Inner curve two-way radial pump with reset spring plunger
By introducing a combined structure of a return spring and an inner curve ring into the radial pump, the problems of hydraulic imbalance and flow matching in the prior art are solved, and reliable operation and efficient pumping are achieved in high-pressure and small flow occasions.
Patent Information
- Application Number
- CN202411421615.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2024-12-13
AI Technical Summary
Due to hydraulic imbalance, existing radial plunger pumps are limited to the low pressure range and cannot be used in high pressure occasions, and the eccentric structure efficiency of small flow applications is low.
Design an inner curve bidirectional radial pump with a return spring. By installing multiple inner cavity holes and plunger components on the cylinder, and using a combined structure of the return spring and the inner curve ring, the bidirectional function and flow matching of the plunger are achieved. , avoid imbalance forces caused by asymmetric structures.
It realizes reliable operation under low-speed operating conditions, improves pressure levels, has a wide range of applications, and the number of plungers can be matched according to flow rate, which is suitable for high-pressure and small flow rates.
Smart Images
Figure CN119122772A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a radial pump, in particular to an inner curve bidirectional radial pump with a return spring plunger. Background Art
[0002] At present, radial piston pumps are widely used in various hydraulic equipment such as engineering machinery and forging machinery for high pressure and large flow applications. At present, this type of pump basically adopts the structure of flow distribution shaft plus sliding shoe. For some applications with small flow, the eccentric structure of shaft flow distribution is currently adopted to complete the oil suction and discharge of the plunger through centrifugal force. However, due to the inherent hydraulic imbalance, they are usually limited to work in the low pressure range and cannot be used in high pressure applications. The product application is limited. Summary of the invention
[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides an inner curve bidirectional radial pump with a return spring plunger, which can realize a bidirectional function and the number of plungers can be matched according to the actual required flow rate.
[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: an inner curve bidirectional radial pump with a return spring plunger, comprising an oil pump front end cover, a motor pump connecting shaft, a cylinder body, an oil pump main block, an oil pump rear end cover, an oil distribution shaft, a return spring, an inner curve ring, and a plunger assembly. The cylinder body is provided with a plurality of inner cavity holes, and plunger assemblies are respectively installed in the plurality of inner cavity holes. The plunger assembly consists of a plunger and a roller, and return springs are respectively installed on both sides of the cylinder body and the roller; an inner curve ring is installed inside the oil pump main block, and the inner curve ring fits tightly with the plunger assembly.
[0005] Furthermore, the number of the plunger assemblies is matched according to the actual required flow rate, and the number of the plunger assemblies is set to an even number.
[0006] Furthermore, a distribution shaft is installed inside the cylinder body, and two working oil ports are provided on the distribution shaft to switch oil suction and oil discharge respectively. Oil ports corresponding to the number of plunger assemblies are provided at the matching position of the cylinder body and the plunger assembly, and are interconnected.
[0007] Furthermore, the front end cover, the oil pump main block, and the rear end cover are fastened together by screws, and sealing rings are installed on the front end cover and the rear end cover for radial sealing to prevent oil leakage at the joint surface between the front and rear end covers and the oil pump main block.
[0008] Furthermore, when the cylinder body rotates under the drive of the motor, the plunger assembly fits with the inner curve ring under the combined action of centrifugal force and the return spring. When the closed cavity formed by the plunger assembly and the cylinder body gradually becomes larger, oil suction is completed through the channel on the oil distribution shaft; conversely, when the closed cavity formed by the plunger assembly and the cylinder body gradually becomes smaller under the action of the inner curve ring, oil discharge is completed through the channel on the oil distribution shaft; when the motor reverses, the oil suction and discharge functions of the two oil ports are interchanged to realize the bidirectional function of the radial pump.
[0009] The advantages and beneficial effects of the present invention are:
[0010] 1) Return springs are installed on both sides of the cylinder body and the roller, so that the plunger assembly can fit with the inner curve ring not only by centrifugal force, but also by the spring force of the return spring, which can ensure that the radial pump can work reliably under low-speed conditions;
[0011] 2) Different from the axial flow distribution radial pump that generally adopts the eccentricity form, this radial pump adopts the inner curve ring with symmetrical structure and the internal main body structure is symmetrical, which avoids the unbalanced force generated during the operation of the pump due to the asymmetric structure and improves the pressure level;
[0012] 3) The number of plungers can be matched according to the actual required flow rate, with a high degree of modularity and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is an axial cross-sectional view of the inner-curve radial pump of the present invention;
[0014] Figure 2 It is a radial cross-sectional view and oil port arrangement view of the inner curve radial pump of the present invention;
[0015] Figure 3 yes Figure 2 E-direction view in;
[0016] Figure 4 is a schematic cross-sectional structural diagram of the plunger assembly of the present invention;
[0017] Figure markings: 1-front cover of oil pump, 2-motor pump connecting shaft, 3-cylinder body, 4-main block of oil pump, 5-rear cover of oil pump, 6-oil distribution shaft, 7-return spring, 8-inner curve ring, 9-plunger assembly, 9-1-plunger, 9-2-roller. DETAILED DESCRIPTION
[0018] In order to facilitate the understanding of the present invention, the present invention is described in more detail below, and the accompanying drawings show an implementation example of the present invention. The present invention can be implemented in different forms and is not limited to this implementation example.
[0019] like Figures 1 to 4As shown, an embodiment of the present invention provides an inner curve bidirectional radial pump with a return spring plunger, comprising an oil pump front end cover 1, a motor pump connecting shaft 2, a cylinder body 3, an oil pump main block 4, an oil pump rear end cover 5, an oil distribution shaft 6, a return spring 7, an inner curve ring 8, and a plunger assembly 9.
[0020] Among them, the front end cover 1, the oil pump main block 4, and the rear end cover 5 are fastened together by screws, and sealing rings are installed on the front end cover 1 and the rear end cover 5 for radial sealing to prevent oil leakage at the joint surface between the front and rear end covers 5 and the oil pump main block 4.
[0021] A plurality of inner holes are provided on the cylinder body 3, and a plunger assembly 9 is installed in each inner hole. The plunger assembly 9 is composed of a plunger 9-1 and a roller 9-2. Reset springs 7 are respectively installed on both sides of the cylinder body 3 and the roller 9-2. An inner curve ring 8 is installed inside the main block 4 of the oil pump, and the inner curve ring 8 is tightly fitted with the plunger assembly 9.
[0022] A distribution shaft 6 is installed inside the cylinder body 3. Two working oil ports are provided on the distribution shaft 6 to switch oil suction and oil discharge respectively. Oil ports corresponding to the number of the plunger assemblies 9 are provided at the matching position of the cylinder body 3 and the plunger assembly 9, and the ports are connected to each other.
[0023] When the cylinder body 3 rotates under the drive of the motor connected to the motor pump connecting shaft 2, the plunger assembly 9 fits with the inner curve ring 8 under the combined action of centrifugal force and the return spring 7. When the closed cavity formed by the plunger assembly 9 and the cylinder body 3 gradually becomes larger, oil suction is completed through the channel on the oil distribution shaft 6; conversely, when the closed cavity formed by the plunger assembly 9 and the cylinder body 3 gradually becomes smaller under the action of the inner curve ring 8, oil discharge is completed through the channel on the oil distribution shaft 6; when the motor reverses, the oil suction and discharge functions of the two oil ports are interchanged to realize the bidirectional function of the radial pump.
[0024] The above implementation case only illustrates one of the design schemes of the present invention and cannot be understood as a limitation on the patent of the present invention. Based on this implementation case, the inner curve radial pump of the present invention can also be improved to a certain extent. Therefore, the scope of patent protection of the present invention shall be based on the attached claims.
Claims
1. An inner curve bidirectional radial pump with a return spring plunger, comprising a front end cover of an oil pump, a motor pump connecting shaft, a cylinder body, a main block of an oil pump, a rear end cover of an oil pump, an oil distribution shaft, a return spring, an inner curve ring, and a plunger assembly, characterized in that: The cylinder body is provided with a plurality of inner cavity holes, in which plunger assemblies are respectively installed, the plunger assemblies are composed of a plunger and a roller, and return springs are respectively installed on both sides of the cylinder body and the roller; an inner curve ring is installed inside the main block of the oil pump, and the inner curve ring is tightly fitted with the plunger assembly.
2. The inner curve bidirectional radial pump with a return spring plunger according to claim 1, characterized in that: The number of the plunger assemblies is matched according to the actual required flow rate, and the number of the plunger assemblies is set to an even number.
3. The inner curve bidirectional radial pump with a return spring plunger according to claim 1, characterized in that: The cylinder body is provided with a distribution shaft inside, on which two working oil ports are arranged for switching oil suction and oil discharge respectively. The oil ports corresponding to the number of the plunger assemblies are arranged at the matching position of the cylinder body and the plunger assembly, and are interconnected.
4. The inner curve bidirectional radial pump with return spring plunger according to claim 1, characterized in that: The front end cover, the oil pump main block and the rear end cover are fastened together by screws. Sealing rings are installed on the front end cover and the rear end cover for radial sealing to prevent oil leakage at the joint surface between the front and rear end covers and the oil pump main block.
5. The inner curve bidirectional radial pump with return spring plunger according to claim 1, characterized in that: When the cylinder body rotates under the drive of the motor, the plunger assembly fits with the inner curve ring under the combined action of centrifugal force and the return spring. When the closed cavity formed by the plunger assembly and the cylinder body gradually becomes larger, oil suction is completed through the channel on the oil distribution shaft; conversely, when the closed cavity formed by the plunger assembly and the cylinder body gradually becomes smaller under the action of the inner curve ring, oil discharge is completed through the channel on the oil distribution shaft; when the motor reverses, the oil suction and discharge functions of the two oil ports are interchanged to realize the bidirectional function of the radial pump.