Quantitative vane pump

Abstract

The utility model provides a constant flow vane pump, which relates to the technical field of hydraulic pumps, and comprises a pump shell, a rotating shaft is rotatably connected in the pump shell, a stator is fixedly mounted in the pump shell, a rotor is coaxially and fixedly connected to one end of the rotating shaft, a plurality of groups of grooves are formed in the rotor, springs are fixedly mounted in the grooves, and the springs are fixedly mounted in the grooves. Blades are fixedly installed at the ends, away from the rotor, of the springs. According to the vane pump, on one hand, the two-way screw is arranged in the vane, the vane head can be detachably replaced through the cooperation of the two-way screw and the nut, the problem that the vane head is abraded during long-term work is solved, the practicability of the device is improved, and on the other hand, the two-stage filter screen is fixedly installed in the oil suction pipe, so that the service life of the device is prolonged. An activated carbon filtering structure is arranged between the two filter screens, so that abrasion of impurities of raw materials to the pump body is avoided, and the working efficiency of the device is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pumps, in particular to a quantitative vane pump. Background Art

[0002] A vane pump is a device that converts mechanical energy into hydraulic energy and is widely used in various hydraulic systems. The vane pump uses the vanes in the rotor slots to contact the pump housing (stator ring), pressing the sucked liquid from the oil inlet side to the oil outlet side, thereby achieving liquid transportation and pressurization. The main types of vane pumps include single-acting and double-acting vane pumps. Single-acting vane pumps are generally variable displacement pumps, while double-acting vane pumps are fixed displacement pumps. The main difference between the two is the shape of the curve inside the stator, which results in a different number of times the pump shaft absorbs and pressurizes the oil per rotation. A single-acting vane pump absorbs and pressurizes the oil once per rotation, while a double-acting vane pump absorbs and pressurizes the oil twice per rotation.

[0003] Existing vane pumps have stringent requirements for oil cleanliness. Numerous tiny gaps and crevices exist within these pumps, and any impurities can cause the vanes to seize, compromising reliability and durability. When the pumped medium contains impurities such as particles or fibers, these impurities can become lodged within the pump, ultimately causing blockage. Furthermore, high viscosity can easily lead to blockage in vane pumps. This necessitates strict oil filtration during operation to maintain hydraulic system cleanliness. Therefore, we propose a fixed-displacement vane pump. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of the existing vane pumps. Existing vane pumps have very high requirements for oil cleanliness. Numerous tiny gaps and crevices exist within the pumps, and any impurities can cause the vanes to seize, affecting operational reliability and durability. When the pumped medium contains impurities such as particles or fibers, these impurities can become lodged within the pump, ultimately causing blockage. Furthermore, high viscosity media can easily lead to vane pump blockage. This necessitates strict oil filtration during operation to maintain the cleanliness of the hydraulic system.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A quantitative vane pump comprises a pump housing, a rotating shaft rotatably connected to the interior of the pump housing, a stator fixedly installed inside the pump housing, a rotor coaxially fixedly connected to one end of the rotating shaft, a plurality of grooves provided inside the rotor, springs fixedly installed in each of the grooves, a vane fixedly installed at one end of the spring away from the rotor, a bidirectional screw rotatably connected to the interior of the vane, nuts screwed and connected at both ends of the bidirectional screw, a connecting rod fixedly installed on the top of the nut, and a fastening plate fixedly installed at the end of the connecting rod away from the nut;

[0007] One side of the pump housing is fixedly connected to an oil suction pipe, and the other side is fixedly connected to an oil outlet pipe. Two layers of filter screens are fixedly installed inside the oil suction pipe.

[0008] Preferably, one end of the blade away from the spring is movably connected to a replacement head, and the top of the replacement head is movably connected to a rubber strip.

[0009] Preferably, a rear cover is movably connected to one side of the pump housing, and a support seat is fixedly installed inside the rear cover.

[0010] Preferably, a telescopic rod is fixedly mounted on the top of the support seat, and a damping shock absorber is provided inside the telescopic rod.

[0011] Preferably, a spring is sleeved on the outer periphery of the telescopic rod, and a support plate is fixedly mounted on the top of the telescopic rod.

[0012] Preferably, a motor is fixedly mounted on a side of the support plate away from the telescopic rod, an output end of the motor is coaxially fixedly connected to a rotating shaft, and an end of the rotating shaft close to the motor is rotatably connected to an oil distribution plate.

[0013] Preferably, a protective cover is hingedly connected to a side of the pump housing away from the rear cover via a hinge, and a base is fixedly mounted on the bottom of the pump housing.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] In the utility model, on the one hand, the vane pump realizes a detachable replacement of the blade head by arranging a bidirectional screw inside the blade, and through the cooperation of the bidirectional screw and the nut, solves the problem of blade head wear during long-term work and improves the practicality of the device itself. On the other hand, a two-stage filter is fixedly installed inside the oil suction pipe, and an activated carbon filter structure is arranged between the two filters, which avoids the wear of the pump body by impurities in the raw material itself and greatly improves the working efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a quantitative vane pump provided by the utility model;

[0017] Figure 2 This is a disassembled diagram of the overall structure of a quantitative vane pump provided by the utility model;

[0018] Figure 3 This is a schematic diagram of the interior of a rear cover of a quantitative vane pump provided by the utility model;

[0019] Figure 4 This is an exploded view of the blade portion of a quantitative vane pump provided by the utility model;

[0020] Figure 5This is an exploded diagram of the clamping structure of a quantitative vane pump provided by the utility model.

[0021] Legend: 1. Pump casing; 2. Oil suction pipe; 3. Oil outlet pipe; 4. Rotor; 5. Blade; 6. Replacement head; 7. Rubber strip; 8. Bidirectional screw; 9. Connecting rod; 10. Rotating shaft; 11. Oil distribution plate; 12. Rear cover; 13. Support seat; 14. Telescopic rod; 15. Support plate; 16. Protective cover; 17. Base. DETAILED DESCRIPTION

[0022] The following will combine 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, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to relevant references, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0024] Example 1

[0025] like Figure 1-5 As shown, the utility model provides a technical solution: a quantitative vane pump, including a pump housing 1, a rotating shaft 10 is rotatably connected to the interior of the pump housing 1, a stator is fixedly installed inside the pump housing 1, one end of the rotating shaft 10 is coaxially fixedly connected to a rotor 4, a plurality of grooves are provided inside the rotor 4, springs are fixedly installed in the grooves, a blade 5 is fixedly installed on the end of the spring away from the rotor 4, a bidirectional screw 8 is rotatably connected to the interior of the blade 5, both ends of the bidirectional screw 8 are screwed and connected with nuts, a connecting rod 9 is fixedly installed on the top of the nut, and a fastening plate is fixedly installed on the end of the connecting rod 9 away from the nut, and the bidirectional screw 8 is matched with the nut and arranged inside the blade 5, so that the vane pump can be easily replaced when it is worn out under long-term work;

[0026] One side of the pump housing 1 is fixedly connected to an oil suction pipe 2, and the other side is fixedly connected to an oil outlet pipe 3. Two layers of filter screens are fixedly installed inside the oil suction pipe 2. By arranging two layers of filter screens in the oil suction pipe 2, the transported oil is cleaned, avoiding subsequent damage to the pump body due to impurities in the oil;

[0027] Example 2

[0028] The end of the blade 5 away from the spring is movably connected to a replacement head 6, and the top of the replacement head 6 is movably connected to a rubber strip 7. The provision of the rubber strip 7 improves the practicality of the device and reduces the cost.

[0029] Example 3

[0030] A rear cover 12 is movably connected to one side of the pump housing 1, a support seat 13 is fixedly installed inside the rear cover 12, a telescopic rod 14 is fixedly installed on the top of the support seat 13, a damping shock absorber is provided inside the telescopic rod 14, a spring is sleeved on the outer periphery of the telescopic rod 14, a support plate 15 is fixedly installed on the top of the telescopic rod 14, a motor is fixedly installed on the side of the support plate 15 away from the telescopic rod 14, the output end of the motor is coaxially fixedly connected to the rotating shaft 10, the end of the rotating shaft 10 close to the motor is rotatably connected to the oil distribution plate 11, and the whole structure is driven to operate by the motor. In order to avoid the vibration and noise of the motor during operation affecting the pump body, the support seat 13 is fixedly installed in the rear cover 12, and a shock absorbing mechanism is provided above the support seat 13 to reduce the impact of vibration and noise;

[0031] Example 4

[0032] A protective cover 16 is hinged on one side of the pump housing 1 away from the rear cover 12 , and a base 17 is fixedly mounted on the bottom of the pump housing 1 . The protective cover 16 prevents the raw materials inside the pump housing from being contaminated, and the base 17 supports the entire structure.

[0033] The working process of this utility model:

[0034] Step 1: Turn on the motor. The motor output is coaxially connected to the shaft 10, driving the rotor 4, which is coaxially fixed to the shaft 10, to rotate, causing the blades 5 to move accordingly. Due to the centrifugal force of the blades 5, the pressure inside the pump decreases, creating a negative pressure. When the pressure at the suction pipe 2 is lower than the static pressure of the liquid, the liquid enters the pump housing 1 through the suction pipe 2.

[0035] In step 2, as rotor 4 continues to rotate, blades 5 push the oil further, compressing the liquid in the pump chamber and pushing it to outlet pipe 3. At this point, the space between blades 5 and pump housing 1 gradually decreases, causing the liquid pressure to increase. When the pressure reaches a certain value, the liquid flows out through outlet pipe 3.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixed displacement vane pump comprising a pump housing (1), characterized in that: The pump housing (1) is internally rotatably connected to a rotating shaft (10), a stator is fixedly installed inside the pump housing (1), one end of the rotating shaft (10) is coaxially fixedly connected to a rotor (4), a plurality of grooves are provided inside the rotor (4), springs are fixedly installed in the grooves, a blade (5) is fixedly installed at one end of the spring away from the rotor (4), a bidirectional screw (8) is internally rotatably connected to the blade (5), both ends of the bidirectional screw (8) are screwed and connected to nuts, a connecting rod (9) is fixedly installed on the top of the nut, and a fastening plate is fixedly installed at one end of the connecting rod (9) away from the nut; One side of the pump housing (1) is fixedly connected to an oil suction pipe (2), and the other side is fixedly connected to an oil outlet pipe (3). Two layers of filter screens are fixedly installed inside the oil suction pipe (2).

2. A quantitative vane pump according to claim 1, characterized in that: One end of the blade (5) away from the spring is movably connected to a replacement head (6), and the top of the replacement head (6) is movably connected to a rubber strip (7).

3. A quantitative vane pump according to claim 1, characterized in that: A rear cover (12) is movably connected to one side of the pump housing (1), and a support seat (13) is fixedly installed inside the rear cover (12).

4. A quantitative vane pump according to claim 3, characterized in that: A telescopic rod (14) is fixedly mounted on the top of the support seat (13), and a damping shock absorber is arranged inside the telescopic rod (14).

5. A quantitative vane pump according to claim 4, characterized in that: A spring is sleeved on the outer periphery of the telescopic rod (14), and a support plate (15) is fixedly mounted on the top of the telescopic rod (14).

6. A quantitative vane pump according to claim 5, characterized in that: A motor is fixedly mounted on one side of the support plate (15) away from the telescopic rod (14); an output end of the motor is coaxially fixedly connected to a rotating shaft (10); and an end of the rotating shaft (10) close to the motor is rotatably connected to an oil distribution plate (11).

7. A quantitative vane pump according to claim 1, characterized in that: A protective cover (16) is hingedly connected to the side of the pump housing (1) away from the rear cover (12) via a hinge, and a base (17) is fixedly mounted on the bottom of the pump housing (1).

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