CN118273955A - Water jacket and dry vacuum pump - Google Patents

Abstract

The application relates to a water jacket and a dry vacuum pump, wherein the water jacket comprises: casing, strengthening rib, limbers and diversion structure. The housing includes a receiving cavity and a liquid flow passage disposed inside the housing. The reinforcing ribs are arranged in the liquid flow channel and divide the liquid flow channel into a plurality of cooling chambers. The water through hole is arranged on the outer surface of the shell and communicated with the liquid flow passage. The water diversion structure is arranged on the reinforcing rib. Adjacent cooling chambers can communicate through the water diversion structure. In the cooling process of the dry vacuum pump, the circulation path of the cooling liquid in the water jacket is limited by the reinforcing ribs and the water diversion structure, so that the requirements of the flow direction of the cooling liquid under different working conditions are met, the application of the vacuum pump with various 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

Water jacket and dry vacuum pump

Technical Field

The application relates to the field of vacuum pumps, in particular to a water jacket and a dry vacuum pump.

Background

The dry vacuum pump is an air extraction device which uses a pair of screws to perform suction and exhaust actions generated by synchronous high-speed reverse rotation in a pump housing. The dry screw pump can pump out gas containing a large amount of water vapor and a small amount of dust, has higher extreme vacuum and lower power consumption, and has the advantages of energy conservation, maintenance free and the like. The vacuum degree is extremely high, the vacuum degree is adaptable to severe working conditions, the vacuum degree has the capability of extracting the gas containing the particulates, is particularly suitable for clean environment, is easy to carry out corrosion prevention treatment, and is particularly suitable for the fields of electronics, chemical industry, biological medicine, metal processing, food processing and the like.

At present, the temperature control inside the water jacket of the vacuum pump housing is a difficult point. Because the dry vacuum pump is used under different application working conditions (photovoltaic, lithium battery, drying, lamination, hydrocarbon cleaning and the like), the thermal expansion of internal gas is inconsistent due to different temperature of the sucked medium. In addition, the rotor molded lines of the vacuum pump designed by the dry screw are inconsistent with the gas thermal expansion of each section of internal gas compression change (such as equidistant constant diameter, constant diameter variable pitch, variable diameter variable pitch, middle compression, end face compression, three-section compression and the like). Many cylinder liners of dry vacuum pumps, roots vacuum pumps and even many internal combustion engines (such as diesel engines and engines) are subjected to temperature control by directly embedding the cylinder liners into a water jacket shell for cooling.

Disclosure of Invention

The application provides a water jacket and a dry vacuum pump, which are used for solving part or all of the defects in the related art.

The application provides a water jacket, which is applied to a dry vacuum pump and comprises the following components:

The shell comprises a containing cavity and a liquid flow channel arranged in the shell. The receiving chamber extends along a first axis for receiving a rotor of the dry vacuum pump. The liquid flow passage is disposed inside the housing about the first axis.

And the reinforcing ribs are arranged in the liquid flow channel and divide the liquid flow channel into a plurality of cooling chambers.

The water through hole is arranged on the outer surface of the shell and communicated with the liquid flow passage.

And the water diversion structure is arranged on the reinforcing rib. Adjacent cooling chambers can communicate through the water diversion structure.

Optionally, the reinforcing ribs comprise a plurality of radial ribs. A plurality of the radial ribs are spaced apart along the first axis to divide the liquid flow passage into a plurality of cooling chambers along the first axis.

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 oppositely arranged in a second direction. The first opening and the second opening are respectively communicated with the liquid flow channel. The second direction is perpendicular to the first axis.

Optionally, the reinforcing ribs comprise axial ribs parallel to the first axis. The axial rib is disposed adjacent to the first opening and divides the cooling chamber into a first subchamber and a second subchamber. Wherein the water diversion structure is arranged as a water diversion groove. The water diversion grooves are formed in the radial ribs.

Optionally, the radial ribs include a first radial rib and a second radial rib. The water diversion grooves comprise first water diversion grooves arranged on the first radial ribs and second water diversion grooves arranged on the second radial ribs. The first water diversion groove is positioned in the first subchamber. The second water diversion groove is positioned in the second subchamber.

Optionally, the water diversion structure is provided as a water gate, and the water gate is used for communicating or blocking the cooling chamber.

Optionally, the radial rib includes a first through hole disposed along the first axis and a mounting groove disposed along the second direction. The first through hole is communicated with the mounting groove. The first through holes are communicated with adjacent cooling chambers. The sluice includes a valve body disposed within the mounting slot. The valve body includes a second through hole extending through the valve body. The valve body can rotate in the mounting groove so that the first through hole and the second through hole are communicated or staggered.

Optionally, the sluice is arranged at the radial ribs at the first opening and the second opening.

The application also provides a dry vacuum pump which comprises a bearing box, a gear box, a rotor and the water jacket. The rotor is disposed within the receiving chamber. The bearing housing and the gear housing are mounted at both ends of the water jacket along a first axis, respectively. And two ends of the rotor are respectively connected with the bearing box and the gear box.

Optionally, the water jacket includes a flow bore. The flow holes are arranged on the surface of the water jacket facing the gear box and the surface facing the bearing box. The gearbox includes a gear cooling cavity. The bearing housing includes a bearing cooling cavity. The gear cooling cavity and the bearing cooling cavity are respectively communicated with the liquid flow channel through the circulation holes. The dry vacuum pump further includes a cooling port.

Wherein, the cooling port set up in the gear box and intercommunication gear cooling chamber and external world. And/or the cooling port is arranged in the bearing box and is communicated with the bearing cooling cavity and the outside.

The technical scheme provided by the embodiment of the application can comprise the following beneficial effects:

According to the embodiment, in the cooling process of the dry vacuum pump, the circulation path of the cooling liquid in the water jacket is limited by the reinforcing ribs and the water diversion structure, so that the requirements of different working conditions on the flow direction of the cooling liquid are met, the application of the vacuum pump with various 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.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of the overall structure of a dry vacuum pump according to an embodiment of the application.

Fig. 2 is a cross-sectional view of a dry vacuum pump in accordance with an embodiment of the present application.

Fig. 3 is a schematic structural view of a water jacket according to an embodiment of the present application.

Fig. 4 is a schematic view showing the bottom structure of the water jacket according to an embodiment of the present application.

Fig. 5 is a cross-sectional view of a water jacket in accordance with an embodiment of the present application.

Fig. 6 is a cross-sectional view of a dry vacuum pump in accordance with another embodiment of the present application.

Fig. 7 is a schematic view of a water jacket according to another embodiment of the present application.

Fig. 8 is a schematic view of the bottom structure of a water jacket according to another embodiment of the present application.

Fig. 9 is a cross-sectional view of a water jacket in accordance with another embodiment of the present application.

Fig. 10 is a schematic view of a valve body according to another embodiment of the present application.

Reference numerals illustrate:

The dry vacuum pump 100, the water jacket 1, the housing 11, the accommodation chamber 111, the liquid flow passage 112, the cooling chamber 1121, the first subchamber 1121a, the second subchamber 1121b, the first surface 113, the first opening 1131, the second surface 114, the second opening 1141, the reinforcing rib 12, the radial rib 121, the first radial rib 121a, the second radial rib 121b, the first through hole 1211, the mounting groove 1212, the axial rib 122, the water passage hole 13, the water diversion structure 14, the water diversion groove 141, the water gate 142, the valve body 1421, the second through hole 1421a, the air inlet 15, the water passage partition 16, the flow passage hole 17, the bearing housing 2, the gear box 3, the air outlet 31, the gear cooling chamber 32, the cooling port 4, the first axis X, the second direction Y.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The manner described in the following exemplary embodiments does not represent all manners consistent with the present application. Rather, they are merely examples of apparatus consistent with aspects of the application as detailed in the accompanying claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Also, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one, and the terms "a" and "an" are used individually. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper" and the like are merely for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

As shown in fig. 1 to 10, the present application discloses a dry vacuum pump 100 including a water jacket 1, a bearing housing 2, a gear box 3, and a rotor (not shown). The water jacket 1 includes a housing 11. The housing 11 comprises a receiving cavity 111 extending along a first axis X. The accommodation chamber 111 accommodates the rotor. The two ends of the rotor are respectively connected with the bearing box 2 and the gear box 3 so as to realize the transmission input and the transmission output of the rotor. The surface of the water jacket 1 is also provided with an air inlet 15. The air inlet 15 communicates with the housing chamber 111 for injecting air into the pump body.

During actual operation of the dry vacuum pump 100, air sucked from the air inlet 15 is compressed by the pump body, resulting in a temperature rise in the accommodating chamber 111. At the same time, the lubricating oil filled inside the bearing housing 2 and the gear housing 3 is also compressed and warmed up during operation. The temperature rise in the dry vacuum pump 100 may cause a decrease in the working efficiency, a structural damage, and the like.

Therefore, a cooling system is required to cool the inside of the dry vacuum pump 100. In the disclosed embodiment of the application, the water jacket 1 further comprises reinforcing ribs 12, water through holes 13 and water diverting structures 14. The housing 11 is provided with a liquid flow passage 112 inside. The rib 12 is provided in the liquid flow passage 112 and divides the liquid flow passage 112 into a plurality of cooling chambers 1121. The water diverting structure 14 is disposed on the reinforcing rib 12. Adjacent cooling chambers 1121 can communicate through the water diversion structure 14. The liquid flow passage 112 is provided inside the housing 11 around the first axis X. The water passage hole 13 is provided in the outer surface of the housing 11 and communicates with the liquid flow passage 112. Therefore, the external cooling liquid can enter the liquid flow passage 112 through the water through hole 13 to cool the gas in the accommodating cavity 111, thereby ensuring the normal operation of the dry vacuum pump 100.

The provision of the ribs 12 divides the internal liquid flow passage 112 into a plurality of cooling chambers 1121. Meanwhile, the water diversion structure 14 provided at the reinforcing rib 12 communicates the respective cooling chambers 1121. In practical use, for example, when the cooling liquid flows into the liquid flow channel 112 from the water through hole 13, the cooling liquid fills the first cooling chamber 1121 due to the blocking of the reinforcing ribs 12, and cools the first cooling chamber 1221; then flows into the next cooling chamber 1121 through the water diversion structure 14 on the reinforcing rib 12, and then cools the next cooling chamber 1121. By the arrangement mode, the circulation path of the cooling liquid in the water jacket 1 is limited by the reinforcing ribs 12 and the water diversion structure 14 in the cooling process of the dry vacuum pump 100, so that the requirements of different working conditions on the flow direction of the cooling liquid are met, the application of the dry vacuum pump 100 with various schemes and structures is met, and the application range is wide; and the inside of the water jacket 1 is also enabled to form layered, staged and regular cooling paths, so that the heat exchange efficiency during cooling is effectively enhanced, and the cooling effect is further improved. In addition, the water jacket 1 has a simple structure, the flow path of the internal liquid is smooth, and the casting mold of the structure is simple and convenient. The arrangement of the reinforcing ribs 12 also effectively improves the structural strength of the water jacket 1 and ensures the stability and safety of the water jacket.

It should be understood that the number of water through holes 13 may be only one, i.e. the liquid injection cooling and the liquid discharge are performed through only one water through hole 13. In other embodiments, the number of the water through holes 13 may be two, and one water through hole is used for injecting liquid, and the other water through hole is used for discharging liquid and exhausting air, so that the liquid injection efficiency of the liquid flow channel 112 is improved, the flowing cooling of the accommodating cavity 111 is realized, and the cooling efficiency is improved. Indeed, the number of water through holes 13 may be three, four or even more, and the application is not limited thereto.

In embodiments in which the number of water passage holes 13 includes two or more, the water jacket 1 may further be provided with a temperature sensor (not shown) at part or all of the water passage holes 13. The temperature sensor can detect the temperature of the cooling liquid at the water through hole 13, so that an operator can judge the heat exchange effect in the water jacket 1 through the temperature difference between the liquid inlet and the liquid outlet. According to the heat exchange effect, an operator can control the water pressure and the water quantity of the cooling liquid inlet and outlet, thereby adjusting the heat exchange effect. For example, if the temperature difference between the liquid inlet and the liquid outlet is large, it is proved that the internal temperature of the water jacket 1 is high, and at this time, an operator can adjust the heat exchange effect by increasing the water amount at the liquid inlet or increasing the water pressure.

As shown in fig. 2, the bearing housing 2 and the gear case 3 are mounted at both ends of the water jacket 1 along the first axis X, respectively. In some embodiments, the dry vacuum pump 100 cools the rotor only through the water jacket 1. In other embodiments, the gearbox 3 includes a gear cooling cavity 32. The bearing housing 2 comprises a bearing cooling chamber (not shown). The water jacket 1 includes a flow hole 17. The flow hole 17 is provided on the surface of the water jacket 1 facing the gear case 3 and the surface facing the bearing housing 2. The gear cooling chamber 32 and the bearing cooling chamber communicate with the liquid flow passage 112 through the flow holes 17, respectively. In this way, the coolant entering the liquid flow passage 112 through the water passage hole 13 can also enter the gear cooling chamber 32 and the bearing cooling chamber through the water passage hole 17.

To further increase the cooling efficiency, in some embodiments, the dry vacuum pump 100 further comprises a cooling port 4. Wherein the cooling port 4 is provided in the gear case 3 and communicates with the gear cooling chamber 32 and the outside. The cooling port 4 is also provided in the bearing housing 2 and communicates the bearing cooling chamber with the outside. Thus, the cooling liquid can be selectively introduced into the liquid flow passage 112 through the cooling port 4 provided in the gear housing 3, the cooling port 4 provided in the bearing housing 2, or the water passage hole 13 of the water jacket 1 to cool the dry vacuum pump 100.

The dry vacuum pump 100 disclosed in the present application sequentially connects the bearing housing 2, the water jacket 1 and the cooling fluid flow path of the gear case 3 by providing the cooling port 4 and the flow hole 17. When the dry vacuum pump 100 needs to be cooled, for example, normal air is sucked into the air inlet 15 of the dry pump, the air is compressed by the dry pump, and a high temperature is generated at the air outlet 31, so that cooling liquid can be introduced into the cooling port 4 at the side of the bearing box 2 to cool the oil in the bearing box 2; then flows into the water jacket 1 through the circulation hole 17 communicated with the bearing box 2 on the water jacket 1 to cool the accommodating cavity 111; then the oil flows into the gear box 3 through a circulation hole 17 communicated with the gear box 3 on the water jacket 1, and the oil in the gear box 3 is cooled; finally, the air flows out from the cooling port 4 on the side of the gear case 3, and the internal cooling of the dry vacuum pump 100 is completed.

In another embodiment, the hot gas is pumped by the dry pump, the compressed exhaust gas passing through the dry pump reaches a very high temperature, which leads to a rapid temperature rise at the exhaust port 31, and then reverse cooling is needed to ensure that the temperature difference between the cooling liquid and the hot gas at each position inside the pump body is maximum, so that a better heat exchange effect and cooling effect are achieved. Therefore, the cooling liquid can be introduced from the cooling port 4 on the side of the gear case 3 to cool the oil in the gear case 3; then, the water flows into the water jacket 1 and the bearing housing 2 in this order through the flow holes 17, and is cooled, and finally flows out from the cooling ports 4 in the bearing housing 2. This way, the position of the exhaust port 31 having the highest temperature can be cooled rapidly.

Of course, different rotor designs result in inconsistent internal temperature field distributions due to manufacturing process variations. When the temperature of the position where the target (not shown in the figure) appears is high, the cooling liquid can be introduced from the water through holes 13 on the water jacket 1, then flows into the bearing box 2 and the gear box 3 through the through holes 17 at the two ends of the water jacket 1, and finally flows out from the cooling ports 4 of the bearing box 2 and the gear box 3, respectively. Thus, a flow path through which the coolant flows in from the middle and flows out from both ends is realized, and the target position having the highest temperature is rapidly cooled.

Therefore, through the structure, the water jacket 1 can be internally provided with a plurality of combined flow fields for cooling, so that the cooling effect is better. The application does not limit the circulation mode of the cooling liquid.

The location of the cooling port 4 can be set by those skilled in the art according to the cooling requirements of the dry vacuum pump 100. The cooling port 4 may be provided only to the bearing housing 2 or only to the gear case 3.

In other embodiments, in order to more intelligently control the flow of the cooling liquid, the dry vacuum pump 100 may add a temperature sensor at each cooling port 4, and provide a variable frequency water pump electrically connected to the temperature sensor, so that the dry vacuum pump 100 transmits an electric signal to the variable frequency water pump by receiving the temperature feedback of the temperature sensor, and controls the amount of water, for example, by the variable frequency water pump, thereby realizing the automation of the cooling process of the dry vacuum pump 100 and effectively reducing the working intensity of an operator.

The specific structure of the water jacket 1 will be described below. The various embodiments of the application may be implemented in combination with one another without conflict.

In some embodiments, the number of radial ribs 121 may be one, and one radial rib 121 divides the liquid flow passage 112 into two cooling chambers 1121. In an alternative embodiment, as shown in fig. 3 and 4, the reinforcing bars 12 include a plurality of radial bars 121. The plurality of radial ribs 121 are spaced apart along the first axis X to divide the liquid flow passage 112 into a plurality of cooling chambers 1121 along the first axis X.

In the water jacket 1, the radial ribs 121 divide the liquid flow passage 112 into a plurality of cooling chambers 1121. During the cooling process of the water jacket 1, the cooling liquid injected into the liquid flow passage 112 through the flow holes 17 needs to be filled with the first cooling chamber 1121 before flowing into the next chamber from the water diversion structure 14 due to the blocking of the radial ribs 121. The arrangement is such that a set of hierarchical cooling modes is formed in the water jacket 1. Therefore, the positions of the radial ribs 121 and the water diversion structure 14 are adjusted, and each portion of the water jacket 1 can be cooled in a targeted manner. The number of radial ribs 121 increases as does the number of cooling chambers 1121. The liquid flow channel 112 is divided into more units, which is beneficial to further improving the filling effect of the cooling liquid on the liquid flow channel 112, and further improving the cooling effect and the heat exchange effect.

Taking an embodiment in which 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 flows into the cooling chamber 1121 near the air inlet 15 from the flowing hole 17, and after the cooling liquid is filled into the chamber, the cooling liquid can flow into the next chamber, namely, the cooling chamber 1121 arranged in the middle through the water diversion structure 14 on the radial rib 121. Similarly, when the intermediate cooling chamber 1121 is filled, the cooling liquid flows into the cooling chamber 1121 away from the air intake port 15 through the water diversion structure 14. Finally, the cooling liquid flows out of the circulation holes 17 in fig. 4, so that the water jacket 1 is cooled in a layered, stepwise and regular manner, the situation that the cooling liquid flows out of the circulation holes 17 at the other end after flowing in from the circulation holes 17 and is not sufficiently cooled is effectively avoided, the cooling efficiency of the water jacket 1 is ensured, and the cooling effect of the dry vacuum pump 100 is further improved.

In the embodiment shown in fig. 3 to 5, the housing 11 includes a first surface 113, a second surface 114, a first opening 1131 provided on the first surface 113, and a second opening 1141 provided 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 communicate with the liquid flow passage 112, respectively. 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 an operator to more intuitively observe the internal structure of the liquid flow channel 112, so as to perform operations such as cleaning, maintenance, and processing on the inside of the liquid flow channel 112.

In an alternative embodiment, as shown in FIG. 3, the stiffener 12 includes an axial rib 122 parallel to the first axis X. The axial rib 122 is disposed adjacent to the first opening 1131 and separates the cooling chamber 1121 into a first subchamber 1121a and a second subchamber 1121b. Wherein the water diverting structure 14 is provided as a water diverting groove 141. The water guide grooves 141 are provided in the radial rib 121.

In combination with the above, when the cooling liquid flows in from the flow hole 17 shown in fig. 3, it is injected into the second sub-chamber 1121b of the cooling chamber 1121 near the air inlet 15. As can be seen from fig. 4, the first sub-chamber 1121a and the bottom of the second sub-chamber 1121b of each cooling chamber 1121 are both in communication, and therefore, the cooling liquid flows into the first sub-chamber 1121a of the same cooling chamber 1121 from the bottom in the second sub-chamber 1121b, so that the cooling chamber 1121 is filled entirely. Subsequently, the cooling liquid of the cooling chamber 1121 enters the next cooling chamber 1121 from the water guide groove 141. Such a structural arrangement effectively improves the filling effect of the cooling liquid to the cooling chamber 1121, thereby ensuring the cooling efficiency.

While in an alternative embodiment, the radial ribs 121 include a first radial rib 121a and a second radial rib 121b that divide the liquid flow passage 112 into three cooling chambers 1121. The water guide groove 141 includes a first water guide groove provided in the first radial rib 121a and a second water guide groove provided in the second radial rib 121b. The first water groove is located in the first sub-chamber 121a. The second water trough is located in the second subchamber 121b. Taking the embodiment shown in fig. 3 as an example, the cooling chamber 1121 near the air intake 15 is hereinafter referred to as a left-side cooling chamber 1121, the cooling chamber 1121 adjacent to the left-side cooling chamber 1121 is referred to as an intermediate cooling chamber 1121, and the cooling chamber 1121 far from the air intake 15 is referred to as a right-side cooling chamber 1121, from the perspective of fig. 3. It should be understood that the direction of flow of the cooling fluid is not limited to the left, middle, and right orientation descriptions below.

After the cooling liquid enters the second sub-chamber 1121b of the left cooling chamber 1121 from the through hole 17, the first sub-chamber 1121a is filled up through the bottom, and then enters the first sub-chamber 1121a of the intermediate cooling chamber 1121 through the first water-guiding groove, and then the second sub-chamber 1121b of the intermediate cooling chamber 1121 is filled up through the bottom. Since the second water diversion groove is provided at the position where the second radial rib 121b is located in the second sub-chamber 121b, the cooling liquid 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 the first sub-chamber 1121a via the bottom. Observing along the negative direction of the first axis X of the coordinate axes shown in fig. 3, the cooling liquid flows in the counterclockwise direction, the clockwise direction and the counterclockwise direction in turn, so that the water jacket 1 is cooled in a layered, stepwise and regular manner, the cooling efficiency of the water jacket 1 is ensured, and the cooling effect of the dry vacuum pump 100 is further improved.

Of course, in other embodiments, depending on the actual use requirements, the location of the water channel 141 on the radial rib 121 may be changed by machining, i.e. the communication location of the different cooling chambers 1121. For example: the water grooves 141 on the first radial rib 121a may be opened to communicate the first sub-chamber 1121a of the first cooling chamber 1121 with the second sub-chamber 1121b of the second cooling chamber 1121. Meanwhile, the water guide grooves 141 on the second radial rib 121b are opened to communicate the first sub-chamber 1121a of the second cooling chamber 1121 with the second sub-chamber 1121b of the last cooling chamber 1121. As a result, the cooling liquid flows in a counterclockwise direction, i.e., a reverse spiral flow, in each cooling chamber 1121, as viewed in the negative direction of the first axis X of the coordinate axes shown in fig. 3.

Similarly, by changing the positions of the water-guiding grooves 141 and the circulation holes 17, the cooling liquid can also be caused to flow in the clockwise direction, i.e., the positive spiral flow, in each of the cooling chambers 1121. Or as above, both clockwise and counterclockwise mixed helical flow. Therefore, the dry vacuum pump 100 disclosed in the present application can be applied to cooling in different working conditions by changing the positions of the convection hole 17 and the water guide groove 141, thereby coping with the cooling requirements in various cases and ensuring the cooling effect. This makes the setting of its structure flexible and changeable, the range of application very wide. Therefore, the present application is not limited to the arrangement of the structures such as the reinforcing ribs 12, the flow holes 17, the water diversion grooves 141, and the like.

It should be noted that the radial ribs 121 of the embodiment shown in fig. 3 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 is only two, nor that the structure described in this embodiment is applicable only when the number of radial ribs 121 is two. In practice, the number of radial ribs 121 may include more, such as three, four, etc. When the number of radial ribs 121 is greater than two, then two adjacent radial ribs 121 are the first radial rib 121a and the second radial rib 121b, respectively.

In an alternative embodiment, as shown in fig. 6-10, the water diversion structure 14 is provided as a sluice 142. The water gate 142 is used to communicate or block adjacent cooling chambers 1121 and is disposed in the radial rib 121 at the first and second openings 1131, 1141. By changing the opening and closing of the water gate 142 at different positions, the flow path of the cooling liquid in the liquid flow passage 112 can be changed easily. For example: bottom-up flow in the first cooling chamber 1121, top-down flow in the second cooling chamber 1121, bottom-up flow in the last chamber, etc. The arrangement ensures that the water jacket 1 is cooled in a layered, stepwise and regular manner, effectively avoids the situation that the cooling liquid flows into the circulation holes 17 and is not sufficiently cooled, namely flows out of the circulation holes 17 at the other end, ensures the cooling efficiency of the water jacket 1, further improves the cooling effect of the dry vacuum pump 100, and simultaneously expands the application range of the water jacket 1.

As can be seen in fig. 6, the water jacket 1 further comprises a water channel partition 16. A waterway partition 16 is provided in the cooling chamber 1121 and communicates with the bottom of the cooling chamber 1121. In practical applications, such as when the dry pump pumps normal air, the air temperature in the water jacket 1 does not rise to a particularly high level and no rapid cooling is required. Therefore, the cooling is only required to be performed in the order of cooling the oil in the bearing housing 2, cooling the gas in the water jacket 1, and cooling the oil in the gear box 3. Therefore, the cooling liquid is introduced through the cooling port 4 on the side of the bearing housing 2, and flows into the water passage partition 16 through the flow holes 17 shown in fig. 7, and the water passage partition 16 communicates with the bottom of the cooling chamber 1121, so that the first cooling chamber 1121 is filled with the cooling liquid from bottom to top by adjusting the opening and closing of the respective water gates 142. And then flows into the intermediate cooling chamber 1121 through a water gate 142 provided at the top of the cooling chamber 1121. Closing the water gate 142 at the top of the intermediate cooling chamber 1121 and opening the water gate 142 at the bottom will allow the cooling liquid to flow directly through the bottom into the last cooling chamber 1121 and fill up the water channel separator 16 in communication with the last cooling chamber 1121 and finally into the gearbox 3 through the flow holes 17 shown in fig. 8. The temperature of the pump body can be controlled slowly in this way, and mild cooling is achieved.

Similarly, when high temperature gas is sucked, the compressed temperature exhaust gas passing through the dry pump reaches a very high level, and the countercurrent heat exchange effect is better than that of the concurrent flow, so that the cooling liquid needs to be rapidly cooled in a countercurrent manner, the cooling liquid is preferentially introduced into the cooling chamber 1121 at the side of the exhaust port 31, and the countercurrent heat exchange is required. Therefore, by adjusting the opening and closing of the water gate 142, the cooling liquid fills the cooling chamber 1121 near the air outlet 31 from bottom to top, flows through the middle cooling chamber 1121 from top to bottom, and fills the cooling chamber 1121 near the air inlet 15 from bottom to top. Thereby cooling the oil in the gear case 3, the gas in the cooling water jacket 1, and the oil in the bearing housing 2 in this order. And heat exchange is performed in the cooling chamber 1121 in a counter-current manner, thereby rapidly reducing the temperature of the exhaust port 31 side, maximizing cooling efficiency, and effectively improving cooling effect.

In other embodiments, the application of the dry vacuum pump 100 is different, and the rotor structure is specially designed, so that the middle of the housing 11 is high in temperature during the working process, and therefore, a cooling mode of the middle of the housing 11 in a reverse flow mode is required. In this case, the operator may introduce the coolant into the cooling port 4 on the side of the bearing housing 2, cool the inner oil of the bearing housing 2, and then flow the coolant into the water passage partition 16 on the side of the bearing housing 2 through the flow hole 17 shown in fig. 7. Likewise, since the water channel partition 16 partitions the cooling chamber 1121 on the side close to the first opening 1131, the cooling liquid can only flow into the cooling chamber 1121 from the bottom and fill the first cooling chamber 1121 close to the bearing housing 2. Referring to fig. 9, by closing the water gate 142 at the first opening 1131 between the first cooling chamber 1121 and the intermediate cooling chamber 1121 (i.e., near the air inlet 15), the water gate 142 at the second opening 1141 is opened so that the cooling liquid can flow into the second cooling chamber 1121 at the middle only from the side of the second opening 1141 and fill the second cooling chamber 1121 from bottom to top. Similarly, by opening the water gate 142 between the second cooling chamber 1121 and the cooling chamber 1121 near the gear case 3 (i.e., at the end far from the air inlet 15) and located at the first opening 1131, the water gate 142 located at the second opening 1141 is closed, so that after the second cooling chamber 1121 is filled with the cooling liquid, the cooling liquid can only flow into the cooling chamber 1121 near the gear case 3 through the water gate 142 at the first opening 1131, fill the cooling chamber 1121 from bottom to top, and finally fill the water channel partition 16 near the gear case 3, and flow into the gear case 3 through the flow hole 17 shown in fig. 8, so as to cool the oil in the gear case 3.

Of course, in this cooling process, the cooling liquid may be introduced from the cooling port 4 on the side of the gear case 3, and the gear case 3, the water jacket 1, and the bearing housing 2 may be cooled, and then may be discharged from the cooling port 4 on the side of the bearing housing 2.

In another embodiment, the water gate 142 at each position can be opened, so that the cooling liquid can fully impregnate the liquid flow channel 112 in a downstream or countercurrent mode, and then the water quantity and the water pressure can be controlled in real time by adding a variable-frequency water pump. Accordingly, the application is not limited in this regard.

Therefore, the water jacket 1 disclosed by the application can change the flow path of the cooling liquid in the liquid flow channel 112 by changing the opening and closing of each water gate 142 only through the matching arrangement of the cooling port 4 and the water gate 142, thereby realizing the cooling under various working conditions and effectively ensuring the cooling effect. This makes its range of application very wide, the cooling effect obvious.

In some embodiments, radial ribs 121 include mounting slots 1212 disposed along second direction Y. The sluice 142 includes a valve body 1421 disposed within the mounting slot 1212. During operation of the dry vacuum pump 100, an operator controls the opening or closing of the floodgate 142 by pulling out or inserting the valve body 1421.

In an alternative embodiment, as shown in connection with fig. 8-10, radial rib 121 includes a first through hole 1211 disposed along a first axis X. The first through hole 1211 communicates with the mounting groove 1212. The first through holes 1211 communicate with adjacent cooling chambers 1121. The valve body 1421 includes a second through hole 1421a penetrating the valve body 1421. The valve body 1421 may rotate within the mounting slot 1212 to allow the first through-hole 1211 and the second through-hole 1421a to communicate or be staggered.

The water jacket 1 disclosed by the application is provided with the valve body 1421 and the radial ribs 121 in a matching way, so that an operator can control the opening and closing of the sluice 142 at each position more conveniently by rotating the valve body 1421 in the working process of the dry vacuum pump 100. The flow rate of the coolant may also be controlled by the rotation angle of the valve body 1421. Therefore, the structure of the sluice 142 is simply added based on the structure of the existing water jacket 1, the original structure of the water jacket 1 is not required to be changed, the structure is simple, the production is easy, and the operation process is simple and convenient, so that the application range is wide.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the application. Those skilled in the art may make various modifications, additions, or substitutions to the described embodiments without departing from the spirit of the application or exceeding the scope of the application as defined in the accompanying claims.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

Claims (10)

1. A water jacket for a dry vacuum pump, comprising:

The shell comprises a containing cavity and a liquid flow channel arranged in the shell; the accommodating cavity extends along a first axis and is used for accommodating a rotor of the dry vacuum pump; the liquid flow channel is arranged inside the shell around the first axis;

the reinforcing ribs are arranged in the liquid flow channel and divide the liquid flow channel into a plurality of cooling chambers;

The water through hole is arranged on the outer surface of the shell and is communicated with the liquid flow channel; and

The water diversion structure is arranged on the reinforcing rib; adjacent cooling chambers can communicate through the water diversion structure.

2. The water jacket of claim 1, wherein the reinforcing ribs comprise a plurality of radial ribs; a plurality of the radial ribs are spaced apart along the first axis to divide the liquid flow passage into a plurality of cooling chambers along the first axis.

3. The water jacket of claim 2, wherein the housing includes a first surface, a second surface, a first opening disposed in the first surface, and a second opening disposed in the second surface; the first surface and the second surface are oppositely arranged in a second direction; the first opening and the second opening are respectively communicated with the liquid flow channel; the second direction is perpendicular to the first axis.

4. A water jacket as claimed in claim 3, wherein the reinforcing bars include axial bars parallel to the first axis; the axial ribs are arranged close to the first opening and divide the cooling chamber into a first subchamber and a second subchamber; wherein the water diversion structure is arranged as a water diversion groove; the water diversion grooves are formed in the radial ribs.

5. A water jacket as recited in claim 4, wherein the radial ribs include a first radial rib and a second radial rib; the water diversion grooves comprise first water diversion grooves arranged on the first radial ribs and second water diversion grooves arranged on the second radial ribs; the first water diversion groove is positioned in the first subchamber; the second water diversion groove is positioned in the second subchamber.

6. A water jacket as claimed in claim 3, wherein the water diverting structure is provided as a sluice for communicating or blocking adjacent said cooling chambers.

7. The water jacket of claim 6, wherein the radial ribs include a first through hole disposed along the first axis and a mounting slot disposed along the second direction; the first through hole is communicated with the mounting groove; the first through holes are communicated with adjacent cooling chambers; the sluice comprises a valve body arranged in the mounting groove; the valve body comprises a second through hole penetrating through the valve body; the valve body can rotate in the mounting groove so that the first through hole and the second through hole are communicated or staggered.

8. A water jacket as claimed in claim 6 or 7, wherein the sluice is provided at the radial ribs at the first and second openings.

9. A dry vacuum pump comprising a bearing housing, a gear box, a rotor and a water jacket according to any one of claims 1 to 8; the rotor is arranged in the accommodating cavity; the bearing box and the gear box are respectively arranged at two ends of the water jacket along the first axis; and two ends of the rotor are respectively connected with the bearing box and the gear box.

10. The dry vacuum pump of claim 9, wherein the water jacket comprises a flow bore; the circulating hole is arranged on the surface of the water jacket facing the gear box and the surface facing the bearing box; the gearbox includes a gear cooling cavity; the bearing box comprises a bearing cooling cavity; the gear cooling cavity and the bearing cooling cavity are respectively communicated with the liquid flow channel through the circulation holes; the dry vacuum pump further comprises a cooling port;

The cooling port is arranged on the gear box and is communicated with the gear cooling cavity and the outside; and/or the cooling port is arranged in the bearing box and is communicated with the bearing cooling cavity and the outside.