CN212774747U

CN212774747U - Gear pump

Info

Publication number: CN212774747U
Application number: CN202021108512.7U
Authority: CN
Inventors: 李庆辉
Original assignee: Hebei Paiyi Hydraulic Machinery Co ltd
Current assignee: Hebei Paiyi Hydraulic Machinery Co ltd
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2021-03-23
Anticipated expiration: 2030-06-16

Abstract

The utility model relates to a fluid pump technical field especially relates to a gear pump among hydraulic machine. The oil seal comprises a shell, a driving gear, a driven gear, a first bearing, a second bearing, an oil seal and a lining plate; the shell is provided with a first oil port and a second oil port, the driving gear, the driven gear, the first bearing, the second bearing and the lining plate are arranged in the shell, the shaft head part of the driving gear extends out of the shell, and the oil seal is arranged between the shaft of the driving gear and the shell; be equipped with first bearing on the drive gear, first bearing sets up on the axle at the front portion and the rear portion of drive gear's fluted disc, the second bearing sets up on the axle at driven gear front portion and rear portion, the internal surface setting at casing rear portion is hugged closely to the welt, the welt uses tin-lead bronze bimetallic plate to make.

Description

Gear pump

Technical Field

The utility model relates to a fluid pump technical field especially relates to a gear pump among hydraulic machine.

Background

The gear pump mainly comprises two gears and a shell to form two closed spaces, when the gears rotate, the volume of the space on the gear disengagement side is changed from small to large, negative pressure is generated to absorb liquid, and the volume of the space on the gear engagement side is changed from large to small, so that the liquid is pressed into a pipeline. The suction chamber and the discharge chamber are separated by a meshing line of two gears.

The existing gear pump has little fluid loss in the pump due to the structure and action principle, because the fluid is used for lubricating the bearing and two sides of the gear, and fit clearance exists between two gears and between the gear and the shell, which causes the efficiency reduction of the gear pump.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the technique that exists is not enough to the aforesaid, provides a gear pump, adopts the clearance of tin-lead bronze bimetallic plate bushing compensation inside part and casing.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a gear pump comprises a shell, a driving gear, a driven gear, a first bearing, a second bearing, an oil seal and a lining plate; the shell is provided with a first oil port and a second oil port, the driving gear, the driven gear, the first bearing, the second bearing and the lining plate are arranged in the shell, the driving gear and a shaft of the driving gear are integrally formed, the shaft head part of the driving gear extends out of the shell, and the oil seal is arranged between the shaft of the driving gear and the shell; be equipped with first bearing on the drive gear, first bearing sets up on the axle at the front portion and the rear portion of drive gear's fluted disc, the second bearing sets up on the axle at driven gear front portion and rear portion, the internal surface setting at casing rear portion is hugged closely to the welt, the welt uses tin-lead bronze bimetallic plate to make.

Further optimize this technical scheme, drive gear's spindle nose has the keyway, the keyway is flat keyway or spline groove.

Further optimize this technical scheme, first hydraulic fluid port and second hydraulic fluid port set up the rear portion at the casing, first hydraulic fluid port and second hydraulic fluid port are one for the oil absorption mouth another for the oil-out.

Compared with the prior art, the utility model has the advantages of it is following: 1. the lining plate is arranged in the rear part of the shell, and the structure is favorable for ensuring the floating clearance between the compensation gear, the bearing and the like and the shell; 2. the lining plate is made of a tin-lead-bronze bimetallic plate, the structure is favorable for ensuring that the lining plate cannot deform after being soaked by lubricating oil for a long time, and the tin-lead-bronze bimetallic plate has self-lubricating property and reduces the abrasion of parts.

Drawings

Fig. 1 is a schematic view of the top view structure of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a schematic sectional view taken along the direction a-a in fig. 1.

In the figure: 1. a housing; 2. a drive gear; 3. a first oil port; 4. a second oil port; 6. A driven gear; 7. a first bearing; 8. a second bearing; 10. Oil sealing; 11. a liner plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The specific implementation mode is as follows: referring to fig. 1-3, the gear pump of the present invention comprises a housing 1, a driving gear 2, a driven gear 6, a first bearing 7, a second bearing 8, an oil seal 10 and a lining plate 11; the oil seal comprises a shell 1, a driving gear 2, a driven gear 6, a first bearing 7, a second bearing 8 and a lining plate 11, wherein the shell 1 is provided with a first oil port 3 and a second oil port 4; be equipped with first bearing 7 on drive gear 2, first bearing 7 sets up on the axle at the front portion and the rear portion of drive gear 2's fluted disc, second bearing 8 sets up on the axle at 6 front portions of driven gear and rear portion, the internal surface setting at casing 1 rear portion is hugged closely to welt 11, welt 11 uses tin lead bronze bimetallic plate to make.

As a preferable arrangement, the shaft head of the driving gear 2 is provided with a key groove, and the key groove is a flat key groove or a spline groove.

As a preferable arrangement, the first oil port 3 and the second oil port 4 are disposed at the rear of the housing 1, and one of the first oil port 3 and the second oil port 4 is an oil suction port and the other is an oil outlet.

The utility model discloses a gear pump is preferred to be used bearing, and bearing's coefficient of friction is less than bearing, and transmission efficiency is high, and calorific capacity is few. The fit clearance between the needle bearing and the gear shaft head is small, the machining precision of each part is high, the deformation of the gear under high pressure is small, the tooth top sweeping boring amount is small, and the service life is longer.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. A gear pump characterized by: comprises a shell (1), a driving gear (2), a driven gear (6), a first bearing (7), a second bearing (8), an oil seal (10) and a lining plate (11); the oil seal structure is characterized in that a first oil port (3) and a second oil port (4) are formed in the shell (1), the driving gear (2), the driven gear (6), the first bearing (7), the second bearing (8) and the lining plate (11) are arranged in the shell (1), the driving gear (2) and a shaft of the driving gear (2) are integrally formed, the shaft head part of the driving gear (2) extends out of the shell (1), and the oil seal (10) is arranged between the shaft of the driving gear (2) and the shell (1); be equipped with first bearing (7) on drive gear (2), first bearing (7) set up at the anterior of the fluted disc of drive gear (2) and epaxial at rear portion, second bearing (8) set up at driven gear (6) front portion and epaxial at rear portion, the internal surface setting at casing (1) rear portion is hugged closely in welt (11), welt (11) use tin lead bronze bimetallic plate to make.

2. The gear pump of claim 1, wherein: the shaft head of the driving gear (2) is provided with a key groove which is a flat key groove or a spline groove.

3. The gear pump of claim 1, wherein: the first oil port (3) and the second oil port (4) are arranged at the rear part of the shell (1), and one of the first oil port (3) and the second oil port (4) is an oil suction port while the other is an oil outlet.