CN219139357U

CN219139357U - Vacuum pump with leakage monitoring function

Info

Publication number: CN219139357U
Application number: CN202320175782.7U
Authority: CN
Inventors: 邵凯瑞
Original assignee: Fuguang Jingming Intelligent Electronic Technology Jinan Co ltd
Current assignee: Fuguang Jingming Intelligent Electronic Technology Jinan Co ltd
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-06-06
Anticipated expiration: 2033-02-07

Abstract

The utility model provides a vacuum pump with leakage monitoring, which comprises a driving shaft, a driven shaft and a plurality of rotors, wherein a vacuum pump housing is arranged outside the rotors, the driving shaft and the driven shaft are provided with bearing assemblies, and among the plurality of rotors, a gear transmission group is sleeved on the driving shaft and the driven shaft between a primary rotor and the vacuum pump housing; the bearing assembly comprises a spacer ring, an oil through groove is formed in the spacer ring, and an oil injection channel is formed in a vacuum pump shell on the outer side of the bearing assembly; the vacuum pump shell outside the gear transmission group is filled with lubricating oil, and the liquid level of the lubricating oil is higher than the upper plane of the tooth body; a first sealing ring, a second sealing ring and a third sealing ring are arranged between the driving shaft and the vacuum pump housing; the bearing and gear structures of the two rotating shafts are improved, the lubrication mechanism is added, the service lives of the bearing and the gear are prolonged, the sealing structure and the leakage monitoring structure which are arranged in a double-layer manner are added, and the oil leakage phenomenon in the use process is solved.

Description

Vacuum pump with leakage monitoring function

Technical Field

The utility model relates to the field of vacuum pumps, in particular to a vacuum pump with leakage monitoring.

Background

The vacuum pump is a gas capturing and gas transmitting device and is widely used in the industries of metallurgy, chemical industry, food, electronic coating and the like. The vertical vacuum pump is popular with the vast users due to small occupied space, flexible layout and easy control. However, the vertical vacuum pump in the prior art is basically improved from the existing horizontal structure, the technology is not in place in the aspects of bearing and gear lubrication and sealing, the phenomenon of bearing or gear heating and burning often occurs under the high-frequency rotating speed in the use process, the oil leakage phenomenon is common and serious due to the vertical structure, particularly, the oil tank of the gear part is directly connected with the motor mounting seat, if no real-time leakage monitoring configuration exists, only when leakage is found through oil dripped from the bottom of the pump body, part of lubricating oil is permeated into the motor, and the motor is damaged to a certain extent.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model provides the vacuum pump with the leakage monitoring function, which improves the bearing and gear structures of two rotating shafts, increases a lubrication mechanism, prolongs the service lives of the bearing and the gear, increases a double-layer sealing structure and a leakage monitoring structure, and solves the oil leakage phenomenon in the use process.

The vacuum pump with the leakage monitoring function comprises a driving shaft, a driven shaft and a plurality of rotors sleeved on the driving shaft and the driven shaft, wherein a vacuum pump housing is arranged outside the rotors, a bearing assembly is arranged between the driving shaft, the driven shaft and the vacuum pump housing, and among the plurality of rotors, a gear transmission group is sleeved on the driving shaft and the driven shaft between the primary rotor and the vacuum pump housing;

the bearing assembly comprises two first bearings which are symmetrically arranged, a spacer ring is arranged between the two first bearings, an oil through groove is formed in the spacer ring, and an oil injection channel is formed in a vacuum pump housing on the outer side of the bearing assembly;

the gear transmission group comprises two gears which are meshed with each other, the tooth body part of the gear is positioned at the lower part of the gear body, the vacuum pump shell outside the gears is filled with lubricating oil, and the liquid level of the lubricating oil is higher than the upper plane of the tooth body;

a bearing seat is arranged between the driving shaft and the vacuum pump housing, a first sealing ring is arranged between the bearing seat and the vacuum pump housing, a second sealing ring and a third sealing ring are arranged between the bearing seat and the driving shaft, and a second bearing is arranged between the second sealing ring and the third sealing ring;

the bottom of bearing frame is provided with the liquid detector, communication connection between liquid detector and the alarm controller.

Preferably, the two first bearings are angular contact ball bearings arranged face to face.

Preferably, the oil through groove is stepped, and the width of the outer ring is larger than that of the inner ring.

Preferably, expansion sleeves are respectively arranged between the gear and the driving shaft and between the gear and the driven shaft.

Preferably, the first sealing ring is an O-ring, and the second sealing ring and the third sealing ring are both skeleton sealing rings.

Preferably, the second bearing is a deep groove ball bearing.

The utility model has the beneficial effects that:

(1) According to the utility model, the isolating ring with the oil groove is additionally arranged between the first bearing and the second bearing, and the oil injection channel is arranged on the vacuum pump housing, so that the bearing is better lubricated, the gear teeth of the gear are immersed in lubricating oil, the gear transmission combination is greatly lubricated, and the service lives of the bearing and the gear are prolonged.

(2) The double-layer framework type sealing ring is added, the interference is utilized to ensure that the sealing structure is good, and the oil leakage phenomenon in the using process is solved.

(3) The utility model is additionally provided with the liquid detector and the alarm controller, so that the leakage of the pump body can be effectively detected on line.

Drawings

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

FIG. 1 is a diagram of the overall structure of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1A;

FIG. 3 is an enlarged view of part of B in FIG. 2;

in the figure: 1. the device comprises a driving shaft, 2, a driven shaft, 3, a vacuum pump housing, 4, a first bearing, 5, a spacer ring, 6, an oiling channel, 7, a gear, 8, a second sealing ring, 9, a second bearing, 10, a third sealing ring, 11, a first sealing ring, 12, a liquid detector, 13 and a sealing cover.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings of the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model is further described in detail below with reference to fig. 1 to 3:

as shown in fig. 1-3, the vacuum pump comprises a vacuum pump housing 3 arranged in multiple layers, a driving shaft 1 driven by a motor is arranged in the vacuum pump housing 3, a driven shaft 2 driven by the driving shaft 1 through a rotor and a gear 7, and a plurality of rotors sleeved on the driving shaft 1 and the driven shaft 2, a bearing assembly is arranged between the driving shaft 1, the driven shaft 2 and the vacuum pump housing 3, and a gear transmission set is sleeved on the driving shaft 1 and the driven shaft 2 between the primary rotor and the vacuum pump housing 3.

The bearing assembly comprises two symmetrically arranged first bearings 4 which are angular contact ball bearings arranged face to face. The isolating ring 5 is arranged between the two first bearings 4, the isolating ring is provided with the oil through groove which is in a ladder shape, the width of the outer ring is larger than that of the inner ring, a certain amount of lubricating oil can be temporarily stored through the outer ring, and excessive lubricating oil entering the bearing channel can be prevented from affecting the transmission accuracy.

An oiling channel is processed on the vacuum pump housing 3 outside the isolating ring 5 and is used for providing lubricating oil for the first bearing 4 through the isolating ring 5, and an oiling nozzle convenient to install and oiling is arranged between the oiling channel and the outside.

The gear transmission group comprises two gears 7 which are meshed with each other, the tooth body part of each gear is positioned at the lower part of the gear body, lubricating oil is filled in a vacuum pump shell outside the gears, and the liquid level of the lubricating oil is positioned on the upper plane of the tooth body, so that gear teeth which are engaged with each other in the process of rotating under the drive of the driving shaft are soaked in the environment of the lubricating oil all the time, timely cooling is achieved, and damage caused by overheating and burning is avoided.

A bearing seat is arranged between the driving shaft 1 and the vacuum pump housing 3, and a first sealing ring 11 is arranged between the bearing seat and the vacuum pump housing and is an O-shaped ring, so that the first sealing effect is achieved. The second sealing ring 8 and the third sealing ring 10 are arranged between the bearing seat and the driving shaft 1, the second sealing ring 8 and the third sealing ring are both framework type sealing rings 10, and the interference produced by shrinkage of the sealing rings is tightly matched with the driving shaft 1 during installation, so that the sealing structure is good, and the oil leakage phenomenon in the use process is solved. When the third sealing ring 10 is used, the opening is outward, and external dust can be effectively prevented from entering the pump body. The second bearing is arranged between the second sealing ring 8 and the third sealing ring 10, the second bearing is a deep groove ball bearing, and the bearing can have a good self-lubricating function by coating lubricating oil during installation, so that the service life is prolonged.

As shown in fig. 3, at the bottom of the bearing seat, a sealing cover 13 is connected with the vacuum pump housing, a liquid detector is mounted on the sealing cover, the liquid detector is in communication connection with an alarm controller, when three sealing rings are aged and damaged, lubricating oil flows through the sealing cover 13 at the bottom, the liquid detector sends out a signal to the alarm controller after detecting leakage liquid, and the alarm controller sends out an alarm to prompt staff to overhaul and stop damage in time.

The expansion sleeves used for connection are respectively arranged between the gear 7 and the driving shaft 1 and between the gear 7 and the driven shaft 2, so that the expansion sleeves are convenient to assemble and disassemble on the basis of ensuring good matching, and the operation procedures and the operation time can be saved for the replacement of the bearing and the gear.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. .

Claims

1. The vacuum pump with the leakage monitoring function is characterized by comprising a driving shaft, a driven shaft and a plurality of rotors sleeved on the driving shaft and the driven shaft, wherein a vacuum pump housing is arranged outside the rotors, a bearing assembly is arranged between the driving shaft, the driven shaft and the vacuum pump housing, and a gear transmission group is sleeved on the driving shaft and the driven shaft between the primary rotor and the vacuum pump housing among the plurality of rotors; the bearing assembly comprises two first bearings which are symmetrically arranged, a spacer ring is arranged between the two first bearings, an oil through groove is formed in the spacer ring, and an oil injection channel is formed in a vacuum pump housing on the outer side of the bearing assembly;

2. A vacuum pump with leakage monitoring according to claim 1, characterized in that the two first bearings are angular contact ball bearings arranged face to face.

3. The vacuum pump with leakage monitoring according to claim 1, wherein the oil passage groove is stepped, and the outer ring width is greater than the inner ring width.

4. A vacuum pump with leakage monitoring according to claim 1, wherein expansion sleeves are respectively arranged between the gear and the driving shaft and between the gear and the driven shaft.

5. The vacuum pump with leakage monitoring of claim 1, wherein the first seal ring is an O-ring, and the second seal ring and the third seal ring are both skeletal seal rings.

6. A vacuum pump with leakage monitoring according to claim 1, wherein the second bearing is a deep groove ball bearing.