Water-cooling machine shell suitable for dry vacuum pump

Abstract

The utility model relates to a water-cooling machine shell of a vacuum pump, in particular to a water-cooling machine shell suitable for a dry vacuum pump. Comprising a spiral water cooling pipe arranged in a machine shell. Four grooves are evenly formed in the outer wall of the machine shell in the circumferential direction. A water cooling pipe fixing groove is formed in each groove and is used for fixing the spiral water cooling pipe; the two ends of each water cooling pipe fixing groove are each provided with a through hole, and a set of penetrating-out holes are formed and used for guiding the spiral water cooling pipes to penetrate through and be positioned. The groove structures with the water cooling pipe fixing grooves are evenly arranged on the outer wall of the machine shell, so that precise positioning and stable fixing of the spiral water cooling pipe are achieved. Efficient circulating heat dissipation of the cooling liquid is ensured, and assembling and positioning are convenient.

Description

Technical Field

[0001] This utility model relates to a water-cooled housing for a vacuum pump, and more particularly to a water-cooled housing suitable for a dry vacuum pump. Background Technology

[0002] During the operation of dry vacuum pumps, the water-cooled housing plays a crucial role in maintaining the stability and service life of the equipment. Currently, the casting process for water-cooled housings of dry vacuum pumps generally employs a method of fixing the cooling pipes with metal brackets before casting to prevent the cooling pipes from shifting due to the impact of molten metal during pouring.

[0003] However, due to the limitations of the housing structure, the metal bracket can only clamp the straight sections of the water-cooling pipes extending outside the vacuum pump housing. This makes the water-cooling pipes highly susceptible to misalignment during the casting process. The existing vacuum pump water-cooled housing structure suffers from poor water-cooling pipe fixation, creating a risk of pipe misalignment during casting, which in turn affects the cooling performance and overall quality of the housing. To address the difficulties in clamping the water pipes and the tendency for misalignment during housing production, improvements to the existing dry vacuum pump water-cooled housing structure and casting process are urgently needed. Summary of the Invention

[0004] This utility model addresses the shortcomings of existing technologies by providing a water-cooled housing suitable for dry vacuum pumps.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a water-cooled housing suitable for dry vacuum pumps, comprising a spiral water-cooling tube disposed within the housing; four grooves are evenly arranged on the outer wall of the housing in the circumferential direction; each groove is provided with a water-cooling tube fixing groove for fixing the spiral water-cooling tube; each end of each water-cooling tube fixing groove is provided with a through hole, forming a set of through holes for guiding the spiral water-cooling tube through and positioning.

[0006] Furthermore, the inner diameter of the through hole is equal to or greater than the outer diameter of the spiral water-cooling pipe by 1-2 mm.

[0007] Furthermore, the spiral water-cooling tube is made of stainless steel with a bright annealed finish.

[0008] Furthermore, the diameter, pitch, and total number of turns of the spiral water-cooling pipe can be adjusted according to heat dissipation requirements to adapt to different models of housings.

[0009] Furthermore, the depth and width of the water-cooled pipe fixing groove are matched with the outer diameter of the spiral water-cooled pipe.

[0010] Furthermore, the two ends of the spiral water-cooling pipe pass through the water inlet and water outlet of the casing, respectively, forming a coolant circulation channel.

[0011] Furthermore, the spiral water-cooling pipe adopts a three-turn spiral winding structure, wherein:

[0012] Located in the transition area between the inlet and outlet water interfaces, the spiral water-cooling tube forms a complete three-turn winding between adjacent grooves;

[0013] In the end areas near the water inlet and outlet interfaces, the water cooling pipe needs to reduce one turn of winding due to the interface outlet; correspondingly, three water cooling pipe fixing slots are provided in some grooves to fix three turns of water cooling pipe, and two water cooling pipe fixing slots are provided in the other grooves to fix two turns of water cooling pipe.

[0014] Furthermore, in the four grooves, three water-cooling pipe fixing grooves are provided in each of the two opposite grooves, and two water-cooling pipe fixing grooves are provided in each of the other two opposite grooves.

[0015] Furthermore, the axial cross-section of the groove is trapezoidal, and its opening width is greater than the bottom width of the groove, forming a guide slope to facilitate the assembly and positioning of the spiral water-cooling pipe.

[0016] Furthermore, the water-cooling pipe fixing groove in the groove is arranged perpendicular to the length direction of the groove.

[0017] Compared with the prior art, this utility model has the following advantages.

[0018] This invention effectively solves the technical problem of unstable water-cooling pipe fixation and easy displacement during the casting process of traditional dry vacuum pump water-cooled housings by optimizing the water-cooled housing structure design. It achieves precise positioning and stable fixation of the spiral water-cooling pipes by evenly arranging grooves with water-cooling pipe fixing slots on the outer wall of the housing; the spiral winding structure combined with the trapezoidal cross-section groove design ensures efficient circulation and heat dissipation of the coolant while facilitating assembly and positioning. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0020] Figure 1-2 This is a three-dimensional structural diagram of the water-cooled housing of a dry vacuum pump, applicable to an embodiment.

[0021] Figure 3 This is a schematic diagram of the water-cooled pipe structure in an embodiment.

[0022] Figure 4 This is a front view of the water-cooled casing of the dry vacuum pump in the embodiment.

[0023] Figure 5 This is a schematic diagram of the structure of the water-cooled housing without water-cooling pipes in the embodiment.

[0024] Figure 6This is a schematic diagram showing the layout of the grooves on the water-cooled housing in an embodiment.

[0025] Figure 7 This is the front view of the mold for the water-cooled housing in the embodiment.

[0026] Figure 8 This is a diagram of the internal structure of the mold in the embodiment.

[0027] Figure 9 This is a diagram of the internal structure of the mold in the embodiment.

[0028] In the diagram, 1 is the housing; 2 is the water-cooling pipe; 3 is the groove; 4 is the water-cooling pipe fixing groove; 5 is the through hole; 6 is the water inlet interface; 7 is the water outlet interface; 8 is the end of the water-cooling pipe; 9 is the upper mold; and 10 is the lower mold. Detailed Implementation

[0029] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0030] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The singular forms “a,” “the,” and “the” as used in the embodiments of this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0031] Depending on the context, words like "if" or "suppose" used here can be interpreted as "when" or "when". Similarly, it depends on the context.

[0032] For ease of understanding, the embodiments of this disclosure will be described in detail first.

[0033] like Figure 1-9 As shown, a water-cooled housing suitable for a dry vacuum pump includes a spiral water-cooling tube 2 disposed within the housing 1. Four grooves 3 are evenly arranged circumferentially on the outer wall of the housing 1. Each groove 3 contains a water-cooling tube fixing groove 4 for fixing the spiral water-cooling tube 2. Each end of each water-cooling tube fixing groove 4 has a through hole 5, forming a set of through holes for guiding and positioning the spiral water-cooling tube 2. By evenly arranging the grooves 3 on the outer wall of the housing 1 and setting the water-cooling tube fixing grooves 4 within the grooves 3, the spiral water-cooling tube 2 is positioned during the casting process, effectively preventing displacement caused by molten metal impact and improving the assembly accuracy of the water-cooling tube.

[0034] Preferably, the inner diameter of the through hole 5 is equal to or greater than the outer diameter of the spiral water-cooling pipe 2 by 1-2 mm.

[0035] Preferably, the spiral water-cooling tube 2 is made of stainless steel with a bright annealed finish.

[0036] Preferably, the diameter, pitch, and total number of turns of the spiral water-cooling pipe 2 are adjusted according to the heat dissipation requirements to adapt to different models of housings.

[0037] Preferably, the depth and width of the water-cooled pipe fixing groove 4 are matched with the outer diameter of the spiral water-cooled pipe 2.

[0038] Preferably, the two ends of the spiral water-cooling pipe 2 (i.e., the water-cooling pipe ends 8) pass through the water inlet 6 and water outlet 7 of the housing 1 respectively, forming a coolant circulation channel.

[0039] Preferably, the spiral water-cooling tube 2 adopts a three-turn spiral winding structure, wherein: in the transition area between the water inlet 6 and the water outlet 7, the spiral water-cooling tube 2 forms a complete three-turn winding between adjacent grooves 3; in the end area near the water inlet 6 and the water outlet 7, the water-cooling tube 2 reduces one turn of winding due to the need for the interface to be led out; correspondingly, three water-cooling tube fixing grooves 4 are provided in some grooves 3 to fix the three-turn water-cooling tube, and two water-cooling tube fixing grooves 4 are provided in the remaining grooves 3 to fix the two-turn water-cooling tube. The spiral water-cooling tube 2 adopts a three-turn winding structure, which, together with the water inlet 6 and the water outlet 7, forms a cooling circulation channel, ensuring uniform flow of coolant, improving heat dissipation efficiency, and ensuring stable operation of the dry vacuum pump.

[0040] Preferably, in the four grooves 3, three water-cooling pipe fixing grooves 4 are provided in each of the two opposite grooves, and two water-cooling pipe fixing grooves 4 are provided in each of the other two opposite grooves.

[0041] Preferably, the axial cross-section of the groove 3 is trapezoidal, with its opening width greater than the bottom width, forming a guide slope to facilitate the assembly and positioning of the water-cooling pipe 2. The trapezoidal design facilitates the assembly and positioning of the water-cooling pipe 2, while the depth and width of the water-cooling pipe fixing groove 4 are strictly matched with the outer diameter of the spiral water-cooling pipe 2, avoiding deformation or misalignment of the cooling pipe during casting and improving the overall casting quality of the casing.

[0042] Preferably, the water-cooled pipe fixing groove 4 in the groove 3 is arranged perpendicular to the length direction of the groove 3.

[0043] Example: A method for manufacturing the water-cooled housing of a dry vacuum pump includes:

[0044] 1. The housing mold adopts a split structure, including an upper mold 9 and a lower mold 10, which are fastened together to form a complete casting cavity. The inner wall of the mold has raised structures corresponding to the groove 3, water cooling pipe fixing groove 4 and through hole 5 on the outer wall of the housing 1, to ensure that the housing is formed with precise water cooling pipe installation positions after casting.

[0045] 2. Arrange the spiral water-cooling pipes 2 according to the designed path and embed them into the positioning grooves of the lower mold, so that the two ends of the water-cooling pipes are aligned with the positions of the water inlet 6 and the water outlet 7, respectively. Use the grooves 3 and the water-cooling pipe fixing grooves 4 of the mold to temporarily fix the water-cooling pipes and prevent them from shifting during the casting process.

[0046] 3. Snap the upper mold and lower mold together to ensure the cavity is sealed. Then, pour molten metal (such as cast iron or aluminum alloy) into the mold. As the molten metal flows, it is constrained by the protruding structures inside the mold, so that the final formed housing 1 automatically forms the groove 3, the water cooling pipe fixing groove 4, and the through hole 5, etc.

[0047] 4. After the molten metal cools and solidifies, open the mold and remove the casting. Since the water-cooling pipe 2 has been encased and fixed by the metal during the casting process, the housing 1 and the water-cooling pipe 2 form an integral structure, requiring no additional welding or assembly.

[0048] 5. Deburr and clean the surface of the casting, and check the unobstructed flow of water-cooling pipe 2 to ensure that the coolant circulation channel is unblocked. Finally, perform a pressure test on casing 1 to verify its sealing and cooling performance.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "preferred embodiment," "detailed description," or "preferred embodiment," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Therefore, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the claims of this utility model.

Claims

1. A water-cooled casing suitable for use in a dry vacuum pump, characterized in that: It includes a spiral water-cooling pipe (2) installed inside the housing (1); four grooves (3) are evenly arranged on the outer wall of the housing (1) in the circumferential direction; each groove (3) is provided with a water-cooling pipe fixing groove (4) for fixing the spiral water-cooling pipe (2); each water-cooling pipe fixing groove (4) has a through hole (5) at both ends to form a set of through holes for guiding the spiral water-cooling pipe (2) through and positioning.

2. The water-cooled housing for a dry vacuum pump according to claim 1, characterized in that, The inner diameter of the through hole (5) is equal to or greater than the outer diameter of the spiral water-cooled pipe (2) by 1-2 mm.

3. The water-cooled housing for a dry vacuum pump according to claim 1, characterized in that, The spiral water-cooled tube (2) is made of stainless steel glow annealed tube.

4. The water-cooled housing for a dry vacuum pump according to claim 1, characterized in that, The diameter, pitch and total number of turns of the spiral water-cooling pipe (2) are adjusted according to the heat dissipation requirements to adapt to different models of housings.

5. The water-cooled housing for a dry vacuum pump according to claim 1, characterized in that, The depth and width of the water-cooled pipe fixing groove (4) are matched with the outer diameter of the spiral water-cooled pipe (2).

6. The water-cooled housing for a dry vacuum pump according to claim 1, characterized in that, The two ends of the spiral water-cooling pipe (2) pass through the water inlet (6) and water outlet (7) of the casing (1) respectively, forming a coolant circulation channel.

7. The water-cooled housing for a dry vacuum pump according to claim 6, characterized in that: The spiral water-cooled pipe (2) adopts a three-turn spiral winding structure, wherein: In the transition area between the water inlet (6) and the water outlet (7), the spiral water cooling tube (2) forms a complete three-turn winding between adjacent grooves (3); In the end area near the water inlet (6) and water outlet (7), the water cooling pipe (2) needs to reduce one turn of winding due to the interface leading out; correspondingly, three water cooling pipe fixing grooves (4) are provided in some grooves (3) to fix three turns of water cooling pipe, and two water cooling pipe fixing grooves (4) are provided in the remaining grooves (3) to fix two turns of water cooling pipe.

8. The water-cooled housing according to claim 7, characterized in that: In the four grooves (3), three water-cooling pipe fixing grooves (4) are provided in each of the two opposite grooves, and two water-cooling pipe fixing grooves (4) are provided in each of the other two opposite grooves.

9. The water-cooled housing for a dry vacuum pump according to any one of claims 1-8, characterized in that: The axial cross section of the groove (3) is trapezoidal, and its opening width is greater than the bottom width of the groove, forming a guide slope to facilitate the assembly and positioning of the spiral water-cooled pipe (2).

10. The water-cooled housing for a dry vacuum pump according to any one of claims 1-8, characterized in that: The water-cooled pipe fixing groove (4) in the groove (3) is arranged perpendicular to the length direction of the groove (3).

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