Axial dynamic pressure floating spiral gear pump
By designing axial dynamic pressure floating spiral gear pump in the gear pump, using the power floating lubricant layer and dynamic pressure seal, the existing gear pumps have solved the problems of bearing wear and noise, achieving higher speed and longer life.
Patent Information
- Application Number
- CN202420347731.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-26
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-02-26
AI Technical Summary
During long-term work, existing gear pumps have severe bearing wear, high noise, limited maximum speed, and reduced pump life when pumping highly corrosive liquid, making it inconvenient to use.
A spiral gear pump with axial dynamic pressure floating is designed. By installing the front "8" sleeve and the rear "8" sleeve inside the pump body, the power floating lubricating layer and dynamic pressure seal of medium pressure liquid and high pressure oil is used to reduce axial force and noise.
It effectively reduces bearing wear, reduces noise, increases maximum speed, and extends the life of the pump body, especially when pumping highly corrosive liquids, it is more convenient.
Smart Images
Figure CN222576874U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gear pumps, in particular to an axial dynamic pressure floating spiral gear pump. Background Art
[0002] The gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump chamber and the meshing gears to transport liquid or increase its pressure. It consists of two closed spaces, two gears, a pump body, and front and rear covers. When the gears rotate, the volume of the space on the side where the gears are disengaged changes from small to large, forming a vacuum, sucking the liquid in, and the volume of the space on the side where the gears are meshing changes from large to small, squeezing the liquid into the pipeline; the suction chamber and the discharge chamber are separated by the meshing line of the two gears, and the pressure of the discharge port of the gear pump depends entirely on the size of the resistance at the pump outlet. Existing gear pumps often use bearing fixing to fix the driving gear shaft and the driven gear shaft. The bearing sleeve is severely worn when working for a long time, and the noise generated by the rotation is large. The maximum speed is limited, and the life of the pump body is reduced when pumping highly corrosive liquids, which is inconvenient to use. Utility Model Content
[0003] The utility model aims to provide an axial dynamic pressure floating helical gear pump to solve the problems raised in the above background technology.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: including a pump body, a front cover plate, a rear cover plate, an "O"-shaped sealing ring, a cylindrical pin, a driving gear shaft, a driven gear shaft, a front "8"-shaped sleeve, a rear "8"-shaped sleeve, a shaft sleeve, a lip seal, and an elastic retaining ring for a hole; the front cover plate and the rear cover plate are installed on the front and rear sides of the pump body, and an inlet and outlet are arranged on the left and right sides. The front cover plate is fixed with a cylindrical pin, and the rear cover plate is fixed with screws; an "O"-shaped sealing ring is installed on the inner edge of the connection between the front cover plate and the pump body; two sealing ring grooves are opened on the front side of the rear cover plate, and an "O"-shaped sealing ring is installed in each sealing ring groove; the front "8"-shaped sleeve and the rear "8"-shaped sleeve are respectively installed on the front and rear sides of the pump body, and a front arc-shaped oil groove is symmetrically opened on the upper and lower sides of the circular hole on one side of the end face of the front "8"-shaped sleeve, The front arc-shaped oil groove is connected to the front oil guide groove through the front auxiliary oil groove, and the right side of the circular hole on the end surface of one side of the rear "8"-shaped sleeve is provided with a rear arc-shaped oil groove, and the two sections of the rear arc-shaped oil groove are connected to the right rear oil guide groove through the rear auxiliary oil groove; the driving gear shaft is installed on the upper side of the pump body, and its front shaft section is equipped with a shaft sleeve and passes through the front "8"-shaped sleeve and the front cover plate, and the rear shaft section is equipped with a shaft sleeve and installed in the rear "8"-shaped sleeve, and a circular hole running through the entire shaft section is opened in the center; the driven gear shaft is installed on the lower side of the pump body, and its front and rear shaft sections are equipped with shaft sleeves and installed in the front "8"-shaped sleeve and the rear "8"-shaped sleeve, and a circular hole running through the entire shaft section is opened in the center, and the gear section is meshed with the gear section of the driving gear shaft; the lip seal and the hole elastic retaining ring are installed on the front shaft section of the driving gear shaft, and are located in the front cover plate.
[0005] As a preferred technical solution of the utility model, the sealing ring groove on the rear cover plate has two layers, the outer layer is elliptical, and the inner layer is vertical "ω"-shaped, located on the right side of the central circular hole.
[0006] As a preferred technical solution of the utility model, the angles between the lines connecting the centers of the upper and lower arcs on the left side of the inner layer of the sealing ring groove and the centers of the upper and lower circular holes and the vertical direction are both 45°, and the left half of the right central part is divided into two branches.
[0007] As an optimal technical solution of the utility model, the front arc-shaped oil groove is arranged along the circular hole, and the upper and lower front arc-shaped oil grooves are the same size, the front auxiliary oil grooves are arranged vertically, and the front oil guide grooves are located at the upper and lower edges of the front "8" sleeve.
[0008] As a preferred technical solution of the utility model, the rear arc-shaped oil groove is arranged along the circular hole, and the size of the upper rear arc-shaped oil groove is larger than that of the lower rear arc-shaped oil groove. The rear auxiliary oil grooves are all arranged horizontally, and the rear oil guide groove is divided into two sections, both located at the right edge of the "8" sleeve.
[0009] Compared with the prior art, the utility model has the following beneficial effects: the utility model introduces medium-pressure liquid of the gear pump through the oil grooves on the upper and lower sides of the front "8"-shaped sleeve, forming a dynamic floating lubrication layer at the front cover end of the gear; the high-pressure oil of the gear pump is introduced through the arc-shaped oil groove and the auxiliary oil groove on the rear "8"-shaped sleeve, which is divided into two different areas, pushing the gear shaft to the front side to offset the axial force generated by hydraulic pressure and rotation; the special-shaped sealing ring in the rear end cover can seal the high-pressure oil on the inside, push the rear "8"-shaped sleeve from the rear side, make it fit against the gear, and form a dynamic pressure seal. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a cross-sectional view of the utility model;
[0011] Figure 2 This is the front view of the rear cover of the utility model;
[0012] Figure 3 This is the front view of the "8"-shaped sleeve of the utility model;
[0013] Figure 4 This is the front view of the rear "8" sleeve of the utility model;
[0014] In the figure: pump body 1, front cover plate 2, rear cover plate 3, "O" type sealing ring 4, cylindrical pin 5, driving gear shaft 6, driven gear shaft 7, front "8" sleeve 8, front arc oil groove 801, front auxiliary oil groove 802, front oil guide groove 803, rear "8" sleeve 9, rear arc oil groove 901, rear auxiliary oil groove 902, rear oil guide groove 903, shaft sleeve 10, lip seal 11, elastic retaining ring for hole 12 DETAILED DESCRIPTION
[0015] Example 1
[0016] like Figures 1 to 4As shown, the utility model discloses a helical gear pump with axial dynamic pressure floating, including a pump body 1, a front cover plate 2, a rear cover plate 3, an "O"-shaped sealing ring 4, a cylindrical pin 5, a driving gear shaft 6, a driven gear shaft 7, a front "8"-shaped sleeve 8, a rear "8"-shaped sleeve 9, a shaft sleeve 10, a lip seal 11, and an elastic retaining ring 12 for a hole; the front cover plate 2 and the rear cover plate 3 are installed on the front and rear sides of the pump body 1, and an inlet and outlet are arranged on the left and right sides. The front cover plate 2 is fixed with a cylindrical pin 5, and the rear cover plate 3 is fixed with screws; an "O"-shaped sealing ring 4 is installed on the inner edge of the connection between the front cover plate 2 and the pump body 1; two sealing ring grooves are opened on the front side of the rear cover plate 3, and an "O"-shaped sealing ring 4 is installed in each sealing ring groove; the front "8"-shaped sleeve 8 and the rear "8"-shaped sleeve 9 are respectively installed on the front and rear sides of the pump body 1, and the front "8"-shaped sleeve 8 has a front arc-shaped oil groove 801 symmetrically opened on the upper and lower sides of the circular hole on one side of the end surface, and the front arc The shaped oil groove 801 is connected to the front oil guide groove 803 through the front auxiliary oil groove 802, and the right side of the circular hole on the end surface of the rear "8" sleeve 9 is provided with a rear arc-shaped oil groove 901. The two sections of the rear arc-shaped oil grooves 901 are connected to the right rear oil guide groove 903 through the rear auxiliary oil groove 902; the driving gear shaft 6 is installed on the upper side of the pump body 1, and its front shaft section is equipped with a shaft sleeve 10 and then passes through the front "8" sleeve 8 and the front cover plate 2, and the rear shaft section is equipped with a shaft sleeve 10 for installation In the rear "8" sleeve 9, a circular hole is opened in the center that runs through the entire shaft section; the driven gear shaft 7 is installed on the lower side of the pump body 1, and the shaft sleeves 10 on the front and rear sides are installed in the front "8" sleeve 8 and the rear "8" sleeve 9, and a circular hole is opened in the center that runs through the entire shaft section, and the gear section is meshed with the gear section of the driving gear shaft 6; the lip seal 11 and the hole elastic retaining ring 12 are installed in the front shaft section of the driving gear shaft 6, located in the front cover plate 2. The sealing ring groove on the rear cover plate 3 is an inner and outer layer, the outer side is elliptical, and the inner side is a vertical "ω" shape, located on the right side of the central circular hole, and the inner area of the inner "O" type sealing ring 4 seals the high-pressure oil introduced by the rear 8" sleeve 9, so that the rear 8" sleeve 9 can be pushed from the rear side to fit the gear.
[0017] The working principle of the utility model is as follows: take the pump body 1 as the center, and observe axially from the long axis side of the driving gear shaft 6 as the direction described in this working principle. When the gear pump is started, the external power drives the driving gear shaft 6 to rotate, and the driven gear shaft 7 meshes and rotates with the gear segment of the driving gear shaft 6. The clockwise rotation of the driving gear shaft 6 is recorded as positive rotation. The left side of the pump body 1 is the low-pressure area for oil absorption, and the right side forms the high-pressure area for oil discharge. Both the upper and lower sides are medium-pressure oil; because the gear segments on the driving gear shaft 6 and the driven gear shaft 7 are spiral teeth, they will generate backward axial force due to rotation and meshing, among which the axial force of the driving gear shaft 6 is greater than that of the driven gear shaft 7, and the medium-pressure oil inside the pump body 1 is discharged from the front oil guide groove 803 on the front "8" sleeve 8 The oil enters through the front auxiliary oil groove 802 and the front arc-shaped oil groove 801, forming a dynamic floating lubrication layer on the front end cover 2, and its power will be distributed along the groove to form a diffusion surface, thereby establishing an oil film on the entire end surface; at the same time, the high-pressure oil is introduced from the rear auxiliary oil groove 902, and enters the upper and lower rear arc-shaped oil grooves 901 of different areas respectively. At the same time, the sealing ring on the inner side of the rear end cover 3 can lock the high-pressure oil inside, so that the pressure from the rear side of the rear "8" sleeve 9 is greater than the axial force, and the rear "8" sleeve 9 is pushed forward to fit the gear to form a dynamic pressure seal.
[0018] Although the specific embodiments of the present invention are described in detail above, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention, and modifications or deformations without creative labor are still within the scope of protection of the present invention.
Claims
1. An axial dynamic pressure floating helical gear pump, characterized in that: The pump body (1) comprises a pump body (1), a front cover plate (2), a rear cover plate (3), an "O" type sealing ring (4), a cylindrical pin (5), a driving gear shaft (6), a driven gear shaft (7), a front "8" shaped sleeve (8), a rear "8" shaped sleeve (9), a shaft sleeve (10), a lip seal (11), and a hole elastic retaining ring (12); the front cover plate (2) and the rear cover plate (3) are installed on the front and rear sides of the pump body (1), and the left and right sides are provided with inlets and outlets. The front cover plate (2) is equipped with a cylindrical pin (5) for fixing, and the rear cover plate (3) is fixed with a cylindrical pin (5). The pump body (1) is fixed with screws; an "O"-shaped sealing ring (4) is installed on the inner edge of the connection between the front cover plate (2) and the pump body (1); the front side of the rear cover plate (3) is provided with two sealing ring grooves, each of which is provided with an "O"-shaped sealing ring (4); the front "8"-shaped sleeve (8) and the rear "8"-shaped sleeve (9) are respectively installed on the front and rear sides of the pump body (1); a front arc-shaped oil groove (801) is symmetrically opened on the upper and lower sides of the circular hole on the end surface of one side of the front "8"-shaped sleeve (8), and the front arc-shaped oil groove (801) is passed through The front auxiliary oil groove (802) is connected to the front oil guide groove (803); the right side of the circular hole on the end surface of one side of the rear "8"-shaped sleeve (9) is provided with a rear arc-shaped oil groove (901); the two sections of the rear arc-shaped oil groove (901) are connected to the right rear oil guide groove (903) through the rear auxiliary oil groove (902); the driving gear shaft (6) is installed on the upper side of the pump body (1); the front shaft section thereof is equipped with a shaft sleeve (10) and then passes through the front "8"-shaped sleeve (8) and the front cover plate (2); the rear shaft section is equipped with a shaft sleeve (10) and is installed on the rear The driven gear shaft (7) is installed on the lower side of the pump body (1), and the shaft sleeves (10) on the front and rear sides are installed in the front "8" sleeve (8) and the rear "8" sleeve (9 ...
2. The axial dynamic pressure floating helical gear pump according to claim 1, characterized in that: The sealing ring groove on the rear cover plate (3) has two layers, an inner layer and an outer layer, the outer layer is elliptical, and the inner layer is vertical "ω"-shaped, and is located on the right side of the central circular hole.
3. The axial dynamic pressure floating helical gear pump according to claim 2, characterized in that: The angles between the lines connecting the centers of the upper and lower arcs on the left side of the inner layer of the sealing ring groove and the centers of the upper and lower circular holes and the vertical direction are both 45 degrees, and the left half of the right central part is divided into two branches.
4. The axial dynamic pressure floating helical gear pump according to claim 1, characterized in that: The front arc-shaped oil groove (801) is arranged along the circular hole, and the upper and lower front arc-shaped oil grooves (801) have the same size. The front auxiliary oil grooves (802) are both arranged vertically, and the front oil guide grooves (803) are located at the upper and lower edges of the front "8" sleeve (8).
5. The axial dynamic pressure floating helical gear pump according to claim 1, characterized in that: The rear arc-shaped oil groove (901) is arranged along the circular hole, and the upper rear arc-shaped oil groove (901) is larger than the lower rear arc-shaped oil groove (901). The rear auxiliary oil grooves (902) are all arranged horizontally. The rear oil guide groove (903) is divided into upper and lower sections, both of which are located at the right edge of the "8" sleeve (9).