A gear pump with axial positioning of rolling bearings

Abstract

The present invention discloses a gear pump with axially positioned rolling bearings, comprising a pump body, a driving gear shaft, a driven gear shaft, a friction plate, a bearing bracket, a rolling bearing, a bearing adjustment washer, a front bracket, a mechanical seal chamber, a mechanical seal, a rear bracket, a bearing gland, a clamping nut, an adjusting bolt, and a rear sealing cover. The present invention has the following beneficial effects: the rolling bearing is fixed by the bearing adjustment washer on the left side, and the rolling bearing is fixed by rotating the adjusting bolt on the right side to squeeze the bearing gland. On the basis of fixing the driving gear shaft and the driven gear shaft, a certain gap is maintained between the gear segments of the two shafts and the friction plate, and the axial force exerted on the two shafts is transferred to the rolling bearings. When the rolling bearings are worn, the two shafts can be further fixed by the adjusting bolts, so that the two shafts are in a relatively fixed state, thereby improving the service life of the pump body.

Description

Technical Field

[0001] The present invention relates to the technical field of gear pumps, in particular to a gear pump with axially positioned rolling bearings. Background Art

[0002] A gear pump is a rotary pump that transfers liquids or increases pressure by utilizing the changes in working volume and movement between the pump cylinder and meshing gears. Two gears, a pump body, and front and rear covers form two enclosed chambers. As the gears rotate, the volume of the chamber on the disengaged side expands, creating a vacuum that draws the liquid in. The volume of the chamber on the meshing side decreases, squeezing the liquid into the pipeline. The suction and discharge chambers are separated by the meshing line of the two gears. The pressure at the discharge port of a gear pump is entirely dependent on the resistance at the pump outlet. Common gear pumps often rely on friction plates on the left and right sides of the pump body to absorb the axial force of the gear segments. If the pump is not properly lubricated, mechanical wear can occur, causing the gear shaft to loosen and shortening the pump's service life. Summary of the Invention

[0003] The object of the present invention is to provide a gear pump with axially positioned rolling bearings to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: comprising a pump body, a driving gear shaft, a driven gear shaft, a friction plate, a bearing bracket, a rolling bearing, a bearing adjustment washer, a front bracket, a machine seal chamber, a mechanical seal, a rear bracket, a bearing gland, a clamping nut, an adjusting bolt, and a rear seal; the front bracket is mounted on the left side of the pump body; the rear bracket is mounted on the right side of the pump body; the machine seal chamber is mounted on the left side of the front bracket; the rear seal is mounted on the right side of the rear bracket; the driving gear shaft gear segment is mounted on the upper side inside the pump body; the driven gear shaft gear segment is mounted on the lower side inside the pump body and meshes with the driving gear shaft gear segment; the friction plates are mounted on the left and right sides of the pump body; the bearing bracket is mounted inside the friction plates ; The rolling bearing is installed on the two side shaft sections of the driving gear shaft and the driven gear shaft, and is located in the front bracket and the rear bracket; the bearing adjustment washer is installed on the left shaft section of the driving gear shaft and the driven gear shaft, and is located in the front bracket; the bearing adjustment washer fills the gap between the rolling bearing and the front bracket, so that there is a gap between the gear sections of the driving gear shaft and the driven gear shaft and the friction plate, and the axial force exerted on the driving gear shaft and the driven gear shaft is borne by the rolling bearing; the mechanical seal is installed on the left shaft section of the driving gear shaft, and is located in the mechanical seal cavity; the bearing pressure cover is installed in the rear bracket and pressed on the right end face of the rolling bearing; the adjusting bolt passes through the rear bracket and is pressed on the bearing pressure cover, and is equipped with a locking nut to lock it.

[0005] As a preferred technical solution of the present invention, there are four friction plates in total, which are respectively located between the driving gear shaft, the driven gear shaft gear segments and the front bracket, and the rear bracket when installed.

[0006] As a preferred technical solution of the present invention, the bearing brackets are composed of four pieces, which are located between the driving gear shaft, the driven gear shaft gear segments and the rolling bearings when installed.

[0007] As a preferred technical solution of the present invention, the left and right shaft sections of the driving gear shaft and the driven gear shaft are each provided with a plurality of rolling bearings side by side, and the bearing adjustment washers and the bearing pressure covers are each two pieces.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention fixes the rolling bearing by the bearing adjustment washer on the left side, and fixes the rolling bearing by rotating the adjusting bolt on the right side to squeeze the bearing cover. On the basis of fixing the driving gear shaft and the driven gear shaft, the gap between the gear segments and the friction plates of the two shafts is maintained, and the axial force exerted on the two shafts is transferred to the rolling bearings. When the rolling bearings are worn, the two shafts can continue to be fixed by the adjusting bolts, so that the two shafts are in a relatively fixed state, thereby improving the service life of the pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0010] Figure 2 A top view of the present invention;

[0011] Figure 3 It is a cross-sectional view of the present invention;

[0012] In the figure: pump body 1, driving gear shaft 2, driven gear shaft 3, friction plate 4, bearing bracket 5, rolling bearing 6, bearing adjustment washer 7, front bracket 8, machine seal chamber 9, mechanical seal 10, rear bracket 11, bearing gland 12, clamping nut 13, adjusting bolt 14, rear seal 15. DETAILED DESCRIPTION

[0013] Example 1

[0014] like Figures 1 to 3As shown, the present invention discloses a gear pump with axial positioning of rolling bearings, including a pump body 1, a driving gear shaft 2, a driven gear shaft 3, a friction plate 4, a bearing bracket 5, a rolling bearing 6, a bearing adjustment washer 7, a front bracket 8, a machine seal chamber 9, a mechanical seal 10, a rear bracket 11, a bearing gland 12, a pressing nut 13, an adjusting bolt 14, and a rear cover 15; the front bracket 8 is mounted on the left side of the pump body 1; the rear bracket 11 is mounted on the right side of the pump body 1; the machine seal chamber 9 is mounted on the left side of the front bracket 8; the rear cover 15 is mounted on the right side of the rear bracket 11; the gear segment of the driving gear shaft 2 is mounted on the upper side of the interior of the pump body 1; the gear segment of the driven gear shaft 3 is mounted on the lower side of the interior of the pump body 1 The pump body 1 has a plurality of roller bearings 6 arranged side by side, meshing with the gear segments of the driving gear shaft 2. The friction plates 4 are mounted on the left and right sides of the pump body 1. The bearing brackets 5 are mounted within the friction plates 4. The rolling bearings 6 are mounted on the two side shaft segments of the driving gear shaft 2 and the driven gear shaft 3, located within the front bracket 8 and the rear bracket 11. The bearing adjustment washers 7 are mounted on the left side shaft segments of the driving gear shaft 2 and the driven gear shaft 3, located within the front bracket 8. The mechanical seal 10 is mounted on the left side shaft segment of the driving gear shaft 2, located within the mechanical seal chamber 9. The bearing gland 12 is mounted within the rear bracket 11, pressing against the right end face of the rolling bearing 6. The adjusting bolts 14 pass through the rear bracket 11, press against the bearing gland 12, and are fitted with compression nuts 13 for locking. Several rolling bearings 6 are arranged side by side on the left and right shaft segments of the driving gear shaft 2 and the driven gear shaft 3. The left side is fixed by the bearing adjustment washers 7, and the right side is fixed by the adjusting bolts 14 squeezing the bearing gland 12, thereby fixing the driving gear shaft 2 and the driven gear shaft 3 to prevent friction between their gear segments and the friction plates 4.

[0015] The working principle of the present invention is as follows: When designing the present invention, the rolling bearing 6 is arranged on the outside of the pump body 1, and the bearing bracket 5 is arranged in the friction plate 4. The bearing adjustment washer 7 is used to fix the rolling bearing 6 on the left side, and the bearing pressure cover 12 is squeezed on the right side by the adjusting bolt 14, so that the bearing pressure cover 12 cooperates with the bearing bracket 5 to fix the rolling bearing 6, thereby completing the fixation of the driving gear shaft 2 and the driven gear shaft 3.

[0016] The bearing adjustment washer 7 can be ground to different thicknesses to match the clearance between the front bracket 8 and the rolling bearing 6. By adjusting the installation clearance, a gap is left between the gear segments of both the driving gear shaft 2 and the driven gear shaft 3 and the friction plate 4. The axial force acting on both shafts is borne by the rolling bearing 6, reducing wear and increasing service life. If bearing wear causes the driving gear shaft 2 and the driven gear shaft 3 to become loose again, the driving gear shaft 2 and the driven gear shaft 3 can be dynamically locked by adjusting the bolt 14. At the same time, the bearings or friction plate 4 can be replaced as needed.

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0018] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood based on specific circumstances.

[0019] Although the specific embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by ordinary technicians in this field, various changes can be made without departing from the purpose of the present invention. Modifications or deformations that do not involve creative work are still within the scope of protection of the present invention.

Claims

1. A gear pump with axial positioning of rolling bearings, characterized in that: The invention comprises a pump body (1), a driving gear shaft (2), a driven gear shaft (3), a friction plate (4), a bearing bracket (5), a rolling bearing (6), a bearing adjustment washer (7), a front bracket (8), a machine seal chamber (9), a mechanical seal (10), a rear bracket (11), a bearing pressure cover (12), a pressing nut (13), an adjusting bolt (14), and a rear cover (15); the front bracket (8) is mounted on the left side of the pump body (1); the rear bracket (11) is mounted on the right side of the pump body (1); the machine seal chamber (9) is mounted on the left side of the front bracket (8); the rear cover (15) is mounted on the right side of the rear bracket (11); the gear segment of the driving gear shaft (2) is mounted on the upper side of the interior of the pump body (1); the gear segment of the driven gear shaft (3) is mounted on the lower side of the interior of the pump body (1) and meshes with the gear segment of the driving gear shaft (2); the friction plate (4) is mounted on the left and right sides of the pump body (1); the bearing bracket (5) is mounted in the friction plate (4); the The rolling bearing (6) is installed on the shaft sections on both sides of the driving gear shaft (2) and the driven gear shaft (3), and is located in the front bracket (8) and the rear bracket (11); the bearing adjustment washer (7) is installed on the left shaft section of the driving gear shaft (2) and the driven gear shaft (3), and is located in the front bracket (8); the bearing adjustment washer (7) fills the gap between the rolling bearing (6) and the front bracket (8), so that there is a gap between the gear sections of the driving gear shaft (2) and the driven gear shaft (3) and the friction plate (4), and the axial force received by the driving gear shaft (2) and the driven gear shaft (3) is borne by the rolling bearing (6); the mechanical seal (10) is installed on the left shaft section of the driving gear shaft (2) and is located in the mechanical seal cavity (9); the bearing pressure cover (12) is installed in the rear bracket (11) and is pressed on the right end face of the rolling bearing (6); the adjusting bolt (14) passes through the rear bracket (11) and is pressed on the bearing pressure cover (12), and is equipped with a pressure nut (13) for locking.

2. A gear pump with axial positioning of rolling bearings according to claim 1, characterized in that: The friction plates (4) are four in total and are respectively located between the gear sections of the driving gear shaft (2), the driven gear shaft (3) and the front bracket (8) and the rear bracket (11) when installed.

3. The gear pump with rolling bearing axial positioning according to claim 1, characterized in that: The bearing brackets (5) are four in total and are located between the driving gear shaft (2), the driven gear shaft (3) gear segments and the rolling bearings (6) when installed.

4. The gear pump with axial positioning of rolling bearings according to claim 1, characterized in that: The left and right shaft sections of the driving gear shaft (2) and the driven gear shaft (3) are each provided with a plurality of rolling bearings (6) arranged side by side, and the bearing adjustment washers (7) and the bearing pressure covers (12) are both two pieces.

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