A water-proof vertical chemical slurry pump transmission assembly

Abstract

The present invention discloses a water-proof vertical chemical slurry pump transmission assembly, comprising a pump shaft, a bearing bushing, a bearing, a bearing housing, a bearing gland, and a locking nut; the locking nut comprises an annular retaining groove on the lower plate surface of an annular connecting plate and a plug-in structure of a positioning ring on the upper end of the bearing bushing and the upper plate surface of the bearing gland, so that a structure similar to a labyrinth seal is formed therein; at the same time, a skeleton oil seal is provided between the bearing bushing and the bearing gland to further improve the sealing effect; an O-ring is provided between the compression positioning surface of the lower plate surface of the bearing gland and the front end portion of the bearing housing, so that rainwater at the bearing housing will not penetrate into the bearing housing along the compression positioning surface of the bearing housing; at the same time, an annular drainage groove and a radial drainage hole are provided on the compression positioning surface of the bearing housing, which are connected to a small hole outside, and some accumulated rainwater can flow out through this hole. Through the mutual cooperation of the above components, a complete sealing structure is formed to prevent water from entering the bearing housing.

Description

Technical Field

[0001] The invention relates to a water-intrusion-proof vertical chemical slurry pump transmission component, belonging to the field of fluid machinery. Background Art

[0002] When the vertical chemical slurry pump is used outdoors, rainwater will enter the bearing box and damage the bearing. This requires the vertical chemical slurry pump to be designed with a water-proof sealing structure at the upper bearing gland.

[0003] This type of sealing structure is designed with sealing structures on both sides of the upper bearing cover. The traditional technology of the anti-water ingress structure of the transmission assembly of the neutral chemical slurry pump only uses a felt ring to seal between the bearing cover and the bearing bushing. This type of design has a simple structure. There is no sealing structure between the locking nut and the bearing bushing, and between the bearing cover and the bearing box. The overall sealing effect is poor. When the rain is heavy, it will cause rainwater to penetrate into the bearing box, destroy the bearing's lubrication system, and reduce the bearing's service life. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem of water ingress into the bearing box of a vertical chemical slurry pump transmission assembly, and to propose a water-ingress-proof vertical chemical slurry pump transmission assembly.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] The invention discloses a water-ingress-proof vertical chemical slurry pump transmission assembly, comprising a pump shaft, a bearing bushing, a bearing, a bearing box, a bearing gland, and a locking nut;

[0007] The middle part of the pump shaft is provided with a bushing connection section whose diameter matches the inner diameter of the bearing bushing; the lower end of the pump shaft bushing connection section is provided with an annular limit platform whose diameter is larger than that of the bushing connection section; the upper end of the pump shaft bushing connection section is provided with a threaded section whose diameter is smaller than that of the bushing connection section;

[0008] The inner hole of the locking nut is processed with an internal thread matching the threaded section of the pump shaft, the outer diameter of the locking nut matches the inner diameter of the bearing bushing, the upper end side wall of the locking nut is provided with an annular connecting plate, and the lower plate surface of the annular connecting plate of the locking nut is provided with an annular retaining groove;

[0009] The bearing gland is an annular plate structure, the inner wall of the bearing gland is provided with a skeleton oil seal mounting groove, the inner side of the upper plate surface of the bearing gland is provided with an upper positioning ring, the outer side of the lower plate surface of the bearing gland is provided with a pressing positioning surface, the inner side of the pressing positioning surface of the lower plate surface of the bearing gland is provided with a sealing ring mounting groove, and the inner side of the sealing ring mounting groove of the lower plate surface of the bearing gland is provided with a bearing pressure ring;

[0010] A bearing mounting position is provided on the inner wall of the upper port portion of the bearing box, a pressing and positioning surface is provided on the upper end portion of the bearing box, an annular drainage groove is provided downwardly in the middle portion of the pressing and positioning surface of the bearing box, and a group of drainage holes evenly distributed around the circumference are provided radially outwardly at the bottom of the annular drainage groove;

[0011] The cam is secured to the upper edge of the pump shaft via a secure coupling between the drive shaft and the drive shaft and is designed to couple the cams to the drive shaft via a secure coupling between the drive shaft and the bearing.

[0012] How it works

[0013] The annular retaining groove on the lower plate surface of the locking nut annular connecting plate is plugged into the upper end of the bearing bushing and the positioning ring on the upper plate surface of the bearing gland, so that a structure similar to a labyrinth seal is formed there. Most of the rainwater entering there will be thrown out under the action of centrifugal force. At the same time, a skeleton oil seal is also provided between the bearing bushing and the bearing gland to further improve the sealing effect.

[0014] An O-ring is installed between the compression surface of the lower plate of the bearing gland and the front end of the bearing housing to prevent rainwater from entering the bearing housing along the compression surface. An annular drainage groove and radial drainage holes are also provided on the compression surface of the bearing housing, allowing accumulated rainwater to flow out. The above components work together to form a complete sealing structure that prevents water from entering the bearing housing.

[0015] Beneficial effects:

[0016] The transmission assembly of the present invention redesigns the sealing structure of the vertical pump transmission assembly. A skeleton oil seal is arranged between the bearing cover and the bearing bushing, an O-ring is arranged between the bearing cover and the bearing box, a brim structure is arranged on the locking nut to form a labyrinth sealing structure, and a drain hole is arranged on the bearing box to form a closed sealing structure, thereby achieving the purpose of preventing water ingress. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the slurry pump transmission assembly of the present invention;

[0018] Among them: 1-locking nut, 2-bearing bushing, 3-skeleton oil seal, 4-bearing cover, 5-O-ring, 6-bearing box. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Example

[0021] The invention discloses a water-proof vertical chemical slurry pump transmission assembly, comprising a pump shaft, a bearing bushing 2, a bearing, a bearing box 6, a bearing gland 4, and a locking nut 1;

[0022] The middle part of the pump shaft is provided with a bushing connection section whose diameter matches the inner diameter of the bearing bushing 2; the lower end of the pump shaft bushing connection section is provided with an annular stopper whose diameter is larger than that of the bushing connection section; the upper end of the pump shaft bushing connection section is provided with a threaded section whose diameter is smaller than that of the bushing connection section;

[0023] The inner hole of the locking nut 1 is processed with an internal thread matching the threaded section of the pump shaft, the outer diameter of the locking nut 1 matches the inner diameter of the bearing bushing 2, the upper end side wall of the locking nut 1 is provided with an annular connecting plate, and the lower plate surface of the annular connecting plate of the locking nut 1 is provided with an annular retaining groove;

[0024] The bearing cover 4 is an annular plate structure, the inner wall of the bearing cover 4 is provided with a skeleton oil seal mounting groove, the inner side of the upper plate surface of the bearing cover 4 is provided with an upper positioning ring, the outer side of the lower plate surface of the bearing cover 4 is provided with a pressing positioning surface, the inner side of the pressing positioning surface of the lower plate surface of the bearing cover 4 is provided with a sealing ring mounting groove, and the inner side of the sealing ring mounting groove of the lower plate surface of the bearing cover 4 is provided with a bearing pressure ring;

[0025] The inner wall of the upper end portion of the bearing box 6 is provided with a bearing mounting position, the upper end portion of the bearing box 6 is provided with a pressing positioning surface, the middle portion of the pressing positioning surface of the bearing box 6 is provided with an annular drainage groove downwardly, and the bottom of the annular drainage groove is provided with a group of drainage holes evenly distributed around the circumference radially outward;

[0026] The bearing bushing 2 is sleeved on the bushing connecting section of the pump shaft, and the bearing bushing 2 is axially limited downward by the annular limit platform of the pump shaft; the bearing bushing 2 and the bearing box 6 are connected by a rotating bearing; the bearing pressure cover 4 is sleeved on the upper side wall of the bearing bushing 2, and a skeleton oil seal 3 is installed in the skeleton oil seal mounting groove on the inner wall of the bearing pressure cover 4; the locking nut 1 is threadedly connected to the threaded section at the upper end of the pump shaft, so that the upper end of the bearing bushing 2 is inserted into the inner side of the annular positioning groove of the lower plate surface of the annular connecting plate of the locking nut 1, and the bearing bushing 2 is axially limited upward, and at the same time, the upper positioning ring of the upper plate surface of the bearing pressure cover 4 is inserted into the outer side of the annular positioning groove of the lower plate surface of the annular connecting plate of the locking nut 1, and the pressing positioning surface of the lower plate surface of the bearing pressure cover 4 and the bearing pressure ring are pressed downward to respectively press the front port part of the bearing box 6 and the outer ring of the bearing; an O-ring 5 is installed in the sealing ring mounting groove of the lower plate surface of the bearing pressure cover 4.

[0027] The annular retaining groove on the lower plate surface of the annular connecting plate of the locking nut 1 is plugged into the upper end of the bearing bushing 2 and the positioning ring on the upper plate surface of the bearing gland 4, so that a structure similar to a labyrinth seal is formed there. Most of the rainwater entering there will be thrown out under the action of centrifugal force. At the same time, a skeleton oil seal is also provided between the bearing bushing 2 and the bearing gland 4 to further improve the sealing effect.

[0028] An O-ring is installed between the compression surface of the lower plate of the bearing gland 4 and the front end of the bearing housing 6 to prevent rainwater from entering the bearing housing along the compression surface. At the same time, an annular drainage groove and radial drainage holes are opened on the compression surface of the bearing housing to connect to the outside world, allowing some accumulated rainwater to flow out. The above components work together to form a complete sealing structure to prevent water from entering the bearing housing.

Claims

1. A water-proof vertical chemical slurry pump transmission assembly, characterized by: Including pump shaft, bearing bushing, bearing, bearing box, bearing cover, lock nut; The middle part of the pump shaft is provided with a bushing connection section whose diameter matches the inner diameter of the bearing bushing; the lower end of the pump shaft bushing connection section is provided with an annular limit platform whose diameter is larger than that of the bushing connection section; the upper end of the pump shaft bushing connection section is provided with a threaded section whose diameter is smaller than that of the bushing connection section; The inner hole of the locking nut is processed with an internal thread matching the threaded section of the pump shaft, the outer diameter of the locking nut matches the inner diameter of the bearing bushing, the upper end side wall of the locking nut is provided with an annular connecting plate, and the lower plate surface of the annular connecting plate of the locking nut is provided with an annular retaining groove; The bearing gland is an annular plate structure, the inner wall of the bearing gland is provided with a skeleton oil seal mounting groove, the inner side of the upper plate surface of the bearing gland is provided with an upper positioning ring, the outer side of the lower plate surface of the bearing gland is provided with a pressing positioning surface, the inner side of the pressing positioning surface of the lower plate surface of the bearing gland is provided with a sealing ring mounting groove, and the inner side of the sealing ring mounting groove of the lower plate surface of the bearing gland is provided with a bearing pressure ring; A bearing mounting position is provided on the inner wall of the upper port portion of the bearing box, a pressing and positioning surface is provided on the upper end portion of the bearing box, an annular drainage groove is provided downwardly in the middle of the pressing and positioning surface of the bearing box, and a group of drainage holes evenly distributed around the circumference are provided radially outwardly at the bottom of the annular drainage groove; The cam is secured to the upper edge of the pump shaft via a secure coupling between the drive shaft and the drive shaft and is designed to couple the cams to the drive shaft via a secure coupling between the drive shaft and the bearing.

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