Water jacket and dry vacuum pump

Abstract

The utility model relates to a water jacket and a dry vacuum pump. The water jacket comprises a shell, reinforcing ribs, water through holes and a water diversion structure. The shell comprises a containing cavity and a liquid flow channel arranged in the shell. The reinforcing ribs are arranged in the liquid flow channel and divide the liquid flow channel into a plurality of cooling cavities. The water through hole is formed in the outer surface of the shell and communicated with the liquid flow channel. And the water diversion structure is arranged on the reinforcing ribs. And the adjacent cooling chambers can be communicated through the water diversion structures. In the cooling process of the dry vacuum pump, the circulation path of cooling liquid in the water jacket is limited by the reinforcing ribs and the water diversion structure, so that the requirements for the flow direction of the cooling liquid under different working conditions are met, application of vacuum pumps of various different schemes and structures is met, and the application range is wide. Layered, staged and regular cooling paths are formed in the water jacket, so that the heat exchange efficiency during cooling is effectively enhanced, and the cooling effect is further improved.

Description

Technical Field

[0001] The present application relates to the field of vacuum pumps, and in particular to a water jacket and a dry vacuum pump. Background Art

[0002] Dry vacuum pump is a vacuum device that uses a pair of screws to rotate synchronously at high speed in opposite directions in the pump housing to produce suction and exhaust effects. Dry screw pumps can extract gases containing a large amount of water vapor and a small amount of dust. They have higher ultimate vacuum, lower power consumption, and have the advantages of energy saving and maintenance-free. They are mainly used in high-purity vacuum processes. They have extremely high vacuum degrees and can adapt to harsh working conditions. They have the ability to extract condensable and particulate gases. They are particularly suitable for clean environments and are easy to be treated with corrosion protection. They are particularly suitable for electronics, chemicals, biomedicine, metal processing, food processing and other fields.

[0003] At present, the temperature control inside the water jacket of the vacuum pump housing is a difficult point. Because the temperature of the suction medium is different under different application conditions of dry vacuum pumps (photovoltaics, lithium batteries, drying, lamination, hydrocarbon cleaning, etc.), the thermal expansion of the internal gas is also inconsistent. In addition, the rotor profile of the vacuum pump designed with a dry screw is inconsistent with the thermal expansion of each section of the gas due to the changes in internal gas compression (such as: equal distance and equal diameter, equal diameter and variable pitch, variable diameter and variable pitch, intermediate compression, end face compression and three-stage compression, etc.). Many cylinder liners of dry vacuum pumps, Roots vacuum pumps and even many internal combustion engines (such as diesel engines and engines) are directly embedded in the water jacket shell for cooling to control temperature. Utility Model Content

[0004] The present application provides a water jacket and a dry vacuum pump to solve some or all of the deficiencies in the related art.

[0005] The present application provides a water jacket, which is applied to a dry vacuum pump, comprising:

[0006] The housing comprises a receiving cavity and a liquid flow channel arranged inside the housing. The receiving cavity extends along a first axis and is used to receive a rotor of the dry vacuum pump. The liquid flow channel is arranged inside the housing around the first axis.

[0007] The reinforcing ribs are arranged in the liquid flow channel and divide the liquid flow channel into a plurality of cooling chambers.

[0008] A water hole is arranged on the outer surface of the shell and is connected to the liquid flow channel.

[0009] and a water diversion structure, which is arranged on the reinforcing rib. Adjacent cooling chambers can be connected through the water diversion structure.

[0010] Optionally, the reinforcing ribs include a plurality of radial ribs, and the plurality of radial ribs are spaced apart and distributed along the first axis to divide the liquid flow channel into a plurality of cooling chambers along the first axis.

[0011] Optionally, the housing includes a first surface, a second surface, a first opening disposed on the first surface, and a second opening disposed on the second surface. The first surface and the second surface are disposed opposite to each other in a second direction. The first opening and the second opening are respectively connected to the liquid flow channel. The second direction is perpendicular to the first axis.

[0012] Optionally, the reinforcing ribs include axial ribs parallel to the first axis. The axial ribs are arranged close to the first opening and divide the cooling chamber into a first sub-chamber and a second sub-chamber. The water diversion structure is arranged as a water diversion groove. The water diversion groove is arranged on the radial ribs.

[0013] Optionally, the radial ribs include a first radial rib and a second radial rib. The water diversion groove includes a first water diversion groove provided on the first radial rib and a second water diversion groove provided on the second radial rib. The first water diversion groove is located in the first sub-chamber. The second water diversion groove is located in the second sub-chamber.

[0014] Optionally, the water diversion structure is configured as a sluice gate, and the sluice gate is used to connect or block the cooling chamber.

[0015] Optionally, the radial rib includes a first through hole arranged along the first axis and a mounting groove arranged along the second direction. The first through hole is connected to the mounting groove. The first through hole is connected to the adjacent cooling chamber. The water gate includes a valve body arranged in the mounting groove. The valve body includes a second through hole penetrating the valve body. The valve body can rotate in the mounting groove so that the first through hole and the second through hole are connected or staggered.

[0016] Optionally, the water gate is arranged on the radial ribs at the first opening and the second opening.

[0017] The present application also provides a dry vacuum pump, comprising a bearing box, a gear box, a rotor and the water jacket described above. The rotor is arranged in the accommodating cavity. The bearing box and the gear box are respectively installed at two ends of the water jacket along the first axis. The two ends of the rotor are respectively connected to the bearing box and the gear box.

[0018] Optionally, the water jacket includes a circulation hole. The circulation hole is arranged on the surface of the water jacket facing the gear box and the surface of the water jacket facing the bearing box. The gear box includes a gear cooling cavity. The bearing box includes a bearing cooling cavity. The gear cooling cavity and the bearing cooling cavity are respectively connected to the liquid flow channel through the circulation hole. The dry vacuum pump also includes a cooling port.

[0019] Wherein, the cooling port is arranged in the gear box and connects the gear cooling cavity with the outside world. And / or, the cooling port is arranged in the bearing box and connects the bearing cooling cavity with the outside world.

[0020] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0021] It can be seen from the above embodiments that during the cooling process of the dry vacuum pump, the flow path of the coolant inside the water jacket is restricted by the reinforcing ribs and the water diversion structure, thereby meeting the requirements for the flow direction of the coolant under different working conditions and the application of vacuum pumps with various schemes and structures, and having a wide range of applications. A layered, staged and regular cooling path is formed inside the water jacket, which effectively enhances the heat exchange efficiency during cooling and temperature reduction, thereby improving its cooling effect.

[0022] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 Schematic diagram of the overall structure of a dry vacuum pump in one embodiment of the present application.

[0025] Figure 2 It is a cross-sectional view of a dry vacuum pump in one embodiment of the present application.

[0026] Figure 3 Schematic diagram of the structure of the water jacket in one embodiment of the present application.

[0027] Figure 4 Schematic diagram of the bottom structure of the water jacket in one embodiment of the present application.

[0028] Figure 5 It is a cross-sectional view of a water jacket in one embodiment of the present application.

[0029] Figure 6It is a cross-sectional view of a dry vacuum pump in another embodiment of the present application.

[0030] Figure 7 This is a schematic diagram of the structure of a water jacket in another embodiment of the present application.

[0031] Figure 8 This is a schematic diagram of the bottom structure of a water jacket in another embodiment of the present application.

[0032] Fig. 9 It is a cross-sectional view of a water jacket in another embodiment of the present application.

[0033] Fig.10 This is a schematic structural diagram of a valve body in another embodiment of the present application.

[0034] Description of reference numerals:

[0035] Dry vacuum pump 100, water jacket 1, shell 11, accommodating chamber 111, liquid flow channel 112, cooling chamber 1121, first sub-chamber 1121a, second sub-chamber 1121b, first surface 113, first opening 1131, second surface 114, second opening 1141, reinforcing rib 12, radial rib 121, first radial rib 121a, second radial rib 121b, first through hole 1211, mounting groove 1212, axial rib 122, water hole 13, water diversion structure 14, water diversion groove 141, sluice 142, valve body 1421, second through hole 1421a, air inlet 15, water channel baffle 16, circulation hole 17, bearing box 2, gear box 3, exhaust port 31, gear cooling chamber 32, cooling port 4, first axis X, second direction Y. DETAILED DESCRIPTION

[0036] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The methods described in the following exemplary embodiments do not represent all methods consistent with the present application. Instead, they are merely examples of devices consistent with some aspects of the present application as detailed in the appended claims.

[0037] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate a quantitative limit, but indicate that there is at least one, and if only "one" is referred to, it will be separately described. "Multiple" or "several" means two or more. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation, and are not limited to one position or one spatial orientation. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. The singular forms "a", "said" and "the" used in this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0038] like Figures 1 to 10 As shown, the present application discloses a dry vacuum pump 100, which includes a water jacket 1, a bearing box 2, a gear box 3 and a rotor (not shown). The water jacket 1 includes a housing 11. The housing 11 includes a housing 111 extending along the first axis X. The housing 111 is used to accommodate the rotor. The two ends of the rotor are respectively connected to the bearing box 2 and the gear box 3 to realize the transmission input and transmission output of the rotor. An air inlet 15 is also provided on the surface of the water jacket 1. The air inlet 15 is connected to the housing 111 and is used to inject air into the pump body.

[0039] During the actual operation of the dry vacuum pump 100, the air sucked in from the air inlet 15 is compressed by the pump body, causing the temperature in the accommodating chamber 111 to rise. At the same time, the lubricating oil filled in the bearing box 2 and the gear box 3 will also be compressed and heated during the operation. The temperature rise inside the dry vacuum pump 100 will lead to a decrease in its working efficiency and damage to its structure.

[0040] Therefore, it is necessary to add a cooling system to cool down the inside of the dry vacuum pump 100. In the embodiment disclosed in the present application, the water jacket 1 also includes a reinforcing rib 12, a water hole 13 and a water diversion structure 14. A liquid flow channel 112 is arranged inside the shell 11. The reinforcing rib 12 is arranged in the liquid flow channel 112, and divides the liquid flow channel 112 into a plurality of cooling chambers 1121. The water diversion structure 14 is arranged on the reinforcing rib 12. Adjacent cooling chambers 1121 can be connected through the water diversion structure 14. The liquid flow channel 112 is arranged inside the shell 11 around the first axis X. The water hole 13 is arranged on the outer surface of the shell 11 and connected to the liquid flow channel 112. Therefore, the external cooling liquid can enter the liquid flow channel 112 through the water hole 13 to cool the gas in the accommodating chamber 111, thereby ensuring the normal operation of the dry vacuum pump 100.

[0041] The reinforcement ribs 12 are provided to divide the internal liquid flow channel 112 into a plurality of cooling chambers 1121. At the same time, the water diversion structure 14 provided on the reinforcement ribs 12 connects the various cooling chambers 1121. In actual use, for example, when the coolant flows into the liquid flow channel 112 from the water hole 13, due to the obstruction of the reinforcement ribs 12, the coolant will first fill the first cooling chamber 1121 and cool down the first cooling chamber 1221; then, the coolant will flow into the next cooling chamber 1121 through the water diversion structure 14 on the reinforcement ribs 12, and then cool down the next cooling chamber 1121. This arrangement allows the flow path of the coolant inside the water jacket 1 to be restricted by the reinforcing ribs 12 and the water diversion structure 14 during the cooling process of the dry vacuum pump 100, thereby meeting the requirements for the flow direction of the coolant under different working conditions and the application of dry vacuum pumps 100 of various schemes and structures, with a wide range of applications; and, it also allows a layered, phased and regular cooling path to be formed inside the water jacket 1, effectively enhancing the heat exchange efficiency during cooling, thereby improving its cooling effect. In addition, the water jacket 1 has a simple structure, a smooth flow path for the internal liquid, and a simple and convenient casting structure. The arrangement of the reinforcing ribs 12 also effectively improves the structural strength of the water jacket 1, ensuring its stability and safety.

[0042] It should be understood that the number of water holes 13 may be only one, that is, liquid injection, cooling and liquid discharge are performed only through one water hole 13. In other embodiments, the number of water holes 13 may include two, and one water hole is used for liquid injection and the other water hole is used for liquid discharge and exhaust, which is beneficial to improve the liquid injection efficiency of the liquid flow channel 112, and realize flow cooling of the accommodating cavity 111, thereby improving the cooling efficiency. Of course, the number of water holes 13 may also be three, four or even more, and the present application does not limit this.

[0043] In the embodiment where the number of water holes 13 includes two or more, the water jacket 1 may further add a temperature sensor (not shown) at some or all of the water holes 13. The temperature sensor can detect the temperature of the coolant at the water holes 13, so that the operator can judge the heat exchange effect in the water jacket 1 by the temperature difference between the liquid inlet and the liquid outlet. According to the heat exchange effect, the operator can control the water pressure and water volume of the cooling liquid inlet and outlet, so as to adjust the heat exchange effect. For example, if the temperature difference between the liquid inlet and the liquid outlet is large, it proves that the temperature inside the water jacket 1 is high. At this time, the operator can adjust the heat exchange effect by increasing the water volume at the liquid inlet or increasing the water pressure.

[0044] like Figure 2 As shown, the bearing box 2 and the gear box 3 are respectively mounted at both ends of the water jacket 1 along the first axis X. In some embodiments, the dry vacuum pump 100 cools the rotor only through the water jacket 1. In other embodiments, the gear box 3 includes a gear cooling cavity 32. The bearing box 2 includes a bearing cooling cavity (not shown). The water jacket 1 includes a circulation hole 17. The circulation hole 17 is arranged on the surface of the water jacket 1 facing the gear box 3 and the surface facing the bearing box 2. The gear cooling cavity 32 and the bearing cooling cavity are respectively connected to the liquid flow channel 112 through the circulation hole 17. In this way, the coolant entering the liquid flow channel 112 through the water hole 13 can also enter the gear cooling cavity 32 and the bearing cooling cavity through the circulation hole 17.

[0045] In order to further improve the cooling efficiency, in some embodiments, the dry vacuum pump 100 further includes a cooling port 4. The cooling port 4 is disposed in the gear box 3 and connects the gear cooling cavity 32 with the outside. The cooling port 4 is also disposed in the bearing box 2 and connects the bearing cooling cavity with the outside. Therefore, the cooling liquid can selectively enter the liquid flow channel 112 through the cooling port 4 located in the gear box 3, the cooling port 4 located in the bearing box 2, or through the water hole 13 of the water jacket 1 to cool the dry vacuum pump 100.

[0046] The dry vacuum pump 100 disclosed in the present application connects the coolant flow passages of the bearing box 2, the water jacket 1 and the gear box 3 in sequence through the setting of the cooling port 4 and the circulation hole 17. When the dry vacuum pump 100 needs to be cooled, for example, the air inlet 15 of the dry pump inhales normal air, and the air is compressed by the dry pump, and a higher temperature will be generated at the exhaust port 31. At this time, the coolant can be introduced from the cooling port 4 on the side of the bearing box 2 to cool the oil in the bearing box 2; then the coolant flows into the water jacket 1 through the circulation hole 17 on the water jacket 1 that is connected to the bearing box 2 to cool the accommodating cavity 111; then the coolant flows into the gear box 3 through the circulation hole 17 on the water jacket 1 that is connected to the gear box 3 to cool the oil in the gear box 3; finally, the coolant flows out from the cooling port 4 on the side of the gear box 3 to complete the internal cooling of the dry vacuum pump 100.

[0047] In another embodiment, the dry pump sucks in high-temperature gas, and the compressed exhaust of the dry pump reaches a very high temperature, which will cause the temperature at the exhaust port 31 to rise sharply. At this time, reverse cooling is required to ensure that the temperature difference between the coolant and the high-temperature gas at each position inside the pump body is the largest, so as to achieve better heat exchange and cooling effects. Therefore, the coolant can be introduced from the cooling port 4 on the side of the gear box 3 to cool the oil in the gear box 3; then it flows into the water jacket 1 and the bearing box 2 in turn through the circulation hole 17 and is cooled respectively, and finally flows out from the cooling port 4 on the bearing box 2. This method can quickly cool the exhaust port 31 position with the highest temperature.

[0048] Of course, due to different manufacturing processes, different rotor designs lead to inconsistent internal temperature field distribution. When the temperature of the target (not shown in the figure) position is high, the coolant can be introduced from the water hole 13 on the water jacket 1, and then flow into the bearing box 2 and the gear box 3 through the flow holes 17 at both ends of the water jacket 1, and finally flow out from the cooling ports 4 of the bearing box 2 and the gear box 3 respectively. In this way, a flow path is achieved in which the coolant flows in from the middle and flows out from both ends, thereby quickly cooling the target position with the highest temperature.

[0049] It can be seen that, through the above-mentioned structural arrangement, a variety of combined flow fields can be formed inside the water jacket 1 for cooling, so that its cooling effect is better. The present application does not limit the circulation mode of the coolant.

[0050] Those skilled in the art may set the position of the cooling port 4 according to the cooling requirement of the dry vacuum pump 100. The cooling port 4 may be provided only in the bearing housing 2, or only in the gear housing 3.

[0051] In some other embodiments, in order to more intelligently control the flow of coolant, the dry vacuum pump 100 may add a temperature sensor at each cooling port 4, and set a variable frequency water pump electrically connected to the temperature sensor, so that the dry vacuum pump 100 receives temperature feedback from the temperature sensor, transmits the electrical signal to the variable frequency water pump, and controls the amount of water through the variable frequency water pump, thereby automating the cooling process of the dry vacuum pump 100 and effectively reducing the workload of the operator.

[0052] The following is an explanation of the specific structure of the water jacket 1. The various embodiments of the present application can be implemented in combination with each other if there is no conflict.

[0053] In some embodiments, the number of radial ribs 121 may be one, and one radial rib 121 divides the liquid flow channel 112 into two cooling chambers 1121. In an optional embodiment, as Figure 3 and Figure 4As shown, the reinforcing rib 12 includes a plurality of radial ribs 121. The plurality of radial ribs 121 are distributed along the first axis X at intervals to divide the liquid flow channel 112 into a plurality of cooling chambers 1121 along the first axis X.

[0054] In the water jacket 1, the radial ribs 121 divide the liquid flow channel 112 into a plurality of cooling chambers 1121. During the cooling process of the water jacket 1, due to the obstruction of the radial ribs 121, the coolant injected into the liquid flow channel 112 through the circulation hole 17 needs to first fill the first cooling chamber 1121 before it can flow into the next chamber from the water diversion structure 14. Such a structural setting enables a set of hierarchical cooling modes to be formed in the water jacket 1. Therefore, it is only necessary to adjust the setting positions of the radial ribs 121 and the water diversion structure 14 to perform targeted cooling on various parts of the water jacket 1. The increase in the number of radial ribs 121 corresponds to an increase in the number of cooling chambers 1121. In this way, the liquid flow channel 112 is divided into a larger number of units, which is conducive to further improving the filling effect of the coolant on the liquid flow channel 112, thereby improving the cooling effect and heat exchange effect.

[0055] Taking the embodiment in which the cooling liquid enters the water jacket 1 from the gear box 3 as an example, when the water jacket 1 needs to be cooled, the cooling liquid will first flow into the cooling chamber 1121 near the air inlet 15 after flowing in from the flow hole 17 shown in the figure. After the chamber is filled with cooling liquid, it can flow into the next chamber, that is, the cooling chamber 1121 arranged in the middle, through the water diversion structure 14 on the radial rib 121. Similarly, after the cooling chamber 1121 in the middle is filled, the cooling liquid will flow into the cooling chamber 1121 far away from the air inlet 15 through the water diversion structure 14. Finally, from Figure 4 The coolant flows out through the flow hole 17 in the middle, thereby cooling the water jacket 1 in a hierarchical, phased and regular manner, effectively avoiding the situation where the coolant flows in through the flow hole 17 but is not fully cooled, and flows out from the flow hole 17 at the other end, thereby ensuring the cooling efficiency of the water jacket 1 and further improving the cooling effect of the dry vacuum pump 100.

[0056] In such Figures 3 to 5 In the illustrated embodiment, the housing 11 includes a first surface 113, a second surface 114, a first opening 1131 disposed on the first surface 113, and a second opening 1141 disposed on the second surface 114. The first surface 113 and the second surface 114 are disposed opposite to each other in the second direction Y. The first opening 1131 and the second opening 1141 are respectively connected to the liquid flow channel 112. The second direction Y is perpendicular to the first axis X. The arrangement of the first opening 1131 and the second opening 1141 in the above structure allows the operator to more intuitively observe the internal structure of the liquid flow channel 112, thereby performing operations such as cleaning, maintenance and processing on the inside of the liquid flow channel 112.

[0057] In an optional embodiment, if Figure 3 As shown, the reinforcing rib 12 includes an axial rib 122 parallel to the first axis X. The axial rib 122 is arranged near the first opening 1131 and divides the cooling chamber 1121 into a first sub-chamber 1121a and a second sub-chamber 1121b. The water diversion structure 14 is arranged as a water diversion groove 141. The water diversion groove 141 is arranged on the radial rib 121.

[0058] Combined with the above, it can be seen that when the coolant is Figure 3 After the air flows into the flow hole 17, it will first be injected into the second sub-chamber 1121b of the cooling chamber 1121 near the air inlet 15. Figure 4 As can be seen in the figure, the bottoms of the first sub-chamber 1121a and the second sub-chamber 1121b of each cooling chamber 1121 are connected, so the coolant flows from the bottom of the second sub-chamber 1121b into the first sub-chamber 1121a of the same cooling chamber 1121, so that the cooling chamber 1121 is completely filled. Subsequently, the coolant in the cooling chamber 1121 flows into the next cooling chamber 1121 from the water guide groove 141. Such a structural arrangement effectively improves the filling effect of the coolant on the cooling chamber 1121, thereby ensuring the cooling efficiency.

[0059] In an optional embodiment, the radial rib 121 includes a first radial rib 121a and a second radial rib 121b, that is, the liquid flow channel 112 is divided into three cooling chambers 1121. The water guide groove 141 includes a first water guide groove provided on the first radial rib 121a and a second water guide groove provided on the second radial rib 121b. The first water guide groove is located in the first sub-chamber 121a. The second water guide groove is located in the second sub-chamber 121b. Figure 3 As an example, according to the embodiment shown in Figure 3 From the perspective of FIG. 1 , the cooling chamber 1121 close to the air inlet 15 is referred to as the left cooling chamber 1121, the cooling chamber 1121 adjacent to the left cooling chamber 1121 is referred to as the middle cooling chamber 1121, and the cooling chamber 1121 away from the air inlet 15 is referred to as the right cooling chamber 1121. However, it should be understood that the flow direction of the coolant is not limited to the left, middle, and right directions described below.

[0060] After the coolant enters the second sub-chamber 1121b of the cooling chamber 1121 on the left side from the circulation hole 17, it fills up the first sub-chamber 1121a through the bottom, then enters the first sub-chamber 1121a of the middle cooling chamber 1121 through the first water diversion groove, and then fills up the second sub-chamber 1121b of the middle cooling chamber 1121 through the bottom. Since the second water diversion groove is arranged at the position where the second radial rib 121b is located in the second sub-chamber 121b, the coolant can enter the second sub-chamber 1121b of the cooling chamber 1121 on the right side through the second water diversion groove in the second sub-chamber 1121b, and then fill up the first sub-chamber 1121a through the bottom. Figure 3 Observing from the negative direction of the first axis X of the coordinate axis shown, the coolant will flow in a counterclockwise direction, a clockwise direction, and then a counterclockwise direction in sequence during the flow process, thereby realizing layered, staged, and regular cooling of the water jacket 1, ensuring the cooling efficiency of the water jacket 1, and further improving the cooling effect of the dry vacuum pump 100.

[0061] Of course, in other embodiments, according to actual use requirements, the position of the water guide groove 141 on the radial rib 121 can be changed by machining, that is, the connection position of different cooling chambers 1121 can be changed. For example: the water guide groove 141 on the first radial rib 121a can be opened to connect the first sub-chamber 1121a of the first cooling chamber 1121 and the second sub-chamber 1121b of the second cooling chamber 1121. At the same time, the water guide groove 141 on the second radial rib 121b can be opened to connect the first sub-chamber 1121a of the second cooling chamber 1121 and the second sub-chamber 1121b of the last cooling chamber 1121. As a result, the water guide groove 141 along the radial rib 121 can be changed. Figure 3 Observing from the negative direction of the first axis X of the coordinate axis, the coolant flows in each cooling chamber 1121 in a counterclockwise direction, that is, a counter-spiral flow.

[0062] Similarly, by changing the position of the water inlet groove 141 and the circulation hole 17, the coolant can also flow in a clockwise direction in each cooling chamber 1121, that is, a positive spiral flow. Or, as mentioned above, it includes both clockwise and counterclockwise mixed spiral flows. Therefore, the dry vacuum pump 100 disclosed in the present application can be used for cooling in different working conditions by changing the position of the circulation hole 17 and the water inlet groove 141, so as to meet the cooling needs in various situations and ensure the cooling effect. This makes the setting of its structure flexible and changeable, and the scope of application is very wide. Therefore, the present application does not limit the setting of structures such as the reinforcing ribs 12, circulation holes 17, and water inlet grooves 141.

[0063] It should be noted that Figure 3The radial ribs 121 of the illustrated embodiment are shown as two, namely, the first radial rib 121a and the second radial rib 121b, but this does not mean that the number of radial ribs 121 can only be two, nor does it mean that the structure described in this embodiment can only be applied when the number of radial ribs 121 is two. In fact, the number of radial ribs 121 can include more, such as three, four, etc. When the number of radial ribs 121 is greater than two, then the two adjacent radial ribs 121 are the first radial rib 121a and the second radial rib 121b.

[0064] In an optional embodiment, if Figures 6 to 10 As shown, the water diversion structure 14 is configured as a water gate 142. The water gate 142 is used to connect or block adjacent cooling chambers 1121, and is arranged on the radial ribs 121 at the first opening 1131 and the second opening 1141. By changing the opening and closing of the water gate 142 at different positions, the flow path of the coolant in the liquid flow channel 112 can be easily changed. For example: flowing from bottom to top in the first cooling chamber 1121, flowing from top to bottom in the second cooling chamber 1121, and flowing from bottom to top in the last chamber. Such a configuration enables hierarchical, staged, and regular cooling to be formed in the water jacket 1, effectively avoiding the situation that the coolant flows out from the flow hole 17 at the other end without being fully cooled after flowing in from the flow hole 17, thereby ensuring the cooling efficiency of the water jacket 1, thereby improving the cooling effect of the dry vacuum pump 100, and also expanding the application range of the water jacket 1.

[0065] from Figure 6 It can be seen that the water jacket 1 also includes a water channel baffle 16. The water channel baffle 16 is arranged in the cooling chamber 1121 and is connected to the bottom of the cooling chamber 1121. In actual application, for example, when the dry pump inhales normal air, the air temperature in the water jacket 1 will not rise to a particularly high level, and rapid cooling is not required. Therefore, it is only necessary to cool the oil in the bearing box 2, the gas inside the water jacket 1, and the oil in the gear box 3 in this order. Therefore, the coolant is introduced through the cooling port 4 on the side of the bearing box 2, and after passing through the cooling port 4, the coolant is cooled. Figure 7 The flow hole 17 shown flows into the water channel baffle 16. Since the water channel baffle 16 is connected to the bottom of the cooling chamber 1121, by adjusting the opening and closing of each water gate 142, the coolant will fill the first cooling chamber 1121 from bottom to top. Then, it flows into the middle cooling chamber 1121 through the water gate 142 set at the top of the cooling chamber 1121. Closing the water gate 142 at the top of the middle cooling chamber 1121 and opening the water gate 142 at the bottom will allow the coolant to flow directly through the bottom into the last cooling chamber 1121, and fill the water channel baffle 16 connected to the last cooling chamber 1121. Finally, through the water gate 142 at the top of the middle cooling chamber 1121, the coolant will flow directly into the last cooling chamber 1121 through the bottom, and fill the water channel baffle 16 connected to the last cooling chamber 1121. Figure 8The flow hole 17 shown in the figure flows into the gear box 3. This method can slowly control the temperature of the pump body and achieve gentle cooling.

[0066] Similarly, when high-temperature gas is inhaled, the exhaust temperature reaches a very high level after the compression of the dry pump. Since the heat exchange effect of water countercurrent is better than that of cocurrent, the coolant needs to be quickly cooled in a countercurrent manner, and the coolant is preferably introduced into the cooling chamber 1121 on the side of the exhaust port 31, and heat exchange needs to be performed in a countercurrent manner. Therefore, by adjusting the opening and closing of each water gate 142, the coolant can first fill the cooling chamber 1121 near the exhaust port 31 from bottom to top, then flow through the middle cooling chamber 1121 from top to bottom, and finally fill the cooling chamber 1121 near the air inlet 15 from bottom to top. Thus, the cooling is performed in the order of cooling the oil in the gear box 3, cooling the gas inside the water jacket 1, and cooling the oil in the bearing box 2. And heat exchange is performed in the cooling chamber 1121 in a countercurrent manner, so as to quickly reduce the temperature on the side of the exhaust port 31, maximize the cooling efficiency, and effectively improve the cooling effect.

[0067] In some other embodiments, due to different application conditions of the dry vacuum pump 100 and special rotor structure design, the middle of the housing 11 may be at high temperature during operation, so it is necessary to adopt a countercurrent cooling method in the middle of the housing 11. In this case, the operator can pass the coolant through the cooling port 4 on the side of the bearing box 2, and after cooling the inner oil of the bearing box 2, Figure 7 The flow hole 17 shown in FIG. 1 flows into the water channel baffle 16 near the side of the bearing housing 2. Similarly, since the water channel baffle 16 separates the side of the cooling chamber 1121 near the first opening 1131, the coolant can only flow into the cooling chamber 1121 from the bottom and fill the first cooling chamber 1121 near the bearing housing 2. Fig. 9 By closing the sluice gate 142 at the first opening 1131 between the first cooling chamber 1121 and the middle cooling chamber 1121 (i.e., the end close to the air inlet 15), and opening the sluice gate 142 at the second opening 1141, the coolant can only flow from one side of the second opening 1141 into the second cooling chamber 1121 in the middle, and fill the second cooling chamber 1121 from bottom to top. Similarly, by opening the water gate 142 at the first opening 1131 between the second cooling chamber 1121 and the cooling chamber 1121 near the gear box 3 (i.e., the end away from the air inlet 15), and closing the water gate 142 at the second opening 1141, the coolant can only flow into the cooling chamber 1121 near the gear box 3 through the water gate 142 on the side of the first opening 1131 after filling the second cooling chamber 1121, and fill the cooling chamber 1121 from bottom to top, and finally fill the waterway baffle 16 near the gear box 3, and then flow out from the cooling chamber 1121. Figure 8The oil flows into the gear box 3 through the flow hole 17 shown, thereby cooling the oil in the gear box 3 .

[0068] Of course, during the cooling process, the coolant can also be introduced from the cooling port 4 on one side of the gear box 3 to cool the gear box 3, the water jacket 1 and the bearing box 2 respectively and then flow out from the cooling port 4 on the side of the bearing box 2.

[0069] In another embodiment, the water gates 142 at all positions can be opened so that the coolant can completely fill the liquid flow channel 112 in a downstream or upstream manner, and then a variable frequency water pump can be installed to control the water volume and water pressure in real time. Therefore, this application does not limit this.

[0070] It can be seen that the water jacket 1 disclosed in the present application only needs to coordinate the cooling port 4 and the water gate 142, and by changing the opening and closing of each water gate 142, the flow path of the coolant in the liquid flow channel 112 can be changed to achieve cooling under various working conditions and effectively ensure the cooling effect. This makes its application range very wide and the cooling effect obvious.

[0071] In some embodiments, the radial rib 121 includes a mounting groove 1212 arranged along the second direction Y. The water gate 142 includes a valve body 1421 arranged in the mounting groove 1212. During the operation of the dry vacuum pump 100, the operator controls the opening or closing of the water gate 142 by pulling out or inserting the valve body 1421.

[0072] In an alternative embodiment, in combination Figures 8 to 10 As shown, the radial rib 121 includes a first through hole 1211 arranged along the first axis X. The first through hole 1211 is connected to the mounting groove 1212. The first through hole 1211 is connected to the adjacent cooling chamber 1121. The valve body 1421 includes a second through hole 1421a that penetrates the valve body 1421. The valve body 1421 can rotate in the mounting groove 1212 so that the first through hole 1211 and the second through hole 1421a are connected or staggered.

[0073] The water jacket 1 disclosed in the present application is arranged by the coordination of the valve body 1421 and the radial ribs 121, so that during the operation of the dry vacuum pump 100, the operator can more conveniently control the opening and closing of the water gate 142 at each position by rotating the valve body 1421. In addition, the flow rate of the coolant can also be controlled by the rotation angle of the valve body 1421. It can be seen that the structural arrangement of the water gate 142 only needs to be installed on the basis of the structure of the existing water jacket 1, and there is no need to change the original structure of the water jacket 1. It has a simple structure, is easy to produce, and has a simple operation process, which makes it widely applicable.

[0074] The specific embodiments described herein are merely examples of the spirit of the present application. A person skilled in the art of the present application may make various modifications, supplements, or replace the described specific embodiments with similar methods, but they will not deviate from the spirit of the present application or exceed the scope defined by the attached claims.

[0075] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A water jacket, applied to a dry vacuum pump, characterized in that: include: A housing, comprising a receiving cavity and a liquid flow channel arranged inside the housing; the receiving cavity extends along a first axis and is used to receive a rotor of the dry vacuum pump; the liquid flow channel is arranged inside the housing around the first axis; A reinforcing rib is disposed in the liquid flow channel and divides the liquid flow channel into a plurality of cooling chambers; A water hole, arranged on the outer surface of the shell and connected to the liquid flow channel; as well as A water diversion structure is arranged on the reinforcing rib; adjacent cooling chambers can be connected through the water diversion structure.

2. The water jacket according to claim 1, characterized in that: The reinforcing ribs include a plurality of radial ribs; the plurality of radial ribs are distributed at intervals along the first axis to divide the liquid flow channel into a plurality of cooling chambers along the first axis.

3. The water jacket according to claim 2, characterized in that: The shell includes a first surface, a second surface, a first opening arranged on the first surface, and a second opening arranged on the second surface; the first surface and the second surface are arranged opposite to each other in a second direction; the first opening and the second opening are respectively connected to the liquid flow channel; and the second direction is perpendicular to the first axis.

4. The water jacket according to claim 3, characterized in that: The reinforcing ribs include axial ribs parallel to the first axis; the axial ribs are arranged close to the first opening and divide the cooling chamber into a first sub-chamber and a second sub-chamber; wherein the water diversion structure is arranged as a water diversion groove; the water diversion groove is arranged on the radial ribs.

5. The water jacket according to claim 4, characterized in that: The radial ribs include a first radial rib and a second radial rib; the water diversion groove includes a first water diversion groove arranged on the first radial rib and a second water diversion groove arranged on the second radial rib; the first water diversion groove is located in the first sub-chamber; and the second water diversion groove is located in the second sub-chamber.

6. The water jacket according to claim 3, characterized in that: The water diversion structure is configured as a sluice gate, and the sluice gate is used to connect or block the adjacent cooling chambers.

7. The water jacket according to claim 6, characterized in that: The radial rib includes a first through hole arranged along the first axis and a mounting groove arranged along the second direction; the first through hole is connected to the mounting groove; the first through hole is connected to the adjacent cooling chamber; the sluice includes a valve body arranged in the mounting groove; the valve body includes a second through hole penetrating the valve body; the valve body can rotate in the mounting groove so that the first through hole and the second through hole are connected or staggered.

8. The water jacket according to claim 6 or 7, characterized in that: The water gate is arranged on the radial ribs at the first opening and the second opening.

9. A dry vacuum pump, characterized in that: It comprises a bearing box, a gear box, a rotor and a water jacket as described in any one of claims 1 to 8; the rotor is arranged in the accommodating cavity; the bearing box and the gear box are respectively installed at two ends of the water jacket along the first axis; the two ends of the rotor are respectively connected to the bearing box and the gear box.

10. The dry vacuum pump according to claim 9, characterized in that The water jacket comprises a circulation hole; the circulation hole is arranged on the surface of the water jacket facing the gear box and the surface facing the bearing box; the gear box comprises a gear cooling cavity; the bearing box comprises a bearing cooling cavity; the gear cooling cavity and the bearing cooling cavity are respectively connected to the liquid flow channel through the circulation hole; the dry vacuum pump also comprises a cooling port; Wherein, the cooling port is arranged in the gear box and connects the gear cooling cavity with the outside world; and / or, the cooling port is arranged in the bearing box and connects the bearing cooling cavity with the outside world.

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