Novel booster gear pump

Abstract

The novel booster gear pump comprises a front cover, a pump body, a rear cover and a flange cover, the front cover and the rear cover are fixedly connected to the front portion and the rear portion of the pump body through bolts correspondingly, a separable coaxial reversing mechanism is installed in the pump body, and a driven bevel gear shaft II is installed in a needle bearing; the other end of the driving gear shaft is coaxially assembled with the joint sleeve in the pump body, and an oil suction port a, an oil discharge port b, an oil discharge port c and an oil duct d are formed in the pump body; two pairs of gears with the same modulus and tooth number are arranged in double rows, two-stage pressurization of the gear pump is achieved through a separable coaxial reverse shaft mechanism, namely after first-stage pressurization, high-pressure oil is discharged and conveyed to a hydraulic system after being pressurized again through an oil channel in a pump body, the requirement of a high-pressure system is met, meanwhile, the two stages can be separated through a joint sleeve structure, and the requirement of the high-pressure system is met. Compared with a traditional gear pump, the gear pump meets the requirements of different pressure systems, and the gear pump can be applied more widely.

Description

Technical Field

[0001] The invention relates to the field of hydraulic technology, and in particular to a novel booster gear pump. Background Art

[0002] Hydraulic transmission has been widely used in machinery, construction, agriculture, aviation and other industries. The hydraulic pump is the power element of the hydraulic system. The gear pump is a commonly used volumetric hydraulic pump, which is divided into external gear pumps and internal gear pumps. Among them, the core component of the external gear pump is a pair of gears with the same module and number of teeth that mesh and separate to form a volume change of the closed volume of the positive displacement pump, thereby realizing oil suction and discharge, and completing the function of inputting high-pressure oil to the hydraulic system. The gear pump has the advantages of simple structure, small size and light weight, easy processing of parts, reliable operation, strong self-priming ability, insensitivity to oil contamination, and easy maintenance.

[0003] A continuous boost gear pump disclosed in a Chinese patent (CN212959093U) has an outer shell formed by a plurality of plates sealed and spliced ​​together to form an integral body; a gear assembly, which is built into the outer shell, and includes a driving wheel and at least two driven wheels, wherein the driving wheel and each driven wheel are meshed and connected to each other to form a meshing area; a transition channel, wherein one end of the transition channel extends to the side of the meshing area between the driving wheel and the driven wheel; and a plurality of boost input channels and boost output channels are connected to the outer shell, wherein each boost input channel and boost output channel are connected to the meshing area, wherein at least one boost input channel and one boost output channel are connected to the transition channel. The multi-stage continuous boost delivery is realized, the working efficiency of the gear pump is improved, and the energy consumption during the delivery process is reduced. Although the patent realizes the effect of multi-stage boosting, it adopts multiple gears to mesh at the same time and transmit power, and can only output the oil after multi-stage boosting, and cannot flexibly switch between the first-stage boosting and the second-stage boosting, which makes the gear pump consume a lot of energy during the first-stage boosting process, which is not conducive to practical use. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A novel booster gear pump comprises a front cover, a pump body, a rear cover and a flange cover. The front and rear of the pump body are respectively fixedly connected with the front cover and the rear cover by bolt assemblies, and the flange cover is fixedly connected to the other side of the rear cover. The pump body is provided with an oil suction port a, an oil discharge port b, an oil discharge port c and an oil passage d. A detachable coaxial reversing mechanism is installed inside the pump body. The detachable coaxial reversing mechanism comprises a driven bevel gear shaft II, a driving bevel gear shaft, a driven bevel gear shaft I, a driving gear II, a driven gear II, an engaging sleeve, a driving gear shaft, a driving gear I and a driven gear I. The driven bevel gear shaft II penetrates the driven bevel gear shaft I. The driven bevel gear shaft I is installed with a driving gear II through a flat key. The driving gear II is meshed with the driven gear II. One end of the driven bevel gear shaft II is sleeved with a slidable engaging sleeve. A rotating driving gear shaft is installed inside the front cover. The driving gear shaft is installed with a driving gear I through a flat key. The driving gear I is meshed with the driven gear I.

[0007] As a further description of the above technical solution:

[0008] A plurality of sets of needle bearings are installed in the front cover, pump body, rear cover and flange cover. The detachable coaxial reversing mechanism also includes a driven shaft II, a handle, a driving gear I and a driven shaft I. The other end of the driven bevel gear shaft II extends to the outside of the rear cover and meshes with the driving bevel gear shaft.

[0009] As a further description of the above technical solution:

[0010] The distance between the driving gear shaft and the engagement sleeve is 1 cm.

[0011] As a further description of the above technical solution:

[0012] The coupling sleeve is provided with a threaded hole and a fixing threaded hole. A handle is connected inside the threaded hole in the coupling sleeve, and a fixing screw is connected inside the fixing threaded hole in the coupling sleeve.

[0013] As a further description of the above technical solution:

[0014] A sealing ring is installed between the front cover and the pump body, and a sealing ring is installed between the pump body and the rear cover.

[0015] As a further description of the above technical solution:

[0016] The driven bevel gear shaft I is installed on the inner wall of the driving gear II through a flat key, the driven gear II is installed on the driven shaft II through a flat key, and side plates II are installed on both sides of the driven gear II.

[0017] As a further description of the above technical solution:

[0018] The engaging sleeve is assembled on the driven bevel gear shaft II through the position of the driving gear shaft, and the set screw in the set threaded hole on the engaging sleeve is fixed to the driven bevel gear shaft II.

[0019] As a further description of the above technical solution:

[0020] The driving gear shaft is installed on the inner wall of the driving gear I through a flat key, and the driven shaft I is installed in the needle bearing between the front cover and the pump body.

[0021] As a further description of the above technical solution:

[0022] The driven shaft I is installed on the inner wall of the driven gear I through a flat key, and side plates I are installed on both sides of the driven gear I.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: two pairs of gears with the same module and number of teeth are arranged in double rows, and a two-stage pressurization of the gear pump is achieved through a detachable coaxial counter-axis mechanism, that is, after the first stage of pressurization, the high-pressure oil is pressurized again through the oil channel in the pump body and then discharged to the hydraulic system to meet the needs of the high-pressure system. At the same time, the two stages can be separated through the coupling sleeve structure, and the high-pressure oil is output to the system after only one pressurization. Compared with traditional gear pumps, it meets the needs of different pressure systems and makes the gear pump more widely used. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view of the present invention;

[0025] Figure 2 It is a cross-sectional view of the structure AA of the present invention;

[0026] Figure 3 For the present invention Figure 2 A magnified image of the detached state of the middle Ⅰ area;

[0027] Figure 4 For the present invention Figure 2 A magnified view of the junction state of the middle Ⅰ region;

[0028] Figure 5 It is a right side view of the present invention;

[0029] Figure 6 It is a cross-sectional view of the structure BB of the present invention;

[0030] Figure 7 It is a cross-sectional view of the structure CC of the present invention;

[0031] Figure 8 A top view of the present invention;

[0032] Fig. 9 It is a schematic diagram of the structure of the coupling sleeve in the present invention.

[0033] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0034] 1. Front cover; 2. Bolt assembly; 3. Sealing ring; 4. Flat key; 5. Driving gear I; 6. Needle bearing; 7. Pump body; 8. Driving gear II; 9. Driven bevel gear shaft I; 10. Rear cover; 11. Flange cover; 12. Driven bevel gear shaft II; 13. Driving bevel gear shaft; 14. Driven shaft II; 15. Driven gear II; 16. Side plate II; 17. Joint sleeve; 18. Driven shaft I; 19. Driven gear I; 20. Side plate I; 21. Driving gear shaft; 22. Handle; 23. Set screw. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0038] Reference Figure 1 and Figure 2 , which is a front view and AA sectional view of a novel booster gear pump disclosed in the present invention, including a front cover 1, a pump body 7, a rear cover 10 and a flange cover 11. The front and rear sides of the pump body 7 are connected with the front cover 1 and the rear cover 10 by bolt assemblies 2, and the other side of the rear cover 10 is threadedly connected with the flange cover 11. The pump body 7 is provided with an oil suction port a, an oil discharge port b, an oil discharge port c and an oil passage d. The oil suction port a is connected to the oil tank so that the hydraulic oil enters the gear pump. The oil discharge port b is a primary pressure oil discharge port, and the oil discharge port c is a secondary pressure oil discharge port. When the primary pressure is required, the oil discharge port c is blocked to prevent leakage and pollution. The oil discharge port b is connected to the load to provide pressure. When the secondary pressure is required, the oil discharge port b is blocked, and the oil reaches the oil discharge port c through the oil passage d. The oil discharge port c is connected to the load to provide pressure.

[0039] Reference Figure 2 , Figure 3 and Figure 4, which is a sectional view AA and a partial area enlarged view of a novel booster gear pump structure disclosed by the present invention, a needle bearing 6 is installed inside the flange cover 11, a driven bevel gear shaft II 12 is installed inside the needle bearing 6, one end of the driven bevel gear shaft II 12 extends to the outside of the rear cover 10 and meshes with a driving bevel gear shaft 13, a through hole is provided in the middle of the driven bevel gear shaft I 9, the driven bevel gear shaft II 12 passes through the through hole, and a coupling sleeve 17 is sleeved on the end of the driven bevel gear shaft II 12, a rotating driving gear shaft 21 is installed inside the front cover 1, and the other end of the driving gear shaft 21 is coaxially assembled with the coupling sleeve 17 in the pump body 7, and the driving gear shaft 21 and the coupling sleeve 17 are connected. The distance is 1cm. When the coupling sleeve 17 moves, the purpose of disengagement and engagement is achieved. A threaded hole and a fixing threaded hole are provided on the coupling sleeve 17. The threaded hole in the coupling sleeve 17 is internally connected with a handle 22 to realize the movement of the coupling sleeve 17. The fixing threaded hole in the coupling sleeve 17 is internally connected with a fixing screw 23. When the handle 22 drives the coupling sleeve 17 to move, it reaches the engaged position and the fixing of the driven bevel gear shaft II 12 is achieved by the fixing screw 23 in the fixing threaded hole. The disengagement is the same. After the fixing is completed, the handle 22 can be removed. Therefore, the engagement of the coupling sleeve 17 with the driving gear shaft 21 can drive the second row of gears to rotate, thereby achieving the effect of increasing the pressure.

[0040] Reference Figure 2 , Figure 5 and Figure 6 Figure 7 and Figure 8, which is a right view, a top view and a cross-sectional view of a new type of booster gear pump disclosed in the present invention. A driving bevel gear shaft 13 is installed in the needle bearing 6 between the rear cover 10 and the flange cover 11. One end of the driving bevel gear shaft 13 is driven to rotate by the motor through the flat key 4. The driving bevel gear shaft 13 is arranged inside the pump body 7 and is meshed and assembled with the driven bevel gear shaft I9 and the driven bevel gear shaft II12. One end of the driven bevel gear shaft I9 is ​​installed on the flange through the needle bearing 6. The driven bevel gear shaft I9 is ​​connected to the driving gear II8 through a flat key 4. The driven gear II15 is installed in the needle bearing 6 between the pump body 7 and the rear cover 10. The driven gear II15 is installed on the driven shaft II14 through a flat key 4 and meshes with the driving gear II8. The two sides of the driven gear II15 are connected to the driving gear II8 through a flat key 4. The side plate Ⅱ16 is installed on the side to prevent internal leakage. The coupling sleeve 17 is assembled on the driven bevel gear shaft Ⅱ12 through the position of the driving gear shaft 21. It is fixed to the driven bevel gear shaft Ⅱ12 by the set screw 23 in the set threaded hole on the coupling sleeve 17 in a clearance fit manner. The driving gear shaft 21 is installed with the driving gear Ⅰ5 through the flat key 4. The driven shaft Ⅰ18 is installed in the needle bearing 6 between the front cover 1 and the pump body 7. The driven shaft Ⅰ18 is installed with the driven gear Ⅰ5 through the flat key 4. The driven gear Ⅰ19 is meshed and assembled with the driving gear Ⅰ5. Side plates Ⅰ20 are installed on both sides of the driven gear Ⅰ19 to prevent internal leakage. By arranging the driven bevel gear shaft Ⅱ12, the driving bevel gear shaft 13, the driven bevel gear shaft Ⅰ9, the driving gear Ⅱ8, the driven gear Ⅱ15, the driven shaft 14, the coupling sleeve 17, the driving gear shaft 21, the handle 22, the driving gear Ⅰ5, the driven gear Ⅰ19 and the driven shaft Ⅰ18, a detachable coaxial reversing mechanism can be formed.

[0041] When in use, the external motor drives the driving bevel gear shaft 13 to rotate through the flat key 4, and the driven bevel gear shaft I9 and the driven bevel gear shaft II12 rotate accordingly through the driving bevel gear shaft 13. The gears of the driven bevel gear shaft I9 and the driven bevel gear shaft II12 are relatively meshed on the gear of the driving bevel gear shaft 13, so that the rotation directions of the driven bevel gear shaft I9 and the driven bevel gear shaft II12 are opposite. Since the driving gear II8 is connected to the driven bevel gear shaft I9 through the flat key 4, the driven gear II15 is meshed and assembled with the driving gear II8, so it rotates together to form a primary pressure output, and the hydraulic oil enters from the oil suction port a and exits from the oil discharge port b. At this time, the coupling sleeve 17 does not connect the driven bevel gear shaft I9 and the driving gear shaft 21 together, and the driving gear shaft 21 does not rotate.

[0042] When the coupling sleeve 17 connects the driven bevel gear shaft II12 and the driving gear shaft 21 together, the driving gear shaft 21 rotates together with the driven bevel gear shaft II12. Since the driving gear I5 is connected to the driving gear shaft 21 through the flat key 4, and the driven gear I19 is meshed and assembled with the driving gear I5, it rotates together to form a secondary pressure output, wherein the driven bevel gear shaft II12 and the driven bevel gear shaft I9 rotate in opposite directions, so that the rotation direction of the driving gear I5 is opposite to that of the driving gear II8, so that the liquid flow directions controlled by the two driving gears are opposite, that is, the driving gear II8 and the driven gear II15 mesh and rotate to make the oil flow out into the oil channel d (blocking the oil drain port b), and the driving gear I5 and the driven gear I19 mesh and rotate to make the oil in the oil channel d flow to the secondary pressurization, and finally discharged from the oil drain port c at this time.

[0043] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the protection scope determined by the claims submitted for the present invention.

Claims

1. A novel booster gear pump, comprising a front cover (1), a pump body (7), a rear cover (10) and a flange cover (11), characterized in that: The pump body (7) is fixedly connected to a front cover (1) and a rear cover (10) at the front and rear ends thereof by bolt assemblies (2), and the other side of the rear cover (10) is fixedly connected to a flange cover (11). The pump body (7) is provided with an oil suction port a, an oil discharge port b, an oil discharge port c and an oil passage d. A detachable coaxial reversing mechanism is installed inside the pump body (7). The detachable coaxial reversing mechanism comprises a driven bevel gear shaft II (12), a driving bevel gear shaft (13), a driven bevel gear shaft I (9), a driving gear II (8), a driven gear II (15), an engagement sleeve (17), a driving gear shaft (21), a driving gear I (5) and a driven gear I (19), the driven bevel gear shaft II (12) penetrates the driven bevel gear shaft I (9), the driven bevel gear shaft I (9) is mounted with a driving gear II (8) via a flat key (4), the driving gear II (8) is meshed with the driven gear II (15), one end of the driven bevel gear shaft II (12) is sleeved with a slidable engagement sleeve (17), a rotatable driving gear shaft (21) is mounted inside the front cover (1), the driving gear shaft (21) is mounted with a driving gear I (5) via a flat key (4), and the driving gear I (5) is meshed with the driven gear I (19).

2. A new type of booster gear pump according to claim 1, characterized in that: A plurality of sets of needle bearings (6) are installed in the front cover (1), the pump body (7), the rear cover (10) and the flange cover (11). The detachable coaxial reversing mechanism also includes a driven shaft II (14), a handle (22), a driving gear I (5) and a driven shaft I (18). The other end of the driven bevel gear shaft II (12) extends to the outside of the rear cover (10) and is meshed with a driving bevel gear shaft (13).

3. A new type of booster gear pump according to claim 1, characterized in that: The distance between the driving gear shaft (21) and the engagement sleeve (17) is 1 cm.

4. A new type of booster gear pump according to claim 2, characterized in that: The coupling sleeve (17) is provided with a threaded hole and a fixing threaded hole. The threaded hole in the coupling sleeve (17) is internally connected to a handle (22), and the fixing threaded hole in the coupling sleeve (17) is internally connected to a fixing screw (23).

5. A new type of booster gear pump according to claim 1, characterized in that: A sealing ring (3) is installed between the front cover (1) and the pump body (7), and a sealing ring (3) is installed between the pump body (7) and the rear cover (10).

6. A new type of booster gear pump according to claim 1, characterized in that: The driven bevel gear shaft I (9) is mounted on the inner wall of the driving gear II (8) via a flat key (4), the driven gear II (15) is mounted on the driven shaft II (14) via a flat key (4), and side plates II (16) are mounted on both sides of the driven gear II (15).

7. A new type of booster gear pump according to claim 1, characterized in that: The engaging sleeve (17) is assembled on the driven bevel gear shaft II (12) through the position of the driving gear shaft (21), and the set screw (23) in the set threaded hole on the engaging sleeve (17) is fixed to the driven bevel gear shaft II (12).

8. A new type of booster gear pump according to claim 2, characterized in that: The driving gear shaft (21) is mounted on the inner wall of the driving gear I (5) via a flat key (4), and a driven shaft I (18) is mounted in a needle bearing (6) between the front cover (1) and the pump body (7).

9. A new type of booster gear pump according to claim 2, characterized in that: The driven shaft I (18) is mounted on the inner wall of the driven gear I (19) via a flat key (4), and side plates I (20) are mounted on both sides of the driven gear I (19).

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