Axial reciprocating pump

Abstract

The invention relates to the technical field of reciprocating pumps, in particular to an axial reciprocating pump which comprises a shell, a shell cap, a rotor, a plunger and a flow distributor, a mounting cavity is formed in the shell, a mounting hole is formed in the center of the shell cap, a sealing ring piece is arranged in the mounting hole, a rotating shaft is arranged at the head end of the rotor, and a reciprocating driving mechanism is arranged at the tail end of the rotor and on the plunger. The tail end of the shell is provided with an oil inlet and an oil outlet, the oil inlet and the oil outlet are both communicated with the installation cavity, a first flow channel and a second flow channel are arranged in the flow distributor, a first one-way valve is arranged in the first flow channel, and a second one-way valve is arranged in the second flow channel. Rotation force is transmitted to the plunger through rotation of the rotor, then the plunger can be driven by the reciprocating driving mechanism to horizontally move back and forth in a reciprocating mode, so that oil is discharged from the mounting cavity or pumped into the mounting cavity, the structural size is small, the structure is compact, and the use range is widened.

Description

Technical Field

[0001] The invention relates to the technical field of reciprocating pumps, in particular to an axial reciprocating pump. Background Art

[0002] As the core component of medium transmission and energy transfer in hydraulic systems, hydraulic pumps are also a type of hydraulic device that converts mechanical energy into hydraulic energy by changing the volume of its cavity under the drive of a power source. Hydraulic pumps have the characteristics of high efficiency, compact structure, and wide application range. Reciprocating pumps are a common hydraulic pump that drives the plunger to reciprocate. Common reciprocating column pumps can be divided into crankshaft connecting rod type and electromagnetic type. The crankshaft connecting rod type reciprocating pump converts the rotary motion into the linear motion of the plunger through a rotating mechanism; the electromagnetic reciprocating pump directly drives the plunger motion through a linear oscillation motor. The reciprocating pump has the characteristics of high rated pressure, good adaptability to the medium, and simple maintenance. It is widely used in agricultural machinery, petrochemical industry, aerospace and other fields. With the advancement of hydraulic technology, the requirements for reciprocating pumps will gradually increase. However, the current crankshaft connecting rod type reciprocating pump is large in size, the power end and the motion end are arranged vertically, and its energy conversion rate is not high; the electromagnetic reciprocating pump is large in size, complex in structure, and difficult to produce. The above problems restrict the scope of use of reciprocating pumps to a certain extent. Summary of the invention

[0003] In order to make up for the above shortcomings, the present invention provides an axial reciprocating pump to solve the problem of how to reduce the volume of the reciprocating pump to increase the application range of the reciprocating pump proposed in the above background technology.

[0004] The technical solution of the present invention is:

[0005] An axial reciprocating pump comprises a shell, a shell cap, a rotor, a plunger and a distributor, wherein an installation cavity is provided in the shell, a mounting hole is provided at the center of the shell cap, a sealing ring is provided in the mounting hole, a rotating shaft coaxial with the head end of the rotor is provided, a reciprocating drive mechanism for driving the plunger to reciprocate back and forth is provided on the tail end of the rotor and the plunger, an oil inlet and an oil outlet are provided at the tail end of the shell, the oil inlet and the oil outlet are both connected with the installation cavity, a first flow channel and a second flow channel are provided in the distributor, a first check valve is provided in the first flow channel, and a second check valve is provided in the second flow channel, the head end of the shell is detachably connected to the shell cap, the rotating shaft seal is rotatably arranged in the sealing ring, the plunger is transmission-connected to the reciprocating drive mechanism, the tail end of the rotor abuts against the head end of the plunger, and the distributor is connected with the oil inlet and the oil outlet through a cross pipe.

[0006] Preferably, the reciprocating drive mechanism includes a coupling track and an elastic reset member, and two coupling tracks are provided. The two coupling tracks are respectively installed on the tail end of the rotor and the head end of the plunger, and the elastic reset member is located between the tail end of the plunger and the inner bottom wall of the mounting cavity.

[0007] Preferably, the coupling track comprises a plurality of abutment protrusions, all of which are evenly distributed at angles, and an inner concave abutment groove matching the abutment protrusions is formed between two adjacent abutment protrusions.

[0008] Preferably, one end of the abutting protrusion is provided with two symmetrically arranged chamfers.

[0009] Preferably, one end of the abutting protrusion is provided with two symmetrically arranged circular chamfers.

[0010] Preferably, the elastic return member is a spring, and the tail end of the plunger is provided with an abutment step for sleeve-mounting the spring.

[0011] Preferably, a limiting strip is provided on the inner wall of the installation cavity, and a limiting groove slidably matched with the limiting strip is provided on the outer wall of the plunger.

[0012] Preferably, a plurality of the limit bars are provided, and all the limit bars are evenly distributed at equal angles.

[0013] Preferably, an oil drain hole is provided on the outer wall of the shell cap.

[0014] Preferably, a plurality of the oil drain holes are provided, and all the oil drain holes are evenly distributed at equal angles.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] Firstly, the present invention transmits the rotational force to the plunger through the rotation of the rotor, and then the reciprocating drive mechanism can drive the plunger to move back and forth, so that the oil is discharged from the installation cavity or the oil is drawn into the installation cavity. This structure is small in size and compact in structure, which increases the scope of use.

[0017] Secondly, one rotation of the rotor of the present invention can make the plunger move back and forth multiple times. This structure can amplify the movement frequency of the plunger and improve the energy transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the axial reciprocating pump of the present invention;

[0019] Figure 2 is a cross-sectional view of an axial reciprocating pump of the present invention;

[0020] Figure 3 It is a schematic structural diagram of the rotor of the present invention;

[0021] Figure 4 A partial cross-sectional view of the axial reciprocating pump of the present invention Figure 1 ;

[0022] Figure 5 A partial cross-sectional view of the axial reciprocating pump of the present invention Figure 2 .

[0023] In the figure:

[0024] 1. Shell; 11. Mounting cavity; 111. Limiting strip; 12. Oil inlet; 13. Oil outlet; 2. Shell cap; 21. Sealing ring; 22. Oil drain hole; 3. Rotor; 31. Rotating shaft; 4. Plunger; 41. Resistance step; 42. Limiting slide groove; 5. Distributor; 51. First flow channel; 52. Second flow channel; 53. First one-way valve; 54. Second one-way valve; 6. Resistance boss; 7. Spring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-5 The present invention describes the above technical solution in detail through the following embodiments:

[0027] An axial reciprocating pump comprises a housing 1, a housing cap 2, a rotor 3, a plunger 4 and a distributor 5. The housing 1 is provided with a mounting cavity 11. The center of the housing cap 2 is provided with a mounting hole. A sealing ring 21 is provided in the mounting hole. The head end of the rotor 3 is provided with a rotating shaft 31 coaxial with the rotor 3. The tail end of the rotor 3 and the plunger 4 are provided with a reciprocating drive mechanism for driving the plunger 4 to move back and forth. The tail end of the housing 1 is provided with an oil inlet 12 and an oil outlet 13. The oil inlet 12 and the oil outlet 13 are provided with a reciprocating drive mechanism for driving the plunger 4 to move back and forth. Both are connected with the installation cavity 11, a first flow channel 51 and a second flow channel 52 are provided in the distributor 5, a first one-way valve 53 is provided in the first flow channel 51, a second one-way valve 54 is provided in the second flow channel 52, the head end of the shell 1 is detachably connected with the shell cap 2, the rotating shaft 31 is sealed and rotatably arranged in the sealing ring 21, the plunger 4 is transmission-connected with the reciprocating drive mechanism, the tail end of the rotor 3 is in conflict with the head end of the plunger 4, and the distributor 5 is connected with the oil inlet 12 and the oil outlet 13 through a cross pipe.

[0028] The present invention can use a motor to drive the rotating shaft 31 to rotate, and the rotating shaft 31 can drive the rotor 3 to rotate synchronously. The reciprocating driving mechanism can drive the plunger 4 to move back and forth. When the plunger 4 moves backward, the space between the plunger 4 and the inner bottom wall of the installation cavity 11 is reduced, and the oil in the installation cavity 11 can be discharged from the oil outlet 13. The second one-way valve 54 in the second flow channel 52 can prevent the oil from the second flow channel 52. Then the oil enters the first flow channel 51 through the cross pipe, and then the oil passes through the first one-way valve 53 and is discharged. When the plunger 4 moves forward, the space between the plunger 4 and the inner bottom wall of the installation cavity 11 increases, and the oil enters the second flow channel 52 through the second one-way valve 54. Then the oil enters the oil inlet 12 through the cross pipe, and then the oil enters the installation cavity 11, and the cycle is repeated. The present invention has a simple structure and a small size, which increases the scope of use.

[0029] The reciprocating drive mechanism includes a coupling track and an elastic reset member. There are two coupling tracks, which are respectively installed on the tail end of the rotor 3 and the head end of the plunger 4. The elastic reset member is located between the tail end of the plunger 4 and the inner bottom wall of the mounting cavity 11. The plunger 4 can be driven to move backward through the mutual interference between the two coupling tracks, and can be driven to reset through the elastic reset member.

[0030] The coupling track includes a plurality of contact protrusions 6, all of which are evenly distributed at angles, and a concave contact groove matching the contact protrusion 6 is formed between two adjacent contact protrusions 6. The contact protrusion 6 at the tail end of the rotor 3 can enter the concave contact groove at the head end of the plunger 4. As the rotor 3 rotates, the contact protrusion 6 of the rotor 3 can contact the contact protrusion 6 at the head end of the plunger 4, and then the plunger 4 gradually moves backwards, and the moving distance is consistent with the depth of the concave contact groove.

[0031] One end of the abutting protrusion 6 is provided with two symmetrically arranged chamfers, which can improve the smoothness of the transmission of the two abutting protrusions 6 against each other.

[0032] One end of the abutting protrusion 6 is provided with two symmetrically arranged circular chamfers, which can improve the smoothness of the transmission of the two abutting protrusions 6 against each other, and the wear rate of the circular chamfers is lower than the wear rate of the oblique chamfers.

[0033] The elastic reset member is a spring 7, and the tail end of the plunger 4 is provided with a resistance step 41 for sleeve-mounting the spring 7. The elastic restoring force of the spring 7 is utilized to enable the plunger 4 to automatically reset, and the resistance step 41 can simply limit the position of the spring 7 to prevent the spring 7 from deflecting.

[0034] A limit strip 111 is provided on the inner wall of the installation cavity 11, and a limit groove 42 is provided on the outer wall of the plunger 4, which is slidably matched with the limit strip 111. The limit strip 111 and the limit groove 42 cooperate with each other to limit the plunger 4, thereby preventing the plunger 4 from deflecting and making the movement of the plunger 4 smoother.

[0035] There are a plurality of limiting strips 111 , and all limiting strips 111 are evenly distributed at equal angles, thereby further improving the limiting effect on the plunger 4 .

[0036] An oil drain hole 22 is provided on the outer wall of the shell cap 2 , and oil can enter the shell cap 2 through the oil drain hole 22 , so as to cool and lubricate the rotor 3 .

[0037] There are a plurality of oil drain holes 22 , and all the oil drain holes 22 are evenly distributed at equal angles. By providing a plurality of oil drain holes 22 , the excess leaked oil can be discharged.

[0038] Although the above-mentioned embodiments have been described in detail in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific implementation modes. For ordinary technicians in this field, various changes, modifications, substitutions and variations of the above-mentioned embodiments without departing from the principle and scope of rights of the present invention are all within the protection scope of the present invention.

Claims

1. An axial reciprocating pump, characterized in that: The invention comprises a housing (1), a housing cap (2), a rotor (3), a plunger (4) and a distributor (5); the housing (1) is provided with a mounting cavity (11); the housing cap (2) is provided with a mounting hole at its center; a sealing ring (21) is provided in the mounting hole; the head end of the rotor (3) is provided with a rotating shaft (31) coaxial with the rotor; the tail end of the rotor (3) and the plunger (4) are provided with a reciprocating drive mechanism for driving the plunger (4) to move back and forth; the tail end of the housing (1) is provided with an oil inlet (12) and an oil outlet (13); the oil inlet (12) and the oil outlet (13) are both connected to the mounting cavity (11); The distributor (5) is connected to a cavity (11), a first flow channel (51) and a second flow channel (52) are provided in the distributor (5), a first one-way valve (53) is provided in the first flow channel (51), and a second one-way valve (54) is provided in the second flow channel (52), the head end of the shell (1) is detachably connected to the shell cap (2), the rotating shaft (31) is sealed and rotatably arranged in the sealing ring (21), the plunger (4) is transmission-connected to a reciprocating drive mechanism, the tail end of the rotor (3) is in contact with the head end of the plunger (4), and the distributor (5) is connected to the oil inlet (12) and the oil outlet (13) through a cross pipe.

2. The axial reciprocating pump according to claim 1, characterized in that: The reciprocating drive mechanism comprises a coupling track and an elastic reset member, wherein two coupling tracks are provided and the two coupling tracks are respectively mounted on the tail end of the rotor (3) and the head end of the plunger (4), and the elastic reset member is located between the tail end of the plunger (4) and the inner bottom wall of the mounting cavity (11).

3. The axial reciprocating pump according to claim 2, characterized in that: The coupling track comprises a plurality of abutment protrusions (6), all of which are evenly distributed at angles, and an inner concave abutment groove matching the abutment protrusions (6) is formed between two adjacent abutment protrusions (6).

4. The axial reciprocating pump according to claim 3, characterized in that: One end of the abutting protrusion (6) is provided with two symmetrically arranged chamfered corners.

5. The axial reciprocating pump according to claim 3, characterized in that: One end of the abutting protrusion (6) is provided with two symmetrically arranged circular arc chamfers.

6. The axial reciprocating pump according to claim 4 or 5, characterized in that: The elastic return member is a spring (7), and the rear end of the plunger (4) is provided with a resistance step (41) for sleeve-mounting the spring (7).

7. The axial reciprocating pump according to claim 6, characterized in that: A limiting strip (111) is provided on the inner wall of the installation cavity (11), and a limiting sliding groove (42) slidably matched with the limiting strip (111) is provided on the outer wall of the plunger (4).

8. The axial reciprocating pump according to claim 7, characterized in that: A plurality of the limiting strips (111) are provided, and all the limiting strips (111) are evenly distributed at equal angles.

9. The axial reciprocating pump according to claim 1, characterized in that: An oil drain hole (22) is provided on the outer wall of the shell cap (2).

10. The axial reciprocating pump according to claim 9, characterized in that: A plurality of the oil drain holes (22) are provided, and all the oil drain holes (22) are evenly distributed at equal angles.

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