CN201606243U - New high pressure gear pump - Google Patents

Abstract

The utility model relates to a new type of high-pressure gear pump, which comprises a casing, a driving gear arranged in the casing and a driven gear meshed with the driving gear. The covers are joined in one piece by stud bolts passing through the rear end cover. The utility model adopts a two-piece shell structure, which enhances the strength of the shell, reduces the high-pressure deformation of the shell, shortens the length of the fastener, and effectively reduces oil leakage; cancels the positioning of the positioning pin and optimizes the processing The technology adopts the eccentric positioning device to ensure the radial uniform sweeping of the oil pump; the high-pressure area is reduced, and the compensation of the medium-pressure area is increased to reduce the radial unbalanced force.

Description

New high pressure gear pump

technical field

The utility model relates to a novel high-pressure gear pump, which belongs to the field of hydraulic pumps.

Background technique

At present, the housing of most hydraulic pumps is composed of three parts: the front cover, the pump body and the rear cover. Since the front cover and the pump body are independent parts, this not only reduces the overall strength and stiffness of the hydraulic pump, but also finds that most pumps The vulnerable part is the weak link between the bolt hole that runs through the pump body and the gear chamber of the pump body. In addition, the positioning of the gear shaft in the pump body adopts the positioning pin method, which increases the difficulty of processing and affects the production efficiency.

Contents of the invention

The purpose of this utility model is to provide a new type of high-pressure gear pump, the oil pump has enhanced the strength of the shell, and ensured the coaxial precision of the support hole and the gear chamber, reduced the radial unbalanced force on the gear shaft, and made the pump The output pressure is stable and the service life is increased.

The utility model is characterized in that: a new type of high-pressure gear pump, including a casing, a driving gear arranged in the casing and a driven gear meshing with the driving gear, characterized in that: the casing is composed of a body with a front cover It is integrated with the rear end cover through the single head bolt passing through the rear end cover.

The advantages of the utility model: the utility model reduces oil leakage, increases the strength of the pump body, reduces the radial unbalanced force on the gear shaft, increases the service life of the bearing and stabilizes the working pressure.

Description of drawings

Fig. 1 is a schematic diagram of the internal structure of the utility model.

Fig. 2 is the body structure diagram of the utility model.

Fig. 3 is a schematic diagram of the structure of the inner surface of the floating side plate of the utility model.

Fig. 4 is a schematic diagram of the structure of the outer surface of the floating side plate of the utility model.

Detailed ways

Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, a new type of high-pressure gear pump includes a casing, a driving gear (3) inside the casing and a driven gear (4) meshing with the driving gear. The casing is composed of a body (1) with a front end cover and a rear end cover (2) connected into one body through a single head bolt passing through the rear end cover.

The driving gear shaft (5) with the driving gear (3) and the driven gear shaft with the driven gear (4) are installed on the front and rear sides of the casing cavity through the bearings (6) at both ends respectively, and then through the bearing sleeve (7) In the bearing sleeve hole (8), the front side of the rear bearing sleeve (7-1) is installed in the bearing sleeve hole of the body (1), and the other half (7-2) is installed in the rear end cover (2) In the bearing housing hole.

There is an 8-shaped floating side plate (9) between the active and passive meshing gears and the bearing sleeve (7), and the floating side plate (9) is provided with a useful On the 3-shaped oil groove (10) where the sealing ring (13) and the outer baffle (14) of the sealing ring are installed, a high-pressure oil through hole leading to the sealing oil groove (10) is provided on the inner surface (9-2) close to the gear (11), the upper and lower sides of the inner surface (9-2) are respectively provided with pressure oil self-balancing channels (12).

A pair of skeleton oil seals (15) are installed at the front end of the driving gear. Groove 1 (16) and groove 2 (17) respectively introduce the oil for lubricating the bearing into the oil suction port so that the lubricating oil can form backflow.

A pair of skeleton oil seals (15) are installed on the front end of the driving gear (3), and grooves (16) and (17) connecting to the oil suction port are opened at the installation positions of the skeleton oil seals (15).

Threaded holes parallel to the gear shaft are evenly distributed on the periphery of the end surface adjacent to the body and the rear end cover.

Claims (5)

1. novel high-pressure gear pump, the driven gear that comprises casing and be located at the driving gear in the engine housing and mesh with driving gear is characterized in that: the single ended bolt of end cap linked into an integrated entity after described casing was worn long by body with front cover and rear end cover.

2. novel high-pressure gear pump according to claim 1, it is characterized in that: the driven gear shaft that has the driving gear shaft of driving gear and have a driven gear respectively through after the bearings at both ends again before and after bearing housing is installed in the casing die cavity in the side bearing block set hole, described rear axle bearing sleeve front side portion is installed in the axis bearing sleeve seat hole, and second half is installed in the bearing block set hole of rear end cover.

3. novel high-pressure gear pump according to claim 1, it is characterized in that: be provided with 8 font floating side plates between main passive engaging gear and the bearing housing, described floating side plate is provided with 3 shaped oil grooves that are used to install seal ring and seal ring external baffle near the outer side surface of bearing housing, inner side surface near gear is provided with the high pressure oil through hole that leads to the sealing oil groove, and the upper and lower sides of described inner side surface offers pressure oil self balancing conduit respectively.

4. novel high-pressure gear pump according to claim 1 is characterized in that: the front end of described driving gear is equipped with a pair of outside framework oil seal, and the installed position of outside framework oil seal offers the groove that is communicated with inlet port.

5. novel high-pressure gear pump according to claim 1 and 2 is characterized in that: be evenly equipped with the tapped hole that parallels with gear shaft on the perimembranous of described body and rear end cover adjacent face.

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