Speed regulator and engine adopting speed regulator

Abstract

The utility model relates to the field of diesel engine parts, in particular to a speed regulator and an engine adopting the speed regulator. A speed regulator comprises a shell, and the shell comprises a speed regulation lever component which comprises a speed regulation lever and a connecting rod; the speed regulating arm is arranged at the rear part of the shell, and the speed regulating arm part is in press fit with a thrust shaft; a speed regulating shaft; the speed regulation torsion spring penetrates through the speed regulation shaft; the speed regulator comprises a speed regulator, a corrector, a stabilizer and an engine adopting the speed regulator. The problems of running block and rotating speed fluctuation of an engine adopting a tension spring type fuel injection pump speed regulator are solved.

Description

Technical Field

[0001] This application relates to the field of diesel engine components, and particularly to a governor and an engine using such a governor. Background Art

[0002] Engineering machine engines, especially diesel engines used in forklifts and loaders, have relatively high requirements for the ability and stability of low idle load. During operation, there should be no engine stalling or hunting, otherwise it will be impossible to move the workpiece smoothly and may even cause damage to the workpiece. 2. Fixed power sources such as generator sets have relatively high requirements for the stability of the frequency and voltage magnitude of their output voltage during use. Fluctuations in frequency and voltage will cause certain damage to electrical appliances; and their speed regulation rate is relatively low, generally ≤5%. In order to ensure the stability of the frequency and voltage during the operation of the generator set and at the same time ensure that its speed regulation rate meets the requirements, this poses relatively high technical requirements for its fuel control device, the governor.

[0003] However, ordinary governors use tension springs for control. Due to their structural limitations, during the movement of the tension spring when the speed regulation speed changes, the effective stiffness of the spring changes due to the change in the angle between the tension spring and the speed regulation arm, and the instability of the spring stiffness leads to the instability of the engine speed. This is the main reason for the relatively many problems of hunting in engines controlled by tension spring governors. Especially in generator sets where the speed regulation rate ≤5% is required, there are often phenomena of unstable speed or hunting, resulting in large fluctuations in the frequency and voltage magnitude of their output voltage, and even damage to electrical appliances. Similar phenomena also occur when forklifts and loaders are operating at low speeds, and users cannot use them normally. Thus, it can be seen that ordinary tension spring governors cannot meet the requirements of engineering machinery and generator sets, and design improvements are needed. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the foregoing prior art, this application intends to provide a governor and an engine using such a governor.

[0005] The technical solution of the present utility model is a governor, which includes a housing, and the housing includes:

[0006] A speed regulation lever component, the speed regulation lever component includes a speed regulation lever and a connecting rod. The speed regulation lever is connected to the rear part of the housing through an intermediate shaft, and the connecting rod is arranged on the speed regulation lever;

[0007] A speed regulation arm, the speed regulation arm is arranged at the rear part of the housing, and the speed regulation arm component press-fits a thrust shaft;

[0008] A speed regulation shaft, the speed regulation shaft is arranged at the upper end of the housing;

[0009] A speed-regulating torsion spring passes through the speed-regulating shaft. When the speed-regulating shaft rotates, it drives the speed-regulating torsion spring to rotate through a screw, and the other end of the speed-regulating torsion spring drives the speed-regulating arm to rotate clockwise; and,

[0010] A corrector, one end of which is arranged outside the housing, and the movement stops when the speed-regulating arm contacts the other end of the corrector;

[0011] A stabilizer, one end of which is arranged outside the housing, and the other end of the stabilizer is connected to the speed-regulating arm.

[0012] Further, a round hole is provided on the speed-regulating lever.

[0013] Further, an accelerator is provided at the lower end of the speed-regulating arm, and the other end of the stabilizer is connected to the speed-regulating arm through the accelerator.

[0014] Further, a support block is provided at the lower end of the speed-regulating arm, and the other end of the stabilizer is connected to the speed-regulating arm through the support block.

[0015] Further, the shape of the support block is T-shaped.

[0016] Further, the distance from the thrust shaft to the intermediate shaft and the distance from the support block to the intermediate shaft are (1 - 1.5):1.

[0017] Further, the stabilizer includes a screw sleeve, and a spring is arranged inside the screw sleeve.

[0018] Further, the screw sleeve includes a large screw sleeve and a small screw sleeve, the spring includes an inner spring and an outer spring, the inner spring and the outer spring are arranged inside the large screw sleeve, and the small screw sleeve is arranged at the rear end of the large screw sleeve.

[0019] Further, needle roller bearings or bushings made of powder metallurgy are arranged at both ends of the thrust shaft.

[0020] Further, the speed-regulating torsion spring is double-armed, and the lower end of the torsion arm of the speed-regulating torsion spring has a 15° bend.

[0021] The present utility model also provides an engine adopting the above speed governor. Beneficial effects

[0022] 1. During the starting condition of the engine, it moves to the right end of the round hole on the speed-regulating lever under the action of the tooth bar return spring force. At this time, the tooth bar is at the rightmost position in the maximum fuel position, and the starting condition of the engine is completed.

[0023] 2. When the engine is operating under the rated conditions, the torque generated by the rotation of the speed control torsion spring driven by the speed control shaft drives the speed control arm component and the speed control lever component to rotate clockwise through the thrust shaft. When the speed control arm contacts one end of the corrector, the rotation stops. The centrifugal force generated by the flyweights pushes the speed control lever component to rotate counterclockwise through the support block at the lower end of the speed control lever. At a certain position, the lower end of the speed control lever component contacts the stabilizer component. The speed control lever component is in a balanced position under the action of the centrifugal force of the flyweights and the resultant force of the speed control torsion spring and the stabilizer. The rack no longer moves, the fuel injection pump injects fuel stably, and the engine operates stably.

[0024] 3. The utility model patent solves the problems of hunting and speed fluctuation that occur in the engine with a pull-spring type fuel injection pump governor. Especially when forklifts and loaders are operating at low idle speeds and the generator sets meet the speed regulation rate ≤ 5%, the frequency and voltage of the current output by the generator sets are stable and have good consistency, which can meet the usage requirements of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the governor of the present application;

[0026] Figure 2 is a sectional view of the governor of the present application;

[0027] Figure 3 is Figure 2 an enlarged schematic view of the accelerator part in

[0028] Figure 4 is a schematic structural diagram of the speed control lever component of the present application;

[0029] Figure 5 is a schematic structural diagram of the stabilizer of the present application;

[0030] Figure 6 is a partial schematic structural diagram of the fuel injection pump after applying the governor to the fuel injection pump;

[0031] In the figure: 1. Flyweights; 2. Speed control lever; 3. Speed control torsion spring; 4. Rack; 5. Screw; 6. Rear part; 7. Connecting rod; 8. Corrector; 9. Speed control arm; 10. Stabilizer; 101. Large nut; 102. Small nut; 103. Inner spring; 104. Outer spring; 11. Accelerator; 13. Speed control shaft; 14. Thrust shaft; 15. Intermediate shaft; 16. Small rear cover. DETAILED DESCRIPTION OF THE EMBODIMENTS Embodiment

[0032] As Figure 1 , 2 shown, a governor includes a housing, and the housing includes:

[0033] As Figure 4A speed control lever component as shown, the speed control lever component includes a speed control lever 2 and a connecting rod 7. The speed control lever 2 is connected to the rear part 6 of the housing through an intermediate shaft 15. The connecting rod 7 is arranged on the speed control lever 2. The connecting rod is arranged on the speed control lever. A connecting pin is riveted to the upper end of the speed control lever, and the connecting pin hole is at an angle of 45° in the vertical direction. One end of the connecting rod is a connecting pin and the other end is a round hole; A speed control arm 9, the speed control arm 9 is arranged at the rear part 6 of the housing. The upper end of the speed control arm 9 is press-fitted with a thrust shaft 14. Needle roller bearings or bushings made of powder metallurgy are arranged at both ends of the thrust shaft 14, such as Figure 2 、 3 An accelerator 11 or a support block is arranged at the lower end of the speed control arm 9. The shape of the support block is T-shaped. The distance from the thrust shaft 14 to the intermediate shaft 15 and the distance from the support block to the intermediate shaft 15 are (1 - 1.5):1, and here it is 1:1;

[0034] A speed control shaft 13, the speed control shaft 13 is arranged at the upper end of the housing. When the speed control shaft 13 rotates, it drives a speed control torsion spring 3 to rotate through a screw 5. The speed control torsion spring 3 is a double-arm torsion spring. There is a 15° bend at the lower end of the torsion arm of the speed control torsion spring 3. The other end of the speed control torsion spring 3 drives the speed control arm 9 to rotate clockwise;

[0035] A corrector 8, one end of the corrector 8 is arranged outside the housing. When the speed control arm 9 touches the other end of the corrector 8, it stops moving;

[0036] Such as Figure 5 A stabilizer 10 as shown, one end of the stabilizer is arranged outside the housing. The other end of the stabilizer is connected to the accelerator. The stabilizer 10 includes a screw sleeve. A spring is arranged inside the screw sleeve. The screw sleeve includes a large screw sleeve 101 and a small screw sleeve 102. The spring includes an inner spring 103 and an outer spring 104. The inner spring 103 and the outer spring 104 act successively at different speeds and the spring pre-tightening force can be adjusted as needed. The stabilizer 10 is fixed on the small rear cover 16 through a nut.

[0037] An engine, the engine includes the governor. The connecting rod 7 in the governor is connected to the rack 5 of the fuel injection pump. Figure 6After applying the governor to the fuel injection pump, it is a partial structural schematic diagram of the fuel injection pump. When the engine is operating under the rated condition, the governor shaft 13 drives the governor torsion spring 3 to rotate through the screw 5, and the generated torque drives the governor lever 2 to rotate clockwise. When it touches the corrector 8, it stops rotating. At this time, the centrifugal force generated by the flyweight 1 pushes the governor lever 2 to rotate counterclockwise through the sliding sleeve and the T-shaped support block. When it rotates to a certain position, it touches the stabilizer 11. By adjusting the pre-tightening force length of the inner and outer springs of the stabilizer 11, the centrifugal force is balanced with the resultant force of the governor torsion spring 3 and the stabilizer 11. At this time, the governor lever 2 stops rotating, and then the rack 5 stops moving, and the fuel injection volume of the fuel injection pump remains unchanged, and the engine operates stably. The wire diameter of the governor torsion spring 3 can be designed according to the speed and power of the generator set to meet the needs of the generator set.

[0038] The governor torsion spring 3 and the stabilizer 11 can be designed with different stiffnesses and matched into different combination forms to meet the requirements of different engine speeds and powers. The generator using this governor device keeps the frequency and voltage values of its output current unchanged during power generation, with good consistency, eliminating the phenomena of hunting and unstable speed of the generator set, construction machinery, and tractor. The speed regulation rate can meet the requirement of ≤5%, meeting the normal use requirements of the engines for construction machinery and fixed power applications. Embodiment

[0039] The difference from Embodiment 1 is that a round hole is provided on the governor lever. The round hole passes through the thrust shaft and moves back and forth with the governor intermediate shaft as the fulcrum to achieve the starting enrichment function.

Claims

1. A speed governor, comprising a housing, characterized in that, The housing includes: A speed regulating lever component, which includes a speed regulating lever and a connecting rod. The speed regulating lever is connected to the rear part of the housing through an intermediate shaft, and the connecting rod is arranged on the speed regulating lever; A speed regulating arm, which is arranged at the rear part of the housing, and the speed regulating arm press-fits a thrust shaft; A speed regulating shaft, which is arranged at the upper end of the housing; A speed regulating torsion spring, which passes through the speed regulating shaft. When the speed regulating shaft rotates, it drives the speed regulating torsion spring to rotate through a screw, and the other end of the speed regulating torsion spring drives the speed regulating arm to rotate clockwise; and, A corrector, one end of which is arranged outside the housing, and the speed regulating arm stops moving when it contacts the other end of the corrector; A stabilizer, one end of which is arranged outside the housing, and the other end of the stabilizer is connected to the speed regulating arm.

2. The governor according to claim 1, characterized in that, A round hole is arranged on the speed regulating lever.

3. A governor according to claim 1, characterized in that, An accelerator is arranged at the lower end of the speed regulating arm, and the other end of the stabilizer is connected to the speed regulating arm through the accelerator.

4. A speed governor according to claim 1, characterized in that, A support block is arranged at the lower end of the speed regulating arm, and the other end of the stabilizer is connected to the speed regulating arm through the support block.

5. A speed governor according to claim 4, characterized in that, The support block is in a T shape.

6. A speed governor according to claim 4, characterized in that, The distance from the thrust shaft to the intermediate shaft and the distance from the support block to the intermediate shaft are (1 - 1.5):

1.

7. A governor according to claim 1, characterized in that, The stabilizer includes a screw sleeve, and a spring is arranged inside the screw sleeve.

8. A speed governor according to claim 7, characterized in that, The screw sleeve includes a large screw sleeve and a small screw sleeve, the spring includes an inner spring and an outer spring, the inner spring and the outer spring are arranged inside the large screw sleeve, and the small screw sleeve is arranged at the rear end of the large screw sleeve.

9. A governor according to claim 1, characterized in that, Needle bearings or bushings made of powder metallurgy are arranged at both ends of the thrust shaft.

10. A governor according to claim 1, characterized in that, The speed regulating torsion spring is double-armed, and the lower end of the torsion arm of the speed regulating torsion spring has a 15° bend.

11. An engine, characterized in that, The engine includes a speed governor according to any one of claims 1 - 10.

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