A centrifugal pump pump shell, centrifugal pump pump head and centrifugal pump

Abstract

The utility model provides a kind of centrifugal pump pump shell, centrifugal pump pump head and centrifugal pump, this centrifugal pump pump shell includes first shell, second shell and third shell;First shell and third shell are respectively covered and arranged at the two ends of second shell, and form pump cavity by enclosing;The end face of first shell away from pump cavity forms first fluid passage, and first fluid passage is configured as one of pump inlet or pump outlet;The side of second shell forms second fluid passage, and second fluid passage is configured as the other of pump inlet or pump outlet;The centrifugal pump pump shell is designed into three-part shell, so, not only facilitate the processing of pump shell, meanwhile, different material can be configured for each part of shell, to adapt to different scene requirements, improve the adaptability of pump head and application range.

Description

Technical Field

[0001] This application relates to the field of centrifugal pump technology, and in particular to a centrifugal pump casing, a centrifugal pump head, and a centrifugal pump. Background Technology

[0002] Magnetic levitation pumps, with their advantages of no mechanical contact and no friction, have become core fluid transport equipment in industries such as semiconductors, chemicals, and pharmaceuticals. The design of their pump head structure must cope with extreme operating conditions in various scenarios: in the semiconductor field, the ultra-cleanliness requirements necessitate that the pump head material avoid metal ion contamination; the chemical industry requires explosion-proof certification. In existing technologies, due to the structure and material design of the pump casing, the pump head cannot be adapted to various application scenarios, thus limiting its application range. Utility Model Content

[0003] To address the aforementioned technical problems, this application provides a centrifugal pump casing, a centrifugal pump head, and a centrifugal pump.

[0004] A first aspect of this application provides a centrifugal pump casing, including a first casing, a second casing, and a third casing; the first casing and the third casing respectively cover both ends of the second casing and enclose it to form a pump cavity; a first sealing element is provided between the first casing and the second casing; a second sealing element is provided between the second casing and the third casing; a first fluid channel is formed on the first casing, the first fluid channel being configured as either a pump inlet or a pump outlet; a second fluid channel is formed on the side of the second casing, orthogonally distributed to the fluid direction of the first fluid channel, the second fluid channel being configured as either a pump inlet or a pump outlet.

[0005] In some embodiments of this application, the end face of the first housing that contacts the pump chamber forms a first inclined surface that surrounds the first fluid channel and is inclined circumferentially, and the first inclined surface is configured to gradually approach the third housing as it extends circumferentially from the first fluid channel.

[0006] In some embodiments of this application, a second inclined surface is also formed on the first housing, the second inclined surface being configured to gradually move away from the third housing as it extends circumferentially from the intersection with the first inclined surface.

[0007] In some embodiments of this application, the third housing is inserted into the second housing such that the second housing radially covers the third housing on its outer side.

[0008] In some embodiments of this application, the second housing is inserted into the third housing such that the third housing radially covers the second housing on its outer side.

[0009] In some embodiments of this application, the third housing is made of plastic; the first housing and the second housing are made of plastic or metal.

[0010] In some embodiments of this application, a first reinforcing member is also included; the first reinforcing member covers the first housing.

[0011] In some embodiments of this application, a second reinforcing member is further included. The second reinforcing member is sleeved on the second housing and spaced apart from the outer wall of the second housing to form a buffer space. The lower end of the second reinforcing member extends radially to form a mounting portion, and a mounting hole is formed on the mounting portion to realize the connection with the motor housing.

[0012] In some embodiments of this application, the first reinforcing member and the second reinforcing member are integrally formed.

[0013] In some embodiments of this application, the buffer space is filled with a buffer element.

[0014] In some embodiments of this application, a third reinforcing member is also included, which is disposed between the second housing and the buffer member or in the annular mounting groove of the third housing.

[0015] A second aspect of this application provides a centrifugal pump head, including the centrifugal pump casing and a rotor as described above, wherein the rotor is disposed in the pump chamber without contact and is capable of rotating about the axial direction.

[0016] A third aspect of this application provides a centrifugal pump, including the centrifugal pump head and a motor as described above, wherein a recessed space is formed on the motor, and a third housing is capable of being inserted into the recessed space, and the centrifugal pump housing and the motor housing are connected by fasteners.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects: The centrifugal pump casing of the present application includes a first casing, a second casing, and a third casing; the first casing and the third casing are respectively covered at both ends of the second casing and enclose to form a pump cavity; a first fluid channel is formed on the end face of the first casing away from the pump cavity, and the first fluid channel is configured as either a pump inlet or a pump outlet; a second fluid channel is formed on the side of the second casing that is orthogonally distributed to the fluid direction of the first flow channel, and the second fluid channel is configured as either a pump inlet or a pump outlet; the centrifugal pump casing is designed as a split three-part casing, which not only facilitates the processing of the pump casing, but also allows for different materials to be configured for each part of the casing to adapt to different scenario requirements, thereby improving the adaptability and application range of the pump head.

[0018] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit this document. Attached Figure Description

[0019] The accompanying drawings, which form part of this document, are used to provide a further understanding of the document. The illustrative embodiments and descriptions herein are used to explain the document and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a centrifugal pump casing provided in an exemplary embodiment of this application; Figure 2 This is a front view of the centrifugal pump casing provided in an exemplary embodiment of this application; Figure 3 yes Figure 2 Sectional view at point AA; Figure 4 This is a schematic diagram of the structure of a centrifugal pump casing provided in an exemplary embodiment of this application; Figure 5 This is a front view of the centrifugal pump casing provided in an exemplary embodiment of this application; Figure 6 This is the book Figure 5 Sectional view at point BB; Figure 7 yes Figure 6 Enlarged view at point A in the middle; Figure 8 This is a schematic diagram of the structure of a centrifugal pump casing provided in an exemplary embodiment of this application; Figure 9 This is a front view of the centrifugal pump casing provided in an exemplary embodiment of this application; Figure 10 yes Figure 9 Sectional view at CC; Figure 11 This is a schematic diagram of the structure of a centrifugal pump provided in an exemplary embodiment of this application.

[0020] In the picture: 10. Centrifugal pump casing; 20. Rotor; 30. Motor; 101. First housing; 1011. First inclined surface; 1012. Second inclined surface; 102. Second housing; 103. Third housing; 1031. First boss; 104. First seal; 105. Second seal; 106. Pump chamber; 107. First fluid channel; 108. Second fluid channel; 109. First reinforcement; 110. Second reinforcement; 111. Third reinforcement; 1111. Second boss; 1112. Third boss; 112. Buffer; 1121. Fourth boss. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0022] Magnetic levitation pumps, with their advantages of no mechanical contact and no friction, have become core fluid transport equipment in industries such as semiconductors, chemicals, and pharmaceuticals. The design of their pump head structure must cope with extreme operating conditions in various scenarios: in the semiconductor field, the ultra-cleanliness requirements necessitate that the pump head material avoid metal ion contamination; the chemical industry requires explosion-proof certification. In existing technologies, due to the structure and material design of the pump casing, the pump head cannot be adapted to various application scenarios, thus limiting its application range.

[0023] Based on this, an exemplary embodiment of this application provides a centrifugal pump casing, a centrifugal pump head, and a centrifugal pump. The centrifugal pump casing includes a first housing, a second housing, and a third housing. The first housing and the third housing are respectively disposed on both ends of the second housing and enclose to form a pump cavity. A first fluid channel is formed on the end face of the first housing away from the pump cavity, and the first fluid channel is configured as either a pump inlet or a pump outlet. A second fluid channel is formed on the side of the second housing, which is orthogonally distributed to the fluid direction of the first flow channel and is configured as either a pump inlet or a pump outlet. The centrifugal pump casing is designed as a split three-part casing, which not only facilitates the processing of the pump casing, but also allows for different materials to be configured for each part of the casing to adapt to different scenario requirements, thereby improving the adaptability and application range of the pump head.

[0024] Example 1: An exemplary embodiment of this application provides a centrifugal pump casing, such as... Figures 1 to 10As shown, the centrifugal pump casing includes a first casing 101, a second casing 102, and a third casing 103. The first casing 101 and the third casing 103 respectively cover both ends of the second casing 102, and the first casing 101, the second casing 102, and the third casing 103 enclose a pump cavity 106. A first sealing element 104 is provided between the first casing 101 and the second casing 102 to achieve a seal between the first casing 101 and the second casing 102. The position of the first sealing element 104 is not limited and can be a radial seal, an axial seal, or a mechanical seal. A second sealing element 105 is provided between the second casing 102 and the third casing 103 to achieve a seal between the second casing 102 and the third casing 103. The position of the second sealing element 105 is not limited and can be a radial seal, an axial seal, or a mechanical seal.

[0025] A first fluid channel 107 is formed on the first housing 101. Preferably, the first fluid channel 107 is disposed perpendicular to the end face of the first housing 101 and communicates with the pump chamber 106. The first fluid channel 107 is configured as either a pump inlet or a pump outlet. A second fluid channel 108 is formed on the side of the second housing 102. The second fluid channel 108 communicates with the pump chamber 106 and is configured as either a pump inlet or a pump outlet. Preferably, the fluid directions of the second fluid channel 108 and the first fluid channel 107 are orthogonal. For example, when the first fluid channel 107 is a pump inlet, the second fluid channel 108 is a pump outlet.

[0026] like Figure 3 As shown, the end face of the first housing 101 that contacts the pump chamber 106 forms a first inclined surface 1011 that surrounds the first fluid channel 107 and is inclined circumferentially. The first inclined surface 1011 is configured to gradually approach the third housing 103 as it extends circumferentially from the first fluid channel 107. The first inclined surface 1011, which is gradually inclined from the center to both sides of the circumference, can adapt to the inclined surface of the end cover of the rotor 20 and adapt to the distance between the first housing 101 and the rotor 20.

[0027] A second inclined surface 1012 is also formed on the first housing 101. The second inclined surface 1012 is configured to gradually move away from the third housing 103 as it extends circumferentially from the intersection with the first inclined surface 1011. In this way, the second fluid passage 108 can be avoided, thus meeting the pump's head requirements.

[0028] like Figure 3Alternatively, as shown in Figure 10, the second housing 102 may have an inclined inner wall; the inclined inner wall is configured such that the radial dimension of the pump chamber 106 gradually decreases from the first housing 101 to the third housing 103. The second housing 102 may also have a vertical inner wall extending in the axial direction. For example, in the semiconductor field, where ultra-cleanliness requirements necessitate that the pump head material avoid metal ion contamination, the first housing 101 and the second housing 101 may be made of wear-resistant plastic; in the chemical industry, where explosion-proof requirements are met, the first housing 101 and the second housing 101 may be made of metal material; the third housing 103 is made of plastic, allowing the sensor in the motor 30 to penetrate the third housing 103 to detect the rotor 20.

[0029] There are various ways in which the second housing 102 and the third housing 103 can be fitted together, for example, such as Figure 3 As shown, the third housing 103 can be inserted into the second housing 102, such that the second housing 102 radially covers the third housing 103 on its outer side. Figure 10 As shown, the second housing 102 can be inserted into the third housing 103, such that the third housing 103 radially covers the second housing 102 on the outside.

[0030] Example 2: An exemplary embodiment of this application provides a centrifugal pump casing, which, based on the above embodiment 1, is as follows: Figures 4 to 7 As shown, the centrifugal pump casing in this embodiment also includes a first reinforcing member 109; the first reinforcing member 109 covers the first housing 101. The first reinforcing member 109 can be connected to the first housing 101 or the second housing 102 by fasteners. The first reinforcing member 109 can enhance the structural strength of the centrifugal pump casing in the axial direction, reduce the deformation of the centrifugal pump casing in the axial direction, and effectively prevent liquid leakage of the pump under high temperature and high pressure environments. The first reinforcing member 109 can be made of metal.

[0031] Preferably, the centrifugal pump casing further includes a second reinforcing member 110, such as... Figure 6 As shown, the second reinforcing member 110 is sleeved on the second housing 102 and spaced apart from the outer wall of the second housing 102 to form a buffer space. The second reinforcing member 110 can enhance the structural strength of the centrifugal pump housing in the radial direction and reduce deformation in the radial direction. The second reinforcing member 110 can be made of metal. The buffer space can be filled with a buffer member 112, which is preferably made of non-metallic material. The filled buffer member 112 can not only improve the structural strength of the centrifugal pump housing and reduce deformation in the radial direction, but also reduce the heat generated by the second reinforcing member 110 due to eddy currents by reducing the interaction area between the second reinforcing member 110 and the magnetic yoke of the motor 30.

[0032] The top end of the second reinforcing member 110 is fixedly connected to the second housing 102, and the lower end extends radially to form a mounting portion. A mounting hole is formed on the mounting portion to realize the connection with the motor housing. The first reinforcing member 109 and the second reinforcing member 110 can be integrally formed or can be designed separately. For example, the first reinforcing member 109 and the second reinforcing member 110 are fixed to the second housing 102 or the buffer member 112 by fasteners.

[0033] Preferably, the centrifugal pump casing further includes a third reinforcing member 111, which may be made of metal. For example... Figure 7 As shown, the third reinforcing member 111 can be disposed between the second housing 102 and the buffer member 112; the third housing 103 extends radially outward to form a first boss 1031, the two ends of the third reinforcing member 111 extend radially to form a second boss 1111 and a third boss 1112 respectively, and the buffer member 112 extends radially inward to form a fourth boss 1121. The first boss 1031 and the second boss 1111 cooperate with each other, and the third boss 1112 and the fourth boss 1121 cooperate with each other. When the first reinforcing member 109 and the second reinforcing member 110 are fixed on the buffer member 112 by fasteners, the cooperation of the above-mentioned boss structure can make the reinforcing member 111, the first housing 101, the second housing 102, the third housing 103, the first reinforcing member 109, the second reinforcing member 110, and the buffer member 112 assembled into one unit. When replacing the pump head, the pump head can be disassembled and assembled in an integrated manner, improving the efficiency of pump head replacement. Figure 10 As shown, the third reinforcing member 111 can be set in the annular mounting groove of the third housing 103 for easy installation.

[0034] Example 3: An exemplary embodiment of this application provides a centrifugal pump head, including a centrifugal pump casing 10 of embodiment 1 or embodiment 2 and a rotor 20. The rotor 20 is disposed in the pump chamber 106 without contact and is capable of rotating about the axial direction.

[0035] Example 4: An exemplary embodiment of this application provides a centrifugal pump, such as Figure 11 As shown, the centrifugal pump includes the centrifugal pump head of embodiment 3 and a motor 30. A concave space is formed on the motor 30, and the third housing 103 can be inserted into the concave space. The centrifugal pump housing 10 and the motor housing are connected by fasteners.

[0036] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0037] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0038] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, the intent of this application also includes these modifications and variations.

Claims

1. A centrifugal pump casing, characterized in that, The system includes a first housing (101), a second housing (102), and a third housing (103); the first housing (101) and the third housing (103) are respectively disposed on both ends of the second housing (102) and enclose to form a pump chamber (106); a first sealing element (104) is provided between the first housing (101) and the second housing (102); a second sealing element (105) is provided between the second housing (102) and the third housing (103); a first fluid channel (107) is formed on the first housing (101), and the first fluid channel (107) is configured as either a pump inlet or a pump outlet; a second fluid channel (108) is formed on the side of the second housing (102), and the second fluid channel (108) is configured as either a pump inlet or a pump outlet.

2. The centrifugal pump casing according to claim 1, characterized in that, The end face of the first housing (101) that contacts the pump chamber (106) forms a first inclined surface (1011) that surrounds the first fluid channel (107) and is inclined in the circumferential direction. The first inclined surface (1011) is configured to gradually approach the third housing (103) as it extends circumferentially from the first fluid channel (107).

3. The centrifugal pump casing according to claim 2, characterized in that, A second inclined surface (1012) is also formed on the first housing (101), the second inclined surface (1012) being configured to gradually move away from the third housing (103) as it extends circumferentially from the intersection with the first inclined surface (1011).

4. The centrifugal pump casing according to claim 1, characterized in that, The third housing (103) is inserted into the second housing (102) such that the second housing (102) radially covers the third housing (103) on the outside.

5. The centrifugal pump casing according to claim 1, characterized in that, The second housing (102) is inserted into the third housing (103) such that the third housing (103) radially covers the second housing (102) on the outside.

6. The centrifugal pump casing according to claim 1, characterized in that, The third housing (103) is made of plastic; the first housing (101) and the second housing (102) are made of plastic or metal.

7. The centrifugal pump casing according to claim 1, characterized in that, It also includes a first reinforcing member (109); the first reinforcing member (109) covers the first housing (101).

8. The centrifugal pump casing according to claim 7, characterized in that, It also includes a second reinforcing member (110), which is sleeved on the second housing (102) and spaced apart from the outer wall of the second housing (102) to form a buffer space; the lower end of the second reinforcing member (110) extends radially to form a mounting part, and a mounting hole is formed on the mounting part to realize the connection with the motor housing.

9. The centrifugal pump casing according to claim 8, characterized in that, The first reinforcing member (109) and the second reinforcing member (110) are integrally formed.

10. The centrifugal pump casing according to claim 8, characterized in that, The buffer space is filled with a buffer element (112).

11. The centrifugal pump casing according to claim 10, characterized in that, It also includes a third reinforcing member (111), which is disposed between the second housing (102) and the buffer member (112) or in the annular mounting groove of the third housing (103).

12. A centrifugal pump head, characterized in that, The centrifugal pump includes a pump casing (10) and a rotor (20) as described in any one of claims 1 to 11, wherein the rotor (20) is disposed in the pump chamber (106) without contact and is rotatable about the axial direction.

13. A centrifugal pump, characterized in that, Includes a centrifugal pump head as described in claim 12 and a motor (30), wherein a concave space is formed on the motor (30), and the third housing (103) can be inserted into the concave space, and the centrifugal pump housing (10) and the motor housing are connected by fasteners.

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