A liquid ring vacuum pump anti-corrosion shaft seal structure

Abstract

The utility model relates to the technical field of anti-corrosion shaft seals, and discloses an anti-corrosion shaft seal structure for a liquid ring vacuum pump, including a pump housing, a connection groove is provided on the inner surface of the pump housing, a sealing plate is slidably connected inside the connection groove, a shaft seal is fixedly connected to the top of the sealing plate, a rotating shaft is sleeved on the top of the shaft seal, and four first receiving grooves are evenly provided in an annular shape, a starting mechanism for starting an airbag is provided at the bottom of the four first receiving grooves, four fixed grooves are provided on the surface of the rotating shaft, and a restraining mechanism for restraining the rotating shaft is provided inside the four fixed grooves. The utility model can avoid leakage through the provision of the airbag, because the piston chamber is mutually interpenetrating with the airbag, so when the piston disc moves inside the piston chamber, the gas inside the piston chamber can enter the airbag to expand the airbag, and the expanded airbag will then enter the inside of the rotating shaft, thereby avoiding leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-corrosion shaft seals, in particular to an anti-corrosion shaft seal structure for a liquid ring vacuum pump. Background Art

[0002] The anti-corrosion shaft seal structure of the liquid ring vacuum pump is a shaft seal design for the liquid ring vacuum pump, which is used to prevent the leakage of the medium in the pump and the entry of harmful substances from the outside into the pump. The liquid ring vacuum pump is a commonly used vacuum pump. Its working principle is to form a sealed liquid ring in the pump chamber through the liquid ring, and use the rotary motion of the liquid ring to inhale, compress and exhaust the gas. The anti-corrosion shaft seal structure of the liquid ring vacuum pump usually adopts a special shaft seal material, such as fluoroplastics, which can resist the erosion of corrosive media and improve the corrosion resistance of the shaft seal. The shaft seal is a shaft seal structure designed to prevent the leakage of the medium in the pump and the entry of harmful substances from the outside into the pump. It has corrosion resistance and sealing performance.

[0003] Although some existing liquid ring vacuum pump anti-corrosion shaft seals are equipped with sealing mechanisms during use, the sealing method is relatively simple, so leakage may still occur during actual use, causing the vacuum pump to malfunction. Therefore, this problem needs to be solved. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes an anti-corrosion shaft seal structure for a liquid ring vacuum pump.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A liquid ring vacuum pump anti-corrosion shaft seal structure comprises a pump casing, a connecting groove is provided on the inner surface of the pump casing, a sealing plate is slidably connected inside the connecting groove, a shaft seal is fixedly connected to the top of the sealing plate, a rotating shaft is sleeved on the top of the shaft seal, a third sealing groove is provided on the surface of the rotating shaft, a third receiving groove is provided inside the shaft seal on the side close to the third sealing groove, an airbag is installed inside the third receiving groove, the airbag cooperates with the third sealing groove and the third receiving groove, four first receiving grooves are provided on the top of the shaft seal, and the four first receiving grooves are evenly provided in a ring shape, a starting mechanism for starting the airbag is provided at the bottom of the four first receiving grooves, four fixed grooves are provided on the surface of the rotating shaft, and a restraining mechanism for restraining the rotating shaft is provided inside the four fixed grooves. By setting the airbag, leakage can be avoided.

[0007] As a further solution of the present utility model, the starting mechanism includes a piston warehouse, which is opened at the bottom of the first receiving groove, an adjusting disk is rotatably connected inside the first receiving groove, a worm is fixedly connected to the bottom of the adjusting disk, a first screw is fixedly connected to the bottom of the worm, the first screw is rotatably connected to the inner surface of the piston warehouse, and the piston warehouse and the airbag are arranged to be interconnected, two second limit rods are symmetrically fixedly connected to the inner surface of the piston warehouse, the two second limit rods and the surface of the first screw rod are sleeved with the same piston disk, and a sealing mechanism for sealing the piston warehouse is provided inside the first receiving groove, and the airbag can be started by the setting of the piston warehouse.

[0008] As a further solution of the utility model, the sealing mechanism includes a first sealing groove, the first sealing groove is opened on the surface of the first receiving groove, the inner surface of the first receiving groove is opened with a second sealing groove, a first sealing ring is rotatably connected inside the first sealing groove, the first sealing ring is sleeved on the surface of the adjusting disk, the second sealing ring is rotatably connected inside the second sealing groove, and the second sealing ring is fixedly connected to the bottom of the adjusting disk. By setting the sealing ring, the piston chamber can be sealed.

[0009] As a further scheme of the utility model, the restraining mechanism includes a second receiving groove, the second receiving groove is opened on one side of the piston chamber, the second side of the piston chamber is rotatably connected to the second screw, the surface of the second screw close to the worm is sleeved with a worm wheel, the worm wheel and the worm are arranged to cooperate with each other, the surface of the second receiving groove close to the second screw is fixedly connected with two first limit rods, the surfaces of the second screw and the first limit rod are sleeved with the same fixed block, the fixed block slides in the second receiving groove and the fixed groove, the surface of the rotating shaft is opened with a docking groove, the docking groove is slidably connected with a docking block, the docking block is fixedly connected to the inside of the shaft seal, and the shaft seal can be constrained by the setting of the fixed block.

[0010] The beneficial effects of the utility model are:

[0011] 1. The shaft seal can be fixed by setting a fixed block. A worm wheel is provided on the surface of the worm, and the worm wheel is sleeved on the surface of the second screw. Therefore, when the worm rotates, the second screw can rotate synchronously. A fixed block is sleeved on the surface of the second screw, and the fixed block slides inside the shaft seal. Therefore, when the second screw rotates, the fixed block can move, and the moved fixed block will enter the inside of the rotating shaft, thereby achieving the purpose of fixing the shaft seal.

[0012] 2. Leakage can be avoided by setting the airbag, because the piston chamber and the airbag are mutually connected. Therefore, when the piston disc moves inside the piston chamber, the gas inside the piston chamber can enter the airbag to expand the airbag, and the expanded airbag will then enter the inside of the rotating shaft, thereby avoiding leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of an anti-corrosion shaft seal structure for a liquid ring vacuum pump proposed by the utility model;

[0014] Figure 2 A schematic cross-sectional structure diagram of an anti-corrosion shaft seal structure for a liquid ring vacuum pump proposed by the utility model;

[0015] Figure 3 This is a schematic diagram of a first partial structure of an anti-corrosion shaft seal structure for a liquid ring vacuum pump proposed by the utility model;

[0016] Figure 4 A schematic diagram of a starting mechanism of an anti-corrosion shaft seal structure for a liquid ring vacuum pump proposed by the utility model;

[0017] Figure 5 A schematic diagram of a restraint mechanism of an anti-corrosion shaft seal structure of a liquid ring vacuum pump proposed by the utility model;

[0018] Figure 6 This is a schematic diagram of the second partial structure of the anti-corrosion shaft seal structure of a liquid ring vacuum pump proposed by the utility model.

[0019] In the figure: 1, pump housing; 2, shaft seal; 3, adjusting disk; 4, rotating shaft; 101, connecting groove; 201, first receiving groove; 202, first sealing groove; 203, second sealing groove; 204, piston chamber; 205, second receiving groove; 206, third receiving groove; 207, sealing plate; 301, first sealing ring; 302, second sealing ring; 303, first screw; 304, worm; 305, worm wheel; 306, second screw; 307, fixing block; 308, first limiting rod; 309, piston disk; 310, second limiting rod; 401, docking groove; 402, fixing groove; 403, third sealing groove; 404, air bag. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] Reference Figure 1-Figure 6 , an anti-corrosion shaft seal structure of a liquid ring vacuum pump, comprising a pump housing 1, a connecting groove 101 is provided on the inner surface of the pump housing 1, a sealing plate 207 is slidably connected inside the connecting groove 101, a shaft seal 2 is fixedly connected to the top of the sealing plate 207, a rotating shaft 4 is sleeved on the top of the shaft seal 2, a third sealing groove 403 is provided on the surface of the rotating shaft 4, a third receiving groove 206 is provided inside the shaft seal 2 near the third sealing groove 403, an air bag 404 is installed inside the third receiving groove 206, the air bag 404 cooperates with the third sealing groove 403 and the third receiving groove 206, four first receiving grooves 201 are provided on the top of the shaft seal 2, and the four first receiving grooves 201 are evenly provided in an annular shape, a starting mechanism for starting the air bag 404 is provided at the bottom of the four first receiving grooves 201, four fixed grooves 402 are provided on the surface of the rotating shaft 4, and a restraining mechanism for restraining the rotating shaft 4 is provided inside the four fixed grooves 402. By setting the air bag 404, leakage can be avoided.

[0023] Reference Figure 3-Figure 6 In a preferred embodiment, the starting mechanism includes a piston bin 204, which is opened at the bottom of the first receiving groove 201. An adjusting disk 3 is rotatably connected inside the first receiving groove 201, and a worm 304 is fixedly connected to the bottom of the adjusting disk 3. A first screw 303 is fixedly connected to the bottom of the worm 304. The first screw 303 is rotatably connected to the inner surface of the piston bin 204, and the piston bin 204 and the airbag 404 are arranged to be interconnected. Two second limit rods 310 are symmetrically fixedly connected to the inner surface of the piston bin 204. The two second limit rods 310 and the surface of the first screw 303 are sleeved with the same piston disk 309. A sealing mechanism for sealing the piston bin 204 is provided inside the first receiving groove 201. The airbag 404 can be started by the setting of the piston bin 204.

[0024] Reference Figure 3 and Figure 4 In a preferred embodiment, the sealing mechanism includes a first sealing groove 202, the first sealing groove 202 is opened on the surface of the first receiving groove 201, the inner surface of the first receiving groove 201 is opened with a second sealing groove 203, the first sealing groove 202 is rotatably connected with a first sealing ring 301, the first sealing ring 301 is sleeved on the surface of the adjusting disk 3, the second sealing groove 203 is rotatably connected with a second sealing ring 302, and the second sealing ring 302 is fixedly connected to the bottom of the adjusting disk 3. By setting the sealing ring, the piston chamber 204 can be sealed.

[0025] Reference Figure 3-Figure 5In a preferred embodiment, the constraint mechanism includes a second receiving groove 205, the second receiving groove 205 is opened on one side of the piston chamber 204, a second screw rod 306 is rotatably connected to one side of the piston chamber 204, a worm wheel 305 is sleeved on the surface of the second screw rod 306 close to the worm 304, the worm wheel 305 and the worm 304 are arranged in cooperation with each other, two first limiting rods 308 are fixedly connected to the surface of the second receiving groove 205 close to the second screw rod 306, the second screw rod 306 and the first limiting rod 308 are sleeved on the surface of the same fixed block 307, the fixed block 307 slides inside the second receiving groove 205 and the fixed groove 402, a docking groove 401 is opened on the surface of the rotating shaft 4, a docking block is slidably connected inside the docking groove 401, and the docking block is fixedly connected to the inside of the shaft seal 2, and the shaft seal 2 can be constrained by the setting of the fixed block 307.

[0026] From the above description, it can be seen that the above-mentioned embodiment of the utility model achieves the following technical effects: when in use, the shaft seal 2 is sleeved on the surface of the rotating shaft 4, and a sealing plate 207 is installed at the bottom of the shaft seal 2. When the shaft seal 2 is sleeved on the surface of the rotating shaft 4, the sealing plate 207 will enter the connecting groove 101. After the shaft seal 2 is placed, the adjusting disk 3 can be rotated. A worm 304 and a first screw 303 are installed at the bottom of the adjusting disk 3, so that when the adjusting disk 3 rotates, the worm 304 and the first screw 303 will rotate. A worm wheel 305 is matched on the surface of the worm 304, and the worm wheel 305 is sleeved on the surface of the second screw 306, so that when the worm 304 rotates, the second screw 306 can rotate synchronously, and a fixing block 307 is sleeved on the surface of the second screw 306, and the fixing block 307 is a sliding The first screw rod 303 is provided with a piston disc 309, and two second limit rods 310 are provided at the bottom of the piston disc 309. Due to the restriction of the second limit rods 310, when the first screw rod 303 rotates, the piston disc 309 can be moved downward. Because the piston chamber 204 is interconnected with the airbag 404, when the piston disc 309 moves inside the piston chamber 204, the gas inside the piston chamber 204 can enter the airbag 404 to expand the airbag 404, and the expanded airbag 404 will then enter the inside of the rotating shaft 4, thereby avoiding leakage.

[0027] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A liquid ring vacuum pump anti-corrosion shaft seal structure, comprising a pump housing (1), characterized in that: The pump housing (1) has an inner surface provided with a connection groove (101), a sealing plate (207) is slidably connected inside the connection groove (101), a shaft seal (2) is fixedly connected to the top of the sealing plate (207), a rotating shaft (4) is sleeved on the top of the shaft seal (2), a third sealing groove (403) is provided on the surface of the rotating shaft (4), a third receiving groove (206) is provided inside the shaft seal (2) on a side close to the third sealing groove (403), and an air bag (404) is installed inside the third receiving groove (206), The airbag (404) cooperates with the third sealing groove (403) and the third receiving groove (206); four first receiving grooves (201) are opened on the top of the shaft seal (2); and the four first receiving grooves (201) are opened evenly in a ring shape; a starting mechanism for starting the airbag (404) is provided at the bottom of the four first receiving grooves (201); four fixing grooves (402) are opened on the surface of the rotating shaft (4); and a restraining mechanism for restraining the rotating shaft (4) is provided inside the four fixing grooves (402).

2. The anti-corrosion shaft seal structure of a liquid ring vacuum pump according to claim 1, characterized in that: The starting mechanism comprises a piston chamber (204), wherein the piston chamber (204) is arranged at the bottom of a first receiving groove (201), an adjusting disk (3) is rotatably connected inside the first receiving groove (201), a worm (304) is fixedly connected to the bottom of the adjusting disk (3), a first screw (303) is fixedly connected to the bottom of the worm (304), the first screw (303) is rotatably connected to the inner surface of the piston chamber (204), and the piston chamber (204) and the air bag (404) are arranged to be interpenetrating.

3. The anti-corrosion shaft seal structure of a liquid ring vacuum pump according to claim 2, characterized in that: Two second limit rods (310) are symmetrically fixedly connected to the inner surface of the piston bin (204); the two second limit rods (310) and the surface of the first screw rod (303) are sleeved with the same piston disc (309); and a sealing mechanism for sealing the piston bin (204) is provided inside the first receiving groove (201).

4. The anti-corrosion shaft seal structure of a liquid ring vacuum pump according to claim 3, characterized in that: The sealing mechanism comprises a first sealing groove (202), the first sealing groove (202) being provided on the surface of the first receiving groove (201), the inner surface of the first receiving groove (201) being provided with a second sealing groove (203), the first sealing groove (202) being internally rotatably connected with a first sealing ring (301), the first sealing ring (301) being sleeved on the surface of the adjusting disk (3), the second sealing groove (203) being internally rotatably connected with a second sealing ring (302), and the second sealing ring (302) being fixedly connected to the bottom of the adjusting disk (3).

5. The anti-corrosion shaft seal structure of a liquid ring vacuum pump according to claim 4, characterized in that: The restraining mechanism comprises a second receiving groove (205), wherein the second receiving groove (205) is arranged on one side of the piston chamber (204), and a second screw rod (306) is rotatably connected to one side of the piston chamber (204), and a worm wheel (305) is sleeved on the surface of the second screw rod (306) close to the worm rod (304), and the worm wheel (305) and the worm rod (304) are arranged to cooperate with each other, and two first limit rods (308) are fixedly connected to the surface of the second receiving groove (205) close to the second screw rod (306).

6. The anti-corrosion shaft seal structure of a liquid ring vacuum pump according to claim 5, characterized in that: The second screw rod (306) and the first limiting rod (308) are sleeved with a same fixed block (307), and the fixed block (307) slides inside the second receiving groove (205) and the fixed groove (402). The surface of the rotating shaft (4) is provided with a docking groove (401), and the docking groove (401) is slidably connected with a docking block, and the docking block is fixedly connected to the inside of the shaft seal (2).

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