the inner cooling chamber 4 is provided at the edge of the coolant high-pressure chamber 6 , and a low-pressure passage 11 communicating with the bottom of the outer cooling chamber 5 is provided at the edge of the coolant low-pressure chamber 7 .

[0037] On the basis of the above, the inner cooling chamber 4, the outer cooling chamber 5, the coolant high-pressure chamber 6 and the coolant low-pressure chamber 7 are interconnected to form a built-in independent coolant circulation system. According to the wing theory of fluid mechanics, the axial flow impeller 9 is designed. The axial flow impeller 9 is fastened to the motor shaft. When the motor is started, the motor shaft rotates, driving the axial flow impeller 9 to rotate. After the axial flow impeller 9 obtains kinetic energy, it converts the kinetic energy to the coolant, so that the coolant pressure in the coolant high-pressure chamber 6 increases. After the coolant pressure increases, it enters the inner cooling chamber 4 in the inner cooling jacket 3 along the high-pressure channel 10, and rises in the inner cooling chamber 4. The liquid level increases, fully contacts with the motor housing 1, and absorbs the heat of the motor housing 1. The amount of heat is then passed over the highest point of the inner cooling jacket 3 and enters the inner cooling chamber 4 between the outer cooling jacket 2 and the inner cooling jacket 3, transferring the heat to the outer cooling jacket 2, and dissipating it to the atmosphere through the air outside the outer cooling jacket 2. Then the coolant is cooled down and enters the coolant low-pressure chamber 7 along the low-pressure channel 11 at the bottom of the outer cooling chamber 5. The motor shaft rotates and the axial flow impeller 9 is used to circulate the cooled coolant from the through hole 8 to the coolant high-pressure chamber 6, and then the pressure is increased and repeatedly circulated to the inner cooling chamber 4, and the cycle is repeated.

[0038] On the basis of the above, by connecting the inner and outer cooling chambers 5 and utilizing the axial flow impeller 9, the structure is completely built-in, without the need for any external coolant or cooling device, and the coolant is provided once and used permanently; the circulating power is built into the structure itself, does not require external energy power, does not take up space, has no external connecting pipelines, does not intersect with other cables or pipelines, and has no risk of entanglement.

[0039] Furthermore, the coolant is the coolant commonly used for cooling machine tools in the prior art, does not contain solid particles or fibrous structures, and will not clog the cooling circulation pipeline.

[0040] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A dry motor structure for preventing temperature rise, characterized in that: The motor housing comprises an outer cooling jacket which is sealed and wrapped outside the motor housing, an inner cooling jacket which is sleeved outside the motor housing is arranged inside the outer cooling jacket, an inner cooling chamber is formed between the inner cooling jacket and the outer wall of the motor housing, an outer cooling chamber is formed between the outer cooling jacket and the inner cooling jacket, and the tops of the inner cooling chamber and the outer cooling chamber are connected to each other; A high-pressure coolant chamber communicating with the inner cooling chamber and a low-pressure coolant chamber communicating with the outer cooling chamber are arranged at the bottom of the motor housing. The high-pressure coolant chamber is located above the low-pressure coolant chamber and the two are communicated.

2. A dry-type motor structure for preventing temperature rise according to claim 1, characterized in that: A through hole for connecting the high-pressure coolant chamber and the low-pressure coolant chamber is provided in the middle thereof, and the bottom end of the motor shaft passes through the high-pressure coolant chamber, the through hole and the low-pressure coolant chamber and extends to the bottom of the motor housing.

3. A dry-type motor structure for preventing temperature rise according to claim 2, characterized in that: An axial flow impeller fixed on the outer wall of the motor shaft is arranged in the through hole.

4. The dry-type motor structure for preventing temperature rise according to claim 1, characterized in that: A high-pressure channel connected to the bottom of the inner cooling chamber is arranged at the edge of the coolant high-pressure chamber, and a low-pressure channel connected to the bottom of the outer cooling chamber is arranged at the edge of the coolant low-pressure chamber.

5. The dry-type motor structure for preventing temperature rise according to claim 1, characterized in that: A coolant injection hole and a coolant discharge hole are respectively arranged on the outer wall of the outer cooling jacket.

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