Water-spraying self-adaptive oilless vacuum pump

Abstract

The water-spraying self-adaptive oilless vacuum pump comprises an air suction cavity (1), an air cylinder (2) and a vacuumizing assembly arranged in the air cylinder (2) in a matched mode, the vacuumizing assembly is used for vacuumizing, the air suction cavity (1) is provided with water spraying holes (5), the water spraying holes (5) are used for being communicated with a water source (6), and during vacuumizing, the air suction cavity (1) sucks water into the air suction cavity (1) through the water spraying holes (5); the suction amount is changed along with the vacuum degree of the suction cavity (1); therefore, cooling of the oil-free vacuum pump is automatically adjusted according to the working conditions, and in addition, the self-adaptive structure is simple and ingenious through the scheme.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum pumps, in particular to a water-spraying self-adaptive oil-free vacuum pump. Background Art

[0002] As an important general industrial equipment, oil-free screw vacuum pump is widely used in the fields of foam, paper tray, transportation, etc. Since the vacuum pump compression chamber is oil-free and has no cooling lubricant, the vacuum pump temperature is high, and parts are prone to high-temperature expansion, which eventually leads to vacuum components (such as screws) scraping the cylinder or seizing. The cooling of conventional oil-free cooling vacuum pumps is mainly low-temperature gas entering the vacuum pump to take away heat. Since the vacuum pump has a small air intake, especially when the vacuum becomes higher, its operating temperature increases with the vacuum degree, which can easily lead to high temperatures and cause failures.

[0003] At present, there are proposals to use water spray cooling for cooling. For example, a water spray type single screw vacuum pump disclosed in the authorization announcement number CN206668551U proposes that "the casing is provided with a main engine water spray hole, and the main engine water spray hole is connected to the internal cavity of the casing" and "the sprayed water can play the role of lubrication, cooling, noise reduction and sealing". Although the cooling effect of the sprayed water is improved, it is not disclosed where the water is sprayed from, nor how to automatically adjust the cooling of the oil-free vacuum pump according to the working conditions.

[0004] Therefore, a reliable and simple technical solution that can automatically adjust the cooling of the oil-free vacuum pump according to the working conditions can greatly improve the performance and stability of the main engine. The applicant proposes a water-spray adaptive oil-free vacuum pump that automatically adjusts the cooling of the oil-free vacuum pump according to the working conditions. In addition, the adaptive structure of this solution is simple and ingenious. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and propose a water-spraying adaptive oil-free vacuum pump, which automatically adjusts the cooling of the oil-free vacuum pump according to the working conditions. In addition, the adaptive structure of the scheme is simple and ingenious.

[0006] Compared with the prior art, the present invention proposes a water-spray adaptive oil-free vacuum pump, comprising an air suction chamber, a cylinder and a vacuum pumping component matched in the cylinder, the vacuum pumping component is used for vacuuming, the air suction chamber is provided with a water spray hole, and the water spray hole is used to connect with a water source. When vacuuming, the air suction chamber sucks water into the air suction chamber through the water spray hole, and the amount of water sucked in changes with the vacuum degree of the air suction chamber.

[0007] After adopting the above structure, compared with the prior art, the present invention has the following advantages:

[0008] The suction chamber draws water into the suction chamber through the water spray hole, and the amount of water sucked in varies with the vacuum degree of the suction chamber. Therefore, under different working conditions, the vacuum degree of the suction chamber is different, and the amount of water sucked in is also different, thus producing different cooling effects, thereby automatically adjusting the cooling of the vacuum pump according to the working conditions. In addition, the adaptive structure of this scheme is simple and ingenious.

[0009] As an improvement, the water spray hole is arranged on the inner wall surface of the cylinder located on one side of the suction chamber.

[0010] As an improvement, a flow channel is also included, and the flow channel is connected to the water source and the water spray hole respectively.

[0011] As an improvement, the water spray holes are distributed in the flow channel, and the water spray holes directly take water from the flow channel.

[0012] As an improvement, the flow channel includes a water inlet hole and a water outlet hole, and a water source is respectively connected to the water inlet hole and the water outlet hole to form a water circulation.

[0013] As an improvement, the flow channel is provided at least in the cylinder itself.

[0014] As an improvement, a flow channel is provided on the outer wall surface of the cylinder, and the flow channel is covered by a cover to form a water cavity.

[0015] As an improvement, a first flow channel and a second flow channel are respectively provided on two lateral side walls of the cylinder, and an air cavity is formed between the two side walls. The vacuum pumping component moves in the air cavity to perform vacuum pumping.

[0016] As an improvement, the first flow channel is provided with a water inlet hole, the second flow channel is provided with a water outlet hole, and a connecting water channel is provided between the first flow channel and the second flow channel. Water flows through the water inlet hole, the first flow channel, the connecting water channel, the second flow channel, and the water outlet hole in sequence. The connecting water channel adopts a pipeline or a flow channel arranged on the cylinder.

[0017] As an improvement, the communicating water channel is arranged in a transverse linear manner at the bottom of the cylinder.

[0018] As an improvement, the water inlet is located on the upper left side of the first flow channel, a water spray hole is arranged in the rear section of the first flow channel, and an inlet of a connecting water channel is arranged at the end, so that water enters the second flow channel through the connecting water channel, and the upper right corner of the second flow channel extends and goes back to the part where the air suction chamber of the cylinder is located. The rear section of the second flow channel is in the part where the air suction chamber of the cylinder is located, a water spray hole is arranged in the rear section of the second flow channel, and a water outlet hole is arranged at the end of the second flow channel.

[0019] As an improvement, a water outlet hole is set at the end of the second flow channel, and the water outlet hole can be directly connected to the water outlet pipe, or a water outlet cavity can be set at the bottom of the cylinder, and the water outlet cavity includes a cover, and a connecting outlet is set on the cover. The water outlet cavity can be integrally formed with an opening when manufacturing the cylinder, and then the opening is sealed with the cover.

[0020] As an improvement, a cooler is also included, which is arranged in the water cycle constructed by the water source and the flow channel to cool the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of a water-jet adaptive oil-free vacuum pump.

[0022] Figure 2 This is a three-dimensional schematic diagram of a water-jet adaptive oil-free vacuum pump without the cylinder.

[0023] Figure 3 It is a three-dimensional schematic diagram of a water-jet adaptive oil-free vacuum pump from the bottom perspective.

[0024] Figure 4 The present invention is a stereoscopic schematic diagram of a cylinder of a water-jet adaptive oil-free vacuum pump from one side perspective.

[0025] Figure 5 It is a stereoscopic schematic diagram of the other side of the cylinder of a water-jet adaptive oil-free vacuum pump.

[0026] Figure 6 The end view of the cylinder of a water-jet adaptive oil-free vacuum pump.

[0027] Figure 7 It is the AA section view.

[0028] Figure 8 It is a three-dimensional schematic diagram mainly showing the first flow channel.

[0029] Fig. 9 It is a three-dimensional schematic diagram mainly showing the second flow channel.

[0030] Fig.10 A schematic diagram of the cooling water circulation principle.

[0031] Explanation of the reference numerals: 1. suction chamber, 2. cylinder, 3. male rotor, 4. female rotor, 5. water spray hole, 6. water source, 7. water inlet hole, 8. water outlet hole, 9. cover, 10. first flow channel, 11. second flow channel, 12. connecting water channel, 13. cooler, 14. air inlet hole, 15. exhaust hole, 16. compression chamber, 17. water inlet pipe, 18. water outlet pipe, 19. outlet shaft, 20. opening, 21. cover, 22. connecting outlet. DETAILED DESCRIPTION

[0032] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0033] The present invention is further described in detail below:

[0034] For the convenience of description and understanding, the directional description is used for illustration only and does not constitute a limitation on the scope of protection of rights.

[0035] Figure 7 The arrows shown in the figure indicate the direction of vacuuming.

[0036] like Figures 1 to 10 As shown, the present disclosure proposes a water-spraying adaptive oil-free vacuum pump, comprising an air suction chamber 1, a cylinder 2 and a vacuum pumping component matched in the cylinder 2, the vacuum pumping component is used for vacuuming, the air suction chamber 1 is provided with a water spraying hole 5, and the water spraying hole 5 is used to connect with a water source 6. When vacuuming, the air suction chamber 1 sucks water into the air suction chamber 1 through the water spraying hole 5, and the amount of water sucked changes with the vacuum degree of the air suction chamber 1.

[0037] The air intake chamber 1 is provided with a water spray hole 5, which means that the water spray hole 5 can be set at any suitable position between the air intake pipe and the compression chamber 16, for example, set in the air intake pipe, the water spray hole 5 is located in the air intake pipe but the nozzle faces the air intake hole 14, the air intake hole 14, in front of the envelope of the cylinder 2, etc.

[0038] Water is just a synonym. Any suitable cooling liquid is applicable to the present disclosure. Of course, pure water that has been filtered is more suitable for the present disclosure in terms of reducing costs.

[0039] The water spray hole 5 can be set as a nozzle, or a hole can be set on the pump body of the vacuum pump, and the nozzle can be installed in the hole. After the suction chamber 1 exceeds a certain vacuum degree, the nozzle opens to inhale water under the action of the vacuum degree. The opening amplitude of the nozzle can be set to be related to the vacuum degree, so as to more finely adaptively adjust the flow rate; it can also be a constant opening, but the vacuum degree is different, resulting in different flow rates, thereby achieving the purpose of adaptively adjusting the water suction flow rate.

[0040] In addition to the nozzle, a perforated screw plug may be installed on the water spray hole 5, and the size of the hole on the screw plug can be adjusted according to the air volume of the host.

[0041] In addition to the nozzle, there can also be fine holes through which water is sucked in. The fine holes can be set on the pump body of the vacuum pump, that is, holes can be drilled directly on the pump body. Any part suitable for drilling holes can be considered to be provided with water spray holes 5. Drilling holes directly on the pump body is also conducive to improving integration.

[0042] It is more preferred to set up a nozzle, so that the vacuum degree at which it opens can be controlled more accurately, thereby better matching different models. In addition, after setting the nozzle, it is less likely to leak before the required vacuum degree is reached compared to directly processed fine holes.

[0043] The water source 6 can be directly connected to the water spray hole 5, or a flow channel can be set to connect the water source 6 and the water spray hole 5 respectively. Setting the flow channel is conducive to realizing more functions and simplifying production.

[0044] In this example, the water spray hole 5 is arranged on the inner wall surface of the cylinder 2 located on the side of the suction chamber 1, which is conducive to improving the integration, facilitating production and manufacturing, and reducing production costs.

[0045] For further integrated arrangement, the water spray holes 5 are distributed in the flow channel, and the water spray holes 5 directly take water from the flow channel. After such design, in the case of multiple water spray holes 5, it is convenient to arrange and connect the water spray holes 5.

[0046] In some embodiments, the flow channel includes a water inlet hole 7 and a water outlet hole 8, and the water source 6 is connected to the water inlet hole 7 and the water outlet hole 8 respectively, thereby forming a water circulation. After such a design, the flow channel will not be exhausted due to water absorption, and the continuous water circulation will fully guarantee the water supply to the water spray hole 5. In addition, the circulation prevents the temperature of the water in the flow channel from being too high. In addition, the circulating flow makes the water pressure in the flow channel easier to control, thereby reducing the influence of the vacuum degree on the water absorption of the nozzle, which is helpful for the purpose of adaptive control.

[0047] In the design of the circulation flow scheme, the water source 6 can be a water tank, and the water tank and the vacuum pump can be connected by a water inlet pipe 17 and a water outlet pipe 18.

[0048] In order to better control the water temperature, Fig.10 As shown, a cooler 13 is also included, which is arranged in the water cycle constructed by the water source 6 and the flow channel to cool the water. After such a design, the water temperature in the flow channel can be kept low during the continuous operation of the vacuum pump, so that the inhaled water can play a better role, which is conducive to improving the working performance of the vacuum pump. The cooler 13 can adopt the existing technology.

[0049] In this example, if Figure 4 , 5 As shown in , 8 and 9, at least the flow channel is provided in the cylinder 2 itself, and the water in the flow channel can also be used to cool the cylinder 2 itself. Thus, multiple goals are achieved at one stroke. In addition, the temperature of the cylinder 2 is lowered, which is conducive to improving the working performance of the vacuum pump.

[0050] In order to simplify production, Figure 2 ,3 As shown in Figure 4, a flow channel is provided on the outer wall surface of the cylinder 2, and the flow channel is covered by a cover 9 to form a water cavity, which can also be called a water tank.

[0051] In this example, if Figure 1 , 2 As shown in Figures 4, 5, 8 and 9, a first flow channel 10 and a second flow channel 11 are respectively provided on the two lateral walls of the cylinder 2, and an air cavity is formed between the two side walls. The vacuum pumping assembly moves in the air cavity to perform vacuum pumping. An air inlet 14 is provided on the upper side of the air cavity, and an exhaust hole 15 is provided on the lower side of the air cavity.

[0052] In this example, the vacuum pumping assembly is a twin-screw structure, specifically, it includes a male rotor 3 and a female rotor 4. The male rotor 3 is provided with an output shaft 19, and the output shaft 19 is used to connect to a power source, such as an electric motor. The male rotor 3 and the female rotor 4 cooperate with each other to form a process of pushing the gas to move from the suction hole, the suction chamber 1, the compression chamber 16, and the exhaust hole 15. The suction chamber 1 and the compression chamber 16 constitute the air chamber.

[0053] Since the first flow channel 10 and the second flow channel 11 are respectively provided on the two lateral side walls of the cylinder 2, a large area of ​​cooling is achieved for the cylinder 2. In this example, the first flow channel 10 and the second flow channel 11 are both labyrinth flow channels, thus having a better cooling effect.

[0054] In order to further improve the integration level, such as Figure 8 , 9 As shown, the first flow channel 10 is provided with a water inlet hole 7, the second flow channel 11 is provided with a water outlet hole 8, and a connecting water channel 12 is provided between the first flow channel 10 and the second flow channel 11. Water flows through the water inlet hole 7, the first flow channel 10, the connecting water channel 12, the second flow channel 11, and the water outlet hole 8 in sequence. The connecting water channel 12 adopts a pipeline or a flow channel arranged on the cylinder 2. In this example, the connecting water channel 12 adopts a flow channel arranged on the cylinder 2, which has a higher degree of integration.

[0055] In this example, if Figure 7 , 8 As shown in Figure 9, the communicating water channel 12 is arranged in a horizontal straight line at the bottom of the cylinder 2. After such a design, a shorter communicating path is provided. In addition, at the bottom, there is a larger space for arranging a communicating water channel 12 with a larger cross section.

[0056] In this example, if Figure 8 As shown, the water inlet 7 is located at the upper left side of the first flow channel 10, the water spray hole 5 is arranged at the rear section of the first flow channel 10, and the inlet of the connecting water channel 12 is arranged at the end, and water enters the second flow channel 11 through the connecting water channel 12, that is, Fig. 9As shown, in order to simplify the production, the connecting water channel 12 is arranged in a horizontal straight line at the bottom of the cylinder 2, so the outlet of the connecting water channel 12 will be located at the part where the suction chamber 1 of the cylinder 2 is located. At this time, in order to allow the second flow channel 11 to cool the cylinder 2, the second flow channel 11 is arranged to Fig. 9 The upper right corner shown extends and circles back to the part where the air intake chamber 1 of the cylinder 2 is located. At this time, the rear section of the second flow channel 11 is located at the part where the air intake chamber 1 of the cylinder 2 is located, and a water spray hole 5 can be set in the rear section of the second flow channel 11 to meet the position requirement of the water spray hole 5.

[0057] The end of the second flow channel 11 is provided with a water outlet 8, and the water outlet 8 can be directly connected to the water outlet pipe 18, or a water outlet cavity can be provided at the bottom of the cylinder 2, such as Figure 7 , 9 As shown, the water outlet chamber includes a cover 21, and a connecting outlet 22 is provided on the cover 21, and the connecting outlet 22 is used to connect the water outlet pipe 18. The above design is conducive to hiding the water outlet pipe 18. In addition, the water outlet chamber can be integrally formed with an opening 20 when manufacturing the cylinder 2, and then the cover 21 is used to seal the opening 20, thereby simplifying the production and reducing the production cost.

[0058] As can be seen from the above, the present disclosure opens a water spray hole 5 on the side of the cylinder 2. In this example, the specific position of the water spray hole 5 is in front of the envelope of the cylinder 2 and is located in the main engine suction chamber 1.

[0059] The number of the water spray holes 5 can be one or more. Figure 4 , 5 As shown in FIGS. 8 and 9 , each side wall is provided with six water spray holes 5 , which are formed by respectively penetrating the two lateral walls of the cylinder 2 .

[0060] The operating characteristics of the vacuum pump disclosed in the present invention are that the suction chamber 1 of the vacuum pump is at negative pressure, the water tanks on both sides are at normal pressure or slightly higher than normal pressure (for example, when there is water circulation), and there is a pressure difference between the water tank and the suction chamber 1. During operation, as the vacuum becomes higher, the exhaust temperature of the vacuum pump will also be higher. In this way, more cooling water is required. Since the pressure difference between the suction chamber 1 and the water tank also becomes larger, more water is sucked into the suction chamber 1 through the water spray hole 5, thereby adaptively improving the cooling efficiency.

[0061] During operation, as the vacuum degree increases, the heat generated by the vacuum pump increases, and the water spraying amount is automatically increased so that the vacuum pump can adjust the water spraying amount according to different vacuum degrees, thereby achieving adaptive cooling.

[0062] The cooling water sprayed into the suction cavity 1 of the present invention evaporates into the gas under the heat and is discharged from the vacuum pump along with the gas, thereby reducing the operating temperature of the vacuum pump.

[0063] When understanding the present invention, if necessary, the above structure can refer to other embodiments / appendices. Figure 1 And understand, no further elaboration here.

[0064] The above description is only an illustrative embodiment of the present invention, so all equivalent changes or modifications made according to the structure, characteristics and principles described in the patent protection scope of the present invention are included in the patent protection scope of the present invention.

Claims

1. A water-jet self-adaptive oil-free vacuum pump, comprising an air suction chamber (1), a cylinder (2) and a vacuum pumping component matched in the cylinder (2), the vacuum pumping component being used for vacuuming, characterized in that: The air suction chamber (1) is provided with a water spray hole (5) which is used to communicate with a water source (6). When vacuuming, the air suction chamber (1) draws water into the air suction chamber (1) through the water spray hole (5), and the amount of water drawn varies with the vacuum degree of the air suction chamber (1).

2. A water-jet adaptive oil-free vacuum pump according to claim 1, characterized in that: The water spray hole (5) is arranged on the inner wall surface of the cylinder (2) located on one side of the air suction chamber (1).

3. A water-jet adaptive oil-free vacuum pump according to claim 1 or 2, characterized in that: It also includes a flow channel, which is connected to the water source (6) and the water spray hole (5) respectively.

4. A water-jet adaptive oil-free vacuum pump according to claim 3, characterized in that: The water spray holes (5) are distributed in the flow channel, and the water spray holes (5) directly take water from the flow channel.

5. The water-jet adaptive oil-free vacuum pump according to claim 3, characterized in that: The flow channel comprises a water inlet hole (7) and a water outlet hole (8), and the water source (6) is respectively connected to the water inlet hole (7) and the water outlet hole (8) to form a water circulation.

6. A water-jet adaptive oil-free vacuum pump according to claim 5, characterized in that: The flow channel is at least arranged in the cylinder (2) itself.

7. A water-jet adaptive oil-free vacuum pump according to claim 6, characterized in that: A flow channel is provided on the outer wall surface of the cylinder (2), and the flow channel is covered by a sealing cover (9) to form a water cavity.

8. The water-jet adaptive oil-free vacuum pump according to claim 6, characterized in that: A first flow channel (10) and a second flow channel (11) are respectively provided on two lateral side walls of the cylinder (2), and an air cavity is formed between the two side walls. The vacuum extraction component moves in the air cavity to perform vacuum extraction.

9. The water-jet adaptive oil-free vacuum pump according to claim 8, characterized in that: The first flow channel (10) is provided with a water inlet hole (7), the second flow channel (11) is provided with a water outlet hole (8), a connecting water channel (12) is provided between the first flow channel (10) and the second flow channel (11), water flows through the water inlet hole (7), the first flow channel (10), the connecting water channel (12), the second flow channel (11), and the water outlet hole (8) in sequence, and the connecting water channel (12) is a pipeline or a flow channel provided on the cylinder (2).

10. The water-jet adaptive oil-free vacuum pump according to claim 6, characterized in that: The communicating water channel (12) is arranged in a transverse linear manner at the bottom of the cylinder (2).

11. The water-jet adaptive oil-free vacuum pump according to claim 10, characterized in that: The water inlet (7) is located at the upper left side of the first flow channel (10), a water spray hole (5) is arranged at the rear section of the first flow channel (10), and an inlet of a connecting water channel (12) is arranged at the end, so that water enters the second flow channel (11) through the connecting water channel (12), the upper right corner of the second flow channel (11) extends and circles back to the part where the air suction chamber (1) of the cylinder (2) is located, the rear section of the second flow channel (11) is located at the part where the air suction chamber (1) of the cylinder (2) is located, the water spray hole (5) is arranged at the rear section of the second flow channel (11), and a water outlet hole (8) is arranged at the end of the second flow channel (11).

12. The water-jet adaptive oil-free vacuum pump according to claim 9, characterized in that: A water outlet hole (8) is provided at the end of the second flow channel (11). The water outlet hole (8) can be directly connected to a water outlet pipe, or a water outlet cavity can be provided at the bottom of the cylinder (2). The water outlet cavity includes a cover (21), and a connecting outlet (22) is provided on the cover (21). The water outlet cavity can be integrally formed with an opening (20) when manufacturing the cylinder (2), and then the opening (20) is sealed by the cover (21).

13. The water-jet adaptive oil-free vacuum pump according to claim 5, characterized in that: It also includes a cooler (13), which is arranged in the water cycle constructed by the water source (6) and the flow channel to cool the water.

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