A two-dimensional space transformation screw conveyor machine

Abstract

The present invention belongs to the field of pumps, and particularly relates to a two-dimensional space transformation screw conveyor, which includes a liquid suction component. The liquid suction component includes a stator, a rotor screw rotatably connected inside the stator, and a screw pump liquid inlet arranged at the front end of the stator. It also includes a main housing fixedly connected to the rear end of the stator, and a liquid discharge component and a drive component are arranged inside the main housing. The present invention combines a screw pump and a piston pump, has excellent self-priming ability, and at the same time has a very high conveying pressure, and can be applied to a wider range compared with traditional screw pumps and piston pumps, which has a positive significance for the hydraulic industry.

Description

Technical Field

[0001] The present invention belongs to the field of pumps, and particularly relates to a two-dimensional space transformation screw conveyor. Background Art

[0002] Screw pumps and piston pumps are two common hydraulic pumps. The screw pump is characterized by excellent self-priming ability, but the pressure for conveying is not high. While the piston pump is characterized by high conveying pressure, but has no self-priming ability or relatively weak self-priming ability.

[0003] Based on the above problems, the applicant proposes a two-dimensional space transformation screw conveyor, which combines a screw pump and a piston pump. It has excellent self-priming ability and high conveying pressure, and has positive significance for the hydraulic industry. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art, the present invention provides a technical solution for a two-dimensional space transformation screw conveyor.

[0005] The described two-dimensional space transformation screw conveyor includes a liquid suction assembly. The liquid suction assembly includes a stator, a rotor screw rotatably connected inside the stator, and a screw pump liquid inlet provided at the front end of the stator. It is characterized in that it further includes a main housing fixedly connected to the rear end of the stator. A liquid discharge assembly and a driving assembly are provided inside the main housing. The liquid discharge assembly includes a cylinder sleeve fixedly connected to the main housing, a cylinder body rotatably inserted into the cylinder sleeve, a control valve group provided inside the cylinder body, and a piston slidably connected inside the cylinder body. The cylinder sleeve has a cylinder sleeve liquid outlet, and the cylinder body has a cylinder body liquid outlet corresponding to the cylinder sleeve liquid outlet. The control valve group is used to control whether the cylinder body liquid outlet is communicated with the liquid suction assembly. The cylinder body is fixedly connected to the rotor screw; the driving assembly includes a main shaft mechanism that can be driven to rotate by a motor, a spherical sleeve sleeved on the main shaft mechanism, and a connecting rod rotatably connected to the rear end of the piston. The main shaft mechanism is in transmission connection with the cylinder body and can drive the cylinder body to rotate. An annular groove is formed on the outer surface of the spherical sleeve, and the annular groove is inclined relative to the axis of the spherical sleeve. The lower end of the connecting rod is rotatably connected to the annular groove. When the spherical sleeve rotates, the lower end of the connecting rod can move along the annular groove, so that the connecting rod drives the piston to slide back and forth inside the cylinder body.

[0006] The described two-dimensional space transformation screw conveyor is characterized in that the control valve group includes a valve body fixedly connected inside the cylinder body, a valve rod fixedly inserted into the valve body, and a valve core sleeved on the rear end of the valve rod. A first compression spring is provided between the rear end head of the valve rod and the valve core. The valve body divides the inner cavity of the cylinder body into a front cavity and a rear cavity. The valve body has a first flow passage for communicating the front cavity and the rear cavity and a second flow passage for communicating the rear cavity and the cylinder body liquid outlet. The valve core has a valve core liquid inlet communicated with the second flow passage, and the valve core is used to block the first flow passage.

[0007] The described two-dimensional space transformation screw conveyor machine is characterized in that the rear end of the rotor screw is fixedly connected to a screw end cover, the screw end cover is fixedly connected to the front end of the cylinder block, and the screw end cover is provided with a screw end cover liquid outlet communicating with the front cavity of the cylinder block.

[0008] The described two-dimensional space transformation screw conveyor machine is characterized in that a first variable-speed gear is fixedly sleeved on the cylinder block, and a second variable-speed gear meshing with the first variable-speed gear is arranged at the front end of the main shaft mechanism.

[0009] The described two-dimensional space transformation screw conveyor machine is characterized in that a swinging outer ring is sleeved outside the annular groove of the spherical sleeve, a group of ball bearings are embedded between the swinging outer ring and the annular groove, and a connecting rod is fixedly connected to the swinging outer ring.

[0010] The described two-dimensional space transformation screw conveyor machine is characterized in that the main shaft mechanism includes a first bearing arranged in the main housing, a main shaft seat rotatably inserted into the first bearing, a main shaft body drivably inserted into the main shaft seat, and a second compression spring arranged in the main shaft seat for pressing the main shaft body tightly.

[0011] The described two-dimensional space transformation screw conveyor machine is characterized in that the inner ring of the first bearing is fixedly connected to the spherical sleeve.

[0012] The described two-dimensional space transformation screw conveyor machine is characterized in that the main shaft mechanism further includes a second bearing arranged in the main housing, and the front end of the main shaft body is rotatably inserted into the second bearing.

[0013] The described two-dimensional space transformation screw conveyor machine is characterized in that a one-way valve is arranged at the cylinder sleeve liquid outlet of the cylinder sleeve.

[0014] The described two-dimensional space transformation screw conveyor machine is characterized in that the annular groove is a sine curve when unfolded on a plane.

[0015] Compared with the prior art, the present invention combines a screw pump and a plunger pump, has excellent self-priming ability while having a very high delivery pressure, and can be applied in a wider range compared with traditional screw pumps and plunger pumps, which has a positive significance for the hydraulic industry. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the present invention;

[0017] Figure 2 is Figure 1 an enlarged view at position A in

[0018] Figure 3 is Figure 1 an enlarged view at position B in

[0019] Figure 4 Schematic diagram of the connection structure between the piston and the spherical casing in the present invention;

[0020] Figure 5 One of the schematic diagrams of the spherical casing structure in the present invention;

[0021] Figure 6 Another schematic diagram of the spherical casing structure in the present invention;

[0022] Figure 7 The third schematic diagram of the spherical casing structure in the present invention.

[0023] In the figure: stator 1, rotor screw 2, screw end cover 200, liquid outlet of screw end cover 2000, liquid inlet of screw pump 3, main housing 4, cylinder liner 5, liquid outlet of cylinder liner 500, cylinder block 6, liquid outlet of cylinder block 600, front chamber 601, rear chamber 602, piston 7, spherical casing 8, annular groove 800, connecting rod 9, valve body 10, first flow channel 1000, second flow channel 1001, valve stem 11, valve core 12, first compression spring 13, first variable-speed gear 14, second variable-speed gear 15, swinging outer ring 16, ball 17, first bearing 18, inner ring 1800, spindle seat 19, spindle body 20, second compression spring 21, second bearing 22, check valve 23, motor shaft 24, screw pump housing 25, screw pump end 26. Specific embodiments

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] As Figures 1-7 shown, a two-dimensional space transformation screw conveyor includes a liquid suction assembly, and the liquid suction assembly is a single-screw pump, including a stator 1, a rotor screw 2 rotatably connected inside the stator 1, a screw pump end 26 provided at the front end of the stator 1, and a screw pump housing 25 fixedly sleeved outside the stator 1. The screw pump end 26 has a liquid inlet of the screw pump 3 communicating with the inside of the stator 1. The inner surface of the stator 1 is a double-threaded spiral surface screw bushing. The structural and mechanical connection relationship between the stator 1 and the rotor screw 2 in the liquid suction assembly is a well-known technology. Its working principle is that when the rotor screw 2 rotates, on the one hand, the rotor screw 2 rotates around its own axis, and on the other hand, it rolls along the inner surface of the stator 1, thus forming a sealed chamber of the pump. For each revolution of the rotor screw 2, the liquid in the sealed chamber advances one pitch forward. With the continuous rotation of the rotor screw 2, the liquid is pressed from one sealed chamber to another in a spiral manner and finally extruded from the stator 1.

[0026] The rear end of the stator 1 is fixedly connected to the main housing 4. The main housing 4 is a front-back split structure for easy disassembly. A liquid drainage component and a driving component are arranged inside the main housing 4. The liquid drainage component includes a cylinder sleeve 5 fixedly connected to the main housing 4, a cylinder block 6 rotatably inserted into the cylinder sleeve 5, a control valve group arranged inside the cylinder block 6, and a piston 7 slidably connected inside the cylinder block 6. The cylinder sleeve 5 has a cylinder sleeve liquid outlet 500, and the cylinder block 6 has a cylinder block liquid outlet 600 corresponding to the cylinder sleeve liquid outlet 500. The control valve group is used to control whether the cylinder block liquid outlet 600 is communicated with the liquid suction component. The cylinder block 6 is fixedly connected to the rotor screw 2. A third bearing for supporting the cylinder block 6 can also be arranged inside the main housing 4.

[0027] The driving component includes a main shaft mechanism that can be driven to rotate by a motor, a spherical sleeve 8 sleeved on the main shaft mechanism, and a connecting rod 9 rotatably connected to the rear end of the piston 7. The main shaft mechanism is in transmission connection with the cylinder block 6 and can drive the cylinder block 6 to rotate. An annular groove 800 is formed on the outer surface of the spherical sleeve 8. The annular groove 800 is inclined relative to the axis of the spherical sleeve 8. The lower end of the connecting rod 9 is rotatably connected to the annular groove 800. When the spherical sleeve 8 rotates, the lower end of the connecting rod 9 can move along the annular groove 800, so that the connecting rod 9 drives the piston 7 to slide back and forth inside the cylinder block 6. Specifically, when the annular groove 800 is unfolded on a plane, it is a sine curve with a minimum period. A rotating shaft is rotatably connected to the rear end of the piston 7, and the connecting rod 9 is inserted and fixed to the rotating shaft, thereby realizing the rotational connection between the connecting rod 9 and the piston 7.

[0028] As an optimized structure of the present invention: The control valve group includes a valve body 10 fixedly connected inside the cylinder block 6, a valve rod 11 fixedly inserted into the valve body 10, and a valve core 12 sleeved on the rear end of the valve rod 11. A first compression spring 13 is arranged between the rear end head of the valve rod 11 and the valve core 12. The valve body 10 divides the inner cavity of the cylinder block 6 into a front cavity 601 and a rear cavity 602. The valve body 10 has a first flow channel 1000 for communicating the front cavity 601 with the rear cavity 602 and a second flow channel 1001 for communicating the rear cavity 602 with the cylinder block liquid outlet 600. The valve core 12 has a valve core liquid inlet communicated with the second flow channel 1001. The valve core 12 is used to block the first flow channel 1000. The control valve group in the present invention is a conventional valve structure, and the valve body 10 and the valve rod 11 also have other conventional components.

[0029] As an optimized structure of the present invention: The rear end of the rotor screw 2 is fixedly connected to a screw end cover 200. The screw end cover 200 is fixedly connected to the front end of the cylinder block 6. The screw end cover 200 has a screw end cover liquid outlet 2000 communicated with the front cavity 601 of the cylinder block 6.

[0030] As an optimized structure of the present invention: A first speed-changing gear 14 is fixedly sleeved on the cylinder block 6, and a second speed-changing gear 15 meshing with the first speed-changing gear 14 is arranged at the front end of the main shaft mechanism.

[0031] As an optimized structure of the present invention: a swing outer ring 16 is sleeved outside the annular groove 800 of the spherical sleeve 8, a set of rolling balls 17 are embedded between the swing outer ring 16 and the annular groove 800, the connecting rod 9 is fixedly connected to the swing outer ring 16, and the spherical sleeve 8, the swing outer ring 16, the connecting rod 9 and the rolling balls 17 form a swing bearing. As the spherical sleeve 8 rotates, the structure formed by the swing outer ring 16 and the connecting rod 9 can swing on the spherical sleeve 8, thereby driving the piston 7 to reciprocate in the cylinder block 6.

[0032] As an optimized structure of the present invention: the main shaft mechanism includes a first bearing 18 arranged on the main housing 4, a main shaft seat 19 rotatably inserted into the first bearing 18, a main shaft body 20 drivably inserted into the main shaft seat 19, and a second compression spring 21 arranged in the main shaft seat 19 for pressing against the main shaft body 20. During use, the rear end of the main shaft seat 19 is inserted into the motor shaft 24, and the motor shaft 24 presses the second compression spring 21 to death. The function of setting the second compression spring 21 is as follows: in the present invention, the second speed-changing gear 15 is directly formed by machining the front end of the main shaft body 20. Sometimes it is necessary to change the speed ratio of the gear, then the main shaft body 20 has to be disassembled and a new main shaft body 20 has to be replaced. Repeated disassembly and assembly of the second speed-changing gear 15 are likely to become loose. Therefore, the second compression spring 21 is added to perform pressure compensation on the main shaft body 20.

[0033] As an optimized structure of the present invention: the inner ring 1800 of the first bearing 18 is fixedly connected to the spherical sleeve 8, and the spherical sleeve 8 has a toothed structure inside. The spherical sleeve 8 meshes with the toothed structure provided at the front end of the main shaft seat 19 through this toothed structure, so that the main shaft seat 19 can drive the spherical sleeve 8 to rotate.

[0034] As an optimized structure of the present invention: the main shaft mechanism further includes a second bearing 22 arranged on the main housing 4, and the front end of the main shaft body 20 is rotatably inserted into the second bearing 22.

[0035] As an optimized structure of the present invention: a conventional one-way valve 23 is arranged on the liquid outlet 500 of the cylinder sleeve 5.

[0036] Working process: The rear end of the spindle seat 19 is connected to a motor, and the motor shaft 24 of the motor drives the spindle mechanism to rotate. The second speed-changing gear 15 on the spindle body 20 drives the cylinder block 6 to rotate through the first speed-changing gear 14. The cylinder block 6 drives the rotor screw 2 to rotate, so that the liquid is sucked in from the liquid inlet 3 of the screw pump and flows to the front cavity 601 of the cylinder block 6 through the liquid outlet 2000 of the screw end cover. At the same time, the spherical sleeve 8 on the spindle mechanism is driven by the spindle seat 19 to rotate. The spherical sleeve 8 drives the piston 7 to move towards the rear end of the cylinder block 6 through the swing outer ring 16 and the connecting rod 9. The negative pressure formed by the movement of the piston 7 drives the valve core 12 to move backward, so that the first flow channel 1000 is communicated with the rear cavity 602, and the liquid is sucked from the front cavity 601 into the rear cavity 602. As the spherical sleeve 8 rotates, the piston 7 is driven by the connecting rod 9 to move towards the front end of the cylinder block 6. The valve core 12 is reset under the action of the first compression spring 13, blocking the first flow channel 1000. The piston 7 squeezes the liquid in the rear cavity 602, so that the liquid flows into the cylinder block liquid outlet 600 and the cylinder liner liquid outlet 500 in sequence through the valve core liquid inlet and the second flow channel 1001.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A two-dimensional space transformation screw conveyor machine, comprising a liquid suction assembly, the liquid suction assembly including a stator (1), a rotor screw (2) rotatably connected within the stator (1), and a screw pump liquid inlet (3) provided at the front end of the stator (1), characterized in that It further includes a main housing (4) fixedly connected to the rear end of the stator (1). A liquid discharge assembly and a driving assembly are arranged inside the main housing (4). The liquid discharge assembly includes a cylinder sleeve (5) fixedly connected to the main housing (4), a cylinder block (6) rotatably inserted into the cylinder sleeve (5), a control valve group arranged inside the cylinder block (6), and a piston (7) slidably connected inside the cylinder block (6). The cylinder sleeve (5) has a cylinder sleeve liquid outlet (500), and the cylinder block (6) has a cylinder block liquid outlet (600) corresponding to the cylinder sleeve liquid outlet (500). The control valve group is used to control whether the cylinder block liquid outlet (600) is communicated with the liquid suction assembly. The cylinder block (6) is fixedly connected to the rotor screw (2). The driving assembly includes a main shaft mechanism that can be driven to rotate by a motor, a spherical sleeve (8) sleeved on the main shaft mechanism, and a connecting rod (9) rotatably connected to the rear end of the piston (7). The main shaft mechanism is in transmission connection with the cylinder block (6) and can drive the cylinder block (6) to rotate. An annular groove (800) is formed on the outer surface of the spherical sleeve (8). The annular groove (800) is inclined relative to the axis of the spherical sleeve (8). The lower end of the connecting rod (9) is rotatably connected to the annular groove (800). When the spherical sleeve (8) rotates, the lower end of the connecting rod (9) can move along the annular groove (800), so that the connecting rod (9) drives the piston (7) to slide back and forth inside the cylinder block (6). A first transmission gear (14) is fixedly sleeved on the cylinder block (6), and a second transmission gear (15) meshing with the first transmission gear (14) is arranged at the front end of the main shaft mechanism. A swing outer ring (16) is sleeved outside the annular groove (800) of the spherical sleeve (8). A set of ball bearings (17) are embedded between the swing outer ring (16) and the annular groove (800). The connecting rod (9) is fixedly connected to the swing outer ring (16).

2. The two-dimensional space transformation screw conveyor machine according to claim 1, characterized in that The control valve group includes a valve body (10) fixedly connected inside the cylinder block (6), a valve rod (11) fixedly inserted into the valve body (10), and a valve core (12) sleeved on the rear end of the valve rod (11). A first compression spring (13) is arranged between the rear end head of the valve rod (11) and the valve core (12). The valve body (10) divides the inner cavity of the cylinder block (6) into a front cavity (601) and a rear cavity (602). The valve body (10) has a first flow channel (1000) for communicating the front cavity (601) with the rear cavity (602) and a second flow channel (1001) for communicating the rear cavity (602) with the cylinder block liquid outlet (600). The valve core (12) has a valve core liquid inlet communicated with the second flow channel (1001). The valve core (12) is used to block the first flow channel (1000).

3. The two-dimensional space transformation screw conveyor machine according to claim 2, characterized in that A screw end cover (200) is fixedly connected to the rear end of the rotor screw (2). The screw end cover (200) is fixedly connected to the front end of the cylinder block (6). The screw end cover (200) has a screw end cover liquid outlet (2000) communicated with the front cavity (601) of the cylinder block (6).

4. A two-dimensional space transformation screw conveyor machine according to any one of claims 1-3, characterized in that The spindle mechanism includes a first bearing (18) disposed in the main housing (4), a spindle base (19) rotatably inserted in the first bearing (18), a spindle body (20) drivingly inserted in the spindle base (19), and a second compression spring (21) disposed in the spindle base (19) for tightly pressing the spindle body (20).

5. A two-dimensional space transformation screw conveyor machine according to claim 4, characterized in that The inner ring (1800) of the first bearing (18) is fixedly connected to the spherical sleeve (8).

6. A two-dimensional space transformation screw conveyor machine according to claim 4, characterized in that The spindle mechanism further includes a second bearing (22) disposed in the main housing (4), and the front end of the spindle body (20) is rotatably inserted in the second bearing (22).

7. A two-dimensional space transformation screw conveyor machine according to any one of claims 1-3, characterized in that A check valve (23) is provided at the cylinder sleeve liquid outlet (500) of the cylinder sleeve (5).

8. A two-dimensional space transformation screw conveyor machine according to any one of claims 1-3, characterized in that The annular groove (800) is a sine curve when unfolded on a plane.

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