Double-shielding type totally-closed refrigerant pump

Abstract

The invention relates to the technical field of refrigerant pumps, and discloses a double-shielding type totally-closed refrigerant pump, which comprises a pump body assembly, a pump body assembly, a pump body assembly and a pump body assembly, the pump body assembly comprises a pump shell, a pump front-end shell arranged on the pump shell, a pump inlet formed in the pump front-end shell and a pump outlet formed in the pump shell; the working assembly comprises a closed motor part arranged in the pump shell, a pump impeller part connected with the closed motor part and a sealing piece arranged between the closed motor part and the pump impeller part; a cooling part is arranged on the closed motor part, a refrigerant conveying pipeline is connected with a pump inlet and a pump outlet, a pump inlet valve is opened, and a pump body is filled with a medium; the closed motor component is started, the output shaft of the motor drives the pump wheel to rotate synchronously, and a medium is sucked in under the negative pressure effect of the pump blades and flows to the liquid discharging component through the pipe opening after being pressurized.

Description

Technical Field

[0001] This invention relates to the technical field of refrigerant pumps, and more particularly to a double-shielded fully enclosed refrigerant pump. Background Technology

[0002] In the fields of data centers or communication equipment rooms, various types of refrigerant pumps are being used more and more. Existing fully enclosed pumps can only be used with insulating media because the motor also needs to come into contact with the fluid medium being transported. They cannot be used with conductive or corrosive media.

[0003] Existing canned motor pumps only isolate the motor, without providing a separate seal. Motor cooling relies on natural or air cooling, resulting in low reliability. Among various refrigerant pump types, the refrigerant pump is a particularly crucial component. Existing fully enclosed refrigerant pumps, due to structural design limitations, are only suitable for conveying insulating media. Conveying conductive media can easily lead to risks such as motor short circuits and corrosion, making it difficult to meet increasingly complex and diverse industrial demands. Therefore, we propose a double-shielded fully enclosed pump. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the current double-shielded fully enclosed refrigerant pump, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a double-shielded, fully enclosed refrigerant pump.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a double-shielded fully enclosed refrigerant pump, comprising: a pump body assembly, including a pump housing, a pump front end housing disposed on the pump housing, a pump inlet disposed on the pump front end housing, and a pump outlet disposed on the pump housing; a working assembly, including a closed motor component disposed within the pump housing, a pump impeller component connected to the closed motor component, and a seal disposed between the closed motor component and the pump impeller component; the closed motor component is provided with a cooling component.

[0008] As a preferred embodiment of the double-shielded fully enclosed refrigerant pump of the present invention, wherein: an inner support is provided inside the pump housing, the inner support is used to install the enclosed motor components, the pump housing and the pump front end housing are sealed together to form an inner cavity, and the pump inlet is connected to the pump front end housing.

[0009] As a preferred embodiment of the double-shielded fully enclosed refrigerant pump of the present invention, the enclosed motor component includes a motor housing mounted on an inner support, a pump motor stator mounted inside the motor housing, a pump motor rotor mounted inside the pump motor stator, and a motor output shaft connected to the pump motor rotor. One end of the motor housing is provided with a rear end cover, and the other end of the motor housing is provided with a front end cover. Bearings are provided between the motor output shaft and both the front end cover and the rear end cover. The motor output shaft is connected to the pump impeller component, and a liquid passage port is provided on the front end cover.

[0010] As a preferred embodiment of the double-shielded fully enclosed refrigerant pump of the present invention, the pump impeller component includes a pump body support connected to the pump inlet, a pump wheel disposed on the pump body support, and a pump blade disposed inside the pump wheel. A pump outer sleeve is disposed on the pump body support, and the pump outer sleeve covers the outside of the pump wheel. A liquid outlet is disposed on the pump outer sleeve, and the liquid outlet corresponds to the liquid through-hole.

[0011] As a preferred embodiment of the double-shielded fully enclosed refrigerant pump of the present invention, the cooling component includes an extension tube disposed on an inner support, a cooling tube disposed inside the extension tube, and a coolant injection port disposed at the end of the cooling tube.

[0012] As a preferred embodiment of the double-shielded fully enclosed refrigerant pump of the present invention, the pump impeller component includes a covering cylinder mounted on an inner support, a connecting cylinder connected to the covering cylinder, and a drive pump wheel mounted inside the connecting cylinder. A turbine is mounted inside the covering cylinder and is rotatably connected to the covering cylinder. A first bearing is mounted at the center of the turbine. A drive connecting shaft connected to the drive pump wheel is mounted on the enclosed motor component. A drain component is mounted inside the connecting cylinder.

[0013] As a preferred embodiment of the double-shielded fully enclosed refrigerant pump of the present invention, wherein: an intermediate wheel is provided at the position between the turbine and the drive pump wheel on the drive connecting shaft, actuating teeth are provided on the inner wall of the intermediate wheel, a second bearing is provided on the drive connecting shaft, and a one-way ring tooth is provided on the second bearing, the actuating teeth meshing with the one-way ring tooth.

[0014] As a preferred embodiment of the double-shielded fully enclosed refrigerant pump of the present invention, wherein: a plurality of deflecting blades are arrayed on the outer wall of the intermediate impeller, the deflecting blades include straight blade portions and inclined blade portions, an intermediate retaining ring is provided on the outer side of the intermediate impeller, and side retaining rings are provided on the turbine and the drive pump impeller, and the two side retaining rings abut against the end sidewall of the intermediate retaining ring.

[0015] As a preferred embodiment of the double-shielded fully enclosed refrigerant pump of the present invention, the discharge component includes an arc disk disposed at the center of the turbine, a plurality of discharge ports disposed on the arc disk, an electric switch plate slidably connected to the lower end of the arc disk, and a distribution pipe disposed on the covering cylinder, wherein the distribution pipe is connected to the discharge ports.

[0016] In a preferred embodiment of the double-shielded fully enclosed refrigerant pump of the present invention, a motor is provided on the electric switch plate.

[0017] The beneficial effects of this invention are as follows: the refrigerant delivery pipeline is connected to the pump inlet and pump outlet, the pump inlet valve is opened, and the medium fills the inside of the pump body; the closed motor component is started, the motor output shaft drives the pump wheel to rotate synchronously, the medium is drawn in under the negative pressure of the pump blade, and after being pressurized, it flows through the pipe to the discharge component. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0019] Figure 1 This is a schematic diagram of the overall structure of the double-shielded fully enclosed refrigerant pump of the present invention.

[0020] Figure 2 This is a cross-sectional schematic diagram of the internal structure of the double-shielded fully enclosed refrigerant pump of the present invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of the pump front housing of the double-shielded fully enclosed refrigerant pump of the present invention in an exploded state.

[0022] Figure 4 This is a schematic diagram of the pump impeller component in Embodiment 2 of the double-shielded fully enclosed refrigerant pump of the present invention.

[0023] Figure 5 This is an exploded schematic diagram of the pump impeller component in Embodiment 2 of the double-shielded fully enclosed refrigerant pump of the present invention.

[0024] Figure 6 This is a schematic diagram of the intermediate impeller structure of the double-shielded fully enclosed refrigerant pump of the present invention.

[0025] Figure 7 This is a cross-sectional schematic diagram of the pump impeller component in Embodiment 2 of the double-shielded fully enclosed refrigerant pump of the present invention.

[0026] Explanation of reference numerals in the attached drawings: 100, Pump body assembly; 1001, Pump housing; 101, Pump front end housing; 102, Pump inlet; 103, Pump outlet; 200, Working assembly; 201, Enclosed motor assembly; 202, Pump impeller assembly; 203, Seal; 204, Cooling assembly; 104, Inner support; 105, Liquid inlet; 2011, Motor housing; 2012, Pump motor stator; 2013, Pump motor rotor; 2014, Motor output shaft; 2015, Rear end cover; 2016, Front end cover; 2017, Bearing; 2021, Pump body support; 2022, Pump impeller; 2023. Pump impeller; 2024, pump outer casing; 2025, liquid outlet; 2041, extension pipe; 2042, cooling pipe; 2043, coolant inlet; 400, covering cylinder; 401, connecting cylinder; 402, drive pump wheel; 403, turbine; 404, first bearing; 405, drive connecting shaft; 406, intermediate wheel; 407, actuating gear; 408, second bearing; 409, one-way ring gear; 500, deflecting vane; 501, intermediate retaining ring; 502, side retaining ring; 503, drain component; 5031, arc plate; 5032, drain port; 5033, electric switch plate; 5034, distributor pipe. Detailed Implementation

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0030] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0031] Example 1

[0032] Reference Figures 1-3The first embodiment of the present invention provides a double-shielded fully enclosed refrigerant pump, including a pump body assembly 100 and a working assembly 200. The two work together to achieve safe refrigerant delivery, specifically solving the problems of traditional refrigerant pumps being unable to adapt to conductive / corrosive media, motors being prone to short-circuit corrosion, low cooling reliability, and high fluid delivery resistance.

[0033] Furthermore, the pump body assembly 100 serves as the basic support and fluid introduction unit for the pump, ensuring a closed environment and media delivery channel. In this embodiment, the pump body assembly 100 includes a pump housing 1001, a pump front end housing 101 disposed on the pump housing 1001, a pump inlet 102 disposed on the pump front end housing 101, and a pump outlet 103 disposed on the pump housing 1001.

[0034] The pump housing 1001 is detachably connected to the pump front housing 101. A sealing ring is provided between the pump housing 1001 and the pump front housing 101 to form a sealed inner cavity between the pump housing 1001 and the pump front housing 101, thereby preventing media leakage. The pump inlet 102 is provided on the pump front housing 101, and the pump outlet 103 is provided on the pump housing 1001.

[0035] Furthermore, the sealed connection between the pump housing 1001 and the pump front end housing 101 is made of fluororubber gaskets and fastened with bolts. The sealing pressure can withstand ≥1.6MPa, which can effectively isolate the conveyed medium from the external environment.

[0036] Furthermore, an inner support 104 is provided inside the pump housing 1001. The inner support 104 is made of corrosion-resistant stainless steel to prevent failure after contact with corrosive media. Compared with traditional carbon steel supports, it can extend the service life. The size of the pump housing 1001 is larger than the size of the pump front housing 101. The pump housing 1001 and the pump front housing 101 form a cylindrical structure after being combined.

[0037] Furthermore, the present invention also includes a working component 200, which is disposed within the internal space formed by the pump housing 1001 and the pump front end housing 101. In this embodiment, the working component 200 includes a closed motor component 201 disposed within the pump housing 1001, a pump impeller component 202 connected to the closed motor component 201, and a seal 203 disposed between the closed motor component 201 and the pump impeller component 202; a cooling component 204 is disposed on the closed motor component 201.

[0038] Preferably, the enclosed motor component 201 is the power core of the pump, achieving double shielding isolation between the motor and the conveying medium. In this embodiment, the enclosed motor component 201 includes a motor housing 2011 mounted on an inner support 104, a pump motor stator 2012 mounted inside the motor housing 2011, a pump motor rotor 2013 mounted inside the pump motor stator 2012, and a motor output shaft 2014 connected to the pump motor rotor 2013. A rear end cover 2015 is provided at one end of the motor housing 2011, and a front end cover 2016 is provided at the other end of the motor housing 2011. Bearings 2017 are provided between the motor output shaft 2014 and both the front end cover 2016 and the rear end cover 2015. The motor output shaft 2014 is connected to the pump impeller component 202. A liquid passage port 105 is provided on the front end cover 2016.

[0039] The motor housing 2011 is mounted on the inner bracket 104, and its two ends are sealed by the front cover 2016 and the rear cover 2015 to form an independent closed cavity, which completely encloses the pump motor stator 2012 and the pump motor rotor 2013; the motor output shaft 2014 passes through the front cover 2016 and the rear cover 2015, and rotates in cooperation with the bearing 2017. One end of the motor output shaft 2014 is connected to the pump impeller component 202.

[0040] Preferably, the motor housing 2011 and the pump housing 1001 form a double-shielded structure, with the enclosed motor component 201 completely independent of the conveying medium channel. Even if the pump housing 1001 leaks accidentally, the motor enclosure can still isolate the medium, preventing short circuits or corrosion of the motor. Compared with traditional single-shielded pumps, the reliability of medium isolation is improved, and conductive media can be safely conveyed. The bearing 2017 is made of corrosion-resistant ceramic material and is used with high-temperature grease, which is suitable for the low-temperature environment of refrigerant conveying. The rotational resistance is small, which improves the motor operating efficiency.

[0041] Furthermore, the pump impeller assembly 202 is a fluid conveying execution unit, realizing the intake and pressurized conveying of the medium. The pump impeller assembly 202 includes a pump body support 2021 connected to the pump inlet 102, a pump wheel 2022 disposed on the pump body support 2021, and pump blades 2023 disposed inside the pump wheel 2022. A pump outer sleeve 2024 is disposed on the pump body support 2021, covering the outside of the pump wheel 2022. A liquid outlet 2025 is disposed on the pump outer sleeve 2024, wherein the liquid outlet 2025 corresponds to the liquid through port 105. The pump body support 2021 is fixed to the outside of the front end cover 2016, the pump wheel 2022 is disposed on the pump body support 2021, the pump blades 2023 are evenly distributed inside the pump wheel 2022, the pump outer sleeve 2024 covers the pump wheel 2022, and the liquid outlet 2025 on it corresponds to the liquid through port 105 of the front end cover 2016.

[0042] The pump impeller 2022 is rigidly connected to the motor output shaft 2014. The motor drives the pump impeller 2022 to rotate at high speed. The pump blade 2023 generates negative pressure to draw the medium from the pump inlet 102. After being pressurized by centrifugal force, the medium is discharged from the liquid outlet 2025. Then, the liquid passes through the pipe 105 and is sent out from the pump outlet 103. The pump jacket 2024 is designed to prevent medium leakage and guide the flow direction of the medium, reducing the generation of eddies. The pump blade 2023 adopts a biomimetic curved surface design to adapt to the viscosity characteristics of the refrigerant, thus enabling stable operation under low liquid level conditions.

[0043] Furthermore, the cooling component 204 is a heat dissipation unit for the enclosed motor, solving the problem of low reliability of natural heat dissipation in traditional motors. In this embodiment, the cooling component 204 includes an extension tube 2041 disposed on the inner support 104, a cooling tube 2042 disposed inside the extension tube 2041, and a coolant injection port 2043 disposed at the end of the cooling tube 2042. The cooling tube 2042 spirals around the outside of the motor housing 2011, and the coolant injection port 2043 is connected to the external cooling system to form a circulating cooling circuit.

[0044] Furthermore, the coolant circulates through the cooling pipe 2042, directly carrying away the heat generated by the operation of the enclosed motor component 201. This high heat dissipation efficiency keeps the outer shell temperature of the enclosed motor component 201 below 60°C, preventing insulation aging caused by high temperatures. The cooling circuit is completely isolated from the medium transport channel, so even if the cooling pipe 2042 is damaged, it will not contaminate the transport medium, ensuring the cleanliness of the refrigeration system.

[0045] Operation process: Connect the refrigerant delivery pipeline to the pump inlet 102 and the pump outlet 103, open the pump inlet 102 valve to fill the pump body with medium; start the closed motor component 201, the motor output shaft 2014 drives the pump wheel 2022 to rotate, the medium is drawn in under the negative pressure of the pump blade 2023, and after being pressurized, it flows through the liquid outlet 105 to the drain component 503.

[0046] Example 2

[0047] Reference Figures 4-7 The difference between this embodiment and the previous embodiment is that the pump impeller component 202 includes a covering cylinder 400 disposed on the inner support 104, a connecting cylinder 401 connected to the covering cylinder 400, the covering cylinder 400 and the connecting cylinder 401 are fixedly connected, and a drive pump wheel 402 is disposed inside the connecting cylinder 401. The drive pump wheel 402 includes a pump wheel housing fixedly connected to the connecting cylinder 401, so that the rotation of the connecting cylinder 401 will synchronously drive the rotation of the pump wheel housing, and a plurality of paddles arranged in a circumferential array are disposed inside the pump wheel housing.

[0048] Furthermore, a turbine 403 is provided inside the covering cylinder 400. The structure of the turbine 403 is the same as that of the drive pump wheel 402, except that the blades of the turbine 403 have a certain angle of deflection, and the outer shell of the turbine 403 is not connected to the covering cylinder 400, so that the turbine 403 can rotate inside the covering cylinder 400. The turbine 403 and the drive pump wheel 402 are arranged opposite to each other, and the turbine 403 and the drive pump wheel 402 have the same size. A drive connecting shaft 405 connected to the drive pump wheel 402 is provided on the closed motor component 201. A first bearing 404 is provided at the center of the turbine 403. The first bearing 404 is sleeved on the drive connecting shaft 405, so that the rotation of the drive connecting shaft 405 will not drive the rotation of the turbine 403. A drain component 503 is provided inside the connecting cylinder 401.

[0049] An intermediate wheel 406 is connected to the drive connecting shaft 405 via a first bearing 404. The intermediate wheel 406 is located between the drive pump wheel 402 and the turbine 403. A toggle tooth 407 is provided on the inner wall of the intermediate wheel 406. A second bearing 408 is provided on the drive connecting shaft 405. A one-way ring tooth 409 is provided on the second bearing 408. The one-way ring tooth 409 includes a first inclined surface and a second inclined surface. The angle between the first inclined surface and the tangent direction of the outer wall of the second bearing 408 is greater than the angle between the second inclined surface and the tangent direction of the outer wall of the second bearing 408. The toggle tooth 407 meshes with the one-way ring tooth 409, so that the intermediate wheel 406 can only rotate in one direction.

[0050] Several deflecting blades 500 are arrayed on the outer wall of the intermediate wheel 406. The deflecting blades 500 include straight blade portions and inclined blade portions. When viewed from the positive direction of the deflecting blades 500, the inclined blade portions and the straight blade portions are connected by a smooth arc surface. In this embodiment, the inclined blade portions all face the same direction.

[0051] Preferably, the tilting direction of the tilted blades is opposite to the tilting direction of the blades of the turbine 403.

[0052] An intermediate retaining ring 501 is provided on the outer side of the intermediate wheel 406, and side retaining rings 502 are provided on the turbine 403 and the drive pump wheel 402. The two side retaining rings 502 abut against the end side wall of the intermediate retaining ring 501.

[0053] The pump wheel 2022 rotates and drives the pump wheel 402 to rotate synchronously through the drive connecting shaft 405. The intermediate wheel 406 rotates in turn under the meshing action of the actuating tooth 407 and the one-way ring tooth 409.

[0054] Furthermore, in this embodiment, the drain component 503 includes an arc disk 5031 disposed at the center of the turbine 403, a plurality of drain ports 5032 disposed on the arc disk 5031, an electric switch plate 5033 slidably connected to the lower end of the arc disk 5031, and a liquid distribution pipe 5034 disposed on the covering cylinder 400, the liquid distribution pipe 5034 being connected to the drain ports 5032.

[0055] Furthermore, a motor is installed on the electric switch board 5033, which is driven to open and close by the motor, and can precisely control the drainage flow rate.

[0056] Operation process: The enclosed motor component 201 drives the connecting cylinder 401 to rotate through the drive connecting shaft 405. The connecting cylinder 401 will synchronously drive the drive pump wheel 402 to rotate. When the drive pump wheel 402 rotates, the refrigerant will be dispersed outward due to centrifugal force, and then hit the turbine 403 from near the edge. Because the rotation of the drive pump wheel 402 increases the vortex of the refrigerant leaving the drive pump wheel 402, the refrigerant leaving the turbine 403 flows from the center position near the turbine 403 to the drive pump wheel 402.

[0057] As the drive pump wheel 402 rotates faster, the refrigerant flow rate increases, which in turn causes the turbine 403 to gradually increase in speed. The rotation direction of the turbine 403 is the same as that of the drive pump wheel 402. Initially, the turbine 403 rotates at a very low speed, causing the refrigerant to flow in a straight line towards the drive pump wheel 402. At this time, the refrigerant near the cylinder wall of the connecting cylinder 401 and the covering cylinder 400 rotates at a high speed, while the refrigerant in the center rotates at a lower speed. The rotation of the turbine 403 also causes the refrigerant to disperse outward. Because the turbine 403 rotates at a low speed initially, the refrigerant leaving the turbine 403 flows almost in a straight line. When the refrigerant moves to the intermediate wheel 40... At 6 o'clock, the intermediate wheel 406 will be driven to rotate in the opposite direction to the rotation of the turbine 403. However, due to the one-way ring tooth 409 inside the intermediate wheel 406, the intermediate wheel 406 will not rotate. At this time, the refrigerant will be deflected along the blades of the intermediate wheel 406 and will hit the blades of the drive pump wheel 402 again, further increasing the speed of the drive pump wheel 402 and generating greater torque. This also makes the refrigerant hit by the drive pump wheel 402 on the turbine 403 have a greater force, thereby continuously increasing the speed and torque of the turbine 403. This process will be repeated continuously, thereby adjusting the flow rate of the internal liquid and enabling the liquid to be pressurized and accelerated.

[0058] During the operation of the enclosed motor component 201, the cooling circuit continuously removes heat to maintain a stable temperature; the deflecting blades 500 of the intermediate impeller 406 guide the medium to flow smoothly, reduce eddies and resistance, and ensure that the medium delivery pressure and flow rate meet the system requirements; the unidirectional ring teeth 409 prevent the medium from flowing back and ensure the pump body operates efficiently in one direction.

[0059] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. Any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended protection.

[0060] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0061] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the protection scope of the present invention.

Claims

1. A double shielded totally enclosed refrigerant pump characterized by: The utility model relates to a pump, which comprises: a pump body assembly (100) comprising a pump shell (1001), a pump front end shell (101) arranged on the pump shell (1001), a pump inlet (102) arranged on the pump front end shell (101), and a pump outlet (103) arranged on the pump shell (1001), wherein an inner support (104) is arranged in the pump shell (1001); a working assembly (200) comprising a closed motor component (201) arranged in the pump shell (1001), a pump impeller component (202) connected to the closed motor component (201), and a seal (203) arranged between the closed motor component (201) and the pump impeller component (202); the pump impeller component (202) comprises a cladding cylinder (400) arranged on the inner support (104), a connecting cylinder (401) connected to the cladding cylinder (400), and a driving pump wheel (402) arranged in the connecting cylinder (401); the cladding cylinder (400) is provided with a turbine (403) arranged therein, the turbine (403) is rotationally connected to the cladding cylinder (400), a first bearing (404) is arranged at the center of the turbine (403), the closed motor component (201) is provided with a driving connecting shaft (405) connected to the driving pump wheel (402), an intermediate wheel (406) is arranged on the driving connecting shaft (405), the intermediate wheel (406) is arranged between the driving pump wheel (402) and the turbine (403), a driving tooth (407) is arranged on the inner wall of the intermediate wheel (406), a second bearing (408) is arranged on the driving connecting shaft (405), a one-way ring tooth (409) is arranged on the second bearing (408), the driving tooth (407) is engaged with the one-way ring tooth (409), and a liquid discharge component (503) is arranged in the connecting cylinder (401). The closed motor component (201) is provided with a cooling component (204).

2. The double shielded totally enclosed refrigerant pump of claim 1, wherein: The inner support (104) is used for mounting the closed motor component (201), the pump shell (1001) and the pump front end shell (101) are in airtight connection, thereby forming an inner cavity, and the pump inlet (102) is connected to the pump front end shell (101).

3. The double shielded totally enclosed refrigerant pump of claim 2, wherein: The closed motor component (201) comprises a motor shell (2011) arranged on the inner support (104), a pump motor stator (2012) arranged in the motor shell (2011), a pump motor rotor (2013) arranged in the pump motor stator (2012), and a motor output shaft (2014) connected to the pump motor rotor (2013); one end of the motor shell (2011) is provided with a rear end cover (2015), the other end of the motor shell (2011) is provided with a front end cover (2016), bearings (2017) are arranged between the motor output shaft (2014) and the front end cover (2016) and the rear end cover (2015), the motor output shaft (2014) is connected to the pump impeller component (202), and a liquid passing pipe (105) is formed in the front end cover (2016).

4. The double shielded totally enclosed refrigerant pump of claim 3, wherein: The pump impeller part (202) comprises a pump body support (2021) connected with the pump inlet (102), a pump wheel (2022) arranged on the pump body support (2021), and a pump blade (2023) arranged in the pump wheel (2022), wherein the pump body support (2021) is provided with a pump outer sleeve (2024), the pump outer sleeve (2024) is arranged outside the pump wheel (2022), the pump outer sleeve (2024) is provided with a liquid outlet (2025), and the liquid outlet (2025) corresponds to the liquid passing pipe (105).

5. The double shielded totally enclosed refrigerant pump of claim 1 wherein: The cooling part (204) comprises an extension pipe (2041) arranged on the inner support (104), a cooling pipe (2042) arranged in the extension pipe (2041), and a coolant injection inlet (2043) arranged on the end of the cooling pipe (2042).

6. The double shielded totally enclosed refrigerant pump of claim 1, wherein: The outer wall of the intermediate wheel (406) is arrayed with a plurality of deflection blades (500), the deflection blades (500) comprise a straight blade part and an inclined blade part, the outer side of the intermediate wheel (406) is provided with an intermediate blocking ring (501), the turbine (403) and the driving pump wheel (402) are provided with side blocking rings (502), and the two side blocking rings (502) abut against the end side wall of the intermediate blocking ring (501).

7. The double shielded totally-enclosed refrigerant pump of claim 1, wherein: The liquid discharge part (503) comprises a circular arc disc (5031) arranged at the center of the turbine (403), a plurality of liquid discharge ports (5032) arranged on the circular arc disc (5031), an electric switch plate (5033) slidably connected to the lower end of the circular arc disc (5031), and a liquid distribution pipe (5034) arranged on the covering cylinder (400), wherein the liquid distribution pipe (5034) is connected with the liquid discharge port (5032).

8. The double shielded totally-enclosed refrigerant pump of claim 7, wherein: The electric switch plate (5033) is provided with a motor.

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