CN203948452U - Spindle-type sealed four-row double-race cylindrical roller bearings - Google Patents

Abstract

A mandrel type sealed four-row double-raceway cylindrical roller bearing comprises a pin shaft, an outer ring, four rows of cylindrical rollers, a retainer and a sealing retainer ring. The retainer is an integrated retainer, the outer ring is a double-roller-way integrated outer ring, one retainer is arranged in each roller way of the outer ring, two rows of cylindrical rollers are arranged in each retainer pocket, and the two rows of cylindrical rollers are arranged side by side, so that the outer ring, the retainer and the four rows of cylindrical rollers form a component. The sealing check rings are respectively arranged in the sealing grooves arranged on the inner cylindrical surfaces at the two ends of the outer ring. The pin shaft sleeve is arranged in an assembly formed by the outer ring, the retainer and the four rows of cylindrical rollers, a gap of 2-3 mm is reserved between the pin shaft and the sealing retainer ring, and the outer diameter of the pin shaft is in rolling connection with the four rows of cylindrical rollers. The utility model discloses bearing capacity is high, and processing technology is simple, guarantees that bearing accuracy and installation are dismantled, lubricated convenient, and the life of extension bearing has improved social economic benefits.

Description

Spindle-type sealed four-row double-race cylindrical roller bearings

technical field

The utility model relates to the technical field of bearings, in particular to a novel mandrel-type sealed four-row double-raceway cylindrical roller bearing for a diaphragm pump.

Background technique

At present, the four-row cylindrical roller bearings used in existing diaphragm pumps generally adopt a four-row raceway structure in which the outer ring is integrated. The outer ring of this structure has four rows of raceways and three middle ribs. The outer ring is prone to concentrated stress during the quenching, grinding, and load-bearing processes. The middle ribs and lubricating oil grooves will become the source of cracks that may occur on the outer ring. , so that the bearing is easy to damage and reduce the service life of the bearing. There are many bearing raceways in this structure. When processing multiple raceways, the measurement error is too large. The variation of the track diameter is large and the precision of the bearing is high, so it is difficult to process.

The four-row cylindrical roller bearing used in the existing diaphragm pump adopts a glycerin lubrication structure with double seals at both ends, and it is difficult for the grease to spread effectively and quickly to the entire lubricating surface. When working, the internal lubrication of the bearing cannot be guaranteed after the grease leaks, and the bearing is easy to wear, which affects the service life.

Utility model content

The technical problem to be solved by the utility model is to provide a new type of mandrel-type sealed four-row double-race cylindrical roller bearing for diaphragm pumps with high bearing capacity, simple processing technology, guaranteed bearing accuracy, convenient installation, disassembly and lubrication.

The technical solutions adopted are:

The mandrel-type sealed four-row double-race cylindrical roller bearing includes a pin shaft, an outer ring, four-row cylindrical rollers, a cage, and a seal retaining ring. The cage is an integrated cage, and the outer ring is a double-raceway integrated outer ring. A cage is installed in each raceway of the outer ring, and two rows of cylindrical rollers are installed in each cage pocket. And two rows of cylindrical rollers are arranged side by side, so that the outer ring, cage and four rows of cylindrical rollers form an assembly. The sealing retaining rings are respectively loaded into the sealing grooves provided on the inner cylindrical surfaces at both ends of the outer ring. The pin shaft is set into the assembly formed by the outer ring, cage and four-row cylindrical rollers. There is a gap of 2~3mm between the pin shaft and the sealing ring, and the outer diameter of the pin shaft and the four-row cylindrical roller roll connect.

The outer circle of the sealing retaining ring is provided with a convex outer edge, and the convex outer edge and the sealing groove on the outer ring are fitted in a transition fit concave-convex structure.

The above-mentioned outer ring is provided with an oil groove oil hole in the way of thin oil lubrication, and the lubricating oil communicates with the gap between the sealing retaining ring and the pin shaft through the oil groove oil hole.

The utility model adopts a structure with a cage, which effectively ensures the ability of the bearing to resist shock loads and adapt to heavy loads, and at the same time increases the rotational speed of the bearing. This structure avoids excessive stress concentration due to the middle rib, and also avoids cracks that may occur during heat treatment, quenching and grinding of the outer ring due to excessive oil grooves, so that the bearing runs stably, reduces the risk of bearing damage, and improves the life of the bearing. In addition, the utility model adopts the cutting mode of double-row support and double grinding wheel to process the raceway, which improves the machining precision of the raceway and improves the product quality. A certain gap is reserved between the sealing retaining ring and the pin shaft, and the bearing is lubricated by means of thin oil lubrication through the oil hole of the outer ring oil groove and the gap between the sealing retaining ring and the pin shaft. The lubricating oil in the housing circulates to wash away the pollutants inside the bearing The bearing wear is reduced and the heat dissipation performance is better, the manufacturability of bearing assembly is improved, the service life of the bearing is prolonged, and the economic benefit is improved.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Fig. 2 is an enlarged view of I in Fig. 1 .

Detailed ways

The mandrel-type sealed four-row double-race cylindrical roller bearing includes pin shaft 1, outer ring 2, four-row cylindrical roller 3, cage 4, and sealing ring 5. The cage 4 is an integrated cage, and the outer ring 2 is a double-raceway integrated outer ring. Each raceway of the outer ring 2 is loaded with a cage 4, and each cage 4 is equipped with two pockets. One row of cylindrical rollers, and two rows of cylindrical rollers are arranged side by side, so that the outer ring 1, cage 4 and four rows of cylindrical rollers 3 form an assembly. The outer circle of the sealing retaining ring 5 is provided with a convex outer edge 7, and its convex outer edge 7 and the sealing groove 6 on the outer ring are fitted with a transitional concave-convex structure (see Figure 2), and the sealing retaining ring 5 respectively into the sealing grooves 6 provided on the inner cylindrical surfaces at both ends of the outer ring 2 . The pin shaft 1 is set into the assembly formed by the outer ring 2, the cage 4 and the four rows of cylindrical rollers 3. There is a gap of 2~3mm between the pin shaft 1 and the sealing retaining ring 5. The outer diameter of the pin shaft 1 It is connected with four rows of cylindrical rollers 3 rolling. The outer ring 2 is provided with an oil groove oil hole 8 in the way of thin oil lubrication, and the lubricating oil communicates with the gap between the sealing retaining ring 2 and the pin shaft 1 through the oil groove oil hole 8 to realize the lubrication of the bearing.

Claims (3)

1. Mandrel-type sealed four-row double-race cylindrical roller bearing, including pin shaft (1), outer ring (2), four-row cylindrical roller (3), cage (4), sealing retaining ring (5) , characterized in that the cage (4) is an integrated cage, the outer ring (2) is a double raceway integrated outer ring, and each raceway of the outer ring (2) is loaded with a cage (4) , two rows of cylindrical rollers are installed in the pockets of each cage (4), and the two rows of cylindrical rollers are arranged side by side, so that the outer ring (2), cage (4) and four rows of cylindrical rollers (3) form One component, the sealing retaining ring (5) is respectively installed in the sealing groove (6) provided on the inner cylindrical surface of both ends of the outer ring (2), and the pin shaft (1) is sleeved into the outer ring (2), holding In the assembly formed by the frame (4) and the four rows of cylindrical rollers (3), there is a gap of 2~3mm between the pin shaft (1) and the sealing retaining ring (5), and the outer diameter of the pin shaft (1) is the same as that of the four Columns of cylindrical rollers (3) are rolling connected. 2. The mandrel-type sealed four-row double-race cylindrical roller bearing according to claim 1, characterized in that the outer circle of the sealing retaining ring (5) is provided with a convex outer edge (7), which The convex outer edge (7) and the sealing groove (6) on the outer ring are installed in a transition fit concave-convex structure. 3. The mandrel-type sealed four-row double-race cylindrical roller bearing according to claim 1, characterized in that the outer ring (2) is a double-race integrated outer ring and is provided with thin oil lubrication The oil groove hole (8), lubricating oil through the oil groove hole (8) is connected to the gap between the sealing retaining ring (5) and the pin shaft (1).