CN210484035U

CN210484035U - Gear pump unloading device

Info

Publication number: CN210484035U
Application number: CN201921422201.5U
Authority: CN
Inventors: 陈文明
Original assignee: Suzhou Jinwei Hydraulic Power Equipment Co Ltd
Current assignee: Suzhou Jinwei Hydraulic Power Equipment Co Ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-05-08
Anticipated expiration: 2029-08-29

Abstract

The utility model discloses a gear pump unloading device, including the gear body, a plurality of teeth of a cogwheel of fixedly connected with on the gear body curved surface, it is a plurality of form the tooth root between the teeth of a cogwheel the off-load storehouse has been seted up to the arbitrary terminal surface of gear body, be provided with the rubber bag in the off-load storehouse, oil pipe has been seted up to the tooth root side, it runs through inside the gear body extends to the off-load storehouse to lead to oil pipe to keep away from teeth of a cogwheel one end, it runs through to inside the rubber bag to lead to oil. This product can effectually avoid the trapping phenomenon of oil, the effectual gear that has protected simultaneously, makes the gear can not cause the injury because of trapping the oil phenomenon, and this product off-load effect is obvious, and is not high to requirements such as gear size, and the data precision requires also not high, and slight data change does not influence the off-load effect.

Description

Gear pump unloading device

Technical Field

The utility model relates to a gear pump makes technical field, especially relates to a gear pump unloading device.

Background

Gear pumps are rotary pumps that deliver or pressurize fluid by virtue of the change in working volume and movement created between a pump cylinder and a meshing gear. Two gears, pump body and front and back covers form two closed spaces, when the gears rotate, the space on the gear disengagement side becomes larger from smaller to larger to form vacuum to suck liquid, and the space on the gear engagement side becomes smaller from larger to smaller to squeeze liquid into the pipeline. The suction chamber and the discharge chamber are separated by a meshing line of two gears. The pressure at the discharge port of the gear pump is completely dependent on the amount of resistance at the pump outlet, and for a gear pump to work smoothly, the overlap factor of the meshing of the gears must be greater than 1, i.e., there are always two pairs of gears meshing simultaneously. This results in a portion of the oil being trapped in the enclosed cavity formed by the two pairs of gears. The closed volume is first gradually reduced with the rotation of the gear and then gradually increased. The reduction of the closed volume can cause the trapped oil to be squeezed to generate high pressure and flow out of the gap, so that the oil is heated, and the parts such as bearings and the like are also subjected to additional unbalanced load. The increase in enclosed volume can in turn create a partial vacuum, cavitation of the oil, causing noise, vibration and cavitation. This is an oil trapping phenomenon of the gear pump.

In the traditional technology, an unloading groove is usually adopted for unloading, but the position depth and other data of the unloading groove are complex and tedious to calculate, the required precision is high, the rejection rate in the manufacturing process is high, and the use of the unloading groove can be influenced by a little change of gear parameters in the later use process.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a gear pump unloading device.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a gear pump unloading device, includes the gear body, a plurality of teeth of a cogwheel of fixedly connected with on the gear body curved surface, it is a plurality of form the tooth root between the teeth of a cogwheel the unloading storehouse has been seted up to the arbitrary terminal surface of gear body, be provided with the rubber bag in the unloading storehouse, oil pipe has been seted up to the tooth root side, oil pipe keeps away from teeth of a cogwheel one end and runs through inside the gear body extends to the unloading storehouse, oil pipe runs through to the inside part in unloading storehouse and runs through to inside the.

As a further description of the above technical solution:

the gear body terminal surface is located off-load storehouse open position and is provided with the cang gai, a plurality of fixed screw holes have been seted up at the gear body top that is located off-load storehouse open position, cang gai fixed orifices position and fixed screw hole block are fixed with the bolt, the storehouse is covered up end and gear body terminal surface parallel and level.

As a further description of the above technical solution:

and the center positions of the two parallel end surfaces of the gear body are provided with shaft pin holes in a penetrating way.

As a further description of the above technical solution:

the unloading bin is positioned in the middle between the tooth root and the shaft pin hole on the gear body.

As a further description of the above technical solution:

the gear body is made of cast steel.

As a further description of the above technical solution:

and a sealing gasket is fixedly connected between the bin cover and the gear body.

The utility model discloses following beneficial effect has:

the utility model discloses a set up the off-load storehouse, when gear engagement made the interior volume of oil district when producing the oily phenomenon of drowning and making reduce increase oil district pressure, pressure can make unnecessary fluid get into the rubber bag in the off-load storehouse from leading to oil pipe, make the gear pump can not appear the oily phenomenon of drowning at the operation in-process, avoid producing the cavitation, the noise, the vibration, the phenomenon that the metal surface denudates, fluid has also been avoided generating heat, the phenomenon of bearing wearing and tearing, because the elasticity of rubber bag when the fluid in the rubber bag is accumulated to collect together too much, can get rid of fluid from the logical oil pipe at non-meshing position.

This product can effectually avoid the trapping phenomenon of oil, the effectual gear that has protected simultaneously, makes the gear can not cause the injury because of trapping the oil phenomenon, and this product off-load effect is obvious, and is not high to requirements such as gear size, and the data precision requires also not high, and slight data change does not influence the off-load effect.

Drawings

Fig. 1 is a structural diagram of a gear pump unloading device provided by the utility model;

fig. 2 is a front view of a gear pump unloading device provided by the present invention;

fig. 3 is a cross-sectional view of the gear pump unloading device provided by the utility model.

Illustration of the drawings:

1. a shaft pin hole; 2. gear teeth; 3. a tooth root; 4. a bin cover; 5. a gear body; 6. an oil pipe is communicated; 7. a rubber bladder; 8. fixing the threaded hole; 9. and (7) unloading the bin.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, the present invention provides an embodiment: the utility model provides a gear pump unloading device, includes gear body 5, and fixedly connected with a plurality of teeth of a cogwheel 2 on the 5 curved surfaces of gear body, forms 3 arbitrary terminal surfaces of gear body in the tooth root between a plurality of teeth of a cogwheel 2 and has seted up off-load storehouse 9, is provided with rubber bag 7 in the off-load storehouse 9, and logical oil pipe 6 has been seted up to 3 sides in the tooth root, and logical oil pipe 6 keeps away from 2 one end of the teeth of a cogwheel and runs through gear body 5 and extend to inside the off-load storehouse 9, and logical oil pipe 6 runs through.

Gear body 5 terminal surface is located 9 open position in off-load storehouse and is provided with cover 4, and gear body 5 is located 9 open position in off-load storehouse and has seted up a plurality of fixed screw hole 8 at the top, and 4 fixed hole positions in cover are fixed with fixed screw hole 8 block and with the bolt fastening, and 4 up end in cover and 5 terminal surface parallel and level in the gear body avoid cover 4 to be higher than 5 surfaces in the gear body or be less than 5 surfaces in the gear body and cause the influence to gear pump normal operating. The central positions of two parallel end surfaces of the gear body 5 are provided with shaft pin holes 1 in a penetrating way, so that the gear body 5 is conveniently and fixedly connected with a shaft. The unloading bin 9 is positioned in the middle between the gear root 3 and the shaft pin hole 1 on the gear body 5. The gear body 5 is made of cast steel, and the cast steel has high strength, so that the gear body 5 is prevented from being easily deformed due to the reduction of the strength of the unloading bin 9. A sealing washer is fixedly connected between the bin cover 4 and the gear body 5, so that oil is prevented from entering the unloading bin 9 from a gap between the bin cover 4 and the gear body 5.

The working principle is as follows: the staff covers storehouse lid 4 and screws up with the bolt, fix gear body 5 on the axle through axle pinhole 1, in the gear pump operation process, produce sealed oil district area when the meshing of the teeth of a cogwheel 2 on two gear bodies 5, increase the pressure in the oil district, make the fluid in the oil district get into rubber bag 7 in the off-load storehouse 9 along leading to oil pipe 6 in, the emergence of the oil trapping phenomenon of successful having avoided, can expand when the fluid accumulates to a certain extent in rubber bag 7, because rubber has elasticity, can discharge the oil pipe 6 of the fluid worker non-meshing district in rubber bag 7.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a gear pump unloading device, includes gear body (5), its characterized in that: fixedly connected with a plurality of teeth of a cogwheel (2) on gear body (5) curved surface, it is a plurality of form tooth root (3) between the teeth of a cogwheel (2) unloading storehouse (9) have been seted up to gear body (5) arbitrary terminal surface, be provided with rubber bag (7) in unloading storehouse (9), oil pipe (6) have been seted up to tooth root (3) side, it runs through gear body (5) and extends to inside unloading storehouse (9) to lead to oil pipe (6), it runs through to inside part of unloading storehouse (9) to lead to oil pipe (6) and runs through to inside rubber bag (7).

2. A gear pump unloading device according to claim 1, wherein: gear body (5) terminal surface is located off-load storehouse (9) open position and is provided with cang gai (4), a plurality of fixed screw hole (8) have been seted up at gear body (5) top that is located off-load storehouse (9) open position, cang gai (4) fixed orifices position and fixed screw hole (8) block are fixed with the bolt, cang gai (4) up end and gear body (5) terminal surface parallel and level.

3. A gear pump unloading device according to claim 1, wherein: the central positions of two parallel end surfaces of the gear body (5) are provided with shaft pin holes (1) in a penetrating way.

4. A gear pump unloading device according to claim 1 or 3, wherein: the unloading bin (9) is positioned in the middle between the tooth root (3) and the shaft pin hole (1) on the gear body (5).

5. A gear pump unloading device according to claim 1, wherein: the gear body (5) is made of cast steel.

6. A gear pump unloading device according to claim 2, wherein: and a sealing gasket is fixedly connected between the bin cover (4) and the gear body (5).