CN117267125A - Double-stage high-pressure gear hydraulic pump - Google Patents

Abstract

The invention discloses a two-stage high-pressure gear hydraulic pump, which includes a first pump body, a connecting frame, a second pump body, a front cover, a rear cover, a sealing ring, a first pump body driving gear shaft, and a first pump body. Driven gear shaft, second pump body driving gear shaft, second pump body driven gear shaft, spline shaft, first splayed sleeve, second splayed sleeve, sliding bearing, rotary seal, hole retaining ring, third A floating sealing ring and a second floating sealing ring. The invention connects the secondary gear shaft through a spline shaft, and pumps high-pressure oil through the secondary booster pump. It is suitable for high-pressure environments and improves work efficiency. The gear shaft is fixed with a splayed sleeve to form an oil film between the gear shafts to reduce friction. Radial compensation is performed through floating sealing rings to reduce overall noise and adapt to higher speeds.

Description

A two-stage high-pressure gear hydraulic pump

Technical field

The invention relates to the technical field of gear pumps, specifically a two-stage high-pressure gear hydraulic pump.

Background technique

A gear pump is a rotary pump that relies on the change and movement of the working volume between the pump cylinder and the meshing gear to transport liquid or pressurize it. Two closed spaces are composed of two gears, the pump body and the front and rear covers. When the gears rotate, the volume of the space on the gear disengagement side increases from small to large, forming a vacuum, which sucks the liquid in, and the volume of the space on the gear meshing side changes from large to large. Small, the liquid is squeezed into the pipeline; the suction chamber and the discharge chamber are separated by the meshing line of the two gears. The pressure at the discharge port of the gear pump completely depends on the resistance at the pump outlet. The working pressure of existing gear pumps is often relatively fixed and cannot be applied to high-pressure environments. Replacing them with conventional gear pumps has low working efficiency and is inconvenient to use.

Contents of the invention

The purpose of the present invention is to provide a two-stage high-pressure gear hydraulic pump to solve the problems raised in the above background art.

In order to achieve the above object, the present invention provides the following technical solution: including a first pump body, a connecting frame, a second pump body, a front cover, a rear cover, a sealing ring, a first pump body driving gear shaft, a first pump body from Moving gear shaft, second pump body driving gear shaft, second pump body driven gear shaft, spline shaft, first splayed sleeve, second splayed sleeve, sliding bearing, rotary seal, hole retaining ring, first Floating sealing ring, second floating sealing ring; the first pump body and the second pump body have the same structure, and are equipped with a pair of first eight-shaped sleeves and a second eight-shaped sleeve inside. The first pump body and the second The pump body is installed on the left and right ends of the connecting frame respectively, and is equipped with a sealing ring seal; the front cover is installed on the left side of the first pump body, and is equipped with a sealing ring seal; the back cover is installed on the second pump body On the right side, it is equipped with a sealing ring; the first pump body driving gear shaft is installed on the upper side inside the first pump body, its left shaft section passes through the first eight-shaped sleeve and the front cover, and the right shaft section It extends through the second splayed sleeve into the connecting frame; the second pump body driving gear shaft is installed on the lower side inside the first pump body, and its left and right side shaft segments are located in the first splayed sleeve and the second splayed sleeve. , its gear section meshes with the gear section of the first pump body driving gear shaft; the second pump body driving gear shaft is installed on the upper side inside the second pump body, and its left shaft section extends through the first eight-shaped sleeve and is connected In the frame, the right shaft section is located in the second eight-shaped sleeve; the driven gear shaft of the second pump body is installed on the lower side inside the second pump body, and its left and right shaft sections are located in the first eight-shaped sleeve and the second eight-shaped sleeve. In the sleeve, its gear section meshes with the gear section of the driving gear shaft of the second pump body; between the second splayed sleeve in the first pump body and the connecting frame and between the second splayed sleeve in the second pump body and the rear cover Both are equipped with a set of first floating sealing rings and second floating sealing rings for sealing; the left shaft section of the first pump body driving gear shaft is equipped with a sliding bearing, which is located in the front cover, with its left end Equipped with a set of rotary seals and holes with retaining rings for sealing.

As a preferred technical solution of the present invention, the outer surfaces of the right shaft section of the driven gear shaft of the first pump body and the left shaft section of the driving gear shaft of the second pump body both have protrusions that match the spline shaft.

As a preferred technical solution of the present invention, the first pump body driving gear shaft, the first pump body driven gear shaft, the second pump body driving gear shaft, and the second pump body driven gear shaft gear segments are all spiral tooth.

As a preferred technical solution of the present invention, the first eight-character set and the second eight-figure set are symmetrically slotted and installed symmetrically left and right.

As a preferred technical solution of the present invention, a liquid inlet is provided on the rear side of the first pump body; a pressure relief port is provided on the rear side of the connecting frame; and a liquid outlet is provided on the front side of the second pump body.

Compared with the existing technology, the beneficial effects of the present invention are: the present invention connects the secondary gear shaft through a spline shaft, and pumps high-pressure oil through the secondary booster, which is suitable for high-pressure environments and improves work efficiency.

Description of the drawings

Figure 1 is a cross-sectional view of the present invention

Figure 2 is a front view of the present invention;

Figure 3 is a rear view of the present invention;

Figure 4 is a schematic diagram of the sealing structure of the figure-eight sleeve of the present invention;

Figure 5 is a schematic diagram of the first pump body driving gear shaft seal of the present invention;

In the figure: first pump body 1, connecting frame 2, second pump body 3, front cover 4, rear cover 5, sealing ring 6, first pump body driving gear shaft 7, first pump body driven gear shaft 8. Second pump body driving gear shaft 9, second pump body driven gear shaft 10, spline shaft 11, first splayed sleeve 12, second splayed sleeve 13, sliding bearing 14, rotary seal 15, hole for Back-up ring 16, first floating sealing ring 17, second floating sealing ring 18

Detailed ways

Example 1

As shown in Figures 1 to 5, the present invention discloses a two-stage high-pressure gear hydraulic pump, which includes a first pump body 1, a connecting frame 2, a second pump body 3, a front cover 4, a rear cover 5, a seal Circle 6, first pump body driving gear shaft 7, first pump body driven gear shaft 8, second pump body driving gear shaft 9, second pump body driven gear shaft 10, spline shaft 11, first figure eight sleeve 12, second figure-eight sleeve 13, sliding bearing 14, rotary seal 15, hole retaining ring 16, first floating sealing ring 17, second floating sealing ring 18; the first pump body 1 and the second pump body 3 have the same structure, and are equipped with a pair of first eight-shaped sleeves 12 and second eight-shaped sleeves 13 inside. The first pump body 1 and the second pump body 3 are respectively installed on the left and right ends of the connecting frame 2 and equipped with seals. The front cover 4 is installed on the left side of the first pump body 1 and is equipped with a sealing ring 6 for sealing; the back cover 5 is installed on the right side of the second pump body 3 and is equipped with a sealing ring 6 Sealing; the first pump body driving gear shaft 7 is installed on the upper side of the first pump body 1, its left shaft section passes through the first eight-shaped sleeve 12 and the front cover 4, and the right shaft section passes through the second The splay sleeve 13 extends into the connecting frame 2; the second pump body driving gear shaft 9 is installed on the lower side of the first pump body 1, and its left and right shaft sections are located in the first splay sleeve 12 and the second splay sleeve. In the sleeve 13, its gear segment meshes with the gear segment of the first pump body driving gear shaft 7; the second pump body driving gear shaft 9 is installed on the upper side of the second pump body 3, and its left shaft segment passes through the first pump body driving gear shaft 7. The splayed sleeve 12 extends into the connecting frame 2, and the right shaft section is located in the second splayed sleeve 13; the second pump body driven gear shaft 10 is installed on the lower side of the second pump body 3, with its left and right sides The shaft segment is located in the first splayed sleeve 12 and the second splayed sleeve 13, and its gear segment meshes with the gear segment of the second pump body driving gear shaft 9; the second splayed sleeve 13 in the first pump body 1 is connected with A set of first floating sealing rings 17 and second floating sealing rings 18 are installed between the frames 2 and between the second splayed sleeve 13 and the back cover 5 in the second pump body 3 for sealing; the first pump The left shaft section of the body driving gear shaft 7 is equipped with a sliding bearing 14. The sliding bearing 14 is located in the front cover 4. Its left end is equipped with a set of rotary seals 15 and the hole is sealed with a retaining ring 16. The entire pump body is divided into two parts. Low-pressure oil enters from the rear inlet of the first pump body 1. After increasing once, it is sent from the internal oil circuit to the second pump body 3 and is further pressurized. After obtaining high-pressure oil, Then it is discharged from the outlet on the front side for use by other equipment.

The working principle of the present invention is as follows: when the present invention works, the pressure relief port on the rear side of the connecting frame 2 is first sealed, and then the low-pressure oil is sent from the rear side of the first pump body 1, and the external power source drives the driving gear shaft of the first pump body 7 rotates, and drives the second pump body driving gear shaft 9 to rotate through the spline shaft 11. After the oil enters the first pump body 1, it passes through the first pump body driving gear shaft 7 and the first pump body driven gear shaft 8 The meshing rotation performs the first pressurization. After the pressurization is completed, it is sent to the connecting frame 2, and is sent from the oil circuit inside the connecting frame 2 to the second pump body 3, and passes through the second pump body driving gear shaft 9 and the second pump body. The driven gear shaft 10 is then pressurized for the second time, and after the pressurization, the secondary pressurized high-pressure oil is sent out from the outlet on the front side.

The invention connects the secondary gear shaft through a spline shaft, and pumps out high-pressure oil through the secondary booster pump, which is suitable for high-pressure environments and improves work efficiency; the two sets of gear shafts are fixed by using a figure-eight sleeve, and an oil film is formed between the rotating shafts, reducing the In case of transmission wear and eccentricity, the dynamic pressure of the rotating shaft is floating, which reduces the overall noise and can adapt to higher speeds; at the same time, a floating sealing ring is set on the figure-eight sleeve for radial compensation.

Although specific embodiments of the present invention have been described in detail above, the present invention is not limited to the above-mentioned embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various modifications can be made without departing from the spirit of the present invention. Such changes, modifications or deformations without creative efforts are still within the protection scope of the present invention.

Claims (5)

1. A two-stage high-pressure gear hydraulic pump, characterized in that: the novel hydraulic pump comprises a first pump body (1), a connecting frame (2), a second pump body (3), a front cover plate (4), a rear cover plate (5), a sealing ring (6), a first pump body driving gear shaft (7), a first pump body driven gear shaft (8), a second pump body driving gear shaft (9), a second pump body driven gear shaft (10), a spline shaft (11), a first splayed sleeve (12), a second splayed sleeve (13), a sliding bearing (14), a rotary seal (15), a hole retainer ring (16), a first floating sealing ring (17) and a second floating sealing ring (18); the structure of the first pump body (1) is the same as that of the second pump body (3), a pair of first splayed sleeves (12) and a pair of second splayed sleeves (13) are respectively assembled in the first pump body (1) and the second pump body (3) and are respectively installed at the left end and the right end of the connecting frame (2) and are sealed by assembling sealing rings (6); the front cover plate (4) is arranged on the left side of the first pump body (1) and is matched with the sealing ring (6) for sealing; the rear cover plate (5) is arranged on the right side of the second pump body (3) and is matched with the sealing ring (6) for sealing; the first pump body driving gear shaft (7) is arranged at the upper side in the first pump body (1), the left shaft section of the first pump body driving gear shaft passes through the first splayed sleeve (12) and the front cover plate (4), and the right shaft section of the first pump body driving gear shaft passes through the second splayed sleeve (13) and stretches into the connecting frame (2); the second pump body driving gear shaft (9) is arranged at the lower side in the first pump body (1), the shaft sections at the left side and the right side of the second pump body driving gear shaft are positioned in the first splayed sleeve (12) and the second splayed sleeve (13), and the gear sections of the second pump body driving gear shaft are meshed with the gear sections of the first pump body driving gear shaft (7); the second pump body driving gear shaft (9) is arranged at the upper side in the second pump body (3), the left shaft section of the second pump body driving gear shaft penetrates through the first splayed sleeve (12) and stretches into the connecting frame (2), and the right shaft section of the second pump body driving gear shaft is positioned in the second splayed sleeve (13); the driven gear shaft (10) of the second pump body is arranged at the lower side in the second pump body (3), the shaft sections at the left side and the right side of the driven gear shaft are positioned in the first splayed sleeve (12) and the second splayed sleeve (13), and the gear section of the driven gear shaft is meshed with the gear section of the driving gear shaft (9) of the second pump body; a group of first floating sealing rings (17) and second floating sealing rings (18) are respectively assembled between the second splayed sleeve (13) in the first pump body (1) and the connecting frame (2) and between the second splayed sleeve (13) in the second pump body (3) and the rear cover plate (5) for sealing; the left shaft section of the first pump body driving gear shaft (7) is provided with a sliding bearing (14), the sliding bearing (14) is positioned in the front cover plate (4), and the left end of the sliding bearing is provided with a group of rotary seals (15) and hole check rings (16) for sealing.

2. The dual stage high pressure gear hydraulic pump of claim 1, wherein: the outer surfaces of the right shaft section of the first pump body driven gear shaft (8) and the left shaft section of the second pump body driving gear shaft (9) are provided with bulges matched with the spline shaft (11).

3. The dual stage high pressure gear hydraulic pump of claim 1, wherein: the gear sections of the first pump body driving gear shaft (7), the first pump body driven gear shaft (8), the second pump body driving gear shaft (9) and the second pump body driven gear shaft (10) are spiral teeth.

4. The dual stage high pressure gear hydraulic pump of claim 1, wherein: the first splayed sleeve (12) and the second splayed sleeve (13) are symmetrically grooved and are symmetrically installed left and right.

5. The dual stage high pressure gear hydraulic pump of claim 1, wherein: the rear side of the first pump body (1) is provided with a liquid inlet; the rear side of the connecting frame (2) is provided with a pressure relief opening; the front side of the second pump body (3) is provided with a liquid outlet.