Oil distribution structure of rotary oil distribution device

Abstract

The utility model relates to the technical field of hydraulic transmission, and discloses an oil distribution structure of a rotary oil distribution device, which comprises a static ring and a movable ring which are in radial running fit, the static ring is provided with a plurality of static ring oil holes for fluid media to circulate, and the movable ring is provided with movable ring oil holes corresponding to the static ring oil holes. The static ring and the moving ring are correspondingly provided with matched conical surfaces with the same taper, the static ring and the moving ring are in radial sliding fit through the matched conical surfaces, and the static ring and the moving ring are elastically connected through an elastic connecting piece. By arranging the oil distribution structure which is in conical surface fit and floating connection, machining and assembling errors and self-abrasion of all parts can be automatically compensated, a certain self-adaptive adjusting function is achieved, under the condition that sealing is not lost, the oil distribution efficiency and operation stability of the oil distribution device are guaranteed to the maximum extent, and the service life of the oil distribution device is prolonged. The oil distribution device can meet the use requirements of high-speed, high-pressure and large-flow working conditions, and fills the technical blank in the field of oil distribution devices under the high-speed, high-pressure and large-flow working conditions in China.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic transmission, in particular to an oil distribution structure of a rotary oil distribution device. Background Art

[0002] The rotary oil distribution device is a connecting component that inputs fluid media (liquid, gas) from a stationary pipeline to a rotating device. Among them, the rotary oil distribution device used to transport media for equipment such as rotary hydraulic cylinders is commonly known as an adapter; the rotary oil distribution device used to transport media for hydraulic pumps and hydraulic motors is called an oil distribution plate. The rotary oil distribution device usually adopts radial oil distribution or axial end face oil distribution, and realizes the supply of fluid media from a stationary pipeline to a rotating device through a rotating matching oil distribution structure.

[0003] At present, the oil distribution structure in the rotary oil distribution device mostly adopts the contact seal form. This structure is easy to wear the seal during use, resulting in poor sealing and short service life of the rotary oil distribution device. Some of them also adopt the structure of gap sealing, but the sealing gap of the oil distribution structure is difficult to control. When the gap is too small, frictional heat is easy to occur, causing the oil distribution structure to expand thermally, forming a contact seal, and even locking; when the gap is too large, the leakage is too large and the oil distribution efficiency is low. As a result, under low-speed and low-pressure conditions, domestically produced rotary oil distribution devices still occupy a part of the market share. However, under high-speed, high-pressure, and large-flow conditions, domestic products often cannot meet market demand.

[0004] In view of this, developing an oil distribution structure that can meet the requirements of high-speed, high-pressure, and large-flow working conditions and applied to rotary oil distribution devices to obtain application effects such as good sealing performance, smooth operation, and long service life has become an urgent problem to be solved by technicians in this field. Utility Model Content

[0005] The purpose of the utility model is to provide an oil distribution structure of a rotary oil distribution device in view of the above problems, so as to solve the problems of low oil distribution efficiency, short service life, poor sealing effect, easy high-temperature locking, and inability to meet the use requirements of high-speed, high-pressure and large-flow working conditions of the existing rotary oil distribution device.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] An oil distribution structure of a rotary oil distribution device comprises a stationary ring and a dynamic ring which are radially rotatably matched, the stationary ring is provided with a plurality of stationary ring oil holes for the circulation of a fluid medium, the dynamic ring is provided with dynamic ring oil holes corresponding to the stationary ring oil holes, the stationary ring and the dynamic ring are correspondingly provided with matching conical surfaces of the same taper, the stationary ring and the dynamic ring are radially slidably matched through the matching conical surfaces, and the stationary ring and the dynamic ring are elastically connected through an elastic connecting piece, so that the stationary ring and the dynamic ring have a certain axial degree of freedom.

[0008] Preferably, the elastic connecting member comprises a wave spring arranged corresponding to the stationary ring, and the wave spring is arranged between the stationary ring and the stop seat to press the stationary ring circumferentially against the dynamic ring.

[0009] Preferably, a pre-tightening bolt is provided on the block seat corresponding to the wave spring, so as to adjust the pre-tightening force of the wave spring on the static ring.

[0010] Preferably, the elastic connecting member includes a balancing plunger arranged on the stationary ring, and a balancing oil chamber connected to the stationary ring oil hole is opened on the stationary ring. The balancing plunger is telescopically connected to the balancing oil chamber, and the front end of the balancing plunger is arranged corresponding to the block seat. A part of the fluid medium flowing through the stationary ring oil hole will pass into the balancing oil chamber to push the balancing plunger to extend and press against the block seat.

[0011] Preferably, the elastic connecting member is arranged corresponding to the moving ring, the elastic connecting member is arranged between the stopper and the mover, the balancing plunger is telescopically connected to the balancing oil chamber provided on the moving ring, and the balancing oil chamber is connected to the oil hole of the moving ring.

[0012] Preferably, the oil distribution structure is provided with two sets, and the two sets of oil distribution structures are arranged in a mirror-like manner, one set of oil distribution structures is connected to the oil inlet of the oil supply device, and the other set of oil distribution structures is connected to the return oil, and the dynamic ring oil holes of the two sets of oil distribution structures are respectively used to connect the oil inlet end and the oil return end of the external rotating equipment.

[0013] Preferably, the oil distribution structure is applied to a plunger pump, the moving ring is connected to the connecting shaft of the plunger pump and rotates synchronously with the connecting shaft, the stationary ring fixedly connected to the housing of the plunger pump is radially slidably matched with the moving ring through a matching conical surface, and the oil distribution of the plunger pump is completed through the stationary ring oil hole and the moving ring oil hole, and the elastic connecting piece is arranged corresponding to the housing end cover of the plunger pump.

[0014] Preferably, the oil distribution structure is applied to a hydraulic motor, the static ring is connected to the motor rotor and rotates synchronously with the rotor, and the dynamic ring is connected to the connecting shaft of the oil supply device to supply oil to the motor.

[0015] The beneficial effects of the utility model are:

[0016] The utility model makes the oil distribution structure floatingly connected, so that the oil distribution structure has a certain adaptive adjustment ability, and can adaptively adjust the matching relationship with the temperature and working conditions, avoiding the oil distribution structure being heated and expanded during the working process, and the tight matching with the rotating shaft or the shell, resulting in low oil distribution efficiency or even locking of the device. Without losing the seal, the oil distribution efficiency and operation stability of the oil distribution device are guaranteed to the maximum extent, and the service life is extended. The utility model can meet the use requirements of high-speed, high-pressure, and large-flow working conditions, filling the technical gap in the field of oil distribution devices in my country under high-speed, high-pressure, and large-flow working conditions.

[0017] In the utility model, the dynamic ring cooperates with the conical surface of the static ring and is elastically connected by an elastic connecting piece, so that the static ring and the dynamic ring have a certain axial degree of freedom. When the oil distribution structure is affected by temperature changes or the size changes due to wear, a certain axial displacement will occur between the static ring and the dynamic ring and act on the elastic connecting piece to absorb the deformation, thereby always keeping the matching conical surfaces of the two tightly matched, effectively reducing the leakage of the fluid medium and ensuring a higher volumetric efficiency.

[0018] The setting of the wave spring and the balancing plunger provides an axial force component to overcome the fluid medium on the oil distribution structure, and the thrust can be adaptively adjusted with the changes in working conditions and loads, maintaining the dynamic balance of the preload force of the static ring and the dynamic ring conical surface, eliminating the problem of fluid medium leakage due to excessive gap, and avoiding the situation of high temperature locking caused by excessive preload. The utility model has a simple structure, and most of the parts are annular structures, which are easy to process and manufacture, and the processing accuracy is easy to control. At the same time, the oil distribution structure with a conical surface and a floating connection can automatically compensate for the processing and assembly errors of each component, reduce the processing and assembly accuracy requirements of the parts, and effectively save manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Figure 1 It is a schematic diagram of the explosion structure of the utility model.

[0021] Figure 2 It is a cross-sectional schematic diagram of the utility model.

[0022] Figure 3 It is a partial view of a preferred embodiment of the utility model.

[0023] Figure 4 This is a schematic diagram of the structure of the utility model applied to a plunger pump

[0024] Figure 5 The utility model is a structural schematic diagram applied to a hydraulic motor.

[0025] In the figure: 1--stationary ring; 11--stationary ring oil hole; 2--dynamic ring; 21--dynamic ring oil hole; 3--matching cone surface; 4--elastic connecting piece; 41--wave spring; 42--blocking seat; 43--pre-tightening bolt; 44--balancing plunger; 45--balancing oil chamber. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] like Figure 1-5 As shown, an oil distribution structure of a rotary oil distribution device includes a stationary ring 1 for connecting an oil supply device and a moving ring 2 for connecting an external rotating device, wherein the stationary ring 1 and the moving ring 2 are radially rotated in cooperation. The stationary ring 1 is provided with a plurality of stationary ring oil holes 11 for fluid medium to flow through, and the stationary ring oil holes 11 are connected to the oil supply device. The moving ring 2 is provided with moving ring oil holes 21 corresponding to the stationary ring oil holes 11, and the moving ring oil holes 21 are connected to the external rotating device, and the high-pressure fluid medium input from the stationary ring oil holes 11 is supplied to the external rotating device.

[0028] When in use, the oil inlet and oil return ends of the external rotating device are respectively connected to the moving ring oil hole 21. Driven by the external rotating device, the moving ring 2 starts to rotate relative to the stationary ring 1. The high-pressure fluid medium supplied by the oil supply device sequentially passes through the stationary ring oil hole 11 and the moving ring oil hole 21 to enter the oil inlet end of the external rotating device to supply oil to the external rotating device. At the same time, the low-pressure fluid medium discharged by the external rotating device sequentially passes through the moving ring oil hole 21 and the stationary ring oil hole 11 of the oil distribution structure and flows back to the oil storage tank, forming an oil distribution cycle for the external rotating device.

[0029] In order to improve the problems of low oil distribution efficiency, short life, high temperature locking and inability to meet the requirements of high-speed, high-pressure and large-flow working conditions in traditional oil distribution devices, the utility model sets the oil distribution structure as a floating connection structure, so that the oil distribution structure has a certain adaptive adjustment function, and can adaptively adjust the matching relationship with changes in temperature and working conditions, thereby maximally ensuring the oil distribution efficiency and operating stability of the oil distribution device without losing the seal.

[0030] Specifically, Figure 1-2 As shown, the inner diameter of the stationary ring 1 and the outer diameter of the dynamic ring 2 are provided with a matching cone surface 3 of the same taper, and the stationary ring 1 and the dynamic ring 2 are radially slidably matched through the matching cone surface 3, and the stationary ring 1 and the dynamic ring 2 are elastically connected through the elastic connector 4, so that the stationary ring 1 and the dynamic ring 2 have a certain axial degree of freedom. When the oil distribution structure is affected by the working conditions and temperature changes or the size changes due to wear, a certain axial displacement will be generated between the stationary ring 1 and the dynamic ring 2 and act on the elastic connector 4 to absorb the deformation of the oil distribution structure, so as to achieve adaptive adjustment, so as to always keep the matching cone surface 3 of the two closely matched. Effectively reduce the leakage of fluid medium and ensure high volumetric efficiency. To meet the use requirements of high-speed, high-pressure and large-flow conditions. And the oil distribution structure floatingly connected by the elastic connector 4 can automatically compensate for the processing and assembly errors of each component, reduce the processing and assembly precision requirements of parts, and effectively save manufacturing costs.

[0031] Preferably, the elastic connector 4 includes a wave spring 41 arranged corresponding to the stationary ring 1, and the wave spring 41 is arranged between the stationary ring 1 and the stopper 42 to circumferentially press the stationary ring 1 against the dynamic ring 2 to achieve a tight conical fit between the two.

[0032] Furthermore, if Figure 3 As shown, a pre-tightening bolt 43 is provided on the stopper 42 corresponding to the wave spring 41, which is used to adjust the pre-tightening force of the wave spring 41 on the stationary ring 1 to meet the use requirements of different loads and working conditions.

[0033] Due to the influence of different working conditions and loads, there will be obvious differences in the pressure of the fluid medium flowing through the oil distribution structure during operation, which will cause the axial component force acting on the static ring 1 to change accordingly. The constant preload force provided by the wave spring 41 cannot meet the use requirements of all working conditions and loads. A fit gap is likely to occur between the static ring 1 and the dynamic ring 2, resulting in fluid medium leakage or excessively tight fit to generate high temperature.

[0034] In order to improve the above-mentioned problem, the elastic connector 4 includes a balancing plunger 44 arranged on the stationary ring 1, which is used to provide a balanced adjustment of the preload force of the conical surface of the stationary ring 1 and the dynamic ring 2. Specifically, a balancing oil chamber 45 connected to the stationary ring oil hole 11 is provided on the stationary ring 1, and the balancing plunger 44 is telescopically connected to the balancing oil chamber 45, and the front end of the balancing plunger 44 is arranged corresponding to the stopper 42. When in use, a part of the fluid medium flowing through the stationary ring oil hole 11 will pass into the balancing oil chamber 45 to push the balancing plunger 44 out and press against the stopper 42, thereby generating a reaction force on the stationary ring 1, which serves as a balanced preload force to press the stationary ring 1. In this embodiment, the balancing oil chamber 45 is connected to the stationary ring oil hole 11 to provide different oil pressures for the balancing plunger 44, thereby providing the balancing plunger 44 with different thrusts to overcome the axial force of the fluid medium on the stationary ring 1, and the thrust can be adaptively adjusted with the changes in working conditions and loads, maintaining the dynamic balance of the preload force of the conical surface of the stationary ring 1 and the dynamic ring 2, eliminating the problem of fluid medium leakage due to excessive gaps, and avoiding the situation of high-temperature locking caused by excessive preload force. This embodiment allows the dynamic ring 2 to be integrally processed and formed with the connecting shaft of the external rotating equipment, eliminating the trouble of separate processing of the dynamic ring 2, ensuring processing accuracy, and reducing assembly difficulty.

[0035] As another embodiment, Figure 3 As shown, the elastic connector 4 can also be arranged corresponding to the moving ring 2. Specifically, a stopper 42 is arranged on the connecting shaft of the external device, and the elastic connector 4 is arranged between the stopper 42 and the mover. In this embodiment, the balancing plunger 44 is telescopically connected to the balancing oil chamber 45 provided on the moving ring 2, and the balancing oil chamber 45 is connected to the moving ring oil hole 21. In this embodiment, the stationary ring 1 can be integrally processed and formed with the housing, thereby reducing the assembly error of the oil distribution structure.

[0036] As a preferred embodiment, the oil distribution structure is provided with two sets, and the two sets of oil distribution structures are arranged in a mirror image. One set of oil distribution structures is connected to the oil inlet of the oil supply device, and the other set of oil distribution structures is connected to the oil return port. The movable ring oil holes 21 of the two sets of oil distribution structures are respectively used to connect the oil inlet end and the oil return end of the external rotating equipment. The configuration of the two sets of oil distribution structures enables the oil supply and oil return steps in the oil distribution operation to be completed through independent oil distribution structures, which can effectively improve the oil distribution efficiency.

[0037] It should be noted that the oil distribution structure provided by the utility model can be applied to an independent oil distribution plate or a rotary joint, and its housing configuration, oil inlet and return interface, and the connection method of the external rotating device can adopt the conventional settings in the prior art. At the same time, the utility model can also be integrated in a hydraulic pump and a hydraulic motor, and the hydraulic pump and the hydraulic motor can be used as external rotating equipment. The specific configuration can be adaptively set according to the prior art and will not be repeated here. The utility model provides an oil distribution structure for a rotating oil distribution device, and does not involve improvements to the housing, connection configuration, etc. of the rotating oil distribution device itself. In the utility model, the static ring 1 and the dynamic ring 2 are named according to whether the oil distribution device rotates during operation. The configurations of the static ring 1 and the dynamic ring 2 can be interchanged according to actual use requirements to adapt to different application scenarios.

[0038] like Figure 4 The figure shows a schematic diagram of the application of the oil distribution structure provided by the utility model on a traditional plunger pump. In this embodiment, the moving ring 2 is connected to the connecting shaft of the plunger pump and rotates synchronously with the connecting shaft. The stationary ring 1 fixedly connected to the housing of the plunger pump is radially slidably matched with the moving ring 2 through the matching conical surface 3, and the oil distribution of the plunger pump is completed through the stationary ring oil hole 11 and the moving ring oil hole 21. The elastic connecting member 4 is arranged corresponding to the housing end cover of the plunger pump to obtain a corresponding reaction force and realize the floating connection of the oil distribution structure.

[0039] like Figure 5 The figure is a schematic diagram of the application of the oil distribution structure provided by the utility model on a hydraulic motor. In this embodiment, the stationary ring 1 is connected to the motor rotor and rotates synchronously with the rotor, and the dynamic ring 2 is connected to the connecting shaft of the oil supply device to supply oil to the motor.

[0040] The above disclosure is only a specific embodiment of the present invention, but the present invention is not limited thereto. For ordinary technicians in this field, without departing from the principle of the present invention, any deformation made should be regarded as belonging to the protection of the present invention.

Claims

1. An oil distribution structure of a rotary oil distribution device, characterized in that: The invention comprises a stationary ring (1) and a movable ring (2) which are radially rotatably matched. The stationary ring (1) is provided with a plurality of stationary ring oil holes (11) through which a fluid medium can flow. The movable ring (2) is provided with movable ring oil holes (21) corresponding to the stationary ring oil holes (11). The stationary ring (1) and the movable ring (2) are provided with matching conical surfaces (3) of the same taper. The stationary ring (1) and the movable ring (2) are radially slidably matched via the matching conical surfaces (3). The stationary ring (1) and the movable ring (2) are elastically connected via an elastic connecting piece (4), so that a certain degree of axial freedom is provided between the stationary ring (1) and the movable ring (2).

2. The oil distribution structure of a rotary oil distribution device according to claim 1, characterized in that: The elastic connecting member (4) comprises a wave spring (41) arranged corresponding to the stationary ring (1); the wave spring (41) is arranged between the stationary ring (1) and the stop seat (42) to press the stationary ring (1) against the dynamic ring (2) in the circumferential direction.

3. The oil distribution structure of a rotary oil distribution device according to claim 2, characterized in that: A pre-tightening bolt (43) is provided on the stopper (42) corresponding to the wave spring (41) and is used to adjust the pre-tightening force of the wave spring (41) on the stationary ring (1).

4. The oil distribution structure of a rotary oil distribution device according to claim 1, characterized in that: The elastic connecting member (4) comprises a balancing plunger (44) arranged on the stationary ring (1); a balancing oil chamber (45) communicating with the stationary ring oil hole (11) is provided on the stationary ring (1); the balancing plunger (44) is telescopically connected to the balancing oil chamber (45); and the front end of the balancing plunger (44) is arranged corresponding to the stopper (42).

5. The oil distribution structure of a rotary oil distribution device according to claim 1, characterized in that: The elastic connecting member (4) is arranged corresponding to the moving ring (2), the elastic connecting member (4) is arranged between the stopper (42) and the mover, the balancing plunger (44) is telescopically connected to a balancing oil chamber (45) provided on the moving ring (2), and the balancing oil chamber (45) is connected to the moving ring oil hole (21).

6. The oil distribution structure of a rotary oil distribution device according to claim 1, characterized in that: The oil distribution structure is provided with two sets, which are arranged in mirror image, one set of the oil distribution structure is connected to the oil inlet of the oil supply device, and the other set of the oil distribution structure is connected to the oil return, and the movable ring oil holes (21) of the two sets of oil distribution structures are respectively used to connect the oil inlet end and the oil return end of the external rotating equipment.

7. The oil distribution structure of a rotary oil distribution device according to claim 1, characterized in that: The oil distribution structure is applied to a plunger pump, wherein the moving ring (2) is connected to a connecting shaft of the plunger pump and rotates synchronously with the connecting shaft, the stationary ring (1) fixedly connected to the housing of the plunger pump is radially slidably matched with the moving ring (2) via a matching conical surface (3), and the oil distribution of the plunger pump is completed via the stationary ring oil hole (11) and the moving ring oil hole (21), and the elastic connecting member (4) is arranged corresponding to the housing end cover of the plunger pump.

8. The oil distribution structure of a rotary oil distribution device according to claim 1, characterized in that: The oil distribution structure is applied to a hydraulic motor, wherein the static ring (1) is connected to the motor rotor and rotates synchronously with the rotor, and the dynamic ring (2) is connected to the connecting shaft of the oil supply device to supply oil to the motor.

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