Low noise trochoidal hydraulic motor

Abstract

The utility model discloses a low noise's cycloid hydraulic motor, it includes rotor, stator, needle tooth and valve disc, rotor is assembled in the inner periphery of stator, valve disc is assembled in the outer periphery of stator, rotor and valve disc end face cooperation, needle tooth is located the outside of rotor and sets up on stator, the inner surface of needle tooth and rotor cooperation, the outer surface of needle tooth and the circular recess of stator cooperation, three form stator rotor oil cavity, be equipped with rotor seal zone in rotor, and rotor seal zone will be divided into low pressure B cavity and high pressure A cavity with rotor, low pressure B cavity, high pressure A cavity is located respectively in the inside and outside two sides of rotor seal zone, be equipped with a plurality of oil distribution groove on valve disc, be equipped with unloading groove on oil distribution groove, and oil distribution groove passes through unloading groove and is communicated with low pressure B cavity or high pressure A cavity respectively, be equipped with first oil passage and second oil passage on valve disc, and high pressure A cavity, low pressure B cavity passes through oil distribution groove and second oil passage and is communicated with stator rotor oil cavity respectively. The utility model discloses can effectively solve the noise problem that motor produces in actual operation process.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic technology, specifically to a low-noise cycloidal hydraulic motor. Background Technology

[0002] Cycloidal hydraulic motors are widely used in engineering machinery, agricultural machinery, and fishery machinery due to their simple structure, small size, wide speed range, and high torque. The oil distribution in a cycloidal hydraulic motor is achieved through the rotor and distributor plate, which converts the hydraulic energy into mechanical energy within the oil chamber formed by the stator. During operation, the high-pressure hydraulic oil drives the rotor to rotate, and the rotor then revolves within the stator, thus converting hydraulic energy into mechanical energy.

[0003] Currently, cycloidal hydraulic motors cause walking noise during customer installation and testing due to pressure impact or cavitation in the transition chamber during operation. This noise affects the efficiency of customer installation as staff work under these conditions. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the existing technology by providing a low-noise cycloidal hydraulic motor, which can effectively solve the noise problem generated by the motor during actual operation and significantly improve the installation efficiency for customers.

[0005] The technical solution adopted in this utility model is as follows: A low-noise cycloidal hydraulic motor includes a rotor, a stator, pin teeth, and a valve disc. The rotor is mounted on the inner circumference of the stator, and the valve disc is mounted on the end face of the stator, with the rotor engaging with the end face of the valve disc. The pin teeth are located on the outer side of the rotor and mounted on the stator, with the inner surface of the pin teeth engaging with the rotor and the outer surface of the pin teeth engaging with the arcuate groove of the stator. These three components form a rotor-stator oil chamber. A rotor sealing strip is provided inside the rotor, dividing the rotor interior into a low-pressure chamber (B chamber) and a high-pressure chamber (A chamber). Located on the inner and outer sides of the rotor sealing strip, the valve disc has multiple oil distribution grooves, each with an unloading groove. The oil distribution grooves are connected to either the low-pressure B chamber or the high-pressure A chamber. The valve disc has a first oil passage and a second oil passage. The motor external oil port A is connected to the high-pressure A chamber through the housing oil passage and the first oil passage on the valve disc. The motor external oil port B is connected to the low-pressure B chamber through the housing oil passage. The high-pressure A chamber and the low-pressure B chamber are connected to the stator and rotor oil chambers through the internal oil passages and the second oil passage of the oil distribution grooves, respectively.

[0006] Preferably, the needle teeth are cylindrical metal rods.

[0007] Preferably, the valve disc is provided with seven oil distribution grooves, which are connected to the low-pressure B chamber or the high-pressure A chamber respectively through their internal oil passages.

[0008] Preferably, the unloading groove is circular, triangular, or straight.

[0009] Preferably, the length of the unloading groove is no more than 2mm.

[0010] The beneficial effects of this utility model are as follows: By setting an unloading groove on the oil distribution groove of the valve disc, when the oil distribution groove of the valve disc is a transition sealing cavity, the unloading groove connects the transition cavity with the high pressure A cavity or the low pressure B cavity for pressure relief or oil replenishment, thereby solving the problem of motor operating noise caused by pressure impact or cavitation, and greatly improving the installation efficiency of customers. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; In the diagram: 1. Rotor; 2. Stator; 3. Needle tooth; 4. Stator and rotor oil chamber; 5. Valve disc; 6. Rotor sealing strip; 7. Oil distribution groove; 8. First oil passage; 9. Second oil passage; 10. Unloading groove; 11. Low-pressure chamber B; 12. High-pressure chamber A. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings: like Figure 1 As shown, the present invention discloses a low-noise cycloidal hydraulic motor comprising a rotor 1, a stator 2, a pin tooth 3, and a valve disc 5. The rotor 1 is mounted on the inner circumference of the stator 2, and the valve disc 5 is mounted on the end face of the stator 2. The rotor 1 and the end face of the valve disc 5 are engaged. The pin tooth 3 is located on the outer side of the rotor 1 and is mounted on the stator 2. The pin tooth 3 is a cylindrical metal rod. The inner surface of the pin tooth 3 engages with the rotor 1, and the outer surface of the pin tooth 3 engages with the arc groove of the stator 2. The three components together form a stator-rotor oil chamber 4.

[0013] The rotor 1 of this utility model is provided with a rotor sealing strip 6 inside. The rotor sealing strip 6 divides the inside of the rotor 1 into a low-pressure B cavity 11 and a high-pressure A cavity 12. The low-pressure B cavity 11 and the high-pressure A cavity 12 are located on the inner and outer sides of the rotor sealing strip 6, respectively.

[0014] The valve disc 5 of this utility model is provided with seven oil distribution grooves 7, which are a~g respectively; the oil distribution grooves 7 are provided with unloading grooves 10, and the oil distribution grooves 7 are respectively connected to the low pressure B chamber 11 or the high pressure A chamber 12; when the oil distribution grooves 7 of the valve disc 5 are closed chambers, the unloading grooves 10 connect the closed chambers to the high pressure A chamber 12 or the low pressure B chamber 11 to release pressure or replenish oil, thereby solving the problem of motor operating noise caused by pressure impact or cavitation, and greatly improving the installation efficiency of customers.

[0015] In this utility model, the valve disc 5 is provided with a first oil passage 8 and a second oil passage 9. The motor external oil port A is connected to the high pressure A chamber 12 through the housing oil passage and the first oil passage 8 on the valve disc 5; the motor external oil port B is connected to the low pressure B chamber 11 through the housing oil passage; the high pressure A chamber 12 and the low pressure B chamber 11 are respectively connected to the stator and rotor oil chambers 4 through the internal oil passage of the oil distribution groove 7 and the second oil passage 9, which facilitates the delivery of hydraulic oil.

[0016] The unloading groove 10 in this utility model is circular, triangular or straight groove in shape, and the length of the unloading groove 10 is no more than 2mm, so as not to damage the original end face sealing characteristics of the rotor 1 and the valve disc 5.

[0017] The usage process of this utility model is as follows: In use, the oil distribution grooves 7 of a~g are respectively connected to the oil chambers of a'~g' through the oil passages inside the valve disc 5. If the cavity in the oil distribution groove 7 of a~g is located in the low-pressure B chamber 11, then it is connected to the low-pressure B chamber 11; if the cavity in the oil distribution groove 7 of a~g is located in the high-pressure A chamber 12, then it is connected to the high-pressure A chamber 12; the oil distribution groove 7 of f is completely covered by the rotor sealing strip 6 set inside the rotor 1, and is neither connected to the low-pressure B chamber 11 nor to the high-pressure A chamber 12, thus forming a sealed cavity. When the volume of cavity f', which is connected to oil tank 7, decreases, it will compress the volume of cavity f', causing a pressure shock. When the volume of cavity f' increases, cavitation will occur due to the lack of oil replenishment. Both situations will cause noise. At this time, unloading tank 10 connects the sealed cavity to high pressure cavity A 12 or low pressure cavity B 11 to release pressure or replenish oil, thereby solving the problem of motor operating noise caused by pressure shock or cavitation, and greatly improving the customer's installation efficiency.

[0018] Other undescribed parts of this utility model are the same as those in the prior art.

Claims

1. A low-noise cycloidal hydraulic motor, characterized in that... It includes a rotor (1), a stator (2), pin teeth (3), and a valve disc (5). The rotor (1) is mounted on the inner circumference of the stator (2), and the valve disc (5) is mounted on the end face of the stator (2). The rotor (1) mates with the end face of the valve disc (5). The pin teeth (3) are located on the outside of the rotor (1) and are disposed on the stator (2). The inner surface of the pin teeth (3) mates with the rotor (1), and the outer surface of the pin teeth (3) mates with the arc groove of the stator (2). The three components together form a rotor-stator oil chamber (4). The rotor (1) is provided with a rotor sealing strip (6). The rotor sealing strip (6) divides the interior of the rotor (1) into a low-pressure B chamber (11) and a high-pressure A chamber (12). The low-pressure B chamber (11) and the high-pressure A chamber (12) are connected to each other. 12) Located on the inner and outer sides of the rotor sealing strip (6), the valve disc (5) is provided with multiple oil distribution grooves (7), and the oil distribution grooves (7) are provided with unloading grooves (10). The oil distribution grooves (7) are respectively connected to the low-pressure B chamber (11) or the high-pressure A chamber (12). The valve disc (5) is provided with a first oil passage (8) and a second oil passage (9). The motor external oil port A is connected to the high-pressure A chamber (12) through the housing oil passage and the first oil passage (8) on the valve disc (5). The motor external oil port B is connected to the low-pressure B chamber (11) through the housing oil passage. The high-pressure A chamber (12) and the low-pressure B chamber (11) are respectively connected to the stator and rotor oil chambers (4) through the internal oil passage of the oil distribution groove (7) and the second oil passage (9).

2. The low-noise cycloidal hydraulic motor according to claim 1, characterized in that: The needle tooth (3) is a cylindrical metal rod.

3. The low-noise cycloidal hydraulic motor according to claim 1, characterized in that... The valve disc (5) is provided with seven oil distribution grooves (7), and the seven oil distribution grooves (7) are respectively connected to the low-pressure B chamber (11) or the high-pressure A chamber (12) through their internal oil passages.

4. The low-noise cycloidal hydraulic motor according to claim 1, characterized in that... The unloading groove (10) is circular, triangular or straight groove in shape.

5. The low-noise cycloidal hydraulic motor according to claim 1, characterized in that... The length of the unloading groove (10) is no more than 2 mm.

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