Gear pump temperature and pressure detection mechanism and gear pump

Abstract

The utility model relates to a gear pump temperature and pressure detection mechanism and a gear pump, belongs to the technical field of automobile chassis suspensions, and particularly relates to a gear pump of a five-in-one electric pump assembly applied to an automobile active suspension system.The temperature and pressure detection mechanism comprises a temperature and pressure sensor, and the temperature and pressure sensor is arranged in a connecting hole preset in a pump body of the gear pump; one end of the temperature and pressure sensor is communicated with an oil inlet and an oil outlet of the oil pump, the other end of the temperature and pressure sensor is connected with the temperature and pressure PCB, a sensor base is installed at the rear end of the temperature and pressure sensor in a pressing mode, one end of the sensor base is a plane and is flush with the plane of one side of the pump body, and accurate directional installation of the temperature and pressure sensor can be effectively achieved. Side plates are respectively arranged on two end surfaces of the crescent main plate, the crescent auxiliary plate and the gear ring, and special-shaped sealing rings are arranged on the back surfaces of the side plates, so that axial and radial compensation of the gear pump is realized, the clearance compensation effect is improved, the volume efficiency of the gear pump is improved, and the service life of the gear pump is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of shock absorber production, especially relates to electric pump assembly, and specifically is a gear pump and temperature and pressure detection mechanism of gear pump of five-in-one electric pump assembly. BACKGROUND

[0002] At present, the hydraulic pump for the electric pump assembly of the full active suspension system in the domestic is the bidirectional internal meshing gear structure. In order to keep the stability of operation under different road conditions, the hydraulic pump needs to switch the forward and reverse directions continuously, and provides the hydraulic oil of different pressures to the upper and lower chambers of the shock absorber.

[0003] Due to the symmetrical high-low chamber structure inside the hydraulic pump, the oil flow of forward and reverse output is consistent under the same speed, which requires higher pump part structure and processing, not only meets the high-speed low-torque requirement, but also meets the suspension requirement. Especially for the five-in-one electric pump assembly, higher load requirement is put forward to the gear pump, the five-in-one electric pump assembly often includes two motors, two gear pumps and a controller, the motor and the gear pump are driven by two groups respectively and are controlled by the controller. The controller generally has over-temperature protection, and the controller components have the risk of aging and failure under high temperature, which affects the performance and safety of the vehicle, and at the same time, the high temperature of the oil in the pump will reduce the viscosity, cause the volumetric efficiency to decrease, the parts to wear out, and the performance and service life to be affected, so temperature detection needs to be carried out on each part in the electric pump assembly, and the gear pump is an important part. The existing patent CN222602156U discloses a sensor for detecting the temperature of the gear pump, the sensor is connected with the oil pump inlet and outlet through the connecting hole preinstalled in the pump shell, to realize real-time detection of temperature and pressure, however, the structure and installation connection structure described therein are simple, and the sensor is prone to looseness during installation, which leads to inaccurate detection.

[0004] In addition, the existing gear pump has the structure of crescent main plate and crescent side plate, which provides radial compensation by the cooperation of the crescent main plate and the crescent side plate under the condition of providing certain forward and reverse hydraulic pressure, but when the electric pump provides higher requirements for the gear pump, the gear pump as a high-speed high-pressure structure is prone to vibration in the axial direction during forward and reverse switching, which brings greater gap and more wear, reduces the technical effect and service life; when the gear pump provides relatively low pressure oil, the lack of corresponding flexible buffer structure near the crescent main plate and the crescent side plate leads to rapid wear of the structure on one hand, and also lacks effective sealing means, so that the oil may overflow or even overflow outside the installation gap of the pump cover, which will cause oil leakage and pollution to the electric pump assembly.

[0005] Based on the above problems, people need to optimize the existing design to meet the actual needs. The utility model discloses a kind of gear pump temperature and pressure detection mechanisms, and gear pump using the detection mechanism.

[0006] In order to solve the deficiencies of the prior art, the utility model provides a gear pump temperature and pressure detection mechanism with accurate installation and positioning, and a gear pump using the detection mechanism.

[0007] The technical problem to be solved by the utility model is realized through the following technical solutions.

[0008] A gear pump temperature and pressure detection mechanism includes a temperature and pressure sensor, which is arranged in a pre-set connecting hole of a pump body of a gear pump, connected with oil inlet and outlet of the oil pump, and has a front pump cover and a rear pump cover on both sides of the pump body. In the utility model, the connecting hole is arranged as a stepped hole at the opening of the pump body towards the rear pump cover, and a positioning sealing ring is provided at the bottom of the stepped hole. The rear end of the temperature and pressure sensor is provided with a sensor base, which is located in the stepped hole. One end of the sensor base is connected with the temperature and pressure sensor, and the other end of the sensor base is arranged as a flat surface flush with the flat surface of the pump body towards the rear pump cover.

[0009] In the utility model, the positioning sealing ring is arranged on the temperature and pressure sensor and located between the pump body and the sensor base, providing buffer for the contact between the pump body and the sensor base.

[0010] Further, the end of the sensor base towards the rear pump cover is concave at the center of the end, in which a buffer sealing ring is arranged, located between the sensor base and the rear pump cover, providing buffer for the contact between the temperature and pressure sensor and the rear pump cover while realizing sealing.

[0011] In the utility model, the front end of the temperature and pressure sensor is a spring PIN, the temperature and pressure sensor is connected to a temperature and pressure PCB through the pump body and the front pump cover, and the temperature and pressure sensor is in electrical communication with the controller through the temperature and pressure PCB. Correspondingly, a conductive copper sheet is arranged on the temperature and pressure PCB. The spring PIN of the temperature and pressure sensor transmits the pressure signal to the conductive copper sheet through spring force and contact. The temperature and pressure PCB is fixed to the front pump cover by bolts.

[0012] Further, the front end of the temperature and pressure sensor is provided with an installation sealing ring, which is located between the temperature and pressure PCB and the front pump cover, providing buffer for the contact between the temperature and pressure PCB, the front pump cover and the temperature and pressure sensor.

[0013] A gear pump includes a pump body provided with the above-mentioned temperature and pressure detection mechanism, and has a front pump cover and a rear pump cover on both sides of the pump body. The front pump cover is in an integrated structure with the pump body. The pump body is provided with a gear and a gear ring. A sliding bearing matched with the outer circle of the gear and the gear ring is arranged on the inner wall of the pump body. A crescent main plate and a crescent auxiliary plate are arranged between the gear and the gear ring. Side plates are arranged on the two end faces of the crescent main plate, the crescent auxiliary plate and the gear ring. A special-shaped sealing ring is arranged on the back surface of the side plates.

[0014] In the utility model, the front pump cover and the rear pump cover on the both sides of the pump body are respectively provided with a special-shaped ring groove, the special-shaped sealing ring is installed in the special-shaped ring groove, the longitudinal section of the special-shaped sealing ring is L-shaped, the both sides of the special-shaped sealing ring are wide end face and narrow end face respectively, the center is a passage, the wide end face is close to the side plate, the narrow end face contacts the front pump cover / rear pump cover, and the passage faces the suction and pressure oil area of the gear pump.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The sensor base is adopted to ensure the contact and stable connection of the front end of the temperature and pressure sensor with the temperature and pressure PCB, so that stable transmission of detection data is realized.

[0017] The plane of the sensor base and the plane of the side surface of the pump body are used as the reference surface for positioning, so that the stable press-fitting of the sensor is effectively ensured, and the reference cooperation for the installation orientation of the temperature and pressure sensor is provided.

[0018] Three sealing rings are arranged near the temperature and pressure sensor, and are used for protecting the temperature and pressure sensor and avoiding the hard contact of the temperature and pressure sensor with other rigid structures, so that the temperature and pressure sensor is effectively protected, the sealing measurement space of the temperature and pressure sensor for measuring the temperature and pressure of the oil liquid of the gear pump is effectively sealed by the cooperation of the installation sealing ring and the positioning sealing ring.

[0019] The gear pump adopts the special-shaped sealing ring with pressure compensation to realize the axial compensation of the gear pump, cooperates with the radial compensation of the crescent main plate and the crescent vice plate in the prior art, effectively realizes the bidirectional compensation of the gear pump, can improve the gap compensation effect, can improve the volumetric efficiency of the gear pump, and can further improve the service life of the gear pump. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic view of the installation position of the gear pump structure and the temperature and pressure detection mechanism of the utility model;

[0021] Figure 2 It is a structure schematic view of the temperature and pressure detection mechanism in Figure 1 ;

[0022] Figure 3 It is a structure schematic view of the gear and the gear ring in Figure 1 ;

[0023] Figure 4 It is a structure schematic view of the special-shaped sealing ring in Figure 1 .

[0024] In the figure: rear pump cover 1, temperature and pressure sensor 2, sliding bearing 3, gear 4, front pump cover 5, side plate 6, crescent main plate 7, crescent auxiliary plate 8, gear ring 9, pump body 10, sensor base 11, temperature and pressure PCB 12, conductive copper sheet 13, stepped hole 14, mounting sealing ring 15, temperature and pressure sensor 16, positioning sealing ring 17, buffer sealing ring 18, wide end face 19, narrow end face 20, channel 21, stepped face 22. DETAILED DESCRIPTION

[0025] The utility model will be further described below in combination with the drawings of the specification and specific preferred embodiments, but it does not limit the protection scope of the utility model. EMBODIMENT

[0026] A gear pump temperature and pressure detection mechanism, as shown in Figure 1 and Figure 2 , comprises a temperature and pressure sensor, which is arranged in a pre-set connecting hole of a pump body 10 of the gear pump, the two sides of the pump body 10 are respectively a front pump cover 5 and a rear pump cover 1, the opening of the connecting hole towards the rear pump cover 1 of the pump body 10 is arranged as a stepped hole 14, the bottom of the stepped hole 14 is padded with a positioning sealing ring 17, the positioning sealing ring 17 is sleeved on the temperature and pressure sensor and located between the pump body 10 and a sensor base 11, the rear end of the temperature and pressure sensor is provided with the sensor base 11, the sensor base 11 is located in the stepped hole 14 and internally provided with an elastic structure, one end of the sensor base 11 is in pressure assembly connection with the temperature and pressure sensor, the other end of the sensor base 11 is arranged as a flat surface flush with the flat surface of the pump body 10 towards the rear pump cover 1, the center of the flat surface of the sensor base 11 is concave, and a buffer sealing ring 18 is arranged therein and located between the sensor base 11 and the rear pump cover 1.

[0027] The front end of the temperature and pressure sensor is a spring PIN, the temperature and pressure sensor passes through the pump body 10 and is connected to a temperature and pressure 12 PCB and electrically connected to a controller through the temperature and pressure PCB 12, correspondingly, a conductive copper sheet 13 is arranged on the temperature and pressure PCB 12, the spring PIN of the temperature and pressure sensor is compressed to contact the conductive copper sheet 13, and the temperature and pressure PCB 12 is fixed to the front pump cover 5 through a bolt. The front end of the temperature and pressure sensor is provided with a mounting sealing ring 15, the mounting sealing ring 15 is located between the temperature and pressure PCB 12 and the front pump cover 5 and provides a buffer for the contact of the temperature and pressure PCB 12, the front pump cover 5 and the temperature and pressure sensor; an oil inlet and outlet for detection is located at the rear pump cover 1, a measuring channel penetrating through the sensor base 11 and the buffer sealing ring 18 is arranged between the temperature and pressure sensor and the oil inlet and outlet, and the spring PIN of the temperature and pressure sensor senses the conduction pressure from the measuring channel, so as to realize the detection of the oil temperature and pressure. EMBODIMENT

[0028] A gear pump provided with the pressure 12 detection mechanism in embodiment 1 is communicated with and matched with a motor to form a group, two groups of gear pumps and the motor combination, and a controller constitute a five-in-one electric pump assembly applied to a shock absorber assembly of a vehicle active suspension system. In the embodiment, the gear pump includes a pump body 10, as shown in Figure 1 and Figure 3 The two sides of the pump body 10 are respectively provided with a front pump cover 5 and a rear pump cover 1, the front pump cover 5 is integrally formed with the pump body 10, the pump body 10 is provided with a gear 4 and a gear ring 9, the inner wall of the pump body 10 is provided with a sliding bearing 3 matched with the outer circle of the gear 4 and the gear ring 9, the gear 4 and the gear ring 9 are provided with a crescent main plate 7 and a crescent auxiliary plate 8, the crescent main plate 7 and the crescent auxiliary plate 8 are matched with a sealing rod and a spring sheet to realize the radial compensation of the gear pump. The two end faces of the crescent main plate 7, the crescent auxiliary plate 8 and the gear ring 9 are respectively provided with a side plate 6, and the back surface of the side plate 6 is provided with a special-shaped sealing ring.

[0029] In Figure 4 , the front pump cover 5 and the rear pump cover 1 on the two sides of the pump body 10 are respectively provided with a special-shaped ring groove, the special-shaped sealing ring is installed in the special-shaped ring groove, the special-shaped sealing ring is circular or elliptical, the longitudinal section is L-shaped, the middle part is a stepped surface 22, based on the L-shaped section, the two sides of the special-shaped sealing ring are respectively a wide end surface 19 and a narrow end surface 20, the center is a channel 21, the wide end surface 19 is in close contact with the side plate 6, the narrow end surface 20 is in contact with the front pump cover 5 or the rear pump cover 1, and the channel 21 is opposite to the suction and pressure oil area of the gear pump. During the pressure building process of the gear pump, the stepped surface 22 of the special-shaped sealing ring in the pressure oil area is under the oil pressure, the wide end surface 19 is in close contact with the side plate 6, effectively reducing the end surface leakage, the greater the pressure, the smaller the leakage, and the better the sealing effect.

Claims

1. A gear pump temperature and pressure detection mechanism, comprising a temperature and pressure sensor, the temperature and pressure sensor is arranged in a preset connecting hole of a gear pump body, and is connected with an oil inlet and outlet of the oil pump, two sides of the pump body are respectively a front pump cover and a rear pump cover, characterized in that: The connecting hole is arranged as a stepped hole at the opening of the pump body towards the rear pump cover, the bottom of the stepped hole is padded with a positioning sealing ring, the rear end of the temperature and pressure sensor is provided with a sensor base, the sensor base is located in the stepped hole, one end of the sensor base is connected with the temperature and pressure sensor, and the other end of the sensor base is arranged as a plane and is flush with the plane of the pump body towards the rear pump cover.

2. The temperature and pressure detection mechanism according to claim 1, characterized by: The positioning sealing ring is sleeved on the temperature and pressure sensor and located between the pump body and the sensor base.

3. The temperature and pressure detection mechanism according to claim 2, characterized in that: The end of the sensor base towards the rear pump cover is concave at the center of the end, wherein a buffer sealing ring is arranged and located between the sensor base and the rear pump cover.

4. The temperature and pressure detection mechanism according to claim 1, characterized by: The front end of the temperature and pressure sensor is a spring PIN pin, the temperature and pressure sensor is connected to a temperature and pressure PCB board through the pump body and the front pump cover, and is in electrical communication with the controller through the temperature and pressure PCB board, correspondingly, a conductive copper sheet is arranged on the temperature and pressure PCB board, the spring PIN pin of the temperature and pressure sensor realizes the transmission of the pressure signal of the temperature and pressure sensor to the conductive copper sheet through the elastic force and contact, and the temperature and pressure PCB board is fixed to the front pump cover through bolts.

5. The temperature and pressure detection mechanism according to claim 4, characterized by: The front end of the temperature and pressure sensor is provided with a mounting sealing ring, and the mounting sealing ring is located between the temperature and pressure PCB board and the front pump cover.

6. A gear pump comprising the pump body of the temperature and pressure detection mechanism according to any one of claims 1 to 5, characterized by: The two sides of the pump body are respectively provided with a front pump cover and a rear pump cover, the front pump cover is in an integral structure with the pump body, gears and a gear ring are arranged in the pump body, sliding bearings matched with the outer circles of the gears and the gear ring are arranged on the inner wall of the pump body, a crescent main plate and a crescent auxiliary plate are arranged between the gears and the gear ring, side plates are arranged on the two end faces of the crescent main plate, the crescent auxiliary plate and the gear ring respectively, and profile sealing rings are arranged on the back surfaces of the side plates.

7. The gear pump of claim 6, wherein: The front pump cover and the rear pump cover on the two sides of the pump body are respectively provided with profiled ring grooves, the profile sealing rings are installed in the profiled ring grooves, the longitudinal section of the profile sealing ring is L-shaped, the two sides of the profile sealing ring are respectively wide end faces and narrow end faces, the center is a channel, the wide end faces are in close contact with the side plates, the narrow end faces are in contact with the front pump cover and the rear pump cover, and the channel is opposite to the suction and pressure oil areas of the gear pump.

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