Pump body assembly and fluid machine

Abstract

The invention provides a pump body assembly and a fluid machine. The pump body assembly comprises an air cylinder, the air cylinder is provided with a buffering groove and a communicating groove which are communicated, and the buffering groove is located in the outer side direction of the communicating groove in the radial direction of the air cylinder. And the filter screen assembly is arranged in the buffer groove, and the filter screen assembly can cover the side, close to the buffer groove, of the communicating groove. The problems that in the prior art, a fluorine pump is large in size and cannot be installed in a narrow and compact occasion, and the packaging cost is high are solved.

Description

Technical Field

[0001] The present invention relates to the field of fluid machinery, and in particular to a pump body assembly and a fluid machinery. Background Art

[0002] In data centers, computer room air conditioners and other fields, liquid pumps are used instead of compressors to drive the refrigerant to run in the system. The pump that drives the refrigerant is called a fluorine pump. Fluorine pumps will produce various impurities during the production process. In order to ensure the stability of the fluorine pump, it needs to be filtered. The traditional solution is to install a filter at the inlet of the fluorine pump. Since the size of the fluorine pump with a filter is much larger than that of the fluorine pump without a filter, a larger space needs to be reserved for the installation of the fluorine pump, resulting in the fluorine pump cannot be installed in small and compact places. At the same time, the packaging size of the fluorine pump with a filter is also much larger, increasing the packaging cost. Summary of the invention

[0003] The main purpose of the present invention is to provide a pump body assembly and a fluid machine to solve the problems in the prior art that the fluorine pump is too large to be installed in a narrow and compact space and has a high packaging cost.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a pump body assembly is provided, including a cylinder, having a buffer groove and a connecting groove connected to each other, and along the radial direction of the cylinder, the buffer groove is located on the outer side of the connecting groove; and a filter assembly, the filter assembly is arranged inside the buffer groove, and the filter assembly can cover the side of the connecting groove close to the buffer groove.

[0005] Furthermore, the filter assembly is attached to the surface of the connecting groove on one side close to the buffer groove; or the filter assembly divides the space in the buffer groove into a pre-filtration area and a post-filtration area, and at least a portion of the surface of the filter assembly facing the post-filtration area is spaced from the surface of the connecting groove on one side close to the buffer groove to form the post-filtration area.

[0006] Further, the filter assembly is arranged along the radial direction of the cylinder toward the ridge away from the connecting groove.

[0007] Furthermore, the filter assembly abuts against the inner wall of the buffer tank through at least three supporting positions.

[0008] Further, the position where the filter assembly abuts against the inner wall of the buffer tank is located on a group of opposite surfaces of the buffer tank.

[0009] Furthermore, the filter assembly is an arc-shaped structure, and the filter assembly is located at both ends of the cylinder in the circumferential direction to form a first abutment portion and a second abutment portion respectively for abutting against the inner wall surface of the buffer groove, and the vertex of the arc-shaped structure abuts against the inner wall of the buffer groove to form a third abutment portion.

[0010] Further, a communication area between the communication groove and the buffer groove is located between the first abutting portion and the second abutting portion.

[0011] Further, the straight-line distance between two edges of the communicating area in the circumferential direction of the cylinder is L1, the connecting line between the first abutting portion and the second abutting portion is L2, and the length of L1 is smaller than the length of L2.

[0012] Furthermore, the length difference between L1 and L2 is greater than or equal to 2 mm.

[0013] Furthermore, the connecting line between the first abutting portion and the second abutting portion is L2, and when the filter assembly is located inside the buffer tank, the vertical distance from the third abutting portion to L2 is L3; when the filter assembly is not installed inside the buffer tank, the vertical distance from the third abutting portion to L2 is L4; wherein L4 / L3 satisfies: 0.9<L4 / L3<0.95.

[0014] Furthermore, the height Hq of the cylinder and the height H1 of the filter assembly satisfy: Hq-H1=±0.005mm.

[0015] Furthermore, the pump body assembly also includes an upper flange and a lower flange located at both axial ends of the cylinder, and a surface of the upper flange and / or the lower flange facing the cylinder is provided with a receiving groove for placing the filter assembly.

[0016] Furthermore, along the axial direction of the cylinder, the height Hq of the cylinder, the height H1 of the filter assembly, the depth H2 of the receiving groove on the upper flange, and the depth H3 of the receiving groove on the lower flange satisfy: Hq+H2+H3-H1=±0.005mm.

[0017] Furthermore, the filter assembly is an elastic structure, and the inner wall of the buffer tank squeezes the filter assembly and causes the filter assembly to be deformed and then supported in the buffer tank.

[0018] Furthermore, the filter assembly includes an outer frame, the outer frame abuts against the buffer tank, and the outer frame has an installation area; and a mesh body, which is arranged at the installation area.

[0019] Furthermore, the end of the outer frame has a flange structure, and the flange structure is folded toward a side away from the connecting groove.

[0020] Furthermore, the folding structure is arc-shaped or right-angled.

[0021] Furthermore, the filter assembly also includes an inner frame, which is arranged on the mesh body, and at least a part of the inner frame is connected to the outer frame.

[0022] Furthermore, the inner frame is a strip-shaped structure and is formed by multiple bendings; or the inner frame filter assembly extends in the length and width directions; or the inner frame includes a plurality of support segments, and two adjacent support segments are spaced apart.

[0023] According to another aspect of the present invention, a fluid machine is provided, comprising the above-mentioned pump body assembly.

[0024] Furthermore, the fluid machinery is a fluorine pump.

[0025] By applying the technical solution of the present invention, the following technical effects are achieved:

[0026] By opening a buffer groove on the cylinder body and setting the filter assembly inside the buffer groove, there is no need to set a separate filter, which can reduce the size of the entire pump body assembly. At the same time, since the filter assembly is directly set inside the pump body assembly, the filter assembly can be installed on the cylinder body alone, or it can be made into a whole with the sealing ring and installed together when the sealing ring is installed. By building the filter assembly in, the installation space of the pump body assembly is reduced, and the fluorine pump including the pump body assembly can be installed in a narrow and compact space, and the volume of the outer packaging box of the fluorine pump can be made smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 The overall structural diagram of the pump assembly of the present application is shown;

[0029] Figure 2 A cross-sectional view of a pump assembly of the present application is shown;

[0030] Figure 3 The structural schematic diagram of the cylinder body of the present application is shown;

[0031] Figure 4 A top view of the cylinder body of the present application is shown;

[0032] Figure 5 A schematic diagram showing the structure of the filter assembly of the present application located in the cylinder body;

[0033] Figure 6 The structural schematic diagram of the filter assembly of the present application is shown;

[0034] Figure 7 An exploded view of the pump assembly of the present application is shown.

[0035] The above drawings include the following reference numerals:

[0036] 10. Cylinder body; 20. Filter assembly; 21. First abutment portion; 22. Second abutment portion; 23. Third abutment portion; 24. External frame; 241. Flanged structure; 25. Mesh body; 26. Internal frame; 30. Buffer tank; 31. Pre-filtration area; 32. Post-filtration area; 40. Connecting tank; 50. Upper flange; 51. Accommodating tank; 60. Lower flange. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0039] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0040] In order to solve the problem that the fluorine pump in the prior art is too large to be installed in a narrow and compact space and has a high packaging cost, the present application provides a fluid machine, wherein the fluid machine is a fluorine pump, and the fluorine pump includes a pump body assembly.

[0041] See also Figures 1 to 5 The pump body assembly includes a cylinder body 10 and a filter assembly 20. The cylinder body 10 has a buffer groove 30 and a connecting groove 40 that are connected. Along the radial direction of the cylinder body 10, the buffer groove 30 is located on the outer side of the connecting groove 40. The filter assembly 20 is arranged inside the buffer groove 30, and the filter assembly 20 can cover the side of the connecting groove 40 close to the buffer groove 30.

[0042] By providing a buffer tank 30 on the cylinder body 10 and setting the filter assembly 20 inside the buffer tank 30, there is no need to set a separate filter, which can reduce the size of the entire pump body assembly. At the same time, since the filter assembly 20 is directly set inside the pump body assembly, the filter assembly 20 can be installed on the cylinder body 10 alone, or it can be made into a whole with the sealing ring and installed together with the sealing ring. By internally placing the filter assembly 20, the installation space of the pump body assembly is reduced, and the fluorine pump including the pump body assembly can be installed in a narrow and compact space, and the volume of the outer packaging box of the fluorine pump can be made smaller.

[0043] In this embodiment, the filter assembly 20 is attached to the surface of the communicating groove 40 on one side close to the buffer groove 30 .

[0044] Specifically, since the filter assembly 20 mainly plays a filtering role, the impurities of the fluid entering the pump body are filtered, and the fluid needs to pass through the connecting groove 40 when entering the pump body. Therefore, the filter assembly 20 is attached to the surface of the connecting groove 40 on one side close to the buffer groove 30 to filter the fluid entering the pump body.

[0045] In another embodiment, the filter assembly 20 divides the space within the buffer tank 30 into a pre-filtration area 31 and a post-filtration area 32, and at least a portion of the surface of the filter assembly 20 facing the post-filtration area 32 is spaced apart from the surface of the connecting groove 40 on the side close to the buffer tank 30 to form the post-filtration area 32.

[0046] Since the fluid will be filtered by the filter assembly 20 located in the buffer tank 30 after entering the buffer tank 30, the filter assembly 20 can divide the buffer tank 30 into a pre-filter area 31 and a post-filter area 32. In order to ensure the filtering effect, the fluid needs to pass through the filter before entering the connecting tank 40, so the post-filter area 32 is formed by the interval between at least a part of the surface of the filter assembly 20 facing the post-filter area 32 and the surface of the connecting tank 40 close to the buffer tank 30. The filtering of the fluid entering the pump body is achieved.

[0047] In this embodiment, the filter assembly 20 is disposed along the radial direction of the cylinder body 10 toward the ridge away from the communicating groove 40 .

[0048] The raised arrangement of the filter assembly 20 enables the filter assembly 20 to be tightly fitted with the buffer groove 30, thereby increasing the stability of the filter installation.

[0049] In this embodiment, the filter assembly 20 abuts against the inner wall of the buffer tank 30 through at least three supporting positions.

[0050] Specifically, the two ends of the filter and the peripheral wall of the filter assembly 20 are in contact with the inner wall of the buffer groove 30, and the inner wall of the buffer groove 30 is connected to the ground through three supporting positions, so that the filter assembly 20 and the buffer groove 30 can be tightly matched, thereby increasing the installation stability of the filter assembly 20. In other embodiments, the peripheral wall of the filter assembly 20 can have multiple supporting positions with the buffer groove 30, further increasing the installation stability of the filter assembly 20.

[0051] In this embodiment, the position where the filter assembly 20 abuts against the inner wall of the buffer tank 30 is located on a set of opposite surfaces of the buffer tank 30 .

[0052] In order to better and stably install the filter assembly 20 in the buffer groove 30, the filter assembly 20 should be close to the buffer groove 30 in the buffer groove 30. In order to achieve the clamping of the filter assembly 20, the position where the filter assembly 20 abuts against the inner wall of the buffer groove 30 is located on a group of relative surfaces of the buffer groove 30. At this time, the filter assembly 20 is clamped by a group of relative side walls of the buffer groove 30, thereby achieving the stability of the installation of the filter assembly 20.

[0053] See also Figure 6 The filter assembly 20 is an arc-shaped structure. The filter assembly 20 is located at both ends of the cylinder body 10 in the circumferential direction to form a first abutment portion 21 and a second abutment portion 22, respectively, for abutting against the inner wall surface of the buffer groove 30. The vertex of the arc-shaped structure abuts against the inner wall of the buffer groove 30 to form a third abutment portion 23.

[0054] Specifically, since the cylinder body 10 is generally circular, the buffer groove 30 provided on the cylinder body 10 should be arc-shaped, and the corresponding filter assembly 20 should also be arc-shaped, so as to be placed in the buffer groove 30. However, in order to increase the stability of the installation of the filter assembly 20, the filter assembly 20 should have multiple abutting connection points with the groove wall of the buffer groove 30, so the filter assembly 20 is located at both ends of the circumferential direction of the cylinder body 10 to form a first abutting portion 21 and a second abutting portion 22 respectively, which are used to abut against the inner wall surface of the buffer groove 30, and the vertex of the arc structure abuts against the inner wall of the buffer groove 30 to form a third abutting portion 23, and the clamping connection between the filter assembly 20 and the buffer groove 30 is realized by the three abutting portions, thereby realizing the stable installation of the filter assembly 20.

[0055] In this embodiment, the communicating area between the communicating groove 40 and the buffer groove 30 is located between the first abutting portion 21 and the second abutting portion 22 .

[0056] Since the filter assembly 20 mainly plays a filtering role, it filters the impurities of the fluid entering the pump body, and the fluid needs to pass through the connecting groove 40 when entering the pump body. In order to ensure that the filtering process can be carried out stably, the connecting area between the connecting groove 40 and the buffer groove 30 is set between the first abutting portion 21 and the second abutting portion 22 to avoid the emergence of unfiltered fluid.

[0057] See also Figure 5 The straight-line distance between the two edges of the communicating area in the circumferential direction of the cylinder body 10 is L1, and the connecting line between the first abutting portion 21 and the second abutting portion 22 is L2, and the length of L1 is less than the length of L2.

[0058] In order to ensure that the filter can filter all fluids entering the connecting groove 40, the straight-line distance between the two edges of the connecting area on the circumference of the cylinder body 10 needs to be smaller than the distance between the first abutment portion 21 and the second abutment portion 22, so that the connecting area can be stably placed between the first abutment portion 21 and the second abutment portion 22.

[0059] Preferably, the length difference between L1 and L2 is greater than or equal to 2 mm.

[0060] In order to further ensure that the connecting area between the connecting groove 40 and the buffer groove 30 is located between the first abutting portion 21 and the second abutting portion 22, the length difference between L1 and L2 is greater than or equal to 2 mm, so that the filter can better cover the connecting groove 40 and increase the stability of the filtering process.

[0061] See also Figure 5 , the connecting line between the first abutting portion 21 and the second abutting portion 22 is L2, when the filter assembly 20 is located inside the buffer groove 30, the vertical distance from the third abutting portion 23 to L2 is L3; when the filter assembly 20 is not installed inside the buffer groove 30, the vertical distance from the third abutting portion 23 to L2 is L4; wherein L3 / L4 satisfies: 0.9<L3 / L4<0.95.

[0062] In order to increase the stability of the filter assembly 20 when installed in the buffer tank 30, it is necessary to make the filter assembly 20 closely abut against the inner wall of the buffer tank 30. Therefore, before the filter assembly 20 is installed, the vertical distance L4 of the line connecting the third abutting portion 23 and the first abutting portion 21 and the second abutting portion 22 will be greater than the vertical distance L3 of the line connecting the third abutting portion 23 and the first abutting portion 21 and the second abutting portion 22 after the filter is installed. In this way, when the filter is installed in the buffer tank 30, the filter assembly 20 will be squeezed and deformed, thereby achieving the squeeze fixation of the filter assembly 20. When the ratio of L3 / L4 is less than 0.9, the filter assembly 20 will be greatly deformed when the filter assembly 20 is installed, which is not conducive to the installation of the filter assembly 20. When the ratio of L3 / L4 is greater than 0.95, the deformation of the filter assembly 20 is small, which is not conducive to the fixation of the filter assembly 20.

[0063] In this embodiment, along the axial direction of the cylinder body 10 , the height Hq of the cylinder body 10 and the height H1 of the filter assembly 20 satisfy: Hq-H1=±0.005 mm.

[0064] During actual production and processing, there will be an error between the height Hq of the cylinder body 10 and the height H1 of the filter assembly 20. However, in order to ensure the stability of the filter installation, the height difference between the cylinder body 10 and the filter assembly 20 needs to be maintained between 0.005mm. A large error will affect the installation of the filter assembly 20 or the sealing of the remaining components of the pump body assembly.

[0065] See also Figure 7 The pump body assembly also includes an upper flange 50 and a lower flange 60 located at both axial ends of the cylinder body 10. The surface of the upper flange 50 and / or the lower flange 60 facing the cylinder body 10 is provided with a receiving groove 51 for placing the filter assembly 20.

[0066] In order to further increase the stability of the installation of the filter assembly 20, a receiving groove 51 for installing the filter assembly 20 is provided on the upper flange 50 or the lower flange 60 of the pump body assembly, and the filter assembly 20 is further limited and fixed by the receiving groove 51. In the actual production process, the receiving groove 51 can be provided only on the upper flange 50 or the lower flange 60 according to actual needs, or the receiving groove 51 can be provided on both the upper flange 50 and the lower flange 60.

[0067] In this embodiment, along the axial direction of the cylinder body 10, the height Hq of the cylinder body 10, the height H1 of the filter assembly 20, the depth H2 of the receiving groove 51 on the upper flange 50, and the depth H3 of the receiving groove 51 on the lower flange 60 satisfy: Hq+H2+H3-H1=±0.005mm.

[0068] In the actual production process, there will be errors between the actual production data and the theoretical data of the height Hq of the cylinder body 10 (the height of the buffer groove 30), the height H1 of the filter assembly 20, the depth H2 of the receiving groove 51 on the upper flange 50, and the depth H3 of the receiving groove 51 on the lower flange 60. However, in order to ensure the stability of the filter installation, the height difference between the height of the filter assembly 20 and the height of the buffer groove 30 and the receiving groove 51 needs to be maintained between 0.005mm. A large error will affect the installation of the filter assembly 20 or the sealing of the installation of the remaining components of the pump body assembly. Among them, when H2 or H3 is 0, it means that the corresponding receiving groove 51 is not provided on the upper flange 50 or the lower flange 60.

[0069] In the present application, the filter assembly 20 is an elastic structure, and the inner wall of the buffer tank 30 squeezes the filter assembly 20 and causes the filter assembly 20 to be deformed and supported in the buffer tank 30 .

[0070] In order to increase the installation stability of the filter assembly 20, the filter assembly 20 needs to be clamped in the buffer groove 30. In order to ensure the clamping stability, the filter assembly 20 needs to have a certain elasticity. When the filter assembly 20 is installed in the buffer groove 30, the inner wall of the buffer groove 30 will squeeze the filter assembly 20 so that the filter assembly 20 will be deformed, so that the filter assembly 20 can be clamped in the buffer groove 30, thereby increasing the installation stability of the filter assembly 20.

[0071] See also Figure 6The filter assembly 20 includes an outer frame 24 and a mesh body 25. The outer frame 24 is in contact with the buffer tank 30. The outer frame 24 has an installation area; the mesh body 25 is arranged at the installation area.

[0072] Specifically, the outer frame 24 mainly plays the role of support and connection. During the installation process, the outer frame 24 is connected to the inner wall of the buffer tank 30; the mesh body 25 mainly plays a filtering role to prevent impurities in the fluid from entering the cylinder body 10. The mesh body 25 is soft, so it needs an internal frame to help it bear the impact force of the fluid, and the external frame needs to fit tightly with the buffer tank 30. Its external contour must be neat and not easy to deform in order to fit closely with the buffer tank 30. In order to prevent the filter from leaking due to the loose fit between the filter and the buffer tank 30, the filter and the buffer tank 30 adopt an interference fit, so the external frame of the filter must not only be strong and not easily deformed, but also be made of elastic material. After slight deformation, it will generate a large elastic force. This elastic force will clamp the filter in the buffer tank 30 and will not shake under the impact of the fluid.

[0073] See also Figure 6 The end of the outer frame 24 has a flange structure 241, and the flange structure 241 is folded toward a side away from the connecting groove 40. The folded structure is arc-shaped or right-angled.

[0074] By providing the flange structure 241 , the outer frame 24 will be more easily deformed, and when assembled with the buffer groove 30 , it will be easier to get stuck in the buffer groove 30 and fit tightly with the buffer groove 30 .

[0075] In the present application, the filter assembly 20 further includes an inner frame 26 , which is disposed on the mesh body 25 , and at least a portion of the inner frame 26 is connected to the outer frame 24 .

[0076] When the fluid passes through the mesh 25, the mesh 25 will have a certain blocking effect on the fluid, so that the fluid will also generate a force on the mesh 25, especially when there are large impurities on the mesh 25, the generated force will be greater. Since the mesh 25 is soft, the force generated by the fluid flow on the mesh 25 may cause damage to the mesh 25, so an inner frame 26 is provided on the mesh 25 to increase the structural strength of the mesh 25 and increase the stability of the filter.

[0077] In the present application, the inner skeleton 26 is a strip-shaped structure and is bent multiple times; or the inner skeleton 26 extends in the length and width directions of the filter assembly 20; or the inner skeleton 26 includes multiple support segments, and two adjacent support segments are spaced apart.

[0078] The inner frame 26 can be in different shapes, but it needs to extend along the length and width of the filter screen, so as to conduct the force and transfer the force on the mesh body 25 to the outer frame 24. Therefore, the inner frame 26 can be one section or multiple sections. When the inner frame 26 is one section, the inner frame 26 needs to extend along the length and width of the filter screen, so the inner frame 26 can be bent and formed multiple times.

[0079] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0080] 1. By opening a buffer tank 30 on the cylinder body 10 and setting the filter assembly 20 inside the buffer tank 30, there is no need to set a separate filter, which can reduce the size of the entire pump body assembly. At the same time, since the filter assembly 20 is directly set inside the pump body assembly, the filter assembly 20 can be installed on the cylinder body 10 alone, or it can be made into a whole with the sealing ring and installed together with the sealing ring. By installing the filter assembly 20 inside, the installation space of the pump body assembly is reduced, and the fluorine pump containing the pump body assembly can be installed in a small and compact space, and the volume of the outer packaging box of the fluorine pump can be made smaller.

[0081] 2. In order to increase the installation stability of the filter assembly 20, the filter assembly 20 needs to be clamped in the buffer groove 30. In order to ensure the clamping stability, the filter assembly 20 needs to have a certain elasticity. When the filter assembly 20 is installed in the buffer groove 30, the inner wall of the buffer groove 30 will squeeze the filter assembly 20 so that the filter assembly 20 will be deformed, so that the filter assembly 20 can be clamped in the buffer groove 30, thereby increasing the installation stability of the filter assembly 20.

[0082] 3. When the fluid passes through the mesh 25, the mesh 25 will have a certain blocking effect on the fluid, so the fluid will also generate a force on the mesh 25, especially when there are large impurities on the mesh 25, the generated force will be greater. Since the mesh 25 is soft, the force generated by the fluid flow on the mesh 25 may cause damage to the mesh 25, so an internal skeleton 26 is set on the mesh 25 to increase the structural strength of the mesh 25 and increase the stability of the filter. Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0083] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0084] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0085] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pump assembly, characterized in that: include: A cylinder body (10), wherein the cylinder body (10) has a buffer groove (30) and a connecting groove (40) which are connected to each other, and along the radial direction of the cylinder body (10), the buffer groove (30) is located on the outer side of the connecting groove (40); A filter assembly (20), wherein the filter assembly (20) is arranged inside the buffer tank (30), and the filter assembly (20) can cover a side of the connecting tank (40) close to the buffer tank (30).

2. The pump assembly according to claim 1, characterized in that: The filter assembly (20) is attached to the surface of the connecting groove (40) on a side close to the buffer groove (30); or The filter assembly (20) divides the space in the buffer tank (30) into a pre-filtration area (31) and a post-filtration area (32), and at least a portion of the surface of the filter assembly (20) facing the post-filtration area (32) is spaced apart from the surface of the connecting groove (40) on a side close to the buffer tank (30) to form the post-filtration area (32).

3. The pump assembly according to claim 1, characterized in that: The filter assembly (20) is arranged along the radial direction of the cylinder body (10) toward the ridge away from the connecting groove (40).

4. The pump assembly according to claim 1, characterized in that: The filter assembly (20) abuts against the inner wall of the buffer tank (30) via at least three supporting positions.

5. The pump assembly according to claim 1, characterized in that: The position where the filter assembly (20) abuts against the inner wall of the buffer groove (30) is located on a group of opposite surfaces of the buffer groove (30).

6. The pump assembly according to claim 1, characterized in that: The filter assembly (20) is an arc-shaped structure. The filter assembly (20) is located at two ends in the circumferential direction of the cylinder body (10) to form a first abutment portion (21) and a second abutment portion (22) respectively, so as to abut against the inner wall surface of the buffer groove (30). The vertex of the arc-shaped structure abuts against the inner wall of the buffer groove (30) to form a third abutment portion (23).

7. The pump assembly according to claim 6, characterized in that: A communicating area between the communicating groove (40) and the buffer groove (30) is located between the first abutting portion (21) and the second abutting portion (22).

8. The pump assembly according to claim 7, characterized in that: The straight-line distance between the two edges of the connecting area in the circumferential direction of the cylinder body (10) is L1, the connecting line between the first abutting portion (21) and the second abutting portion (22) is L2, and the length of L1 is smaller than the length of L2.

9. The pump assembly according to claim 8, characterized in that: The length difference between L1 and L2 is greater than or equal to 2 mm.

10. The pump assembly according to claim 6, characterized in that: The connecting line between the first abutting portion (21) and the second abutting portion (22) is L2. When the filter assembly (20) is located inside the buffer tank (30), the vertical distance from the third abutting portion (23) to L2 is L3; When the filter assembly (20) is not installed inside the buffer tank (30), the vertical distance between the third abutting portion (23) and L2 is L4; Among them, L4 / L3 satisfies: 0.9<L4 / L3<0.

95.

11. The pump assembly according to claim 1, characterized in that: Along the axial direction of the cylinder body (10), the height Hq of the cylinder body (10) and the height H1 of the filter assembly (20) satisfy: Hq-H1=±0.005 mm.

12. The pump assembly according to claim 1, characterized in that: The pump body assembly further comprises an upper flange (50) and a lower flange (60) located at two axial ends of the cylinder body (10); a surface of the upper flange (50) and / or the lower flange (60) facing the cylinder body (10) is provided with a receiving groove (51) for placing the filter assembly (20).

13. The pump assembly according to claim 12, characterized in that: Along the axial direction of the cylinder body (10), the height Hq of the cylinder body (10), the height H1 of the filter assembly (20), the depth H2 of the receiving groove (51) on the upper flange (50), and the depth H3 of the receiving groove (51) on the lower flange (60) satisfy: Hq+H2+H3-H1=±0.005mm.

14. The pump assembly according to any one of claims 1 to 13, characterized in that: The filter assembly (20) is an elastic structure, and the inner wall of the buffer groove (30) squeezes the filter assembly (20) and causes the filter assembly (20) to deform and then be supported in the buffer groove (30).

15. The pump assembly according to any one of claims 1 to 10, characterized in that: The filter assembly (20) comprises: An exoskeleton (24), the exoskeleton (24) abutting against the buffer groove (30), the exoskeleton (24) having a mounting area; A mesh body (25), wherein the mesh body (25) is arranged at the installation area.

16. The pump assembly according to claim 15, characterized in that The end of the outer frame (24) has a flange structure (241), and the flange structure (241) is folded toward a side away from the connecting groove (40).

17. The pump assembly according to claim 16, characterized in that The folding structure is arc-shaped or right-angled.

18. The pump assembly according to claim 15, characterized in that The filter assembly (20) further comprises an inner frame (26), wherein the inner frame (26) is arranged on the mesh body (25), and at least a portion of the inner frame (26) is connected to the outer frame (24).

19. The pump assembly according to claim 18, characterized in that The inner frame (26) is a strip-shaped structure and is formed by bending multiple times; or The inner frame (26) and the filter assembly (20) extend in length and width directions; or The inner frame (26) comprises a plurality of support segments, and two adjacent support segments are spaced apart.

20. A fluid machine, characterized in that: A pump body assembly comprising any one of claims 1 to 19.

21. The fluid machine according to claim 20, characterized in that: The fluid machinery is a fluorine pump.

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