Spherical rotor pump and tooth cleaning device

Abstract

The utility model provides a spherical rotor pump and a tooth cleaning device. The spherical rotor pump comprises a pump shell, the pump shell comprises a first shell body and a second shell body connected with the first shell body, and the first shell body and the second shell body jointly define a containing cavity; the rotor assembly is located in the accommodating cavity; the sealing piece is located between the first shell and the second shell and surrounds the containing cavity; one of the first shell and the second shell is provided with a groove, the other one of the first shell and the second shell is provided with a protrusion, the protrusion extends into the groove, and the end face of the protrusion abuts against the sealing piece so that the sealing piece can be tightly pressed into the groove. In addition, the contact part of the first shell and the second shell is also provided with the groove and the bulge, and the bulge extends into the groove and presses the sealing element in the groove, so that the sealing element can be kept in a pressed state, the sealing effect of the sealing element can be improved, and the risk of liquid leakage is further reduced.

Description

Technical Field

[0001] The present application relates to the technical field of oral cleaning, and in particular to a spherical rotor pump and a teeth cleaning device. Background Art

[0002] A spherical rotor pump is a positive displacement water delivery device. The spherical rotor pump generally comprises a pump casing and a rotor assembly disposed in the pump casing. The function of pumping water can be achieved through the rotation of the rotor assembly.

[0003] The pump housing in the related art includes an upper housing and a lower housing, which are interlocked and fixed by bolts. The pump housing of this structure has a poor sealing effect, so that the spherical rotor pump has the risk of leakage. Utility Model Content

[0004] The present application provides a spherical rotor pump and a teeth cleaning device, aiming to reduce the risk of liquid leakage of the spherical rotor pump.

[0005] The specific technical solutions are as follows:

[0006] In a first aspect, the present application provides a spherical rotor pump, comprising: a pump casing, the pump casing comprising a first shell and a second shell connected to the first shell, the first shell and the second shell jointly defining an accommodating cavity; a rotor assembly, the rotor assembly being located in the accommodating cavity; and a seal, the seal being located between the first shell and the second shell and arranged around the accommodating cavity; wherein a groove is provided on one of the first shell and the second shell, a protrusion is provided on the other of the first shell and the second shell, the protrusion extends into the groove, and an end face of the protrusion abuts against the seal to press the seal into the groove.

[0007] The spherical rotor pump in the embodiment of the present application has a pump housing including a first shell and a second shell connected to each other, and a seal arranged around the accommodating cavity is arranged between the first shell and the second shell, thereby forming a seal between the first shell and the second shell, thereby reducing the risk of liquid leakage in the accommodating cavity. In addition, a groove and a protrusion are also arranged at the contact part of the first shell and the second shell, and the protrusion extends into the groove and presses the seal into the groove, so that the seal can be kept in a compressed state, thereby improving the sealing effect of the seal, thereby further reducing the risk of liquid leakage.

[0008] In some embodiments, the thickness of the protrusion gradually decreases in a direction away from the rotor assembly.

[0009] In some embodiments, the protrusion is an annular structure, and the cross-sectional shape of the protrusion is a trapezoid.

[0010] In some embodiments, the rotor assembly includes an active rotor and a driven rotor, wherein the active rotor, the driven rotor and the wall of the accommodating chamber jointly define a variable-capacity chamber, wherein the active rotor can drive the driven rotor to rotate, and when the active rotor drives the driven rotor to rotate, the volume of the variable-capacity chamber changes; the active rotor has a first axis, and the active rotor can rotate around the first axis relative to the pump casing; the driven rotor has a second axis, and the driven rotor can rotate around the second axis relative to the pump casing, and the first axis intersects with the second axis.

[0011] In some embodiments, an end surface of the protrusion is perpendicular to the second axis.

[0012] In some embodiments, an angle between the end surface of the protrusion and the second axis is greater than 90° and less than or equal to 135°.

[0013] In some embodiments, the groove includes a first part and a second part that are connected to each other, the second part is located on a side of the first part away from the protrusion, the width of the first part is greater than the width of the second part, the protrusion is located in the first part, and the seal is located at least in the second part.

[0014] In some embodiments, the first shell and the second shell both include a shell body portion and a docking portion, the shell body portion has an open end, and the docking portion is located on the outside of the shell body portion and is arranged around the open end; the docking portion of the first shell and the docking portion of the second shell are connected by fasteners; the groove and the protrusion are both arranged on the docking portion.

[0015] In some embodiments, the docking portion of the first shell and / or the docking portion of the second shell are provided with reinforcing ribs.

[0016] In some embodiments, the distance from the groove to the wall of the accommodating cavity is greater than or equal to 0.8 mm; and / or the distance from the groove to the outer surface of the docking portion is greater than or equal to 0.8 mm.

[0017] In some embodiments, the distance from the bottom of the groove to the surface of the docking portion along the thickness direction is greater than or equal to 0.8 mm; and / or the width of the protrusion is greater than or equal to 0.8 mm.

[0018] In some embodiments, the distance from the groove to the outer surface of the docking portion is greater than the distance from the groove to the wall surface of the accommodating cavity.

[0019] In some embodiments, the seal is an annular seal, and the cross-sectional shape of the seal is circular.

[0020] In some embodiments, the spherical rotor pump also includes a driving device, which includes a main body and an output shaft connected to the main body, the output shaft can drive the rotor assembly to rotate through a transmission shaft, and the second shell is connected to the main body; the pump housing also has an installation cavity, the installation cavity and the accommodating cavity are separated by a partition, the output shaft is located in the installation cavity, a part of the transmission shaft is located in the installation cavity, and another part of the transmission shaft extends into the accommodating cavity and is connected to the rotor assembly; the spherical rotor pump also includes a sealing ring, which is sleeved on the transmission shaft and abuts against the partition.

[0021] In a second aspect, the present application provides a teeth cleaning device, which includes the spherical rotor pump in any of the above embodiments.

[0022] In the tooth cleaning device in the embodiment of the present application, the pump housing of the spherical rotor pump includes a first shell and a second shell connected to each other, and a sealing member arranged around the accommodating cavity is arranged between the first shell and the second shell, thereby forming a seal between the first shell and the second shell, thereby reducing the risk of liquid leakage in the accommodating cavity. In addition, a groove and a protrusion are also arranged at the contact portion of the first shell and the second shell, and the protrusion extends into the groove and presses the sealing member into the groove, so that the sealing member can be kept in a compressed state, thereby improving the sealing effect of the sealing member, thereby further reducing the risk of liquid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of a spherical rotor pump provided in one embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of a spherical rotor pump provided in one embodiment of the present application from another perspective;

[0025] Figure 3 for Figure 2 Schematic cross-sectional view of section AA;

[0026] Figure 4 for Figure 3 A magnified schematic diagram of part B;

[0027] Figure 5 for Figure 3 A partial enlarged schematic diagram of the structure shown (the seal is hidden);

[0028] Figure 6 for Figure 5 A magnified schematic diagram of part C;

[0029] Figure 7 An exploded schematic diagram of a spherical rotor pump provided in one embodiment of the present application;

[0030] Figure 8 A schematic diagram of the structure of a first shell provided in an embodiment of the present application;

[0031] Fig. 9 A schematic diagram of the structure of a seal provided in one embodiment of the present application;

[0032] Fig.10 This is a schematic diagram of the structure of a teeth cleaning device provided in one embodiment of the present application.

[0033] Description of reference numerals:

[0034] 1000. Teeth cleaning device;

[0035] 100, spherical rotor pump; 200, body; 300, nozzle;

[0036] 1. Pump housing; 101. Accommodating cavity; 102. Mounting cavity; 103. Partition plate; 107. First housing; 108. Second housing; 121. Groove; 1211. First part; 1212. Second part; 122. Protrusion; 1221. End face; 131. Housing body; 132. Butt joint; 133. Reinforcement rib;

[0037] 2. Rotor assembly; 201. Active rotor; 202. Driven rotor; 203. Variable capacity chamber;

[0038] 3. Transmission shaft;

[0039] 4. Sealing ring;

[0040] 5. driving device; 501 output shaft; 502 main body;

[0041] 16. Seals. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] In the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0047] A spherical rotor pump is a positive displacement water delivery device. The spherical rotor pump generally comprises a pump casing and a rotor assembly disposed in the pump casing. The function of pumping water can be achieved through the rotation of the rotor assembly.

[0048] The pump housing in the related art includes an upper housing and a lower housing, which are interlocked and fixed by bolts. The pump housing of this structure has a poor sealing effect, so that the spherical rotor pump has the risk of leakage.

[0049] Based on this, an embodiment of the first aspect of the present application provides a spherical rotor pump, aiming to reduce the risk of liquid leakage in the spherical rotor pump.

[0050] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4As shown, the spherical rotor pump 100 provided in the embodiment of the first aspect of the present application includes a pump housing 1, a rotor assembly 2 and a seal 16. Specifically, the pump housing 1 includes a first housing 107 and a second housing 108 connected to the first housing 107, the first housing 107 and the second housing 108 jointly define a receiving chamber 101, the rotor assembly 2 is located in the receiving chamber 101, and the seal 16 is located between the first housing 107 and the second housing 108 and is arranged around the receiving chamber 101. Among them, a groove 121 is provided on one of the first housing 107 and the second housing 108, and a protrusion 122 is provided on the other of the first housing 107 and the second housing 108, the protrusion 122 extends into the groove 121, and the end surface 1221 of the protrusion 122 abuts against the seal 16 to press the seal 16 into the groove 121.

[0051] The pump housing 1 of the spherical rotor pump 100 in the embodiment of the present application includes a first housing 107 and a second housing 108 connected to each other, and a seal 16 arranged around the accommodating chamber 101 is arranged between the first housing 107 and the second housing 108, thereby forming a seal between the first housing 107 and the second housing 108, thereby reducing the risk of liquid leakage in the accommodating chamber 101. In addition, a groove 121 and a protrusion 122 are further arranged at the contact portion between the first housing 107 and the second housing 108, and the protrusion 122 extends into the groove 121 and presses the seal 16 into the groove 121, so that the seal 16 can be kept in a compressed state, thereby improving the sealing effect of the seal 16, thereby further reducing the risk of liquid leakage.

[0052] In some embodiments, Figure 5 and Figure 6 As shown, the thickness h of the protrusion 122 gradually decreases in a direction away from the rotor assembly 2 .

[0053] Taking the groove 121 provided on the first shell 107 and the protrusion 122 provided on the second shell 108 as an example, when the first shell 107 and the second shell 108 are assembled, the protrusion 122 on the second shell 108 squeezes the seal 16. Since the thickness h of the protrusion 122 gradually decreases in the direction away from the rotor assembly 2, the protrusion 122 squeezes the seal 16 and expands the seal 16 radially outward, so that the first shell 107 is subjected to the force from the seal 16. Under the action of the force, the first shell 107 is slightly deformed outward. In this way, after the first shell 107 and the second shell 108 are assembled, it is helpful to avoid the friction force of the rotor assembly 2 when the rotor assembly 2 rotates due to the squeezing between the first shell 107 and the rotor assembly 2.

[0054] Taking the groove 121 provided on the second housing 108 and the protrusion 122 provided on the first housing 107 as an example, when the first housing 107 and the second housing 108 are assembled, the protrusion 122 on the first housing 107 squeezes the seal 16. Since the thickness h of the protrusion 122 gradually decreases in the direction away from the rotor assembly 2, the protrusion 122 squeezes the seal 16 and expands the seal 16 radially outward, so that the second housing 108 is subjected to the force from the seal 16. Under the action of the force, the second housing 108 produces a slight outward deformation. In this way, after the first housing 107 and the second housing 108 are assembled, it is helpful to avoid the squeezing between the second housing 108 and the rotor assembly 2, which causes the friction force to increase when the rotor assembly 2 rotates.

[0055] In some embodiments, Figure 6 and Figure 7 As shown, the protrusion 122 is an annular structure, so that any position of the seal 16 can be squeezed by the protrusion 122. In addition, the cross-sectional shape of the protrusion 122 can be configured as a trapezoid, wherein the short bottom side of the trapezoid corresponds to the surface of the seal 16 away from the rotor assembly 2, and the long bottom side of the trapezoid corresponds to the surface of the seal 16 close to the rotor assembly 2. Thus, a shape in which the thickness h of the protrusion 122 gradually decreases along the direction away from the rotor assembly 2 can be configured.

[0056] In some embodiments, Figure 3 , Figure 5 and Figure 7 As shown, the rotor assembly 2 includes an active rotor 201 and a driven rotor 202. The active rotor 201, the driven rotor 202 and the wall of the accommodating chamber 101 together define a variable volume chamber 203. The active rotor 201 can drive the driven rotor 202 to rotate, and when the active rotor 201 drives the driven rotor 202 to rotate, the volume of the variable volume chamber 203 changes. The active rotor 201 has a first axis a, and the active rotor 201 can rotate around the first axis a relative to the pump housing 1; the driven rotor 202 has a second axis b, and the driven rotor 202 can rotate around the second axis b relative to the pump housing 1, and the first axis a intersects with the second axis b.

[0057] The first axis a of the active rotor 201 intersects with the second axis b of the driven rotor 202. When the active rotor 201 drives the driven rotor 202 to rotate, the active rotor 201 rotates continuously around the first axis a, and the driven rotor 202 rotates continuously around the second axis b. At the same time, the driven rotor 202 performs reciprocating swinging motion relative to the active rotor 201. In this process, the volume of the variable capacity cavity 203 defined by the active rotor 201, the driven rotor 202 and the wall of the accommodating cavity 101 can be changed.

[0058] Usually, the pump housing 1 is provided with a liquid inlet and a liquid outlet. As the rotor assembly 2 rotates, the same variable volume cavity 203 will alternately connect to the liquid inlet and the liquid outlet. Moreover, the volume of the variable volume cavity 203 when connected to the liquid inlet is greater than the volume when connected to the liquid outlet. Therefore, as the variable volume cavity 203 rotates from the position connected to the liquid inlet to the position connected to the liquid outlet, the pressure in the accommodating cavity 101 will rise, thereby driving the liquid to be pumped out from the liquid outlet.

[0059] In one embodiment, the end surface 1221 of the protrusion 122 is perpendicular to the second axis b. At this time, the thickness h of the protrusion 122 does not change along the direction away from the rotor assembly 2, that is, the protrusion 122 has a uniform thickness h. In this case, after the first shell 107 and the second shell 108 are assembled, it can at least ensure that the shell where the groove 121 is located will not be slightly deformed outward or inward, thereby avoiding the shell where the groove 121 is located being squeezed with the rotor assembly 2 after assembly.

[0060] In another embodiment, Figure 5 As shown, the angle β between the end face 1221 of the protrusion 122 and the second axis b is greater than 90° and less than or equal to 135°. The angle β between the end face 1221 of the protrusion 122 and the second axis b is greater than 90°. At this time, the thickness h of the protrusion 122 gradually decreases in the direction away from the rotor assembly 2. In this case, when the first shell 107 and the second shell 108 are assembled, the shell where the groove 121 is located will produce a slight deformation outward. In this way, after the first shell 107 and the second shell 108 are assembled, it is helpful to avoid the extrusion between the shell where the groove 121 is located and the rotor assembly 2, which causes the friction force to increase when the rotor assembly 2 rotates.

[0061] In some embodiments, Figure 4 As shown, the groove 121 includes a first portion 1211 and a second portion 1212 which are connected to each other, the second portion 1212 is located on a side of the first portion 1211 away from the protrusion 122, wherein the width of the first portion 1211 is greater than the width of the second portion 1212, the protrusion 122 is located in the first portion 1211, and the sealing member 16 is located at least in the second portion 1212. In this way, during the assembly of the first shell 107 and the second shell 108, the sealing member 16 enters the second portion 1212 with a smaller width from the first portion 1211 with a larger width under the squeezing action of the protrusion 122, and the portion of the sealing member 16 located in the second portion 1212 is always kept in a compressed state, thereby further improving the sealing effect of the sealing member 16, thereby further reducing the risk of liquid leakage.

[0062] In some embodiments, Figure 5 and Figure 8As shown, the first shell 107 and the second shell 108 both include a shell body 131 and a docking portion 132, the shell body 131 has an open end, and the docking portion 132 is located outside the shell body 131 and is arranged around the open end. The docking portion 132 of the first shell 107 and the docking portion 132 of the second shell 108 are connected by fasteners, and the groove 121 and the protrusion 122 are both arranged at the docking portion 132. By arranging the docking portion 132 around the shell body 131 and connecting the docking portion 132 of the first shell 107 and the second shell 108 by fasteners, the contact area between the first shell 107 and the second shell 108 can be increased, thereby improving the sealing performance of the pump shell 1 and the connection stability between the first shell 107 and the second shell 108.

[0063] In some embodiments, Figure 8 As shown, the docking portion 132 of the first shell 107 and / or the docking portion 132 of the second shell 108 is provided with a reinforcing rib 133. During the operation of the spherical rotor pump 100, the first shell 107 and the second shell 108 will be subjected to the pressure of the liquid in the volume-changing chamber 203, and the pressure causes the first shell 107 and the second shell 108 to have a movement tendency away from each other. The pressure is relatively large, so that the connection portion of the first shell 107 and the second shell 108 is easily deformed. In this embodiment, the docking portion 132 of the first shell 107 and / or the second shell 108 is provided with a reinforcing rib 133. By providing the reinforcing rib 133, the structural strength and structural rigidity of the docking portion 132 can be improved, so that the docking portion 132 is not easily deformed, which is conducive to improving the connection stability between the first shell 107 and the second shell 108.

[0064] In some embodiments, Figure 5 As shown, the distance L1 from the groove 121 to the wall of the accommodating cavity 101 is greater than or equal to 0.8 mm, which is conducive to making the structure between the groove 121 and the accommodating cavity 101 have better structural strength and structural rigidity and is not prone to damage or deformation.

[0065] In some embodiments, Figure 6 As shown, the distance L2 from the groove 121 to the outer surface of the docking portion 132 is greater than or equal to 0.8 mm, which is conducive to making the structure between the groove 121 and the outer surface of the docking portion 132 have better structural strength and structural rigidity and is not prone to damage or deformation.

[0066] In some embodiments, Figure 6As shown, the distance L3 from the bottom of the groove 121 to the surface of the docking part 132 along the thickness direction is greater than or equal to 0.8 mm. This is conducive to making the structure between the bottom of the groove 121 and the surface of the docking part 132 along the thickness direction have better structural strength and structural rigidity, and is not easy to be damaged or deformed.

[0067] In some embodiments, Figure 6 As shown, the width w of the protrusion 122 is greater than or equal to 0.8 mm, which is conducive to making the protrusion 122 have better structural strength and structural rigidity and is not easy to be damaged or deformed.

[0068] In some embodiments, the distance L2 from the groove 121 to the outer surface of the docking portion 132 is greater than the distance L1 from the groove 121 to the wall of the accommodating chamber 101. In this way, the groove 121 is arranged at a position farther from the outer surface of the docking portion 132, but closer to the accommodating chamber 101. Since the seal 16 is arranged in the groove 121, it is possible to prevent more liquid from entering the gap between the two docking portions 132. In addition, when the groove 121 is arranged closer to the accommodating chamber 101, it is beneficial to shorten the arm of the torque formed by the pressure of the liquid in the variable cavity 203, thereby being more conducive to improving the connection stability between the first shell 107 and the second shell 108.

[0069] In some embodiments, Fig. 9 As shown, the seal 16 is an annular seal 16, so that the seal 16 can be arranged around the accommodating cavity 101, thereby forming a closed sealing structure between the first shell 107 and the second shell 108. In addition, the cross-sectional shape of the seal 16 is circular, so that the seal 16 has a relatively obvious deformation under the extrusion of the protrusion 122, so that the space in the groove 121 can be relatively fully filled and closely contacted with the wall surface of the groove 121, so as to obtain a better sealing performance.

[0070] In some embodiments, Figure 3 As shown, the spherical rotor pump 100 also includes a driving device 5, which includes a main body 502 and an output shaft 501 connected to the main body 502, and the output shaft 501 can drive the rotor assembly 2 to rotate through the transmission shaft 3, and the second housing 108 is connected to the main body 502. The pump housing 1 also has an installation cavity 102, and the installation cavity 102 and the accommodating cavity 101 are separated by a partition 103. The output shaft 501 is located in the installation cavity 102, a part of the transmission shaft 3 is located in the installation cavity 102, and another part of the transmission shaft 3 extends into the accommodating cavity 101 and is connected to the rotor assembly 2. The spherical rotor pump 100 also includes a sealing ring 4, which is sleeved on the transmission shaft 3 and abuts against the partition 103.

[0071] In this embodiment, the second housing 108 is connected to the main body 502 of the driving device 5, thereby the driving device 5 and the pump housing 1 can be assembled as one, thereby improving the connection stability between the driving device 5, the transmission shaft 3 and the rotating shaft assembly. In addition, the pump housing 1 also has a mounting cavity 102, the output shaft 501 of the driving device 5 is located in the mounting cavity 102, and a part of the transmission shaft 3 is also located in the mounting cavity 102, so that the mounting cavity 102 can be used to protect the output shaft 501 and the transmission shaft 3, and prevent external debris from touching the output shaft 501 and / or the transmission shaft 3 and affecting the transmission performance. Furthermore, the mounting cavity 102 and the accommodating cavity 101 are separated by a partition 103, and a sealing ring 4 is sleeved on the transmission shaft 3 to abut against the partition 103, thereby improving the sealing performance of the accommodating cavity 101, thereby preventing the liquid in the accommodating cavity 101 from overflowing into the mounting cavity 102.

[0072] The second aspect of the present application provides a tooth cleaning device 1000, which includes the spherical rotor pump 100 in any of the above embodiments. Fig.10 As shown, the tooth cleaning device 1000 may include a body 200 , a nozzle 300 disposed on the body 200 , and a spherical rotor pump 100 for delivering liquid to the nozzle 300 .

[0073] In the tooth cleaning device 1000 in the embodiment of the present application, the pump housing 1 of the spherical rotor pump 100 includes a first shell 107 and a second shell 108 connected to each other, and a seal 16 arranged around the accommodating chamber 101 is arranged between the first shell 107 and the second shell 108, thereby forming a seal between the first shell 107 and the second shell 108, thereby reducing the risk of liquid leakage in the accommodating chamber 101. In addition, a groove 121 and a protrusion 122 are also provided at the contact portion between the first shell 107 and the second shell 108, and the protrusion 122 extends into the groove 121 and presses the seal 16 into the groove 121, so that the seal 16 can be kept in a compressed state, thereby improving the sealing effect of the seal 16, thereby further reducing the risk of liquid leakage.

[0074] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A spherical rotor pump, characterized in that: include: A pump housing, the pump housing comprising a first housing and a second housing connected to the first housing, the first housing and the second housing jointly defining a containing cavity; A rotor assembly, wherein the rotor assembly is located in the accommodating cavity; as well as A sealing member, the sealing member is located between the first shell and the second shell and is arranged around the accommodating cavity; A groove is provided on one of the first shell and the second shell, and a protrusion is provided on the other of the first shell and the second shell. The protrusion extends into the groove, and an end surface of the protrusion abuts against the sealing member to press the sealing member into the groove.

2. The spherical rotor pump according to claim 1, characterized in that: The thickness of the protrusion gradually decreases in a direction away from the rotor assembly.

3. The spherical rotor pump according to claim 2, characterized in that: The protrusion is an annular structure, and the cross-sectional shape of the protrusion is a trapezoid.

4. The spherical rotor pump according to claim 1, characterized in that: The rotor assembly includes a driving rotor and a driven rotor, wherein the driving rotor, the driven rotor and the wall of the accommodating cavity together define a variable capacity cavity, and the driving rotor can drive the driven rotor to rotate, and when the driving rotor drives the driven rotor to rotate, the volume of the variable capacity cavity changes; The driving rotor has a first axis, and the driving rotor can rotate relative to the pump housing around the first axis; the driven rotor has a second axis, and the driven rotor can rotate relative to the pump housing around the second axis, and the first axis intersects the second axis.

5. The spherical rotor pump according to claim 4, characterized in that: An end surface of the protrusion is perpendicular to the second axis.

6. The spherical rotor pump according to claim 4, characterized in that: An included angle between the end surface of the protrusion and the second axis is greater than 90° and less than or equal to 135°.

7. The spherical rotor pump according to claim 1, characterized in that: The groove includes a first part and a second part connected to each other, the second part is located on a side of the first part away from the protrusion, the width of the first part is greater than the width of the second part, the protrusion is located in the first part, and the seal is at least located in the second part.

8. The spherical rotor pump according to claim 1, characterized in that: The first shell and the second shell each include a shell body and a docking portion, the shell body having an open end, and the docking portion is located outside the shell body and is arranged around the open end; The docking portion of the first shell and the docking portion of the second shell are connected by a fastener; The groove and the protrusion are both arranged on the butting portion.

9. The spherical rotor pump according to claim 8, characterized in that: The docking portion of the first shell and / or the docking portion of the second shell is provided with reinforcing ribs.

10. The spherical rotor pump according to claim 8, characterized in that: The distance from the groove to the wall of the accommodating cavity is greater than or equal to 0.8 mm; And / or, the distance from the groove to the outer surface of the docking portion is greater than or equal to 0.8 mm.

11. The spherical rotor pump according to claim 8, characterized in that: The distance from the bottom of the groove to the surface of the butt joint along the thickness direction is greater than or equal to 0.8 mm; And / or, the width of the protrusion is greater than or equal to 0.8 mm.

12. The spherical rotor pump according to claim 8, characterized in that: The distance from the groove to the outer surface of the docking portion is greater than the distance from the groove to the wall surface of the accommodating cavity.

13. The spherical rotor pump according to claim 1, characterized in that: The sealing member is an annular sealing member, and the cross-sectional shape of the sealing member is circular.

14. The spherical rotor pump according to claim 1, characterized in that The spherical rotor pump further includes a driving device, the driving device includes a main body and an output shaft connected to the main body, the output shaft can drive the rotor assembly to rotate through a transmission shaft, and the second housing is connected to the main body; The pump housing further comprises a mounting cavity, wherein the mounting cavity and the accommodating cavity are separated by a partition, the output shaft is located in the mounting cavity, a portion of the transmission shaft is located in the mounting cavity, and another portion of the transmission shaft extends into the accommodating cavity and is connected to the rotor assembly; The spherical rotor pump further comprises a sealing ring, which is sleeved on the transmission shaft and abuts against the partition plate.

15. A teeth cleaning device, characterized in that: A spherical rotor pump comprising the spherical rotor pump according to any one of claims 1 to 14.

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