CN208187599U - A kind of measuring device of hydraulic motor starting friction torque - Google Patents
A kind of measuring device of hydraulic motor starting friction torque Download PDFInfo
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- CN208187599U CN208187599U CN201820886354.4U CN201820886354U CN208187599U CN 208187599 U CN208187599 U CN 208187599U CN 201820886354 U CN201820886354 U CN 201820886354U CN 208187599 U CN208187599 U CN 208187599U
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- hydraulic cylinder
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- measuring device
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- directional control
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Abstract
The utility model discloses a kind of measuring device of hydraulic motor starting friction torque.It include: driving hydraulic cylinder, rack gear, gear, torque rotary speed sensor and Driven by Hydraulic Cylinder device；The piston rod of driving hydraulic cylinder connects rack gear；Rack and pinion engagement；Gear passes through the output axis connection of torque rotary speed sensor and tested hydraulic motor；Driven by Hydraulic Cylinder device includes: supply reservoir, hydraulic pump, electromagnetic relief valve and three position four-way directional control valve；The entrance of hydraulic pump connects supply reservoir, and outlet is connected with the P of three position four-way directional control valve mouth；The rod chamber of the A mouth connection driving hydraulic cylinder of three position four-way directional control valve, the rodless cavity of B mouthfuls of connection driving hydraulic cylinders, T mouthfuls of connection supply reservoirs；Electromagnetic relief valve is also connected between hydraulic pump and three position four-way directional control valve, the outlet of electromagnetic relief valve is connect with supply reservoir.The measuring device of the utility model, can starting friction torque to hydraulic motor carry out precise measurement, stability is good, easy to operate.
Description
Technical field
The utility model relates to Fluid Transmission and Control fields, more particularly to a kind of hydraulic motor starting friction torque
Measuring device.
Background technique
Hydraulic motor is using most executive components in Hydraulic Power Transmission System, and hydraulic motor starting friction torque is hydraulic
The important technology index of motor, hydraulic motor starting friction torque size directly affect the position of hydraulic motor movement, speed control
Therefore the stationarity of precision processed and movement measures hydraulic motor starting friction torque, for studying, evaluating and testing friction characteristics on hydraulic motor
Torque factor has important theory and engineering application value.Currently, hydraulic motor starting friction torgue measurement is mainly using pressure
Force control valve controls the operating pressure of liquid, so that hydraulic motor is driven to start, liquid working pressure when hydraulic motor starts
Power can calculate the starting friction torque of hydraulic motor multiplied by the effective area acted on hydraulic motor.This is an inter-species
Measurement method is connect, is not accurate effective since the effective area acted on hydraulic motor is usually the area of nominal size
Area, therefore, there are larger measurement errors for starting friction torgue measurement；In addition, pressure-control valve adjusts control pressure in low pressure
When, there are stronger Nonlinear Adjustment characteristic, sensitivity is low, it is poor to adjust stability, it is not easy to pressure is accurately adjusted, therefore, essence
Really the starting friction torque of measurement hydraulic motor is relatively difficult.
Utility model content
The purpose of the utility model is to provide a kind of measuring devices of hydraulic motor starting friction torque, to improve hydraulic horse
Up to the measurement accuracy of starting friction torque.
To achieve the above object, the utility model provides following scheme:
A kind of measuring device of hydraulic motor starting friction torque, the measuring device include: driving hydraulic cylinder, rack gear,
Gear, torque rotary speed sensor and Driven by Hydraulic Cylinder device；
The piston rod of the driving hydraulic cylinder connects the rack gear, and the Driven by Hydraulic Cylinder device is by driving the driving
The piston rod movement of hydraulic cylinder, and then drive the rack movement；
The rack gear is engaged with the gear；The gear passes through the torque rotary speed sensor and tested hydraulic motor
The working oil chamber of output shaft rigid connection, the tested hydraulic motor connects repairing fuel tank；The engagement of the rack and pinion is transported
It is dynamic, drive the tested hydraulic motor to rotate by the gear；The torque rotary speed sensor is for measuring the tested horse
Up to the moment of friction and velocity of rotation of starting；
The Driven by Hydraulic Cylinder device includes: supply reservoir, hydraulic pump, electromagnetic relief valve and three position four-way directional control valve；Institute
The entrance for stating hydraulic pump connects the supply reservoir, and the outlet of the hydraulic pump is connected with the P of three position four-way directional control valve mouth；
The A mouth of the three position four-way directional control valve connects the rod chamber of the driving hydraulic cylinder, the B mouth connection of the three position four-way directional control valve
The T mouth of the rodless cavity of the driving hydraulic cylinder, the three position four-way directional control valve connects the supply reservoir；The hydraulic pump goes out
The import of the electromagnetic relief valve is also connected between mouth and the P mouth of the three position four-way directional control valve, the electromagnetic relief valve
Outlet is connect with the supply reservoir, and the electromagnetic relief valve is used to control the pressure of hydraulic pump, and then described in adjusting
The working condition of driving hydraulic cylinder.
Optionally, the number of teeth of the gear is greater than 20, and the number of teeth of the rack gear is greater than 2 times of the number of teeth of the gear.
Optionally, the measuring device further include: displacement sensor, institute's displacement sensors and the driving hydraulic cylinder
Piston rod connection, for measuring the displacement of the driving hydraulic cylinder.
Optionally, the measuring device further include: throttle valve, the import of the throttle valve access the outlet of the hydraulic pump
Between the P mouth of the three position four-way directional control valve, the outlet of the throttle valve connects the supply reservoir, and the throttle valve is used for
By adjusting the speed of the driving hydraulic cylinder, and then adjust the velocity of rotation of the tested hydraulic motor.
Optionally, the measuring device further include: temperature sensor, the temperature sensor are fixed on the hydraulic pump
In connecting tube between outlet and the P mouth of the three position four-way directional control valve, the temperature sensor is for measuring the hydraulic pump
The oil liquid temperature of outlet.
Optionally, the measuring device further include: pressure sensor, the pressure sensor are fixed on the hydraulic pump
In connecting tube between outlet and the P mouth of the three position four-way directional control valve, the pressure sensor is for measuring the hydraulic pump
The pressure of outlet.
According to specific embodiment provided by the utility model, the utility model discloses following technical effects:
1, the starting friction torque that hydraulic motor is directly measured using torque sensor, relative to traditional pressure sensor
Indirect measure improves the measurement accuracy of starting friction torque.
2, rack movement is controlled using driving hydraulic cylinder, rack pinion gear motion rotates gear, and gear rotation drives
Tested hydraulic motor rotation.The operating pressure of driving hydraulic cylinder is controlled using throttle valve adjustment, when low pressure is adjusted, sensitivity
Height, stability are good, hydraulic cylinder works pressure size can be adjusted with precision, to improve tested hydraulic motor starting friction torque
Measurement accuracy.
3, rank to the starting friction torque of tested hydraulic motor, can be started by the adjusting to Driven by Hydraulic Cylinder device
The section friction torque characteristics that slowly run are evaluated and tested and are researched and analysed.And measurement accuracy is high, method is simple, easily operated, has
Preferable practicality and reliability.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without any creative labor, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the company that hydraulic motor and gear are tested in the measuring device of the utility model hydraulic motor starting friction torque
Connect schematic diagram；
Fig. 2 is the measuring device middle gear and driving hydraulic cylinder and liquid of the utility model hydraulic motor starting friction torque
The connection schematic diagram of cylinder pressure driving device.
Wherein, 1 is driving hydraulic cylinder, and 2 be rack gear, and 3 be gear, and 4 be torque rotary speed sensor, and 5 be tested hydraulic motor,
6 be repairing fuel tank, and 7 be supply reservoir, and 8 be hydraulic pump, and 9 be three position four-way directional control valve, and 10 be electromagnetic relief valve, and 11 be throttling
Valve, 12 be pressure sensor, and 13 be temperature sensor, and 14 be displacement sensor.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing and have
Body embodiment is described in further detail the utility model.
Fig. 1 is the company that hydraulic motor and gear are tested in the measuring device of the utility model hydraulic motor starting friction torque
Schematic diagram is connect, figure middle gear is side view；Fig. 2 is the measuring device middle gear of the utility model hydraulic motor starting friction torque
With the connection schematic diagram of driving hydraulic cylinder and Driven by Hydraulic Cylinder device, figure middle gear is front view, below with reference to Fig. 1 and Fig. 2
The measuring device of the utility model is illustrated.
The utility model measuring device includes: driving hydraulic cylinder 1, rack gear 2, gear 3, torque rotary speed sensor 4 and hydraulic
Cylinder driving device；Wherein, the piston rod of driving hydraulic cylinder 1 connects the rack gear 2.Driven by Hydraulic Cylinder device is by driving the drive
The piston rod movement of hydrodynamic cylinder pressure 1, and then the rack gear 2 is driven to move.
The rack gear 2 is engaged with the gear 3；Number of gear teeth at least 20, and the ratio between the rack gear number of teeth and number of gear teeth are greater than
2, guarantee that gear at least turns 2 circles.One end of the torque rotary speed sensor 4 connects the rotation axis of the gear 3, other end connection
The output shaft of tested hydraulic motor 5, so that output shaft of the gear 3 by the torque rotary speed sensor 4 and tested hydraulic motor 5
Rigid connection.Two working oil chambers of the tested hydraulic motor 5 connect repairing fuel tank 6.In whole device, using hydraulic-driven
Device moves 1 drive rack 2 of driving hydraulic cylinder, rack gear 2 and 3 gear motion of gear, and the rotation of gear 3 drives tested hydraulic motor
5 rotation, and then by torque rotary speed sensor 4 directly measure under different motion state be tested hydraulic motor 5 moment of friction with
Revolving speed.
The Driven by Hydraulic Cylinder device use by-pass throttle control mode, specifically include: supply reservoir 7, hydraulic pump 8,
Three position four-way directional control valve 9 and electromagnetic relief valve 10；The entrance of the hydraulic pump 8 connects the supply reservoir 7, the hydraulic pump 8
Outlet be connected with the P mouth of the three position four-way directional control valve 9；The A mouth connection driving of the three position four-way directional control valve 9 is hydraulic
The rod chamber of cylinder 1, the B mouth of the three position four-way directional control valve 9 connect the rodless cavity of the driving hydraulic cylinder 1, the 3-position 4-way
The T mouth of reversal valve 9 connects the supply reservoir 7；The three position four-way directional control valve 9 is for commutating to driving hydraulic cylinder 1.
The electromagnetic relief valve is also connected between the outlet of the hydraulic pump 8 and the P mouth of the three position four-way directional control valve 9
10 import, the outlet of the electromagnetic relief valve 10 are connect with the supply reservoir 7, and the electromagnetic relief valve 10 is used for hydraulic
Control and unloading control is adjusted in the pressure of pump 8, and then adjusts the working condition of the driving hydraulic cylinder 1.
The import of throttle valve 11, throttle valve 11 are connected between the outlet of hydraulic pump 8 and the P mouth of three position four-way directional control valve 9
Outlet connected tank 1, throttle valve 11 it is adjustable control driving hydraulic cylinder 1 speed.
Pressure sensor and 12 temperature sensors are connected between the outlet of hydraulic pump 8 and the P mouth of three position four-way directional control valve 9
13, pressure sensor 12 can detecte the operating pressure of the outlet of hydraulic pump 8, and temperature sensor 13 can detecte the outlet of hydraulic pump 8
Oil liquid temperature.
The measuring device further include: displacement sensor 14, the work of institute's displacement sensors 14 and the driving hydraulic cylinder 1
Stopper rod connection, for measuring the displacement of the driving hydraulic cylinder 1.
The workflow that the utility model measures hydraulic motor starting friction torque using above-mentioned measuring device is such as
Under:
1, it is tested hydraulic motor forward rotating movements situation:
Step 1: control electromagnetic relief valve is in unloading condition, throttle valve is fully opened, starts hydraulic pump, it is hydraulic to pump up
It moving after running smoothly, closes throttle valve, control electromagnetic relief valve is in adjustment state, adjusts the regulating hand wheel of pressure of electromagnetic relief valve,
Gradually rise the outlet pressure of hydraulic pump to an experiment value of setting, this experiment value is exactly the peace of hydraulic pump outlet pressure
Total head.
Step 2: fully opening throttle valve, make the pressure reduction of hydraulic pump outlet to zero.
Step 3: control three position four-way directional control valve is in left position, the P mouth of three position four-way directional control valve is connected with A mouthfuls, B mouthfuls and T
Mouth is connected, and gradually slowly reduces throttle valve, the outlet pressure of hydraulic pump gradually slowly increases, in the rod end chamber of driving hydraulic cylinder
Pressure p 1 also therewith gradually slowly increase, when the piston rod of driving hydraulic cylinder relative to cylinder body just started start retract when, turn
The measured torque of square speed probe is exactly the starting friction torque of tested hydraulic motor output shaft rotation.
Step 4: reducing the opening of throttle valve slightly again, the outlet pressure of hydraulic pump also increases slightly, driving hydraulic cylinder
Piston rod carries out retraction movement relative to cylinder body with small speed, and torque rotary speed sensor measures tested hydraulic motor low speed
Moment of friction and velocity of rotation when rotation, the stretch out motion displacement of displacement sensor driving hydraulic cylinder.
2, it is tested hydraulic motor return motion situation:
Step 1: control electromagnetic relief valve is in unloading condition, throttle valve is fully opened, starts hydraulic pump, it is hydraulic to pump up
It moving after running smoothly, closes throttle valve, control electromagnetic relief valve is in adjustment state, adjusts the regulating hand wheel of pressure of electromagnetic relief valve,
Gradually rise the outlet pressure of hydraulic pump to an experiment value of setting, this experiment value is exactly the peace of hydraulic pump outlet pressure
Total head.
Step 2: fully opening throttle valve, make the pressure reduction of hydraulic pump outlet to zero.
Step 3: control three position four-way directional control valve is in right position, the P mouth of three position four-way directional control valve is connected with B mouthfuls, A mouthfuls and T
Mouth is connected, and gradually slowly reduces throttle valve, the outlet pressure of hydraulic pump gradually slowly increases, in the rodless cavity of driving hydraulic cylinder
Pressure p 2 also gradually slowly increases therewith, when the piston rod of driving hydraulic cylinder just starts to start relative to cylinder body to be stretched out, torque
The measured torque of speed probe is exactly the starting friction torque of tested hydraulic motor output shaft rotation.
Step 4: reducing the opening of throttle valve slightly again, the outlet pressure of hydraulic pump also increases slightly, driving hydraulic cylinder
Piston rod carries out stretch out motion relative to cylinder body with small speed, and torque rotary speed sensor measures tested hydraulic motor low speed
Moment of friction and velocity of rotation when rotation, the retraction movement displacement of displacement sensor driving hydraulic cylinder.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Specific case used herein is expounded the principles of the present invention and embodiment, above embodiments
Explanation be merely used to help understand the method and its core concept of the utility model；Meanwhile for the general technology of this field
Personnel, based on the idea of the present invention, there will be changes in the specific implementation manner and application range.In conclusion
The content of the present specification should not be construed as a limitation of the present invention.
Claims (6)
1. a kind of measuring device of hydraulic motor starting friction torque, which is characterized in that the measuring device includes: that driving is hydraulic
Cylinder, rack gear, gear, torque rotary speed sensor and Driven by Hydraulic Cylinder device；
The piston rod of the driving hydraulic cylinder connects the rack gear, and the Driven by Hydraulic Cylinder device is hydraulic by driving the driving
The piston rod movement of cylinder, and then drive the rack movement；
The rack gear is engaged with the gear；The output that the gear passes through the torque rotary speed sensor and tested hydraulic motor
The working oil chamber of axis rigid connection, the tested hydraulic motor connects repairing fuel tank；The gear motion of the rack and pinion leads to
It crosses the gear and drives the tested hydraulic motor rotation；The torque rotary speed sensor is for measuring the tested motor starting
Moment of friction and velocity of rotation；
The Driven by Hydraulic Cylinder device includes: supply reservoir, hydraulic pump, electromagnetic relief valve and three position four-way directional control valve；The liquid
The entrance of press pump connects the supply reservoir, and the outlet of the hydraulic pump is connected with the P of three position four-way directional control valve mouth；It is described
The A mouth of three position four-way directional control valve connects the rod chamber of the driving hydraulic cylinder, described in B mouth of the three position four-way directional control valve connects
The T mouth of the rodless cavity of driving hydraulic cylinder, the three position four-way directional control valve connects the supply reservoir；The outlet of the hydraulic pump with
The import of the electromagnetic relief valve, the outlet of the electromagnetic relief valve are also connected between the P mouth of the three position four-way directional control valve
It is connect with the supply reservoir, the electromagnetic relief valve adjusts the driving for controlling the pressure of hydraulic pump
The working condition of hydraulic cylinder.
2. measuring device according to claim 1, which is characterized in that the number of teeth of the gear is greater than 20, and the rack gear
The number of teeth be greater than 2 times of the number of teeth of the gear.
3. measuring device according to claim 1, which is characterized in that the measuring device further include: displacement sensor, institute
Displacement sensors are connect with the piston rod of the driving hydraulic cylinder, for measuring the displacement of the driving hydraulic cylinder.
4. measuring device according to claim 1, which is characterized in that the measuring device further include: throttle valve, the section
The import of stream valve accesses between the outlet of the hydraulic pump and the P mouth of the three position four-way directional control valve, the outlet of the throttle valve
The supply reservoir is connected, the throttle valve is used for the speed by adjusting the driving hydraulic cylinder, and then adjusts described tested
The velocity of rotation of hydraulic motor.
5. measuring device according to claim 1, which is characterized in that the measuring device further include: temperature sensor, institute
It states temperature sensor to be fixed in the connecting tube between the outlet of the hydraulic pump and the P mouth of the three position four-way directional control valve, institute
Temperature sensor is stated for measuring the oil liquid temperature of the hydraulic pump outlet.
6. measuring device according to claim 1, which is characterized in that the measuring device further include: pressure sensor, institute
It states pressure sensor to be fixed in the connecting tube between the outlet of the hydraulic pump and the P mouth of the three position four-way directional control valve, institute
Pressure sensor is stated for measuring the pressure of the hydraulic pump outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820886354.4U CN208187599U (en) | 2018-06-06 | 2018-06-06 | A kind of measuring device of hydraulic motor starting friction torque |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820886354.4U CN208187599U (en) | 2018-06-06 | 2018-06-06 | A kind of measuring device of hydraulic motor starting friction torque |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208187599U true CN208187599U (en) | 2018-12-04 |
Family
ID=64429049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820886354.4U Expired - Fee Related CN208187599U (en) | 2018-06-06 | 2018-06-06 | A kind of measuring device of hydraulic motor starting friction torque |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208187599U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102097645B1 (en) * | 2019-03-28 | 2020-04-06 | 주식회사 노아 엑츄에이션 | Torque measuring apparatus |
| CN117047559A (en) * | 2023-10-11 | 2023-11-14 | 国家机床质量监督检验中心 | Turntable torque testing device and testing method |
-
2018
- 2018-06-06 CN CN201820886354.4U patent/CN208187599U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102097645B1 (en) * | 2019-03-28 | 2020-04-06 | 주식회사 노아 엑츄에이션 | Torque measuring apparatus |
| CN117047559A (en) * | 2023-10-11 | 2023-11-14 | 国家机床质量监督检验中心 | Turntable torque testing device and testing method |
| CN117047559B (en) * | 2023-10-11 | 2024-01-30 | 国家机床质量监督检验中心 | Turntable torque testing device and testing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181204 Termination date: 20190606 |