Heat exchange structure applicable to motor pumps

Abstract

The present invention relates to a heat exchange structure applicable to a motor pump, including a motor pump housing, an outer housing, a motor heat exchange jacket, a fixed sleeve, a movable sleeve, a piston sleeve, a piston and a spring; in this device, a high-pressure fluid is led from the outlet of the liquid-cooled pump through a spiral channel formed by the motor housing and the cylinder body and enters the pressurizing chamber. The working medium gradually fills the pressurizing chamber and discharges the air in the pressurizing chamber through a pipeline, avoiding the air in the pressurizing chamber being brought into the system interior when the system medium circulates, which may cause the system function to decline and cavitation of the liquid-cooled pump. After the gas in the pressurizing chamber is exhausted, the working medium can enter the low-pressure chamber from the high-pressure chamber through a pipeline. During the flow process, the medium can efficiently carry away the heat generated during the operation of the motor, thus avoiding the reduction of its reliability due to the motor being at a high temperature for a long time. At the same time, the high-pressure liquid in the pressurizing chamber and the elastic force of the spring are used to pressurize the piston simultaneously, ensuring the pressure at the inlet of the liquid-cooled pump and avoiding cavitation of the liquid-cooled pump.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft liquid cooling systems, and specifically discloses a heat exchange structure applicable to motor pumps. More particularly, the present invention can also implement a temperature adaptive structure. Background Art

[0002] In recent years, with the sharp increase in the heat load of aircraft electronic equipment, liquid cooling systems have been increasingly used because the liquid medium has a higher heat transfer coefficient and specific heat than air, and has higher cooling efficiency and stability. The liquid supply assembly, as the core component of the liquid cooling system, has been widely used. The traditional liquid supply assembly structure mainly has the following deficiencies:

[0003] Insufficient exhaust capacity: The pressurizing chamber of the traditional liquid supply assembly structure has no exhaust structure. When the product works, the air in the pressurizing chamber will be brought into the system, reducing the performance of the product, causing cavitation in the liquid cooling pump, and reducing the life of the liquid cooling pump.

[0004] Insufficient motor heat dissipation capacity: When the power of the liquid cooling pump in the liquid supply assembly is relatively large, generally heat dissipation fins are added to the liquid cooling pump motor to enhance the heat dissipation effect by increasing the heat dissipation area, but this brings the disadvantages of increased weight and volume.

[0005] Large size: The liquid cooling pump structure of the traditional liquid supply assembly is generally arranged outside the expansion tank housing (or filter housing), resulting in a large volume and weight of the liquid supply assembly. Summary of the Invention

[0006] The technical problems solved by the present invention are: 1. Provide a pressurizing chamber exhaust structure to exhaust the air in the system completely, preventing cavitation and performance degradation of the liquid cooling pump;

[0007] 2. Provide a new layout method for the liquid cooling pump to reduce the volume and weight of the liquid supply assembly.

[0008] 3. Provide a motor heat dissipation structure that can quickly take away the heat power consumption of the motor, ensure that the motor is in a suitable temperature range, and improve the reliability of the liquid supply assembly.

[0009] 4. Provide a temperature adaptive structure to ensure the normal operation of the product within the full temperature envelope.

[0010] The technical solution of the present invention is:

[0011] Provide a heat exchange structure applicable to motor pumps, including a motor pump housing, an outer housing, a motor heat exchange jacket, a fixed sleeve, a movable sleeve, a piston sleeve, a piston, and a spring;

[0012] The outer housing, piston sleeve, fixed sleeve, and motor heat exchange jacket are arranged from outside to inside in sequence; one end of the outer housing, piston sleeve, fixed sleeve, and motor heat exchange jacket is fixed integrally with the motor pump housing.

[0013] The outer housing is located outside the piston sleeve, and an oil return cavity is formed between the outer housing and the piston sleeve. The oil return cavity communicates with the low-pressure cavity of the motor pump housing; the fixed sleeve is located outside the motor heat exchange jacket, and a heat dissipation oil return channel is formed between the fixed sleeve and the motor heat exchange jacket; the piston sleeve is located outside the fixed sleeve and the movable sleeve, and a piston cavity is formed between the piston sleeve and the fixed sleeve and the movable sleeve; the pump motor is inside the motor heat exchange jacket.

[0014] The piston is located in the piston cavity and divides the piston cavity into a gas cavity and a liquid cavity. The liquid cavity communicates with the oil return cavity, and the gas cavity communicates with the external gas environment.

[0015] The movable sleeve is a single-sided open cylindrical structure, which is sleeved on the outer wall of the fixed sleeve and is in sliding seal fit. The spring is arranged inside the movable sleeve and is elastically arranged between the motor heat exchange jacket and the movable sleeve; a spiral channel is opened on the wall of the motor heat exchange jacket, and one end of the spiral channel communicates with the high-pressure cavity of the motor pump housing, and the other end communicates into the movable sleeve. The heat dissipation oil return channel communicates the inside of the movable sleeve with the low-pressure cavity of the motor pump.

[0016] When the motor pump operates, a part of the liquid in the high-pressure cavity will flow into the movable sleeve through the spiral channel and then return to the low-pressure cavity through the heat dissipation oil return channel; when the temperature of the low-pressure cavity rises and the liquid expands, the piston will slide, and then push the movable sleeve to slide and compress the spring to achieve temperature self-adaptation.

[0017] Furthermore, there is a sealing ring between the movable sleeve and the fixed sleeve.

[0018] Furthermore, the piston has a sealing ring.

[0019] Furthermore, the movable sleeve and the piston are in plug-in and guiding fit.

[0020] Furthermore, the outer housing, piston sleeve, fixed sleeve, movable sleeve, piston, and motor heat exchange jacket are all coaxially arranged.

[0021] Furthermore, the spring is a helical spring or a disc spring.

[0022] Furthermore, the spiral channel of the motor heat exchange jacket is formed by fins.

[0023] Furthermore, the outer housing is composed of multiple mold shells.

[0024] The advantages of the present invention are as follows: 1. In this device, a high-pressure fluid is introduced from the outlet (high-pressure end) of the liquid cooling pump through a spiral channel formed by the motor housing and the cylinder body and enters the pressurizing chamber. The working medium gradually fills the pressurizing chamber and discharges the air in the pressurizing chamber through a pipeline, preventing the air in the pressurizing chamber from being brought into the system interior when the system medium circulates, which may cause the system function to decline and cavitation of the liquid cooling pump. After the gas in the pressurizing chamber is completely discharged, the working medium can enter the low-pressure chamber from the high-pressure chamber through a pipeline. During the flow process, the working medium can efficiently carry away the heat generated during the operation of the motor, thus preventing the motor from being at a high temperature for a long time and reducing its reliability. At the same time, by utilizing the high-pressure liquid in the pressurizing chamber and the elastic force of the spring, both of them pressurize the piston simultaneously to ensure the pressure at the inlet of the liquid cooling pump and avoid cavitation of the liquid cooling pump. The traditional pressurizing structure of the liquid supply component mainly uses a spring for pressurization. This device uses part of the pressure generated by the high-pressure liquid to pressurize the piston, which can reduce the requirement for the elastic force of the spring, thereby reducing the weight of the spring and the weight of the entire product.

[0025] 2. In this device, the liquid cooling pump motor is buried inside the expansion tank, making full use of the space inside the piston cavity and reducing the volume of the liquid supply component.

[0026] 3. When the liquid cooling system is in use, first, the liquid cooling system is filled with liquid in the ground environment, and the operating temperature range of the liquid cooling system is generally between -55°C and 70°C. Due to the thermal expansion and contraction of the working medium, when the ambient temperature is at a low temperature, the volume of the medium shrinks, which may cause cavities in the system, reducing the suction capacity of the liquid cooling pump and affecting the performance of the system; when the ambient temperature is at a high temperature, the volume of the medium expands, which may crack the system structure. To avoid the above phenomena, this device is provided with a piston structure. When the volume of the working medium in the system shrinks, under the combined action of the elastic force of the spring and the pressure of the high-pressure liquid, the small piston presses the large piston to move, and the liquid stored in the liquid storage cavity is supplemented into the volume of the system working medium after contraction, thereby ensuring the pressure at the inlet of the liquid cooling pump and enabling the liquid cooling pump to work normally; when the volume of the working medium in the system expands, the large piston presses the small piston to move to increase the volume of the system and avoid cracking of the system structure due to the expansion of the working medium volume. Through this structure, the system can operate within the full temperature envelope. The main purpose of decomposing the piston structure into a large piston and a small piston is to reduce the processing difficulty and installation stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of the present invention (when the liquid volume expands and the piston reaches the maximum position);

[0028] Figure 2 is a schematic structural diagram of the motor heat exchange jacket;

[0029] Figure 3 is a side view of the present invention;

[0030] Figure 4 is a schematic structural view of the present invention (the liquid volume expands and the piston does not reach the maximum position);

[0031] Figure 5 is a schematic structural view of the present invention (the liquid volume does not expand);

[0032] In the figure: motor pump housing 1, outer housing 2, motor heat exchange jacket 3, fixed sleeve 4, movable sleeve 5, piston sleeve 6, piston 7, spring 8, low-pressure chamber 9, high-pressure chamber 10, oil return chamber 11, gas chamber 12, liquid chamber 13, inside the movable sleeve 14, spiral channel 15, heat dissipation oil return channel 16. Detailed implementation manners

[0033] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, many specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by showing examples of the present invention. The present invention is in no way limited to any specific arrangements and methods set forth below, but covers any improvements, substitutions, and modifications of structures, methods, and devices without departing from the spirit of the present invention. In the drawings and the following description, well-known structures and technologies are not shown to avoid unnecessarily obscuring the present invention.

[0034] It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other, and the various embodiments may refer to and cite each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0035] Embodiment 1, see attached Figure 1 -5, to provide a heat exchange structure applicable to a motor pump, including a motor pump housing, an outer housing, a motor heat exchange jacket, a fixed sleeve, a movable sleeve, a piston sleeve, a piston, and a spring;

[0036] The outer housing, the piston sleeve, the fixed sleeve, and the motor heat exchange jacket are arranged from outside to inside in sequence; one end of the outer housing, the piston sleeve, the fixed sleeve, and the motor heat exchange jacket is fixed integrally with the motor pump housing;

[0037] The outer housing is located outside the piston sleeve, and an oil return cavity is formed between the outer housing and the piston sleeve. The oil return cavity communicates with the low-pressure cavity of the motor pump housing. The fixed sleeve is located outside the motor heat exchange jacket, and a heat dissipation oil return channel is formed between the fixed sleeve and the motor heat exchange jacket. The piston sleeve is located outside the fixed sleeve and the movable sleeve, and a piston cavity is formed between the piston sleeve and the fixed sleeve and the movable sleeve. The pump motor is inside the motor heat exchange jacket.

[0038] The piston is located in the piston cavity and divides the piston cavity into a gas cavity and a liquid cavity. The liquid cavity communicates with the oil return cavity, and the gas cavity communicates with the external gas environment.

[0039] The movable sleeve is a cylindrical structure with a single-sided opening and is slidably and sealingly fitted on the outer wall of the fixed sleeve. The spring is arranged inside the movable sleeve and is elastically arranged between the motor heat exchange jacket and the movable sleeve. A spiral channel is formed on the wall of the motor heat exchange jacket, and one end of the spiral channel communicates with the high-pressure cavity of the motor pump housing, and the other end communicates with the inside of the movable sleeve. The heat dissipation oil return channel communicates the inside of the movable sleeve with the low-pressure cavity of the motor pump.

[0040] When the motor pump operates, part of the liquid in the high-pressure cavity will flow into the movable sleeve through the spiral channel and then return to the low-pressure cavity through the heat dissipation oil return channel. When the temperature of the low-pressure cavity rises and the liquid expands, the piston will slide, thereby pushing the movable sleeve to slide and compress the spring to achieve temperature self-adaptation.

[0041] There is a sealing ring between the movable sleeve and the fixed sleeve.

[0042] The piston has a sealing ring.

[0043] The movable sleeve and the piston are in plug-in and guiding cooperation.

[0044] The outer housing, the piston sleeve, the fixed sleeve, the movable sleeve, the piston and the motor heat exchange jacket are all coaxially arranged.

[0045] The spring is a spiral spring or a disc spring.

[0046] The spiral channel of the motor heat exchange jacket is formed by fins.

[0047] The outer housing is composed of multiple shell molds.

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

Claims

1. A heat exchange structure applicable to a motor pump, characterized in that: Motor pump housing, outer housing, motor heat exchange jacket, fixed sleeve, movable sleeve, piston sleeve, piston and spring; The outer housing, piston sleeve, fixed sleeve, and motor heat exchange jacket are arranged from outside to inside in sequence; one end of the outer housing, piston sleeve, fixed sleeve, and motor heat exchange jacket is fixed integrally with the motor pump housing; The outer housing is located outside the piston sleeve, and an oil return cavity is formed between the outer housing and the piston sleeve, and the oil return cavity communicates with the low-pressure cavity of the motor pump housing; the fixed sleeve is located outside the motor heat exchange jacket, and a heat dissipation oil return channel is formed between the fixed sleeve and the motor heat exchange jacket; The piston sleeve is located outside the fixed sleeve and the movable sleeve, and a piston cavity is formed between the piston sleeve and the fixed sleeve and the movable sleeve; the pump motor is inside the motor heat exchange jacket; The piston is located in the piston cavity and divides the piston cavity into a gas cavity and a liquid cavity. The liquid cavity communicates with the oil return cavity, and the gas cavity communicates with the external gas environment; The movable sleeve is a cylindrical structure with a single-sided opening, sleeved on the outer wall of the fixed sleeve and sliding in a sealed fit. The spring is arranged inside the movable sleeve, and the spring is elastically arranged between the motor heat exchange jacket and the movable sleeve; a spiral channel is opened on the wall of the motor heat exchange jacket, and one end of the spiral channel communicates with the high-pressure cavity of the motor pump housing, and the other end communicates into the movable sleeve. The heat dissipation oil return channel communicates the inside of the movable sleeve with the low-pressure cavity of the motor pump; When the motor pump is running, a part of the liquid in the high-pressure cavity will flow into the movable sleeve through the spiral channel and then return to the low-pressure cavity through the heat dissipation oil return channel; When the temperature of the low-pressure cavity rises and the liquid expands, the piston will slide, thereby pushing the movable sleeve to slide and compress the spring to achieve temperature self-adaptation.

2. The heat exchange structure applicable to a motor pump according to claim 1, characterized in that : There is a sealing ring between the movable sleeve and the fixed sleeve.

3. The heat exchange structure applicable to a motor pump according to claim 1, characterized in that : The piston has a sealing ring.

4. The heat exchange structure applicable to an electric pump according to claim 1, characterized in that : The movable sleeve and the piston are in plug-in and guiding fit.

5. The heat exchange structure applicable to an electric pump according to claim 1, characterized in that : The outer housing, piston sleeve, fixed sleeve, movable sleeve, piston and motor heat exchange jacket are all coaxially arranged.

6. The heat exchange structure applicable to a motor pump according to claim 1, characterized in that : The spring is a spiral spring or a disc spring.

7. The heat exchange structure applicable to a motor pump according to claim 1, characterized in that : The spiral channel of the motor heat exchange jacket is formed by fins.

8. The heat exchange structure applicable to a motor pump according to claim 1, characterized in that : The outer housing is composed of multiple shell molds.

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