CN219587766U

CN219587766U - Rubber gear pump

Info

Publication number: CN219587766U
Application number: CN202320616865.5U
Authority: CN
Inventors: 藕海军
Original assignee: Ningbo Tianneng Machinery Manufacturing Co ltd
Current assignee: Ningbo Tianneng Machinery Manufacturing Co ltd
Priority date: 2023-03-21
Filing date: 2023-03-21
Publication date: 2023-08-25
Anticipated expiration: 2033-03-21

Abstract

The utility model provides a rubber gear pump, which comprises: comprises a pump body, a gear set, two pressing plates and two supporting plates; the pump body is provided with an inner cavity, and two sides of the pump body are respectively provided with a feed inlet and a discharge outlet; the gear set is arranged in the inner cavity and comprises two gear shafts which are arranged in parallel and meshed with each other; the two pressing plates are respectively connected to two ends of the pump body, each pressing plate is provided with two shaft holes, each shaft hole is connected with a sealing shaft sleeve, and the sealing shaft sleeve and the corresponding gear shaft are coaxially arranged; the two support plates are respectively connected to the outer ends of the two pressing plates, each support plate is provided with two bearings, and the two bearings and the corresponding gear shafts are coaxially arranged; the two ends of the shaft lever of the gear shaft are rotationally connected to the corresponding bearings. The outer end of the pressing plate is connected with the supporting plate, and the bearing is arranged on the supporting plate, so that the bearing can bear the gear shaft, the sealing shaft sleeve only performs a sealing function, the abrasion of the sealing shaft sleeve and the gear shaft can be reduced, and the service life of the sealing shaft sleeve is prolonged.

Description

Rubber gear pump

Technical Field

The utility model relates to the technical field of gear pumps, in particular to a rubber gear pump.

Background

The rubber gear pump is mainly used for conveying, pressurizing and metering rubber melt and is widely applied to extrusion or molding of plastic, resin, rubber and chemical fiber products. The rubber gear pump generally comprises a pump body and two gear shafts penetrating through the pump body, wherein the two gear shafts are arranged in parallel and meshed for transmission, a feed inlet and a discharge outlet are respectively arranged on two sides of the pump body, and the feed inlet and the discharge outlet are corresponding to the meshed positions of the two gear shafts. The shaft holes on two sides of the pump body are connected with the sealing shaft sleeve, the sealing shaft sleeve can play a role of a bearing, and meanwhile, the sealing shaft sleeve is internally provided with reverse threads, so that the overflow speed of rubber melt from a gap between the gear shaft and the sealing shaft sleeve can be reduced, and the sealing effect is achieved.

However, the sealing shaft sleeve is stressed too much, the abrasion between the sealing shaft sleeve and the gear shaft is serious, so that the gap between the gear shaft and the sealing shaft sleeve is too large, the overflow speed of the rubber melt from the gap between the gear shaft and the sealing shaft sleeve is too high, parts have to be replaced, the service life of the rubber gear pump is shortened, and the parts are very troublesome to replace; in addition, the price of the parts is also low, and the replacement cost is also high.

Disclosure of Invention

The utility model aims to solve the technical problems that: the rubber gear pump overcomes the defects of the prior art, and can reduce the abrasion of the gear shaft and the sealing shaft sleeve so as to prolong the service life of equipment.

The technical scheme of the utility model is that a rubber gear pump with the following structure is provided: comprising

The pump body is provided with an inner cavity penetrating through two ends of the pump body; a feed inlet is formed in one side of the pump body, a discharge outlet is formed in the other side of the pump body, and the feed inlet and the discharge outlet are symmetrically arranged;

the gear set is arranged in the inner cavity; the gear set comprises two gear shafts which are arranged in parallel and meshed with each other, and the feed inlet and the discharge outlet correspond to the meshed positions of the two gear shafts;

two pressing plates respectively connected to two ends of the pump body; each pressing plate is provided with two shaft holes, each shaft hole is connected with a sealing shaft sleeve, and the sealing shaft sleeves are coaxially arranged with the corresponding gear shafts and used for allowing the shaft rods of the corresponding gear shafts to pass through;

the two support plates are respectively connected to the outer ends of the two pressing plates; two bearings are arranged on each supporting plate, and the two bearings and the corresponding gear shafts are coaxially arranged; the two ends of the shaft rod of the gear shaft are rotatably connected to corresponding bearings.

After adopting above structure, the rubber gear pump of the utility model has the following advantages compared with the prior art:

through the outer end connection backup pad at two clamp plates to set up the bearing in the backup pad, let the bearing bear the gear shaft, sealed axle sleeve only makes sealed effect, can reduce the wearing and tearing of gear shaft and sealed axle sleeve, thereby improves its life, avoids the gap between sealed axle sleeve and the gear shaft too big simultaneously, reduces the speed that the rubber fuse-element overflowed from the gap between sealed axle sleeve and the gear shaft.

Preferably, the sealing sleeve comprises a first sleeve part and a second sleeve part, the first sleeve part is arranged on the corresponding shaft hole, the second sleeve part is arranged in the inner cavity, and the outer wall of the second sleeve part is attached to the inner wall of the inner cavity.

Preferably, a overflow groove is arranged on one side wall of the supporting plate, facing the pressing plate, and penetrates through the upper end face and the lower end face of the supporting plate and is enclosed with the corresponding pressing plate to form an overflow channel. Because the rubber melt can slightly overflow from the gap between the sealing shaft sleeve and the gear shaft, the rubber melt also has a lubricating effect, so that the abrasion between the sealing shaft sleeve and the gear shaft is reduced; and the overflow trough is arranged on the supporting plate, so that overflowed rubber melt can be discharged, and the sealing shaft sleeve is prevented from being blocked.

Preferably, a plurality of positioning convex blocks are arranged on one side wall of the supporting plate, which faces the pressing plate, positioning grooves are arranged on the pressing plate at positions corresponding to the positioning convex blocks, and the positioning convex blocks are clamped in the corresponding positioning grooves. This allows for a better fitting of the support plate to the pressure plate.

Preferably, the supporting plate is provided with two mounting holes, and the bearings are connected in the corresponding mounting holes; the opening of mounting hole outer end is connected with the gland, the gland is used for preventing the bearing from deviating from in the mounting hole.

Preferably, a sealing ring is further arranged between the gland and the bearing. This ensures that the lubrication oil fills the bearing cavity of the bearing.

Preferably, one end of one gear shaft extends to the outer side of the gland and is provided with transmission teeth for connecting with the output end of the transmission unit.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is an exploded view of the present utility model.

Fig. 3 is a transverse half-sectional view of the present utility model.

Fig. 4 is a longitudinal half-sectional view of the present utility model.

Reference numerals illustrate:

1. pump body, 11, inner chamber, 12, feed inlet, 13, discharge gate, 2, gear train, 21, gear shaft, 22, driving tooth, 3, clamp plate, 31, shaft hole, 32, sealing sleeve, 33, first axle sleeve portion, 34, second axle sleeve portion, 35, constant head tank, 4, backup pad, 41, bearing, 42, flash tank, 43, flash channel, 44, positioning lug, 45, mounting hole, 46, gland, 47, sealing washer.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the specific examples.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be 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, while the terms "first", "second", etc. are merely names for distinguishing the respective components, and have no major and minor relationships, and thus should not be construed as limiting the present utility model.

As shown in fig. 1, 2, 3 and 4;

the utility model discloses a rubber gear pump, which comprises: comprises a pump body 1, a gear set 2, two pressing plates 3 and two supporting plates 4.

The pump body 1 is provided with an inner cavity 11 penetrating through two ends of the pump body; one side of the pump body 1 is provided with a feed inlet 12, the other side of the pump body 1 is provided with a discharge outlet 13, and the feed inlet 12 and the discharge outlet 13 are symmetrically arranged.

The gear set 2 is arranged in the inner cavity 11; the gear set 2 comprises two gear shafts 21 which are arranged in parallel and meshed with each other, and the feed inlet 12 and the discharge outlet 13 correspond to the meshing positions of the two gear shafts 21.

The two pressing plates 3 are respectively connected to the two ends of the pump body 1; each pressing plate 3 is provided with two shaft holes 31, each shaft hole 31 is connected with a sealing shaft sleeve 32, and the sealing shaft sleeve 32 and the corresponding gear shaft 21 are coaxially arranged and used for allowing the shaft rod of the corresponding gear shaft 21 to pass through.

The two support plates 4 are respectively connected to the outer ends of the two pressing plates 3; two bearings 41 are arranged on each supporting plate 4, and the two bearings 41 and the corresponding gear shafts 21 are coaxially arranged; the shaft ends of the gear shaft 21 are rotatably connected to respective bearings 41.

By connecting the support plates 4 at the outer ends of the two pressing plates 3 and arranging the bearings 41 on the support plates 4, the bearings 41 are used for bearing the gear shafts 21, and the sealing shaft sleeve 32 only performs a sealing function, so that the abrasion to the sealing shaft sleeve 32 can be reduced, the service life of the sealing shaft sleeve 32 is prolonged, the gap between the sealing shaft sleeve 32 and the gear shafts 21 is prevented from being too large, and the overflow speed of rubber melt from the gap between the sealing shaft sleeve 32 and the gear shafts 21 is reduced too fast.

The sealing sleeve 32 includes a first sleeve portion 33 and a second sleeve portion 34, the first sleeve portion 33 is mounted on the corresponding shaft hole 31, the second sleeve portion 34 is disposed in the inner cavity 11 and an outer wall of the second sleeve portion 34 is fitted with an inner wall of the inner cavity 11.

A overflow trough 42 is arranged on one side wall of the supporting plate 4 facing the pressing plate 3, and the overflow trough 42 penetrates through the upper end face and the lower end face of the supporting plate 4 and is enclosed with the corresponding pressing plate 3 to form an overflow channel 43. Since the rubber melt overflows from the gap between the sealing sleeve 32 and the gear shaft 21 in a small amount, the rubber melt also plays a role in lubrication, so that the abrasion between the sealing sleeve 32 and the gear shaft 21 is reduced; a spillway groove 42 is arranged on the supporting plate 4 to discharge spilled rubber melt and prevent the sealing shaft sleeve 32 from being blocked.

The backup pad 4 is equipped with a plurality of positioning lug 44 on towards the lateral wall of clamp plate 3, and the position that corresponds with positioning lug 44 on the clamp plate 3 is equipped with constant head tank 35, and positioning lug 44 joint is in corresponding constant head tank 35, so can be better with backup pad 4 assembly to clamp plate 3 on.

The support plate 4 is provided with two mounting holes 45, and the bearings 41 are connected in the corresponding mounting holes 45; the opening of the outer end of the mounting hole 45 is connected with a gland 46, and the gland 46 is used for preventing the bearing 41 from falling out of the mounting hole 45. A sealing ring 47 is also arranged between the gland 46 and the bearing 41.

One end of one of the gear shafts 21 extends to the outside of the gland 46 and is provided with a driving tooth 22 for connection of an output end of a driving unit, such as a driving motor.

The foregoing is merely illustrative of the present utility model, and the scope of the present utility model is not limited thereto, and any changes or substitutions that may be easily contemplated by those skilled in the art within the scope of the present utility model should be included within the scope of the present utility model, and the scope of the present utility model shall be defined by the appended claims.

Claims

1. A rubber gear pump, characterized in that: comprising

The pump body (1) is provided with an inner cavity (11) penetrating through two ends of the pump body; a feed inlet (12) is formed in one side of the pump body (1), a discharge outlet (13) is formed in the other side of the pump body (1), and the feed inlet (12) and the discharge outlet (13) are symmetrically arranged;

a gear set (2) arranged in the inner cavity (11); the gear set (2) comprises two gear shafts (21) which are arranged in parallel and meshed with each other, and the positions of the feeding hole (12) and the discharging hole (13) at the meshing positions of the two gear shafts (21) are corresponding;

two pressing plates (3) are respectively connected to two ends of the pump body (1); each pressing plate (3) is provided with two shaft holes (31), each shaft hole (31) is connected with a sealing shaft sleeve (32), and the sealing shaft sleeves (32) and the corresponding gear shafts (21) are coaxially arranged and used for allowing shaft rods of the corresponding gear shafts (21) to pass through;

the two support plates (4) are respectively connected to the outer ends of the two pressing plates (3); two bearings (41) are arranged on each supporting plate (4), and the two bearings (41) and the corresponding gear shafts (21) are coaxially arranged; the two ends of the shaft lever of the gear shaft (21) are rotatably connected to corresponding bearings (41).

2. The rubber gear pump of claim 1, wherein: the sealing shaft sleeve (32) comprises a first shaft sleeve part (33) and a second shaft sleeve part (34), the first shaft sleeve part (33) is arranged on a corresponding shaft hole (31), the second shaft sleeve part (34) is arranged in the inner cavity (11), and the outer wall of the second shaft sleeve part (34) is attached to the inner wall of the inner cavity (11).

3. The rubber gear pump of claim 1, wherein: and a overflow groove (42) is formed in one side wall, facing the pressing plate (3), of the supporting plate (4), and the overflow groove (42) penetrates through the upper end face and the lower end face of the supporting plate (4) and is enclosed with the corresponding pressing plate (3) to form an overflow channel (43).

4. A rubber gear pump according to claim 3, characterized in that: a plurality of positioning convex blocks (44) are arranged on one side wall of the supporting plate (4) facing the pressing plate (3), positioning grooves (35) are arranged at positions, corresponding to the positioning convex blocks (44), on the pressing plate (3), and the positioning convex blocks (44) are clamped in the corresponding positioning grooves (35).

5. The rubber gear pump of claim 4, wherein: two mounting holes (45) are formed in the supporting plate (4), and the bearings (41) are connected in the corresponding mounting holes (45); the opening of the outer end of the mounting hole (45) is connected with a gland (46), and the gland (46) is used for preventing the bearing (41) from falling out of the mounting hole (45).

6. The rubber gear pump of claim 5, wherein: a sealing ring (47) is further arranged between the gland (46) and the bearing (41).

7. The rubber gear pump of claim 5, wherein: one end of one gear shaft (21) extends to the outer side of the gland (46) and is provided with a transmission tooth (22) for connecting the output end of the transmission unit.